| 摘要 |
PURPOSE:To maintain the temp. of powder for cladding always at a prescribed value by preheating the powder for cladding to a prescribed temp. by heating means mounted to at least one of a storage part, flow path and discharge part and transmitting the temp. detected on a discharge port side to a temp. control means. CONSTITUTION:The heating means, such as flexible ribbon heaters 11, are wound and circumferentially provided on a hopper 2, a power supply pipe 5 and a powder feed nozzle 7 and the powder 1 for cladding is indirectly heated while the powder passes the inside of the hopper 2, the powder supply pipe 5 and the powder feed nozzle 7. The temp. detected from a temp. detecting means mounted near the injection port of the powder feed nozzle 7 is sent as an electric signal to a temp. controller. The temp. controller judges the detection temp. by receiving this detection signal. The controller sends the output to the respective ribbon heaters 11 to turn on the heaters when the detected temp. is lower than the preset temp. The controller stops the output to turn off the heaters when the detected temp. is higher than the prescribed value. |
