Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold
Patent
1988-01-20
1989-04-18
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Mold opening and closing means and segmented female mold
4254512, 425541, 425589, 425590, 425DIG223, B29C 4567, B29C 4956
Patent
active
048222747
ABSTRACT:
A hydraulic clamp unit for a molding apparatus has a pair of opposed complimentary mold halves attached accordingly to a pair of opposed platens suspended on roller guides and moving toward each other into engagement of the mold halves to form a mold cavity surrounding a molded article of a thermoplastic material. The unit is provided with main clamp cylinders of a pull type and having piston rod chambers pressurized to exert pressure on the platens during formation of the article. Rapid movement of the platens is achieved by means of kicker cylinders having piston chambers and piston rod chambers communicating with each other. The main cylinders are locked to one of the platens by means of hydraulic mechanisms.
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Chan Harry
Yi Basilio
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