Double belt presses from HELD are the ideal production systems for the continuous production of sheet and plate materials when using the through-feed method. Using various processes, such as continuous laminating, compacting, consolidation and smoothing, they allow different materials to be processed, such as films, fabrics, mats of fibres, granulates or powders.
In each case, the respective components are run through the press between two endless steel belts – either individually or together. At the intake and the outlet, these steel belts are looped around heated steel drums. Pressure plates, with which heat and pressure are applied to the conveyed materials, are located between them in the so-called reaction zone. The temperature zones can be individually adjusted.
The benefits of an extraordinary technology - The technology used by HELD takes advantage of the benefits of an isobaric pressure pad and effective heat transfer elements. According to the laws of physics, this results in an even pressure distribution and outstanding heat transfer properties, which allow heating or cooling processes under constant pressure. The result: a top-quality, highly efficient production.
Continuous operation at temperatures of 400°C and a specific surface pressure of up to 80 bar have long been the standard for our plants. The same holds true for the versatile uses of our double belt presses: Plants made by HELD have been ensuring an efficient and reliable production in a wide range of industries.
In a series of whitepaper, we compare high temperature processes by means of calandar, static and isobaric presses regarding different materials such as composites and fuel cell components.
Two heating/pressure plates
The reaction zone is formed by two heating/pressure plates. The number of heating/cooling zones is determined by the material requirements. The isobaric pressure cushion is sealed behind the running steel belt via a double sealing system. The continuous pressure zones permit heating and cooling while maintaining an isobaric pressure.