Apparatus and method for reducing neck waste in a cast vinyl she

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface

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Details

264327, 425435, 425447, 249108, 249111, B29C 4104, B29C 4146

Patent

active

047160039

ABSTRACT:
Apparatus for reducing the waste neck area in a mold of vinyl cast articles such as automotive arm rests, head rests and parts of similar construction includes a powder box of gellable material having a supply spout with its exposed outer surface area covered by a liner of heat insulating material; a waste inlet neck on a heated, machined nickel mold is sealed by the liner when the powder box is joined to the mold. The powder box spout is at room temperature and shields the inlet neck to prevent gel build-up on the inlet neck to effect considerable cost by both a reduction in waste deposits of gel and a reduction in labor required to trim a waste area on the mold. To obtain the coating, the mold is coated with powdered vinyl (hereinafter gellable material) by casting from the powder box to the mold and the excess material is removed from the mold by dumping it from the mold into the powder box.

REFERENCES:
patent: 3059281 (1962-10-01), Visser et al.
patent: 3698849 (1972-10-01), Czerski
patent: 4562025 (1985-12-01), Oray
patent: 4606868 (1986-08-01), Christoph et al.

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