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Twin Screw Extruder Shear Rate
- Sep 27, 2017 -

Twin Screw Extruder Shear rate

Performance advantages of twin screw extruder

 This conical twin-screw extruder has the characteristics of forced extrusion, high quality and wide range of applications. Its service life is relatively long and the shear rate is small, so it can ensure that the equipment can run smoothly. Twin-screw extruder mixing plasticity is also very good, and its powder can be directly formed, but also has the ability to control the temperature, a vacuum exhaust and other devices, to ensure a good use of the effect. In the process of work, the equipment friction generated by the heat is still relatively small, the material is more uniform shear, the screw conveyor capacity is also great, the extrusion is relatively stable, stay in the barrel for a long time, Material mix is very uniform.

Twin screw extruder is a very cost-effective equipment, skilled master machine performance, it can work in the process to play an advantage, the use of the equipment performance is very high.

When using a twin-screw extruder, be sure to know the location of the parts of the twin-screw extruder and the installation requirements above the instructions for the next machine installation. At the beginning of the construction, according to the overall location of the machine to determine the layout of the motor cable, and give priority to complete the installation of cable installation. Twin screw extruder in the installation of the host to ensure that the correct angle of the host, because the host of the machine for the normal work of the machine on the decisive role, so the host angle deviation must be minimal, the motor installation location also need to strictly follow the drawings The location of the installation, the location deviation can not be too large, the installation of twin-screw extruder in accordance with the requirements of the drawings to install, not free to change, only a detailed understanding to better use. Cone twin screw extruder screw diameter can be used in larger size. This is because the quality of the transport of the body by the screw diameter and the depth of the groove less affected, such as the maximum diameter of up to 300mm. Screw length is relatively small, generally not more than 22. Obviously this is due to the melt extrusion screw does not bear the solid transport and melting of the material. Screw structure does not necessarily use three-stage segmentation, such as the use of long-zone gradient full cone structure. Generally only need to install mixed components, only in special needs when the installation of cutting elements. In order to prevent the shear overheating, the screw degree may be lower. While the required drive power is also smaller. According to the principle of self-heating, if the high screw speed, the heating power must be very low. The main function of the barrel heater is to maintain the melt temperature. So it is desirable to have lower heating power. There is no cooling device in the general feed area. In order to prevent overheating, cold air system can be installed along the barrel. The temperature control system is simpler. Generally do not configure the hopper or silo, and the melt pipe directly into the melt.