Multi-cylinder type injection molding apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYasumasa Nagasaka, Akira Takasaki
Life of this patent
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Abstract
A multi-cylinder type injection molding apparatus comprises a shifting table that can be moved toward a fixed head supporting a mold and having a plurality of sprues. The apparatus includes a plurality of injection cylinders mounted on the shifting table that can be moved to a direction orthogonal to the moving direction of the shifting table by a ball screw mechanism, a servo motor, and a numerical control to align the nozzle portions of the injection cylinders with the sprues. The apparatus also includes a mechanism for injecting molten molding material from the injection cylinders into the sprues. In one embodiment of the apparatus, the injecting conditions of each injection cylinder is controlled independently.
Claims16
A multi-cylinder type injection molding apparatus, compirising:
- a base frame;
- a fixed head mounted on said base frame for supporting a molding apparatus having a plurality of sprues, said sprues being in flow communication with a cavity in a mold;
- a shifting table movably mounted on said base frame and movable toward and away from said fixed head;
- means for moving said shifting table toward and away from said fixed head;
- a plurality of longitudinally positioned and laterally aligned injection cylinders mounted on said shifting table and movable therewith, each of said injection cylinders having a first end including a nozzle portion and means for supplying a molten molding material to said nozzle portion, said injection cylinders being movable relative to said shifting table in a positioning direction orthogonal to the direction of movement of said shifting table;
- and
- positioning means for moving said injection cylinders in said positioning direction to align each of said injection cylinders with an individual one of said sprues, said nozzle portions of said aligned injection cylinders contacting said sprues when said shifting table is moved toward said fixed head.
Dependencies are inferred from the claim text.