Method of manufacturing molded resin component, manufacturing apparatus, and molded resin component
AssigneeCanon Kabushiki Kaisha
InventorYuta Moriya
Life of this patent
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Abstract
A molded resin component includes a first surface on which a convex portion is formed, and a second surface opposite to the first surface. The convex portion includes a molding mark formed by a valve pin of a manufacturing apparatus that manufactured the molded resin component. A shape of at least a portion of a leading-end surface of the valve pin is not transferred into the molding mark.
Claims9
A method of manufacturing a molded resin component by using a manufacturing apparatus, the manufacturing apparatus including:
- a first mold in which a flow channel of melted resin is formed and which is configured to form a first surface of the molded resin component;
- a second mold configured to form a second surface of the molded resin component opposite to the first surface;
- and
- a valve pin configured to move forward and backward in a predetermined direction and open and close the flow channel,
- the method comprising:
- injecting the melted resin from the flow channel into a cavity formed between the first mold and the second mold in such a manner that a portion of the first mold is located between a leading-end surface of the valve pin and the second mold in the predetermined direction;
- and
- separating the leading-end surface of the valve pin from the portion of the first mold when the flow channel is opened in such a manner that the portion of the first mold is positioned on an extension line of a central axis of the valve pin.
A method of manufacturing a molded resin component by using a manufacturing apparatus, the manufacturing apparatus including:
- a first mold in which a flow channel of melted resin is formed and which is configured to form a first surface of the molded resin component;
- and
- a second mold configured to form a second surface of the molded resin component opposite to the first surface,
- the method comprising:
- keeping a temperature of an area of a molding surface of the second mold below a glass transition point of a material of the molded resin component when the melted resin is injected from the flow channel into a cavity formed between the first mold and the second mold,
- wherein the area faces the flow channel.
Dependencies are inferred from the claim text.