Production process of porous retainer for rolling bearing
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Sep 30, 1997
filing date -
Oct 1, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for the production of a porous retainer for use in a rolling bearing for holding rolling elements. The process comprises the following steps: (1) blending a polyimide resin, which serves as a porous matrix material for the porous retainer, with another heat-resistant resin which has a forming temperature range close to the polyimide resin and, when treated with a solvent in the presence of the polyimide resin, is solely dissolved out; (2) forming the resulting resin blend into a retainer of a desired shape; and (3) treating the thus-formed retainer with the solvent, whereby the another heat-resistant resin is solely dissolved out.
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