Munich, Germany -- Italian polyurethane processor Ruberti will soon be producing PU skins for products such as automotive cladding and trim, using new spray technology from x, the German company said, in a 2 July press statement.
According to KraussMaffei, "the versatile process delivers very high surface quality even for parts with complex geometries," with further advantages including short cycle times and significantly lower mould costs.
Ruberti specialises in production of polyurethane cladding and trim for a wide range of products, from commercial vehicles and sports equipment to air conditioning systems, medical and other equipment, said KraussMaffei.
In all these uses, the parts must meet exacting mechanical specifications but also, customers expect surfaces that look good, have a pleasant feel and meet abrasion-resistance criteria.
These types of products provide a striking illustration of the process advantages of sprayed polyurethane skins. A carefully controlled spray process delivers surfaces with a very high quality look and feel, said KraussMaffei. Meanwhile, combining skin spraying with in-mould painting (IMP) results in a one-step process giving quality parts with high-gloss paint surfaces.
"IMP is far cheaper than a post-mould paint process," adds the machinery maker. It describes mould costs as "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. Advantages here are a uniform spray layer and minimal overspray. The mixhead is fitted with a lance to allow accurate spraying into hard-to-access areas, making spray skins with complicated, three-dimensional geometries possible.