In order to make hydraulic oil have good chemical stability, it is generally desirable to keep it below a few degrees.
At the same time, too high temperature will accelerate the aging of the seal, making it hard and broken; If the temperature is too low, the processing energy consumption will be high, which will reduce the running speed. 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 attributed to the failure of oil circuit or cooling system.
Insufficient oil will cause the oil temperature to rise easily, and air will easily dissolve into the oil, which will affect the oil quality and the normal work of the hydraulic system. Insufficient oil is usually due to oil leakage or loss during repair. Therefore, attention should be paid to check whether there is any leakage, replace worn seals as soon as possible, and tighten loose joints. 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 to determine the effective service life of hydraulic oil. Insoluble substances such as wood tar, oil sludge and carbon residue produced by oxidation will pollute the hydraulic system, increase the wear of hydraulic components, reduce various gaps and block small holes, which will eventually lead to the failure of the hydraulic system. The oxidation speed 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 absolutely necessary to use suitable hydraulic oil and regularly check the oxidation degree of hydraulic oil (judging from the darker color of the oil itself), and actively change the oil after a certain number of working hours.
During the use of injection molding machine, the level of pressure oil, the pressure of oil pump and the cleanliness of pressure oil should be checked frequently. In case of wet weather, the concentration of pressure oil must be checked every day, and at the same time, the water pipe should be checked frequently to avoid water mixing with pressure oil and blocking the oil filter. Check the fuel tank frequently and keep it clean to prevent sundries from falling into it. Replenish pressure oil on time.
Lubrication of all moving parts, fastening of all travel switches and screws, oil leakage of all oil throats and joints, etc. , should be checked once a week, keep it in good condition, if it is loose, it should be replaced or tightened.
In addition, if the pressure oil is used for too long, it can be replaced to prolong the life of the oil stopper, oil pump and sealing ring.