Sealing bellows, method for the production thereof and sealing bellows arrangement

Patent metadata

Field	Value
Publication number	US-9956733-B2
Application number	US-201414571373-A
Country	US
Kind code	B2
Filing date	Dec 16, 2014
Priority date	Sep 20, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A method for producing a sealing bellows, involving (1) vulcanizing a sealing bellows having clamping elements integrated into the sealing region and into the attachment region ( 2 ) and having a substantially cylindrical casing, thereby forming the sealing bellow; (2) interrupting the vulcanizing after the mold cavity has been filled and after attaining dimensional stability of the sealing bellows and then releasing the sealing bellows from the mold; (3) introducing the sealing bellows having a substantially cylindrical casing into a heated blowing mold having a substantially spherical cavity and sealing the blowing mold in an airtight manner; (4) subjecting the interior of the sealing bellows to a relative excess pressure such that the casing is applied against a wall delimiting the cavity of the blowing mold; and (5) completely curing the sealing bellows, then opening the blowing mold to release the sealing bellows from the mold.

First claim

The invention claimed is:

1. A method of producing a sealing bellows, the method comprising:
producing, using vulcanization, the sealing bellows including a sealing region, an attachment region, and a substantially cylindrical casing that is disposed, in an axial direction of the bellows, between the sealing region and the attachment region, the sealing region being formed with an integrated first clamping element, and the attachment region being formed with an integrated second clamping element;
interrupting the vulcanization after a mold cavity for the sealing bellows has been filled and after dimensional stability of the sealing bellows has been attained, and releasing the sealing bellows from the mold cavity;
introducing the sealing bellows with the substantially cylindrical casing into a heated blowing mold having a substantially spherical cavity, the blowing mold being sealed in an airtight manner;
subjecting an interior of the sealing bellows with the substantially cylindrical casing to a relative excess pressure such that the casing is applied against a wall delimiting the cavity of the blowing mold and thereby forms a substantially spherical casing;
completing the vulcanization of the sealing bellows; and then
opening the blowing mold and releasing the sealing bellows having the substantially spherical casing from the blowing mold.

2. The method of claim 1 , wherein the sealing bellows with the substantially cylindrical casing is formed by an injection molding process, and wherein the vulcanization takes place in the mold cavity after the injection molding process.

3. The method of claim 1 , wherein the subjecting of the interior of the sealing bellows is performed using compressed air.

Assignees

• Freudenberg Carl Kg

Inventors

• Idies Nedal

Classifications

• F16C11/0666

  Sealing means between the socket and the inner member shaft · CPC title

• Y10T403/315

  Cross-Sectional Technologies · mapped topic

• B29C2049/563

  Clamping means · CPC title

• B29C49/56

  Opening, closing or clamping means · CPC title

• F16J3/042 Primary

  Fastening details · CPC title