| 摘要 |
PURPOSE:To prevent solidification of wax kind splashed from powder green compact in a vacuum pump provided on the way of an air exhaust system for a vacuum furnace by pouring softening agent into the air exhaust system for vacuum furnace at the time of executing vacuum sintering to the powder green compact by using the vacuum furnace. CONSTITUTION:In the typical de-wax treatment at the time of executing the vacuum sintering to the powder green compact using the vacuum furnace 11, in the case of using the air exhaust system 21 of valve 41 mechanical booster pump 31 valve 42 rotary pump 32, the softening agent of kerosene, machine oil, etc., is poured into the air exhaust system 21 just in front of each of the mechanical booster pump 31 and the rotary pump 32, and in the case of using the air exhaust system 21 of valve 43 bypass system 22 valve 44 rotary pump 52, the softening agent is poured into the air exhaust system 21 just in front of the rotary pump 32. |
