Injection molding machine
AssigneeSumitomo Heavy Industries, Ltd.
InventorShunshi Kuzumi
Life of this patent
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Abstract
An object is to charge resin into cavities in accordance with molding conditions individually set for the cavities by controlling valve gates disposed within a mold apparatus or a mold support apparatus by use of a controller, to produce individual molded products under optimal molding conditions, to produce molded products having no variation in molding accuracy and quality, and to lower the cost of the mold apparatus. For such a purpose, an injection molding machine includes a plurality of cavities formed in a mold apparatus; resin,passages for charging resin into the cavities; a plurality of selection means respectively disposed in the resin passages corresponding to the cavities and adapted to selectively open and close the corresponding resin passages; and a controller for controlling the selection means.
Claims23
An injection molding machine characterized by comprising:
- (a) a plurality of cavities formed in a mold apparatus;
- (b) resin passages for charging resin into the cavities;
- (c) a plurality of valves respectively disposed in the resin passages corresponding to the cavities and adapted to selectively open and close the corresponding resin passages;
- and
- (d) a controller for controlling the valves.
An injection molding method for:
- (a) producing a first molded product in a first cavity formed between a stationary mold and an intermediate mold and producing a second molded product, which differs in shape from the first molded product, in a second cavity formed between the intermediate mold and a movable mold, the method being characterized by comprising:
- (b) charging resin into one cavity at a first timing via a resin passage in the intermediate mold;
- (c) controlling the resin passage by means of valves provided within the intermediate mold so as to establish communication between the resin passage and the other cavity;
- and
- (d) charging the resin into the other cavity at a second timing via the resin passage in the intermediate mold.
An injection molding method for:
- (a) producing a first molded product by use of a first mold apparatus disposed between a first movable-mold support apparatus and a second movable-mold support apparatus, and producing a second molded product by use of a second mold apparatus disposed between the second movable-mold support apparatus and a stationary-mold support apparatus, the method being characterized by comprising:
- (b) charging resin at a first timing into a first cavity formed in the first mold apparatus via a resin passage in the second movable-mold support apparatus;
- and
- (c) charging resin at a second timing into a second cavity formed in the second mold apparatus via the resin passage in the second movable-mold support apparatus.
Dependencies are inferred from the claim text.