Quick changes and hybrids add versatility.TOP OF THE NEWS * Twin-screw changes barrels automatically. * Extruder starts as a twin, ends as a single-screw. * Pelletizer has quick-change die plates. New compounding technologies displayed at K 2004 included some unusual ways to broaden the range of products a twin-screw compounder can make. One such machine had a choice of interchangeable L/Ds and another was a hybrid of a twin- and single-screw extruder in one barrel. New pelletizers and dies also emphasized versatility with quicker changes and more wear-resistant surfaces. (Not covered not covered Health care adjective Referring to a procedure, test or other health service to which a policy holder or insurance beneficiary is not entitled under the terms of the policy or payment system–eg, Medicare. Cf Covered. here are new equipment from Berstorff, Farrel, and Henschel that were reported in our show preview in September.) Quick barrel changing Leistritz in Germany showed the first production-size compounder of any kind capable of automatically exchanging one barrel for another. The idea is that it allows one machine base and drive motor to run a choice of two different L/Ds--e.g., a short barrel for masterbatches and a longer barrel for filled compounds. A 50-mm prototype of the new ZSE-Flex demonstrated the barrel change automatically in 15 min. The machine could handle L/Ds from 32:1 to 52:1 powered with the same drive motor, Leistritz says. Mechanical arms roll one twin-screw barrel section out on one side of the extruder, while other arms insert the new prewarmed barrel and screws on the other side. Fast hook-up to dies and water lines is accomplished by mounting all water connectors on a single panel. A new water-cooled shroud keeps the barrel surface cool for operator safety as barrels are moved around. Under the shroud, a new barrel-cooling loop has 30% greater cooling capacity. Leistritz plans a full demonstration at an open house March 8-9 in Nurnberg, Germany. Leistritz also has a new shaftelement joint technology called ZSE ZSE Zimbabwe Stock Exchange ZSE Zagreb Stock Exchange (Croatia) Maxx. It uses splines that have a higher OD/ID ratio of 1.66:1 vs. 1.53:1 previously. The deeper splines are also trapezoidal, not triangular, so they conserve more torque and allow more free volume for 25% to 35% higher output, Leistritz says. CTE (Coefficient of Thermal Expansion) The difference between the way two materials expand when heat is applied. This is very critical when chips are mounted to printed circuit boards, because the silicon chip expands at a different rate than the plastic board. Co. Ltd. of Japan showed its unusual dual-length HTM HTM HyperText Markup (file extension) HTM Hand To Mouth HTM harmful-to-minors HTM Held-to-Maturity HTM High Tide Mark HTM Hazlo tú mismo (Spanish: do it yourself) HTM Hierarchical Temporal Memory (horizontal twin mixer), a type of twinscrew compounding extruder. The dual-length corotating machine was actually developed 12 years ago, when the company was called IPEC IPEC International Programme on the Elimination of Child Labour IPEC International Pharmaceutical Excipients Council IPEC International Power Electronics Conference IPEC International Power Engineering Conference IPEC Integrated Petroleum Environmental Consortium Co. Ltd. It was renamed CTE (Century 21 Engineering) in 1999. The initial compounding section uses wing-shaped, Banbury-style mixing elements, which knead knead tr.v. knead·ed, knead·ing, kneads 1. To mix and work into a uniform mass, as by folding, pressing, and stretching with the hands: kneading dough. 2. the material and can incorporate filler levels of up to 70% magnesium hydroxide magnesium hydroxide: see milk of magnesia. for wire and cable, 80% wood flour Wood flour is finely pulverized wood that has a consistencey fairly equal to sand, but can vary considerably, with particles ranging in size from a fine powder to roughly the size of a grain of rice. or talc, and 70% titanium dioxide for pigment masterbatches. Material then passes a barrier section and a vacuum vent before reaching the single-screw extension of one of the two corotating shafts, which builds up pressure before the die. The design reportedly prevents overworking the material and keeps processing temperatures 10[degrees] to 20[degrees]C lower than conventional twin-screws. The twin-screw part is 28:1; the single screw is 14:1, totaling 42:1 L/D L/D Labor and Delivery L/D Lethal Dose L/D Lift/Drag (ratio) L/D Low Dynamic L/D Limiter/Discriminator L/D Loading / Discharging Rate (shipping) . CTE also launched a combination of a dry-face and a water-ring pelletizer for wood-filled composites. It's very compact and uses air, water, or both for cooling, depending on wood content. CTE has built models with throughputs from 440 to 1760 lb/hr. Good housekeeping Good Housekeeping is a women's magazine owned by the Hearst Corporation, featuring articles about women's interests, product testing by The Good Housekeeping Institute, recipes, diet, health as well as literary articles. C.A. Picard GmbH of Germany showed an inexpensive device for stripping off screw elements frozen onto shafts. Built in China, the FD-System strips elements from shafts of 25 to 140 mm diam. A unit is installed at Picard's Ohio service bureau. Coperion Waeschle showed its Fluidcone Blender, a new static mixer for blending free-flowing powders in silos. Internal baffles split the powder flow into four pie-shaped zones around a small, round core zone. It's retrofittable in place of the silo's conical discharge and fits silos from 3 to 15 ft diam. Dies and pelletizers Black Clawson Converting Machinery launched a new underwater pelletizer die design for low-viscosity materials such as compounds with high EVA Eva to marry winner of singing contest. [Ger. Opera: Wagner, Meistersinger, Westerman, 225–228] See : Prize 1. Eva - A toy ALGOL-like language used in "Formal Specification of Programming Languages: A Panoramic Primer", F.G. content (up to 40%). The Pelletor has a horizontal die plate and modified heat channels close to the die surface to keep holes from freezing off. The die surface is ceramic coated to insulate it from the water's heat sink. Black Clawson will reface Verb 1. reface - put a new facing on (a garment) face - line the edge (of a garment) with a different material; "face the lapels of the jacket" 2. dies (its own or other brands) for water-ring and underwater pelletizers with the high-wear ceramic facing or other facing materials if required. Coperion Werner & Pfleiderer showed a new SK series quick-change strand die in which the die plate is held by clamping sections on the top and bottom that open with six half-turn screws instead of fully threaded bolts. The clamps hang on hooks when the die plate is removed. Econ GmbH in Austria showed underwater pelletizer dies coated with a few millimeters of Ceconid, a mixture of resin and proprietary minerals that is said to be harder than diamond. The first test samples reportedly showed no abrasion after pelletizing Pelletizing or pelletising is the process of compressed or molding of product into the shape of a pellet. A large range of different products are pelletized including chemicals, iron ore, animal compound feed, and more. glass-filled material. NEED TO KNOW MORE.? For more information, enter PTDirect code at www.ptonline.com Black Clawson Converting Machinery LLC (Logical Link Control) See "LANs" under data link protocol. LLC - Logical Link Control , Fulton, N.Y. (315) 598-7121 * PTDirect: 683CT Coperion Corp. Ramsey, NJ. (201) 327-6300 * PTDirect: 789LZ CTE Co. Ltd., Tokyo, Japan +81 (3) 3351 6500 * PTDirect:982CF Econ GmbH, Pasching, Austria +43 (7229) 876 800 * PTDirect: 296BT Leistritz, Somerville, NJ. (908) 685-233 * PTDirect: 731HD C.A. Picard Surface Engineering Inc., Elyria, Ohio (440) 366-5400 * PTDirect: 115XX |
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