Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1995-08-07
1998-06-23
Simmons, David A.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
264221, 264225, 264313, 264317, 264337, 264517, 264570, 264DIG35, 264DIG44, C04B 3564
Patent
active
057701369
ABSTRACT:
A method for consolidating powdered material to near net shape and full density is provided. The method includes the steps of: mixing a particulate material with an organic or inorganic binder to form a mold material; shaping the mold material into a mold having a shape and including an external surface and an interior cavity and being of sufficient solidity to maintain its shape yet being compressible under pressure; filling the interior cavity with a powdered material to be consolidated; heating the mold with the powdered material therein to form a heated filled mold; applying pressure to the external surface of the mold sufficient to compress the mold material and transfer a pressurizing force to the powdered material within the mold cavity so as to consolidate the powder and form an article; and removing the article from the mold. In an alternative method, the mold material is made of a particulate material which is held in the shape of the mold by a vacuum.
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Jones Kenneth M.
Simmons David A.
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