Method for producing porous shaped products

Details Method for producing porous shaped products Method for producing porous shaped products

1982-11-23

1984-07-17

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Projecting particles in a moving gas stream

264126, B27I 500

Patent

active

044605307

ABSTRACT:
A method for producing a porous plastic molded product of uniform, predictable porosity throughout. A fluidized airstream of moldable plastic powder is formed. Water may be injected into said fluidized powder airstream for maintaining said powder in a uniform, fluidized dispersion. The moisturized, fluidized, powder airstream is injected into a cavity of a closed mold to fill said mold cavity with said powder. The mold is maintained at a temperature and for a time sufficient to at least partially fuse said powder particles together without melting said particles, thereby to form a porous, plastic molded product. The mold is partially separated for cooling the product which is then discharged from the mold. The product may be further cured by heating the molded product in an oven at a temperature and for a time sufficient to cure said molded product without melting said plastic or glazing said product.

REFERENCES:
patent: 3048537 (1962-08-01), Pall et al.
patent: 3099045 (1963-07-01), Honkanen
patent: 4108939 (1978-08-01), Anderson et al.

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