Grenzebach’s latest generation of annealing lehrs sets new benchmarks in cooling performance and energy efficiency. With its state-of-the-art design it is built to meet the demands of modern float glass production.

Five Key Advantages at a Glance:

1. Up to 50- 70% Lower Energy Consumption (due to lehr configuration)
   The lehr’s energy savings result from highly efficient cooling, optimized insulation and minimized heat loss. These features also significantly reduce CO₂ emissions.

2. Precise Process Control
   Individually controllable heating and cooling sections, combined with shorter module lengths, enable smaller control zones for more accurate temperature regulation. This ensures faster reaction times to process changes and improved process control.

3. Flexible Annealing Point & Optimized Tension Distribution
   Adapted temperature profiles allow for a flexible annealing point and improved stress control across the glass ribbon. In the Grenzebach annealing lehrs we also blow the cooling air in the radiation area through a battery of one-piece heat exchangers, the design of which prevents contamination of the glass

4. Minimized Risk of Scratches
   Segmented drive trains with controlled servo motors compensate for glass contraction during cooling. This significantly reduces surface stress and the risk of scratches, especially with thinner or high-value glass.

5. Optimized Operation and Maintenance
   The drive system is designed for a simplified maintenance of the lehr. Innovative protective covers enhance personnel safety, and supports smooth day-to-day handling. Additionally, noise levels are significantly reduced, improving the overall working environment.

Grenzebach offers production lines for manufacturing high-quality pattern glass, specifically tailored for photovoltaic (PV) module applications. Since 2020, we have successfully installed around 280 cold end systems for the solar glass market — a testament to our industry expertise and reliable technology.

Our comprehensive solutions cover the entire process, from the annealing lehr through cutting, stacking, and conveying. Grenzebach’s pattern glass lines support production capacities from 150 to 300 tons per day, engineered to meet the specific thicknesses and size requirements for solar panels. We enable the production of glass thicknesses between 1.5 and 6 mm.

With a strong focus on product quality, our technology helps glass manufacturers achieve the high standards required for solar modules. Whether it's ultra-clear glass with high light transmission, structured surfaces for light bundling, or low-reflection finishes, our systems are designed to deliver.  In this context we also support precision edge grinding and high-accuracy stacking. Grenzebach’s advanced robotics ensure exceptional stacking precision, while our conveying and automation technologies enable efficient, careful transport of raw and finished glass. Designed for delicate substrates, our systems combine ultra-precise handling with high reliability.

From cutting and handling to conveying and process control, Grenzebach technologies are developed to optimize pattern glass production. Customers rely on our proven cutting accuracy, productivity-enhancing innovations, and excellent price-performance ratio. All backed by our trusted after-sales service and long-term partnership approach.

Grenzebach offers a comprehensive portfolio of cutting, conveying, and stacking equipment for the cold end of float glass production. Our technologies are designed to optimize process efficiency, reduce downtime, and ensure the precise handling of every glass sheet.

Stacking Solutions:

Our cold end stacking systems cover a wide range of applications. The portfolio includes portal stackers, swing stackers, direct stackers, under-table stackers, and cutting-edge robotic technology. Our versatile solutions allow glass sheets to be removed from various positions—whether from the tin or air side, across multiple levels with tiers and drops, and through static or dynamic (picked on the fly) methods. With single or dual pick options, we provide greater efficiency tailored to the needs of modern glass manufacturers. The smart combination of two stackers enables fully flexible production capabilities, ideal for managing extra-long sheets.

Cutting Technology
Our cutting portfolio is complemented by the new Float Cut Business system – developed with efficiency and compactness in mind. Delivered pre-assembled and fully tested, it minimizes installation effort and start-up time on site. Featuring optional double-sided equipped cutting bridges it offers a space-saving design. The FloatCut Buisness also supports cutting widths of up to 6,200 mm, meeting the increasing demand for oversized glass formats.

With a strong focus on reliability, modularity, and performance, Grenzebach’s cold end solutions help manufacturers achieve consistent quality, increased throughput, and operational excellence – from the first cut to the final stack.

Grenzebach’s Dross Box ensures precise and reliable handling of the glass ribbon during its critical transition from the tin bath to the annealing lehr in float glass production.

Featuring a simplified and fast height adjustment of the lift-out rollers, the Dross Box allows an individual adaptation of curve geometry to meet specific production needs. This not only enhances process reliability but also provides greater flexibility for manufacturers, particularly when producing varying glass thicknesses.

The Dross Box can be equipped with different typs of roller types—including steel, coated steel, and ceramic—giving manufacturers the flexibility to choose the most suitable option.

Advanced insulation and optimized atmosphere separation guarantee consistent temperature distribution across the glass ribbon while minimizing heat loss, crucial for maintaining high product quality and energy efficiency.

Designed with easy maintenance and improved operator safety in mind, the Dross Box allows for quick replacement of graphite bars. Continuous cleaning of the rollers is achieved through multi-part graphite bars with pneumatically adjustable contact pressure, ensuring a clean process.

With its innovative design, adaptability, and performance-oriented features, Grenzebach’s Dross Box establishes new benchmarks for precision, and efficiency in float glass production.