Adjustable valve stem apparatus for valve gated injection moldin

Details Adjustable valve stem apparatus for valve gated injection moldin Adjustable valve stem apparatus for valve gated injection moldin

1991-05-17

1992-01-14

Hepperle, Stephen M.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

137315, 251266, B29C 4538

Patent

active

050805754

ABSTRACT:
An adjustable valve stem apparatus 10 adapted for use in an injection molding equipment or device comprises a cylindrical body 12 comprising internally threaded fixed portion 14 and moveable portion 16 threadably mounted on a double-ended screw 30. The fixed and moveable portions 14,16 are relatively oppositely threaded with threads of essentially equal pitch. Moveable portion 16 has a means 26 for removably mounting a valve stem 28 which communicates with a mold cavity. The double-ended screw 30 has a socket 38 formed in its top portion for adjusting the moveable portion 16 relative to the fixed portion 14 thereby corresponding axially displacing the valve stem 28 from a first to second position relative to the workpiece. In a preferred embodiment, the apparatus 10 may be adjusted from the outside of the injection molding equipment, where equipment uptime is critical to the operation.

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patent: 4483512 (1984-11-01), Drapeau
patent: 4588163 (1986-05-01), Christensen
patent: 4801051 (1989-01-01), Lewis et al.

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