What are the five major hazards of high temperature rise of injection molding machine?

Five major hazards of high temperature rise of injection molding machine: thermal deformation of machinery, reduction of oil viscosity, deformation of rubber seals, acceleration of oil oxidation and deterioration, and reduction of air component pressure.
1、 Cause mechanical thermal deformation
The moving parts with different thermal expansion coefficients in the hydraulic components are stuck due to their smaller cooperation with the trainees, resulting in action failure, affecting the transmission accuracy of the hydraulic system, and leading to poor working quality of the parts.
2、 Reduce the viscosity of oil
The high temperature rise of the injection molding machine will cause the viscosity of the oil to decrease, the leakage to increase, and the volumetric efficiency of the pump and the efficiency of the whole system will be significantly reduced. As the viscosity of oil decreases, the oil film of moving parts such as slide valves becomes thinner and cut, and the friction resistance increases, resulting in increased wear.
3、 Distortion of rubber seal
Excessive temperature rise of injection molding machine will deform rubber seals, accelerate aging and failure, reduce sealing performance and service life, and cause leakage.
4、 Accelerate oxidation and deterioration of oil
Too high temperature rise of the injection molding machine will accelerate the oxidation and deterioration of the oil, precipitate asphalt substances, and reduce the service life of the hydraulic oil. The precipitate blocks the damping orifice and the slit valve port, causing the pressure valve to be stuck and unable to move, the metal pipeline to stretch and bend, and even to break.
5、 Resulting in poor working quality of components
Excessive temperature rise of injection molding machine will lead to poor working quality of parts, and the dissolved air in the oil will escape, resulting in cavitation, which will reduce the working performance of the hydraulic system.
The ideal working temperature of the hydraulic system should be between 45 ° C and 50 ° C. The reason is that the hydraulic system is designed according to the viscosity of a selected pressure oil, but the viscosity will change with the oil temperature, which will affect the working elements in the system, such as oil cylinder and hydraulic valve, and reduce the control accuracy and response sensitivity, especially for precision injection machines.
At the same time, too high temperature will also accelerate the aging of the seal and make it harden and crack; If the temperature is too low, the processing energy consumption will be large and the operating speed will be reduced. Therefore, it is necessary to pay close attention to the working temperature of hydraulic oil. There are various reasons for high oil temperature, but most of them are due to oil circuit failure or cooling system failure.