EXTRUSION DIES INC

Different types of dies are required to produce the many different shapes produced by extruders worldwide. Table 17.3 is an example of the few types of dies designed and manufactured by Extrusion Dies, Inc. 

A Fast-Gap system (trade mark of Extrusion Dies, Inc.) on a die extends the adjustment range, and eliminates the parting line of a removable lower lip. This device provides an additional 5 mm of adjustment ( 2.5 mm), by simply turning a hex headed power screw on the end of the die. The operator can now also flex open the lip to clean it, and then close it back to the run position, saving time and reducing scrap. 

Extrusion Dies Inc., 911 Kurth Road, Chippewa Falls, Wisconsin 54729-1443, USA... 

W. A. Gifford Extrusion Dies, Inc., Chippewa Falls, Wisconsin... 

Levy, S. Carley, J.F. Extrusion dies for specific product lines. In Plastics Extrusion Technology Handbook, 2nd Ed. Industrial Press, Inc., 1989 96-139. 

Masterflex, Extrusion dies, Production Components Cloeren Inc. peristaltic tubing pumps and pump controllers, Barnant Co. Masterflow, Coextrusion block, Production Components Cloeren Inc. 

As the plastic exits the die it is cooled on a conveyer. In addition to round pipe, extrusion lends itself to other shapes that are long and continuous, such as window moldings. Top companies in plastic pipe manufacture include Royal Group, Inc., J-M Manufacturing (doing business as JM Eagle) and CertainTeed. 

Another interesting long glass fiber-reinforced thermoplastic BMC operation was developed by Composite Products, Inc. (219,220). Basically it is an on-site extrusion and molding operation. The long glass fibers, up to 50 mm long, are fed downstream into the extruder. The compound exits the open die as a log and is stationed in the accumulator until compression molded. Thermoplastic SMC process has been recently patented by ThermoComp (221). 

W. W. Bainbridge and B. Heise, in Design and Construction of Extrusion Blow Molds, National Symposium—Plastics Molds/Dies, Oct. 1977, Society of Plastics Engineers, Inc., Palisades Section, Brookfield Center, Conn. SPE Design RETEC 21-1. 

Fig. 19.34. Formation o1 sheet by extrusion through a circular die (blown bubble extrusion). Ingredients are resins, stabilizers, pigments, and other additives. (Encyclopedia of Polymer Science and Technology, Vof. 6. H. G. Mark and W. G. Gaylord. Eds.. ir)terscienc Publishers, 1S66 copyright 1968 by John Wy/ey Sons. Inc. and used by permission of the copyright owner.)...

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