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Why should the plastic granulator control the working temperature of the screw

by:TENGDA     2023-01-02
The purpose of controlling the working temperature of the plastic granulator is to prevent the temperature of the feeding section of the screw from being too high, and the material will stick to the thread groove due to high temperature, which will affect the forward movement of the conveying machine, and cause the extruder to fail to operate normally due to insufficient material supply. At the homogenization section of the screw, the temperature rises due to excessive heat generated by the extrusion, shearing and friction of the material here, and the temperature control is carried out to prevent the melt here from decomposing. The temperature control of the screw is to drill a hole in the center of the screw shaft, all the way to the homogenization section, and then pass in water or oil as a heat transfer medium. In order to ensure the stability of the screw temperature, the heat transfer medium passing into the screw should be controlled at a constant temperature.
In the process of using the waste plastic granulator, the machine may have various problems, among which the temperature is too high is a relatively common problem, this article is intended to help you find out the general reason:
Common reasons: 1. The volume of the fuel tank is too small, the heat dissipation area is not enough, and the capacity of the cooling device is too small. 2. In the quantitative pump oil supply system that selects the oil pump capacity according to the fast forward speed, most of the excess flow will overflow from the relief valve under high pressure and generate heat during operation. 3. The unloading circuit of the plastic granulator is faulty or because the unloading circuit is not set, the oil pump cannot be unloaded when it stops working, and the entire flow of the pump overflows under high pressure, resulting in overflow loss and heat, resulting in temperature rise. 4. The fit gap of the fittings is too small, or the gap is too large after use and wear, resulting in large internal and external leakage, resulting in a large volume loss, such as a decrease in the volumetric efficiency of the pump and a rapid temperature rise. 5. The climate and operating environment temperature is high, resulting in an increase in oil temperature. 6. The viscosity of the oil is not selected properly. The viscosity is high and the viscous resistance is large. If the viscosity is too small, the leakage will increase. Both situations can cause heat and temperature rise.

Nanjing Tengda Machinery Co., Ltd. also discusses implications for both research and the practice of operations in building systems to help people succeed in both the short and long run.
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