procedure for the manufacture of a composite taetning, roerpart fitted with such a taetning and roersamling comprehensive such a complex taetning

摘要

A method is provided for manufacturing by injection molding a composite seal, which is suitable for reception in an internal groove recess of a pipe part, being provided with a coupling and a retaining annular element formed from a less elastic material. Said retaining annular element (1) is provided with one or more sealing parts (2, 3) of a more elastic material. Said method comprises that sealing parts (2, 3) are first formed from a more elastic plastic, being compatible with the less elastic plastic, such that the retaining element (1) is gradually formed and joined to the sealing parts (2, 3), at least one portion of the free surface of the retaining element is provided with a film of the more elastic plastic and the face side of the retaining element has at least one projection (15) of the less elastic plastic in the vicinity of the insertion opening of a pipe part to be received. A pipe part is also provided whereby said pipe part has a coupling having an internal groove recess wherein a composite seal, manufactured according to the present method, is received.