Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1983-06-23
1985-04-23
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264 15, 425114, 4251331, B29F 310
Patent
active
045129444
ABSTRACT:
Extruder tooling for directing plastic materials to enclose a conductor (26) being advanced along a path of travel through a core tube (97) and aligned dies includes disc-like flow passages (107, 129) which are disposed concentrically about and perpendicularly to the conductor. This arrangement minimizes conductor tension in a pressure extrusion arrangement by significantly reducing the length of the plastic-to-conductor contact within the extruder. The length and width of each flow passage normal to and along a path of travel are sufficient to provide a uniform distribution of plastic material circumferentially about the conductor and to dissipate stresses which have been induced in the plastic materials. In a tubing arrangement, the length of a cantilevered portion of the core tube is reduced significantly which results in improved concentricity of the plastic material about the conductor.
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Astfalk Greg
Dougherty Timothy S.
Viriyayuthakorn Montri
AT&T - Technologies, Inc.
Somers E. W.
Thurlow Jeffery
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