Resin part and its manufacturing method
AssigneeDenso Corporation
InventorsYohei Yoshimura, Takeshi Kusano, Kentaro Fukuda, Mitsuhiro Suzuki
Life of this patent
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Abstract
A resin part includes a plate-shaped molded main body that is constituted of an injection-molded product. Of plate surfaces of the molded main body, a surface on an opposite side to a surface requiring surface accuracy constitutes a pressure-application surface to which pressure is applied by a movable insert. A parting line is formed on the pressure-application surface by the movable insert to satisfy the following relationship: (t/4)≤x≤(3t/2), where x is a distance from an end edge part of the molded main body to the parting line and t is a thickness of the molded main body.
Claims6
A resin part comprising a plate-shaped molded main body that is constituted of an injection-molded product, wherein
- of plate surfaces of the molded main body, a surface on an opposite side to a surface requiring surface accuracy constitutes a pressure-application surface to which pressure is applied by a movable insert, and
- a parting line is formed on the pressure-application surface by the movable insert to satisfy the following relationship:
- (t/4)≤x≤(3t/2),
- where x is a distance from an end edge part of the molded main body to the parting line and t is a thickness of the molded main body.
A method of manufacturing a resin part, the resin part comprising a plate-shaped molded main body that is constituted of an injection-molded product,
- the method comprising an injection molding step in which the molded main body is injection-molded by a molding apparatus,
- the molding apparatus comprising a movable insert for applying pressure in a metal mold that forms a cavity corresponding to the molded main body,
- wherein
- in the injection molding step, an operation of moving the movable insert to apply pressure to a pressure-application surface of the molded main body is performed, and
- the movable insert is provided so as to satisfy the following relationship:
- (t/4)≤x≤(3t/2),
- where x is a distance from an end edge part of the molded main body to a parting line formed on the pressure-application surface of the molded main body by the movable insert, and t is a thickness of the molded main body.
Dependencies are inferred from the claim text.