Temperature control method of casting molding machine

Temperature control method of casting molding machine
1. Air cooler temperature control
For example, in the resin sand production line used by the company to cooperate with the casting molding machine, 9 hydraulic units all adopt this hydraulic oil cooling method, which is divided into two cooling methods. On the oil return line, it is used to cool the hydraulic oil with a higher temperature after circulating in the system, and the outlet of the cooler is connected to the oil tank; the other is independent of the hydraulic system of the main machine of the molding machine, a separate set of cooling circulation lines, installed next to the hydraulic station of the main machine , The gear pump is mostly used as the circulating pump, and the surrounding air flows through the air cooler fan, and the heat of the oil in the heat sink in the cooler is taken away to achieve the purpose of cooling the oil. This oil cooling method has its own advantages and disadvantages. The advantages are simple structure, small footprint, convenient maintenance and low cost. Therefore, 80% of hydraulic systems now use this cooling method. The disadvantage is that it is affected by the on-site operating environment and The influence of indoor temperature is more serious, and the cooling effect is not good, especially in summer, the site environment temperature is high, the temperature difference between the oil in the cooler pipeline and the surrounding air is small, the heat exchange effect is not good, the cooling efficiency is greatly reduced, and it is also affected by the operating environment. Influence, the large amount of dust on site will cause a layer of dust to hang on the cooling fins of the cooler, which hinders the heat exchange between the oil and the environment, so the cooling effect is significantly reduced.
2. Water cooler temperature control
The water cooler cools the hydraulic system, and some domestic enterprises are still using it. It needs to install a set of water cooling circulation system, equipped with a water cooler (oil-water heat exchange device), pipeline pump, a large water tank and corresponding connecting pipelines. Under normal working conditions, the effect of the water cooler is relatively good, but it has many disadvantages, such as not only high one-time investment cost, but also maintenance work such as descaling, water drainage in winter, and pipeline rust prevention every year, which increases invisibly. maintenance workload. At the same time, in order to save water, the cooling water can only be circulated and dissipated through the water tank to complete the cooling effect. When the room temperature is high in summer and the water in the water tank is similar to the ambient temperature of the air, the high water temperature will greatly weaken the effect of the water cooler. , and changing the water will cause waste of water resources, which is very uneconomical. At present, this cooling method is rarely used in China. Many companies have responded to the call to save water and reduce water waste, and it has been explicitly prohibited to use this cooling method. Way.