Press for forming bodies

Details Press for forming bodies Press for forming bodies

1991-03-04

1992-02-04

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For press shaping surface

425253, 425346, 425398, 425412, B29C 4300

Patent

active

050855700

ABSTRACT:
A press for making rigid bodies out of fluent particles has, a cylinder block formed with a plurality of parallel cylinder bores opening into the chamber, respective pistons axially displaceable in the bores of the block, and respective little piston plungers fixed releasably to and projecting outward from the pistons. Respective little dies form little cavities in which the plungers are complementarily engageable. A holder positions workpieces of the particles in partially compacted condition in line with the cavities of the little dies so that respective little pushout plungers can push the workpieces out of the holders into the respective dies. A counter piston is displaceable hydraulically against the cavities after the workpieces have been pushed thereinto. The cylinders of the block are then pressurized to push the little piston plungers into the cavities and compress the workpieces therein. Instead of the little piston plungers and dies it is possible to mount a bridge element on two of the pistons instead of two of the little pistons and a big piston plunger on the bridge element. In this case a big die is mounted instead of at least some of the little dies and forms a cavity in which the big piston plunger is complementarily engageable. Here also a big pushout plunger instead of at least some of the little pushout plungers is operable like the little pushout plungers to push a workpiece out of the holder into the big die.

REFERENCES:
patent: 3545045 (1970-12-01), Vinson
patent: 4050865 (1977-09-01), Drostholm et al.
patent: 4139593 (1979-03-01), Holz et al.
patent: 4490103 (1984-12-01), Vogt
patent: 4968468 (1990-11-01), Leinweber

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