| 摘要 |
PCT No. PCT/SE83/00110 Sec. 371 Date Oct. 27, 1983 Sec. 102(e) Date Oct. 27, 1983 PCT Filed Mar. 25, 1983 PCT Pub. No. WO83/03374 PCT Pub. Date Oct. 13, 1983.Method for the manufacture of a conical tubular member, and a conical tubular member manufactured according to the method, wherein as a first step a tubular member is formed having inwardly directed profilings (2, 2+40, 3, 3'), and said member thereafter is placed over a core with grooves arranged to receive said profilings (2, 2', 3, 3') and having a conical shape substantially corresponding to the internal shape of the member to be manufactured. By means of hydraulically and/or pneumatically applied force, divided over the surface of the tubular member by means of at least one flexible pressure applying member arranged surrounding the tubular member, said member is thereafter formed into a conical shape corresponding to the shape of the core, the reduction in diameter of the member being compensated for by means of a change in the shape of the profilings (2, 2', 3, 3'). The member is advantageously manufactured from a material having through perforations, or a wire mesh material.
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