| 摘要 |
PURPOSE:To unnecessitate the machining process of inner-outer diameters after die casting and enhance the centering accuracy, by die cast forming in the state wherein a mandrel incorporated into a transfer metal mold and a movable metal mold is pressed fit in the inner diameter of an iron core by the clamping force of the metal mold. CONSTITUTION:The mandrel 11 is incorporated respectively into the fixed metal mold 1 and the movable metal mold 3 for a die casting, a laminated iron core 6 is set, and thereafter the mandrel 11 is pressed fit in the inner diameter part of the laminated iron core 6 by utilizing the clamping force of the metal mold. After Al die casting in this state, mold opening is performed, and an extrusion device 9a is operated resulting in the extrusion of a product by pressing the end surface of the iron core by a plurality of ejector pins 12. Thus, the working efficiency is improved, and the work after a die casting is unnecessitated. Further, deformation of flaws are not caused when extruding a product, and accordingly the quality of the product can be kept constant. |
