Foam-molding parts manufacturing method, foam-molding part, and foam-mold
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Arai, Keiichi Sato, Tomoyasu Shirokawa
Life of this patent
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Abstract
Two partings are provided, a movable core edge face where core back is performed with a mold plate being configured of multiple plates is provided within the thickness of a component edge face, and a driving unit is provided to a pushing-cut shape and a nipping shape. With a molding process, after filling of a foaming resin, the sub parting moves in the core-back direction by predetermined amount, but a punching insert block, a nipping insert block, a slant core, and an outer slider do not move in the core-back direction, and maintain in a position before core back.
Claims18
A foam-molding parts manufacturing method, wherein a said fixed-side mold plate and a movable-side mold plate are closed, thereby forming a cavity within a mold, and a foaming resin is injected into said cavity, and then, the capacity of said cavity is expanded to promote foaming within said cavity, and after cooling, said fixed-side mold plate and said movable-side mold plate are opened to extract a molding part from said cavity;
- wherein expansion of the capacity of said cavity is performed by moving a movable core forming a portion of said cavity relative to said cavity while closing said fixed-side mold plate and said movable-side mold plate.
A foam-molding part which is a box-shaped foam-molding part made up of a top face portion and a side face portion, wherein a weight reduction ratio of said side face portion is smaller as to a weight reduction ratio of said top face portion.
A foam-mold which is a foam-mold configured to inject a foaming resin into a cavity to form a foam-molding part, including a main parting made up of a fixed-side mold plate and a movable-side mold plate, a sub parting made up of a movable-side mold plate and a second movable-side mold plate or a sub parting made up of said fixed-side mold plate and the second fixed-side mold plate, and a movable core forming a portion of said cavity, wherein said movable core moves relative to said cavity in the direction of expanding said cavity while opening said sub parting.
Dependencies are inferred from the claim text.