METHOD AND DEVICE FOR COMPRESSION MOULDING FOR SHELL-AND-CORE ELEMENT MANUFACTURING OF FOR VEHICLE BODY Russian patent published in 2017 - IPC B21D22/26 

FIELD: automotive engineering.

SUBSTANCE: in the first step, the moulded material is pressed against the punch by a pillow to raise the area corresponding to the formed flange at the ends of the groove element and the rib bottom in the direction opposite to the pressing direction. The end of the region to be moulded into the rib in the pressing direction is bent by the cushion, and at least a portion of the noted end is held. In this case, the intermediate article, in which the non-end zone in the region formed into the bottom of the grooved element is not retained, is moulded using a punch and a matrix.

EFFECT: reduced formation of cracks at the edge of the rib flange and formation of folds at the base of the rib flange.

17 cl, 14 dwg