Vetrox
The Vetrox process is a process patented worldwide by the Swiss company VETROX AG to eliminate damage such as scratches or chemical burns on glass surfaces .
Problem
The problem with a scratched window is the visual impression. Glass scratches are essentially due to unprotected work in the immediate vicinity, incorrect cleaning activities or scratches from vandalism .
Even normal loads, vibrations or uneven heating lead to the breaking strength being exceeded .
See also: glass processing techniques
Procedure
The basic principle is based on a machine unit that is placed on the glass in the area of the damaged glass surfaces by means of suction cups arranged in the shape of a parallelogram . Within this parallelogram, an electrically driven grinding unit with four degrees of freedom (all axes and rotation ) is precisely controlled and moved over a large area, plane-parallel over the damaged areas.
The slight, variable contact pressure , depending on the roughness of the sanding pad surface (roughness according to FEPA 400 to 5000), as well as the subsequent polishing and fine polishing in connection with a consistent abrasive embedded in a carrier matrix result in a glass surface after several flat work steps corresponds to the original surface or, when viewed microscopically, is even finer than the original glass surface. The results achieved meet ÖNORM B 3738 for undisturbed viewing.
The boundaries of the glass surface to be processed (either sloping away from the edge or square within the glass) are limited by stop curves. The stop curve, variable and tailored to the respective type of glass, controls the entry and exit from the glass surface and is therefore responsible for the quality of the repaired damaged area.
In order to be able to process large areas economically, the tandem machine was also developed, which is based on the same working principle, but uses two sanding discs directly one above the other at the same time. In addition, this allows tandem machine sanding disc diameters of up to 200 mm.
literature
- Patent EP1827755 : Device for Polishing Hard Surfaces, Especially Glass Surfaces.