Debinding process for removing an organic binder from a powder c

Details Debinding process for removing an organic binder from a powder c Debinding process for removing an organic binder from a powder c

1990-10-03

1993-12-21

Derrington,, James

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 63, 264344, C04B 3564

Patent

active

052718778

ABSTRACT:
A process of debinding a powder compact formed from a mixture of a sinterable powder and an organic binder utilizes a furnace for heating therein the powder compact at a pressure lower than an atmospheric pressure in order to remove an excess amount of the organic binder. A control is made to vary the furnace pressure and/or a heating rate in accordance with a monitored parameter so as to effectively and successfully removed an excess amount of the organic binder which would cause an unacceptable defect in a finished product. The parameter is selected as indicative of a condition of the furnace or a cracked gas being generated by decomposition of the organic binder, and includes, for example, a furnace temperature, density, volume, or the other measurable characteristics of the cracked gas.

REFERENCES:
patent: 2939199 (1960-07-01), Strivens
patent: 4795598 (1989-01-01), Billiet
patent: 5078929 (1992-01-01), Matsumae
patent: 5122326 (1992-06-01), Jackson

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