Compression molding apparatus

Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds

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Details

425117, 4251261, 425127, 425233, 425236, 425577, 425588, 425261, 425361, 425437, B29C 3910, B29C 4514

Patent

active

050355945

ABSTRACT:
A compression molding apparatus for forming a plastic grip ring and simultaneously linking it integrally to a linking protruding piece of a container closure body. The apparatus includes a mold composed of a first mold portion and a second mold portion adapted to be opened or closed by being moved relative to each other in a predetermined direction. The first mold portion has an accommodating space for receiving the closure body and a first mold cavity extending in a ring-like shape. At least the free end portion of the linking protruding piece of the closure body to be received in the accommodating space is projected into the first mold cavity. The second mold portion has a main part consisting of a second mold cavity extending in a ring-like shape and a conduit hole extending in said predetermining direction from the second mold cavity and a compression rod to be slidably inserted into the conduit hole. A plastic material fed into the conduit hole is compressed by the compression rod and molded into the grip ring having a shape corresponding to a molding space defined by the cooperation of the first and second mold cavities.

REFERENCES:
patent: 695507 (1902-03-01), Strang
patent: 4312687 (1982-01-01), Sigworth
patent: 4424015 (1984-01-01), Black et al.

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