A good aluminum extrusion shapes is based on superior extrusion productive facility, which can ensure the extrusion profiles' quality and accuracy and reduction of waste.In the whole process of aluminum extrusion, extrusion tools include Homogeneous furnace, aluminum bar hot shear furnace, extrusion press, extrusion die, on-line cooling unit, puller with auto-saw, carryover bed production line, drawing & straightening unit, final profile saw, mold-heating furnace, aging furnace.  
Different machine has its own role.Homogeneous furnace is to make the aluminum bar more even-textured.aluminum bar hot shear furnace is to heat bar and saw it to be suitable size.Then extruder(extrusion press) and extrusion mold will extrude the aluminum bar to be the shape you want.Cooling unit will help cool the scalding shape,which includs wind cooling or water cooling.While puller with auto-saw, carryover bed production line will make saw shapes to be suitable length and move more quickly.Then drawing & straightening unit will make the shape more straighten. Final saw will saw shapes to the length of fianl product.And the last step is aging furnace, which will help mechanical propertie of shapes.  
By the way, the biggest country of manufacturing aluminum extrusion tool is China with best value for money now. And several biggest exturders(extrusion press) are in China.  
I am the expert of aluminum extrusion, if you have any question of aluminum extrusion, don't worry, just let me,I am glad to help you.My email is E-mail:ouchanghai@hotmail.com