Apparatus for continuously producing foamed sheets

Details Apparatus for continuously producing foamed sheets Apparatus for continuously producing foamed sheets

1977-04-06

1978-11-07

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Radiated energy

264 25, 425388, 425817C, 425DIG53, B29D 2700

Patent

active

041243447

ABSTRACT:
A plastic foamed sheet of excellent quality is produced by using an apparatus comprising a preheating chamber including a conveyor means for continuously conveying a thermoplastic resin sheet containing a heat-decomposable blowing agent in the horizontally supported state and a heating means for heating the sheet to a temperature lower than the decomposition temperature of the blowing agent, and a foaming chamber connected to the preheating chamber and including a heating means for heat-foaming the sheet as it is continuously conveyed while being perpendicularly suspended from the terminal end portion of the conveyor means.

REFERENCES:
patent: 3475522 (1969-10-01), Garibian et al.
patent: 3762845 (1973-10-01), Sagane et al.

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