CNUD EFCO GFT process
The annealing lehr is a key factor in the glass manufacturing process – this is where the tension and quality of the glass are determined. CNUD contributes its experience with over 300 annealing lehrs installed to date – perfectly complemented by Grenzebach’s expertise as a specialist in conveyor technology.
More than 60 years of experience: the best basis for an accurate annealing process.
From the tin bath, the 600 °C glass moves on rollers through the dross box into the annealing lehr. The optimal cooling curve depends on the customer’s specific requirements; it is determined by criteria such as the composition, thickness and width of the glass, tonnage, and speed. In calculating this curve, CNUD EFCO GFT can rely on a program that has been established on the market for almost 60 years.
Ongoing developments will allow more flexibility on the glass ribbon speed to better fit with the glass shrinkage. Developments that will also contribute to safety improvements.
The right combination between the radiation process and the convection process
Precise measurements right from the start.
Heat is valuable. Why not make full use of it?
We don’t miss a trick in temperature measurement.
Let us help you create a “thinking” factory.
The future of the glass manufacturing industry is digitalization, which means that all stages in the process not only deliver and process data, but also communicate with each other. That’s what we call smart production.
Thickness measurement in the hot area and two-sided temperature measurement are just two of the features involved. The measurement of the glass ribbon’s width offers an additional advantage: by combining the drawing speed of the annealing lehr with the thickness and width of the glass ribbon, it is possible to calculate the tonnage precisely. And by measuring the glass’s position, ribbon swing can be detected and corrected at an early stage. Moreover, the data from the annealing lehr generate conclusions for the entire production process, particularly the cold end. This data gathering and analysis and the resulting conclusions offer real added value for glass producers.
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CNUD EFCO GFT has extensive experience with the thermal processes of a glass production line upstream of the cold end, where the quality of the glass ribbon and thus the customer’s yield are determined.
More and better output thanks to fully data-driven processes.
CNUD EFCO GFT’s experience and process knowledge combined with data resulting from Grenzebach’s inspection solutions to form a fully integrated approach. By using SERICY, the digitalization platform developed by Grenzebach, we will be able to record and analyze all relevant parameters of a production batch or even a single glass sheet along the entire production line and archive the information for later tracking. Glass producers can use this input for process optimization – right down to concrete recommendations for plant operators and reliable data for quality managers.
Float lines references per Region
A universe of variety.
Joining forces for the glass industry
Grenzebach and CNUD EFCO GFT: a symbiosis that benefits you in so many ways.
The merger of CNUD EFCO GFT and Grenzebach combines all the system components that are essential for the glass pane in its final form. From the tin bath to the annealing lehr to the cold end and the transport of the finished product to the warehouse: now everything is available from a single source. As a glass manufacturer, you benefit from integrated high-tech solutions with reduced coordination effort – starting from synergies in design and engineering and extending to lifelong service and support from a single supplier.
Your advantages with CNUD EFCO GFT and Grenzebach:
- Comprehensive technology integration
- Strong, focused engineering
- Reduced project management effort
- Uniform control concepts, fewer interfaces
- Intuitive operation of the glass plant
Overview of solutions
The tin bath is the heart of every float glass production line; it is a decisive quality factor. Consequently, at CNUD EFCO GFT, it is always tailored to each customer’s requirements. Using process simulation, we are able to extract the ultimate in yield and quality.Discover more
Waste heat recovery
Environmental protection and economic efficiency can go hand in hand if the right solutions are used. With our innovative systems for waste heat recovery, you can make your glass production more energy-efficient while creating a new source of energy for your company – this means more profit for you and a big plus in sustainability.Discover more
Service and support
Construction and commissioning of a new glass production line is only the first stage in a good customer relationship. Professional service in daily operation is just as important: We want your investment to be profitable without any interruption – that’s why our engineers are there for you with guidance and support over the entire life cycle of the plant.Discover more
Since late 2019, CNUD EFCO GFT has been part of the Grenzebach Group, linked to it by common high standards of high-tech and quality. A large proportion of the flat glass produced worldwide passes through Grenzebach’s cold end – from inspection, cutting, snapping and stacking to transport. With the integration of CNUD EFCO GFT, the entire float glass production line is now available from a single source.Discover more