Method of high-frequency weldering

Abstract

Abstract PURPOSE:To obviate occurrence of a blurred pattern or defective bonding even if a work has a curved surface, by pressurizing a pressurizing electrode through the hollow section thereof using a fluid to pressurize the work so that a pressure is applied uniformly to every part of the work. CONSTITUTION:A work W is placed between a pair of electrodes 1, 2 with a skin material w1 of the work (W) upside, and an oil is forced into the hollow section 5 of the upper electrode 1 via an oil injection pipe 6. Then the pressure of this oil works on the electrode 1 so that the pressure may be equally applied to every part of the work W. Then a high-frequency voltage of about 40-70MHz from a high-frequency power source 7 is applied between the electrodes 1, 2. Then a high-frequency electric field acts on the work W, resulting in an dielectric loss in the skin material w1 so that the skin material w1 softens due to the internal heat built-up. Therefore, if a profile is formed on the upper electrode 1, the profile will be copied to the surface of the skin material w1. Further, if an additional skin is inserted between the upper electrode 1 and the work W, it will be fused to the work W.

Inventors

• 👤 Masami Fujiwara
• 👤 藤原　正己

Bibliographic Details