Patent ID: 8178024

Claim:
An injection molding die for molding a hollow molding article that has, at least, part of externals formed with an insert part having an approximately U-shaped body as a whole, by inserting the insert part into the die, clamping the die, and injecting a molding material into the mold-clamped die, the die comprising: a first mold having a hollow portion and a second mold with a core having a projection extended and fitted into the hollow portion of the first mold, wherein the approximately U-shaped body of the insert part wraps around and is supported by an end part of the projection of the core of the second mold and brought into contact with the hollow portion of the first mold to restrain the core of the second mold from being flapped when the molding material is injected, wherein the molding article is a container body of a front open box type with a laterally long opening capable of accommodating three substrates or less, and wherein the insert part comes into contact with a rear of an opposing wall constituting the hollow portion of the first mold so as to form a rear part of the container body.