Features: 1. High capacity, Low energy consumption. 2. Each gear in the hard gearbox has been heat-treated and fine-grained with a forced cooling system to ensure high efficiency, low noise and long service life. 3. Screw has different data, suitable design, for the different raw material to make different products, screw has different L/C and structure, to meet different customer requirement. 4. Barrel has two types, one is Open trench, the other is smooth, to meet different raw material. 5. Screws and barrels are made of high-performance alloy steel, which is resistant to wear, corrosion, and high strength. 6. The whole machine is compact and reasonable in design, convenient in operation and easy to maintain.