PROCESS HEAT

PROCESS HEAT
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INDUSTRIAL HEATING

Swiss hot air technology

All over the world, blowers, hot air blowers, ignition blowers and air heaters from Leister are used in countless industrial production processes. Comprehensive know-how based on decades of experience in processing plastics make Leister the ideal partner for individual and standardized solutions in all industries. Leister products for industrial hot air processes convince through precise controllability, simple integration into different production plants, exceptional performance and high durability.

The wide product range in this segment includes particularly powerful line of Leister HOTWIND hot air blowers . This compact hot air blower is characterized above all by its high air volume of up to 900 liters per minute and is ideally suited for integration into shrink and packaging processes in medium and large industrial plants. Here, for example, industrial filling and packaging plants for mineral water should be mentioned.

The MISTRAL, which also belongs to the family of Leister hot air blowers, is even more compact than the HOTWIND, making it suitable for installation in small industrial plants with limited space. Another important advantage of this hot air blower is its high pressure of up to 3.5 kilopascals that it generates. Leisters MISTRAL is used, for example, in the automotive industry for coating aluminium frames.

Due to its high reliability, the Leister IGNITER BR4 ignition blower is ideally suited for all processes in which hot air is required for ignition. Integrated in heating systems of industrial complexes or large residential buildings, the Leister IGNITER excels due to its robustness and durability.

INDUSTRIES

Leister hot air processes impress

EASY TO INTEGRATE

Mechanical engineering

Thermal applications and processes are often used in high-quality machines and production systems for the production of technical components and consumer goods. Controllability of Leister air heaters and heat guns offers a handful of advantages in mechanical engineering. Additionally, Leister impresses with its unrivalled global network of service centers. This ensures that spare parts can be supplied to even the most remote corners of the world. Leister is a reliable hot-air partner for mechanical engineers around the globe.

PAPER AND PRINTING

Production goods

In paper production, the drying process is often accelerated with hot air. When the paper is subsequently printed, it is important that the ink dries quickly to avoid staining. By using hot air, printed paper sheets and paper rolls dry faster and can thus be processed efficiently.
Another common application of hot air in paper processing is the lamination of paper and board with plastic film. Wallpapers are also laminated to enhance them or make them washable.

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Industrial Hot Air Devices

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Application Areas

Drying Process
Leister’s heat guns, air heaters, blowers, and infrared heaters are ideal for all kinds of drying processes. These devices are used in various drying applications. Examples of drying applications can be seen in the manufacturing of paper, textiles, nonwoven material, metals, plastics, and glass components, in film packaging, and in other applications related to foodstuff such as roasting coffee or drying fruits and vegetables.
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Film Shrinking
Hot air is ideal to shrink films and hoses. There are two main areas for this: Heat shrinking in packaging technology and heat shrinking in electrical engineering. Shrink films are often used for packaging. Basically, these are films stretched in the manufacturing process, which contract to their original shape when heated due to the so-called memory effect.
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Heat Treatment
Whether lipstick or chocolate praline, hot air is ideal for refining food and cosmetic products and is used in many different ways. In the final step, Process Heat is used to make various products shine or otherwise refine them, such as roasting. The shine on chocolate or on cosmetic products such as lipstick is often created using hot air blowers. Hot air can even be used to gently process, i.e. roast, coffee beans.
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Embossing Process
The imitation of relief-like structures is achieved by embossing. The material has to be heated beforehand so that primary materials adopt the new 3-D patterns and retain them when cooling. In the production of large-area, multi-layer plastic textiles, tarpaulins and coverings, such as imitation leather or floor covering, heat is used in various places. Typically, the desired surface structure (for example the grain of the artificial leather) is created in a final process step by heating the surface and then embossing it with an engraved roller.
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Sterilization Process
Sterilization means the complete killing of microorganisms and bacteria. It is mainly used for equipment used in food processing, medicine and microbiology. Food is sterilized at temperatures above 100°C for preservation.
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Laminating Process
Laminating involves combining the various mechanical and thermal properties of the individual layers, which improves the properties in the final product. Laminating not only works on traditional laminate flooring, but can also be used with fabrics such as truck tarpaulins and foam. Here, the laminating process simply describes firmly joining several layers using a heat source, with or without adhesives, and is a common method found in manufacturing. The heat source required can be from both Krelus infrared heaters and hot air blowers from Leister.
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Plastic Forming
Plastic membranes and linoleum are easily molded with hot air. Plastic tubes and plexiglas windows can be bent when heated up and keep their shape after cooling down. When laying membranes on roofs or in underground engineering applications, the plastic is able to form at awkward points, making it easier to process later on. When plastic or linoleum flooring is being laid, hot air can also be used to shape the single ply into the required form, raising it into corners and laying on stairs, for example.
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Thermoforming Process
In thermoforming, a plate-shaped plastic is heated uniformly before it is formed three-dimensionally by vacuum deep drawing or in a closed mould with a press. This technique is ideal for giving plastic a permanent new shape. Thermoplastics can be heated to such an extent that they soften and can be formed. In order to ensure sufficient flexibility of the material before the forming process, either the complete component or parts of it are heated by hot air or infrared radiation.
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Shrink Tubing
Insulating or marking cables with heat shrink tubes is a common application at home for an electrician or in cable harness production. Special plastic hoses, known as heat shrink hoses, contract considerably when exposed to heat, thus protecting the products enclosed from mechanical damage or electrically insulating them. In this application, hot air is the most common method. Leister has many years of experience in this area, as well as a leading position in the market. In electrical work, heat shrink hoses are used either for repair or for providing electrical insulation protection and corrosion protection.
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