Method of manufacturing bottle type can

Abstract

A method of manufacturing a bottle type can having a neck part, a shoulder part, and a body part formed integrally with each other, comprising the step s of punching, to form in a cup shape, a coated metal sheet having the both surfaces thereof formed with thermoplastic resin coating layer and coated wi th lubricant, forming a cup-shaped can further to a bottomed cylindrical can having the body part with small diameter and thin wall, forming the bottom side of the bottomed cylindrical can into the shoulder part and an unopened neck part, removing lubricant at least from the outer surface of the can wit h the unopened neck part and opened lower end of the body part, applying print design to the outer surface of the body part from which lubricant was remove d, and, after cutting, to open, the tip part of the unopened neck part, forming the cut end part to a curl part and also forming a thread part at a position lower than the curl part, whereby a protective film can be provided uniforml y on the metallic surface of the can, and a print for decoration can be provid ed satisfactorily on the outer surface of the body part of the can, and a conventional transfer device by a vacuum and pressurized air injection mechanism can be diverted to a device for handling the can in the printing step.

Description

[0001] This application is a divisional application of the Chinese patent application number 00803098.7 with the filing date being September 27, 2000 and titled "Method for Manufacturing a Bottle-shaped Can". technical field [0002] The present invention relates to a method of manufacturing a bottle-shaped can whose body, shoulder and neck are integrally formed from a sheet metal, and more particularly, the present invention relates to a method of manufacturing a bottle-shaped can whose outer body The surface or the outer surface of the part from its body to its shoulders is decorated with printing or the like. Background technique [0003] For beverage cans used for various soft drinks (non-alcoholic beverages), fruit juices or beer, two-piece cans are generally used, and the tank body (or side wall part) and the tank bottom (or end wall part) are both integrally formed. Such two-piece tanks are manufactured by suitable methods such as deep drawing and thinning, deep draw...

AI Technical Summary

Problems solved by technology

In this way, the problem caused by the transformation of the printing equipment is that it requires a high cost on the equipment, thus greatly increasing the manufacturing cost of the tank.

[0049] In addition, since the bottle-shaped can body must be grasped for conveyance, this causes the problem of reducing the conveying speed and thus reducing the printing speed.

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