A method and a mould for forming an expansion, such as a...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 47/06 (2006.01) B29C 33/48 (2006.01) B29C 43/36 (2006.01) B29C 57/02 (2006.01) F16L 21/02 (2006.01)

Patent

CA 2131928

Abstract The present invention relates to a method and a mould for forming an expansion, such as a socket, in a plastic pipe, and a plastic pipe. According to the method, the heated end of the pipe is placed in an external mould (2) and pressed against the mould surface (6) to form a socket. Two grooves (8, 9) can be formed in the socket by a simple method, using a mould ring (12) which is separate from the other parts (3, 4) of the mould and by means of which the grooves of the socket are formed. The ring is simultaneously locked into the socket (7), thereby functioning as a reinforcement ring.

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