Precautions for mold electroplating processing

Due to the development of new technology and aluminum template, especially for the design of injection molds, aluminum molds are more and more commonly used in blow molds, R.I.M. molds, rubber molds, structural foam molds, and R.T.M. molds. Although it may not be suitable for all application areas, in fact, its use is becoming more and more common. Everyone hopes to prolong the production life of the mold. For example, the mold is made of traditional tool steel, and the surface is electroplated with hard chromium or nickel metal, or more specialized engineering coatings are used. This can prevent the surface from being worn or worn. Corrosion promotes better demoulding. Since then, in order to seek the same goal, they began to use aluminum molds and found a practical solution. (Guide: Points to note when using stainless steel screws)

　　 In order to be able to produce better decorative parts by injection molding, in addition to prolonging the service life of the mold, the manufacturer also hopes that the surface of the aluminum mold can maintain a certain degree of gloss, so it is recommended to use non-plated nickel spray Process, because this method helps to extend the life of the mold surface finish, making it relatively easy to produce decorative parts.

　　Because the texture of aluminum is relatively soft, if surface coating is not used, it is easy to be worn by plastic, accelerate its damage, and change the gloss of injection molded parts. The electroless nickel coating can increase the mold surface by 50RC, which is sufficient to protect and extend the gloss and structure of the mold surface. The electroless nickel coating can obtain better surface finish quality than the aluminum itself, but it must be pointed out that before the mold can be electroplated, some surface treatment is first required. For example, in order to achieve the lens-level quality level, it is recommended to first process the surface of the aluminum mold to the SPIA-3 level finish level, and then apply a 0.0003~0.0005 high-phosphorus electroless nickel coating before further polishing. , To make it reach the level of diamond-quality finish.

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