Method and die apparatus for producing plastic molding having fo

Details Method and die apparatus for producing plastic molding having fo Method and die apparatus for producing plastic molding having fo

1994-11-08

1996-03-19

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 425112, 425817R, B29C 6500, B29C 6578

Patent

active

055001696

ABSTRACT:
A method for producing a plastic molding having a foam with a skin on an outer surface of a core wherein a foaming material is foamed in a space defined between a skin member and the core, disposed within a molding die assembly having an upper die and a lower die includes disposing the skin member which is provided with side portions and recessed grooves at the edge portions thereof, on the lower die of the molding die assembly; fitting edge holders projecting from the lower die into the recessed grooves of the skin member; disposing the core which is provided with a recess in which the skin member is received, in the molding die assembly; pouring the foaming material in a space between the skin member and the bottom surface of the core to foam the foaming material; and retracting the edge holders into the lower die during the foaming before the foaming operation is completed. The disclosure is also directed to a molding die apparatus for producing such a plastic molding.

REFERENCES:
patent: 4793784 (1988-12-01), Belleville et al.
patent: 5006288 (1991-04-01), Rhodes, Jr et al.

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