Aluminium Extrusion Plant & Machineries

Aluminium Extrusion Plant & Machineries

At JNS Heats, we design and manufacture high-performance aluminium extrusion plants and machinery that deliver precision, consistency, and durability.

Our systems are engineered to produce superior-quality aluminium profiles for applications across automotive, construction, electrical, and aerospace industries.

The Aluminium Extrusion Plant & Machineries is a combination of heat, pressure, and precision control — transforming solid aluminium billets into continuous, uniformly shaped profiles that meet exact dimensional and mechanical requirements.

Step-by-Step Aluminium Extrusion Plant & Machineries

1. Billet Casting & Preparation

The process begins with casting aluminium billets — solid cylindrical logs made from pure aluminium or alloy blends.
Before extrusion, billets are pre-heated in a billet heater or furnace to a temperature of around 400°C – 500°C.
This controlled heating ensures the metal becomes soft enough to be extruded, yet firm enough to maintain its structure.
Proper temperature control is crucial — too hot may cause surface defects; too cold may result in cracking.

2. Die Preparation & Preheating

While billets are heating, the extrusion die — a precision-engineered steel tool containing the desired profile shape — is cleaned, inspected, and preheated (typically around 450°C).
Preheating prevents thermal shock when the hot billet makes contact and helps ensure smooth, uniform metal flow during extrusion.
Each die is manufactured with micron-level precision to achieve tight dimensional tolerances in the final product.

3. Billet Loading & Extrusion

The heated billet is transferred to the extrusion press container.
A hydraulic ram pushes the billet through the die opening at high pressure — forcing the aluminium to take the shape of the die cavity.
As the metal flows, it forms a continuous length of extruded profile with consistent cross-section.
During this stage, lubrication and controlled pressure are critical to achieving smooth surface finish and proper grain structure.

4. Quenching (Cooling)

Once the profile exits the die, it passes through a cooling zone (air or water quenching system) to rapidly lower the temperature.
Proper quenching ensures mechanical strength, hardness, and dimensional stability of the extruded section.
The type of quenching system (air mist, fan, or spray) depends on the alloy type and desired mechanical properties.

5. Stretching

After quenching, the extruded profile may contain minor twists or distortions due to uneven cooling.
A stretching machine gently pulls the profile to straighten it and relieve internal stresses.
This step ensures that the profile is dimensionally accurate and free of deformation, making it suitable for further processing.

6. Cutting to Length

Straightened profiles are then cut into required lengths using automatic saws.
This allows for easy handling, transport, and preparation for the next process (aging or finishing).
Cutting precision directly affects yield and downstream efficiency.

7. Aging (Heat Treatment)

To enhance mechanical strength and hardness, profiles undergo artificial aging in controlled furnaces (usually 170°C–200°C for several hours).
This heat treatment allows the alloy to precipitate hardening phases, improving durability and machinability.
Our energy-efficient aging ovens ensure uniform temperature distribution for consistent results.

8. Surface Finishing (Optional)

Depending on the application, the extruded profiles may undergo:
Anodizing – for corrosion resistance and decorative finish
Powder coating – for uniform color and protection
Brushing or polishing – for high-end appearance
These finishing processes improve both aesthetic appeal and lifespan of the product.

9. Quality Inspection & Packing

Before dispatch, every profile is tested for dimensional accuracy, hardness, surface finish, and mechanical strength.
Defective or non-conforming pieces are rejected to maintain international quality standards.
Finally, profiles are wrapped and packaged carefully to prevent scratches or deformation during transport.

Why Choose JNS Heats