What is the reason for the temperature rise of the hydraulic system of the hot press?

What is the reason for the temperature rise of the hydraulic system of the hot press?
(1) Unreasonable design of the hydraulic system of the automatic hot-pressing machine leads to system temperature rise
There is a large amount of pressure loss in the hydraulic system of the automatic hot-press molding machine, resulting in high hydraulic oil temperature. The servo hot press has various working modes such as single working platform, rotary working platform, left and right mobile platform. The carbon fiber hot-press molding machine is pressurized on the basis of negative pressure and equipped with special glue. For the processing of PVC series, the line shape and adhesion force of the hot-press are unmatched by negative pressure equipment. The hot press is a kind of electrical and mechanical connection device that heats two parts coated with flux tin in advance to a temperature sufficient to melt and flow the solder. After curing, an electrical and mechanical connection device is formed between the parts and the solder. For example, unreasonable specifications of hydraulic components, redundant components in Z system, improper throttling method of F circuit and no effective unloading measures will cause a large amount of pressure oil loss and oil heating. Therefore, the above unreasonable design should be improved and perfected. (z) Pressure loss converts pressure energy into heat energy.
The design and installation of the pipeline system is unreasonable, the pressure loss of the full-automatic hot-press molding machine increases, and the pipeline maintenance and cleaning are not found in time. Student management should be improved during commissioning and maintenance.
(3) Large volume loss leads to oil heating.
The leakage between the hydraulic pump, joint and telescopic hot press and the internal and external clearance shall be stopped and the volume loss shall be reduced. (High mechanical loss causes oil heating
Mechanical loss is often caused by poor machining accuracy and assembly quality of hydraulic components, poor installation accuracy and improper installation of seals. In particular, the tightness adjustment of the seal should be reasonable, so that the sealing performance of the meter-gauge device is good. It is mainly to improve the sealing structure, adjust according to the specified compression amount, and reduce the friction resistance 
（5） Caused by excessive pressure regulation
The hot press cannot work under harsh working conditions. The increase of system pressure will increase energy loss and increase oil temperature to ensure normal operation.
(The fuel tank is small and the heat dissipation condition is poor.
The heat dissipation conditions should be improved, the tank volume should be appropriately increased, and the heat dissipation effect of the tank wall should be brought into play. If necessary, forced cooling measures shall be taken.