Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1977-05-04
1979-06-19
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264319, B29C 300, B29C 112, B28B 100, B28B 706
Patent
active
041586913
ABSTRACT:
A device is disclosed for forming blanks from pulverulent porcelain mater which blanks have a foot piece and sloping sides. The device has an upper mould which acts against a lower mould, the upper face of which lower mould is formed by a distendable, elastic membrane closing the upper end of a liquid filled chamber. Within the chamber, a central member provides resilient support for the center of the membrane. The parts are so arranged that upon closing of the mould portions a layer of pulverulent porcelain composition is gradually shaped and compressed between the upper mould and the membrane into a concave article blank including a foot piece, and where necessary a relief design, which blank is of uniform thickness and density.
REFERENCES:
patent: RE20460 (1937-08-01), Jeffrey
patent: 2962757 (1960-12-01), Slemmons et al.
patent: 3173974 (1965-03-01), Mohr
patent: 3342915 (1967-09-01), Wanderer
patent: 3520961 (1970-07-01), Suda et al.
patent: 3737276 (1973-06-01), Hill et al.
Dorst-Keramikaschinen-Bau Otto Dorst U. Dipl.-Ing. Walter Schleg
Hoag Willard E.
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