Inspection before startup of vacuum hot press

2021-09-18 14:38

The vacuum hot press needs to be checked before it is officially started and the actual operation. Because of the universality of the hot press, in the daily actual operation process, it is very easy to ignore the relevant rules of the hot press operation, which has a serious impact on the subsequent normal operation and use of the hot press, and also brings great safety risks to the field work. Therefore, first of all, before the operation of the hot press, the relevant operators should confirm the pressure and temperature of the hot press when working according to the relevant process standards and process requirements, and ensure the continuity of the pressure and temperature. Secondly, before the official start, all parts of the hot press, as well as the surface of the steel strip and the metal structure, need to be cleaned, and no other impurities can exist. Finally, the pressure and temperature related to the operation and the transmission part of the lower level during normal use are carefully checked.

Specific items to be checked before starting the vacuum hot press: whether the pressure of heat transfer oil can meet the process requirements and keep the supply; The upper and lower surfaces of the tray are clean and the upper surface of the hot pressing plate is clean. The pressure of the accumulator is normal and the oil level of the oil tank is normal. All transmission parts are well lubricated, operating normally and electrical equipment is normal. There is no air in the oil cylinder and the sealing ring is well sealed.

Preparation before starting the vacuum hot press: close the main power switch and start the low pressure pump to make the accumulator reach the required working pressure; Open the heat transfer oil valve, close the heat transfer oil bypass circulation valve, and heat the hot pressure plate to reach the process temperature; Start each conveyor of the backing plate circulation system; According to the process requirements, adjust the time of each time controller and the position of the upper and lower limit pointer of the pressure gauge (if the total pressure changes greatly, the pressure adjustment mechanism of unloading valve and safety valve should also be adjusted);

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