Method of bonding plastic pipes

Details Method of bonding plastic pipes Method of bonding plastic pipes

B - Operations, Transporting

29

C

18/975

B29C 65/18 (2006.01) B29C 65/02 (2006.01) B29C 65/20 (2006.01) F16L 47/02 (2006.01)

Patent

CA 1238757

7566-959 ABSTRACT OF THE DISCLOSURE The invention relates to a method of bonding plastic pipes by inserting a plastic pipe into a plastic joint and melt-bonding them together, which is a so-called socket bonding method. The inner circumferential surface of the socket portion of a plastic joint is tapered so that the socket portion becomes progressively smaller in diameter in a direction away from its end portion, or the outer circumferential surface of the end portion of the plastic pipe is tapered so that the end portion becomes progressively smaller in diameter towards its insertion end. When the end portion of the plastic pipe is to be heated, the length from its insertion end of the part to be heated is made nearly equal to the final insertion length of the pipe. When the socket portion of the plastic joint is to be heated, the length from the socket end of the part to be heated is made shorter than the final insertion length of the pipe by a predetermined distance.

498410

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