1. The reason for the presence of burn marks on the surface of the extruded tube by the extruder is that the internal temperature requirements of the machine body or head are too high; The machine head and filter are not clean and the production is clean; There are impurities in grain guessing; Poor thermal stability of the material or insufficient thermal stability dosage; The instrument system for controlling the working temperature has malfunctioned.
2. The appearance of the extruder tube has black stripes, which can cause excessive head temperature and uncleaned filters.
3. The dim appearance of the kneaded pipe may be caused by the mold temperature being too low or too high.
4. The presence of wrinkles on the surface of extruded pipes using an extruder may be due to uneven temperature distribution in the surrounding environment near the die; The cooling water is too hot; The traction speed is too slow.
5. The rough inner wall of the pipeline extruded by the extruder may be caused by the low temperature of the core rod; The body temperature is too low; The temperature of the screw is too high.
6. There are cracks on the inner wall of the extruder pipe, mainly due to material and impurities, low core rod temperature, low body temperature, and high traction speed.
7. The inner wall of the extrusion tube of the extruder is uneven, and the temperature of the screw is too high; The screw speed is too fast.
8. There are bubbles on the inner wall of the extrusion tube of the extruder, which may cause moisture to the material.
9. The thickness of the extruded tube wall of the extruder is uneven, and the mold and core mold may be incorrect; Uneven temperature of the machine head; Unstable traction; Compressed air is unstable.
10. Bending of pipelines can lead to uneven wall thickness; Uneven temperature near the nose; The cooling groove of the middle machine head of the traction incision is not aligned; The holes at both ends of the cooling box are not concentric.
11. The brittleness of the extruded products from the extruder cannot be reduced by the plasticizing ability of the machine body; The screw speed is too fast; The temperature of the machine head cannot be too low; The viscosity of the resin system is too high.
12. The longitudinal or transverse direction of the pipe can shorten the radial difference between the large sizing sleeve and the inner diameter of the die (transverse); The traction development speed is significantly higher (longitudinally).