Apparatus for producing pressings provided with channels from po

Details Apparatus for producing pressings provided with channels from po Apparatus for producing pressings provided with channels from po

1989-04-27

1991-08-13

Heitbrink, Jill L.

Plastic article or earthenware shaping or treating: apparatus

Plural shaping plungers or rolls coacting with a single...

249 65, 249178, 249183, 4254051, 4254052, 425417, 425440, B28B 300, B30B 502

Patent

active

050392964

ABSTRACT:
Apparatus 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: 20460 (1937-08-01), Jeffrey
patent: 3015855 (1962-01-01), Merkel
patent: 4128375 (1978-12-01), Schubart
patent: 4473526 (1984-09-01), Buhler et al.

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