As demand for aluminum in solar and EVs rises, choosing the right extrusion press is critical. Wonsten Group discusses specific pressure and isothermal extrusion technologies.
From Billet to Precision Profile: Mastering the Extrusion Process
The global push for “Lightweighting” in automotive (EV battery trays) and the boom in renewable energy (solar frames) has created an unprecedented demand for high-quality aluminum profiles. However, producing these complex cross-sections requires more than just brute force; it requires intelligent extrusion management.
The Critical Metric: Specific Pressure
Many buyers focus solely on the tonnage (e.g., 2000T vs. 4000T). However, Wonsten Group advises clients to calculate the Specific Pressure based on the alloy and the profile complexity.
6000 Series Alloys: Standard construction profiles run well on standard presses.
7000 Series (Aerospace): Requires significantly higher specific pressure and rigid alignment to prevent die deflection.
Isothermal Extrusion: The Quality Secret
One of the biggest challenges in extrusion is heat generation. As the aluminum is forced through the die, friction creates heat. If the temperature rises too high, the profile surface tears or loses mechanical properties.
Wonsten Group’s advanced extrusion lines feature Isothermal Speed Control. The system monitors the exit temperature and automatically adjusts the ram speed. This ensures that the profile at the end of the billet has the exact same grain structure as the profile at the beginning.
The Complete Turnkey Solution
An extrusion press does not work in isolation. Efficiency comes from the integration of the entire line:
Log Heating: Tapered heating to compensate for friction heat.
Quenching: Precise air or water cooling to lock in mechanical properties.
Handling: Automated pullers and run-out tables to prevent scratches.
At Wonsten Group, we don’t just sell machinery; we engineer production lines that maximize the yield from every aluminum billet, ensuring your business stays competitive in a lightweight future.
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