US 9,168,688 B2Granted

Injection molding device, injection molding method and housing

AssigneeNEC Personal Computers, Ltd.

InventorKano Toshiaki

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Abstract

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.

Claims5

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/638,655Filed 3 Mar 2011
Priority: JP 2010-07647230 Mar 2010
Published: US 2013/0078403 A128 Mar 2013
Granted: 27 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B29C 45/14008
Incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles: inserting articles into the mould
B29C 45/14221
The inserts being deformed or preformed, e.g. by the injection pressure: by tools, e.g. cutting means
B29C 2045/14188
The inserts being deformed or preformed, e.g. by the injection pressure: trimming the article in the mould
Y10T 428/1397
Polymer or resin containing [i.e., natural or synthetic]: single layer [continuous layer]