Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Conveying or aligning particulate material
Patent
1997-10-08
1999-04-27
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Conveying or aligning particulate material
264442, 264517, 264109, 4251742, 425 77, 425 78, 425258, 425425, 419 66, B29C 4302
Patent
active
058978267
ABSTRACT:
A powder feed system for delivering a quantity of particulate material to a die cavity of a powder press is provided. The powder press has a table-like platen surface which is flush with and surrounds a die in which the die cavity sits, an upper punch appending from an upper ram and a lower punch. The powder feed delivery system includes a receptacle for receiving and delivering particulate material to the cavity. The receptacle has an ingress through which particulate material is received under pressure and an egress for registering with the interior of the cavity and through which particulate material is delivered under pressure from a feed conduit to the cavity. The feed conduit is attached at a first end to the receptacle ingress. At least one pressure generator is attached to a top end of a pressure vessel attached at a second end to the feed conduit. The pressure generator provides supra atmospheric pressure to push particulate material from the vessel into the die cavity when the die cavity is sealed from the atmosphere. The pressure generator is optionally used to fluidize the particulate material within the die cavity to create a substantially uniform density distribution of the particulate material within the cavity. At least one exhaust portal is provided for releasing pressure from within the die cavity.
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Beane Glenn L.
Lashmore David S.
Materials Innovation Inc.
Theisen Mary Lynn
Wasserman Fran S.
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