Method for molding powder under compression

Details Method for molding powder under compression Method for molding powder under compression

1992-08-07

1993-08-10

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Plural, intermittent pressure applying

264123, 425345, 425353, B29C 4308

Patent

active

052346463

ABSTRACT:
A method for molding powder under compression by use of a compression molding machine including a horizontally supported turntable provided with bores vertically extending therethrough, and upper pressure rods and lower pressure rods respectively positioned above and below the respective bores, the upper end portion of each lower pressure rod being fitted in the corresponding bore. The method includes subjecting powder contained in each bore to preliminary compression by dropping the corresponding upper pressure rod into the bore by gravity before the compression molding operation.

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patent: 4601866 (1986-07-01), David et al.
patent: 4832880 (1989-05-01), Staniforth

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