When the speed of the single screw extruder is very stable, the thickness of the extruded sheet fluctuates periodically, and the current of the extruder decreases correspondingly when the thickness of the sheet becomes thinner. What is the cause?

When the speed of the single screw extruder is very stable, the thickness of the extruded sheet fluctuates periodically, and the current of the extruder decreases correspondingly when the thickness of the sheet becomes thinner. What is the cause? 

This is a typical extruder feeding instability caused by the main reasons are:
① The temperature at the feeding mouth is too high, and the material appears adhesion and agglomeration, which makes the feeding uneven;
② Raw material particles are not uniform, and there is a "bridge" at the feeding mouth, making the feeding unstable;
③ Screw and barrel are caused by wear;
④ There are too many impurities at the filter screen.

The main solutions that can be taken during production are:
① Strengthen the cooling at the feeding mouth, reduce the temperature of the feeding mouth, and prevent the material from sticking;
② Increase the uniformity of the material particles, and the material is fully mixed evenly;
③ Replace or repair the screw or barrel;
④ Clean the filter in time, and add as many layers as possible when using. The rotation speed of the rotary filter device should be properly slowed down.