Two-stage fast debinding of injection molding powder compacts

Details Two-stage fast debinding of injection molding powder compacts Two-stage fast debinding of injection molding powder compacts

1989-12-08

1991-07-02

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264345, 419 5, 419 10, 419 44, 419 54, 419 58, C04B 3332

Patent

active

050283677

ABSTRACT:
A process for making molded objects utilizes powder injection molding techniques. Powder is mixed with a binder and then cast into a compact. The compact is then subjected to a first debinding step in the presence of a wicking agent under gentle heating. In this first stage, at least 40% of the binder is removed. Additional binder is then removed in a subsequent higher temperature stage to produce a compact which is free of binder and free of cracks.

REFERENCES:
patent: 4113480 (1978-09-01), Rivers
patent: 4197118 (1980-04-01), Wiech
patent: 4305756 (1981-12-01), Wiech
patent: 4404166 (1983-09-01), Wiech
patent: 4704242 (1987-11-01), Bandyopadhyay
patent: 4713206 (1987-12-01), Matsuhisa

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