Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...
Patent
1987-07-24
1990-04-03
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Coating or impregnating workpiece before molding or shaping...
264225, 264254, 264255, 264299, 249113, 249141, 2491141, 425 85, B29C 3912, B29C 3926, B29C 4122, B29C 4138
Patent
active
049138685
ABSTRACT:
A method of making a porous mold for pressure slip casting. A surface porous layer is cast which has an average pore diameter of at most 20 microns and a thickness of 5 to 40 mm. An adhesive is applied in a pattern to the rear surface of the surface porous layer to leave an unapplied portion on the rear surface. A coarse porous layer is applied to the adhesive applied and unapplied portions of the rear surface of the surface porous layer which is made of a mixture of liquid resin and a filler of a particle diameter of 0.1 to 5.0 mm at a volume ratio of 15 to 50:100. The coarse porous layer has a thickness of 5 to 30 mm. A sealing adhesive is applied to the surface of the coarse porous layer and means is applied for passage of water from and air into the coarse porous layer.
REFERENCES:
patent: 3243860 (1966-04-01), Whittaker et al.
patent: 3723584 (1973-03-01), Nussbaum
patent: 3993727 (1976-11-01), Skriletz
patent: 4413966 (1983-11-01), Mills
Ito Haruyuki
Matsumoto Akio
Durkin II Jeremiah F.
Toto Ltd.
Woo Jay H.
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