Title:
【発明の名称】二軸延伸されたポリ塩化ビニルの管にソケットを成形する方法
Document Type and Number:
Japanese Patent JP2000506455
Kind Code:
A
Abstract:
A method for forming a socket on a pipe of biaxially oriented polyvinyl chloride including: placing a support in an end section of the pipe, heating the pipe in the region of the end section; deforming the pipe to produce a socket in the region of the heated end section, the heated end section being supported internally while the socket is being formed; cooling the pipe in the region of the end section, the end section being supported internally during the cooling operation; and removing the support from the pipe. For the purpose of heating the internally supported end section of the pipe, the end section is first heated until the end section has reached, substantially homogeneously, the glass transition temperature of polyvinyl chloride and is then further heated until the end section has reached, substantially homogeneously, a temperature near, preferably just above, the orientation temperature of polyvinyl chloride.
Inventors:
Vise, Jan
Application Number:
JP53246397A
Publication Date:
May 30, 2000
Filing Date:
March 10, 1997
Export Citation:
Assignee:
Veavin Bethrothem
International Classes:
B29B13/02; B29C57/04; B29K227/06; (IPC1-7): B29C57/04; B29B13/02
Attorney, Agent or Firm:
Chika Takagi (1 person outside)