A supplier of automotive components including engine mounts, Delphi's new process provides two key benefits: it improves the reliability of the bond and it employs waterborne adhesive technology, helping to preserve the environment. The rubber-to-metal adhesive is applied as a two-part system requiring a primer followed by a top coating. Both coatings must be applied and dried properly within a narrow process window.
After heating the parts to 160°F (71°C) in an electric convection oven, the parts are precisely sprayed at a highly automated spray station. Because only some surfaces of each mount are coated, Nutro selected an HVLP spray gun with a special rotating head. Nutro verifies the primer has been applied properly using its Spray-i system.