Hennecke GmbH, a German company based in Sankt Augustin near Bonn, has newly developed a brand new technology called Polyurethane-Composite-Spray-Molding (PURCSM) for PU (polyurethane) processors.
For the very first time a new type of system allows hand-operated spray application, thus making the advanced polyurethane spray technology interesting for processors who laminate GRP in small series by hand. A novelty which offers the end consumer real added value and which can also convince in production as it uses neither solutions containing solvents nor explosion protection zones (ex zones).
PUR-CSM enables glass-fiber reinforced components or composite moldings to be made from PU systems in a PU spraying process. Due to the continuous further development of the spray technology and the associated identification of more and more fields of use, polyurethanes are now moving into typical GRP applications. The use of PUR-CSM fulfills the highest demands with regard to flexibility in production, reproducible component quality and efficient material input.
Decisive for manual processing is a new 3-component spray mixhead with individually connectable glass fiber feed. In the hand-operated spraying process, the mixhead with its compact dimensions and its relatively low weight enables ergonomically correct handling for the machine operator. This means that longer operations, e.g. when manufacturing large components or great numbers, are no longer a problem. Thanks to the optional adaptation of spray lances which allow PU application at angular positions of 45° or 70°, even the reinforcement of complex shape geometries or undercuts is considerably faster and simpler than is the case when processing glass fiber reinforced plastics.
However, the mixhead not only enables a targeted reinforcement with cut glass fibers. In combination with high pressure polyurethane metering machine technology and its three-component design, the hand-operated PUR-CSM version is also suitable for direct application of various polyurethane foam layers (sandwich construction). This ensures, optimal amongst other things, thermal insulation and improved acoustic component properties in the form of clearly reduced acoustic emissions.
Source: plastics.2456.com
