Shaping apparatus using a liquid forming medium

Details Shaping apparatus using a liquid forming medium Shaping apparatus using a liquid forming medium

1991-09-17

1993-11-16

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including shaping means comprising fluid pressure contacting...

425394, 4254051, B29C 5110

Patent

active

052618080

ABSTRACT:
A shaping apparatus utilizing liquid pressure includes a base constructed of a single member and including a lower die and a lower clamp which surrounds the lower die and is integral with the lower die, an upper clamp movable in a vertical direction above the lower clamp, and an upper die or punch movable in the vertical direction above the lower die. The upper die has a lower surface with a configuration to which a workpiece to be formed is pressformed. The lower surface of the upper die and the upper surface of the lower die define a cavity filled with liquid except for a small air pocket when the upper die is lowered. When the upper die is lowered, the upper die contacts and deforms the workpiece. At the same time, the liquid is contained under pressure in the cavity and presses the workpiece against the lower surface of the upper die so that the workpiece is formed precisely to the configuration of the lower surface of the upper die by the contained liquid.

REFERENCES:
patent: 2516373 (1959-07-01), Ehlert et al.
patent: 3007206 (1961-11-01), Griswold
patent: 3439078 (1969-04-01), Whiteford
patent: 4883632 (1989-11-01), Goto et al.

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