Mold for thermoforming plastic sheet material

Details Mold for thermoforming plastic sheet material Mold for thermoforming plastic sheet material

1974-06-10

1976-01-13

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

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

Coacting shaping surfaces

249 79, 425DIG208, 425DIG211, B29C 1700

Patent

active

039320960

ABSTRACT:
A molding apparatus for thermoforming plastic sheet material having upper and lower matching molding blocks, each molding block having a thin rigid shell. The shell has a die cavity therein with the exposed face of the shell defining the die cavity surface. A porous body of metallic filler material is contained within the central portion of each molding block and is in contact with the inner surface of the rigid shell. Inlet and outlet means are provided for circulating a coolant fluid through the central portion of each molding block.

REFERENCES:
patent: 2510907 (1950-06-01), Renaud
patent: 3601857 (1971-08-01), Hampel
patent: 3617369 (1971-11-01), Lombardo

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