B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
26/161
B23P 15/00 (2006.01)
Patent
CA 1099906
METHOD OF FORMING ELASTOMERIC SEAL WITH A BONDED NON-MOLDABLE INSERT MATERIAL HAVING HYDRODYNAMIC SURFACE AND SEAL HAVING A DUST LIP ABSTRACT OF THE DISCLOSURE A method of forming an elastomeric radial lip seal with a bonded solid, deformable, and non-moldable wear insert having a hydrodynamic surface positioned at the sealing lip through compression molding. Such method embodies the steps of positioning a seal case member coated with a suitable bonding agent on a lower preheated mold core forming a portion of a mold cavity with said core having assembled thereto a negatively imprinted surface having a hydrodynamic fluted configuration at a preselected location; positioning a generally annular deformable and non-moldable solid material treated with a suitable bonding agent on the lower core of the mold situated so as to be in close proximity to the preselected location having the fluted imprinted surface; positioning a generally annular, uncured elastomeric material adjacent the deformable and non-moldable annulus which has a volume greater than the volume of a closed mold cavity; entrapping the elastomer, and deformable and non-moldable annulli and the seal case member by heating and compressing under pressure which is sufficient in magnitude to force portions of the deformable and non-moldable annulus onto the negatively imprint fluted surface by hydrostatic pressure generated by the elastomer being cured, such that a positive imprint is formed on the deformable non-moldable annulus which is generally complementary to the negatively imprinted surface on the seal mold; maintaining pressure and heat for a predetermined period of time to insure curing of the elastomeric annulus and the bonding agents to form a unitary radial lip seal having the deformable and non-moldable annulus bonded to the molded elastomeric annulus material with the latter being bonded to the seal case member; and removing the unitary molded seal member from the mold cavity. An oil seal having a wear insert in the seal lip and optionally including a dust lip is also disclosed.
321854
Federal-Mogul Corporation
Smart & Biggar
LandOfFree
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