| 摘要 |
PURPOSE:To perform satisfactory reflow soldering by surrounding a part from a motor of a blower for circulating inert gas and its rotation axis to an inert gas chamber by a shielding case and cooling the inert gas therein. CONSTITUTION:The inert gas is heated by a heater 2 and circulated in the inert gas chamber 3 and a substrate 11 is heated and subjected to reflow soldering. The whole part extending from the motor 5 to drive the blower 4 circulating the inert gas and this rotation axis 5a to the inert gas chamber 3 is then surrounded by the shielding case 6 and cut off from the outside air. The inside of the shielding case 6 is then filled up with the inert gas and the inert gas in the shielding case is cooled by using a refrigerating machine 9 and the blower 8. Consequently, the consumption of the inert gas can be reduced and the running cost can be reduced. |
