Plain bearings and process for manufacturing same
AssigneeNippon Seiko Kabushiki Kaisha
InventorKyozaburo Furumura
Life of this patent
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Abstract
A plain bearing comprises a metal cylinder as an external member and a resinous cylinder as an internal member, in which the outer surface of the resinous cylinder is firmly engaged and bitten with a concavo-convex portion formed on the inner surface of the metal cylinder. A process for manufacturing the plain bearing comprises producing the metal cylinder, forming the concavo-convex portion on the inner surface of the metal cylinder, combining the concavo-convex portion of the metal cylinder with the resinous cylinder, inserting a core pin into the interior of a combined cylinder of the metal cylinder and the resinous cylinder, squeezing the combined cylinder through a draw die and producing a finished plain bearing.
Claims8
A process for manufacturing a plain bearing, comprising the steps of:
- (a) producing a deformable metallic cylinder having an interior cylindrically-shaped surface;
- (b) forming a concavo-convex portion on said interior cylindrically-shaped surface of said deformable metallic cylinder;
- (c) positioning a resinous cylinder within said deformable metallic surface juxtaposed to said concavo-convex portion formed in said interior cylindrically-shaped surface of said deformable metallic cylinder;
- and
- (d) inserting a core pin into said resinous cylinder and passing said cylinders through a draw die to deform said deformable metallic cylinder about said resinous cylinder to produce said plain bearing.
A process for manufacturing a plain bearing, comprising the steps of:
- (a) producing a deformable metallic cylinder having an interior cylindrically-shaped surface;
- (b) forming a concavo-convex portion on said interior cylindrically-shaped surface of said deformable metallic cylinder;
- (c) inserting said deformable metallic cylinder of step a) into a mold and injecting a fused resin into said mold to form a resinous cylinder about said interior surface of said deformable metallic cylinder;
- and
- (d) inserting a core pin into said resinous cylinder and passing said cylinders through a draw die to deform said deformable metallic cylinder about said resinous cylinder to produce said plain bearing.
A process for manufacturing a plain bearing, comprising the steps of:
- (a) producing a deformable metallic cylinder having an interior cylindrically-shaped surface;
- (b) forming a concavo-convex portion on said interior cylindrically-shaped surface of said deformable metallic cylinder;
- (c) inserting said deformable metallic cylinder into an injection mold with a clearance between an inner surface of said injection mold and outer surface of said deformable metallic cylinder;
- and
- (d) injecting a fused resin into said injection mold under high pressure against said interior cylindrically-shaped surface of said deformable metallic cylinder to deform said deformable metallic cylinder against said inner surface of said injection mold thereby to bind said concavo-convex portion of said interior cylindrically-shaped surface of said deformable metallic cylinder integrally with resinous portions formed by said fused resin to produce a plain bearing.
Dependencies are inferred from the claim text.