The raw material of the tin box is tinplate. Therefore, the first step in making a tin box is how to print the pattern on the tinplate. Iron box printing uses the physical properties of water and ink to repel each other. It uses the pressure exerted by the roller to transfer the graphics and texts on the printing plate to the tinplate through the blanket. This is the commonly known principle of offset printing. The tinplate has special physical and chemical properties and printing adsorption capacity, and the printing process and offset printing are different. After finishing all the colors, the tinplate needs to be coated with a layer of bright oil on the surface, the purpose is to improve the surface gloss, but also to increase the hardness of the iron material, so that the printing ink layer has a certain degree of flexibility and corrosion resistance, so A dazzling tin box printing package can be produced.
Then the printed iron material finished product is punched on the machine. Stamping is a metal processing technology that is widely used in plastics, metals, etc. It is a process of forming iron materials in an instant by applying pressure. Process the tinplate into the required shape and semi-finished products. And stamping is also divided into cold stamping and hot stamping: cold stamping is metal processing at room temperature, generally suitable for iron materials with a thickness of less than 4mm, and has the advantages of high productivity, high precision and strong stability.
The iron box production process under general conditions is: iron material-cutting-stamping-assembly-packaging. The stamping process is an important step in the forming of the iron box.
The general process of iron box stamping can be divided into: cutting-pre-bending-cutting angle-forming-buckle-stamping-back cover.