Mold structure and method for manufacturing molded product
A mold structure includes a fixed mold and a movable mold, and a first insert and a second insert disposed in the movable mold. A molded product includes a plate-shaped body, a side wall, and a wrapped portion. The side wall has a basal end region that is curved and connected to the body. The first insert is located at a position corresponding to the side wall inside the molded product. The second insert is located at a position corresponding to the body inside the molded product. The second insert has a contact surface for the molded product. When the mold structure is clamped, an edge of the contact surface is located closer to a distal end of the side wall than a position where the basal end region of the side wall is connected to the body.
1 . A mold structure used for manufacturing a resin molded product, the molded product including a plate-shaped body, a side wall, and a wrapped portion, the side wall protruding from an outer edge of the body toward one side in a thickness direction of the body, the side wall having a basal end region that is curved and connected to the body, and the wrapped portion protruding inward of the side wall from a distal end of the side wall, the mold structure comprising:
a fixed mold and a movable mold; and
a first insert and a second insert disposed in the movable mold, wherein
the mold structure is configured to define a space into which molten resin can be injected between the fixed mold and the movable mold when the mold structure is clamped,
the mold structure is configured such that when the resin solidifies between the fixed mold and the movable mold, the first insert is located at a position corresponding to the side wall inside the molded product, and the second insert is located at a position corresponding to the body inside the molded product,
the first insert is configured to be pulled out of the molded product by separating from the second insert when the mold structure is opened, while the second insert remains in contact with the molded product,
the second insert has a contact surface for the molded product, the contact surface having, as viewed in a cross section, a straight portion and a curved portion, and
when the mold structure is clamped, an edge of the contact surface is located below the straight portion and closer to the distal end of the side wall than a position where the basal end region of the side wall is connected to the body.
2 . The mold structure according to claim 1 , wherein
the wrapped portion has an inner end opposite to an end connected to the side wall, and
when the mold structure is clamped, the edge of the contact surface is located closer to the distal end of the side wall than the inner end of the wrapped portion in a direction that is orthogonal to the thickness direction.
3 . The mold structure according to claim 1 , wherein
the second insert has a side surface in contact with the first insert, and
the side surface is an inclined surface connected to the contact surface, and inclined with respect to the thickness direction such that the side surface approaches the side wall as proximity to the contact surface increases.
4 . The mold structure according to claim 1 , wherein
a portion of the contact surface corresponding to the basal end region of the side wall is a curved surface that is curved so as to be in planar contact with the basal end region.
5 . A method for manufacturing a resin molded product, the molded product including a plate-shaped body, a side wall, and a wrapped portion, the side wall protruding from an outer edge of the body toward one side in a thickness direction of the body, the side wall having a basal end region that is curved and connected to the body, and the wrapped portion protruding inward of the side wall from a distal end of the side wall, the method comprising:
a step of preparing a mold structure that includes a movable mold and a fixed mold, wherein a first insert and a second insert are disposed in the movable mold;
a step of injecting molten resin between the movable mold and the fixed mold when the mold structure is clamped, wherein, when the resin solidifies between the fixed mold and the movable mold, the first insert is located at a position corresponding to the side wall inside the molded product, and the second insert is located at a position corresponding to the body inside the molded product;
a step of pulling the first insert out of the molded product by separating the second insert and the first insert from each other when opening the mold structure; and
a step of removing the molded product from the second insert with the first insert pulled out of the molded product, wherein
the second insert has a contact surface for the molded product, the contact surface having, as viewed in a cross section, a straight portion and a curved portion, and
when the mold structure is clamped, an edge of the contact surface is located below the straight portion and closer to the distal end of the side wall than a position where the basal end region of the side wall is connected to the body.