Example of a profile extrusion line:

Cooling
Use chilled water to allow for efficient cooling during sizing and quenching while minimizing profile agitation. Use a cooling tank length so that the finished profile does not shrink or distort prior to pullout and cutting. Use sufficient vacuum in the vacuum box to achieve proper profile dimensioning. It should be kept low enough to prevent dragging on the sizing sleeve to eliminate chatter marks.

Finishing
Close control will need to be maintained on the cutting or sawing of the profile into the desired finished length to prevent splitting or shattering. A combination of part reheating and cutter-blade lubrication can significantly improve cut quality. Reheating the part can be accomplished by heated air or water. Use a reheat temperature of 50 degrees Celsius to maintain clean cuts and reduce part stress/bowing