XXL Tilting Table for Insulation Boards Shredding at UNILIN

To achieve ambitious sustainability targets, UNILIN Insulation relies on a WEIMA WLK 1500 shredder at its site in Desselgem (Belgium) for shredding production scrap and waste from insulation board production. The distinctive feature is the hydraulic tilting table, that can feed panels up to 5.5 meters long into the shredder.

For more than four decades, the Belgian company UNILIN Insulation has been developing innovative insulation products for energy-efficient buildings, thereby helping to reduce their CO2 emissions. More than 1,000 employees work to develop insulation boards and roofing elements that not only make homes more comfortable, but also lower energy bills.

Circular economy as part of the company DNA

As part of the globally active UNILIN Group, the principle of the circular economy forms the foundation of the business model at UNILIN Insulation in Desselgem (Belgium). When procuring materials, the company constantly looks for residual materials or "waste" that can be reused as raw materials. In addition, UNILIN drives the recycling of products at the end of their life cycle. In doing so, UNILIN has set itself ambitious goals: by 2030, 100% of the insulation boards it produces are to be recyclable, and up to 90% of the production waste generated at its sites is to be recycled and reused.

Production of insulation boards from PU foam at UNILIN

Insulation board production at UNILIN Insulation

UNILIN relies on WEIMA for fire-hazardous shredding

To get a step closer to this goal, UNILIN has recently started using a WEIMA WLK 1500 single-shaft shredder to make production scrap and waste from insulation board production recyclable.

The production waste generated is panels consisting of pure polyurethane (PU) foam or PU foam, wood and nails. The latter are a particular source of danger during shredding because PU dust is extremely flammable. To minimize this fire hazard, shredding takes place at a low speed. In addition, the shredder is operated with a hydraulic drive. This allows the bulky panels to be shredded to a particle size < 25 mm.

Stack with sorted UNILIN PU foam insulation boards before shredding with WEIMA

Insulation panels from PU foam

Stack of insulation boards at UNILIN before shredding with WEIMA Shredder

Insulation elements made of PU foam and wood

Hydraulic tilting table for oversized materials

Another challenge was the size of the panels, as they can be up to 5.5 meters long. The solution? The WLK 1500 is equipped with a hydraulic tilting table that is used to feed the material. This special design was developed in close cooperation between the UNILIN and WEIMA teams. As a result, entire stacks of insulation boards up to 5,500 mm in length can simply be fed via the tilting table using a forklift truck. Prior processing is completely unnecessary. This not only saves time, but also personnel and transport costs.

Forklift truck feeds waste insulation boards to the WEIMA WLK 1500 shredder

The insulation boards are placed on the tilt table by forklift.

Further processing of production waste

If insulation boards made of pure PU are fed to the shredder, the material is fed to a briquetting press via an exhaust system after shredding. The highly compressed briquettes are then sold to a company that processes them further and uses them to manufacture new products. If the shredder shreds insulation elements, consisting of PU as well as wood, the extraction system directs the shredded material onto a truck, which takes it directly to another partner company for further processing.

View into the cutting chamber of the WEIMA WLK 1500 shredder during the shredding of PU insulation elements

Shredding of insulation elements

Robustness and reliability as reasons for purchase
The robustness and reliability of the shredders from Ilsfeld were crucial in the decision to choose WEIMA. With a high degree of technical flexibility, the machine was precisely adapted to the requirements, the specific application, and the machine feeding process. The after-sales service offering also impressed the Belgians.

WEIMA WLK 1500 shredder with hydraulic tilting table at UNILIN
Tilting table of the WEIMA WLK 1500 at UNILIN is raised hydraulically
WEIMA WLK 1500 with closed tilting table at UNILIN Insulation

Up to 5.5 meter long insulation elements can be fed via the tilting table without prior processing. During the shredding process, the tilting table remains raised and thus prevents parts from flying out.

„We chose a shredder from WEIMA because we had already had good experience in other business areas. It was particularly important to us that the shredder would be in use for many years and that the machine would run reliably. We are looking forward to receiving the shredder we have ordered for the UNILIN location in Sury-le-Comtal, France.“

Sam Christiaens
Automation Project Engineer at UNILIN Insulation



WEIMA Maschinenbau GmbH

Bustadt 6-10

74360 Ilsfeld


Additional Information

More than 40,000 machines sold worldwide! WEIMA has been manufacturing robust shredders and briquetting presses for the disposal and processing of all types of waste for more than four decades. Our machines include single-shaft shredders, four-shaft shredders, cutting mills, briquette presses, packaging and draining presses. The popular blood orange machines are used in the wood, plastics, paper, metal and waste-to-energy industries.  

Made in Germany. Built for the world. 

Shredders, briquette and draining presses from WEIMA are exclusively made in Germany and come from production plants in Saxony-Anhalt and Baden-Wuerttemberg. Every year, more than 300 employees work on around 1,200 customer solutions from around the globe. We have long-standing sales and service locations in the USA, Italy, India and China. More than 80 representatives supplement this global presence. 

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