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Compounding, mixing, blending systems.

Microprocessor controls for maintaining constant flow rates, formula ratios, and final product density available for all production units. Lab test facilities and mixer loans available at nominal charges.


Gravimetric blending systems: Weigh Master handles powders, granules and pigments, in addition to nonfree-flowing materials such as talc, calcium carbonate and regrind. Weigh Master combines up to eight ingredients with accuracies on both major and minor ingredients of 0.25%. Accuracy is provided through standard or custom software packages, which can be interfaced to CIM protocol. All systems are completely SPC and SQC compatible, and can access AARON EQUIPMENT CO. DIV. OF ARECO, INC.

Ribbon and double-cone blenders in stainless and carbon steel for mixing resins and powders or colors. Double-sigma blade mixer in carbon steel available with extruder discharge. A 300-gal double-arm mixer/extruder with roller bearings and split packing glands can be directly connected to a gear reducer of up to 200 hp. Front blade speed is 30 rpm; rear blade speed is 17 rpm. The 13-in.-diam, screw is located in the bottom between the tangent point of the two half cylinders that form the bowl and is directly connected to a reversible hydraulic motor. Screw can run from 0 to 30 rpm in either direction while maintaining full torque. Unit has a 75-hp motor, pump, reservoir, and heat exchanger. Bowl and extruder housing are jacketed for steam, water, or oil heating to 100 psi at 300 F.


Mixers include Rota-Cone tumble blender, ribbon and paddle blenders, Forberg-II mixer, and sigma-blade mixers for pastes and high-viscosity mixing. Specializes in custom mixing equipment with ancillary equipment such as load cells, bag dump and dust control.

Milling equipment includes carbon-and stainless-steel and ceramic ball mills for production and laboratory applications.


Model 350 multipurpose blender for continuous mixing of dry materials features two concentrically mounted augers that operate at different speeds. Blender can coat pelletized products with lubricant or release agent, blend dry powders into masterbatches, and add lubricants or colors. Output range is 1.2 to 5100 cu ft/hr. Quick-disconnect and sanitary models available.


Blending systems for reinforced and nonreinforced liquid systems such as urethanes include storage tanks, valves and piping, weighing and blending stations, control circuitry, and material conditioning units for liquid chemicals and fillers. Tank sizes up to 30,000 gal in both mild and stainless steel. Optional electronic packages permit central monitoring and control.


Electrically heated, agitated vacuum/pressure tanks for batch heating, degassing, and mixing in sizes from 2 to 75 gal.


Blending systems for free-flowing materials include volumetric, gravimetric, batch-weigh and loss-in-weight systems. SMA, WVB and LMA volumetric blenders continuously blend materials at rates up to 5000 lb/hr/ingredient. Units can be machine-mounted or floor-mounted and blend two to six ingredients.

For more precise blending, WWB series batch-weigh blenders and WLB series weight-loss blenders have microprocessor-based controls to deliver accuracies better than 0.5 to 1%.

Will integrate blenders into complete handling systems, including pneumatic conveying, drying and storage equipment.


Represents Mixaco's mixing equipment, from universal mixers to container mixers and high-speed heating/cooling mixers.


Corotating and counterrotating twin-screw extruders and complete hot-face pelletizing lines for compounding and scrap reprocessing. Screw diameters from 18 to 135 mm for outputs from under 10 lb/hr to 8000 lb/hr. All machines are modular and have segmented screws. Universal laboratory extruder has attachments for single-screw and three twin-screw modes of operation.

Convertible 18-mm twin-screw extruders for lab and medical applications have throughputs of 1 to 15 lb/hr. Operate in corotating intermeshing and counterrotating nonintermeshing modes. Segmented barrels are electrically heated and internally cooled via air or liquid. Machine is self-contained on a roll-around frame.


Add*Too line of intensive nonfluxing blenders mount on processing equipment. Pellets use an arm design and powders a paddle design for integrating a liquid color into material flow. Units operate to 450 F and capacities to 2000 lb/hr. Adapter mounts on any machine.


Solids mixers for granular or powder compounding permit limited liquid addition (e.g., plasticizers and colorants):

* Ribbon mixer for heavy-duty mixing has counterflow action for thorough mixing in a short time. Available with heating/cooling jacket.

* Counterrotating twin-agitator system gives intensive action for blending viscous liquids with granular or powdered raw materials.

* Vertical screw mixer is recommended for blending regrind scrap with virgin pellets.


Corotating, self-wiping, twin-screw extruders with rates to 10,000 lb/hr. CP-1006 series low-torque extruder is suitable for low- to medium-viscosity materials in applications requiring temperature control; MP-2000 series for medium- to high-viscosity materials in applications requiring high free volume for higher filler loadings; HP-4000 series high-torque extruder used primarily for high-molecular-weight, high-viscosity thermoplastic compounding.

Features include segmented agitators for varying configuration, along with sectional barrels for up to 40:1 L/D. Barrel sections can be equipped with side feeders, venting systems, liquid injection ports, and barrel-valve assemblies. Process temperatures can be controlled by liquid heating and cooling media on CP-1000 units, and by electric heating and liquid cooling on MP-2000 and HP-4000 units. Control of compounding lines can be provided with relay logic or microprocessor-control with a host management package.

Ancillary components include pre-blender, feeder systems, vacuum systems, strand or underwater pelletizers, and classifying and drying systems.


Supplies homogenizers and reciprocating high-pressure pumps.


Tumble Master drum tumbler features dual-drum mixing and high production rates. Designed for continuous operation, it is constructed of heavy-gauge steel. Mixing capacity to 300 lb/drum. A 1-hp drive is standard. Timer package is offered to control mixing cycle.


Colormax equipment includes floor-mounted blenders and on-machine blenders for mixing up to five materials on top of the hopper. Mini Multi Flow blender, a compact hopper-mounted unit, blends three materials without separation.

Gravimetric Multi Weigh blender augments standard range of volumetric Multi Flow blenders. It utilizes up to eight metering modules supported on individual lead cells for simultaneous loss-in-weight control.


High-speed, high-shear continuous mixer blends solids with solids, liquids, or gases. It comes in six sizes from 8- to 30-in. diam. has adjustable shear and impact action, and may be jacketed for heating and cooling. Paddles are adjustable to vary retention time.

Nonintensive ribbon blenders for dry and dry-liquid blending have capacities of 2 to 680 cu ft and are used for mixing additives and pigments into powders and pellets. Agitator assembly with inner and outer ribbons provides gentle mixing action and is recommended especially for mixing small amounts of critical ingredients with large amounts of matrix material. Batch or continuous operation is offered.

Also supplies a unit for mixing and extruding paste and plastic materials. Unit produces a continuous mixing and kneading action on materials discharging through an orifice plate that provides size and mixing control. Unit is jacketed for heating or cooling.


Twin-screw corotating, intermeshing extruders from 1 to 12 in. for compounding, reinforcing, filling and masterbatch production. Specialty designs for melt-fed compounding, devolatilizing, and reactive extrusion.

Single-screw extruders up to 24-in. come in melt- and pellet-fed homogenizing, devolatilizing, straining, pelletizing, and specialty designs.

Single-screw, vertical/horizontal tandem extruders up to 14 in./16 in. combination for highly filled PVC and polyolefins. Specialty designs for scrap reclaim of comingled plastics.

Planetary-gear extruders for rigid and flexible PVC compounding and calender feeding reportedly provide excellent temperature control.

Multiple-screw (10 and more) extruders for high surface-area devolatilization and reactions.

Pelletizers include water-ring, underwater, and hot-die-face types.


Pelletizers and single-screw extruders, homogenizers, devolatizers and compounders in standard sizes from 2 1/2 to 20 in.


See Kobelco Stewart Boiling, Inc.


Prep Mixer, a high-shear, fluxing, intensive mixer designed for lab or pilot-plant mixing. Mixing capacity approx. 1/2 lb. Liquid or electrical heating.

Two-roll Prep Mill with 4-in. diam x 8-in. work area on the rolls is also for lab use. Roll gap adjustable from 5 to 195 mils; drive speed adjustable up to 30 rpm.

Twin-screw continuous mixer for high-shear mixing at up to 10 lb/hr has counterrotating, intermeshing 1.65-in.-diam. (42mm) screws.


Pumps for liquid metering/proportioning and systems for in-line blending of two or more liquids. Units handle pressures up to 50,000 psi and viscosities to 100,000 cp at outputs to 23,000 gal/hr.


Distributes Collin 7K-50 laboratory twin-screw extruder from Dr. Coilin GmbH of Germany. Operates counter or corotating with a single gear change. Segmented screws and barrels. Closed, vented and feed-port barrels and numerous configurations available. Screw diameter is 50 mm, processing lengths vary from 9:1 to 18:1 L/D, and max. output is 50 lb/hr. Measuring equipment and microprocessor controls optional.


Buss-Kneaders are continuous, reciprocating single-screw, intensive-fluxing units for mixing and dispersing thermoplastics and thermosets. Special profiled screw flights and rows of kneading teeth in the barrel section, plus a reciprocating screw action to provide intensive kneading. Primary applications include rigid and plasticized PVC, polyolefins, engineering plastics, master-batching, and RP blending.

Buss-Kneader continuous calender-feed systems have capacities from 40 to 15,000 lb/hr. Axial and radial mixing are said to offer exceptional plasticating, dispersing and homogenizing of polymer with additives. Processes plasticized and nonplasticized PVC and is said to give wide formulation flexibility and to be suited to feeding all calender types and sizes.

Also Waeschle Subsystems' PGM pneumatic blender for pellets and CFB Combi-Flow blender for powder and pellets. PGM blender has one internal blending tube and low energy requirements. Capacity range is 50 to 21,000 cu ft. CFB Combi-Flow blender for blending and homogenizing free-flowing materials can be retrofitted to silos with diameters from 4 to 20 ft.


Metering, mixing and dispensing equipment for epoxies, polyesters, and urethanes includes static mixers of stainless steel and/or disposable construction.


Motionless mixing elements include Thermogenizer for extrusion. It delivers homogenized melt streams to the die and has mixing capacity independent of extruder output. Heat exchangers (multitube and jacketed pipe) use Kenics elements to enhance heat transfer to polymer melt and foam. All units are compact, heavy-duty, have no moving parts, and provide economical and efficient continuous heating and cooling.


Static mixers reportedly achieve uniform, controlled degree of shear and flow. Unique element shape provides lower cost mixing than competitive shapes, according to company.


See Louis P. Batson Inc.


Auto Weigh gravimetric blenders blend two to eight materials in batch sizes of 4.4, 8.8 or 19.8 lb. Precise control of colorant and/or additive metering provides repeatable accuracy of one part of color to 1000 parts of natural virgin (0.1%). Eighteen models with capacities from 10 lb/hr through 2400 lb/hr.

Gravicon loss-in-weight blenders provide continuous blending of up to four free-flowing materials at rates to 4000 lb/hr.

Volumetric metering blenders include 3000 and 5000 series, which use direct-drive metering-auger motors and solid-state, variable-speed controls to meter up to six different materials continuously to a mixing chamber, then auger discharge the blend.

Autocolor Plus on-machine volumetric metering blenders are self-loading. Fixed quantities of virgin materials and regrinds are mixed with controlled amounts of colorants or additives (up to two). Microprocessor-controlled models for 600 lb/hr or 1200 lb/hr.

For high-throughput, direct-to-process or central volumetric blending, Conemix Plus series has blending rates from 600 lb/hr to 2700 lb/hr per auger. Accuracy of [+ or -]1% or better achieved in blending two to four ingredients.


Distributes Plas Mec (Italian) line of Turbomixers and auxiliary components for temperature regulation and vacuum mixing, in capacity from 176 to 1760 lb per loading. Volumetric displacement capacities run from 200 to 2000 liters.

Also available: horizontal ribbon blenders for cold mixing of temperature-sensitive materials, and special systems for combination heating/cooling with mixing. Automatic systems for charging mixers and for "containerizing" finished blends, as well as laboratory-sized systems available.


Versator solid/liquid blender can mix, blend and defoam two or more components. Recommended for coatings and pastes, it disperses one or more finely divided solids into liquids and will simultaneously deaerate. Disc in vacuum chamber revolves from 900 to 6000 rpm. Handles broad viscosity range.


Laboratory and pilot-plant mixing extruders. Screwless extruder uses elastic-energy storage characteristics of polymer melts for mixing and extrusion. Residence time is said to be short (typically 20-31 sec), and amount of shear applied to the melt and degree of mixing can be varied.

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


D-tex twin-screw corotating and counterrotating intermeshing extruders come in 30 to 128 mm with output rates from 50 to 8000 lb/hr and lengths to 56:1 L/D. Three rotation modes: both counter and corotating without gearbox modifications, standard corotating, or counterrotating. Series offers maximum barrel ports for downstream solids additions or devolatilization.

Sterling single-screw compounding extruders handle cold- or hot-feed additive blending. Hard-to-feed material can be introduced either by ram stuffer or screw auger to force-feed materials at the extruder throat, or through a side-arm addition where the material is metered into the molten polymer stream beyond the extruder's melting section. Applications include color concentrate, filled systems, alloying, scrap reclamation and compounding.

Also manufactures Cavity Transfer Mixer for continuous blending in sizes 25 to 450 mm under license from Rapra of the U.K. Mixer's rotor with spherical cavities is attached to the end of the extruder screw, and the stationary housing is mounted between the barrel and die. Resulting circulating and cutting motion provides distributive mixing. Less restricted flow of material is achieved because unit has no pins, dams, or other obstructions. Reduction of material distortion through the die and residual stress is achieved because the unit establishes even heat distribution. Mixer has no "dead spaces," resulting in quick changeover of polymer.


Drais Perl ball mills finely disperse and homogenize high-, medium-, and low-viscosity materials and stiff pastes. Units include perforated or pinned-disc agitator and chamber 80-90% filled with small grinding beads from 0.25- to 2-mm diam. Large number of beads results in very fine grinding and dispersing and is said to increase output by 30-50%. Chamber capacities range from 1 to 1500 liters.

Drais turbulent mixer/reactors are for high-speed mixing, kneading, and reaction processes. They have interchangeable mixing elements for powders, pastes, and reaction processes. Knife mills, pinned discs, and main-shaft-mounted serrated discs can be built into the reactor chamber. Batch and continuous process designs with capacities from 2.5 to 40,000 liters.

Drais Getimat high-intensity mixer from 1 to 250 liters uses friction energy to heat the product for mixing and fluxing, and reportedly completes a cycle in 15-25 sec. Mixer can process PVC, PP, PE, UHMWPE, ABS and PVDC. Material can be directly discharged into an extruder, mold, or roller mill and pelletized. Batch and continuous models.


Six types of Kelly Duplex mixers:

* Vertical spiral mixers in 10- to 1500-cu-ft sizes blend free-flowing granular or fine materials.

* Horizontal paddle mixers in 2- to 360-cu-ft batch sizes for fast blending of regrinds, slurries and powders are said to be particularly effective for batch mixing of PE and color pigments for rotomolding. Units provide positive discharge, are said to be easy to clean, and feature air-purged shaft seals that help prevent contamination.

* Fluid-bed mixers for unusually heavy or pasty materials in 2- to 200-cu-ft batch sizes.

* Horizontal ribbon mixers for mixing flow-resistant materials up to 580 cu ft per batch.

* Continuous twin-ribbon mixing conveyor with capacities from 50 to 12,000 cu ft/hr combines mixing and conveying of bulk materials.

* Continuous twin-rotor paddle mixers blend solids with solids or liquids at rates from 100 to 3000 cu ft/hr.

Kelly Duplex batching and mixing package allows material to be automatically batched, mixed, and stored, then fed directly to extrusion machinery. Line of complementary equipment also available.


Air-motor and electric-powered agitators/mixers from 1/6 to 5 hp in direct drive or with gear-reduction units to accommodate all mixing viscosities. Models for use in 1-gal to 5000-gal open, closed, pressure or vacuum vessels. Stainless-steel couplings, shafts and propellers standard. ANSI and Tri-clover flange mixers configured for top, side or bottom entry. Air models are explosion and shock proof, and free from burn-out. Electric models available with explosion-proof motors and inverter units for speed control. Mixers can be customized.


Single- and twin-screw compounding extruders offered with microprocessor controls, strand, underwater and water-ring pelletizing systems. Complete test and demonstration capabilities at technical center in Somerville, NJ. Twin-screw corotating, intermeshing compounders have capacities of 100 to 2500 lb/hr and segmented barrel and screw elements. Special adaptations of Egan's CMR computer system control product consistency, create reports, and offer management information. Controller can interface with feeders and extruder, as well as downstream operations.


Laboratory and production two-roll mixing, warm-up, and blending mills have working faces from 6 x 13 in. to 26 x 84 in. and up to 120 in. long. Can be furnished with standard sleeve bearings or roller bearings, as well as chrome-plated and drilled rolls, motorized adjusting screws, air-operated scraper knives, and tilting stock guides. Drives are constant-speed a-c or variable-speed d-c. Rolls available with standard cores or drilled for cooling and heating.


Continuous Mixer is a starve-fed, twin-rotor, intensive-fluxing mixer used primarily for polyolefin color master-batching and homogenization and compounding engineering resins, reinforced or rubber-modified polymers, and rigid and flexible PVC. Units range from 25 to 85,000 lb/hr and feature variable work-input levels to permit adjustment of discharge temperature. Non-intermeshing short-rotor design provides fast product changeover and easy cleaning. Farrel CP (Compact Processor) combines the Continuous Mixer with a hot-fed extruder to provide a versatile, space-saving stem.

Also manufactures Banbury twin-rotor intensive-fluxing batch mixer and Diskpack processor, a screwless continuous compounder.


In-line mixing system for polyester SMC.


Volumetric and gravimetric blenders are either machine-mounted or free, standing.

Volumetric blenders: Upright duplex series blends up to 6000 lb/hr of virgin resin, granulate, colorants, and additives in pellet, powder, or film flake form. Includes holding bins, metering augers or vibrators, and cascading chute or mixer.

Mini- and machine-mounted blenders for the same range of materials as the Duplex series are designed for direct mounting on process-machine throat. Continuous mixers are optional.

Gravimetric (weight-based) blenders: LWB Series and BWB Series for either loss-in-weight or batch-weight continuous blending available for floor or machine mounting. Microprocessor controls provide accuracy to [+ or -]0.05% by weight. Standard on all units is continuous inventory monitoring of all ingredient throughputs. Feed and control options include plant-wide data acquisition and material-usage control with central microcomputer. Custom and proprietary systems include options such as liquid feed by weight.

Also pellet and powder feeders, both volumetric and gravimetric, for mixing and feeding additives on-stream.


Hurricane propeller mixer from 25 to 10,000 gal or more will mix any viscosity in a short time. Larger units with 2-ft shaft lengths and longer. Propellers available in either turbine, flat, curved, paddle, ribbon or anchor types. Units available in carbon steel, Iconel, Monel, or other materials.

Direct gear-drive or belt-reduction drive. Propellers are top-entering with 1/2- to 25-hp gear motors and prop sizes 6 in. to 10 ft in diam. Special units have variable-pitch props and variable speeds, variable shaft lengths and submersible, electric, air or hydraulic motors.


Tumble blenders, dryers, and formulators for powders. Semi-continuous Porta-Hopper combines speed of continuous blending with versatility of batch operations. Formulator combines multiple steps in materials handling and blending to reduce time, labor, and worker exposure. Full laboratory for process development and product testing.


Rheomix 600 standard, internal and intensive mixers for a wide range of applications generate data for shear and temperature stability, absorption and curing tests for thermoplastics, elastomers and thermosets. Volume of mixer is 70 to 100 cc.

Rheomix 3000 closed, high-intensity mixer provides up to 300-cc mixing capacity for viscosity and stability tests.

Rheomix 610 liquid-heated mixer has equivalent applications to the Rheomix 600.


Modular blending system automatically weighs as it loads itself with one or more pellets or powders and weighs minor ingredients (pellets, powders, or liquids) as they are metered into a scale hopper. Blending is done in either a supplied dynamic mixer or a separate ribbon or high-intensity mixer. These larger systems deliver from 4000 to 8000 lb/hr of blended materials.

Model 1200 D weigh blender is used as an individual machine blender or small central blender for up to 1200 lb/ hr. Up to six different materials can be blended. Programmed weights of each material are metered in sequence to a weighing chamber. A complete batch is then discharged into a mixing chamber.

All weigh blenders have [+ or -]0.5% accuracy. Larger models come standard with DX electronic controls, including CRT screen and custom keyboard for recipe entry and storage. Displays include totalization, setpoint recipe, stored recipe and alarm signals. Optional printers may be supplied, and controls can be interfaced with factory computers.


Distributes meter-mix blenders built by Har/Noy Metal Fabricators of Olathe, Kans. These blend virgin, regrind, color concentrate and other granular materials at 3000 lb/hr and more. Hampel also distributes machine-mounted proportioning equipment from Plastore and Labotek for mixing colorants, regrind, and other additives.


Complete compounding systems include scales, feeders and controls. Designs powder scales, liquid scales, conveyors, and minor-ingredient systems. Custom systems use industry-standard components.


High-intensity PVC powder mixers and coolers from Thyssen Henschel in Germany. Mixers come in bowl capacities from 9 to 2000 liters. Coolers come in sizes of 23 to 3600 liters and are of vertical bowl-type construction. Cooling cones in center of bowl supplement the usual cooling jacket and offer increased surface area. Horizontal cooler has clam-shell lid for easy access for cleaning. Sizes from 20 to 8000 liters.

Henschel Universal mixer is a bowl-type mixer with high-speed choppers in the wall and bottom mixing tool. It produces a vortex flow pattern to ensure short cycle time and homogeneous blend. For easy cleaning, the mixing tool is keyed on the shaft but not bolted down. Mixer blends dry ingredients and makes color masterbatches using less energy than a high-intensity mixer. Capacities vary from 25 to 2800 liters.


Concentric shaft mixer with a high-intensity and slow-speed mixing blade blends dry materials into viscous liquids.

High-speed mixers with high-shear mixing blades handle low-to-medium viscosity range.

Horizontal mixer has mixing blade designed for low-intensity mixing of highly viscous products. This design, according to the company, lends itself to efficient batch unloading. Positive, displacement pump can be supplied already mounted on the machine.


See Micron Powder Systems.


Horizontal ribbon mixers in 5 to 220 cu ft capacities with a variety of ribbon configurations, and vertical mixers from 12 to 1500 cu ft in mild and stainless steel.

Horizontal ribbon mixer has relatively gentle mixing action, utilizes outer and inner ribbon folding-action arrangement on a common shaft. Outer ribbon transports product one way, while inner ribbon reverses flow pattern. Mixers are used to blend pellets, powdered resins, pigments, and reclaim. Liquid-spray nozzles and heating/cooling jackets can be used when plasticizers are added to a dry mix.

Vertical mixers for compounding and pellet mixing utilize low-intensity mixing action and have a central vertical screw that transports product from the lower portion of the mixer cone up through the product mass and discharges at the top. Mixer uses centrifugal force, flingers on the screw-conveyor outlet, and internal baffles for mixing.


Supplies static-mixer components that are inserted in injection nozzles.


Used and rebuilt compounding extrusion systems and all accessories such as high-, medium- and low-intensity mixers; ribbon blenders; drum tumblers; and twin-shell and continuous mixers.


Hydracolor color-concentrate and dry-colorant metering units and blenders are solid-state controlled by digital counters to maintain ratio between virgin and color. Large central blenders to 15,000 lb/hr.

RWIMB series ratio-weigh blenders feature weighed virgin and regrind metering/conveying. When a preset weighed batch is dumped into the mixer, correct amount of additives is precisely metered at the same time. The 400RWIMB, used with 6150RW microprocessor control and RS485 serial port for communications, provides a menu-driven format.

Company's 400 series accumulative weigh blenders have menu-driven computer controls. Several of these units can interface with each other for total plant inventory control. The 402B hatching loss-in-weight blender is available with powder feeders.

Patent-pending 470 Ulti-Meter eliminates any need for mixers--materials are weight-loss metered continuously at the same rate as the extruder consumes them. Design provides "first-in/first-out" (FIFO) feeding to the extruder and eliminates segregation of virgin pellets and additives. Controls are designed to allow color changes on-the-fly by initiating 100% virgin feed while hoppers and auger assemblies are changed over to another material. Unit can then switch over to the new recipe without halting production. Because material in residence is very small, color change is effected within minutes. Microprocessor controls auger speeds to within 1 rpm of setpoint. Hand-held remote-control key-pad can be located conveniently by the operator station.


PCM series of intermeshing and self-cleaning, high-speed twin-screw extruders utilize segmented screws to regulate kneading effects on materials. Barrel uses a building-block system so that L/D ratio is easily adjustable. Screws are driven in either corotating or counter-rotating direction. Screw diam. from 29 to 125 mm.


Heavy-duty drum tumblers feature 20[degrees] tilt and crisscross action. A 1/3-hp mini-tumbler accepts 5-gal pails and up to 36 lb per holder. Larger twin-drum tumblers with 1 1/2-hp motors handle 30- or 55-gal drums and up to 280 lb per holder. Also a space-saving, single-drum corner unit. Most units available with lower-cost chain drive or longer-lasting, maintenance-free belt drive.

For high-volume, high-speed blending, two Hurricane large-capacity mixers mix 350 or 850 lb in 15 minutes. Platforms, bag breakers and air takeoff available.


Two models of motionless mixing nozzles for injection machines: one is solely a motionless mixer, and the second is a combination mixer/melt filter to remove contaminating particles from resin. Basic mixing element is a tubular chamber filled with loosely packed, grooved balls; melt flows through the grooves and around the balls. These intersections force melt in a gentle action to promote thermal homogenization and mixing.

Mix Pac filter is similar in construction, except melt must first pass a through tubular filter before passing through the mixing balls to the mold.


Portable liquid mixing equipment includes laboratory stirrers, high-speed laboratory dispersers, 5-gal mixers, and drum mixers (direct- and gear-drive) to handle materials from 55 to 5000 gal. Also mixing propellers, paddles, blades, and pail openers.

HD series of heavy-duty bung mixers handles 55-gal batches of heavy materials that are beyond the range of direct-drive mixers. Electrically open, totally enclosed, and explosion-proof motors, as well as air-powered versions. Standard electric motors are 420 rpm; standard air units range 70 to 700 rpm. Folding propellers collapse for entry through 2-in. bung and open to 8-in. diam. for mixing. Propellers are adjustable on the mixing shaft.


Vertical blender for batch mixing pellets, flakes, and regrind with dry colo-rants and additives can be loaded with an auger, flow-through bin, or vacuum loader. Up to 30 cu ft can be mixed in about 15 rain.


Information is supplied on complete systems from 40 Italian manufacturers that supply blenders, turbomixers, roll mixers, and internal mixers.


Biox proportional fluid blending system provides two-component flow and mixing control accurate to 0.1% at all flow rates. Rates are digitally selected from 0.001 to 999 ml/min. Mix proportion of A to B is selectable in 0.1% increments. Parameter changes are accomplished without stopping the unit via digital thumbwheel switches. Constant volumetric flow rates are maintained even when the liquid proportions are changed. Solid-state electronics, stepping-motor drives, and valveless ceramic pumps provide accuracy with reliability and long life.


Propeller-type liquid mixers in side-entering and top-entering models with single or dual propellers. Portable Jaecomix units have up to 3-hp motors. Square, three-bladed, and steep-pitch propellers in steel, stainless-steel, and plastic construction. Shafts and propellers can have rubber or plastic coatings.


Two types of twin-screw mixers:

CMP-X series of corotating twin-rotor mixers with gear pump is based on the company's CIM continuous intensive mixer technology. Standard models range from 65- to 340-mm rotor diam. Largest model has max. rotor speed of 206 rpm, 8000-hp drive, and throughput to about 70,000 lb/hr. Clearance between the screws and barrel wall can be adjusted by a slot-control mechanism.

Tex twin-screw counter- or corotating extruder has change lever at the side of the gear box, segmented screw, and block cylinder. Sizes to 305-mm diam. Largest unit, Tex 305, has 8000-hp gear box and output of 44,000 lb/hr.


Conical-screw blenders for pellets, powders, pastes, etc. in mild or stainless steel consist of conical hopper chamber with internal screw mixer that helps discharge product through bottom of the cone. Jacketed units for heating, cooling, and vacuum operations available.

Coaxial twin-rotor mixers for PVC plastisols have capacities from 200 to 2500 gal with drives from 15 to 250 hp. Mixing bowl contains low-speed outer wiper blade and coaxial but independently driven high-speed dispersion blade.

Planetary mixers have 1- to 500-gal capacity, side scraper arms and central high-speed disperser.

Extrumix sigma-blade, double-arm batch mixers discharge product horizontally with an extruder screw. Size range is 1 to 1000 gal. Several models handle highly viscous materials up to 10 million cp.

Also supplies ribbon blenders.


Propeller mixer for heavy or viscous liquids available in sizes that fit over containers from 1 pt to 100 gal. Heavy-gauge metal unit eliminates sucking in of air and splashing. Different sizes of mixing attachments fit standard 1/4- to 3/4-in. power tools.


K-Tron Colortronic gravimetric and volumetric blenders for injection molding, blow molding and extrusion feature synchronous feeding for continuous blending, which does away with mechanical mixing and potential for material segregation. Gravimetric units provide continuous, high-accuracy, in-line weigh blending of up to eight ingredients. Resins and additives, either pellets or powders, may be fed at a total throughput of over 5000 lb/hr. Features include stable, high-resolution digital weighing of each ingredient; and stainless-steel ingredient modules with easy sampling and fast cleanout for material changeovers. Special feeder modules for regrind and fluff. Full-featured, microprocessor-based controls provide RS485 serial communications link to host computer or to record performance documentation for ISO-9000. Extrusion control packages also available: weight/length control for profile and wire/cable coating extrusion, or weight/area control for blown film, cast film and sheet.

Volumetric continuous blenders automatically meter and mix pellets, granules, powders, and liquids directly on injection and blow molding equipment. Units incorporate discs instead of augers and disassemble for quick cleanout. Synchronous feeder design permits continuous blending without use of mechanical mixers. Models available for 250 to 2000+ lb/hr throughput. Optional microprocessor-based blender control provides recipe storage, "auto calibrate" mode, totalizer functions, and interface capability.

K-Tron Soder line of volumetric and gravimetric feeders and controls for compounding. Patented Smart Force Transducer weigh modules provide weigh-feeder resolution of 1:1 million. Feeder controls easily interfaced with user's PLC/DCS and may be configured for continuous or batch processes.

Also a line of weigh belt and loss-in-weight feeders. K2-Modular feeders feature Powersphere feeder module for fast cleanout, good mass flow, and consistent screw fill. Powershift feeder drive system permits widest range of feed rates--to 500:1 turndown. K2-Volumetric feeders offer same Powersphere and Powershift features as K2-Modular loss-in-weight feeders and may be upgraded to loss-in-weight units. All volumetric feeders come with DigiDrive all-digital control, an easy-to-use microprocessor-based control that includes "no-flow" alarms.


Single-screw extruders designed specifically for compounding available in screw diam. from 0.75 to 2.5 in. with 36:1 L/D and vent for devolatilization. Second stage of two-stage screw has mixing elements for laminar, dispersive, and distributive mixing. These include multi-flighted sections, mixing pins, gear-type mixers, and fluted mixing sections.

Additional features include injection ports along the barrel for downstream feeding of additives, and separate control panel for easy access to machine during maintenance and clean-up. Strand and die-face pelletizing systems available. Machines also may be interfaced with downstream equipment to compound in-line with extrusion.


Represents Kobe Steel and offers continuous and batch compounding and mixing equipment:

* NEX-T and Mixtrumat continuous two-stage, twin-rotor, high-intensity fluxing mixers with transverse-discharge extruder screw are used primarily for polyolefin masterbatching, homogenization, compounding rigid and flexible PVC, and compounding engineered resins and reinforced or rubber-modified polymers.

* NCM continuous mixer has three-bladed segmented rotors for quick reconfiguration. Long L/D rotors provide intense mixing for difficult compounds.

* LCM continuous mixer with 10:1 L/D rotors and two-stage mixing, vent and gate control. LCM-G system with gear pump and pelletizer for high-capacity, post-reactor mixing, homogenizing and pelletizing.

* Hyper KTX deeply intermeshing, corotating twin-screw extruder for high-torque, high-performance compounding.

* BB Mixtron twin-rotor, internal, batch-type intensive mixer with patented rotor design and high-performance, low-lubrication dust stops.

* Economix internal batch dispersion mixer/kneader with twin-mixing rotors. Low-profile unit is self-contained and floor mounted, eliminating need for platforms or mezzanines. Mixing chamber tilts 140[degrees] for fast, easy discharge and cleanout.

* Custom-designed two-roll mixing mills.

Also MP-100 batch-mixer computer control system for precise automatic mixing control; complete turnkey compounding lines; pilot plant/lab for evaluation and testing; remanufacturing and rebuilding.


Motionless mixing equipment improves mixing in injection molders and extruders. Combination static mixer/heat exchangers are designed for cooling of high-viscosity materials, isothermal control of exothermic/endothermic reactions in plug flow, rapid preheating for flash devolatilization, and heating of thermally sensitive materials. Various configurations: SMX jacketed monotube design for heating and cooling; SMXL multichannel shell-and-tube design, primarily for rapid heating; SMR tubular design with large heat-transfer surface in a single flow channel.


Complete mixing systems control addition of colors, lubricants, uv stabilizers and other liquid additives after the extruder. AddMaster 1200 provides the reservoir, pump and special heaters to supply additive to the injection point while profiling the additive temperature to end up close to that of the polymer melt stream.

Equalizer modular motionless mixer ensures complete mixing of additives and melt stream. It consists of stackable tagential-type modules, which upon assembly become their own barrel. Together with an Equalizer, the SIDD (Special Injection and Distribution Device) allows additives, usually of much lower viscosity and flow rate than the main flow, to be introduced into the melt stream.

TEDD (Temperature Equalization and Distribution Device) is used in blown film dies to enhance gauge control. Two- or four-module assemblies are installed in the throat of the blown film die or die adaptor.


Drum tumbler for dry-color blending uses end-over-end tumbling motion for mixing. Material is held in removable bins.


Resin/additive blenders provide metering accuracy of color concentrate and additives in the range of 0.1% to 1.0%. Mini-Masterbatcher (MMB) and MMB Mixer with Con-Evator vacuum hopper loader and Ratio-Selector provide automatic loading, metering and mixing of resin, regfind, color concentrate, and a second additive if required.

Conti-Master compact machine with two to five metering stations feeding into an inclined screw mixer offers same accuracy as the MMB with capacities up to 500-6000 lb/hr, depending on number of stations and materials being metered. Automatic loading of stations is provided by three-phase vacuum motor/blower units mounted in the remote-control unit.

Mini-Contimaster microprocessor-controlled metering/mixing unit for virgin plastics, regrind and additives in granular form has up to five dosing stations, with high dosing accuracy using step motors, and max. capacity of 180 liters/hr (approx. 240 lb/hr). It has a built-in microprocessor; after the operator enters data on material bulk densities and mixing percentages required, proportions are calculated automatically, and the machine adjusted accordingly. Detachable keyboard can be removed and the Mini-Contimaster will remember programmed data so the same keyboard can be used to program other units. Automatic conveying by means of a single vacuum blower.


Blenders for two to eight materials have capacities to 20,000 lb/hr. Also line of auger, vibratory-feed, weigh-scale and loss-in-weight blenders, additive feeders, and proportioning loaders.


Thermoprofiler motionless mixer for extrusion and compounding blends low-to high-viscosity materials and color additives without streaking and reduces temperature differentials downstream to less than 3.5[degrees] F.

Smartblend gravimetric, cumulative weigh blender for multiple ingredient blending provides blend ratios with accuracies by weight of 0.25% or better.


See American Leistritz Extruder.


Series 50 in-line motionless blender in standard 2- to 6-in. pipe sizes blends liquid additives into high-viscosity materials. It also does liquid/liquid solvent blending. Blender elements can be indexed in 12 1/2[degrees] increments for optimum results.


Air-operated proportioning pump (1:1) mixes fluid compounds of plastic materials and discharges them into molds or containers.


RRIM filer blending systems blend "B" component (polyol) of urethane, polyurea or polyester RRIM systems with fillers, IMR and carbon black. Applications include fascias, doors, fenders and side moldings for the automotive industry, as well as bathtubs, sinks, and other molded parts. Mixer sizes from 25-gal lab unit to 980-gal production system.

Capacities for blending slurries up to 4500 lb/hr. Automatic filler unloading from gaylords prevents material loss and assures a clean, dust-free environment. Liquid components received from bulk-storage tanks or drums. Weight-metered components ensure accurate and consistent ratios. Orbital-arm, conical-screw mixer provides efficient mixing. Slurry is automatically transferred to temperature-controlled holding tank. Recirculation/transfer pump and pipe loop conveys slurry to RRIM stations. Load cells interfaced with a programmable controller ensure accurate control. Process is displayed graphically on a CRT with SPC capability.

Custom-designed, modular polyol in-line blending system can blend three to six components. Utilizing a 486 PC and Allen-Bradley PLC, system controls are menu-driven, and sensors continually monitor ratio precision.


In-line motionless mixers blend multi-component liquid streams in sizes from 3/16 in. to 2 in. Posimixers are available in 3/16-in., 1/4-in., 3/8-in. and 13mm I.D. with various numbers of elements in disposable assemblies; in 5/8-in. O.D. stainless-steel tube mixers with plastic elements; or in 1-in. pipe mixers with plastic elements. Other motionless mixers with removable or welded elements and stainless-steel tube or pipe construction.


Day Mark II Nauta vertical conical mixer/processor performs low-shear blending/dispersion and batch standardization for pigments, colorants, plastic pellets, etc. Widely used for plastisol and organosol production, solids and paste mixing. Capacities to 1400 cu ft.

Double-arm high-shear mixers compound, knead and mix heavy viscous masses that are hard to blend, such as BMC. Capacities from 5 to 1000 gal. Mixtruder double-arm mixer has discharge screw to facilitate unloading. Capacities from 1 to 500 gal.

Daymax high-speed disperser for dispersion, dissolving, emulsification and other liquid-solid applications. Used for medium-viscosity plastisols, color concentrates, pigment dispersions, and premixes. Capacities from 10 to 1000 gal.


Color and additive metering equipment includes auger feeders for pelletized color and regrind, pumps for liquid color, weigh-scale blenders, color loaders, material loaders, mixers for premixing color and natural material, magnet drawers, and other related accessory equipment.


Nonintensive mixers, either paddle or ribbon design, provide batch or continuous mixing of dry materials such as powder or fiberglass with pellets, or liquids with solids, slurries or pastes. Units mix dissimilar particle sizes and densities. Close clearances between agitator and tanks ensure complete discharge. Drop-bottom mixers also available.

Optional fillet-weld sanitary construction for color cleanout. Mixers made from carbon steel or stainless steel with optional heating or cooling jackets in lab sizes and large production units.

High-speed Marion mixer with choppers is an intensive, nonfluxing mixer that fluffs compacted synthetic fibers used in molding compounds, disperses pigments into plastic powder, and heats and disperses plasticizers into PVC. Available in U-shaped or semi-cylindrical designs.


Matcon-Buls tumble blender gives homogeneous blend of materials with no degradation of product and provides a degree of dispersion acceptable even by pharmaceutical standards. Blender accommodates Matcon-Buls Intermediate Bulk Containers (IBCs), in which product can be transported, blended and subsequently stored. It consists of an electrically powered cage into which the filled container is loaded. It then revolves on an eccentric axis between two supporting pedestals at a predetermined speed for the required blend time. Offset axis of rotation causes a complex pattern of particle movement within the container. Because resulting action is a gentle, tumbling one, degradation of product is avoided.

Batches can be blended in 2 to 20 min, depending on nature of the material and degree of dispersion required. Because Matcon container system discharges material on a "mass flow" (first-in-first out) basis, there is no separation of product after mixing or during the discharge operation. This guarantees that homogeneous blend of product is retained during storage and throughout the discharge process until the container is empty. Blenders are ruggedly built to ensure safety and can be made fully automatic under the control of a PLC. Available in a range of sizes and can be supplied in mild-steel or stainless construction.


Liquid blending systems for two or more components heat materials up to desired process temperature, de-gas, meter with accuracy of [+ or -]0.5% of desired flow rate, mix and dispense. Suited for blending of urethanes, silicones, epoxies, and other liquids. Systems are designed around user requirements, using standard sub-assemblies to construct "roll-in-place" turnkey units.


Papenmeier high-intensity mixers for PVC and ABS are manufactured in the U.S. utilizing proven European designs. Mixers are available in sizes from laboratory models to full production machines for over 8000 lb/hr. Mixer/cooler combinations have increased cooling area for reduced cycle times.


Conical mixing vessels have an orbiting arm and a rotating screw element that follows the cone wall. Reported advantages include reduced mixing times, high mixing accuracy, and reduced power consumption. Nauta mixers for dry solids, pastes, and viscous liquids are constructed in a variety of materials and finishes.


Single-screw mixing extruders have hexagonal-barrel mixing section of 50 to 135 mm. Corotating twin-screw compounders range from 45 to 125 mm.

MIXING TECHNOLOGY, INC. Distributes vertical high-intensity mixers from MTI Mischtechnik of Germany. Lab mixers range from 1.5 to 35 liters, and production-size models from 75 to 2080 liters. Uses include PVC preparation; densification and sintering of ABS, PE and PP; and color masterbatching. Also offers MTI's line of horizontal mixers from 100 to 8000 liters.


Liquid mixing equipment from single-shaft units for lower viscosity products to multishaft units for high viscosities exceeding 1 million cp. Lab-size rental units available.


Double-bladed batch dispersion mixers with floating pressure lids mix all types of materials from silicone rubber to fluoroelastomers. Mixers feature tilting mixing chamber for easy cleaning and color change. Common bed plate allows simple, space-saving, low-cost installation. Units range from 0.5-liter lab size to 300 liters and include motor, operator panel, and recorder for mixing temperature and amps.

Laboratory-model, twin-rotor batch mixer has variable-speed drive and heating capacity to about 450 F.


Drum rotators and tumblers agitate up to 1000 lb of material in ordinary closed drums or other cylindrical containers. Applications include remixing settled material and blending liquids, solids, or solid-liquid mixtures. Some models use rolling action and others end-over-end tumbling. Portable and stationary models. Some have built-in, self-loading capability. Fixed- or variable-speed drives and choice of electric motor voltages and types of air motors.


VBL-300 pellet blender blends up to four pelletized ingredients or free-flowing regrind, comes with low-level alarms in each compartment, and has throughput of up to 1500 lb/hr. Normally manufactured with a vacuum take-off box, units also available with gaylord clearance and machine-mount bases.

Xactablend continuous-processing blender has computer control for metering by weight loss. System is menu-driven with all variables such as process rate and individual ingredient volume entered through a simple function-key terminal. Memory for 25 different recipes makes repeat setups simple. Messages and instructions displayed on easy-to-read backlit LCD. Continuous analog weight-loss signals from each material hopper mounted on an individual load cell are received by a computer, allowing precise blends by weight regardless of bulk-density variations. Process rate is accurately matched by constant monitoring of the mixing chamber's high-level proximity sensor. When mixing chamber initiates a demand signal, the computer runs all ingredient feeders at required rates until satisfied.

Xactabatch weigh-scale batch blender is for two to six ingredients. Micro-processor control, utilizing two load cells mounted on a single weigh-scale hopper, weighs each ingredient dispensed and deposits the total batch into a mixing chamber. Programmable logic controls standard.


See Mixing Technology, Inc.


Rotary mixers and ribbon blenders with volumes from 1 to 500 cu ft in carbon or stainless steel. Mixers feature low energy consumption plus low-intensity mix action to help maintain batch uniformity. Special intensifying attachments reduce mixing time.

New Hi Intensity continuous mixers continuously blend, coat, agglomerate and homogenize powders, solid/liquid mixes, slurries and sticky materials. Three basic sizes include Model 83 (8-in. diam., 36-in. long), Model 124 (12-in. diam., 48-in. long), and Model 165 (16-in. diam. 60-in. long). Internal agitator arrangement can use paddles for mixing, adjustable throughput, and better cleanout; pins for increased residence, agglomeration, and intensity; or combinations of both. Drives have multiple v-belt for high-speed applications, and gear reducer for low-speed applications. Variable-frequency controllers available. Options include internal liquid addition port or spray line, special sizes or configurations, and replaceable wear liners or modifications for abrasive materials.


Portable solids mixer with 8-in.-diam. vertical auger mixes a batch in as little as 10 min. Seven models have 14-gauge steel construction, two-way entry, hinged covers, 8-in.-diam. slide-gate discharge, safety lock, and 60-min timer.

Horizontal screw blender with output capacity from 4000 to 12,000 lb/hr is for precision metering and blending of virgin materials and regrinds. Features include positive a-c drives, automatic shut-off, adjustable regrind ratio, and blower, vacuum, or gravity loading. Optional color-concentrate bin. Company will also modify or build a materials-handling system to fit specific applications.


Custom designs complete bulk-storage and materials-handling systems for compounding. Lines can include conveying equipment, roll mills, tumblers, blenders, dicers, granulators, and pelletizers.


Three types of gravimetric blending systems include an inexpensive gain-in-weight batch blender, a loss-weight batching blender, and a continuous loss-in-weight blending system. All three incorporate a maintenance-free suspension that eliminates need for error-inducing mechanical devices such as flexes, tie rods and check links. Repeatable weighing accuracies from [+ or -]0.1% for batching blenders to [+ or -]0.5% of full-scale capacity for continuous loss-in-weight system. Each system can blend two to eight or more materials without degradation or secondary stratification. Modular construction provides easy access to all blender parts and speeds clean-out and changeover. Microprocessor-based controls standard. Continuous loss-in-weight system available with 12-color CRT display.

AFCB (auger feeder cascading blender) reportedly can satisfy 99% of pellet blending requirements without an expensive weigh feeder. Up to four materials are proportionally fed ([+ or -]1%) into cascading section of the blender. After falling through a series of pyramids, resultant blend is completely homogeneous. No further blending is required in the catch hopper. Energy costs are lower because there are no moving agitator parts. Because the static cascading section is removable, cleanout is simple. Throughput capacities up to 3960 lb/hr of material having a bulk density of 45 lb/cu ft. Standard features include surge bin with a 100-lb capacity, floor stand, level controls, two-position take-off box, control panel, and single bottom slide gate on the feeder for easy calibration. Warning lights, extra-large surge bins, vacuum loaders, regenerative blowers and probe box optional.


Custom-built continuous and batch mixiers reportedly offer increased production, greater yield and uniform quality for applications including emulsification, aeration, dispersion, dissolution, and reactions. Have flow rates from 0.1 gpm to 100 gpm, and pressures up to 1000 psi. Materials of construction include 303 SST, 316 SST, Hastelloy and Carpenter 20.
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Title Annotation:Manufacturing Handbook & Buyers' Guide 1994/95
Publication:Plastics Technology
Article Type:Directory
Date:Jul 15, 1994
Previous Article:Extrusion systems suppliers' data sheets.
Next Article:Injection molds.

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