Cold Extrusion Process for Producing Steel Bucket Sealer Loops

Cold extrusion process for producing barrel closure coils (1274624)

The invention provides a new process for manufacturing the steel barrel sealer coil of a packaging container and changing the cutting of the inner diameter of the curling portion into a cold extrusion method using a press. By improving, the smoothness of the current crimping part is improved and the life of the closed loop is improved. The process includes blanking and drawing, trimming the port cover, leveling the flange and chamfering the upper inner surface, squeezing the inner diameter of the crimping, etc., characterized in that the material is supplemented to the upper end surface by the chamfer of the inner diameter of the upper end of the drawing wall. The rounded corners of the outer wall are filled with the material needed to remove the inner diameter of the reaming hole of the curling part to the required inner thread part of the lower part.