The difference between twin-screw extruder and single-screw extruder

Experts from the twin-screw extruder service provider Nanjing Jie Ente Electromechanical Co., Ltd. said that the two conical screws are horizontally arranged, and the two axes are placed in the barrel at an angle. The center distance of the two axes gradually increases from the small end to the big end. The transmission gearbox has a large center distance between the two output shafts. The gears and gear shafts in these transmission systems and the radial bearings and thrust bearings supporting these gear shafts have a large installation space, which can be equipped with larger specifications. Radial and thrust bearings, each of which has a shaft diameter sufficient to meet the transmission torque, so the large working torque and large load capacity are a major feature of the conical twin-screw extruder. This parallel twin-screw extruder is unmatched.
Experts from the twin-screw service provider Nanjing Jieente Electromechanical Co., Ltd. said that when the twin-screw extruder is working, the melt will generate a very large pressure (head pressure) at the head of the screw. The pressure is usually around 14MPA, sometimes even as high. Above 30MPA, this pressure creates a strong axial thrust on the screw, and the thrust is the function of the thrust bearing.
Twin screw extruder features:

1. According to the relative position of the two axes, there are parallel and conical points;

2. According to the two screw engagement procedures, there are meshing type and non-engaging type;

3. According to the rotation direction of the two screws, there are the same direction and the opposite direction, and there are inward and outward divisions in the opposite direction; 4. According to the screw rotation speed, there are high speed and low speed points;

Nanjing Jie Ente Co., Ltd. experts said that the characteristics of single screw extruder:

1. The material conveying of the single-screw extruder is mainly based on friction, which limits the feeding performance of the single-screw extruder. It is difficult to add powder, paste, glass fiber and inorganic filler.

2. The surface renewal effect of the single-screw extruder exhaust extruder material in the exhaust zone is small, so the exhaust effect of the single-screw extruder is poor.

3. Single-screw extruders are not suitable for certain processes, such as polymer coloring, processing of thermosetting powders, etc.