Plastic U-shaped return conduit and apparatus and method for mol

Details Plastic U-shaped return conduit and apparatus and method for mol Plastic U-shaped return conduit and apparatus and method for mol

1974-12-11

1976-01-06

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

264328, 425242R, 425438, 425444, 425468, B29C 114, B29C 700

Patent

active

039307778

ABSTRACT:
A molded plastic J-shaped trap or conduit has a U-portion with a laterally curved or slightly helical configuration to provide for automatically producing the conduit within a multiple cavity injection mold. The mold includes a set of mold sections which define a U-shaped cavity having a slight helical configuration, and a slight helical U-shaped core member is supported within the cavity by a core support rod and a set of core slides which engage opposite ends of the core member. The core member and one of the core slides are adapted to be elevated after the mold sections are opened to remove a molded conduit from the cavity, and the core member remains supported by the core support rod which extends through the one core slide. The molded conduit is stripped from the core member by an annular stripping plate which is moved by an actuator along the core member in a helical path, and the conduit is directed past the core support rod as the conduit is being stripped.

REFERENCES:
patent: 3028630 (1962-04-01), Walker
patent: 3222727 (1965-12-01), Ford et al.
patent: 3711590 (1973-01-01), Deutsch
patent: 3746493 (1973-07-01), Stalter
patent: 3849053 (1974-11-01), Bruce et al.

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