Spraying paint on the surface of plastic products can ensure the brightness of the products, because plastic products are difficult to reflect light and appear very dark. If the surface of a plastic product has a texture, it will look darker. At this time, customers will spray a layer of paint on the surface of plastic products to pursue the beauty of the surface and ensure the brightness of the product. 
During each Injection Process, a pulse discharge will leave a small hole on the surface of the workpiece. The size of the pits and the amount of etched material are proportional to the pulse energy. In other words, the greater the pulse energy, the more heat transferred to the workpiece, and the more material removed. In theory, the speed of electrical discharge machining is proportional to the energy and frequency of a single pulse. However, in practice, the effect of a single pulse is not reflected separately, but rather the result of the action of multiple pulses. Due to the continuous nature of the pulse power supply, the process of transferring energy through the pulse state to the machining gap is very complex. The machining speed is a multiple function related to the pulse discharge time, pulse interval, pulse discharge current, pulse waveform, machining object performance, and electrode material and chip removal conditions.
Therefore, spraying paint on the surface of plastic products with requirements is very useful, but we need to know that painting can increase the cost of Injection Molding.
