Precise Glass cutting is achieved on a CNC machine, using ‘computer numerical control’ which is the automation of machine tools by means of a computer executing pre-programmed sequences of machine control commands. The actual cutting is done using a diamond tipped steel disc, which has a V-shaped end and is carried by a head that moves around three axes X, Y and Z. By interpolating the x and y axes we can cut any shape, such as ellipses, circles, trapezoids or parallelograms, the deviation being only +/- 0.5 mm. The ability of the machine to change its cutting head makes it suitable for cutting glass with thicknesses from 2mm to 25mm.
The CNC machines that Glas Expert has at their disposal are glass processing centers based on 3D autoCAD files. The processing heads can follow a 3D trajectory, resulting from the interpolation of the 5 axes X, Y, Z, A and C. The performance software that works with the DXF files, as well as the mechanical elements that make up the machining center’s assembly, allow us to execute glass pieces with dimensional deviations in the order of tens of millimeters.
After cutting the glass to the required size, edge finishing can be done mechanically or manually. Safety and security is the primary goal where edge finishing is concerned, then to improve functionality and appearance. There are a huge variety of edge finishing options: – bevel – the edges are wholly or partially bevelled; – satin finished edge – the edge has been processed with specific tools. The edge finish is matte (satin) and traces left by the diamond disc cannot be seen with the naked eye.
After cutting and finishing glass, drilling is done where necessary. Glas Expert uses CNC machines for drilling glass, in order to diminish the possiblitiy of deviations. All drilling machines use Head-To-Head technology (drilling is done with 2 drills, head-to-head – one that runs under the glass and the other over the glass). All the holes are embossed, eliminating all the tensions around the hole. The risks of glass breakage over time are considerably reduced by this procedure.
Ceramic Printing on Glass requires cutting-edge technology. In 2014 Glas Expert was the first Romanian company to acquire this technology, placing us among the top 30 glass processing companies in Europe. Ceramic ink printing is done in a ‘temperature and humidity’ controlled environment. After printing, the glass is heated to a temperature of 650 – 700 degrees (depending on the thickness of the glass). As the glass is tempering, the ceramic ink practically fuses with the glass and the printed image remains at the same high quality for at least 15 years, unaffected by external factors. The colours are UV resistant and the printed ceramic surface is highly resistant to abrasion.
Through Roller technology, the colours can be more opaque. The technique of applying ceramic enamel with a roller makes it easy to create colours with a high degree of opacity. The machine has the ability to apply a substrate of large quantities of ceramic enamel in a controlled manner, up to 320 grams per square meter. The benefit of using this machine is that the ceramic enamel glasses can be created in bright yet very opaque colours.
New ceramic screen-printing technologies are increasingly removing more and more limits when it comes to using glass as a medium for artwork or decals. Glas Expert uses high-end automated machinary and screens that have various texture mesh resolutions to precisely print images onto the glass surface.
Tempered or hardened glass is produced by heating the glass to a temperature of about 650 degrees Celsius, where it begins to soften. The external surfaces are then rapidly cooled, creating a strong compression effect. This heating-cooling process is electronically controlled and the specific parameters applied influence the final quality of the tempered glass.
Architectural laminated glass is produced from two or more glass sheets bonded under specific temperature and pressure conditions, along with the inclusion of one or more clear, coloured or decorated, elastic ‘foil sheets’ of various thicknesses according to the project requirements. The result is a high performance, durable, moisture-resistant glazing composite that provides solutions for many architectural design issues.
The entire heating and cooling process is performed according to predefined graphs. The the initial ‘heating and cooling curve’ parameters of the glass are carefully set by our specialists, in order to obtain both the contoured design and the glass characteristics (transparency, hardness, image deformation, etc.). The production of curved glass depends on various factors that are all related to each other, such as the type, thickness and quality of the glass, size, bending angle, radius of curvature, type of curvature, quality of the material from which the mold is made etc.
UV glass Bonding is the process of gluing two pieces of glass together using a special UV curing adhesive to create a very strong bond. Glas Expert uses this technology for the production of furniture pieces and much more. Most installations involving glass to-stainless-steel, glass-to-aluminum or glass-to-glass can include the use of this technology. The thickness of the glass is determined by application, mounting, weight etc.