Pre-oiled aluminum foil used for punching various containers, commonly used alloys 8011, 3003, 3004, 1145, etc., with thickness 0.02-0.08mm. Oil coating thickness 150-400mg/m².
The use of aluminum foil as a semi-rigid container to hold food has been widely used at home and abroad. With the continuous development of the national economy and the continuous improvement of people's living standards, people's health awareness has also continued to strengthen, and people's awareness of environmental protection has increased. Rigid container aluminum foil is gradually replacing traditional foam and plastic food boxes.
Semi-rigid container foil is generally made of single-zero foil. In order to make containers of various shapes, aluminum foil needs to be stamped into shape by stamping. However, if the aluminum foil is not treated in any way, the aluminum foil will be scratched due to friction during the stamping and molding process, resulting in a decrease in product quality. Therefore, the surface of the aluminum foil is oiled before stamping. The lubricating effect of the oil protects the surface of the aluminum foil from being affected and improves product quality.
The traditional oiling method is mainly roller coating, which is the most primitive oiling method. Using roller coating to oil the surface of aluminum foil often results in uneven oil content on the surface of the aluminum foil, resulting in uneven production during the stamping process. smooth. If the amount of oil is small, the lubrication effect is not obvious, and the aluminum foil will be scratched; if the amount of oil is too much, the aluminum foil will adhere to the stamping parts and other problems.
Inspired by the anti-rust treatment on the surface of strip steel in the steel rolling industry, people began to use electrostatic spraying to spray the surface of aluminum foil. Whether it is an imported electrostatic oiling machine or a domestic electrostatic oiling machine, the effect is obviously much better than the traditional roller oiling machine.
It not only applies oil evenly, but also saves oil. It has been praised by many customers. It can be seen that the changing shape of the oil after flowing out from the cutting edge of the injection beam can be roughly divided into three stages: oil discharge, atomization, and oil application. When the oil comes out from the cutting edge of the upper injection beam 1, it is relatively thick and sparse negatively charged oil droplets. Under the mutual repulsion of like charges, the oil droplets disperse into small particles when they reach a certain distance from the cutting edge. The farther away from the cutting edge, the smaller the oil particles become, and the number becomes larger. The oil flow gradually atomizes, forming a Such as the injection beam "injection". Negatively charged oil particles move rapidly toward the surface of the aluminum foil along the electric lines in the electric field. Countless densely packed fine oil particles are eventually adsorbed on the moving surface of the aluminum foil, achieving classic oiling.
