| 摘要 |
PURPOSE: A method for fabricating rotation mold is provided in which drilling and tapping operations for forming a screw on boss are not required. CONSTITUTION: The method for fabricating rotation mold comprises a prototype fabrication step of fabricating a prototype(10) of boss to be adhered to the surface of the rotation mold and forming a through hole at one side of the prototype; a sand mold preparation step of fabricating a sand mold(41) by hardening the molding sand after inserting a nut(20) into the through hole of the prototype fabricated in the prototype fabrication step, fastening a bolt(30) to the nut, inserting the bolt fastened prototype into a mold frame and injection molding sand into the mold frame; casting step of injecting molten metal into the sand mold after removing the prototype only by leaving the bolt and nut at the sand mold fabricated in the sand mold preparation step; surface treatment step of finishing the surface of the boss after separating a boss completed in the casting step from the sand mold; boss assembling step of adhering the boss to the rotation mold by welding the boss completed through the surface treatment step to the lower edges formed on the surface of the rotation mold; and a mold fixing step of fixing the rotation mold by welding the head of the bolt fastened to the boss adhered in the boss assembling step to a mold supporting structure.
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