The global watch industry has annual sales of 15 billion US dollars, and metal powder injection molding has been closely involved in the production of many new watches. Powder injection moulded bracelets, clasps and watch holders are produced worldwide.
At first, due to the saturation of this field and the reduction of manufacturing costs of traditional forging processes, the rapid growth rate of metal powder injection molding parts was once reduced in the traditional watch industry. However, with the popularity of smart wear and the complexity of watch structure, the application of powder injection molding in watch parts has grown rapidly. Figure 2 is a head tablet used on a smart wearable.
The reason why the metal powder injection molding technology can be successfully applied in the watch industry is that the process is suitable for mass production. The MIM process generally has a production cycle of 5-7 days, and can be continuously supplied after one cycle. The daily output varies from Hundreds to hundreds of thousands per day can be satisfied. At the same time, since MIM products are formed by a mold similar to an injection mold, a very high degree of freedom in geometric shape design can be obtained. As long as the products that can be formed by the injection mold can be basically produced by the MIM process. Since the D90 of MIM raw material powder is below 18um, the surface roughness of the sintered blank can be about Ra0.8, which brings convenience for subsequent grinding, polishing, electroplating and other processing. Therefore, metal powder injection molding can meet the harsh appearance requirements of watches and clocks.