The extrusion rate is the ratio between the billet area used in the extrusion process and the cross-sectional area of the produced profile. In other words:

Extrusion Ratio = Billet Area / Profile Area

Factors that affect the extrusion ratio:

• Press capacity: More powerful presses can achieve higher extrusion ratio.
• Die design: The shape and size of the holes in the die influence the extrusion ratio.
• Aluminum alloy type: Different alloys can be produced with varying extrusion ratio.
• Extrusion temperature: Higher temperatures result in an increased extrusion ratio.

Advantages of a high extrusion ratio:

• More complex profiles can be produced.
• Less material waste occurs.
• Production time is reduced.

Disadvantages of a high extrusion ratio:

• Requires higher press force.
• The die may be more complex and expensive.
• The risk of extrusion defects increases.