Building Material Curtain Wall Aluminum Profile Manufacture

Common CNC Processes for Aluminum Profiles

1. Milling

• 3-axis to 5-axis milling for complex shapes

• Face milling for flat surfaces

• Profile milling for contouring

2. Drilling & Tapping

• Precision hole creation

• Thread cutting for fasteners

3. Routing

• Cutting openings or slots

• Edge profiling

4. Engraving

• Adding identification marks

• Creating decorative patterns

How to design Aluminum profile for curtain wall ? 

aluminum profile progress in curtain wall systems involves several key stages, from design and extrusion to fabrication and installation. Below is a detailed breakdown of the process:

1. Design & Engineering

• Architectural Specifications: The profiles are designed based on the curtain wall’s structural, thermal, and aesthetic requirements.

• CAD Modeling: Detailed 2D/3D drawings are created, including dimensions, tolerances, and connection details.

• Structural Analysis: Finite Element Analysis (FEA) ensures the profiles can withstand wind loads, seismic forces, and thermal expansion.

2. Aluminum Extrusion

• Billet Preparation: High-quality aluminum (typically 6063-T5 or 6061-T6) is heated (~450°C) and homogenized.

• Extrusion Process: The billet is forced through a die to form the desired profile shape.

• Cooling & Stretching: The extruded profile is cooled (quenched) and stretched to relieve internal stresses.

• Cutting to Length: Profiles are cut into standard lengths (typically 6m).

3. Surface Treatment

• Anodizing: Electrochemical process for corrosion resistance (common thickness: 15–25 microns).

• Powder Coating: Applied for color and durability (typical thickness: 60–80 microns).

• PVDF Coating: For high-end projects requiring superior weather resistance.

4. Fabrication & Machining

• CNC Cutting & Drilling: Profiles are precision-cut and holes are drilled for fasteners.

• Milling & Notching: For complex joints and thermal breaks.

• Thermal Break Installation: Polyamide strips are inserted for thermal insulation (if required).

5. Quality Control

• Dimensional Checks: Using CMM (Coordinate Measuring Machine) for accuracy.

• Hardness & Strength Tests: Ensuring compliance with ASTM B221 / EN 755 standards.

• Coating Adhesion Tests: Cross-cut or bend tests for coatings.

6. Assembly & Installation

• Frame Assembly: Mullions and transoms are assembled on-site or pre-fabricated.

• Glazing: Glass panels are installed with structural silicone or pressure caps.

• Sealing & Weatherproofing: Gaskets and sealants are applied to ensure water/air tightness.