Due to the development of new technologies and aluminum stencils, especially for the design of injection molds, aluminum dies are increasingly used in blow molding, RIM, rubber, structural foam and RTM molds. Although it may not be suitable for all application areas, in fact, its use is becoming more and more common. Everyone wants to extend the life of the mold, such as using traditional tool steel to make molds with hard chrome or nickel metal plating , or more specialized engineering coatings to prevent surface wear or Corrosion, which promotes better demolding. Since then, in order to find the same goal, we have started to use aluminum molds and found practical solutions.
In order to be able to injection molding to produce better decorative parts, in addition to extending 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 an electroless nickel spray process because This method helps to extend the life of the mold surface finish, making it relatively easy to produce decorative parts.
Since the texture of the aluminum material is soft, if the surface coating is not used, it is easily worn by the plastic to accelerate the damage, thereby changing the gloss of the injection molded part. Non-electrical nickel mold surface coating can increase 50RC, sufficient to protect and extend the gloss and surface structure of the die. Non-electroplated nickel coatings can achieve better surface finish quality than aluminum itself, but it must be noted that some surface treatment is required before the mold can be plated. For example, in order to achieve the lens-level quality level, it is recommended to first machine the surface of the aluminum mold to the SPIA-3 level of finish, and then apply a high-phosphorus electroless nickel coating of 0.0003 to 0.0005 before further polishing. To achieve a diamond-quality finish level.