| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a choke valve which can properly obtain an amount of slack of a film material to the interior of a recess of a valve chamber. SOLUTION: The manufacturing method comprises the first process of preparing a valve body 49 with the recess 56 for valve chamber formation formed at a joining sealing face 55, and expanding the valve body 49 by heating to a predetermined temperature; the second process of placing the film material 63 with a flexibility on the joining sealing face 55 by applying a tensile force to the film material; the third process of forming the valve chambers 43a-43f by pressing and joining the film material 63 placed on the joining sealing face 55 to the joining sealing face 55 under a heating condition; and the fourth process of forming a predetermined slack amount L to a part of the film where the valve chambers 43a-43f are formed, by cooling the valve body 49 and the film material 63 thereby allowing the valve body 49 to shrink. The slack amount L of the film material 63 can be surely formed at the time of joining the film material. COPYRIGHT: (C)2005,JPO&NCIPI |
