Thermoforming method and apparatus

Details Thermoforming method and apparatus Thermoforming method and apparatus

2007-04-17

2007-04-17

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Immersed shaping orifice discharging directly into liquid...

Additional downstream means for treating product by fluid

C425S143000, C425S387100, C425S388000, C425S409000

Reexamination Certificate

active

10953041

ABSTRACT:
A thermoforming apparatus having a mold with an internal vacuum chamber and a quench for cooling a thermoplastic sheet while it remains on the mold. Because the quench cools the sheet, conventional cooling lines are eliminated from the mold. One method of using the thermoforming apparatus includes pushing a heated sheet towards the mold with a plug assist, drawing the heated sheet over the mold, creating a partial vacuum in the vacuum chamber of the mold to maintain the sheet on the mold and quenching the sheet on the mold in a quenching tank by moving the quenching tank to the mold.

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