Method of manufacturing molded resin component, manufacturing apparatus, and molded resin component

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 a 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.

A manufacturing apparatus configured to manufacture a molded resin component, the manufacturing apparatus comprising:

• a first mold in which a flow channel of melted resin is formed and which is configured to form a first surface of a 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,
• wherein a portion of the first mold is disposed between a leading-end surface of the valve pin and the second mold in the predetermined direction, and
• wherein the leading-end surface of the valve pin is located on a side of a cavity formed between the first mold and the second mold.

A molded resin component comprising:

• a first surface on which a convex portion is formed;
• and
• a second surface opposite to the first surface,
• wherein the convex portion includes a molding mark formed by a valve pin of a manufacturing apparatus that manufactured the molded resin component, and
• wherein a shape of at least a portion of a leading-end surface of the valve pin is not transferred into the molding mark.