Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With coupling between charger and mold
Reexamination Certificate
2008-05-13
2011-11-08
Heitbrink, Timothy (Department: 1744)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With coupling between charger and mold
C425SDIG042, C425SDIG047
Reexamination Certificate
active
08052416
ABSTRACT:
Provided is an injection nozzle and a molding apparatus which ensure injection pressure by suppressing resin leakage even when a resin material having a low viscosity is used. In injection molding, it is especially important that the injection nozzle and a fixed die are excellently kept in contact with each other and that the resin is not leaked. Resin leakage from between the injection nozzle and the fixed die lowers molding pressure, increases molding shrinkage of the resin, and directly affects the qualities of a molded product resulting in generation of a sink, transfer failure and the like. Since an O-ring in a circumferential groove of the nozzle closely comes in contact with a concave spherical surface while elastically transforming on the entire circumference, leakage is effectively suppressed even the resin is a heat-curable resin having a low viscosity.
REFERENCES:
patent: 3354508 (1967-11-01), Draben
patent: 5879727 (1999-03-01), Puri
patent: 6921257 (2005-07-01), Olaru
patent: 7780435 (2010-08-01), Huang
patent: 2004/0037914 (2004-02-01), Takeuchi et al.
patent: 2006-272558 (2006-10-01), None
International Search Report from the Japanese Patent Office mailed Aug. 12, 2008, for International Application No. PCT/JP2008/058771, filed May 13, 2008.
Fujii Yuiti
Hosoe Shigeru
Miyazaki Takemi
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Heitbrink Timothy
Konica Minolta Opto Inc.
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