Part twelve:Pitted surface,extrusion defect analysis and quality control method

Part twelve:Pitted surface,extrusion defect analysis and quality control method

Pitted surface,extrusion defect analysis and quality control method

Pitted surface causes and solutions

Pitted surface

This is a surface defect of the extruded product, which means that the surface of the product has a small rough and uneven continuous patchy sheet and point scratches, pitting and metal protrusion.

The main causes of pitted surface:

1. The mold hardness is not enough or the hardness is not uniform;

2. Extrusion temperature is too high;

3. The extrusion speed is too fast;

4 The mold bearing is too long, rough or sticky metal;

5. Extruded mill finish profile is too long.

Solutions for pitted surfaces:

1. Improve the hardness and hardness uniformity of the mold bearing;

2. Heat the extrusion container and billets in accordance with the regulations, and use an appropriate extrusion speed;

3. Reasonably design the mold, reduce the surface roughness of the mold bearing, and strengthen the surface inspection, repair and polishing for bearing of mold;

4. Use reasonable aluminum billets length.

Brightstar Aluminum Machinery provides not only aluminum profile shape corrector, aluminum profile wrapping machine and aluminum profile polishing machine auxiliary equipment, but also wood grain effect sublimation machine, aluminum profile brushing cleaning machine and aluminum profile shot blasting machine, etc for our customers.

Turnkey project and completed solution, package deal and one-stop service. 

Contact us now for your aluminum project solution!

Get A No-obligation Quote