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    Safe and ergonomic welding of plastic membranes with Leister

    Leister Civil Engineering Applications

    In civil engineering, tunneling, and disposal applications, the quality of the sealing system is the top priority. Any leaks can have fatal consequences. Therefore, it is incredibly important that the processing quality fulfills extremely stringent requirements. Not only the material itself and the processor are responsible for this – in large part, so is the tool used to carry out the work. Leister tools not only facilitate incredibly precise welding, they also stand out from the crowd thanks to their ergonomics. They can be relied on, no matter where in the world they are used.

     

     

    Welding of Geomembranes for Landfill Sites

    Reliable and Durable

    Leister Geostar G7 for geo membrane welding in land fills, pond constructions, tunnelling projects

    When it comes to constructing storage sites, the sealing system is the heart of the installation and it is this system's reliability which is crucial in determining the site's long-term safety. HDPE, PP, PVC or TPO is usually used as the bottom geo-membrane and can be up to 3 mm (118 mil) thick. The top geo-membrane layer (over the bulk goods) generally consists of a thinner material. Leister offers welding machines for all requirements: the hot-wedge and combi-wedge machines are designed differently in terms of welding pressure. Various models are available, from the most powerful and technologically advanced, GEOSTAR wedge welder, to the lightweight TWINNY S. All tools feature special nozzles, hot wedges and pressure rollers, which can be used to double weld the sheets which have been laid in an overlapped arrangement. After welding, the test needle and compressed air can be used to check the integrity of the test channel which has just been created. A version with a USB memory system is also available for certain machines, enabling all relevant parameters to be recorded. Leister also offers the EXAMO, VACUUM BOX, and vacuum bell tools for additional inspection of the weld seam. 

    • Overlap welding of thermoplastic geo-membranes in the construction of storage sites
    • Welding seam quality which can be inspected
    • Welding of details


    Leister has the solution
    Leister offers various hot-wedge and combi-wedge machines for welding HDPE, PP, PVC or TPO materials. Welding seam tensiometers improve safety. A broad spectrum of different hand welding tools completes the range.

    • Efficient welding with machines providing high welding pressure, including for steep pitches
    • Overlap welds with test channel
    • Handheld extrusion welders for the welding of connections and details, and repairs
    • Tensiometers for checking the tensile load and integrity
    • Recording of data with a USB memory system
    • Wide range of hand welding tools and accessories

     

     

    Welding of Geomembranes for Mine Construction

    Powerful and Safe

    Leister plastic welding applications in civil engineering mining

    In mine construction, the material, released mechanically or with explosives, is washed out into collecting reservoirs (heap leaching pads). The leaktight sealing system ensures that valuable minerals or metals released into this water cannot escape into the groundwater supply and that the process water does not contaminate the ground. Leister offers welding machines for all requirements: the hot-wedge and combi-wedge machines are designed differently in terms of welding pressure. Various models are available, from the most powerful and technologically advanced, GEOSTAR wedge welder, to the lightweight TWINNY S. All tools feature special nozzles, hot wedges and pressure rollers, which can be used to double weld the sheets which have been laid in an overlapped arrangement. After welding, the test needle and compressed air can be used to check the integrity of the test channel which has just been created. A version with a USB memory system is also available for certain machines, enabling all relevant parameters to be recorded. Leister also offers the EXAMO, VACUUM BOX, and vacuum bell tools for additional inspection of the weld seam. 

    • Overlap welding of large-area geo-membranes in mine construction
    • Welding seam quality which can be inspected
    • Welding of details

    Leister has the solution
    Leister offers various hot-wedge and combi-wedge machines for welding HDPE, PP, PVC or TPO materials. Welding seam tensiometers improve safety. A broad spectrum of different hand extruders and hand welding tools completes the range. 

    • Efficient welding with machines providing a high welding pressure and heat output
    • Overlap welds with test channel
    • Handheld extrusion welders for the welding of connections and details, as well as patches and repairs
    • Tensiometers for checking the tensile load and integrity
    • Recording of data with a USB memory system
    • Wide range of hand welding tools and accessories

     

     

    Welding of Thermoplastic Geomembranes for Tunnel Sealing

    Versatile and Reliable

    leister comet overhead welding in tunnelling operations

    Tunnel geo-membranes are utilized in surface mining or deep mining. Once the concrete casing is complete, a plastic sealing system made from HDPE, PP, PVC or TPO is usually used to provide protection from any penetrating moisture. The individual sheets are laid perpendicular to the direction of the tunnel. Lightweight and flexible welding machines are required for this "overhead welding." Leister offers several suitable machines in the form of the TWINNY, COMET, and TRIAC DRIVE AT. Details can be welded easily and ergonomically with the handheld extrusion welders, hand welding tools (heat guns), and matching accessories.

    • Overlap welding of geo-membranes in tunnel construction
    • Welding seam quality which can be inspected
    • Overhead welding
    • Welding of details

     

     

    Welding of Thermoplastic Liner for Ponds and Swimming pools

    Leister plastic welding applications civil engineering pond and swimming pool construction

    Artificial lakes, swimming ponds, and swimming pools are all the rage! In order to ensure the safety of the sealing system, reliable tools are needed, which are not only able to weld perfectly, but can also work across large areas economically and ergonomically. Leister offers the right welding machines for all areas and materials. The VARIMAT V2 is particularly well-suited to the overlap welding of large areas with an even surface, as are often encountered in swimming pool refurbishment projects. The flexible and maneuverable UNIROOF, which also is used in the installation or roofing systems, is appropriate for smaller, confined areas. For uneven surfaces, such as those found in artificial lakes, swimming ponds or biotopes, the answer is the hot-wedge machines otherwise used in civil engineering: The small, easy to handle GEOSTAR wedge welders and TWINNY hot-air welders adapt to the surface topography perfectly and weld the thermoplastic geomembranes safely, making them absolutely leaktight. Leister offers a wide range of hand welding tools and matching accessories, such as nozzles or the legendary Leister pressure roller, for welding connections and details. 

    • Overlap welding of thermoplastic geomembranes on various surfaces 
    • Welding of details 

     

     

    Welding of Geomembranes for Reservoirs and Fish Farms

    Leister plastic welding applications civil engineering in reservoirs and fish pond construction

    Leaktightness is an extremely high priority when it comes to sealing systems for distribution reservoirs and fish farm tanks. For the most part, such sealing systems consist of HDPE, PP, PVC or TPO material. Welding must ensure that the material remains totally leaktight in the long term. Reliable tools, but ones which also enable welding to be carried out quickly and, therefore, economically, are needed here to safeguard the safety of the sealing system. The small, easy to handle GEOSTAR wedge welders and TWINNY hot air welders adapt to the surface topography perfectly and weld the plastic geomembranes safely, making them leaktight for the long term. Vertical and horizontal work can be performed on walls too with the lightweight and flexible TRIAC DRIVE AT semi-automatic welding machine. Leister offers a wide range of hand extruders and hand welding tools, together with matching accessories, for welding connections and details.

    • Overlap welding of thermoplastic geomembranes on various surfaces 
    • Welding of connections and details