Glass compression molding machine and machining chamber therefor

Details Glass compression molding machine and machining chamber therefor Glass compression molding machine and machining chamber therefor

1993-05-28

1999-12-21

Silverman, Stanley S.

Glass manufacturing

Glassworking or preform by or with reheating means

Mechanical means to reshape preform

65268, 65269, 65157, 425414, 425416, 425423, C03B 2300, C03B 2304, C03B 2320, A01J 2100

Patent

active

060033398

ABSTRACT:
A molding die assembly includes an upper molding die and a lower molding die facing the upper molding die with provision for their alignment. The upper molding die includes an upper core, while the lower molding die includes a hollow cylinder and a lower core. The upper core has one of the molding surfaces that corresponds to a molding, while the lower core has the other molding surface corresponding to the molding. The lower core slides in the cylinder and defines a cavity in cooperation with the upper core. A clamping device applies a clamping force to the upper molding die and the lower molding die, and a compression device applies a compressive force between the upper core and the lower core. The clamping force is generated between the upper molding die and the lower molding die but not between the upper core and the lower core so that no clamping force is applied to the preform. Hence, if the upper platen and the lower platen are not parallel or if the volume of the preforms varies, surface accuracy and shape accuracy of the molding are still achieved.

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