Multi-color injection molding is a molding method in which two or more injection units are used to inject different colors or different types of plastic into the mold at the same time or in succession. The biggest difference between multi-color injection molding machines and ordinary injection molding machines is injection. Design of fixtures and events templates. At present, there are mainly two-color injection molding machines and mixed-color injection molding machines.

1. Double clear injection molding machine.

The double-color injection molding machine is composed of two injection devices, a common mold clamping device and a two-color mold, which can produce plastic products with obvious color separation on the inner and outer layers.

2. Mixed color injection molding machine.

The injection device of the color-mixing injection molding machine is composed of two injection barrels and a common nozzle. The sequence of the molten material entering the mold and the ratio of the injection plastic can be adjusted by a hydraulic system, and a color-mixed product with a natural transition color can be obtained . The mixing ratio in the nozzle is controlled by the injection stroke, injection speed, and injection time difference.