Coextrusion apparatus

Details Coextrusion apparatus Coextrusion apparatus

1985-02-22

1986-03-25

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Extrusion shaping means

4251331, B29F 304, B29F 310

Patent

active

045780242

ABSTRACT:
A coextrusion head for producing a generally tubular elastomeric ply made up of first and second concentric tubular streams of elastomeric material having interposed, adjacent to their interface, a closely spaced array of parallel reinforcing elements wherein the coextrusion head includes a reinforcing element guide subassembly including a generally annular guide element as well as a mechanism for individually and independently directing and accurately positioning a circular array of uniformly spaced individual reinforcing elements. A generally annular inner die assembly cooperates with the annular guide element to form a first distribution channel and a generally annular outer die assembly also cooperates with the annular guide element to form a second distribution channel, with the guide element cooperating with the inner and outer die assemblies to produce concentric first and second tubular extrudate paths which thereafter merge into a third such path with the individual reinforcing elements being introduced into the interface between the first and second tubular streams of elastic material as they merge into a third tubular stream so as to produce the tubular elastomeric reinforced ply. A method for coextruding an annular seamless component of reinforced elastomeric material is also presented.

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