The screw of injection molding machine is an important part of injection molding machine. Its function is to stop the delivery, compaction, condensation, mixing and pressure of plastic. All these are completed by the rotation of the screw in the barrel. When the screw rotates, the friction and mutual movement between the plastic and the inner wall of the barrel, the bottom surface of the screw groove, the advancing surface of the screw edge and between the plastic and the plastic will occur.

Screw plays an important role in the consumption of injection molding machine. Once the problem appears, it directly affects the consumption efficiency and quality of the enterprise. How to deal with it has become the most important problem. The following are the common problems and solutions of the screw of injection molding machine.

For example, the screw of injection molding machine often slips. What is the reason for the poor temperature stability of the barrel? The temperature stability is poor. Generally, the temperature controller is poor or the cycle is unstable. The plastic moisture is often caused. At the same time, the screw is worn, which can also cause the temperature instability.

FAQ 1: how to deal with the screw slip of injection molding machine? In the pre molding stage of the screw, when the screw rotates in the barrel and escorts the material in the direction of the screw and retreats to accumulate the material for the next injection, the screw will also slip. Assuming that the screw begins to slip in the pre molding stage, the axial movement of the screw will stop when the screw continues to rotate. The reason for the screw slip of injection molding machine: the difficulty of pressing at the feeding port and the insufficient adhesion of the barrel length make the screw slip.

There are two ways to deal with the screw slip of injection molding machine: the first way is to participate in a small amount of materials to stop cleaning the end of the barrel, and check the melting temperature at the same time. If the residence time is short, the melting temperature will be lower than the set value of the barrel temperature.

The second method, pay attention to the observation of the molded products, assuming that there are black spots or light stripes, marble stripes, it indicates that the materials are not well mixed in the barrel.

Common problem 2: the screw of injection molding machine does not cut, when the injection molding is consumed, the screw often rotates but does not cut, so the normal consumption cannot be completed. Common reasons and disposal methods for the screw of injection molding machine does not cut:

1. If the discharge port of the barrel is blocked, check whether there is any congealed plastic block sticking.

2. The temperature control is not accurate, the temperature at the rear end of the barrel is too high, adjust the temperature setting, and check whether the cooling water circuit can be blocked.

3. The screw shows the phenomenon of gluing - the plastic wrapped screw rotates together.

4. Too much oil is added to the plastic to make the screw slip.

5. Too much recycled material is added to the plastic.

6. The wear of screw and barrel and the wear of rubber ring may cause the screw barrel of injection molding machine not to discharge, forming the leakage of plastic and not to the front of barrel.

7. If the plastic particles are too large, the phenomenon of bridging will appear. Only the plastic needs to be crushed again.

8. It is assumed that the new screw does not discharge, which may be due to the improper design of the barrel and the screw discharge port. As for the screw, the screw slot in the feeding section of the screw is too shallow, which causes that the screw cannot drive the plastic forward during the rotation, or it may be due to the small amount of material to be conveyed and the barrel is the design of the discharge port.

How to deal with the screw slip of the injection molding machine? It is a common problem of the injection molding machine that the screw is not cut. These are experience talks, which can be used for reference. In the operation of theory, we will encounter more common problems of injection molding machine screw, record and accumulate well, so that we can handle the problems in the future!