The reasons and preventive methods of injection molding machine's failure to open the mold are described

I believe everyone in the industry knows that the opening force of this injection molding machine is completely less than the clamping force, so the reason for the failure of our injection molding machine opening may be that the resistance of opening is greater than the opening force. But in reality, what is the reason that the injection molding machine can’t open the mold? What are the preventive measures? Now, let’s follow me to understand it!

1、 The reason of the injection molding machine can't open the mold:


1. When the injection molding machine leaves the factory, the mechanical origin of clamping is not adjusted properly. Too far ahead, causing the mechanism stuck, if often can not open the mold, to doubt this aspect, to find manufacturers to adjust.
2. Or is the institution stuck. For old machines, this is not the first case, so we should be suspicious. Usually because the adjustment of clamping force is too large, for example, it is not good to adjust to 1700kg, for example, it is not good to not open the mold for a long time, and it is not good to change the system. This problem is mainly the problem of technician’s tuning habits and parameters. The solution is very troublesome, to remove or loosen the cross bar on the fixed nut
3. The oil seal of the clamping cylinder was damaged and leaked, resulting in the failure of the actual opening pressure. For this reason, the pressure gauge is useless, so the cylinder should be removed for inspection.
4. The valve core of the mold opening solenoid valve has poor movement or is stuck, and the valve core is not in place. The solution is to remove the solenoid valve for inspection.
5. It depends on whether the parameter design is appropriate and whether the pressure is not large enough.
6. There may be a problem with the lubrication of the clamping system. Inspection and maintenance.

2、 Precautions:


In order to prevent failure to open the mold, the following preventive measures should be taken:
1. Correct calculation of clamping force, the greater the better.
2. Do not keep the high-voltage mode locking state when the machine is shut down, remember that.
3. In case of power failure in the mode locking state, it should be handled in time, and the crosshead nut will be loosened if it doesn’t come for a long time.
4. Check the machine oil frequently, and do not block the solenoid valve with iron filings.
5. Check the lubrication of the clamping system to prevent the guide rod from pricking due to oil cut-off.