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| PU spray systems from Krauss-Maffei PU spray processes are used to produce skins, coatings and high-quality surfaces. What are the advantages of spraying PU? The PU mix is discharged as a spray jet into the open mould. Only one mould half is necessary. The PU spreads evenly and rapidly over the whole area, resulting in short cycle times and high productivity. Krauss-Maffei offers different spray systems to cover the very wide application spectrum for PU spray processes, ranging from automotive interior trim elements and acoustic systems to stretchers, and rigid foam or sandwich panels for the furniture industry. Krauss-Maffei supplies application-specific machine solutions to match the requirements of different production processes. The new MK 2-2-AAS Pegasus mixing head, for example, is ideal for spraying smaller PU volumes at between 10 and 30 g/s. It is designed to produce a highly uniform spray pattern for very thin layers with constant thickness. The mixing head is engineered to ensure the PU components are mixed thoroughly and reliably. The isocyanate is injected vertically into two polyol streams, T mixing. This is a self-cleaning mixing head; no flushing required. Spray discharge is regulated by fan and horn air. The result is a precisely controlled spray pattern with no overspray. The MK 2-2-AAS Pegasus mixing head is used to produce high-quality surfaces on automotive door trim and centre console elements. It is also used to apply PU adhesive, for example, in laminating boards for the furniture industry. Krauss-Maffei also offers PU Spray Moulding as a solution for larger discharge volumes. For PSM, the 10P-2KV-PSM high-pressure linear mixing head is fitted with a special cap and nozzle. The compressed air that regulates the spray pattern is introduced into the viscous PU mix in the spray cap, ie, as the PU leaves the mixing head. This mixing head design can reliably deliver output as high as 150 g/s. It significantly improves cycle times, especially for large-area parts. Typical applications for PSM are sunroofs and boot covers for the automotive industry. Krauss-Maffei recently launched a wear-resistant, hard metal version of the PSM mixing head for spraying abrasive mixes with a high filler content. One important application for this version is spraying sound-damping PU layers with up to 70% barium sulphate filler load, for example, in the production of automotive acoustic components. write your comments about the article :: © 2005 Construction News :: home page |