sedak bending with high precision

Rounding off our success: bent glass

The best connection between two points is sometimes a curve, i.e., a precisely bent pane of glass from sedak. We also produce glass, max. size 3.2m x 16.5m (126in x 650in), using the hot or cold bending method depending on requirements.

sedak has perfected tried-and-true methods of producing bent glass based on hot bending in the tempering furnace and cold bending over molds or during the laminating process.

Cold bending over rigid Framework.

This process of mold-based cold bending involves emplacement of a shear-flexible PVB interlayer that bonds the panes of glass together. Laminating in a bent state helps support the curved shape. However, supporting the pane's shape in a manner that permanently maintains the curved geometry is still required.

Cold bending during lamination.

This process of cold bending involves bending the individual panes of a glass laminate prior to laminating and subsequently laminating them with the new curved geometry. The finished laminated pane retains its bent shape after autoclaving without the need for a supporting framework to help the glass retain its shape. The unique advantage of cold bending of laminated glass is primarily its better optical quality due to fewer distortions and reflections. The minimum cold-bending radius is about 1500 times the thickness of the glass (e.g., 10mm: bending radius 16m; 3/8in―52ft 5.9in). Please contact our sales department for an analysis of your project; tighter radii might be possible.

Hot bending in the tempering furnace.

Hot bending plus sedak expertise makes even extreme glass shapes possible. For example, cylindrical panes up to 5m (16ft) long or bending angles of up to 90° are feasible.


Overview production capabilities.pdf

Bent tempered glass
min. size 400mm x 600mm 16in x 24in
max. size 3200mm x 5000mm 126in x 196in
heat-treated 6mm - 19mm; max. bending angle 90° 1/4in - 3/4in; max. bending angle 90°
min. bending angle 2000mm (6mm + 12mm) 79in (1/4in + 1/2in)
1500mm (8mm + 10mm) 59in (5/16in - 3/8in)
2500mm (15mm) 98in (5/8in)
3000mm (19mm) 118in (3/4in)
Cold bending
min. cold-bending radius 1500 x thickness
6mm/ 1/4in 9m radius 354in radius
8mm/ 5/16in 12m radius 472in radius
10mm/ 3/8in 15m radius 590in radius