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...
Reexamination Certificate
2007-02-06
2007-02-06
Heitbrink, Tim (Department: 1722)
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...
C425S566000
Reexamination Certificate
active
10874961
ABSTRACT:
A valve pin adjustment system is provided for use in valve gated injection molding applications which enables adjustments to the positioning of the valve pin without necessitating removal of the clamping plates and valve assembly components, including valve pins. A piston associated with the valve pin includes a cylindrical body having first and second co-axially aligned internally threaded bores of respective first and second diameters. Preferably, the threads formed in the first and second bores are of the opposite hand. First and second externally-threaded cylindrical valve pin positioning members are respectively received in the first and second bores. Each of the positioning members includes a head portion and a tip portion. The tip of the second positioning member is in contact with the head of the first positioning member to lock the first positioning member in place, and the tip of the first positioning member is in contact with a head portion on the valve pin to locate the valve pin.
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Drawings from 1996 Thermoplay SPA catalog showing Type D3 022 X “L” Valve Gate Assembly and Shut Off Valve for 022 Nozzle.
Drawings from Jan. 1997 Husky Catalog for VG 750: manifold pocket detail (2B5.1.1); plate sizing pocket detail (2B5.2.1) and unlabeled drawing (2B5.OV).
Drawings from Jul. 1995 Mold-Masters catalog for: DC Pneumatic Valve Gate (5.03.19); DC Hydraulic Valve Gate (5.03.18); and DC Hydraulic Valve Gate without Cylinder (5.03.17).
Drawings from Aug. 1989 Dynisco Hotrunners catalog, for SR-20 VG Hot Runner Nozzle (p. 51); Hydraulic Modular Valve Gate Actuator (p. 49); and SR-20VG Installation Details and Heater Options (p. 53).
Steve Johnson, Troubleshooting Defects: Part II, Sep. 2004, Moldmaking Technology.
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