| 摘要 |
<p>PURPOSE: To provide a high frequency welding apparatus in which a pair of resins can be easily and effectively welded from both sides of a cylinder made of resin. CONSTITUTION: A high frequency welding apparatus comprises a lower mold 12 and an upper mold 13 disposed above and below a central conductor 14 externally inserted with a cylinder to bring a pair of resin sheets into close contact with the conductor 14 in such a manner that the molds 12, 13 connected to a ground potential are electrically connected with a conductor 15 in a first state t,o supply a high frequency current to the conductor 14 to weld the sheets to the outer periphery of the cylinder, and then the conductor 15 is set to a second state separated from the molds 12, 13 to supply the current to the mold 13, thereby completing the welding.</p> |
