Die system for thermoforming thermoformable sheet material

Details Die system for thermoforming thermoformable sheet material Die system for thermoforming thermoformable sheet material

1991-12-04

1992-11-10

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Including both heating and cooling means

264500, 264519, 264553, 4253871, 425388, B29C 5100

Patent

active

051621240

ABSTRACT:
Apparatus is disclosed for thermoforming a thermoformable sheet material into a predetermined thermoformed shape. A graphic display is provided upon one side of the thermoformable sheet material, and the apparatus includes first and second die members between which the thermoformable sheet material is secured. A forming cavity is defined within the first die member for accommodating a portion of the thermoformable sheet material when the thermoformable sheet material portion is forced into the forming cavity, and the second die member is provided with a heating plate for heating the thermoformable sheet material to a predetermined temperature in preparation for the thermoforming formation of the thermoformable sheet material into the thermoformed shape within the forming cavity of the first die member. The heating plate includes a recessed portion which is positionally aligned with the graphic display portion of the thermoformable sheet material so as to effectively heat insulate the graphic display portion of the thermoformable sheet material and thereby maintain the graphic display portion of the thermoformable sheet material at a second temperature level which is less than the predetermined temperature in order to prevent any variation of distortion of the graphic display portion of of the thermoformable sheet material during formation of the thermoformable sheet material into the thermoformed shape.

REFERENCES:
patent: 3386503 (1968-06-01), Corning et al.
patent: 3484518 (1969-12-01), Ignell
patent: 3505441 (1970-04-01), Goetgheluck
patent: 4162884 (1979-07-01), Vetter
patent: 4234373 (1980-11-01), Reavill et al.
patent: 4397804 (1983-08-01), Medwed

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