18/04/2026
This video showcases the bending process of Aluminum Curtain Track Profiles performed on a high-precision CNC PBA-500+ aluminum bending machine. The tested curtain track extrusion features a long, rectangular hollow cross-section with open upper and lower channels, a structure commonly used in modern curtain rail and interior track systems. This profile design provides smooth sliding channels and easy installation, but the uneven stiffness distribution creates high demands on section stability and dimensional accuracy during bending.
The bending in this demonstration is performed in the Y–Y axis (Easy-Way bending), meaning the profile is formed along its weak axis. For this type of open rectangular hollow curtain track section, the moment of inertia about the Y–Y axis is relatively small, allowing the aluminum to deform more easily. This reduces forming force and makes springback easier to control, which is especially important for small-radius, high-appearance-quality curved curtain tracks.
However, the open-top and open-bottom geometry of the curtain track introduces significant forming challenges. During bending, the unsupported side walls and running channels can spread, collapse, or twist, which would affect curtain sliding smoothness, track straightness, and installation accuracy. To prevent this, custom polymer internal support inserts are placed inside the upper and lower cavities of the profile. These high-strength, elastic polymer tools are precisely machined to match the curtain track’s internal geometry, providing continuous internal support that stabilizes the section throughout the bending process.
On the external forming side, nylon rollers are used to guide and drive the aluminum profile. Nylon’s low friction and high wear resistance allow controlled forming force to be applied without scratching or marking the visible track surfaces, which is essential for architectural and interior curtain systems.
The CNC PBA-500+ aluminum bending machine is equipped with an IPC (Industrial PC) that can import 3D CAD files of the curtain track layout and automatically generate bending programs. During operation, the CNC control panel displays a real-time 3D simulation of the bending process, showing the current bending position and forming status, ensuring accurate ex*****on of complex curved curtain track designs.
In the end-of-video bonus section, we present close-up views of the polymer internal support tools inside the curtain track and the contact areas between the nylon rollers and the aluminum extrusion. These detailed visuals clearly demonstrate how the internal and external support systems work together to maintain precise geometry, smooth curvature, and high surface quality, which are critical for high-end curved aluminum curtain track profile bending.
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