How to adjust the clamping force of the injection molding machine?

In practical applications, injection molding machines are widely used in the plastic products industry. However, when the injection molding machine is in use, it will encounter the problem of adjusting the clamping force. This is not only related to whether the machine can produce normally and whether the products produced meet the requirements, but more importantly, the correct adjustment of the clamping force of the machine can extend the service life of the machine. So, how to adjust the clamping force of the injection molding machine?

1. Turn off the mold lifting device switch, adjust the thickness of the mold until both sides of the mold begin to be fixed, and cut off the mold lifting device switch.

2. Manually operate the mold opening until the mold opening is completed, start the mold adjustment device, reduce the mold thickness, generate mold adjustment force, cut off the mold adjustment device, and perform slow mold adjustment operation. The reduction in mold thickness is proportional to the mold force generated, but if the mold thickness is reduced too much, the mold cannot be locked, so the mold thickness must be gradually reduced.

3. Repeat the above 2 adjustment operations until the winch and guide column generate sufficient clamping force. The clamping force is not too high. As long as it can ensure that the injection parts and products will not produce flash during injection molding, the life of the machine can be guaranteed.

4. When adjusting the clamping force, do not use the fast clamping function.

5. At the moment when the low-pressure clamping end stroke switch is released and the clamping end stroke switch is pressed, the pressure gauge will indicate the working pressure value of the clamping cylinder during the clamping action. The display time is very short, which is also the reason why the express clamping cannot be used.

6. The displayed working pressure is usually lower than the actual pressure in the clamping cylinder. Therefore, do not use the highest rated working pressure for a long time to perform clamping operation to extend the life of the machine. It is usually appropriate to reach 80%-85% of the highest rated pressure in the displayed working pressure. For example, it is more appropriate to select a pressure of 120kgf/cm2 for the highest pressure of 145kgf/cm2.

7. Adjustment of low-pressure clamping force. In order to maintain the sensitivity of low-pressure clamping, when adjusting the low-pressure clamping force, the low-pressure clamping CNC value 00 is set. The low-pressure clamping force is slightly higher than the resistance encountered during clamping, and the high-pressure clamping action can be started at the same time.

8. Select normal or fast locking operation, and readjust the relevant stroke switch to make the mold opening and locking actions proceed smoothly.