What is the appropriate temperature of the hydraulic oil of the injection molding machine?

Update:24-09-2021
Summary:

The ideal working temperature of the hydraulic system s […]

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, which will affect the work of the system. Components, such as oil cylinders, hydraulic valves, etc., reduce control accuracy and response sensitivity, especially for precision injection machines.

At the same time, if the temperature is too high, it will accelerate the aging of the seal and cause it to harden and crack; if the temperature is too low, the processing energy will be consumed and the operating speed will be reduced. Therefore, it is necessary to pay close attention to the working temperature of hydraulic oil. There are many reasons for the high oil temperature, but most of them are due to the failure of the oil circuit or the failure of the cooling system.

Insufficient oil will cause the oil temperature to rise easily, and the air will easily dissolve into the oil, which will affect the oil quality and the normal operation of the hydraulic system. Insufficient oil is usually caused by oil leakage or loss during repairs. For this reason, you should pay attention to check whether there is any leakage. If necessary, replace worn seals and tighten loose joints as soon as possible. After maintenance, check the amount of oil in the fuel tank and replenish it in time.

One of the important properties of hydraulic oil is its chemical stability, that is, oxidation stability. Oxidation is the most important factor that determines the effective service life of hydraulic oil. The insoluble matter such as wood tar, sludge and carbon residue generated by oxidation will contaminate the hydraulic system, increase the wear of hydraulic components, reduce various gaps, block small holes, and eventually cause The hydraulic system is malfunctioning. The oxidation rate of hydraulic oil depends on many factors such as itself and working conditions, among which temperature is one of the main factors. Therefore, it is necessary to use suitable hydraulic oil and regularly check the oxidation degree of the hydraulic oil (judged from the darker color of the oil itself) ), it is absolutely necessary to actively change the oil after a certain number of working hours.

During the use of the injection molding machine, always check the pressure oil level, the pressure of the oil pump and the cleanliness of the pressure oil. When encountering wet weather, the concentration of the pressure oil must be checked daily, and the water pipes must be checked frequently to prevent water from being mixed in. In the pressure oil, the oil filter is blocked. Check the fuel tank frequently to keep it clean to prevent debris from falling in. Replenish pressure oil on time.

For the lubrication of the moving parts, the travel switch, the tightening of the screws, and whether the oil hoses and joints are leaking, they should be routinely checked once a week to keep them in good condition. If they are loose, they should be replaced or tightened.

In addition, if a pressure oil is used for too long or too long, the pressure oil can be replaced, so as to extend the life of the oil switch, oil pump and sealing ring.
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