Method and a mould for forming an expansion, such as a socket, i

Details Method and a mould for forming an expansion, such as a socket, i Method and a mould for forming an expansion, such as a socket, i

1994-09-08

1997-02-11

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

425503, B29C 4920

Patent

active

056017766

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.

REFERENCES:
patent: 3540759 (1970-11-01), Schneider
patent: 3982871 (1976-09-01), Moddel
patent: 4030872 (1977-06-01), Parmann
patent: 4394343 (1983-07-01), Acda et al.

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