Reinforced multi-walled pipe and method for its manufacture
    3.
    发明公开
    Reinforced multi-walled pipe and method for its manufacture 审中-公开
    VerstärktesMehrwandrohr und Verfahren zur dessen Herstellung

    公开(公告)号:EP1231423A1

    公开(公告)日:2002-08-14

    申请号:EP01830094.7

    申请日:2001-02-13

    发明人: Codignola, Franco

    IPC分类号: F16L9/18 B29C53/58

    摘要: A reinforced tubular manufactured article consists of two concentric tubular layers or cylinders (10,12) respectively inner and outer, preferably made of glass fibre reinforced polyester resin, there being housed in the gap between said two cylinders a reinforcing element (14) consisting of a tubular element, preferably a knurled tube, wound in a helical spiral of predetermined pitch about said inner cylinder.
    The winding of said knurled tube (14) on the inner cylinder (10) is carried out when the cylinder is only just formed and the polyester resin which constitutes it is still in the paste-like state, so that the resin penetrates into the surface hollows or knurling of said reinforcing tube (14).

    摘要翻译: 增强的管状制品由分别内部和外部的两个同心的管状层(10,12)组成,优选由玻璃纤维增​​强的聚酯树脂制成,其中容纳在所述两个圆筒之间的间隙中,加强元件(14)由 管状元件,优选滚花管,以预定间距围绕所述内筒螺旋形螺旋形卷绕。 所述滚花管(14)在内筒(10)上的卷绕是在刚好形成圆柱体时进行的,构成它的聚酯树脂仍处于糊状状态,使得树脂渗入表面 所述加强管(14)的中空或滚花。