Steam chest mold for making a rectangular-section foam block

Details Steam chest mold for making a rectangular-section foam block Steam chest mold for making a rectangular-section foam block

1988-01-11

1989-04-25

Hart, Charles

Plastic article or earthenware shaping or treating: apparatus

With mechanical means forming or expanding pores

264 51, 425388, 4254051, 425407, B29D 2700

Patent

active

048237655

ABSTRACT:
The mold for making a rectangular foam block from a plurality of blowable and sinterable plastic pieces, especially foamed polystyrene pieces, with the help of steam comprises a rectangular inner mold with a plurality of inner mold walls movable from each other and an outer mold tightly closable surrounding the inner mold having at least one steam inlet and an air evacuation and vacuum pump connector pipe. This mold is especially easy to construct when the outer mold comprises a pipelike pressurizable container with a front mold wall comprising a pressure-tight door and with a block ejector mounted in a rear mold wall which can be pushed approximately perpendicularly to the rear mold wall into the inner mold.

REFERENCES:
patent: 3941528 (1976-03-01), Cotterell
patent: 4327045 (1982-04-01), Nishikawa et al.
patent: 4439122 (1984-03-01), Besse et al.
patent: 4695416 (1987-09-01), Treffner et al.
"Expandierbares Polystyrol" EPS-VDI Verlag GmbH, pp. 68 & 69, (date unknown).

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