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US 10,647,038 B2Granted
Injection mold, mold component, method for manufacturing molded article, and method for manufacturing dome-type cover
AssigneeCanon Kabushiki Kaisha
InventorShusuke Tobita
Life of this patent
Estimating the term…
Abstract
An injection mold includes a cavity formed by a plurality of members including at least a convex surface member and a concave surface member, and a gate formed by a plurality of members including at least a flash formation preventing member. One of the members forming the gate is disposed so as to be adjacent to one of the members forming the cavity, and is pressed against the adjacent member forming the cavity by a pressure of injected resin.
Claims7
An injection mold comprising:
- a cavity formed by a plurality of members including at least a convex surface member and a concave surface member;
- and
- a gate formed by a plurality of members including at least a flash formation preventing member,
- wherein the flash formation preventing member is disposed so as to be adjacent to the convex surface member,
- wherein the flash formation preventing member comprises a resin channel formed by a groove portion and a resin receiving portion having a surface formed in a direction intersecting with a longitudinal direction of the groove portion, and the longitudinal direction of the groove portion is a flow direction of resin in the resin channel and is the same as a resin injection direction of the gate,
- wherein the flash formation preventing member has a bridge portion configured to bend so as to allow the flash formation preventing member to be deformable in the longitudinal direction of the groove portion toward the convex surface member, and
- wherein when resin pressure acts on the resin receiving portion, the flash formation preventing member is deformed in the longitudinal direction and is pressed against a cavity side surface of the convex surface member adjacent thereto by a pressure of injected resin.
4 more elements
A method for manufacturing a molded article, the method comprising:
- injecting resin into a gate formed by a plurality of members, including at least a flash formation preventing member, and a cavity formed by a plurality of members, including at least a convex surface member and a concave surface member,
- wherein the flash formation preventing member is disposed so as to be adjacent to the convex surface member,
- wherein the flash formation preventing member comprises a resin channel formed by a groove portion and a resin receiving portion having a surface formed in a direction intersecting with a longitudinal direction of the groove portion, and the longitudinal direction of the groove portion is a flow direction of resin in the resin channel and is the same as a resin injection direction of the gate,
- wherein the flash formation preventing member has a bridge portion configured to bend so as to allow the flash formation preventing member to be deformable in the longitudinal direction of the groove portion toward the convex surface member, and
- wherein when resin pressure acts on the resin receiving portion, the flash formation preventing member is deformed in the longitudinal direction and is pressed against a cavity side surface of the convex surface member adjacent thereto by a pressure of injected resin.
2 more elements
Dependencies are inferred from the claim text.