2022-01-31
Voith’s new edge trim concept EdgeSaver achieves significant savings in valuable virgin fibers
- EdgeSaver trims the web edge in the stock jet as it exits the headbox
- Saves valuable virgin fibers and reduces energy requirement
- Web width can already be adjusted to individual customer requirements in the wet end
In conventional systems, the edge cut on multi-ply machines is only done after couching, so that the mixed trim residues can only be returned to the lower quality stock cycle. By contrast, the innovative design of the EdgeSaver blade offers a simple and energy-efficient solution for adjusting the web edge directly in the headbox jet. Fibers that exceed the required paper web width are not lost in the couch pit, as they are discharged before the suspension reaches the wire. The discharged stock suspension can thus be returned directly to the primary fiber stock cycle in a single-sort process. In addition, the web width can be adjusted to specific customer requirements in the wet end, which offers crucial advantages, above all when producing various paper grades with different run-out widths. As a result, EdgeSaver helps to significantly reduce raw material costs and thus ensures a smaller carbon footprint.
The EdgeSaver also offers an impressive improvement in paper quality. Thanks to its specially manufactured side shield with a patented, adjustable S-shape, edge waves are minimized. This improves edge stability and also facilitates the successful threading of the web into the press section. The Teflon seal on the underside of the side shield provides an optimal seal to the wire. For the first time, the seal can be adjusted with the machine running.
The EdgeSaver can be mounted to the standard headboxes of all manufacturers. It can be easily installed on both sides of the web in just a few hours during a shutdown. Changing the forming fabric is also not a problem, as the ingenious swivel device enables it to be replaced easily without having to restore the optimized settings on the EdgeSaver afterwards.
About the company
The Voith Group is a global technology company. With its broad portfolio of systems, products, services and digital applications, Voith sets standards in the markets of energy, paper, raw materials and transport & automotive. Founded in 1867, the company today has around 20,000 employees, sales of € 4.3 billion and locations in over 60 countries worldwide and is thus one of the larger family-owned companies in Europe.
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The Group Division Voith Paper is part of the Voith Group. As the full-line supplier to the paper industry, it provides the largest range of technologies, services, and products on the market, and offers paper manufacturers holistic solutions from a single source. The company’s continuous stream of innovations facilitates resource-conserving production and supports customers in significantly reducing their carbon footprint. With its comprehensive automation products and leading digitization solutions from the Papermaking 4.0 portfolio, Voith offers its customers state-of-the-art, digital technologies to increase the availability and efficiency of their systems in all areas of the production process.