Pipe mold with compensation for pipe shrinkage

Details Pipe mold with compensation for pipe shrinkage Pipe mold with compensation for pipe shrinkage

B - Operations, Transporting

29

C

B29C 47/08 (2006.01) B29C 47/12 (2006.01)

Patent

CA 2307798

Pipe molding apparatus having a moving mold tunnel includes an upstream and at least one downstream mold block. Each mold block comprises mold block sections which close with one another to form the pipe and which open relative to one another to release the pipe. The mold blocks move downstream of the apparatus together with one another when forming the pipe and move upstream separately from one another when releasing the pipe which cools and shrinks in both diameter and length in the mold tunnel. Each mold block has a hollow pipe forming region with the pipe forming region of the downstream mold block being decreased in both diameter and length relative to the pipe forming region of the upstream mold block to compensate for the plastic shrinkage.

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