Multiple zone heating of molds

Details Multiple zone heating of molds Multiple zone heating of molds

1985-10-18

1986-11-11

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

13762533, 264302, 264327, 264DIG60, 425185, 425435, B29C 4118, B29C 4146

Patent

active

046219951

ABSTRACT:
A molding machine has a valve assembly that includes means for selectively heating or cooling a mold by controlling flow of gas through an array of gas impingement jets disposed adjacent the backside of a mold surface to regulate the temperature over respective first and second areas of the mold surface. Gas heating and cooling circuits include two drive cylinder regulated plate valves for supplying gas at the gas impingement jet nozzles associated with the mold.

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patent: 3315016 (1967-04-01), Wersosky et al.
patent: 3388429 (1968-06-01), Barnett et al.
patent: 3416193 (1968-12-01), Freeborn
patent: 3492307 (1970-01-01), Hoskinson
patent: 3578066 (1971-05-01), Vox
patent: 3590435 (1971-07-01), Dunham et al.
patent: 3680629 (1972-08-01), Gaudreau et al.
patent: 3728429 (1973-04-01), Colby et al.
patent: 4389177 (1983-06-01), Colby

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