Apparatus for producing thermoplastic resin foam

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

B - Operations, Transporting

29

C

18/663

B29C 67/20 (2006.01)

Patent

CA 1223415

ABSTRACT OF THE DISCLOSURE 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.

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