Causes of defects in the production of solar frame aluminum profiles

Solar frame aluminum profiles may encounter some defects and defects in the production process. Today we will understand the production defects of solar frame aluminum profiles and find out the reasons for these defects.

1. Cracks. Cracks are serious profile defects. The cracks on the surface of aluminum profile extrusion are due to the excessively high temperature of the ingot blank and the excessively fast extrusion speed. It may also be a mold problem, the film hole is not lubricated enough, the guide path is not installed or the guide path is not suitablsolar frame

2. Unqualified dimensional tolerances. This is a very common poor extrusion of aluminum profiles. The main reasons for this failure are as follows:
① unqualified mold design,
② not strict mold manufacturing,
③ improper mold repair,
④ The temperature of the extrusion ingot is too high,
⑤ the extrusion speed changes too fast,
⑥ the length of the ingot is calculated incorrectly.

3. Unqualified performance, including hardness, tensile strength, yield strength, etc. The main reasons for unqualified performance are too low extrusion temperature, too high or too low artificial aging temperature, improper time control, uneven structure of aluminum rods, and insufficient air-cooling quenching strength, etc

solar photovoltaic fram

4. Bending and twisting are mainly due to improper membrane hole design, improper lubrication, excessive extrusion speed or improper guide path.

5. Bubbles and peeling. This is mainly the problem of the squeeze cylinder. The gap between the squeeze cylinder and the squeeze pad is too large, the inner wall of the squeeze cylinder is worn out, and the squeeze cylinder/squeeze pad is stuck with oil and water; aluminum rods are oil stains on the surface, trachoma and pores on the surface, the temperature of the extrusion cylinder and the aluminum rod are too high; the extrusion die has oil stains, etc.

6, pitting, pitted surface, mold working belt is not smooth, insufficient hardness, inner width; Extrusion barrel and aluminum rod temperature is too high, the extrusion speed is too fast or uneven; the aluminum rod is too long and other reasons.

Aluminium profiles

7. Scratches or ribs, mold workbench is dirty, there are foreign objects; mold work has defects; mold empty knife has sharp spikes; aluminum rods have hard impurities or impurities block the mold holes.

8. Extrusion horizontal lines due to the unreasonable mold design, the working belts of the same part are not of equal length; the extrusion speed is improperly controlled; the extruder is not running smoothly and other reasons.

aluminum extrusion

9. Tail shrinkage. It is caused by reasons such as excessively short extrusion residue, oily or dirty extrusion gasket, unclean surface of the ingot, insufficient cutting length of the product, and sudden increase of the extrusion speed at the end of the extrusion.

solar profile

The above is the 9 kinds of defects encountered in the extrusion production of solar frame aluminum profiles and the reasons for the defects. Our common defects are the two kinds of unqualified dimensional tolerances and unqualified performance, so the aluminum profile must be pay more attention to the details during production.

Post time: Dec-22-2021