Method of constructing mold for forming plastic foam

Details Method of constructing mold for forming plastic foam Method of constructing mold for forming plastic foam

1975-04-25

1976-05-25

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

249112, 264 41, 264226, 264338, 264DIG83, B23P 1900

Patent

active

RE0288268

ABSTRACT:
A mold for forming plastic foam parts in which an injection-molded plastic member forms a molding surface of the foam molding cavity against which foam plastic is adapted to be molded. The plastic member is preferably injection molded in a metal molding die from either polyethylene or polypropylene so that its molding surface is the reverse of the exterior surface of the plastic part to be foam molded therein. Vent passages and sealing beads may be integrally formed with the injection-molded member.

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patent: 3678987 (1972-07-01), Kydd
patent: 3751540 (1973-08-01), Prahl et al.
patent: 3785039 (1974-01-01), Huffaker et al.

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