Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Stratified or layered articles
Patent
1990-05-21
1992-03-31
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Stratified or layered articles
264119, 264120, B29C 4314
Patent
active
051006014
ABSTRACT:
The present invention pertains to a process and devices for producing beam-shaped moldings from fine plant parts mixed with binders in molding presses. Based on the discovery that the degree of compaction of the core of such moldings decreases with increasing cross section of the moldings, it is suggested in the present invention that the core zone of the molding be formed by an additional amount of fine parts moved there and compacted deliberately, which amount of material acts reactively as a compression zone to the moveable walls surrounding it during the compaction of the molding. Compaction of the molding over its entire cross section and at the same time particularly great compaction of the peripheral zones of the molding are thus achieved. The strength and the bending resistance of such moldings are particularly high, and such moldings are therefore also suitable for forming railroad ties.
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Heggenstaller Anton
Spies Xaver
Anton Heggenstaller GmbH
Theisen Mary Lynn
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