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    • 10. 发明专利
    • PIPE FORMING MACHINE
    • JPS6356432A
    • 1988-03-11
    • JP20049186
    • 1986-08-27
    • SEKISUI CHEMICAL CO LTDSEKISUI KOKI SEISAKUSHO KK
    • FUJII SHIGEKIFUJIKI YASUOMORIKAWA KENICHIMOTOMURA SHIGENOBU
    • B29C53/72B29C53/82B29L23/00
    • PURPOSE:To obtain a pipe forming machine capable of easily altering the diameter of the cylindrical space formed by respective pipe forming rollers by simple operation, by introducing a strip like material into the cylindrical space formed by the pipe forming rollers and spirally winding the strip like material introduced in a state contacted with the pipe forming rollers under rotation. CONSTITUTION:The lower end part of an introducing guide 70 is mounted to the roller shaft 51 of each pipe forming roller 50 and a strip like material to be manufactured into a spiral pipe is introduced into the cylindrical space formed by respective pipe forming rollers 50. An introducing roller 80 holds the strip like material fed by the introducing guide 70 along with the opposed pipe forming roller 50 to introduce the same into the cylindrical space formed by the pipe forming rollers 50. The diameter of the cylindrical space is altered by revolving a revolving frame 30 with respect to an annular frame 20. The strip like material introduced successively contacts with the pipe forming rollers 50 under rotations to be bent forcibly. Since the strip like material is contacted with the pipe forming rollers 50 under rotations so as to always cross said rollers 50 at a right angle, the strip like material is spirally wound at the predetermined spiral angle formed by each pipe forming roller 50 and the adjacent side parts of the strip like material are mutually engaged to form a spiral pipe having a predetermined caliber.