| 摘要 |
PURPOSE:To make uniform the plasma treatment on the surface of a material to be coated such as a bumper or the like by providing a plasma introducing port roughly at the center of a plasma injection pipe and forming many injection ports in a specific state on both sides of said introducing port. CONSTITUTION:A plasma introducing port is formed roughly at the center of a stainless steel injection pipe 17 for injecting gaseous plasma such as oxygen contained in a main unit and an introducing pipe 18 connecting to a plasma supply device is connected thereto. Many injection holes 19 of which the disposition space decreases gradually toward the end side of the pipe 17 and the inside diameterd decreases gradually are formed on the outside circumference of the pipe 17 on both sides of the introducing port. Therefore if the gaseous plasma is introduced through the pipe 18 into the pipe 17 during operation of the main unit, the gas injected from the respective ports 19 activates uniformly the surface of a material to be coated such as a bumper according to the diameter and disposing condition thereof thus making painting easy.
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