Static molds – Container-type molding device – Including means securing molding device to detachable,...
Patent
1975-01-20
1976-09-28
Husar, Francis S.
Static molds
Container-type molding device
Including means securing molding device to detachable,...
249127, 264313, 425440, 425DIG44, B29C 116, B29C 112, B28B 706
Patent
active
039827216
ABSTRACT:
Molding apparatus for molding articles without a seam or parting line even though articles may have severe backdraft portions. The apparatus includes a one-piece flexible mold which is deformable by the application of a fluid pressure differential to thereby release the finished article from the mold. The mold has a self-supporting, radially extending annular flange which forms a seal with a vacuum pot when the mold is set in the pot and the flange has a downwardly extending annular projection or lip which fits freely over the outside diameter of the side wall of the pot. The downwardly extending projection is of sufficient inside diameter to allow the flange to be easily set upon or removed from the vacuum pot and the flange also has sufficiently close tolerances with respect to the outside diameter of the pot as to accurately align and center the mold in the pot. One embodiment of the invention also has a restraining ring member imbedded in the flange, thereby providing means to maintain the shape of the periphery of the flange to prevent it from being completely drawn into the mold when vacuum is applied.
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patent: R19409 (1935-01-01), Berkeley
Maurino William J.
Putzer Raymond M.
Brown John S.
Husar Francis S.
Nilles James E.
Precision Flexmold, Inc.
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