stamping

Stamping is a forming process in which an external force is applied to a sheet or the like by a press and a mold to obtain a stamped part of a desired shape. According to statistics, 60-70% of the world's steel is sheet, and most of the sheet is processed by stamping. Therefore, stamping has an innate advantage!

The stamping process has high production efficiency, short production cycle and large processing size, so more mobile phone back cover (lower end) adopts stamping process. Why can't punching do small parts such as mobile phone trays? Because the precision of stamping does not meet the requirements of the mobile phone card tray (you can see that there is a height difference in the part of the Cato to see if it is convenient to place the SIM card. This kind of height difference is difficult to punch!)

https://www.no2-machinery.com/electronical-parts/electric-communication-parts/big-size-mim-parts.html

Machining

Machining refers to the process of changing the dimensions or properties of a workpiece through a mechanical device. Machining includes: car, milling, drilling, planing, grinding, shearing, etc. Machining does not require mold design and production, and has a large degree of freedom, and the machining accuracy is very high; but the machining yield is low, and it is difficult to machine a structure with complicated shape. Despite the low production efficiency, many high-priced, high-quality mobile phone metal middle/back cover adopts CNC milling method; on the one hand, people have not found a better method; on the other hand, the efficiency of die casting, forging and other processes High, but surface treatment such as anodizing is not as good as machining. In addition, machining is also suitable for secondary processing such as deburring, drilling, and surface treatment.

MIM

MIM is a beautiful and desolate love story. The kind plastic particles look like rough metal powder, and the high temperature is experienced. Finally, it fits well, but it is not too long. In order to perfect the metal, the fire is cultivated and turned into ashes~~~ ”