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Question:

The material is unstable (PBT).

The outer ring of the injection machine is against the ring. Do you blame the anti ring?It was normal to play PBT before. Now the storage stroke is 10 centimeters long or unstable

Answer:

Non return wear, the cylinder will also be corresponding wear, extended the spray stroke, the room filled, leakage will be more
If you have any questions, or do you know?. My tip: if the screw turns during the injection, it means that the check ring is damaged or the component of the reverse ring is leaking. This is what I did for many years before I mastered it. Wish you success in your work!
The wear and tear of the backstop ring should be replaced in time, because the backstop ring will directly affect the quality of the product. Increasing the amount of storage can sometimes fill the product, but it can not meet the technological requirements of the product. For reference only. During the injection process, if the screw rotates, it shows that the backstop ring is leaking.
First of all, it is necessary to judge whether the extension of the check ring is badly worn. First, reduce the nozzle temperature, no discharge (other section set normal temperature). Then store the material, reduce the injection pressure, and inject the material to see if the material is moving forward. If the screw is not in the state of the discharge, the screw forward, it shows that the return to wear, the faster the speed, indicating that the wear is about serious

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