Method of manufacturing a sealing device

Details Method of manufacturing a sealing device Method of manufacturing a sealing device

1993-01-06

1997-01-21

Davis, Robert B.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

264138, 264159, 264266, 264268, 277152, 425DIG47, D29C 4318, F16J 1532

Patent

active

055956971

ABSTRACT:
A sealing device to be mounted between a member and a rotation shaft which can be rotated relatively to the member, includes an annular flanged portion formed of a resin and disposed to surround the rotation shaft, and extends in a radial direction of the rotation shaft. A resin seal lip extends from an inner end of the flanged portion in an axial direction of the rotation shaft toward fluid to be sealed in such a manner that the resin seal lip surrounds the rotation shaft. The resin seal lip has a first seal ring having a sealing surface which hermetically and slidably contacts the rotation shaft, a second seal ring having an elastic flanged portion formed of a rubber material and disposed to surround the rotation shaft and extending in a radial direction of the rotation shaft, and an elastic seal lip extending, over the resin seal lip, from an inner end of the elastic flanged portion in the axial direction of the rotation shaft toward the fluid to be sealed to surround the resin seal lip. The elastic seal lip incorporates a lip leading portion having a sealing surface which slidably and hermetically contacts the rotation shaft. The flanged portion and the elastic flanged portion are bonded and secured to each other while interposing at least one continuous bonded portion to continuously surround at least the rotation shaft, and the continuous bonded portion seals the joining surface between the flanged portion and the elastic flanged portion.

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