| 摘要 |
PURPOSE:To stably manufacture the metallic tube for composite tube with the prescribed outer diameter by making the metallic sheet cylindrical by bringing it in slide contact with the inner circumferential surface of the outer die, welding the side edge parts, then shaping it by passing it through the hand drum like roller. CONSTITUTION:Al sheet which is put between the outer circumferential surface of resin passing tube 42 of the inner die 40 and the inner circumferential surface of linear in the outer die 51 comes in slide contact with inner circumferential surface of the cylinder like space in the linear and formed to the cylinder like shape having section of complete round. The outer peripheral side parts of each side edge parts of Al sheet 10 passed through the outer die 51 is brought in rolled contact with the phone 52 of the super sonic welder, and the side edge parts are welded each other. In this time, the molten resin is pushed out from the resin passing tube 42, and the inner circumferential surface of Al tube is lined. Next, the outer circumferential surface of Al tube is reduced its diameter by passing Al tube between the curved surface 21a of the hand drum like roller 21 of the shaping machine 20. And, the upheaving of the outer circumferential surface of the welded part is removed. |
