Method for the manufacture of thin-walled shaped articles of cry

Details Method for the manufacture of thin-walled shaped articles of cry Method for the manufacture of thin-walled shaped articles of cry

1978-09-27

1980-11-18

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264544, 264551, 264151, 264153, 2642105, 264237, 2642902, 264327, B29D 720, B29F 308

Patent

active

042345367

ABSTRACT:
A method of manufacturing thin-walled articles by thermoforming from crystalline thermoplastic sheet or web material wherein the sheet or web is rapidly precooled from extrusion temperature, and the outer surface layers reheated prior to thermoforming.

REFERENCES:
patent: 3042972 (1962-07-01), Lafferty
patent: 3454693 (1969-07-01), Crenshaw
patent: 4039609 (1977-08-01), Thiel et al.
patent: 4105386 (1978-08-01), Thiel et al.

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