Application of Magnesium Alloy Material Etching Plate（二）

After the magnesium plate is rolled by the hot rolling mill and tempered, the thickness is uniform, the thickness tolerance is extremely small, and there is basically no anisotropy, which eliminates the internal stress of the plate. In addition, the yield strength of the etched magnesium plate reaches more than 200MPa, which is stronger than the rigidity. Therefore, no matter in the process of hot stamping and embossing after sticking the plate, or after the plate is lifted for a period of time and then used, if the operation is done properly, it will not produce Deformation phenomena such as edge warping, middle bulging, and layout distortion.

In the production industry of New Year pictures, couplets, blessing characters, invitations and other products, the speed and efficiency of hot stamping determine the cost of the product, and the huge production quantity produces economies of scale. Etched magnesium plate is more and more used because of its remarkable advantages of fast heat transfer, no deformation and high printing durability.

In drop plastic, leather embossing, high frequency mold, thermal transfer, clothing trademark and Logo, self-adhesive knife mold, shoe sole mold, conference logo, door sign, medal, nameplate, product trademark, badge, Braille sign and other products, Etched magnesium plates are also widely used abroad.

The specific gravity of magnesium is 1.738, and the interior has a hexagonal lattice structure. Its specific gravity is 1/5 of that of copper and 1/4 of that of zinc. Etched magnesium plate has advantages in transportation, installation and sticking, storage, etc. due to its small mass and light weight.

The heat capacity ratio of magnesium is small, and the heating and cooling speed is very fast. In the actual bronzing process, the etched magnesium plate can quickly transfer the heat through conduction within a limited time, making the bronzing effect better and brighter; In addition, after a bronzing is completed, the heat of the etching magnesium plate is conducted in a large amount, the temperature will drop significantly, and the slightly expanded volume will shrink, so that there will be no obvious expansion and deformation; after the copper plate is heated, the heat dissipation is slow. , The volume expansion is larger, and the edge is softened, which is a significant advantage of the magnesium plate compared with the copper plate. The linear thermal expansion rate of the etched magnesium plate is 26, the copper plate is 17.5, and the zinc plate is 36.

The Brinell hardness value of the etched magnesium plate (the material of AZ31b) is 110, the brass plate (H59) is 95, and the zinc plate is 49. The surface hardness of the magnesium plate is twice that of the zinc plate, and is significantly higher than that of the brass plate. If it is a corroded magnesium plate made of AZ80, its surface Brinell hardness value reaches 140.

The etched magnesium plate adopts a magnesium alloy plate that is fully purified and completely crushed to a particle size of 5 microns (99%), and the internal composition of the material is uniform, stable and defect-free. In the nitric acid solution, the magnesium plate can be corroded uniformly and at a uniform speed.