Polymer bearing cage with amorphous case

Details Polymer bearing cage with amorphous case Polymer bearing cage with amorphous case

1991-04-08

1992-04-14

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

384576, 384909, F16C 3356

Patent

active

051042410

ABSTRACT:
A plastic part is molded of a plastic with an inner body of crystalline plastic and an outer surface layer of an amorphous plastic. The amorphous surface layer withstands friction loading at least during an initial break-in period. In one embodiment, the amorphous surface is formed by using a higher plastic melt temperature and/or a lower mold temperature than normal. In another embodiment, an intermediate part is molded as a crystalline intermediate part, and a surface layer is heated and quenched to form the amorphous surface layer on the final part. A bearing cage is molded by injecting the plastic melt at a single point intermediate the ends of a single bar of the bearing cage to permit formation of the desired amorphous layer on rails connected to the ends of the bars.

REFERENCES:
patent: 3028204 (1958-10-01), Schaeffler
patent: 3388952 (1968-06-01), Schaeffler
patent: 3733111 (1973-05-01), Harlan et al.
patent: 3820864 (1974-06-01), Petre
patent: 3881790 (1975-05-01), Ryanen
patent: 4339374 (1982-07-01), Olschewski et al.
patent: 4744679 (1988-05-01), Verburg et al.
patent: 4934841 (1990-06-01), De Vito
patent: 4977164 (1989-10-01), Schack
patent: 4997295 (1991-05-01), Saitou

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