Leister Technologies - Wedge Welding Machines and Hot Air Tools

LEISTER is a developer and manufacturer of hot air equipment for the mining industry including hand welding tools, automatic welding machines, hot air blowers, heat sources and blowers, electronic controllers and measuring and test equipment.

An independent private company, LEISTER has been developing hot air equipment since 1953 and today reaches markets worldwide with a network of authorized sales and service centres in 52 countries.

We believe that the basis for customer satisfaction lies within the quality of our products and the smooth running global service network. A close network of more than 120 sales and service centers in more than 90 countries ensures competent and responsive service. Distributors and their staff are trained and certified by Leister on a regular basis; therefore, Leister know-how is locally available to you at all times.

COMET automatic wedge welding machine

The COMET is an automatic wedge welding machine for overlap welding and prefabrication of geomembrane liners and foils in earthwork, civil engineering and tunnelling applications.

If you ask an expert in overlap welding about the most important aspect of automatic wedge welding machines, apart from the desired welding result, you will always get the same answer. The size, weight and ease of handling are still the key factors of an automatic welding machine.

With the COMET, which weighs only just over 13 lbs, LEISTER (Kaegiswil/Switzerland) who are the leaders in this field, have marketed a very attractive and reliable automatic wedge welding machine for overlap welding of geomembrane liners in civil engineering and tunnel construction.

The COMET is impressive not only because of its low weight but also because of its compact construction (without remote control box). The width of the overlap of 5 inches is also an impressive feature, which has greatly simplified the work involved in laying and welding. LEISTER have above all focused their attention on easy operation and handling to enable problem-free processing. For example, the swivel head is a feature which guarantees the equalising of pressure between the pressure rollers. This results in easy and fault-free welding of T-joints.

In addition, the COMET offers, independently of voltage fluctuations and various stresses due to ground variations or ambient temperatures, a micro-controller for controlling the welding parameters. The damp and tropics-proof LCD display with background illumination is particularly useful in underground working. Additionally, the digital display facilitates reading of SET and ACTUAL values of the welding temperature, welding speed and operating indicator.

COMET USB

The compact hot wedge welding machine records all relevant welding parameters. Documentation made simple. With the USB memory system designed for use on construction sites data transfer is mere child's play.

• Digital display of welding pressure
• Complete record of all relevant welding parameters.
• USB-memory-system designed for use on construction sites
• Convenient data transfer
• User-friendly

ASTRO USB

The new welding machine complying with DVS 2225-4 not only convinces with its welding power but also with its USB-memory system designed for use on construction site.

• Digital display of pressure
• Acoustic alarm if limit value is exceeded
• Complete record of all relevant welding parameters
• USB-Memory-System