Rotating-layering mold and press apparatus comprising rotating-layering mold

A rotating-layering mold of rotating, according to a predetermined angle, plate materials punched by a cooperation of an upper mold and a lower mold so as to laminate the plate materials, wherein the rotating-layering mold comprises a squeeze ring provided with a holding hole of holding the punched plate materials, wherein:

• the squeeze ring is configured to rotate with respect to the lower mold such that an outer peripheral surface of the squeeze ring lies along an inner peripheral surface of the lower mold;
• the rotating-layering mold further comprises a first thrust bearing, a second thrust bearing, and a radial bearing in order to support the rotation of the squeeze ring with respect to the lower mold;
• the rotating-layering mold further comprises a first inner ring portion and a second inner ring portion, and the first thrust bearing, the second thrust bearing, and the radial bearing are arranged between the first inner ring portion and the second inner ring portion;
• and
• the first inner ring portion and the second inner ring portion are fastened such that the first thrust bearing and the second thrust bearing are in a preloaded state.