Injection mold and method for manufacturing injection molded articles
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsYasuhisa Osawa, Makoto Sato
Life of this patent
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Abstract
In an injection mold comprising a cavity and a gate for feeding a molding material into the cavity, the molding material fed from the gate into the cavity is divided into two streams that flow through the cavity and then meet at a confluent point so that the molding material portions are joined together along a joint plane. Two air vent gates are spaced apart from the confluent point so as to provide a larger area of the joint plane. Articles having a good outer appearance and improved strength at the material joint can be consistently manufactured to a high precision.
Claims8
An injection mold comprising a cavity, an inlet gate for feeding a molding material into the cavity therethrough, and at least two air vent gates in fluid communication with the cavity wherein the molding material fed from the inlet gate into the cavity is divided into at least two streams that flow through the cavity and then meet at a confluent point so that the molding material portions are joined together along a joint plane, and
- the joint plane connecting the air vent gates are spaced apart from the confluent point such that the area of the joint plane may become larger than the area of the joint plane given by the molding material portions when the air vent gates are disposed at the confluent point.
Dependencies are inferred from the claim text.