| 摘要 |
PURPOSE:To increase the density of hollow parts. to simplify the operation for production and to improve the efficiency of production by longitudinally twisting plural pieces of unit extrudates which are paralleled to a bundle state and have the hollow parts, thereby uniting the same into one body. CONSTITUTION:The extrusion-molded unit extrudates 2 and single extruded pipes 4 are preliminarily cut to a prescribed size. A prescribed number of the cut extrudates and pipes are paralleled and the outside peripheries are tentatively bundled by band members to form a bundle; thereafter both ends of the bundle are gripped by clampers of a twisting machine and the bundle is twisted at required angles. The unit extrudates are thoroughly entangled with each other by the above-mentioned method and since the operation for production is simple, the efficiency of production is improved.
|
