The production for the rolling of the tinplate lid TFS easy open end

Rolling is to roll the cover edge punched out by the basic cover die into an arc shape. There are usually three types: one is to press out the arc edge by the punching die, this is to have a punch specially used for the edge blanking or there are two stepping dies on the same punching machine, the first step is blanking, the second step Press the edge. This form is more complicated and the investment is also large, but the size of the curling edge is relatively stable, and the quality of the cover shape is high. The second form is similar to the form of the crimping machine, and the crimp is formed by the pressure roll master and the cover roll. This form has been gradually abandoned due to its complex structure and difficult adjustment. The third form is the most widely used and simple: this type of crimping machine is mainly composed of a rotating disc, an outer mold and a pallet. The outer mold generally has 5 to 8 molds that are installed on the base and can be adjusted and distributed in an involute on the rotating disk. When the cover enters the crimping machine, the rotating disk drives the rotation to roll along the outer mold, and the outer mold of the rotating disk has arc-shaped grooves. As the distance between the outer mold and the rotating disk gradually decreases, the process of crimping is realized by pressing the cover groove to deform along the arc groove of the inner and outer molds. The function of the pallet is to ensure that the cover is not bent and deformed downward during the crimping process.