In the application of low-pressure casting machine, some mechanical problems will occur, which affect the trouble-free operation of the low-pressure casting machine. You must test the fault immediately in order to repair the trouble-free operation of the bottom casting machine.
Common mechanical failures of low pressure casting machines include:
First, the hydraulic control system cannot rise.
For the mechanical failure of the hydraulic control system of the low-pressure casting machine, first check whether the pressure controller is turned on correctly. If it is turned off, the main power switch must be turned on. Then check the oil motor, electrical equipment control circuit, and whether the thermal relay is activated. Check the low-pressure casting machine Structure, check the fastening of the pressure regulating plate inside the low-pressure casting machine, the damage of the radio frequency joint, the oil leakage of the steam pressure valve, etc. If the above abnormal conditions are found, corresponding preventive measures should be taken.
Second, the pump pressure rises too high.
If there is steam suction on the suction side of the hydraulic pump, please check the cause before overhauling. If the inlet filter screen is found to be clogged, it must be removed immediately. If the damage is serious, the relevant parts can be disassembled. Sometimes the noise of the hydraulic pump will increase after long-term use , for the following reasons:
1. Axial movement of hydraulic pump and motor;
2. Abnormal hydraulic pump speed;
3. Air pollution from working oil;
4. Reduce the amount of remaining oil during operation;
5. The gas stays in the sealing part of the pump shaft of the hydraulic pump.
In view of the high pressure rise of the hydraulic pump of the low-pressure casting machine, the hydraulic pump can be overhauled first, and then confirmed whether its revolution is normal.
Third, the main hydraulic cylinder does not work.
There are several important reasons for the failure of the low pressure casting main hydraulic cylinder.
1. The steam pressure valve of the low pressure casting machine does not work;
2. The attitude of the electro-hydraulic reversing valve of the automotive relay of the low-pressure casting machine is slow;
3. The power circuit control circuit and steam pressure control module fail.
First check the steam pressure valve to determine the location and cause of the mechanical failure caused by the steam pressure valve of the low-pressure casting machine, and then confirm whether the wiring of the control panel of the low-pressure casting machine is confused, falling off or damaged. Then choose the appropriate solution according to the correlation.
