Vitreous enamel is applied by 3 separate robotic application systems assuring absolute accuracy of Vitrispan enamel coatings . The steel panels are covered with enamel on both faces which is fused to the metal at temperatures higher than 800ºC creating a virtually indestructible vitrified enamel surface
Our automated system completely guarantees the quality of the enamel both during its application and during the vitrificaction process.
Vitrispan UK work closely with architects and designers to ensure design requirements are realised. AutoCAD® DWG blocks are available for Vitrispan standard details. Vitrispan in house design engineers also can create fulll bespoke detailed designs if required.
Utilising advanced Autodesk Inventor® 3D modelling techniques, in association with laser surveying systems, architectural designs are modelled and fitted in model space ensuring fit and accuracy. Design drawings are then transferred directly to factory CAD CAM for laser cutting to ensure accuracy of even the most complicated designs.
Steel Cutting and Shaping
From especially cold rolled steel sheets the panels are formed to the shapes and sizes detailed in approved drawings carefully studied by our technical department. All cutting and shaping are done in our factory thus avoiding any cutting or treatment at construction sites. Completely shaping the panels prior to vitrification ensures that both faces of the steel are totally protected by vitreous enamel coating.
The vitrificaction process is carried out according to the UNE-EN 14431 norm. The enamels used consist of frits that are milled in water with other materials including clay and coloring pigments to a cream like consistency. The ‘slip' is then wet sprayed directly using specialized robots onto the steel panels. Vitreous enamel consists of a ground coat and a top coat. Ground coats are applied to all sides of the steel panels. The top coat is the final colour coat. After applying each coat the panels are introduced in an industrial oven where the enamel is vitrified at more than 800ºC and adheres to the steel. The resulting thickness of the vitrified enamel is between 185µ y 500µ on the front side and at least 100µ on the back side.
Most vitreous enamelled architectural panels are laminated with backing material for improved performance and flatness. Backings are used for various purposes such as for acoustic performance, fire and thermal insulation and to provide a rigid backing to achieve maximum panel flatness.
The following are the most widely used types of vitreous enamel panel backings:
Fireproof and waterproof timber backing
Calcium Silicate board backing
Hexagonal Cell Phenolic ‘Honeycomb' backing
Hexagonal Cell Aluminum ‘Honeycomb' backing
Terophon backing (acustic material)
Before proceeding to the vitrificaction process, the shaped panels are degreased in order to enable the correct adherence of the enamel coating.