Injection molding device, injection molding method and housing

摘要

There is provided an injection molding device in which the film cutoff and the injection molding can be conducted in one process without fine positional adjustment of the stopper and the shape of the edge surface of the member is not limited to the shape of the cutting blade.;Resin is injected between a film (8) arranged on a cavity (1) as a metallic mold including a depression-shaped portion and a core (2) as a metallic mold including a projection-shaped portion to be inserted in the depression-shaped portion of the cavity (1), to thereby form a member; the cavity (1) includes a cutting blade (7) in an outer edge of the depression-shaped portion to cut off the film (8) arranged to project toward an outside plane of the depression-shaped portion; the core (2) includes an edge (3) in an outer edge of the projection-shaped portion to form an edge surface of the member; and when the core (2) is inserted in the cavity (1), the film (8) nipped by the cutting blade (7) and the edge (3) is cut off.

主权项

1. An injection molding device which injects resin between a film arranged on a cavity as a metallic mold including a depression-shaped portion and a core as a metallic mold including a projection-shaped portion to be inserted in the depression-shaped portion of the cavity, to thereby form a member, characterized in that:
the cavity includes a cutting blade in an outer edge of the depression-shaped portion to cut off the film wherein the cutting blade includes a projection-shaped portion that projects toward an outside plane of the depression-shaped portion; the core includes an edge in an outer edge of the projection-shaped portion to form an edge surface of the member, and a film holder which is in sliding contact with a surface of the projection-shaped portion and disposed outside the projection-shaped portion to face the outside plane of the depression-shaped portion of the cavity and which is energized to push the cavity when the core is inserted in the cavity, wherein the film holder includes a depression-shaped portion having a shape corresponding to the projection-shaped portion of the cutting blade; and when the core is inserted in the cavity, the film held between the projection-shaped portion of the cutting blade and the depression-shaped portion of the film holder, the film nipped by the cutting blade and the edge is cut off.