How to set the low pressure and high pressure clamping position of the injection molding machine

Update:20-02-2021
Summary:

The clamping process is usually divided into three/four […]

The clamping process is usually divided into three/four stages, roughly fast/slow-low pressure-high pressure;
Quick clamping, according to the structure of the mold, it is flat, or there is a slider. Different molds first set the pressure/speed/position during rapid clamping, and set the appropriate setting without affecting the efficiency. Pressure/speed/position. Pay attention not only to make the mold smooth, but also to reflect the principle of fast clamping

Low pressure---slow speed. This part is more important. In the jog state, set the pressure to 0, slow down the speed, and return the position to 0, because the machine itself has a bottom pressure. Although the pressure is 0, the mold is still After the mold is closed, because the position is 0, the high pressure cannot be raised. At this time, the low pressure position is changed to the value displayed on the panel according to the position of the mold base displayed on the main panel;

For high pressure, generally speaking, it is necessary to set the high pressure value of the mold clamping according to the projected area of ​​the product and the performance of the material. After setting the appropriate value, you need to adjust the low pressure protection again, press the previous step, and re-correct the position of the low pressure mold clamping. Effective.

1. Under the premise of ensuring the mold clamping speed, the low pressure mold clamping pressure should be set as low as possible, as long as it can offset the friction resistance of mold clamping (the friction resistance between the template and the large column, the friction resistance of the guide pin and the guide sleeve after the movable mold contacts , The friction resistance of the inclined guide column slider, and the friction resistance of the movable template and supporting parts, etc.).

2. Set a sufficient low-pressure protection stroke (should be larger than the size of the product, or larger than the size of the gripper of the manipulator if there is a manipulator). Too large a low-pressure protection stroke will affect the accuracy of the low-pressure protection pressure and low-pressure protection time, so it should be set reasonably.

3. After measuring the actual time of the start and end of the low-voltage protection, set the low-voltage time slightly larger than the actual time (the margin is less than 1 second to ensure that the signal output of the mold-clamping action is stopped in time when there is a foreign body). The principle of the low-voltage protection is If the computer cannot sample the high voltage signal within a certain low pressure time, it is determined that there is a foreign body in the mold cavity. At this time, the computer should in principle stop the output of the mold clamping signal, and simultaneously alarm and output the mold opening signal.

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