Extrusion systems: product lines reviewed.

EXTRUSION SYSTEMS

A.I.M. INTERNATIONAL INC.

Offers a full line of corrugators can capable of producing a tubing from 0.33- to 31.50-in. diam, out of PVC, PE, PP, PA, PFA, TFA, etc. Company's Unicor design reportedly offers the highest quality product along with maximum output rates. Also offered is equipment to produce large-bore pipe out of PVC, PE, PP, etc., up to 120-in. diam. through a spiral winding system patented by A.G. Petzetakis.

Company can offer a complete line of machinery and equipment to produce multilayer foam-core pipe in sizes ranging from 2-through 8-in.-diam, for PVC, PE, or composites.

APV CHEMICAL MACHINERY INC. See Sterling Div./Davis-Standard.

ADDEX, INC.

Specializes in blown film dies, air rings, and IBC systems, and also supplies nip rolls and complete film lines. Products include an improved laminar-flow air ring and a noncontact internal bubble-cooling system, which employs up to eight external ultrasonic sensors and controls layflats to 1/10 in. Ease of operation enables dialing in width changes on-the-fly. The system is retrofitable.

Film reclaim system uses conical screws for positive feeding of scrap film. The unit can feed melted scrap directly into a monolayer or coextrusion die. It also can produce finished pellets. Extruders come in sizes of 2 1/2-, 3 1/2-, 4 1/2-and 6-in. diam. with outputs of 200, 350, 700, 1200 lb/hr average and 300, 500, 1000 and 1800 lb/hr peak.

AKRON EXTRUDERS, INC.

Single-screw extruders from 3/4 in. through 4 1/2 in. are available. Company offers a range of extruders, including heavy-duty models (for rigid vinyl applications) with a variety of options in hp, L/D, extruder drives and heating zone configurations.

In addition, company supplies replacement and repaired screws and barrels for most makes of extruders and injection machines. Service include a screw library with over 3000 drawings of various types and configurations, and screw coatings for abrasion and corrosion resistance. Company can replace existing screws or design new ones for specific requirements at no additional charge. (See ad p. 198.)

AL-BE INDUSTRIES, INC.

Company has a standard line of single-screw extruders (1-, 1 1/4-, 1 1/2-, 2- and 2 1/2-in. diam.) and also manufactures custom-designed units with diameters up to 8 in. All models have bimetallic-lined barrels with up to 30:1 L/D. High-capacity thrust housings are provided for long bearing life. Auxiliary equipment includes vacuum sizers and cooling tanks (the latter with optional built-in refrigeration units), hauloffs, cutoff saws, coilers, and dies for pipe, tubing or pelletizing.

ALPHA MARATHON MFG. INC.

Manufactures plastic processing machinery for blown film. Product line includes blown film dies - single-layer and coextrusion, air rings, extruders, top nips and winders.

ALPINE AMERICAN CORP.

HOSOKAWA MICRON INT'L.

Complete blown film systems are offered for single-layer HDPE and for co-extrusion of HDPE with LDPE and LLDPE. Screw diameters range from 1.5 to 3.5 in.; dies and air rings measure 3 to 22 in.; takeoffs and winders handle widths up to 120 in. and diam, up to 60 in. with maximum line speeds over 500 fpm. Grooved feed barrels with solid tungsten carbide for generating high outputs at low-melt temperatures are standard. Options include stationary or rotating extruders and winders, oscillating nips designed specifically for the full spectrum of high- and low-density polymers, upward or downward extrusion, spiral dies in one- or three-layer designs, PEAC cooling system with IBC, and complete microprocessor controls. The maximum cooling capacity with HMW-HDPE is 25 lb/in. of die circumference. Bag machines include a three-track t-shirt machine and a bottom-seal can-liner machine.

AMERICAN BARMAG CORP.

Offers the following extrusion packages: Blown film systems for single-ply and multilayer film (up to seven layers), with extruder sizes from 1.8- to 6-in. diam.; tape extrusion lines, including winders, with widths from 16 to 71 in.; monofilament extrusion lines for polyolefins, nylon and PET; flat film and sheeting installations for monolayer and coextrusion technology; single-screw extruders as large as 12-in. diam.; and melt filters for continuous and discontinuous production at up to 8800 lb/hr. Also provided are melt-spinning pumps, and gear and discharge pumps. Company also tailors lines to customer needs. (See data sheets pp. 216-217.)

AMERICAN JET STREAM, INC.

Offers complete extrusion systems for HDPE, LLDPE, LDPE from Plastimac; and twin-screw extruders for compounding from Maris.

Also distributes Plastimac multiline bag-making machines for T-shirts and conventional bags with in-line or off-line printing.

AMERICAN LEISTRITZ EXTRUDER

CORP.

Twin-screw extruders in both corotating and counterrotating modes and auxiliary equipment are available for complete production lines for compounding (including color concentrates) and scrap reprocessing. Units have from 0.7- to 6.75-in. (18 to 130 mm) diam. screws and outputs of under 10 lb/ hr to 5000 lb/hr of commodity and engineering polymers. All machines are modular, including segmented screws for specific applications.

A universal laboratory extruder has attachments for three twin-screw modes and for single-screw operation. Auxiliary equipment, including blown film, sheet, and profile attachments, is available. Company also supplies hotface pelletizing systems with capacities up to 5000 lb/hr.

Extruders are manufactured by Leistritz AG, Nurnberg, Germany. (See ad p. 236.)

AMERICAN MAPLAN CORP.

Offers a line of five twin-screw extrusion systems for rigid PVC pipe: two conical and three parallel twin-screw extruders. The DSK-52 and 62 are low-output, high-pressure machines, and the TS 80, 100, and 130 are twin-screw extruders with L/D ratio of 24:1. Diameters range from 1/2 in. to 36 in., and outputs from 250 to 2400 lb/hr. Oil cooling is an integral part of the machines. Tooling for PVC pipe and profile, replacement barrels and screws, and calibrating systems are also available.

AMUT S.P.A. See Carl G. Brimmekamp and Co.

ASHLAND TAYLOR INC.

Manufactures complete and fully integrated extrusion lines for production of corrugated pipes with patented corrugators and dual-wall pipe tooling systems, blown film systems with in-line bag-making and converting equipment coupled with automatic packaging, and scrap reclaim and pelletizing systems. Extruders range from 3/4- to 18-in. diam. Custom-designed extrusion tooling and extruders are also offered with patented screw designs.

BATTENFELD EXTRUSIONSTECHNIK

See Battenfeld Gloucester Engineering and Purnell International.

BATTENFELD GLOUCESTER

ENGINEERING CO., INC.

Manufactures converting systems for both in-and-out-of-line operations, single and multilayer blown film extrusion systems for packaging, thick/thin or stretch film applications, and bagmaking; and complete systems for sheet, cast film, foam and extrusion coating. Other equipment includes reclaim extrusion systems, PVC window profile, HDPE and PVC pipe extrusion systems, as well as a complete line of granulators and pelletizers. All extrusion systems are available with the Extrol 6000 Series Microprocessor Control Systems.

Company has also taken over manufacturing and marketing of Battenfeld Extrusiontechnik pipe and profile extrusion equipment in North America. PVC pipe extrusion systems can be supplied with parallel twin-screw extruders up to 130-mm diam., CNC computer control, and a reportedly unique self-centering die. PVC window and other profile systems can also be supplied. Polyolefin pipe systems include single-screw extruders of 65- to 150-mm diam.

Battenfeld's single- and twin-screw extruders and downstream equipment are being redesigned for the North American market. market.

BAUSANO See Tex America, Inc.

BERLYN CORP.

Offers extruders and filters, single-screw extruders from 3/4-in. diam. to 15-in. diam. and all L/D ratios; filters and screenchangers, including slideplate, continuous and automatic types; downstream strand equipment, dies, water baths, air strippers and pelletizers; underwater pelletizing systems to 6000 lb/hr; and other sheet, film and winding equipment, and polymer melt pumps.

BERSTORFF CORP.

Offers corotating, twin-screw mixing extruders and pelletizing systems. (See listing under Compounding, Mixing, Blending Systems.)

BLACK CLAWSON CO.

Systems available include completely integrated processing lines for flat cast film, embossed cast film, stretch wrap, extrusion lamination; extrusion coating of paperboard, woven and non-woven substrates; oriented-film lines, and oriented-tape and fiber lines. Single-screw extruders range from 2 1/2- to 12-in. diam., with standard L/Ds of 24:1 and 30:1. Accessories include film and coating dies, primer coaters and dryers, film winders, unwinds, slitter/rewinders, and coextrusion systems for cast film and extrusion coating. All systems are available with microprocessor-based controls.

Custom-built, single-screw compounding/pelletizing extruders with melt-feed, cold-feed and batch-feed designs are being offered in diameters up to 20 in. Output rates extend to over 60,000 lb/hr.

STEWART BOLLING CO.

Hot-melt, single-screw compounding extruders are offered in standard sizes ranging from 4 1/2- to 20-in. nominal screw diam. Company can custom design machines to suit unique applications. Dies are available for strip, strand, underwater, and dry-face pelletizing.

BOMONT PLASTICS CORP.

DIV. OF BOMONT INDUSTRIES

Offers complete systems ranging from laboratory to 6-in. production extrusion lines. Emphasis is on custom-designed machinery for film, sheet, monofilament, slit tape and strapping. Company offers rebuilt screws and barrels to meet specific requirements.

BOSTON MATTHEWS, INC.

Manufactures single-screw extruders, vacuum baths, cooling troughs, haul-offs, automatic cut-off saws, coilers, and complete extrusion lines for the production of pipes and profile, and the insulation of wire and cables.

THE BOULIGNY CO. See RPM Extrusions Div.

C.W. BRABENDER INSTRUMENTS

Lab and pilot-plant single-screw extruders come in 3/4- and 1 1/4-in. diam. with L/Ds of 10:1, 15:1, 20:1, 25:1 and 30:1. When attached to the company's Plasti-Corder drive, units become miniature process-sensing elements that chart the extrusion cycle. Also available are custom-designed tooling and a complete line of interchangeable dies and screws, such as dies for capillary flow, blown film, wire coating, sheet, and profiles. Company supplies a variety of hoppers, gravity and force feeders, and takeoff units for sheet, blown film and wire.

Counterrotating, intermeshing twin-screw extruders for laboratory or pilot-plant work are also offered: a parallel-screw, 1.65-in. model for high-shear continuous mixing of rigid PVC and polyolefins at rates up to 20 lb/hr; a parallel 1.4-in. model with higher L/D, designed mainly for profile extrusion at rates up to 45 lb/hr; and a conical design for extrusion/mixing of heat-sensitive or highly lubricated materials at a rate of up to 35 lb/hr (supplied also in a corotating design).

BRAMPTON ENGINEERING INC.

Single-screw extruders for blown film, pipe, profile, foam sheet, sheet, wire and cable, and compounding are offered. Extruders are manufactured with 1- to 6-in. screw diam. and L/D ratios up to 40:1.

Complete blown film lines are available with coextrusion and single-layer dies up to 84-in. diam. and coextrusion dies for 2, 3, 5 or more layers in rotating, oscillating or stationary configurations. Dies for foam sheet, pipe coating, wire coating, hose and pipe are supplied. Both center and surface winders in widths to 120 in. are manufactured.

CARL G. BRIMMEKAMP & CO., INC.

Single- and twin-screw extruders from Amut S.p.A. are available up to 6 1/3 in. Complete systems are available for pipe and profile, blown film extrusion and coextrusion up to five layers, and plain and corrugated sheet extrusion-and coextrusion up to six layers. Reclaim and pelletizing systems are also available. Laboratory extruders from Dr. Collin GmbH of Germany are available for pipe, profile, blown and cast film extrusion and coextrusion in sizes from 3/4-in. to 1 3/4-in. A Collin lab twin-screw compounder operates in either corotating or counterrotating mode.

BROWN PLASTICS ENGINEERING CO.

A line of small extrusion systems up to 1 1/2 in. is offered for lab, school, R&D and production uses. Used machinery, screenchangers, pelletizing, wire and cable, fiber and filament systems are also available. Services include screw and barrel repairs. Company also rebuilds plastics machinery of all types and offers refurbished machinery for sale.

BUSS AMERICA, INC.

The Buss-Kneader is a reciprocating single-screw extruder designed for compounding thermoplastics, thermosets, powder coatings, rubbers, and chemicals. The key feature of the unit is a reciprocating motion superimposed on the rotation of the screw, which causes a positive exchange of material in both axial and radial directions to achieve a homogeneous distribution and dispersion of all components. The intensity of the kneading action can be altered by adapting the shape and clearance of the kneading elements. All machines are of modular design.

The Buss-Kneader typically has 7:1, 11:1 or 15:1 L/D. Processing advantages reportedly include short residence time, positive conveyance of material, low pressure (25-150 psi), progressive shear mechanism, energy efficiency and self-purging action. Barrel liners and screw elements are reportedly easy to change.

CINCINNATI MILACRON

PLASTICS MACHINERY DIV.

Manufactures twin-screw extruders designed to process heat-sensitive materials such as flexible or rigid PVC. Four basic machine models are available: the CM-55, CM-65, CM-80, and CM-90 conical twin-screw designs. System downstream equipment includes vacuum calibration tables, puller, saws, collection tables, spray baths, dry-face cutters, and pneumatic cooling systems. Output rates of rigid PVC range from 10 to 2500 lb/hr. Complete systems produce pipe, siding, sheet, window profile, and pellets.

Also offered are integrated single-screw extrusion and thermoforming systems for crystal PS and PP based on technology from OMV of Italy. Company also owns Sano Design & Machine Co.

A brand-new Apex line of single-screw extruders comes in diameters of 2 1/2, 3 1/2, 4 1/2 and 6 in. with standard L/Ds of 25:1 and 30:1 and air or water cooling. They're said to be built of heavy-duty components with versatile drives that can be supplied either right- or left-hand or truck-under position. Brushless d-c drive is standard. New EX compact microprocessor control panel is optional. The new extruders and a brand-new spiral die head will be offered in polyolefin pipe extrusion systems.

Milacron has also newly introduced replacement screws and barrels for both parallel and conical twin-screws of German and Austrian makes. (See data sheets pp. 220-221.)

CONAIR RECLAIM TECHNOLOGIES

THE CONAIR GROUP, INC.

Offers a complete range of auxiliary equipment specifically for the conveying, separation, granulation, size reduction, and blending of reclaimed materials. Although company does not manufacture extruders, it provides complete extrusion systems through a wide network of OEM extruder manufacturers using company's auxiliaries. (See ads pp. 202, 282; data sheets pp. 348-395.)

CONAIR GATTO

THE CONAIR GROUP, INC.

Offers a complete line of extrusion equipment for producing, plastic pipe, tubing and profiles in sizes up to 48-in. diam. Complete extrusion systems, or individual components, such as dies, sizing and cooling tanks, take-off and cut-off units, saws, coilers, and dump tables are available. Extrusion lines can be supplied with standard electrical packages or microprocessor-based automated systems. Safety features are said to meet OSHA standards. Company builds a 1 1/4-in., 24:1 single-screw extruder with water-cooled barrel, 5-hp drive, and controls for screw speed, three barrel zones, and two die zones.

Services offered include engineering, consulting, training, and pretesting of the lines. (See ads pp. 282, 202; data sheets pp. 348-395.)

CORMA INC.

Offered are systems for plastic corrugated pipe or tubing. Seven standard models cover a range from 1/8 in. to 60 in. of corrugated pipe, including systems for dual-wall corrugated pipe, and large-diameter spiral-wound pipe from 15-in. to over 66-in. diam. Company also builds aftercoolers, perforators, slitters, cut-offs and winders, and offers a complete line of extruders with its corrugators.

New products include rib pipe systems for underground electrical utility ducting and sanitary sewer pipe; range of machinery is from 1 1/4-in. to 27-in. Company also sells individual machines, corrugator lines or turnkey installations.

CROWN MACHINE DIV.

CROWN PRODUCTS, INC.

Designs and manufactures a full line of custom-designed biaxial and unidirectional orientation extrusion systems for PS, PP, PVC, PPS, PE and nylon film and sheet. Extruders are available in single-screw configuration of 2 1/2-to 12-in. diam. and L/D ratios from 12:1 to 38:1, and feature patented feed sections with accelerated feed grooves and laser-aligned barrel- and thrust-bearing assemblies to reduce vibration, wear and energy consumption. Screws are custom-designed, and barrels are bimetallic. All systems employ microprocessor and/or computer control to maintain high output rates and precise product specifications. Biaxial orientation lines include extruder, machine-direction orienter, transverse-direction orienter, infrared or convection oven, die and winder.

Company also designs and manufactures cast sheet and film lines as well as a line of standard extruders and pelletizers. A complete selection of auxiliary equipment such as gear pumps, screenchangers, adapters and filters is available.

CUSTOM SCIENTIFIC INSTRUMENTS

Company's specialty is laboratory and pilot-plant mixing extruders that operate on the elastic-melt principle; a screwless extruder uses the elastic-energy storage characteristics of polymer melts for mixing and extrusion. Residence time is said to be short (typically, 20-31 sec), and the amount of shear applied to the melt and the degree of mixing reportedly can be varied.

Two models are available: one with a 2-in. diam. rotor and 1/4-in. outlet die, and the other with a 3/4-in. diam. rotor and 1/8-in. outlet die. Temperature controls are provided for rotor and die; and water-cooling channels regulate the temperature of the feed hopper. System handles pellet, powder, flake or crumb. Typical applications for the unit include compounding, polymer blending, fiber melt spinning, and pelletizing.

DAVIS-STANDARD

CROMPTON & KNOWLES CORP.

Provides customized extruders, feed screws, drives and controls for processes such as wire and cable, pipe, profile, sheet, blown film, blow molding, elastomer, compounding, reclaim/recycle and fiber. Customization continues for such proprietary new technologies as rotary thermoforming of microwaveable barrier containers, the melt-blown process nonwovens manufacturing, high-speed compression molding of beverage bottle caps and high-throughput for OPP film manufacturing. Extruders vary in size from 1- to 12-in. diam. Custom designed screws are supplied to operate at high outputs and quality, melting plastic to form sheets, pellets, tubing or film.

Company continues to provide multilayer barrier film and sheet extrusion systems and is also involved in recycling of plastics with custom-designed extruders to handle low-bulk-density scrap.

For rigid PVC profiles, company has introduced new twin-screw Gemini machines that are reportedly rugged and as easy to operate and maintain as single-screw extruders. In medical products, company's new flexible PVC tubing systems provide production rates to 400 fpm; ultra-precise ID-OD-ovality tolerances; screw designs to allow for high product clarity; and continuous ultra-low-tension coiling. In conjunction with the new medical tubing systems, new 1-in., 1 1/4-in., and 1 1/2-in. floor-model extruders have been introduced.

In drives and controls, company has been active in programming and packaging process line controls for CIM. These systems incorporate patented dual-sensor, anticipatory temperature controls; System 8801 process control; and the Epic 1 color, touch-screen supervisory control system.

Company offers extrusion processors specialized technical services, equipment rebuilding and modernization of machinery and controls. Rebuilding all makes of extruders is accomplished with custom packages to improve output and performance.

Company is also offering its own line of blown film dies and rotators, ranging from single-layer dies to five-layer coextrusion systems in sizes up to 86-in. diam. (See ad p. 201.)

DELTAPLAST MACHINERY LTD.

Offers its Delta line of single-screw extruders from 1 to 6 in. diam. Models are liquid- or air-cooled and have company's Deltatherm heating/cooling systems, heat-failure alarm systems, in-stream hopper metal traps, open-frame construction and unitization.

Also builds caster-mounted and column-mounted coextruders, as well as dies, profile sizers, cooling tanks, and custom-engineered screws. Company also rebuilds equipment. (See ad p. 204.)

DROSSBACH N.A., INC.

Manufactures extruders and complete extrusion lines and specializes in corrugating equipment for producing pipe and tubing.

DURHAM INTERNATIONAL CORP.

Provides complete services for manufacturing outdoor building products, especially PVC windows and sliding doors. Products and services include complete extrusion lines with either single- or twin-screw extruders, all necessary take-off equipment, complete extrusion dies and calibrators, plus complete engineering designs for windows and doors.

ER-WE-PA USA LTD.

Company designs and manufacturers machinery for extrusion coating, cast film, sheet, and coating and laminating. These product markets require machinery systems adaptable to a broad range of products. Systems are developed by applying experience and process knowledge in areas of extrusion, priming, drying, treating, coating, and lamination; and web handling of light-to-heavy materials is used in the design of each system. Lines are supplied to achieve various functions, including wet and dry lamination, coextrusion barrier coating, extrusion coating or laminating, printing, and siliconization.

Coextrusion may consist of two or more layers joined prior to a single-slot extrusion die or a multislot extrusion die having individual and separate feed channels. Higher levels include skin-layer coextrusion using feedblock technology, and dies with automatic die-gap adjustments with integrated thickness measurement and control.

EGAN MACHINERY DIV.

JOHN BROWN, INC.

Specializes in high-capacity extrusion lines for blown or cast film, sheet, foam, extrusion coating, compounding, and reclaim. Cast film lines produce trim widths up to 160 in. wide at speeds up to 2000 ft/min. Johnson sheet dies are made by Egan. Flex Lip dies are available up to 160 in. wide for both monolayer and coextruded film and sheet. Lines for foam sheet extrusion up to 1500 lb/hr are available. High-speed coating and laminating lines are offered for a wide range of products. Other products include compounding lines with underwater pelletizers, reclaim systems for reprocessing a broad range of low-bulk-density material, standardized Powerflight single-screw extruders up to 6-in. diam., and custom extruders to 18 in. CMR microprocessor control systems are available for single or multiple line control on new systems or as retrofits on existing lines.

New from company: "Standard" extruders and sheet systems that will complement its traditional customized product offerings. Both lines are said to incorporate proven, high-quality design features available on its custom extrusion equipment at a cost savings of 10-20%, and delivery times four to six weeks shorter than for custom units. Sheet lines are available in widths from 20-66 in. A new line of twin-screw compounding extruders comes in co-rotating models with segmented screws.

ENTWISTLE CO.

Single-screw extruders are available in three models in sizes from 3/4- to 6-in. Available products include:

* Heavy-duty Thermoflite machines in 2-, 2 1/2-, 3 1/2-, 4 1/2-, and 6-in. diam. from 15:1 to 30:1 L/D.

* Lighter-duty extruders in diameters of 3/4, 1, 1 1/4, 1 1/2, and 2 in., and up to 30:1 L/D.

* Vertical extruders from coextrusion, tubing and small profiles, ranging from 3/4- to 2 1/2-in. diam. and up to 30:1 L/D.

* Complete single- and multilayer sheet lines with rolls from 15 to 42 in. and wider.

EXTRUSION SERVICES, INC.

Offers profile and tubing turnkey extrusion lines, including tooling, sizing, cooling, pulling, fabrication, cut-off and wind-up, designed to customer specifications. Lines can be new or retooled and retrofitted. Specializes in on-line automation of the fabrication process with Accupunch and Accustep Fabrication. (See data sheets pp. 222-225.)

FARREL CORP.

Product line consists of custom-designed, heavy-duty single-screw extruders for plastic densification and homogenizing and extruding in strip, strand or pelletized form. Company specializes in larger machines, up to 26-in. diam., for production rates as high as 50,000 lb/hr. Available units include hotmelt extruders, cold-feed extruders, and machines for receiving the discharge from batch or continuous mixers. Underwater pelletizers for LDPE, HDPE, LLDPE, PP, PS, ABS, masterbatch compounds and plastic blends are optional.

FILMASTER INC.

Specializes in complete blown film lines for monolayer extrusion and co-extrusion. Single-screw extruders are manufactured for blown film, cast film and blow molding. Individual line components are engineered and manufactured to specifications, including smooth bore extruders, grooved-feed-throat extruders, manual screenchangers, blown film die assemblies (1 to 90 in.), air rings, take-offs, slitting equipment, automatic high-speed winding systems (turret, surface, and specialty applications), and a complete line of auxiliary machinery and replacement parts.

New items, such as the post-air-ring cooling chamber, air-flotation bubble collapsing, A-frame, and ultrasonic lay-flat-width control, are easily retrofittable to existing extrusion lines for productivity enhancement. Narrow-tubing blown film lines and double-bubble lines are also available. All machinery and control systems are designed and manufactured at company headquarters in Fairfield, N.J. (See ad p. 206.)

FUTURE DESIGN INC.

Supplies complete blown film extrusion lines for LDPE and HDPE, including modular parts such as screws, screenchangers, oscillators, low-pressure dies, top nip assemblies, winders, bubble sizing equipment, extruders and control panels. Provides engineering, planning and service to blown film processors.

Also supplies Saturn dual-lip, low-pressure air rings (the smallest, Saturn Mini for 1/2-in. dies and the largest, Saturn VII for up to 100-in. blown film dies); and Saturn 100, made for HMW-HDPE stationary dies 1 in. and up.

GENCA DIV.

PENN CENTRAL CORP.

Offers a complete line of extrusion crossheads for single-, dual-, and triple-layer extrusions with striping for wire and cable, medical tubing, hose, pipe and profiles. To complement the cross-head product line, company designs and manufactures a complete line of vertical piggyback and horizontal extruders from 3/4- to 2 1/2-in. with standard 24:1 L/Ds. Complete extrusion lines are offered for fluoropolymer and thermoplastic extrusion of wire and cable, and medical tubing.

GLACIER MACHINERY SALES CORP.

Provides complete systems for profiles and blown film, including single-screw and parallel twin-screw extruders to over 6-in. diam. Extruders are manufactured by Carvalho e Catarro Lda., which supplies downstream equipment, including winders, rollers, nips, cut-offs, vacuum tanks, air rings, towers, corrugators and dies. Coextrusion technology is available. Used extruders and downstream equipment also are offered.

G.F. GOODMAN & SON, INC.

Provides a complete line of post-extrusion machinery for plastic tubing and profiles to 4 in. OD. Included are vacuum calibration tanks and tables, spray and immersion cooling tanks, d-c driven and a-c brushless servo-driven caterpillar haul-offs, vacuum clutch/brake on-demand cutters, traveling saws, a-c brushless servo-driven flywheel cutters, cuff-detection systems for cutting corrugated tubing, medical tubing cutter, discharge conveyors, blow-off and sweep conveyors and dump tables. Complete extrusion lines can also be supplied.

ROBERT GREGORY ASSOCIATES, INC.

Offers custom-designed single-screw extruders, screws for single-and-twin extruders, and dies, and engineering and consulting services to review extrusion-oriented processes and update existing systems. Process technology for compounding, blown and cast film, foam, and sheet production is also available. Screw-design technology includes single screws for extrusion and injection molding, as well as twin screws for compounding and converting.

HPM CORP.

Company's single-screw extruders range in diam. from 2 to 10 in. with L/D ratios of 24:1, 30:1, and 38:1. Nonvented and vented units are available for normal and high-torque applications. Company's specially designed screws, including its patented Double-Wave screw, are reportedly geared to high-performance processing. Double-vented extruders are said to improve processing of hygroscopic resins. Complete lines are offered for sheet extrusion, pipe, profiles, compounding, and scrap reclaim, including options for coextrusion, foam-core, and foamed processes. Tooling is offered for sheet, pipe, strand, strip, and blown film.

HAAKE/FISONS INSTRUMENTS

Laboratory and pilot-plant extruders for compounding and general use are available in 3/4-in. diam. with 10:1 to 30:1 L/D ratios for both thermoplastics, thermosets and elastomers. Company offers a counterrotating, conical twin-screw machine capable for extruding PVC at a rate of 24 lb/hr. All systems can be driven by Haake Rheocord Torque rheometers.

HARREL, INC.

Manufactures a complete line of small-to-medium extruders (to 2 1/2 in.) that feature rugged construction, digital drives (accurate to 0.001%), and Digi-panel microprocessor control panels. Also manufactures a line called Geartruders: a combination of an extruder, high-precision polymer gear pump, digital drive, and Digipanel microprocessor controller, which coordinates the operation of both extruder and gear pump in an integrated system.

A complete line of instrumentation systems are available: Digipanel micro-processor controllers, nuclear thickness gauges, and laser gauging systems. Other extrusion accessories include melt pumps, weigh feeders, and a unique Rollerpuller. Company integrates these elements into complete, prepackaged extrusion systems for tubing or profile. Its patented Tubetrol system controls both the outside and inside diameter of tubing or pipe of any size.

HARTIG PLASTICS MACHINERY DIV.

SOMERSET TECHNOLOGIES, INC.

Supplies standard and custom designed single-screw extruders ranging in screw diameter from 3/4- to 15-in. and in screw diameter from 3/4- to 15-in. and in variable L/D ratios depending upon application requirements. Extruders are equipped with heavy-duty gear reducers with change gears, high-capacity thrust bearings, and heating and cooling systems. In-house screw manufacturing and design are available for all thermoplastic materials such as polyester, nylon, PP, HDPE, LLDPE and others.

Also available in a proprietary reclaim system for hard-to-feed, low-bulk-density materials, as well as downstream equipment for special applications. Four sizes have special throat and feed capabilities for film scrap, fiber, foam and other hard-to-feed materials. A complete laboratory is available for in-house testing and demonstration.

HITACHI ZOSEN TRADING & MFG. CO.

Offers two lines of Japanese single-screw extruders: a general-purpose line from 45- to 200-mm diam., and a shorter-barrelled line for polyolefins, from 50- to 120-mm diam. In addition, HZTM supplies counterrotating twin-screw extruders for PVC (cylindrical-barrel type) in sizes from 55- to 160-mm diam., and corotating twin-screw kneaders for compounding in 53- to 200-mm diam.

Various accessories, gear pumps, and controls are offered, as well as complete lines for thin or thick sheet, blown film, mono- or biaxially oriented cast film, pipe, and pelletizing (including film-scrap repelletizing). A specialty is systems for optical-quality clear sheet.

INSTAMELT SYSTEMS

Manufactures a unique "screwless" extruder with a smooth rotor housed in a short eccentrically bored barrel. Material passes around the circumference of the rotor and then exits the barrel into a gear pump and from there through a die. Company's extruders have processed a wide range of virgin and reground thermoplastics at rates of 300 to 2000 lb/hr. The same unit can run materials of a wide melt-flow range. Significantly short residence time and energy savings, relative to a standard single-screw extruder, are claimed.

ITALIAN TRADE COMMISSION

Office has information and catalogues on Italian extrusion and coextrusion lines for tubes, pipes, profiles, film, sheets, filaments, straps, tapes, pelletizing, and cable coating for thermoplastics and rubber. Single- or twin-screw extruders are made by about 30 Italian companies and are available from 1- to 10-in. diam. and L/D from 12:1 to 30:1.

JSW PLASTICS MACHINERY

SUB. OF JAPAN STEEL WORKS

Builds two types of twin-rotor continuous fluxing mixers for high-intensity compounding. One is a counterrotating twin-rotor type, similar in basic concept to the Farrel Continuous Mixer; the other is a corotating twin-screw compounding extruder build under license from Krauss-Maffei. (See also Compounding, Mixing and Blending.)

K INC.

Provides extrusion equipment, including extruders, screws, dies, towers, winders, air rings, continuous screen-changers, film sealing and punching equipment, and corona treaters. Also offers resin blending equipment, scrap recycling systems, flexographic printing presses, and gear pumps.

KIEFEL INC.

Designs and manufactures blown film extrusion systems for 1-, 2-, 3-, and 5-layer film structures of HDPE, LLDPE, LDPE, EVA, Ionomer, PP, PA, EVOH and PET materials. Extruders are available in a stationary, oscillating or rotating design and can be equipped with a grooved feed barrel and decompression screw or a smooth barrel and compression screw. Sizes range from 30- to 80-mm diam.; die sizes range from 40- to 500-mm diam. Internal bubble cooling is available on die diameters of 120-500 mm. Haul-offs can be arranged in stationary, variable-height or oscillating design. Surface winders can be supplied in a stationary, oscillating, or rotating design. Operation of winders can be semi-automatic or fully automatic. Haul-offs and winders are available with maximum layflat widths of 500-300 mm. Various accessory equipment is available, such as blenders, loaders, treaters, web guides, gravimetric gauge-control systems, and layflat width-control systems.

Company specializes in supplying complete systems for extruding thin-gauge, single- or multilayer HMW-HDPE film at high outputs, with reportedly excellent film strength and uniform film thickness or roll quality.

KILLION EXTRUDERS, INC.

Manufactures single-screw extruders with screw sizes ranging from 3/4- to 2 1/2-in. diam. and L/Ds up to 36:1. A broad range of downstream equipment is available. Complete extrusion systems for tubing, wire coating, blown film, pipe, sheet, profiles, filaments, coextrusion, pelletizing, and other applications are offered. Complete laboratory setups can also be supplied.

Company tailors equipment to meet specific applications and also designs and builds custom extrusion equipment within its size range, and places special emphasis on coextrusion systems and medical tubing systems. Also provides a wide range of extrusion-related services, including process laboratory facilities and educational training programs. (See ad p. 208.)

KOBE STEEL  AMERICA INC.

Builds in Japan twin-rotor continuous mixers based on Farrel technology, as well as corotating and counterrotating twin-screw extruders with segmented screws and barrels in sizes from 37- to 200-mm diam. NEXT-T series of two-stage continuous compounders consist of a twin-rotor mixer mounted above a single- or twin-screw discharge extruder.

KRAUSS-MAFFEI CORP.

PLASTICS MACHINERY DIV.

Offers a complete range of counter-rotating, twin-screw extruders in double-conical and parallel-screw configuration for PVC extrusion. High-inventory pipe tooling and coextrusion blocks for siding, capstocking and dies, and calibrators for semi-sheet and post-formed siding extrusion, including down-stream, are available. A special version of the double-conical extruder series is available to serve as a satellite extruder or for triple-layer foam-core pipe.

Machines are controlled by either auto-tuned, microprocessor-based temperature controller and programmable controller in lieu of relay functions, or complete microprocessor controls.

Company has teamed up with Actual Plastics Technology to offer complete systems for PVC window manufacturing.

KUHNE GMBH See O/K International.

LUWA CORP.

Supplies full range of specialized processing machines and systems, gear pumps, microprocessor controls, motionless mixers and systems for continuous processing of highly viscous polymers. Transported thin-film processing systems are supplied for concentrating and devolatilizing, polymerization and polycondensation, demonomerizing and finishing, and recovery of solvent and polymer from waste streams. Benefits reportedly include lower volatile levels, polymer quality preservation, and energy efficiency.

Positive-displacement gear pumps and complete pumping systems are available for handling viscous materials up to 30 million cp. Specialty extrusion gear pumps offered are said to improve dimensional control of products, increase capacity on new or existing lines, regulate extrudate to prevent surges, and reduce energy consumption.

Motionless mixers blend high-viscosity materials thoroughly and improve thermal homogenization. Extrusion microprocessor systems for complete gravimetric extrusion control, gauging systems, pump and temperature control and complete pilot-plant engineering and start-up services are also available.

MPM POLYMER SYSTEMS, INC.

Offers a complete line of custom-designed and standard extruders and downstream equipment for film sheet, profile, and fibers. Extruders range from lab scale up to 8-in. diam. production sizes and include all accessories plus a line of computer-designed single- and multilayer flat and blown film dies. Complete in-house engineering and machine shop facilities are available.

MACRO ENGINEERING CO., LTD.

Designs and manufactures complete blown film systems for LDPE, LLDPE, and HDPE, including single-screw extruders, material-blending and scrap-recovery systems, together with secondary cooling systems, PTFE collapsing frames, winders, and other downstream equipment for packaging applications. The company also offers custom equipment for processing new or difficult-to-process resins.

MCNEIL AKRON, INC.

Manufactures a complete line of extruders and downstream equipment. Available extruders include twin-screw types from 2.5 to 4.5 in. and single-screw types from 1.5 to 8 in. Downstream equipment is manufactured for pipe, profile, and sheet. Custom-designed systems are available. Company states that it provides true turnkey responsibility because it manufactures all processing equipment needed. Product line includes extrusion heads, calibration equipment, cooling tanks, pullers/ haul-offs, saws, belling machines, roll polishing stands, and high-intensity mixers for PVC compounding.

MERRITT EXTRUDER CORP.

Offers single-screw extruders from 1 in. through 8 in., as well as complete systems for blown film, reclaim, cast film, sheet, wire and cable, and fiber optics. (See also Compounding, Mixing, Blending Systems.)

MITSUBISHI HEAVY INDUSTRIES

Company supplies, directly from Japan, monolayer and multilayer cast film and biaxial orientation lines with die widths up to 4500 mm. In addition, the firm offers standard single-screw extruders in 65- to 250-mm diam., special single-screw mixing section) of 50-135 mm, tandem single-screw systems from 90/115 to 220/275 mm, counterrotating, conical twin-screw extruders for PVC in 50 mm and 60 mm, and corotating twin-screw compounders from 45-125 mm. (See also Compounding, Mixing, Blending.)

MORRISON ENGINEERING

& MANUFACTURING, INC.

Manufactures plastic process equipment, including lab-size and production-size, bench- and floor-mounted, horizontal and vertical extruders. Color compounding, wire and cable, monofilament, medical tubing, straw and aerosol-tube lines are available.

Product line includes process equipment capable of handling fine wire through large jacketed conductors, and includes auxiliary handling equipment, such as rewind/inspection/cut-to-length lines with PC and CRT electronic control systems to simple lines for less rigorous requirements.

NRM-STEELASTIC

Designs and manufactures complete extrusion systems for foam, solid and coextruded sheet, film, pipe, profile and continuous extrusion blow molding.

Pacemaker IV thermoplastic extruder is available in 2 1/2- and 3 1/2-in.-diam. screws with standard L/D ratios of 24:1, 30:1 and 32:1. Microprocessor-based controls are now standard, using Sentry Pro 1001, which provides centralized, totally integrated control and monitoring of all product and process parameters. Standard sizes range up to 8 in. with L/Ds to 38:1 (designs available to 15 in. and 50:1 L/D). Features also include aircraft-quality, case-hardened gearing, double-reduction gearbox, and new-generation d-c scr digital drives.

Pacemaker III thermoplastic extruder is available in 3 1/2-, 4 1/2-, 6 and 8-in.-diam. screws with standard L/D ratios of 24:1, 32:1 and 36:1. Extruders feature new "cold-start" protection, including a soak timer, new Sentry Pro 1001 microprocessor-based controls, individual-zone circuit breakers and d-c scr drives with compact power unit. All components are mounted on a single base and completely wired, requiring only utility connections.

Acculayer 2000 is a versatile sheet line designed for wider ranges of materials and processes. It features standard PLC-based alarm system, computer-compatible instrumentation, quick roll change, four-speed transmission and convenience outlets. It has 3-in. conveyor rolls, 800 PLI nip pressure and 36-144 in. finished sheet widths.

Company also provides complete turnkey extrusion systems with extruder and downline equipment, as well as total microprocessor control systems, including sheet and film-gauge inspection systems. Total reclaim systems, spare parts, feed screws, screw design and extruder remanufacturing services are also available. (See also Total Machine Control Systems.)

NEW CASTLE INDUSTRIES, INC.

Offers a line of add-on coextruders for all types of thermoplastic coextrusion. Sizes range from 1- to 3 1/2-in. with most L/Ds available. Either an electric or hydraulic drive is available depending on requirements. Custom features are emphasized, such as designs for restricted spaces, multi-axis movement, special controls, and high-performance screws.

Company supplies custom reclaim extruders up to 8 in. using dual-diameter extruders and/or hopper crammers, depending on the feed material. Both new systems and retrofit of existing extruders are offered.

NOKIA-MAILLEFER, INC.

Offers manual and microprocessor-controlled wire and cable, fiber-optic, and plastic tubing extrusion systems, which include dual flyer pay-offs, pay-off stands, BM Series single-screw extruders, fixed and manual centering cross-heads, entry/exit caterpillars and capstans, multipass cooling troughs, vacuum calibration troughs, single and dual automatic take-ups, take-up stands, and cabling machinery. Line options include diameter, capacitance, temperature, elongation and synchronization control systems.

NORMAG CORP.

Manufactures complete gear pump systems for extrusion, including pumps, controls, and drives. Also available are in-line mixing units for extrusion, particularly for color additives. Company also manufactures continuous- and noncontinuous slide screenchangers for extrusion filtration.

O/K INTERNATIONAL CORP.

Company is a full-service distributor of complete extrusion lines for blown film, sheet, and cable from Kuhne GmbH of West Germany. Single-screw extruders up to 5 in. provide output of as much as 800 lb/hr, plus complete downstream equipment, including dies, air rings, high-speed winders, towers, cutters, cooling rolls, and corona treaters.

Kuhne's HDPE blown film lines feature a 24:1 L/D and optional Turbo Cool IBC System. Turbo Cool has an externally adjustable internal stabilizer, which allows size changes without interrupting production.

Kuhne sheet lines are designed for production of flat films and sheet of PE, soft PVC, ABS, acrylic, TPU, and filled materials.

OLYMPIA TOOL AND MACHINE CO.

Single-screw extruders are available in the following sizes: 3/4-, 1-, 1 1/4-, 1 1/2-, 1 3/4-, 2-, 2 1/2-, 3 1/2-, 4 1/2-, and 6-in. diam.; L/D ratios available are 20:1, 24:1, and 30:1. Features include extra-large-capacity thrust bearings, flame-hardened or Stellite alloy-steel screws, heavy-duty gear transmissions, and control panels in keeping with JIC type standards.

P.J. SOFTWARE, INC.

Taiwanese blown film, bagmaking and printing systems are represented in North America. A broad line of blown film systems from Queens Machinery Co., Ltd. includes several series of standard and compact lines for HMW-HDPE, LLDPE and LDPE. They utilize 30-65 mm, 25-26:1, air-cooled extruders rated for outputs of 40-330 lb/hr, and can include such features as grooved barrels, nitrided mixing screws, low-pressure 360 [degrees] rotating dies (standard on some lines), dual-lip air ring, PTFE sizing ring, internal bubble stabilizer, and auto-roll loading. Auxiliary equipment includes the company's line of corona treaters, bag machines, and two- to six-color flexo printers.

Company also offers downward-extruding, water-bath-type PP blown film lines for 40-132 lb/hr.

PARAMCO INC.

Offers polymer gear-pump systems, including special adapters for the extruder side and the die side. Pump systems and adapters are supplied for extruders from 1-in. through 12-in. diam., including both single- and twin-screw.

PECO, INC.

Offers small lab extruders for blown film and pipe, and also complete single-screw extrusion systems (1 3/4-in. to 2 1/2-in. diam.) and auxiliary equipment systems for PE blown film.

PENN CENTRAL CORP. See Genca Div.

PHILLIPS SCIENTIFIC CO., INC.

A custom builder offering hydraulic or pneumatic-powered ram extruders. Machines are available in vertical or horizontal format and are designed to extrude presintered, granular ITFE, UHMW-PE, and thermosets. Machines can supply 24-hr/day continuous, unsupervised manufacturing of rod, bar, tubing, custom profile extrusions and T-seals; and are user-designed for turnkey startup, unattended operation and easy maintenance. Multiple-cavity extrusion die technology is available.

Company also offers a PTFE paste extruder for producing micro-capillary tubing. The machine is capable of producing tubing with 0.002-in. to 0.006-in. wall and maximum O.D. of 0.5 in., using interchangeable barrel sizes. Typically, the paste extruder is designed as part of a turnkey system.

PLACO CO., LTD.

Imports from Japan single-screw extruders from 1/4-in. to 8-in. diam. and complete blown film systems for all types of polyethylenes and for coextrusion of up to five layers. Twin-head lines with single-or multilayer capability are available, as well as bagmaking equipment.

PLASTICS EQUIPMENT MARKETING

SERVICES

Offers production and lab scale extrusion systems for blown film, sheet, profiles, pipe, and compounding. Extruders are supplied in 1/2-in. to 6-in. diam. Also included are complete downstream peripherals.

POLYSYSTEM INTERNATIONAL INC.

Produces blown film dies, air rings, IBC systems and extruders, specializing in LDPE and LLDPE.

POMINI, INC.

Italian-based firm with facilities in Cleveland, offers a variety of single-screw extruders both hot- and cold-feed to be used as mixer-fed or reactor-fed compounding extruders:

* Hot-feed extruder: Machine is suitable to receiving the material from reactors and delivering it in pelletized form. Range is 12 to 16 in. with maximum throughout of 30,000 lb/hr.

* Cold-feed extruder. Machine is generally cube- or pellet-fed. Range is from 6 to 15 in. with maximum throughput of 10,000 lb/hr.

*Mixer-fed extruder: This type of extruder is located under the LCM continuous mixer or under an internal mixer. The main task is to create a pressure gradient to pump the material through a die to pelletize. Range is 2 to 20 in. with maximum throughput of 50,000 lb/hr.

All extruders can be equipped with different types of extruder heads/pelletizers in three versions: underwater, water-ring, dry-face or strand head.

PRIORITY MACHINERY

Single-screw extruders in sizes from 28 to 90 mm, with complete downstream equipment for pipe, profile, straws and sheet are supplied from Virginio Mai of Italy. Main emphasis is on profile and straws, including coextrusion systems. Also available are corrugators for tubing, hose and pipe from Olmas of Italy and coilers for tubing from Calini of Italy.

PROCESSING TECHNOLOGIES, INC.

PTI designs and manufactures custom processing machinery. Products include: single-screw extruders 3 1/2-in. to 12-in.); complete sheet and film production lines; compounding lines; biaxial sheet production lines; reclaim lines and pelletizing lines.

On an individual basis, company offers polymer gear-pump system; heavyduty crammer feeders; sheet and film takeoff systems; pelletizers; machine-direction and transverse-direction orientators; coating systems; winding systems; slitting systems; control systems; heating and temperature-control systems; screenchangers; and a host of ancillary products.

PTI offers remanufactured equipment, including single- and twin-screw extruders; sheet and film takeoff systems; reclaim lines; pelletizers; and winders. Both new and remanufactured equipment are covered by the same comprehensive warranty.

PURNELL INTERNATIONAL

Offered from Battenfeld Extrusionstechnik GmbH for PVC compounding are planetary-roller extruders and two-stage extruders with a planetary-roller first stage and single-screw discharge.

R.D.N. MANUFACTURING CO., INC.

Offers a line of post-extrusion equipment for production of pipe, tubing and profile. Individual components include dies, vacuum sizers, water baths, air tables, belt pullers, wheel pullers, embossers, traveling saws, fly-knife cutters, on-demand cutters, and dump tables. Complete turnkey lines with die development and operator training are also available.

RPM EXTRUSION DIV.

THE BOULIGNY CO.

Manufactures complete slit-tape and monofilament extrusion systems based on single-screw extruders. Slit tape can be produced at a rate of 2000 lb/hr or faster and monofilament at 800 lb/hr and above. Auxiliary equipment offered with the systems includes ovens, quench tanks, chill rolls, slitters and takeaways, fibrillators, winders and spoolers.

RANDCASTLE EXTRUSION SYSTEMS

Offers two lines of extruders:

* Microtruder: Designed for bench-top (20 x 24 in. base) research applications, polymer synthesis, quality control and low-output production. Interchangeable 1/4-, 1/2-, 5/8-in. barrels on the same transmission and using the same control panel offer typical outputs of 10-168, 82-1435, and 168-2040 g/hr respectively. Proprietary design allows feeding of low-bulk-density powders or pellets. Screw design offers better scale-up and mixing, with typical shear rates of 152 [sec.sup.-1] at 100 rpm. Complete systems are available for film, sheet, devolatilization, compounding/ pelletizing and 7-layer coextrusion. Lab services are also available.

* Flextruder: 0.75- to 1.250-in. diam. Typical maximum outputs are 2 to 56 lb/hr. Proprietary line features grooved feed sections of superior feeding of difficult feedstocks including powders, granulates, and lubricious materials. Complete systems include seven-layer coextrusion of film and sheet, feedblocks, and compounding/pelletizing. Lab services are available.

REIFENHAUSER-VAN DORN CO.

Provides its own single- and twin-screw extruders together with complete systems for blown film, cast film, single- and multilayer sheet, monofilament and coating. Single-screw extruders are available in sizes from 1 to 10 in., twin-screws from 2.16 to 5.6 in. Vented and nonvented types are available. Temperature-controlled feed throats are standard. Fluted feed throat is available for single-screw models. All machines feature ease of access to gears and thrust bearings.

Company also provides a wide range of reclaim systems that repelletize up to 2000 lb/hr. The "Erema" system is a complete system and features a patented "warm-feed" system of predensifying and shredding material prior to the extruder. This method minimizes heat input, resulting in extremely low degradation of the reclaimed material.

ROYLE SYSTEMS GROUP

JOHN ROYLE & SONS

Supplies single-screw extrusion systems for handling thermoplastics and thermosets in the wire and cable industry. Wire-coating lines come with extruders from 1- to 8 1/2-in. diam. Accessories include single-reel payoffs and takeups (12- to 120-in. diam.), dual-reel takeups, water troughs, dual-wheel and belt-wrap capstans (16- to 96-in. diam.), continuous-belt linear captans, cable accumulators (15- to 72-in. diam. sheaves), continuous steam and gas vulcanizing pressure tubes, heat exchangers, air wipers, vertical extruders and dual extrusion heads. Extruders for rubber are available in sizes up to 12-in. diam.

SANO INC.

A CINCINNATI MILACRON CO.

Specializes in extrusion systems for blown, cast, and/or cast/embossed film in widths from 20 in. to 20 ft and speeds up to 1500 ft/min. Single- and multilayer spiral-die assemblies (diam. up to 48 in.) are offered for up to five layers. Noncontact internal bubble cooling systems are available, in addition to high-output air-cooling rings suitable for 1.3:1 to 5:1 BUR and film thicknesses of 0.3 to 10 mils. Single-screw extruders have typical diam. of 2 1/2, 3 1/2, 4 1/2, 6 and 8 in. with standard L/Ds of 24:1 to 34:1. In-between sizes of 50, 75, 100, 130 and 165 mm are also available.

Company also supplies automatic winding equipment with in-line slitting, automatic web transfer and handling, web widths up to 160 in., and roll diameters up to 60 in. Turnkey, custom-engineered film extrusion systems and line components are also provided.

Company now offers microprocessor control systems built by Cincinnati Milacron, as well as those systems offered by control systems companies.

Company has entered the sheet systems business with lines based on the new Cincinnati Milacron Apex single-screw extruders and Sano's new three-roll cooling/polishing stacks. The latter offer automatic roll-gap adjustment with digital indication of nip opening, brushless d-c drives, and a split pivot lever arm designed for high closing forces.

Also new from Sano are computer systems for total line supervision in film and sheet extrusion. Based on Milacron hardware and both Milacron and Sano software, these Optec systems have a color graphics CRT, and full SPC/SQC reporting and trending. Integrated recipe management ties in temperature profile, blender rates, gravimetric feed rates, and gauge control.

SENTINEL MACHINERY

Complete extrusion lines for sheet extrusion of PS foam, PE, PP, and PET are manufactured. Single-screw extruders come in 1- to 6-in. diameters, and downstream equipment includes dies, feedblocks, controls, cooling rolls, and winders.

STEELASTIC See NRM-Steelastic.

STERLING DIV.

DAVIS-STANDARD

Company manufactures complete systems that include single-screw extruders up to 15-in. diam. and downstream equipment for blown and cast film, sheet, laminations, pipe, profile, fibers and compounding. Conventional compounding and underwater pelletizing lines are offered, as well as the Dow feedblock for multiple-layer structures, and other coextrusion equipment for sheet and blown film. Company markets special-purpose extruders, vertical extruders, screenchangers, and other special, custom-designed equipment.

SUPERIOR PLASTICS MACHINERY

Single-screw extruders are supplied in 1 1/2- through 8-in. sizes for cast and blown film, sheet, coating, profile, compounding and sheet orienting. High-boy and low-boy mountings are offered as well as custom designs. Whole lines and components are offered: hoppers, stuffers, screenchangers, film and sheet dies, air rings, oscillating nips, winders, unwinds, cutters and pullers.

TECHLINE EXTRUSION SYSTEMS

Specializes in the design and manufacture of complete extrusion systems for blown film (widths 10- to 160-in.) for LDPE, LLDPE and HDPE as well as up to 5-layer coextrusion systems. Equipment line components, custom engineered and manufactured to individual specifications, include single-screw extruders (for blown film, cast film, blow molding, and profile extrusion) in typical diameters of 2-, 2 1/2-, 3 1/2-, and 4 1/2-in.; manual screenchangers; screws; single-layer and multilayer spiral blown film die assemblies with diameters up to 60 in.; internal bubble-cooling systems and high-output dual-lip air-cooling rings; rotators; take-off nip assemblies; high-speed automatic surface and turret winding systems specifically custom engineered with inline slitting, web widths up to 160 in., and roll diameters up to 60 in.; fixed or adjustable towers; control panels; film treaters; post gusseters; and any additional related auxiliary equipment/replacement parts.

All equipment, standard or custom designed, is engineered and manufactured at company's Haskell, N.J., facility. As a standard service, the company provides custom engineering, updating, and planning services.

TEX AMERICA, INC.

Represents Bausano of Italy, supplying parallel twin-screw extruders and complete systems for rigid PVC profiles and pipe (including corrugated) up to 730 mm diam., as well as HDPE pipe up to 450 mm diam. Also available are PVC pelletizing lines and systems for extruding "Polywood" sheet of thermoplastic mixed with wood flour.

THERMOPLASTIC ENGINEERING

CORP. (TEC)

Designed and builds durable extrusion and coextrusion capital machinery for wire and cable, fiber optics, profiles, industrial/medical tubing and compounding/pelletizing.

Extruders range from 3/4- to 2 1/2-in. vertical and 3/4- to 6-in. horizontal. Cast feed sections are all designed for large cooling flow rates and easy feed characteristics for pellets or powders. Feed screws are custom designed. Thrust bearings are all rated for over 10 years of working life. Special L/Ds and high-temperature machines are available.

Upstream equipment includes payoffs with 16- to 72-in. reel capacity, dancer/accumulators, concentric tape dispensers and fiber binding heads. Downstream equipment includes water troughs for heating or cooling (or both), capstans (wet and dry), takeups (dual or single reel), coilers, water strippers, pelletizers, strand dies and pinch rollers. Company also offers off-line components such as respoolers, single- and double-twist cablers, quadders, stripers and rotating takeups.

Company can design and set up full production lines such as fiber-optic buffing lines, cablers and pelletizing lines. New processing equipment ideas can be brought from the customer to the assembly floor. All components and systems are set up and tested prior to shipment. Customers are encouraged to attend and supervise startups.

TOMI MACHINERY MFG. CO., LTD.

Supplies blown film systems with extruders of 40-125 mm diam. and die diam. of 20-1200 mm. Conventional upward-extruding versions with rotating dies and air rings, and downward-extruding, water-bath systems are provided, along with optional coextrusion capability, automatic roll changing, computer controls, printers, slit-sealers, corona treaters, and bag makers. Extrusion laminating systems are also available.

TOSHIBA MACHINE CO., AMERICA

Corotating twin screws for compounding, devolatilizing and reactive extrusion are supplied in sizes from 50 to 160 mm, all with segmented screw and barrel. Likewise equipped are counter-rotating twin-screw compounders of 75 and 95 mm. Also offered are a 55-mm conical twin-screw for PVC and single-screw extruders of 65- to 300-mm diam. and 25-36:1 L/D, as well as complete downstream systems for cast film, biaxially-oriented flat film, sheet (including coextruded and embossed types), PS foam sheet, integrated sheet extrusion and thermoforming, pipe, and pelletizing. In addition, automatic die control for flat webs in available.

VIDEX MACHINERY CORP.

Sells rebuilt and guaranteed extrusion systems for pipe/profile, sheet, blown/cast film, compounding/scrap reclaim, and wire and cable. Sizes range from 3/4- to 12-in. All equipment and systems can be test run for customer's final inspection and acceptance. Accessory equipment such as screenchangers, vacuum pumps, screws, and materials-handling equipment is offered.

W.M.D. MACHINERY CO.

Offers Prandi "Double-Bubble" systems for extrusion and coextrusion of blown bi-oriented films, PP, PET, nylon, barrier, heat shrinkable and other films in various structures up to seven layers.

Also offers Prandi systems for extrusion and coextrusion of cast nonoriented and mono-oriented films, PP, PE, nylon and others in various structures.

Omicron extrusion and coextrusion systems are available for blown, non-oriented films, LDPE, HDPE, PE, EVA PC and others in 2, 3, and 5 layers.

WARNER SALES ASSOCIATES, INC.

Offers complete blown film extrusion lines with 45- to 120-mm extruders for LLDPE, LDPE, HDPE and coextrusion. Weigh blenders, color feeders, trim feedback, grinders and repelletizers are available, along with film sealing machines for post gusseting and slit sealing, sideweld, bottom seal, twin seal, sine wave, and "T-shirt" bags.

WAYNE MACHINE & DIE CO.

Company's Yellow Jacket line of single-screw extruders ranges from 3/4- to 4 1/2-in. with L/D up to 36:1. Twin-screw extruders, corotating and counter-rotating, are supplied up to 170 mm. Horizontal, vertical, and coextrusion models are available. Complete systems are engineered for production of tubing, sheet, rod, wire, blown film and cast film with optional microprocessor control. Complete coextrusion systems are also available. Sheet take-offs are 8 to 24 in. wide, and pelletizers come in 2-, 4-, and 6-in. sizes. New and rebuilt screws and barrels for extrusion and injection molding are supplied from 1/4 in. to 6 in.

WELDING ENGINEERS, INC.

Offers counterrotating, nonintermeshing twin-screw extruders for compounding, devolatilization, reactive extrusion, latex conversion, rubber dewatering and drying. (See also Compounding, Mixing and Blending.)

WELEX INC.

Company supplies high-performance single-screw extruders with herring-bone change-gear reducers. Screw diameters range from 1 1/4 to 12 in. and L/Ds from 24:1 to 40:1. All machines have bimetallic cylinders and Colmonoy-surfaced screws. Vented and nonvented machines are offered. Extruders with 36-40:1 L/D ratios include patented double venting for removal of high volatile levels. All machines include fully prewired drives and controls for single-power-drop installation. Closed-loop liquid cooling and full instrumentation are standard equipment. Complete microprocessor and full computer controls are available.

Company specializes in complete sheet extrusion and compounding systems. A complete line of specialized coextrusion systems for multilayer sheet that reportedly can be fitted to any line is available. Overhead-mounted extruders from 1 1/4- to 4 1/2-in. diam. are offered for this purpose, with modular feedblocks for making from 2 to 15 layers. Integral gear-pump system for more precise extrusion is provided with most extruders.

WERCO, INC.

Sells a line of small single-screw coextruders with screw diameters from 3/4 to 2 1/2 in. Coextruders are pedestal or turret-mounted. Cooling fins and blowers to control temperature are standard. Custom auxiliary equipment is offered.

WERNER & PFLEIDERER CORP.

Twin-screw compounding extruders are modular so that barrel and screw sections can be modified to suit particular processing requirements such as melting, kneading, mixing, and pumping. The screws are made up of individual elements arranged on the shaft in such a way to achieve specific shear, pressure-buildup, and conveying results as required at any given location along the process length. The barrel is also made of individual sections approximately four diameters long. Different types of barrel sections are available for feeding, venting, injection of liquids, removal of volatiles, and for other processing requirements.

Available models range from lab units to high-volume systems capable of rates over 100,000 lb/hr. Systems can also be supplied for direct compounding and sheet extrusion.

WESTERN POLYMER DIV.

JOHN BROWN, INC.

Offers blown film process components and complete systems through association with Egan Machinery Co. Western Polymer itself manufactures dual-orifice air rings, low-shear dies (1-to 90-in. diam.), and barrier-type feedscrews. Dies are designed for LDPE, LLDPE, HDPE, EVOH, nylon and ionomer. Also offered are coextrusion dies with highly streamlined flow design suitable for extruding up to five layers of a wide range of degradable polymers. Company specializes in process engineering, upgrades, and production-scale coextrusion.

WILMINGTON MACHINERY

Offers single-screw extruders and extrusion systems designed for a specific single material or coextrusion application. Bore diameters range from 1 1/4 through 6 in. L/D ratios range from 20:1 to 48:1.

Computer controls with software tailored to the end user's requirements, equipment and process diagnostics, SPC and auxiliary equipment control are common to the designs. Special bases for multiple extruders and special heights and mounts are also available.

WINDMOELLER & HOELSCHER CORP.

A complete line of mono- and coextrusion blown film lines for LDPE, LLDPE, HDPE and blends in available with extruders from 2.5 to 6 in. Company's Varex generation includes internal bubble cooling, grooved-feed technology, oscillating haul-off, and precision winders.

In addition to its standard dies, ranging in diameter from 4.7 to 49 in., the company offers a wide range of sizes for its Optifil P automatic blown film die, which is available in diameters from 11 to 35 in. for monolayer films and 9 to 35 in. for three-layer films. According to the company, the Optifil P automatic die can help dramatically reduce startup times and raw-material consumption, while manufacturing high-quality films with increased flatness and minimal curvature. Additionally, the Optifil P die controls transverse-direction gauge variation automatically, producing transverse-direction tolerances approaching those in the machine direction.

To complement the Optifil P automatic die, company has introduced the Optifil Plus process-control system for blown film extrusion. Designed to regulate and monitor all product-related extrusion parameters, the system is available with varying degrees of automation systems.

ZENITH PUMPS DIV.

PARKER HANNIFIN CORP.

The Zenith gear pump can be used as both a pressure booster/stabilizer on the discharge end of an extruder and for precise additive injection into the extruder barrel. Pumps are constructed of through-hardened, high-speed tool steels or 400-series stainless for corrosion and wear resistance.