Munich, July 2, 2009 - Italian PUR processor Ruberti will soon be producing PUR skins using new spray technology from KraussMaffei. The versatile process delivers very high surface quality even for parts with complex geometries. Further advantages are short cycle times and the significantly lower mould costs.
Ruberti specializes in production of PUR cladding and trim elements used in a very wide range of products, from commercial vehicles and sports equipment to air conditioning systems, medical and other equipment. In all these applications, the parts must meet exacting mechanical specifications. At the same time, customers expect surfaces that look good, have a pleasant feel and meet abrasion-resistance criteria.
A one-step process and lower mould investment
These types of products provide a striking illustration of the process advantages of PUR skin spraying. The carefully controlled spray process delivers surfaces with a very high quality look&feel. Combining skin spraying with in-mould painting (IMP) results in a one-step process capable of producing quality parts with high-gloss paint surfaces. IMP is far cheaper than a post-mould paint process. Mould costs are also significantly lower because the material is spayed into an open mould, so that only one mould half is needed and no sophisticated and expensive locking system is required.
KraussMaffei's MK 2.0-2K-S-L mixing head delivers the polyurethane without admixture of air, using a spray nozzle developed especially for this process. Important advantages of this spraying method are the uniformity of the spray layer and minimal overspray. The mixing head is fitted with a lance to spray accurately even into awkward and inaccessible areas. This makes it possible to produce spray skins with complicated, three-dimensional geometries.
Gentle processing and high product quality
With precise temperature control all the way from the metering machine to the mixing head, the system guarantees gentle, non-destructive processing of the material and hence consistently excellent product quality. The flexibility and versatility of the new system will ensure that Ruberti is strongly positioned to meet escalating criteria for PUR products. This project once more illustrates the expertise and reliability of KraussMaffei as a supplier of solutions for PUR spraying.
KraussMaffei's MK 2.0-2K-S-L mixing head
EPS-Download: MK 2.0-2K-S-L.eps (580.3 kB)