| 摘要 |
PURPOSE:To shorten heating time and to improve heating accuracy by arranging a nozzle as well as providing a hollow duct on a heat source and installing a blast means capable of adjusting a discharge speed on the nozzle. CONSTITUTION:The duct 13 blowing a hot blast into the heat source 11 of a heating furnace, etc., is provided and a nozzle 14 is arranged at its tip as well. The high temp. gas generated from an adjustable heat source 11 is blown into the duct 13 via a blast means 12 and injected from the nozzle 14. In this case, a diaphragm mechanism is provided on the nozzle 14 and the host blast from the nozzle 14 finely adjusts the heating quantity according to the size of the thermal capacity of the element of the body to be heated. The heating of a base plate 2b is executed corresponding to the uneven distribution of the thermal capacity of the body to be heated accordingly. Consequently the heating time of the base plate 2b is shortened and this heating accuracy is improved.
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