Apparatus for producing thermoplastic resin foam

Details Apparatus for producing thermoplastic resin foam Apparatus for producing thermoplastic resin foam

1984-02-28

1986-12-02

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Immersed shaping orifice discharging directly into liquid...

Additional downstream means for treating product by fluid

264 459, 264 461, 264102, 264514, 264566, 264568, 425183, 425381, 425466, 425DIG19, B29C 4700, B29C 4792

Patent

active

046261834

ABSTRACT:
Apparatus including an extruder, a die member and a vacuum device connected in series. The vacuum device includes a chamber and a device at at least the outlet thereof to air-tightly seal the chamber around the extruded mass of foamed thermoplastic resin. The air-shielding or sealing device is an annular tube which is inflatable radially inwardly having a flexible inner face which seals around the extruded mass. A durable, abrasion-resistant, flexible protective sheet can be interposed between the mass and the tube.

REFERENCES:
patent: 3135998 (1964-06-01), Fowler, Jr. et al.
patent: 3822331 (1974-07-01), Cogliano
patent: 4247271 (1981-01-01), Yonekura et al.
patent: 4462242 (1984-07-01), Morgenthaler

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