| 摘要 |
PURPOSE:To shorten the operation time of a degreasing and sintering furnace as well as to ensure high quality for a sintered product by measuring the concn. of impurities in exhaust gas, starting the rise of the internal temp. of the furnace according to the measured results and carrying out a sintering stage. CONSTITUTION:A heating chamber 3 is placed in the body 2 of a degreasing and sintering furnace 1. A material 4 to be treated is put in the chamber 3, where it is degreased and sintered by heating with heaters 5. A sensor 10 is fitted to an exhaust pipe 8 and the concn. of gaseous impurities in exhaust gas is measured with the sensor 10. The concn. is high at first but lowers gradu ally in accordance with the progress of exhaust. When the concn. lowers to a prescribed value, an output signal is sent to a controller 11. The controller 11 increases the quantity of heat generated by the heaters 5 and starts the rise of the internal temp. of the furnace 1. The furnace 1 is heated to a pre scribed sintering temp. and kept at the temp.
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