Molding process and apparatus

Details Molding process and apparatus Molding process and apparatus

1987-09-14

1989-07-25

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 405, 264 452, 264 54, 264101, 264314, 425149, 425388, 425389, 425817R, B29C 6722, B29C 3512, B29C 3942, C08J 906

Patent

active

048511676

ABSTRACT:
A flow molding process and associated molding apparatus for making plastic parts employing a radio-frequency heating field. In a two-piece mold, a diaphragm is supported thereacross and over a foam plastic compound that is disposed in the bottom half of the mold. A fluid is adapted to be introduced into the mold against the diaphragm. The introduction of this fluid is controlled to initially inject the fluid into the mold to cause deflection of the diaphragm to thus expel substantially all air from the mold and to thereafter extract the fluid from the mold during the heating cycle as the material expands, the extraction causing a vacuum that assists in the plastic foam compound expansion.

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