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  4. In-depth understanding of the problems e...

In-depth understanding of the problems encountered in the extrusion process during the production of silicon core tubes

In-depth understanding of the problems encountered in the extrusion process during the production of silicon core tubes

In the production of silicon tubes, what problems are often encountered in the process of tube extrusion and how to solve these problems? These conditions are generally due to the inexperience of operators in the process and machine operation, which often causes the tube to have a rough external surface and internal jitter. Ring, uneven wall thickness and other phenomena, so we must adjust the process in time to eliminate the failure of the pipe production line to improve product quality. Failure details:

1. The outer surface of the pipe is rough
Adjust the process temperature; reduce the cooling water temperature, the best cooling water temperature of the PE pipe is 20 ~ 25 ℃; check the waterway for blockages or insufficient water pressure; check the barrel, machine head and other heating rings for damage; adjust the sizing sleeve into the water Flow; check the performance and batch number of raw materials; check the temperature of the core of the mold, if it is higher than the temperature of the die section, lower the temperature of the core; clean the aggregate of the mold;

2. Groove marks on the outer surface of the pipe
Adjust the water pressure of the sizing sleeve, and the water output requirement is balanced; adjust the nozzle angle in the vacuum sizing box to make the pipe cool evenly; check the hardware such as the die, sizing sleeve, cutting machine, etc. for the presence of debris, burrs, etc .;
3. Groove marks appear on the inner surface of the pipe
Check whether the inner tube is filled with water. If the water enters, pinch the tube blank of the outlet mold tightly to make the inner cavity closed; reduce the internal temperature of the mold; clean and polish the mold;

4. A jitter ring appears inside the pipe
Adjust the water out of the sizing sleeve to make the water even; adjust the vacuum degree of the second chamber to make the vacuum degree of the rear chamber slightly higher than the vacuum degree of the front chamber; check whether the vacuum seal is too tight; check whether there is jitter in the traction machine; Whether the material is uniform;
5. Outer tolerance of pipe outer diameter
The size of the outer circle can be changed by adjusting the vacuum degree; the size of the outer circle can be changed by adjusting the traction speed; the inner hole size of the sizing sleeve is corrected;

6. Uneven wall thickness
Adjust the wall thickness on the mold; adjust the angle of the nozzle in the vacuum setting machine and the spray box to make the pipe cool evenly; adjust the water out of the sizing sleeve to make the water even out; disassemble the mold, check whether the screws inside the mold are loose, and re-tighten;

If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.


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