| 摘要 |
PURPOSE:To provide the manufacture of a heat pipe, the welded part and pressed part or the sealed part of which has enough strength against breakdown, by a method wherein processes to introduce heat transfer medium in the pipe and the like are applied after the interior of the pipe is evacuated until the predetermined degree of vacuum is reached. CONSTITUTION:Firstly, a heat pipe 8 is connected with an exhauster by means of a vacuum hose 9 in order to start to evacuate, Fig. (1). Secondly, a certain measured amount of preliminarily treated water is sucked in the heat pipe 8 held under vacuum state in order to perfectly degas the residual gas dissolved in the water under vacuum and, after that, to seal it. Thirdly, the heat pipe 8 is pressed with the clamp 3 consisting o two steps of clamps or the upper step clamp 10 and lower step clamp 11 of a press, Fig. (4). Fourthly, a copper pipe extending above the upper step clamp 10 is cut off with knives. The upper end part of the heat pipe is welded by tungsten inert gas welding process under the condition that the pressing with the lower step clamp 11 is kept on being applied, Fig. (7). Finally, the portion ranging from the tip of the welded part 6 to the lower end of the pressed part 5 is made into a bent part by being bent along the axis of the pipe into a U-shape, a semi-circular shape, a chevron shape or the like, Fig. (9). |
