Calibration unit for plastic blow-molding machines includes sections spring- loaded by Belville washer packs, holding mandrel in operational position in carrier, with hydraulic release system

摘要

Sections (70, 72, 158b; 108, 118, 122) securing the mandrel (18) on the mandrel carrier (158) are spring- (183; 190) loaded into their operational positions. Hydraulic pressure (119) moves the sections into their release positions. The gripping system resembles a dual conical collet (116, 112), with seals (115) for the hydraulic supply (119) which form, in effect, the release piston.