| 摘要 |
<p>PURPOSE:To prevent generation of variability of fusion welding and permit fusion welding, strong and having perfect seal effect, by a method wherein protruded walls of two pieces of plastic blocks are opposed while a high-frequency welder horn is provided with a groove of arced section and high-frequency vibration is given to the horn under pushing the upper bottom of the groove against opposing protruded walls. CONSTITUTION:The upper ends of protruded walls 7, 8 are situated in the same level and the back surfaces 7', 8' thereof are slanted to reduce the thickness of respective protruded walls upwardly while the upper bottom 10' of the annular groove is pushed against the protruded walls 7, 8 from the upper side thereof and high-frequency vibration is applied to the horn. When melting of the walls is progressed by and by by the high-frequency vibration and the hights of both protruded walls are lowered gradually, both of the protruded walls are closed mutually toward the opposing walls by the inclinations of the back surfaces 7', 8' of respective protruded walls and the arced configuration of the annular groove 10 of the horn. Accordingly, the molten plastics flows into the clearance 9 between opposing protruded walls whereby the walls are integrated and the section 12 of fusion welding may be formed.</p> |
