Process for moulding composite plastic material

Details Process for moulding composite plastic material Process for moulding composite plastic material

1992-12-16

1994-02-08

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264163, 264255, 264321, 264553, B29C 6720

Patent

active

052846083

ABSTRACT:
In the moulding of composite plastic material, in particular of foamed polystyrene coupled with rigid polystyrene sheet, the rigid material (2) is preformed, with the preformed portion being simultaneously separated from the starting material, and the preformed shaped portion is transferred to the preforming half-mould (33) at the moulding station, in which a formed material is moulded by means of sintering and pulsed steam action on the preformed rigid material. The resulting piece is brought back to the preforming station (1) and a further portion of rigid material (2) is preformed on the foamed material, and this portion is then thermoset inside the moulding mould (3) on the foamed material, thus generating an article with two opposite surfaces made of a rigid material, between which the foamed material is sandwiched.

REFERENCES:
patent: 2802766 (1957-08-01), Leverenz
patent: 2977639 (1961-04-01), Barkhuff, Jr. et al.
patent: 3309439 (1967-03-01), Nonweiler
patent: 3391823 (1968-07-01), Tijms
patent: 3405026 (1968-10-01), Roberts
patent: 3414456 (1968-12-01), Roberts
patent: 3419455 (1968-12-01), Roberts
patent: 3420729 (1969-01-01), Roberts
patent: 3455483 (1969-07-01), Inklaar
patent: 4405537 (1983-09-01), Spengler
Patent Abstracts of Japan, vol. 4, No. 169 (M-43) (651), Nov. 1980.

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