Method for manufacturing plastic foam

Details Method for manufacturing plastic foam Method for manufacturing plastic foam

1987-06-17

1989-04-25

Anderson, Philip

Textiles: cloth finishing

Singeing

Articles

249 78, 249161, 264 455, 264 54, 264 55, 264DIG60, 4251748E, 425417, 425817R, C08J 906, B29C 6504, B29C 3910, B29C 6722

Patent

active

048246174

ABSTRACT:
A method for manufacturing a plastic foam, wherein a plastic compound with chemical foaming agent is charged in molding cavity which is defined by a pair of upper and lower die cavities and wherein the plastic compound is subject to a dielectric heating, so that the chemical foaming agent decomposes. One of the cavity surfaces is movable to vary the volume of the molding cavity in accordance with the expansion of the plastic compound, so that the movable cavity surface is kept in contact with the plastic compound which expands during heating.

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