State: 1. Add mental separator in the material mouth of the injection molding machine, extrusion machine, blow molding machine, ensure no mental into the molding machine. Protect the molding machine and improve the purity and quality of rubber products.

2. Join the hopper top of the mental separator, put the plastic particles into the hopper directly, the hopper control the speed of the plastic particles automation, detection automatic and separate all the mental（ like stainless steel, copper ,iron and aluminum）, ensure no mental in the plastic particles.

3. Docking with the granulation line, add to the particle cutting machine or packaging machine the material below the mouth and isolated detection by pollution metal materials.