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Address:No.88 ,Beiguan Industry zone,Jiaozhou Qingdao City ,Shandong Province, China 

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Frequently Occurred Faults in Plastic Pipe Production Line and Relevant Treatment Methods

2019-12-23

Treatment of common defects in pipe production line:

1. The coking marks on the extrusion pipe surface of the extruder may be caused by too high temperature of the machine body or the machine head; Nose and filter are not clean. Speculation about impurities in grain. The material has poor thermal stability or the thermal stability dose is too small; The control thermometer failed.

2. The black stripes on the outer surface of the extrusion tube of the extruder may be caused by the high temperature of the head and the unclean filter.

3. Extruder extrusion pipe has no luster appearance, and die temperature is too low or too high.

Frequently Occurred Faults in Plastic Pipe Production Line and Relevant Treatment Methods

4. The wrinkling of the outer surface of the extrusion tube may be caused by uneven temperature near the die; The cooling water is too hot. Traction is too slow.

Frequently Occurred Faults in Plastic Pipe Production Line and Relevant Treatment Methods

5. The roughness of the inner wall of the pipe extruded by the extruder may be due to the low temperature of the mandrel; The fuselage temperature is too low; The screw temperature is too high.

6. Cracks on the inner wall of extrusion pipe of extruder may be impurity materials; The core rod temperature is too low; The fuselage temperature is too low; The traction speed is too fast.

7. The inner wall of the extrusion pipe of the extruder is uneven, which makes the screw temperature too high and the screw speed too fast.

8. Bubbles in the inner wall of the extrusion pipe of the extruder will make the material damp.

Frequently Occurred Faults in Plastic Pipe Production Line and Relevant Treatment Methods

9. The thickness of the extruded pipe wall of the extruder is not uniform, so that the mold is opened and the core mold is not aligned; The head temperature is not uniform; Unstable traction; Compressed air is unstable.

10. The crooked pipeline may cause uneven wall thickness of the pipeline; The temperature near the nose is not uniform; The cooling tank of the pipe production line head is misaligned in the middle of the traction cut. The holes at both ends of the cooling tank are not concentric.

11. Extruder products are fragile and cannot be plasticized. The screw speed is too fast; Head temperature is too low; The viscosity of resin is too high.

Frequently Occurred Faults in Plastic Pipe Production Line and Relevant Treatment Methods

12. The longitudinal or transverse shortening of the pipe can greatly reduce the radial difference between the sizing sleeve and the inner diameter (transverse) of the die; High traction speed (longitudinal).

13. The temperature of the feeding section is relatively high due to the occasional slow discharge in the extrusion process of the extruder. Water enters the fuselage; The melt pressure of the die is relatively low.


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Address :No.88 ,Beiguan Industry zone,Jiaozhou

Qingdao City ,Shandong Province, China 

Email :info@co-plastic.com

Phone:+8615269297089


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