Plastic article or earthenware shaping or treating: apparatus – Female mold including tamping means or means utilizing mold... – Including means imparting diverse motion
Patent
1975-12-04
1977-09-27
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Female mold including tamping means or means utilizing mold...
Including means imparting diverse motion
425435, 264310, B29C 504
Patent
active
040508757
ABSTRACT:
A device and method for use in the art or craft of molding hollow artistic objects from thermoplastic molding material, such as wax. The molding device includes a frame with a vertical stationary, circular gear rack secured thereto. A crank driven shaft is journaled through the frame in a position concentric with the rack. A yoke-like mold carrier is secured to the end of the shaft for rotation therewith. A mold holder is, in turn, mounted on the mold carrier for rotation about an axis generally perpendicular to the crank shaft axis between the yoke arms of the mold carrier. The mold holder has a shaft projecting through one of the yoke arms of the mold carrier and is secured to and driven with a disc gear, which is enmeshed with the gear rack. As the crank is turned to rotate the mold carrier, the disc gear rides on the gear rack and rotates the mold holder. In operation, a mold in the form of a pair of mating mold halves providing a mold cavity is supplied with molten thermoplastic material, assembled, and mounted on the mold holder. Turning of the crank causes the mold to be rotated on the two generally perpendicular axes and generally evenly distributes the thermoplastic material on the interior of the mold cavity surface as it cools and sets.
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Katzman Allison W.
Keller Albert G.
Marvin Glass & Associates
Spicer, Jr. Robert L.
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