Method and apparatus for measuring and controlling thermoplastic

Details Method and apparatus for measuring and controlling thermoplastic Method and apparatus for measuring and controlling thermoplastic

1988-03-09

1989-05-23

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264 51, 264321, 425141, 425144, 425817C, B29C 6722, B29C 5146, B29C 5142

Patent

active

048328855

ABSTRACT:
A method and an apparatus for controlling foam sheet blow-up in a thermoformer oven. Control of the oven operation is achieved through monitoring the measured blow-up of a material which being heated in the thermoformer oven in a forming station or thermoformer, such as by a linear variable differential transformer, in order to adjust the thickness of the plastic material by regulating the temperature of the oven prior to the conveyance of the material into the molding or forming station.

REFERENCES:
patent: 3711584 (1973-01-01), Sagane et al.
patent: 3801244 (1974-04-01), Eisenberg
patent: 4213925 (1980-07-01), Kiyono et al.
patent: 4244897 (1981-01-01), Moon

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