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 1. Mold manufacturing A mold with a correct and reasonable structure is a prerequisite for the smooth progress of machine production, and it plays an important role in ensuring the quality of die and castings (the pass rate of the machine).The correct selection of various process parameters is the decisive factor for obtaining high-quality castings, and the mold is the prerequisite for the correct selection and adjustment of various process parameters. The mold design is essentially a comprehensive reflection of the various factors that may appear in the production of the product.When designing the mold, it is necessary to analyze the structure of the die and castings, be familiar with the operation process of the machine, understand the possibility of adjusting the machine and process parameters, master the filling characteristics under different conditions, and consider the method of mold processing, Only after drilling and fixing the form can we design a mold that is practical and meets the production requirements.Of course, the mold pattern can be finely carved according to different designs.2. Die-casting process Die-casting is abbreviated as die-casting. It is a casting method in which molten alloy liquid is poured into a press chamber, the cavity of a steel mold is filled at high speed, and the alloy liquid is solidified under pressure to form a casting.The main characteristics of die casting that distinguish it from other casting methods are high pressure and high speed.The molten metal fills the cavity under pressure, and crystallizes and solidifies under higher pressure. The common pressure is 15-100MPa.The molten metal fills the cavity at a high speed, usually 10-50 meters per second, and some can exceed 80 meters per second (the linear velocity of the cavity through the inner gate—the inner gate speed), so the molten metal is filled The molding time is extremely short, and the cavity can be filled in about 0.01-0.2 seconds (depending on the size of the casting).3. Stamping process The stamping process can be roughly divided into two categories: separation process and forming process (also divided into bending, drawing, and forming).The separation process is to separate the stamping part and the blank along a certain contour line during the stamping process, and the quality of the separated section of the stamping part must meet certain requirements; the forming process is to make the stamping blank undergo plastic deformation without damage. And transformed into the required finished shape, but also should meet the requirements of dimensional tolerances.According to the temperature during stamping, there are two methods: cold stamping and hot stamping.This depends on the material's strength, plasticity, thickness, degree of deformation and equipment capabilities, etc. At the same time, the original heat treatment state and final use conditions of the material should be considered.Through the pressure of the machine, the upper and lower molds squeeze the sheet between the molds to reach a certain pressure, and the mold pattern is deeply printed on the sheet.Fourth, the type of corrosion process metal is different, and the etching process is also different, but the general process is as follows: preparation before the process (drawing design; film output; material preparation) → screen printing → drying → developing → washing → removing Ink → chemical etching (etching pattern text) → stripping → surface treatment.1.Pre-etching The steps before the metal etching are all pre-treatments. It is a key step to ensure good adhesion between the screen printing ink and the metal surface. Therefore, the oil stains and oxide films on the metal etched surface must be completely removed.2.Screen printing should produce standard pattern screen printing screen according to printing needs.In the pattern decoration process, the silk screen is mainly used for protection, and the photosensitive glue should be applied more often in order to make a thicker silk screen template, so that the covering performance is good, and the etched pattern has high definition.Under the action of light, the glue film of the screen plate produces a photochemical reaction, so that the illuminated part is cross-linked into a water-insoluble glue film, and the non-illuminated part is dissolved by water to expose the screen space, so that the coated silk The screen pattern is lithographically engraved on the screen to conform to the pattern of the black and white positive film.Fix the screen printing screen with pattern on the screen printing machine, and use alkali-soluble acid-resistant ink to print the required pattern on the metal plate, which can be etched after drying.3. Etching is the key to the pattern decoration process of the metal plate mold. To obtain a pattern product with clear stripes and strong decorativeness, attention must be paid to controlling the conditions of the etching process.The etching solution is generally a strong acid solution.4. The screen printing ink must be removed after etching.The general acid-resistant ink is easily soluble in alkali.Immerse the etching board in a 40-60g/L sodium hydroxide solution at a temperature of 50-80℃, and immerse for a few minutes to remove the ink.Five, the use of electroplating 1. Improve the corrosion resistance of metal products or parts.2. Improve the protective-decorative performance of metal products, which can be electroplated in many different colors. 3. Electroplating can also give certain products or parts a certain special function.During electroplating, the plated metal or other insoluble materials are used as the anode, and the metal product to be plated is used as the cathode. The cations of the plated metal are reduced on the metal surface to form a coating.In order to eliminate the interference of other cations and make the coating uniform and firm, it is necessary to use a solution containing the coating metal cations as the electroplating solution to keep the concentration of the coating metal cations unchanged.The purpose of electroplating is to plate a metal coating on the substrate to change the surface properties or size of the substrate. Electroplating can enhance the corrosion resistance of the metal (the coating metal is mostly corrosion-resistant metal), increase the hardness, prevent abrasion, and improve the conductivity. Lubricity, heat resistance, and beautiful surface.The electroplating surface is complete, meticulous, uniform, with consistent hue and gloss.