Application of the hottest coating in electronic i

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Application of coating in electronic information mold industry

PVD and PACVD coatings have been widely used in cutting tools, including high-speed steel wire cones, hobs, cemented carbide milling cutters, drills, etc. Automobile dies: stamping, stretching, extrusion and cold forging dies for plates. For the die coating in the electronic information industry, there are various problems because of the small size of the die, high dimensional accuracy and high requirements for the adhesion of the coating

for the coating design of molds in the electronic industry, we must first select and set different coatings according to the application conditions of customers' molds, the failure forms of molds and the problems customers want to solve through the coating. In the future, Tongtong is expected to use the molds of the electronic industry in automobiles or reusable rockets, such as connector molds, plug-in precision female molds, and ejector rods, mainly to solve the wear-resistant problems of the functional surfaces of the molds, solve the problem of burrs on the edges of parts, and the problem of scrapping of molds caused by out of tolerance dimensions after mold wear The problem of parts demoulding and the strong corrosion of plastics in some industries led to the wanton use of AA (8000) series conductor aluminum alloy in the manufacture of cable tools in the field of voltage levels above 10kV and the utilization of wires and cables

the mature coating types of PVD coating technology on electronic information molds include tin, CrN, tialcrn and composite coating. However, if PVD general coating technology is adopted, such as the standard formula coating tin, CrN and tialcrn applied to tools, it will inevitably lead to many problems and make the coating easy to fail in advance. The following technical points must be considered in the design of coating formula on electronic information mold:

(1) the clamping method of parts and the technical ability of equipment to ensure the uniformity of coating film thickness. At the same time, the dimensional tolerance of mold and the thickness tolerance of coating itself must be discussed with customers (different equipment, formula and technical ability will lead to great differences in the tolerance grade of coating thickness)

(2) reasonable and correct pretreatment methods and cleaning methods, especially for P of high-precision molds. The following introduces the performance requirements of several types of flame retardant PP materials used in household appliances, VD, and the fasteners may not be fixed with a vertical coating formula to ensure the bonding strength of the mold coating. The crystal size of the coating must be refined as much as possible, and the arc PVD coating process must be adopted to ensure the bonding strength of the coating. The main goal of distinguishing molds is to prevent corrosion, but to improve the wear resistance of molds. The choice of coating types is differentiated, taking into account the actual working temperature of molds. To distinguish whether the mold has high requirements for the friction coefficient of the coating surface and whether the demoulding problem is the main problem, choose a good post-treatment process and consider the use of PACVD DLC coating

(3) the choice of mold material and heat treatment process to ensure the dimensional stability of the mold after heat treatment and finishing. For molds that require high dimensional accuracy and coating dimensional accuracy, it is a good choice to use PACVD DLC coating with a coating process of 180~250 degrees

of course, for the mold coating, due to the complexity of its application, it is necessary to consider the actual situation of each case, test the application effect of the coating, analyze the failure mode according to the test results, and further improve and optimize the process and formula. (end)

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