Injection molding apparatus, resin molded article, and manufacturing method therefor
AssigneesHonda Motor Co., Ltd., Sakaiya Co., Ltd.
InventorsSeonghun Lee, Takuro Ojima, Masaru Sugino
Life of this patent
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Abstract
An injection molding apparatus is equipped with a first mold and a second mold. The first mold or the second mold includes sliding members that are inserted into holes formed in a workpiece. The sliding members are capable of being displaced in a direction to approach toward or separate away from a cavity formed by the first mold and the second mold.
Claims7
An injection molding apparatus that molds a resin on at least a peripheral edge portion of a workpiece in which an opening is formed, the injection molding apparatus comprising:
- a first mold in which injection members configured to inject a molten resin are provided;
- and
- a second mold configured to form a cavity together with the first mold,
- wherein the first mold or the second mold includes a retaining section configured to retain the workpiece, and a sliding member inserted into a hole formed in a vicinity of the opening, and
- the sliding member is configured to be displaced in a direction to approach toward or separate away from the hole.
A resin molded article comprising:
- a main body;
- and
- a resin covering layer molded on at least a peripheral edge portion of the main body,
- wherein an annular groove is formed in the main body, and a step portion protruding relatively to the annular groove is provided inside the annular groove, and
- a bottomed hole is formed in the stepped portion.
A method of manufacturing a resin molded article by molding a resin on at least a peripheral edge portion of a workpiece in which an opening is formed and which is accommodated in a cavity formed by a first mold and a second mold constituting an injection molding apparatus, the method comprising the steps of:
- retaining the workpiece in a retaining section provided in the first mold or the second mold, and inserting a sliding member into a hole formed in a vicinity of the opening;
- injecting a molten resin from injection members provided in the first mold or the second mold, and displacing the sliding member in a direction to approach toward or separate away from the hole;
- and
- allowing the injected molten resin to harden.
Dependencies are inferred from the claim text.