Process for producing press molded articles provided with channe

Details Process for producing press molded articles provided with channe Process for producing press molded articles provided with channe

1987-12-03

1989-08-01

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Bulk deposition of particles by differential fluid pressure

264102, 264109, 264314, 4254052, B28B 300, B30B 502

Patent

active

048531707

ABSTRACT:
A method for producing press-molded articles having a plurality of cavities therein includes a mold cavity which can be filled with a particulate molding compound, which mold cavity contains rods sheathed with expandable tubes which can be expanded by means of a fluid under pressure conveyed into the space between the rods and the tubes: this causes compaction of the molding compound to form the pressed article, which can be removed from the mold after reduction of the fluid pressure to allow detumescence of the expandable tubes and withdrawal of these from the mold cavity so that the mold cavity can be opened to remove the shaped pressed article.

REFERENCES:
patent: 3561079 (1971-02-01), Anderson
patent: 4128375 (1978-12-01), Schubart

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