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Binks Spray Tips

Binks Spray Tips. July 2010. 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

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Binks Spray Tips

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  1. Binks Spray Tips July 2010

  2. 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

  3. Surface Preparation - Trash Defect

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

  5. Introduction - Have we changed?

  6. Coatings - Wet Film Thickness Gauge

  7. 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

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

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

  10. Viscosity - Cups Range Specifications Zahn 1 31- 60 Ford 2 37 - 110 Zahn 2 19- 60 Ford 3 23 - 110 Zahn 3 11 - 60 Ford 4 16 - 120 Zahn 4 10 - 60 Zahn 5 10 - 60 All times in seconds Gardner Company

  11. Viscosity - Cups Range Specifications Zahn 1 31- 60 Ford 2 37 - 110 Zahn 2 19- 60 Ford 3 23 - 110 Zahn 3 11 - 60 Ford 4 16 - 120 Zahn 4 10 - 60 Zahn 5 10 - 60 All times in seconds Gardner Company

  12. Viscosity - Timing

  13. Atomization - External Mix Air Cap

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

  15. Atomization - Internal vs External Mix Caps Internal External

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

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

  18. Air Spray Guns – Major Components

  19. Atomization - Nozzle Combination

  20. Atomization - Suction vs Pressure Feed Cap Suction Pressure

  21. 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)

  22. Spray Gun Technique - Arcing

  23. Spray Gun Technique – Too Far / Too Close

  24. Spray Gun Technique - Gun Distances

  25. Spray Gun Technique – Tilting the Gun

  26. Spray Gun Technique - Vertical

  27. Spray Gun Technique - Pattern Size

  28. Spray Gun Technique - Open Work

  29. Spray Gun Technique - Horizontal

  30. Spray Gun Technique - Wide Mat'l

  31. Spray Gun Technique - Corners

  32. 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

  33. 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

  34. 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)

  35. 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.

  36. 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

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

  38. Spray Gun Maintenance – Rule #1

  39. Spray Gun Maintenance - Lubrication Use Spray Gun Lubricant

  40. Spray Gun Maintenance - Air Cap

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