Apparatus for thermoforming dome-shaped actuating elements for m

Details Apparatus for thermoforming dome-shaped actuating elements for m Apparatus for thermoforming dome-shaped actuating elements for m

1984-05-09

1985-08-06

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including both heating and cooling means

425397, 425398, 425400, 425DIG48, B29C 1700

Patent

active

045335559

ABSTRACT:
An apparatus is provided for thermoforming a plurality of protrusions in a plastic sheet. The thermoforming apparatus comprises a pneumatic press having a pair of male and female die plates with respective projections and cavities. One of the die plates is heated. The other die plate is cooled. The cooled die plate is provided with vacuum to ensure that the thermoformed plastic sheet is held against the cooled die plate upon the opening of the press to, in turn, ensure the cooling of the plastic sheet prior to its removal.

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