| 摘要 |
PURPOSE:To develop a hot-air heating apparatus of a circulation type which can raise the temperature of an extrusion-molded body such as rubber or of a rolling-molded body while removing smoke and odor. CONSTITUTION:A hot-air generator 56 is made to operate at a temperature near a combustion temperature (at which hot air of high temperature is generated) of smoke and an odor gas produced by a rise in the temperature of molded body 66, and air of low temperature is mixed in the hot air of high temperature generated by the hot-air generator 56, so that the temperature of this hot air of high temperature be lowered near to a necessary temperature for raising the temperature of the molded body 66. While part of this hot air of which the temperature is lowered is exhausted midway from an exhaust duct 53, it is sent to a heating chamber 50 and also returned to the hot-air generator 56 from the heating chamber 50, in which its temperature is raised again to be high. |
