Several advantages are claimed for a new high-pressure spray mixing head for production of sandwich parts.

Several advantages are claimed for a new high-pressure spray mixing head for production of sandwich parts. Luchs II from Krauss-Maffei Corp., Florence, Ky., utilizes a flat-fan nozzle without air infusion to spray the PUR mix. The result is said be uniform material distribution, minimal overspray, and a well-defined spray edge. This mix head is available in two sizes, which cover the output range of 20 to 150 g/sec. Spray cone widths up to 1 meter are possible, so that even large parts can be rapidly coated. After each spray cycle, automatic air cleaning removes PUR residues from the head. This automated air purge is said to speed up the cleaning step and suit the unit to processing high-speed PUR systems. Key applications are automotive structural parts-roof modules, rear package shelves, or cargo trays-made as sandwich elements with a honeycomb core between fiberglass mats. The PUR mix is discharged onto the fiberglass mat, producing very thin PUR layers for low weight per unit area.

Krauss-Maffei
Reaction Process Machinery
7095 Industrial Rd. PO Box 6270
Florence, KY 41022-6270
Phone (606) 283-0200 Fax (606) 283-0311