Adjustable valve stem apparatus for valve gated injection molding devices

摘要

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 correspondingly 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.