Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1985-12-09
1987-04-14
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264149, 264150, 264173, 264174, 425114, 4251311, 425380, 425462, B29C 4702
Patent
active
046577181
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 the 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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Sicka Richard W.
Tompkins Dale A.
Ruf Ernst H.
The Firestone Tire & Rubber & Company
Thurlow Jeffery
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