Controlling overheating of vacuum mold used to shape glass sheet

Details Controlling overheating of vacuum mold used to shape glass sheet Controlling overheating of vacuum mold used to shape glass sheet

1980-03-18

1981-10-27

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65106, 65107, 65268, 65273, 65287, 65291, C03B 25035

Patent

active

042971187

ABSTRACT:
Glass sheets are shaped while heat-softened by engaging a surface thereof against an apertured surface of a vacuum mold within a heating furnace. After releasing the glass sheet for further processing, the vacuum mold is removed from the furnace without the glass sheet for cooling and returned to the furnace in sufficient time to engage the next glass sheet to be shaped. This invention avoids the need to overheat the glass to compensate for cooling that occurs when a mold engages a glass sheet outside a furnace to shape the latter without losing control of the maximum temperature to which the mold is subjected during a glass sheet shaping program.

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