Twin-sheet thermoforming apparatus with hydraulic array mold sup

Details Twin-sheet thermoforming apparatus with hydraulic array mold sup Twin-sheet thermoforming apparatus with hydraulic array mold sup

1996-02-23

1998-09-01

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Preform assembly means and means for bonding of plural...

Reshaping means utilizing fluid pressure directly contacting...

425150, 4253421, 425388, 425451, 4254512, B29C 5146, B29C 5138

Patent

active

058008462

ABSTRACT:
An upper thermoforming mold is positioned above a lower thermoforming mold on a platen. The platen is provided with an array of position-controlled hydraulic cylinders. A controller drives the array of cylinders to uniformly advance the two molds together once heated sheets of thermoplastic material have been formed thereon. By controlling the position of each actuator, forces may be applied at different levels to the platen to bring about uniform molded parts and reduced deflection of the molds.

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