| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve such a problem that when a contact part except a welding part generates in vibration welding for joining a resin member, liquid leakage occurs by losing a vibration energy from the contact part to deteriorate weldability.SOLUTION: There is provided a production method for a flow path assembly comprising positioning a protrusion 13 formed to a first welding member 1 by inserting into a hole 22 formed to a second welding member 2 and forming a flow path by welding the joint area of the first and second welding members 1 and 2. The method includes: a positioning step of narrowing the clearance between the protrusion 13 and the hole 22 to the utmost extent at the root side of the protrusion 13 below the half of the height direction of the hole 22; and a welding step of welding the sides of the protrusion 13 and the hole 22 by partially contacting only at the root side of the protrusion 13 below the half of the height direction of the hole 22.</p> |
