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sedak bending with high precision

Rounding off our success: bent glass

free-form architecture and parametric design approaches increase the demand for curved glass. curved glass brings elegance and uniqueness to every room.

As the demands on building envelopes increase in terms of energy efficiency and design, bending glass is one of the most sophisticated processing methods that requires a lot of expertise and know-how. There are various processes for bending glass to shape glass according to the architectural design. Many factors such as bending radii, performance values, glass size and finishing influence the manufacturing process.

cold bending during lamination for maximum optical quality

sedak has perfected a tried-and-true method of producing bent glass based on cold bending over molds or during the lamination process. 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 (3/8in): bending radius 15m (590in). Tighter radii might be possible. Lamination bent glass is available in cylindrical and spherical shape up to 3.6m (138in) x 20m (787in). 

Please contact our sedak sales department for an analysis of your project. 

sedak production capabilities.pdf


Gravity bending and bending toughened glass

Extreme radii with max. glass sizes of 3.6m (138in) x 11.5m (452in), such as corrugated shapes, half-shells or free forms, are generally bent through two thermal bending processes: Gravity bending and bending toughened glass. Hot bent glass in highest quality is produced by sedak’s subsidiary sunglass industry srl, which is in the group since 2018.

Sunglass industry has unique expertise in gravity bending and bending toughened glass. In both processes, the glass is heated up (600 °C) to the transition range, which enables the extraordinary bending of glass. With great technical skills sunglass industry supplies extraordinary curved glass for outstanding projects.

Our sunglass industry sales team will be happy to advise you on your project with curved glass.

sunglass production capabilities