How to seal the side of the metal packaging iron box

The key to the processing of metal packaging boxes is crimping and welding side seams. There are three methods of edge sealing seams: soldering, fusion welding and glueing. The new welding machine uses a small amount of overlapping, and the metal temperature is just below the melting point, but to increase the welding roller pressure, the two overlapping surfaces must be forged together. The welds destroy the original or painted lubricated surfaces on the inner and outer surfaces, leaving exposed iron, iron oxide and tin on both sides of the welds.

Iron box customization factory In order to prevent products from being contaminated and welds being corroded by products, in most cases, the side seal of metal cans needs to be coated. The side seal of the metal can of monotonous products can be glued, that is, the nylon tape is pasted at the longitudinal seam. After the cylinder is formed, the nylon tape melts and agglomerates.

The tin solder of a tin can is generally composed of 98% lead and 2% tin. The barrel making machine that rolls the blank into a cylinder is paired with the side seam sealing machine for welding. The cylinder is in the production machine. The edge of the slab is cleaned and bent into a hook shape to facilitate fixing of the cylinder when forming.

Then pass the cylinder through the side sealer, add solvent and solder, and preheat the sealing area with a gas spray gun. The longitudinal solder roller is further heated so that the solder flows through the entire solder joint, and then the remaining solder is removed with a rotating scraper, mainly in the form of droplets. The fusion welding method uses the principle of self-consumable welding wire and uses a resistance welding process.