Are you concerned about how the bending points of straight thermal insulation metal cladding are processed to ensure a perfect fit to the wall? You can refer to our factory's processing technology
Main Bending Methods
Depending on the cladding type and bending angle requirements, the following three processes are commonly used:
1. Cold Bending with a Bending Machine
Suitable for metal substrates with a thickness of 0.5~1.2mm and a thin-layer thermal insulation coating.
2. Roll Forming Pre-bending
Suitable for continuous long-length products such as corrugated plates and trapezoidal plates. The principle is to set up a dedicated bending station on the roll forming production line, using multiple progressive rollers to bend the sheet to the required angle.
3. Heat-Assisted Bending
When the cladding includes a thick organic insulation layer, cold bending can easily lead to breakage or delamination of the insulation layer. The bending area is locally heated to 80~120℃ to soften the insulation layer before bending.
Key Technical Points for Processing Bending Joints:
End Pre-grooving or Notching:For box-shaped components or flanged edges, drill φ3~5mm anti-cracking holes at both ends of the bending line, or punch a V-shaped notch to avoid stress concentration at sharp corners that could cause coating tearing.
Insulation Layer Treatment:For sandwich panels like metal carved panels, the insulation core material in the bending area must be partially removed before bending, leaving only the outer metal plate for bending. After bending, fill the gaps with expanding foam. Otherwise, the core material will obstruct the bending and cause the panel to detach.
Post-Bending Sealing:All exposed cut edges at bending joints must be coated with anti-rust sealant or epoxy primer to prevent moisture from penetrating below the coating and causing electrochemical corrosion. Insufficient coating coverage at the cut edges is the starting point for future corrosion.
Summary
Bending the insulation metal cladding is not a simple processing technique. From the bending direction and radius selection to cut edge corrosion protection, every detail determines the component's lifespan in weather conditions. We suggest that you use leftover material from the same batch to verify the process before formal processing, which will allow for batch bending.
