We proposed the PR-40, which is our model with the widest spraying capability. The PR-40 features two adjusters – one for atomizing air pressure and one for pattern air pressure – so its mist can be fine-tuned. For this application, the atomizing air pressure was set relatively low for an adhesive to prevent overspray, while
the pattern air pressure was set high to ensure the spray pattern was wide enough.
- (Spraying conditions)
- Atomizing air pressure: Approximately 0.08 to 0.18 MPa
- Pattern air pressure: Approximately 0.15 to 0.25 MPa
- Liquid pressure: 0.15 MPa (using pressure feed tank)
- Target distance: 300 mm
As a result, the PR-40 pattern width was increased by 30% to 40% compared to their old spray gun, allowing them to coat an area over 200 mm wide with a single spray gun.
We also solved the issue of the adhesive partially drying in midair, and by setting the atomizing air pressure relatively low, overspray was no longer an issue, greatly improving the work environment.