Production process requirements for iron canisters
Tin can making process:
The use of internally painted empty cans, in order to improve the corrosion resistance of metal packaging tin can containers; at the same time, the electrochemical action of the metal can dissolve a small amount of iron in the metal iron box, in the form of divalent iron In the sealed canned food, it is easily absorbed by the human body and is beneficial to human health needs.
Making stamping. That is, a punch of a punch is used to punch a flat plate into a cylindrical die to deform the metal flat plate into a circular iron can. The diameter of the iron box formed after the initial stamping can be reduced by applying a re-stamping process.
The iron plate is cut into rectangular iron pieces, the blanks are rolled into a cylindrical shape, and the joints of the two ends are longitudinally welded to form a cylindrical shape. One end of the cylinder and the round end cover are mechanically rolled and sealed, and the other end is filled with the prepared can lid to form a packaging iron can. The container is composed of a can body, a can lid and a can bottom. Three piece cans. Generally, three cans are used for the iron cans, two cans for the aluminum cans, and offset printing for the patches. These three cans are not easy to hold candles. It is easy to leak. If it is necessary, it is recommended to apply glue (not including tax) to prevent wax leakage. Usually this three-piece can also needs to prevent the outer surface from rusting, and printing is still required. In the production of three-piece cans Note: Before the end folding process, the angle should be cut and cut; in the soldering process, the solder joints should be cleaned after soldering. After cooling, the flanges are turned and the can body is finished.