| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively bring a function as a valve by maintaining the joining strength and dimensional accuracy at thermal crimping and to provide this resin valve economically excellent. SOLUTION: When a resin body 1 and a resin cap 12 are fusedly joined together, it is recommented that, before their joining, a plate-like heater 21 is interposed between both joined surfaces 22 and 23 of the body 11, while the body 11 and two fitting parts 24 and 25 of the cap 12 are fitted with each other, and a clearance H between a tip face 26 of this fitting part 24 and a contact surface 27 should be set to that of a nearly totalling portion between thickness W of the heater 21 and depth necessary for thermal crimping, and in time of joining, both these joined surfaces 22 and 23 are heated into fusion by the heater 21, then they are joined together under pressure, and successively this pressure contact is released and simultaneously the heater 21 is removed away, while the joined surface 22 of the body 11 and the joined surface 23 of the cap 12 are heated into crimping, making the tip face 26 of the fitting 24 and the contact surface 27 come into contact with each other, and thus a valve body 20 is made so as to be manufactured by joining the body 11 and the cap 12 together by means of fusion.</p> |
