The temperature rise of the injection molding machine is too high five hazards: the mechanical thermal deformation, the viscosity of the oil is reduced, the rubber seal is deformed, the oil oxidation is accelerated, and the component pressure of the air is also reduced.

One of the hazards: the mechanical thermal deformation

hydraulic components in the thermal expansion coefficient of different parts because of its small and stuck, causing action failure, affecting the transmission accuracy of the hydraulic system, resulting in poor working quality of parts.

Harm two: The viscosity of the oil is reduced

The temperature rise of the injection molding machine is too high will lead to the viscosity of the oil is reduced, the leakage is increased, the volumetric efficiency of the pump and the efficiency of the entire system will be significantly reduced. Due to the reduction of the viscosity of the oil, the oil film of the moving parts such as the slide valve becomes thinner and is cut, and the friction resistance increases, resulting in increased wear.

Harm three: The rubber seal deformation

Injection molding machine temperature rise too high will make the rubber seal deformation, accelerate the aging failure, reduce the sealing performance and service life, resulting in leakage.

Harm four: accelerate oil oxidation and deterioration

Injection molding machine temperature rise too high will accelerate oil oxidation and deterioration, precipitate asphalt substances, reduce the service life of hydraulic oil. The precipitates block the damping holes and slot valve ports, resulting in the pressure valve stuck and unable to operate, the metal pipeline elongation and bending, and even rupture.

Harm five: leading to the deterioration of the working quality of the components

The temperature rise of the injection molding machine is too high, which will lead to the deterioration of the working quality of the components, the escape of dissolved air in the oil, resulting in air pockets, which will reduce the working performance of the hydraulic system. The ideal working temperature of the hydraulic system should be between 45 degrees and 50 degrees, the reason is that the hydraulic system is designed according to a selected pressure oil viscosity, but the viscosity will change with the oil temperature, and then affect the working components in the system, such as the cylinder, hydraulic valve, etc., so that the control accuracy and response sensitivity are reduced, especially for the precision injection machine.

At the same time, the temperature is too high will also accelerate the aging of the seal to harden, fragmentation; The temperature is too low, the processing energy consumption is large, so that the running speed is reduced. Therefore, it is necessary to pay close attention to the working temperature of hydraulic oil. The reasons for the high oil temperature are various, but most of them are attributed to the failure of the oil circuit or the failure of the cooling system.

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