Precision control of the thickness of heat-softenable material

Details Precision control of the thickness of heat-softenable material Precision control of the thickness of heat-softenable material

1987-11-06

1988-12-20

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264280, 264348, B29C 4322

Patent

active

047924268

ABSTRACT:
A process for precisely controlling the thickness of a heat-softenable sheet material (52) comprising heating the material to bring it to a softened condition, compressing the material while in the softened condition to the desired thickness or somewhat less and then cooling the material to a temperature below its softening point so that it sets while precisely maintained at the desired thickness. The material is cooled by passing it between substantially parallel cooling plate (32,34) rigidly spaced with a separation equal to the desired thickness of the material.

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patent: 4417866 (1983-11-01), Sitzler
patent: 4474845 (1984-10-01), Hagerman

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