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US 4,902,212 AGranted
Self-lubricating metallic matrix for injection molding
AssigneeSankyo Engineering Co., Ltd.
InventorsSusumu Nakamura, Koichi Yokoi
Life of this patent
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Abstract
A self-lubricating metallic matrix for injection molding, the matrix having an element having a lubrication requiring sliding wall in which a plurality of receiving holes are formed in such a positional relationship that end faces thereof may be positioned in a partially overlapping relationship with each other in the direction of such sliding movement, and a solid lubricant received in the receiving holes of the element.
Claims5
A self-lubricating metallic matrix for injection molding, comprising:
- a core side metallic matrix element;
- a cavity side metallic matrix element, said core and cavity side metallic matrix elements being movable toward and away from each other for closing and opening a mold cavity;
- means for injecting a molten material into the closed mold cavity to form a molded article in the mold cavity, the molded article being removable when the matrix elements are moved to open the cavity;
- at least one of said core and cavity side metallic matrix elements having a plurality of lubrication requiring surfaces which slide with respect to each other in a slide direction, during opening and closing of the cavity, each of said surfaces having a plurality of receiving holes distributed in a positional relationship so that said holes at least partially overlap each other during movement in the slide direction;
- and
- a solid lubricant received in each of said receiving holes for lubricating said lubrication requiring surfaces, and solid lubricant selected from the group consisting of graphite, molybdenum disulfide, paraffin, and tetrafluoridecontaining resin.
3 more elements
Dependencies are inferred from the claim text.