Extruded composite is a high pressure high temperature rapid processing of plastic process, which links to the machine, a variety of factors raw materials, personnel of each operation. The actual process will be a variety of abnormalities, now on a variety of anomalies will be described.
| Problems | CAUSE | Solution |
| Poor adhesion |
1. The resin surface oxidation is not sufficient 2. The resin temperature is too low 3. Composite wheel insufficient pressure 4. incomplete drying primer low printing ink adhesion 5. The substrate is abnormal 6. Check whether the damp substrates |
1.1 increase in resin temperature 1.2 reduce line speed 1.3 increase in the air gap distance 2.1 increase in resin temperature 2.2 increase backpressure 2.3 Check the heater Composite wheel pressure increase 4.1 increasing the drying temperature 4.2 reduce speed 4.3 to adjust the amount of air intake and exhaust Check the base of factor 5.1 5.2 Check the base with non-polluting 5.3 Have damp printing ink Replacing Ink |
| Uneven thickness |
1.T-die temperature is set incorrectly 2. Composite wheel uneven pressure 3. foreign matter adhering to die 4. deflector abnormal |
Re-adjust the temperature 2.1 composite wheel balance adjustment 2.2 Replacing the composite wheel Shutdown, cleaning die 4.1 Check the deflector Model 4.2, lower deflector position adjustment |
| Composite wrinkles |
1. Composite wheel roundness bad 2. The speed is too low 3. Import wheel imbalance The tension is too small 5. Composite wheel of a foreign body 6. The original film is the wrong way to wear paper |
Replace or abrasive composites wheel Increase recombination velocity Import balance wheel adjustment Increased tension Cleaning of wheel Check wear paper mode |
| Gel and fish eye pattern |
1. The resin temperature is too low 2. Resin damp |
To improve resin temperature Re-drying resin |
| Crystallization point |
1. The resin processing temperature is too high 2. Replace the resin is not sufficient |
Lower resin temperature Replace the resin |
| Wrinkles shaft |
1. The winding tension, weakness set improperly 2. The substrate on both sides of the thick |
Reset tension and weakness |
| Poor transparency |
1. The temperature of the cooling wheel |
2.1, increasing backpressure 2.2, adjust the temperature |
| Shrink film |
1. The resin temperature is too high 2. The tension of the tension is too large 3. The composite speed is too low 4. insufficient cooling cooling wheel |
Lower resin temperature Adjust tension Increase recombination velocity Lowering the cooling temperature |