Extrusion molding process and apparatus

Details Extrusion molding process and apparatus Extrusion molding process and apparatus

1997-06-16

2000-02-22

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Perforation by differential fluid pressure; or smoothing,...

264532, 264526, 294211, B29C 4962

Patent

active

060276835

ABSTRACT:
An extruded tubular molding is clamped at upper and lower portions thereof to form an air-tight space therebetween and thereafter compressed within two corresponding halves of a molding die and molded into the configuration of a final product. The lower portion of the molding is first clamped and lowered to stretch the molding downwardly prior to clamping the upper portion and compressing the molding in the molding die.

REFERENCES:
patent: 1409154 (1922-03-01), Davis
patent: 2975472 (1961-03-01), Colombo
patent: 3450805 (1969-06-01), Chesser
patent: 3896648 (1975-07-01), Schertenleib
patent: 4092389 (1978-05-01), Sakurai
patent: 4116608 (1978-09-01), Uhlig
patent: 4143453 (1979-03-01), Taluba
patent: 4153408 (1979-05-01), Albert et al.
patent: 5253995 (1993-10-01), Romstad et al.

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