Process for in situ molding of a bearing material in a ball and

Details Process for in situ molding of a bearing material in a ball and Process for in situ molding of a bearing material in a ball and

1996-03-25

1997-12-30

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

B29C 4514

Patent

active

057026602

ABSTRACT:
A process is provided for injection molding a plastic material into an interfacial space between a spherical ball and a spherical cavity of a ball and socket joint assembly to form a plastic bearing which has an as-molded tapered undercut. A sacrificial ring having a preselected outer diameter and a generally triangular cross-sectional shape is selected. The sacrificial ring is placed around the ball adjacent the neck of the ball assembly. The sacrificial ring is rigidly confined between the ball, the cavity, and the mold. The plastic material is injection molded into the interfacial space and a plastic bearing having a tapered undercut which mimics the shape of the sacrificial ring is formed.

REFERENCES:
patent: 3218376 (1965-11-01), Schindler et al.
patent: 3629921 (1971-12-01), Davies et al.
patent: 3734660 (1973-05-01), Davies et al.
patent: 4290181 (1981-09-01), Jackson

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