Title:
【発明の名称】電気溶着継手の製造
Document Type and Number:
Japanese Patent JPH11502780
Kind Code:
A
Abstract:
A method for the manufacture of an electrofusion fitting comprises the following steps: (i) assembling an electrical heating element 7 and a layer in the form of a mesh tube 13 of thermoplastic polymeric sheet material on a support member which is a collapsible winder mandrel 1; (ii) heating the layer of thermoplastic polymeric sheet material in order to soften the material and cause it to flow in order to form a shape-retaining structure 14 with the electrical heating element 7; and (iii) moulding a body of thermoplastic polymeric material over the structure produced in (ii) and mounted on a collapsible mandrel to form an electrofusion fitting 26. The structure 14 is removed from the mandrel 1 before the final step of moulding over the structure 14.
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Inventors:
White, peter
Application Number:
JP52810296A
Publication Date:
March 09, 1999
Filing Date:
March 21, 1996
Export Citation:
Assignee:
Uponol Limited
International Classes:
B29C65/34; B29C70/82; B29D23/00; F16L47/02; (IPC1-7): B29D23/00; B29C65/34; F16L47/02
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)