Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent
1975-01-13
1976-10-26
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Female mold type means
425DIG47, B29H 3042, B29H 306, B29C 100
Patent
active
039880915
ABSTRACT:
An apparatus for manufacturing fluid seals, which includes first and second mold parts movable along a given axis between open and closed positions. One mold part has a radially extending mold surface adapted to receive and support one surface of the flange portion of an insert to which a molded part of the seal is to be bonded, and the other mold part has a portion adapted to engage an opposite surface of the flange to hold the flange against the receiving and supporting mold surface to prevent leakage of fluid material from said cavity along the flange. One mold part includes at least one upper frusto-conical surface adapted to form one surface of the primary lip of the seal, a second seal body-forming surface of generally cylindrical form lying beneath the upper surface and joined thereto by a smooth transition portion, a lower frusto-conical surface tapering inwardly and downwardly and defining one surface of a second seal lip spaced axially from the primary lip, and an insert centering ring spaced downwardly apart from said cylindrical surface. The centering ring has a rounded nose portion of slightly greater diameter than the diameter of the cylindrical surface, and a wall surface extending downwardly and outwardly from the nose portion. The largest diameter of the centering ring is just smaller than the inside diameter of the flange of said insert. In use, when the insert is allowed to fall freely into said mold, it is centered by successive contact between its inside diameter and said first tapered surface, said cylindrical surface, and said centering ring wall surface.
REFERENCES:
patent: 3004298 (1961-10-01), Haynie
patent: 3241193 (1966-03-01), Pohlman
Charvat Robert J.
Chicago Rawhide Manufacturing Company
Fitzgibbon James T.
Husar Francis S.
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