How many injection molding machine opening failures have you encountered?

1. The injection molding machine can't open the mold again, there is pressure, there is speed, there is oil to the cylinder, the pressure is 120kg, why can't the mold always open
1 Is the oil seal of the mold opening and locking cylinder damaged
2 Is the mechanical part of the locking mechanism blocked
3 Check the mold opening valve; Check whether the valve core is not in place
4 Are the speed, pressure and position parameters appropriate?
5. Check whether the mold opening position has arrived. Look at the picture and check the electronic ruler or the mold opening stop travel switch
6. If this problem often occurs, check the oil circuit first, but the mechanical part should be more important to see if there is wear or instability of the connecting rod
2. It is normal when the mold is opened manually. But in the semi-automatic/full-automatic mode, when the mold is opened to the set position, it will stop for a while without stopping, and then display the slow speed. Quickly set the P and F values, so that the mold opening can not be produced beyond the range
Preliminary exclusion:
① P and F are set too large; There is also no problem of mold opening inertia
② The electronic ruler has been replaced
③ The program detection is normal.
1 The back pressure of mold opening is not set or the oil circuit related to it is faulty.
2. The setting of fast and slow position conversion point of mold opening is unreasonable
3. Inspection of mold opening solenoid valve core
4. Check whether the movement of the valve core is linear
5 Does the computer output signal stop lagging
6. The opening pressure and flow setting are too large
3. There is a Haitian 240 aircraft, which has been in service for less than ten years. More than a year ago, it was replaced with a full set of machine hinges because it often did not open the mold. In July this year, the machine could not open after locking the mold, and it needs to be knocked by manpower. In August, we replaced the whole set of machine hinge steel sleeves, but it did not completely solve the problem. The old problem often recurred
1. When the mold is locked to the low pressure protection position, the two cross guide rods have the sign of being lifted up, and there is the sign of being pressed down when the mold is opened. The reason why the mold cannot be opened is that the cross cannot pass the ※ point, so a knock is equal to adding a little external force to open the mold;
2. Measures taken: In addition to replacing the machine hinge steel sleeve, the cross copper sleeve was replaced, and the balance was adjusted after the doubt that the Corinthian column was unbalanced, but the fault remained!
1 crosshead and 2 guide rods replaced! Suspected variant
2. The foot pad of a moving plate can be adjusted, and the moving plate can be raised a little. The machine has been used for too long, and wear causes the moving plate to sink.
3. It was confirmed that the failure was caused by the inconsistency of the upper and lower cranks due to the assembly error caused by the failure of each process during the first removal and replacement of the hinge steel sleeve. It should be listed as the company's obsolete machine.
4. Do not lock the mold under high pressure during shutdown.
4. This has happened four times in a plastic machine. It was used to increase the system pressure and flow; Knock the arm with a hammer; Jack it up and open it with the back of the crane. This time, all the above methods can't be opened, and the four guide stud nuts can't be loosened. Please ask me how else to open this machine
1. Loosen the nut connecting the piston rod of the mold locking cylinder and the cross by about 1cm, and then open the mold. It should be opened by 70% using its inertia
2 Set the slow mold opening position to 0, and set the fast mold opening pressure and speed to the maximum
3 Check the crank arm for wear (replacement)
4. The guide rods on both sides of the mold locking cross are loose. It can be opened at one time. In addition, the spacing between the four pillars should be adjusted, or it will not be opened
5 First of all, it is necessary to distinguish between the circuit problem and the oil circuit problem. When the mold is not opened, check whether 24V power is connected to the solenoid valve and whether the system is under pressure.
6 There is also the problem of electronic ruler. Check whether the figure of the electronic ruler is correct when the mold is not opened.
7 Use a jack to place it between the cross of the crank arm and the ejector cylinder. After the jack is tightened, slightly use the mold opening force of the machine table
8. Lock the set screws evenly around the mold (ensure more than 8 symmetrical screws). After confirming the mold installation again, adjust the mold opening buffer, lower the mold opening speed, and then increase the mold opening pressure in turn
5. When the front safety door is opened during semi-automatic operation, the mold opens automatically. What's wrong?
1. The program setting stipulates that the safety door (imported equipment) cannot be opened before the injection action is performed during semi-automatic operation
2 Check the travel switch of safety door
3 Check whether I/O inspection is terminated during mold closing
4. Program error (domestic normal)
6. After the mold is opened to the end, it will bounce back about 20mm. What's the matter?
1. The setting of mold opening stroke is unreasonable, the buffer speed pressure is too large, and the position is too small
2. This phenomenon also occurs when there is air in the mold opening cylinder
3. It should crawl slowly for 20 mm when ejecting. If so, check the closing valve.
4. First check the center position of the reversing valve and the oil cylinder seals, as well as the pressure slope
5. Adjust the opening and closing of the opening and closing die reversing valve through the countersunk screw. The internal guide oil of the small Confucius (X, Y) can be relieved
6 It is also possible that the fuel tank air filter element is blocked and the exhaust is not smooth!
7. Open the internal leakage of the locking cylinder. Check the internal leakage of the piston sealing ring and the thread between the piston and the piston rod.
7. The injection molding machine just finished the injection and suddenly cut off the power. After 4 hours, the machine was started and found that the mold could not be opened. What should I do?
1 Check whether there is something burning in the mold opening circuit (without output)
2. It's about the mold. Because the power supply is too long and there are products in it, it suddenly rises
3. It may be that the solenoid valve of the mold switch is stuck. Try to increase the pressure of the mold opening
4. Open the mold after adjusting the PQ, and then restore
5 If not, the formwork will have to be jacked off.
8. The mold will open slowly when the 150T injection table acts or the glue injection acts, and the reversing valve of the opening and closing mold has been changed several times, which can not solve the problem
1 Have you checked the hydraulic control valve under the switch mode valve and whether one spring on both sides is broken
2 The mold locking is too tight, adjust it again (semi-automatic)
3 Check the internal leakage of the oil seal of the mold locking cylinder (semi-automatic)
4. The die locking final stroke switch is pressed too far (semi-automatic)
9. After a restart of the normal production machine, a strange inertia suddenly appeared. Press the mold opening button in the manual mode, and then release it immediately. The mold will move along the original route for a distance even if it does not stop. This phenomenon occurs when the mold is closed and the ejector seat. I don't know why
1. There is a problem with the hydraulic oil and sediment. After the machine is shut down for a period of time, these sediment will accumulate in the oil system, which will block the movement of the valve core and slow the recovery, or the electric valve coil will generate magnetic multiplication.
2. Because the hydraulic oil is dirty, the valve element of each action valve has problems in returning. Wash the oil tank and replace the hydraulic oil
10. There is a small injection molding machine, and the failure is as follows: when the mold is locked and the front and rear injection tables are opened, the pressure gauge displays to 140 (the mold locking high pressure rod is not pushed to the end switch), but there is no pressure for mold opening, and the mold opening and locking oil pressure will be displayed at once when the mold is opened, but the mold cannot be opened
1 Is the mold opening valve stuck
2. Is there no resistance pressure at the locking pressure?
3 Check the opening and closing oil cylinder, and adjust the two oil pipes to confirm whether there is internal leakage.
4 The oil seal in the opening and closing die cylinder is damaged.