Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1995-04-12
1998-06-16
Pyon, Harold Y.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
2643288, 2643281, 425145, 425146, 425149, B29C 4577
Patent
active
057665265
ABSTRACT:
An injection molding method and apparatus in which an injection molding metal mold having a valve gate 7 mechanically opening and closing a gate facing an injection molding cavity is used, and the timing of closing the valve gate is set with reference to a melted resin pressure in the injection molding cavity during a holding pressure step in a molding process. The molding method and apparatus result in high accuracy molded products by utilizing a valve gate system in the injection molding of thin products, and also result in molded products having less variations among cavities even in the case where a plurality of products are molded at the same time.
REFERENCES:
patent: 3535742 (1970-10-01), Marcus
patent: 3771935 (1973-11-01), Loichen
patent: 4826641 (1989-05-01), Takeda et al.
patent: 4846651 (1989-07-01), Matsuda et al.
patent: 5030395 (1991-07-01), Kamiguchi et al.
patent: 5062785 (1991-11-01), Stroud, III et al.
patent: 5164202 (1992-11-01), Beyer et al.
patent: 5176859 (1993-01-01), Leffew
patent: 5182716 (1993-01-01), Stroud, III et al.
patent: 5194195 (1993-03-01), Okushima
patent: 5248460 (1993-09-01), Tsutsumi
patent: 5266247 (1993-11-01), Yokota
patent: 5295800 (1994-03-01), Nelson et al.
patent: 5346657 (1994-09-01), Hara et al.
patent: 5375991 (1994-12-01), Rydmann et al.
patent: 5419858 (1995-05-01), Hata et al.
patent: 5447425 (1995-09-01), Hsu et al.
patent: 5500166 (1996-03-01), Sasaki et al.
Fuji Photo Film Co. , Ltd.
Pyon Harold Y.
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