BIDIRECTIONAL DOUBLE-PUNCHING CAN BODY STRETCHER

摘要

A bidirectional double-punching can body stretcher is characterized in that a can body stretcher for a zip-top can in a bidirectional double-punching structure is formed by using two sets of punching rod drive mechanisms that are the same through a design solution of sharing the same crank shaft in structural design. In the solution, after the crank shaft is shared by the two sets of punching rod drive mechanisms, the two sets of punching rod drive mechanisms are arranged in a symmetrical layout, so as to balance inertial forces of components in motion, such as an oscillating rod, a sliding block, and a punching rod, and a reacting force produced in a process of forming a can body, thereby significantly reducing the load on a crank shaft support bearing, lowering requirements on design and machining of the bearing, and prolonging the service life. Besides, in the present invention, one device can realize the capacity of two conventional can body stretchers, and compared with the two conventional can body stretchers, the manufacturing cost of the device is reduced and energy consumption is also decreased.