APPARATUS FOR PRODUCTION PIECE WITH SALIENT-CONCAVE SHAPE OF METAL SHEET Russian patent published in 1997 - IPC

FIELD: material mechanical shaping of metal sheet to produce with salient-concave shape, to produce decorating panels with pattern. SUBSTANCE: metal sheet blank is set on die. During blank passing between die and metal shaft with rims sheet blank edges are bent by the shaft rims along rib of die with formation of longitudinal sides. Simultaneously, during action of flexible shell on pressing transversal side of blank is formed. Formed sides are holding blank during is passing between die and shaft with flexible shell at instant of pattern formation, that allows to increase quality of produced pieces and to produce good pieces of big length. EFFECT: increased quality of produced pieces. 3 dwg