| 摘要 |
PURPOSE:To execute cooling in an extremely short period of time and to improve productivity by successively cooling a work after a vacuum thermal spraying to cooling by using a water cooling means, inert gas cooling means and spray cooling means in a reduced pressure chamber. CONSTITUTION:The work 8 with which the thermal spraying is completed is brought into contact with the base of a water cooling box 2a of the water cooling means 2 while the work is rotated on a turn table 7 in the reduced pressure chamber. The water in the box 2a is replaced by a hose 11 and the cooling of the work is executed. A temp. measuring control panel 19 blows the inert gas from the nozzles 3a of the inert gas cooling means 3 in place of the water cooling means 2 and cools the work in a contactless state when the temp. of the work 8 measured by a radiation thermometer 18 attains a prescribed temp. The control panel 19 supplies a refrigerant 16 to the nozzles 3a of the spray cooling means 4 and cools the work 8 down to the prescribed temp. by the refrigerant 16 when the work 8 cools down to the prescribed temp. The cooling of the work 8 is thus executed by successively changing the cooling means according to the temp. thereof, by which the cooling of the work 8 is executed in an extremely short period of time. |
