Method and apparatus for manufacturing metallic parts by fine die casting
AssigneeTakata Corporation
InventorKaname Kono
Life of this patent
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Abstract
An injection molding system includes a feeder in which a metal is melted and a first chamber into which a desired amount of melted metal is introduced. A piston in a second chamber first retracts to create suction, assisting in drawing in the melted metal into the second chamber from the first chamber and evacuating gas. A ram then pushes some melted metal remaining in the first chamber into the second chamber, forcing out gas present in the second chamber. The piston then injects the melted metal out of the second chamber into a mold. The melted metal is preferably maintained in a liquid state throughout the system.
Claims34
An apparatus for injecting melted material into a mold, comprising
- a first chamber which holds melted material,
- a ram that moves through said first chamber to force at least a portion of the melted material from the first chamber through an outlet port leading into a second chamber,
- and a means for drawing in by suction comprising a piston in the second chamber that
- (a) retracts to create suction that assists in drawing into the second chamber at least a portion of the melted material through the outlet port from the first chamber;
- and that
- (b) advances to inject the melted material into a mold.
An apparatus for injecting melted material into a mold, comprising
- a passing means for passing the melted material;
- forcing means for forcing at least a portion of the melted material from the passing means into an accumulation means for accumulating melted material;
- suction means for creating a suction in the accumulation means to draw at least a portion of the melted material from the passing means into the accumulation means;
- injection means for injecting the melted material from the accumulation means into the mold.
Dependencies are inferred from the claim text.