| 摘要 |
PURPOSE:To arrange a heat insulating layer at the desirable position, to improve the operational efficiency and to conceal the heat insulating layer from outer part by forming as laying the heat insulating forming body having the specific shape in the described position at the time of nozzle forming. CONSTITUTION:The heat insulating forming 2 made by impregnating a paraffin therein composing of aggregate of ceramic fibers is laid in the side wall of nozzle body 1 and formed by a rubber press. This is baked under non-oxidizing atmosphere in the coke-breeze to obtain the nozzle having the heat insulating layer 3. In this way, the heat insulating layer is arranged at any desirable position and further the nozzle having longer heat insulating layer is obtd. |
