How to solve the failure of the injection molding machine?

1 Is the unlocking mold cylinder oil seal damaged?

2 Is the mechanical part of the clamping mechanism stuck?

3 Check the mold opening valve; see if the spool is not in place.

4 Speed ​​and pressure, is the positional parameter appropriate?

5 Is the mold opening position already reached? Look at the screen to check the electronic ruler or open the mold stop switch.

6 If this problem occurs frequently, first check the oil circuit, but the mechanical part should be checked to see if there is any wear or instability of the connecting rod.

2. Normally when the mold is opened manually. However, when it is half/automatic, when the mold is opened to the set position, it will stop and not terminate, then the slow speed will be displayed again. The P and F values ​​set quickly will be opened. Overtravel cannot be produced.

Initial exclusion:

1P, F setting is too large; there is no problem of mold opening inertia.

2 electronic ruler has been replaced.

3 program detection is normal.

1 Open mold back pressure is not set or related to the oil line failure.

2 Open mode fast and slow position change point setting is unreasonable

3 open mold solenoid valve spool inspection

4 PQ valve check, whether the spool movement is linear

5 Does the computer output have a signal to stop lag?

6 mold opening pressure, flow setting too large

Third, there is a Haitian 240 machine, serving less than ten years. More than a year ago, because it often does not open the mold, it has changed a full set of hinges. In July this year, this machine can not be opened after locking the mold, it needs manpower Knocked on. In August, we changed the whole set of hinged steel sleeves, but did not completely solve the problem, or the old problems often recurred:

1. When the mold is locked to the low-pressure protection position, the two cross guides have signs of being lifted up. When the mold is opened, there are signs of being pressed down. The reason why the mold cannot be opened is that the cross cannot pass the ※ point, so one Knocking is equivalent to adding a little external force to open;

2. Measures that have been taken: In addition to changing the hinged steel sleeve, the cross copper sleeve has been changed. It is suspected that the Corinth column is unbalanced and the balance is adjusted, but the fault remains!

1 Crosshead 2 guides replaced! Suspected variant

2 You can adjust the foot of a moving board, and raise the moving board a little. The machine is used for too long, and the wear and the like lead to the sinking of the moving board.

3 Confirmation is due to the fact that each process is not restored in situ when the reaming steel sleeve is removed for the first time, and assembly errors occur, resulting in the inconsistency of the upper and lower crank arms. This should be listed as the company's elimination machine.

4 Do not clamp the mold at high pressure when shutting down.

Fourth, there is a plastic machine that has appeared 4 times. It used to increase the system pressure and flow rate; knock the arm with a hammer; use the jack top to open it with the back of the road. This time all the above methods have been used. I can't open it, and the four guide pillar nuts can't be loosened. Can you find any way to open this machine?

1 Loosen the nut connected to the piston rod of the clamping cylinder and the cross by about 1cm, then open the mold, and use its inertia to open 70%.

2 Set the slow mold opening position to 0, and the quick mold opening pressure and speed are set to the maximum.

3 Check the crank arm, there must be wear (change)

4 The guide rods on both sides of the mold-locking cross are loose. Just click on the other machine to adjust the spacing of the four-column or not open.

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 the 24V electricity is on the solenoid valve and whether the system has pressure.

6 There is also the problem of the electronic ruler. See if the digital ruler is correct when the mold is not open.

7 Put the jack between the cross of the crank arm and the top of the cylinder, so that it can be tightened slightly, then use the machine to open the mold force.

8 Lock the fixing screws around the mold, (guarante the symmetrical 8 screws or more). After confirming that the mold is installed correctly, adjust the mold opening buffer, lower the mold opening speed, and then increase the mold opening pressure in turn.

5. When the semi-automatic work is opened, the front safety door is opened, and the mold is automatically opened. I wonder if something went wrong?

1 Program setting stipulates that the semi-automatic work cannot open the safety door (imported equipment) before the injection action is performed.

2 Check the safety door travel switch!!

3 Check if the clamping is terminated or not.

4 program error (domestic normal)

Sixth, after the mold is opened to the end, it will bounce back around 20mm. What is going on?

1, the mold opening stroke setting is unreasonable, the buffering speed pressure is too large, the position is too small.

2, the mold cylinder has air will also have this phenomenon

3, should be slowly crawling 20mm when jacking out, if so check the mold valve.

4, first check the reversing valve neutral position and cylinder seals. There is also the slope of the pressure

5 Adjusting the opening and closing by means of countersunk screws, adjusting the inner guide oil small hole (X, Y) inside the reversing mode reversing valve can alleviate

6 It is also possible that the fuel tank air filter blockage is not smooth!

7 Open the mold cylinder for internal leakage. Check the piston seal and the thread leakage between the piston and the piston rod.

7. The injection molding machine has suddenly power-off after the injection. After 4 hours of calling, the machine is started. It is found that the mold can not be opened. What should I do?

1 Check if there is anything burning in the mold opening circuit (in case of no output)

2 is the thing of the mold, because the power outage is too long, plus the product inside, let it rise

3 It may be that the solenoid valve of the switch module is stuck. Try adding the pressure of the mold opening.

4 Open the module after adjusting the PQ. Then restore

5 If you can't, you have to use a jack to open the template.

Eight, 150T open the table action or the action of the glue, the mold will slowly open, and the reversing valve of the open and close mold has changed a few can not solve the problem

1 Have you checked the hydraulic control valve under the switch mode valve, whether there is a spring on both sides is broken.

2 The clamping mode is too tight and is adjusted again (semi-automatic)

3 Clamping cylinder oil seal leakage check (semi-automatic)

4 The final stage of the clamping is pressed too far (semi-automatic)

Nine, the normal production of the machine, after a reboot, suddenly a strange inertia. In the manual mode, press the mold, and then immediately release, the mold does not stop the action will also move a distance along the original route, Close mode, shooting has this phenomenon. I don't know what is going on.

1 There is a problem with the Hydraulic Oil. There is sediment. When the machine is deactivated for a period of time, these deposits will accumulate in the oil system, causing the valve core to be blocked, the recovery is slow, or the electric valve coil will be magnetized.

2 Due to the dirty hydraulic oil, the valve spool of each action valve has a problem. Please wash the oil tank and replace the hydraulic oil.

Ten, there is a small injection molding machine, the fault is as follows: when the mold is locked and the front and rear shots are displayed, the pressure gauge is displayed to 140 (the mold clamping high pressure stick is not topped to the end switch), but the mold is not under pressure, and the mold is unlocked when the mold is opened. The mold oil pressure will be displayed at once, but still can not open the mold

1 Is the mold opening valve stuck?

2 See if there is no pressure on the mold clamping pressure?

3 Check the opening and closing mold cylinder, you can adjust the two oil pipes to try to confirm the internal leakage or not.

4 The oil seal in the open and close mold cylinder is broken.

11. There is a Haitian injection molding machine. The computer is Fuji of Japan. In the process of production, the mold is not positioned. (The position is set to 800, and the position is 801.9.) There is always an alarm and the mold opening speed has been Very slow, but still not, check the electronic ruler is not loose, what is the cause.

Judging that the value of the effective area of ​​the mold opening is too small! Change the allowable error of the effective position to see the parameter inside, set a ten or more number to see!

12. The injection molding machine is turned off after the production is finished. When it is started on the second day, it will not open. What is the reason?

1, must be in the mold closing, high pressure clamping position, vacuum and gravity in the mold

2, open and closed mold mechanism moving parts, lack of oil

3, caused by air in the open and closed mold oil circuit

Thirteen, the machine can not open the mold after closing the mold. In the manual state, there is no reaction when the mold is opened. The mold opening pressure also shows 0. Pressing the mold clamping button pressure displays 35, which is a normal value. I would like to ask what is the reason.

1 Increase the pressure and speed to open the mold!

2 Pressure pre-adjustment is the system's total pressure is increased and then turned on.

3 Check the opening and closing mold cylinder piston oil seal

4 2 proportional ammeters work, you can also turn on the current to open.

5 The manual open mode signal is not sent to the computer controller. First look at the other action meter pressure gauge, pressure, flow ammeter indication is normal, adjust the pressure to try it! If the machine is normal, you can't open it, check the oil circuit , mold opening position, etc.!

14. After the product is injection molded in the production process, the mold cannot be opened in a semi-automatic state.

1 First confirm the presence or absence of the product in the mold, and then treat it differently

2 Confirm the manual, semi-automatic state to control the situation separately

3 open mode signal, open mold solenoid valve, pressure flow situation

4 Check if it is under pressure in the semi-automatic state