Method of forming a cross linked foamed polyolefin article

Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Cutting and uniting cut parts

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Details

264153, 264276, 264308, 264321, 26433117, B29C 4318, B29C 4320

Patent

active

052737020

ABSTRACT:
A method for forming soft, resilient, smooth, energy dissipating articles from foamed partially cross-linked polyolefins wherein sheet stock is cut into a preform and the preform while at room temperature is positioned within a mold cavity formed by partible mold halves. The preforms and the cavity of the molds are so arranged and constructed that after molding there is no flashing needing trimming because the polyolefin is substantially confined within the cavity without any lateral projection into the parting surfaces of the mold.

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"Crossed-Linked Polyolefin Foams", Allen, J. of Cellular Plastics, Jan./Feb. 1984, pp. 70-71.

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