Wheel grain of aluminium extrusion profile

Sudden interruption of operation during extrusion, sudden changes in extrusion speed, and sudden changes in the size or direction of the squeeze pressure can cause wheel grain. This requires the maintenance of the extruder machine, so that it achieves the required accuracy;

Check the hydraulic system of the extruder machine in advance to ensure that there is no air retention;

Design precise extrusion speeds so that the extrusion rate is uniform, and the extrusion cannot be stopped unless absolutely necessary during the extrusion process.

Long tongue skews in long tongue molds can also cause wheel patterns. This requires adding mold pads, using separate welding chambers or directly redesigning molds.