US 6,660,206 B1Granted

Method of manufacturing a sealing device

AssigneeNok Corporation

InventorsNoboru Matsushima, Satoshi Yamanaka

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Abstract

A method of manufacturing a sealing device by preparing a mold for molding both a rubber-like elastic material and a resin material, the resin material having a flat washer shape, inserting an outer diameter portion of the resin material into a mold cavity of the mold, and adhesively baking the rubber-like elastic material to the outer diameter portion of the resin material together with the molding of the rubber-like elastic material. An inner diameter portion of the flat washer shape resin material is pressed by a mold part adjacent to the mold cavity in utilization of a mold clamping pressure, the pressed inner diameter portion of the resin material is bent at an elevated temperature by a mold part to form a resin lip, arranged so as to not interfere with the rubber seal lip, and the sealing device produced is separated from the mold.

Claims4

Dependent claims

A method of manufacturing a sealing device, comprising the steps of:

preparing a mold for molding of both a rubber-like elastic material and a resin material, the resin material having a flat washer shape;
inserting an outer diameter portion of the flat washer shape resin material into a mold cavity of said mold, and adhesively baking the rubber-like elastic material to the outer diameter portion of the flat washer shape resin material, together with the molding of the rubber-like elastic material to form a rubber seal lip;
pressing an inner diameter portion of the flat washer shape resin material by a mold part adjacent the mold cavity in utilization of a mold clamping pressure;
bending the pressed inner diameter portion of the flat washer shape resin material, by a mold part of said mold to form a resin seal lip, arranged such that an annular space is formed between a bonded base portion of the rubber seal lip and the resin seal lip so that interference of the resin seal lip with the rubber seal lip is prevented;
and
separating a sealing device from said mold.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/722,403Filed 28 Nov 2000 · division
Priority: JP 5-1602284 Jun 1993
Granted: 9 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B29C 45/14467
Incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles: joining articles or parts of a single article
B29C 45/0055
Combined with a final operation, e.g. shaping: shaping
B29C 45/14221
The inserts being deformed or preformed, e.g. by the injection pressure: by tools, e.g. cutting means
F16J 15/3228
With at least one lip: formed by deforming a flat ring