PLASTIC SPIRAL WINDING PIPE, MANUFACTURE THEREOF AND MANUFACTURING EQUIPMENT

摘要

PURPOSE:To strengthen a spiral projecting part which is cut, split and weakened and to retain the shape and to obtain a spiral wiring pipe which is excellent in pressure resistant strength properties and shape retaining properties and has high quality by filling fluid substance into the hollow part formed in a pipe main body via the cut and split part through which a core material is taken out and solidifying the fluid substance. CONSTITUTION:A plastic spiral winding pipe 51 is constituted of a pipe main body 53 spirally having hollow parts 52 and the filled layers 54 which are formed by filling the mixed material being in a fluid state into the hollow parts 52. The pipe main body 53 is formed of the inner pipe parts 55 described hereunder and the spiral projecting parts 56 integral to the surfaces thereof. The inner pipe parts 55 are formed by comparting the hollow parts 52 along the lengthwise direction of the plastic bandlike bodies 1 in these insides while spirally winding the said bodies 1. In the spiral projecting parts 56, the filled layers 54 are formed by filling the mixed material being in a fluid state into the hollow parts 52 via the cut grooves C as the continuously cut and split parts which are formed by cutting and splitting the outermost circumferential parts of the bodies 1. The cover plate parts 2 are joined so as to cover the cut grooves C.