PURPOSE: To prevent positional deviation of a molded parts, by a method wherein at a stage of the molded parts comprised of a ceramic molding material, protrusion formed on the molded parts is fitted in a through hole and after the molded parts are assembled into a final product form by caulking the tip of the protrusion, the same is burnt.
CONSTITUTION: A vessel part 10 constituting five faces of a rectangular parallelepiped excluding the top and a lid part 20 constituting the remaining one face are molded of a ceramic molding material as separate parts from each other. A plurality of protrusions 11 projecting in a pinlike state are formed on the top of the vessel part 10 and a through 21 in which the protrusion 11 is fit is kept formed on a position of the lid parts corresponding to the protrusion 11 when the lid part is put over the vessel part 10. Then when the lid part 20 is put over the vessel part 10 and the through hole 21 is fitted over the protrusion 11, they become a state where the tip of the protrusion 11 is projected a little upward of the through hole 21. Then the protrusion 11 is caulked by pressing a processing horn 30 of an ultrasonic welder against the tip of the protrusion. A molded product whose assembly ad caulking process are completed is burnt by putting into a furnace. With this construction, a matter where joining strength between the molded parts is high and unification of a plurality of constituent parts is high can be manufactured.
KONDO SADAAKI
KATABUCHI OSAMU
