1. Binks Spray Tips
July 2010

3. Surface Preparation - General
Anything you don’t want to see in the final finish must be removed from the surface
Surface must be clean
Lint Dirt Oil
Contaminant
Substrate determines pretreatment
The greatest single cause of paint failure is
poor surface preparation

4. Surface Preparation - Trash Defect

5. Introduction - Why Spray?
Increase Quality
Increase Production
Reduce Costs - Paint and Labor
Government Regulations
Coatings Change
Maintenance Reduction

6. Introduction - Have we changed?

7. Coatings - Wet Film Thickness Gauge

8. Viscosity - Characteristics
The Property Of Liquid Which Enables It To Resist Flow
Measured By The Time Required For A Given Volume Of Liquid To Flow Through A Small Hole In The Bottom Of A Metal Cup Under Controlled Conditions.
Standardized at 77o F

9. Viscosity - Cups Accuracy Is Best In Middle Of Cups Range
Types Of Cups
Ford
Fischer
Zahn
DIN
Others

10. Viscosity - Cups Accuracy Is Best In Middle Of Cups Range
Types Of Cups
Ford
Fischer
Zahn
DIN
Others

11. Viscosity - Cups Range Specifications
Zahn Ford
Zahn Ford
Zahn Ford
Zahn
Zahn
All times in seconds Gardner Company

12. Viscosity - Cups Range Specifications
Zahn Ford
Zahn Ford
Zahn Ford
Zahn
Zahn
All times in seconds Gardner Company

13. Viscosity - Timing

14. Atomization - External Mix Air Cap

15. Atomization - Air Cap Ratings
Type
Pressure
Suction
Finish Material
Viscosity
Flow Rate
Operating Pressure Range
Air Volume (CFM) Required

16. Atomization - Internal vs External Mix Caps
Internal External

17. Air Spray Guns - Three Ways To Feed
Suction Feed
Gravity Feed
Pressure Feed

18. Air Spray Guns – Fluid Feed Types
Suction Gravity Pressure

19. Air Spray Guns – Major Components

20. Atomization - Nozzle Combination

21. Atomization - Suction vs Pressure Feed Cap
Suction Pressure

22. Atomization - Air Cap Selection
Volume of air (CFM) available
Material feed system: suction or pressure
Type and volume of material to be sprayed
Size of fluid tip
Size and nature of object being sprayed
(Pattern size)

23. Spray Gun Technique - Arcing

24. Spray Gun Technique – Too Far / Too Close

25. Spray Gun Technique - Gun Distances

26. Spray Gun Technique – Tilting the Gun

27. Spray Gun Technique - Vertical

28. Spray Gun Technique - Pattern Size

29. Spray Gun Technique - Open Work

30. Spray Gun Technique - Horizontal

31. Spray Gun Technique - Wide Mat'l

32. Spray Gun Technique - Corners

33. Troubleshooting - Spray Gun
Fluid Leaking from Packing Nut
Packing nut loose
Packing worn or dry
Air leaking from front of gun
Sticking air valve stem
Foreign matter on air valve or seat
Worn or damaged air valve or seat
Broken air valve spring
Bent valve stem
Air valve gasket damaged or missing

34. Troubleshooting - Spray Gun
Fluid Leaking from Front of Gun
Packing nut too tight.
Fluid tip or needle worn or damaged
Foreign matter in tip
Fluid needle spring broken
Wrong size needle or tip
Dry packing

35. Troubleshooting - Spray Gun
Fluttering
Material Level Low
Fluid Passage Obstruction
Loose or damaged fluid tip/seat
Dry or loose needle packing
Material too heavy (suction)
Air vent clogged (suction)

36. Troubleshooting - Patterns
Right/Left - Top/Bottom Heavy
Reverse the air cap 180o. If the problem reverses, the problem is with the air cap. If not, the problem is with the fluid tip/needle.

37. Troubleshooting - Patterns
Center Heavy
Spreader adjustment in too far
Atomizing pressure too low
Fluid pressure too high
Fluid tip incorrect size for material and flow

38. Troubleshooting - Patterns
Split Pattern
Fluid needle adjustment in too far
Atomization air too high
Fluid pressure too low

39. Spray Gun Maintenance – Rule #1

40. Spray Gun Maintenance - Lubrication
Use Spray Gun Lubricant

41. Spray Gun Maintenance - Air Cap