APPARATUS FOR CORRUGATING TUB BLANKS BY SUCCESSIVE ANNULAR CORRUGATIONS Russian patent published in 1996 - IPC

FIELD: hydraulic formation of articles with annular corrugations such as bellows and compensators. SUBSTANCE: apparatus has a multiplicator with a mandrel, secured to a frame. On a cantilever of the mandrel a sealing unit is arranged. That unit has a hydraulic cylinder for compressing sealing rings, concentrically with the which a sleeve-type die and a half-die unit are arranged in halves of a holder, mounted in guides of a mechanism for their bringing together. The guides are secured to a vertical plate, stationary mounted on the frame. A mechanism for axial motion of the sleeve-type die is in the form of a hydraulic cylinder, whose body is secured to the frame and whose double-side rod has a central opening, in which the sleeve-type die is mounted, that die being disconnected and having an outer annular protrusion. A front end of the sleeve-type die has a possibility of passing between openings of the half-fie unit; its protrusion periodically engages with rests, mounted on the half-die unit. EFFECT: enhanced efficiency of the apparatus. 1 cl, 5 dwg