| 摘要 |
PURPOSE:To make injection molding performable as well as to prevent an electrode from being ozidized, by molding a whirl chamber with a ceramic material inclusive of an organic binder and, after forming a conductive ceramics layer by means of cutting this molding body, degreasing the organic binder. CONSTITUTION:In this heating type whirl chamber, each of vertical blocks 21, 22 is subjected shrinkage fitting in a ring 24, while an outer circumference of this ring 24 is fitted in a cylinder head 25. The lower block 22 is provided with a buried heater 23 inside, while each of electrodes 23A is embedded in both sides of the heater 23. In this case, this lower block 22 is molded with a ceramic material inclusive of an organic binder. Then, this molding body is machined so as to cause both ends of the heater 23 to be exposed, while a conductive ceramic layer is formed in this cutting part. Afterward, the organic binder is degreased and simultaneously sintered. With this constitution, the lower block 22 is made possible for injection molding and, what is more, the electrodes 23A are prevented from being oxidized. |
