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Binks Spray Tips July 2010 Surface Preparation - General Anything you dont want to see in the final finish must be removed from the surface Surface.

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Presentation on theme: "Binks Spray Tips July 2010 Surface Preparation - General Anything you dont want to see in the final finish must be removed from the surface Surface."— Presentation transcript:

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2 Binks Spray Tips July 2010

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4 Surface Preparation - General Anything you dont 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

5 Surface Preparation - Trash Defect

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

7 Introduction - Have we changed?

8 Coatings - Wet Film Thickness Gauge

9 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 77 o F

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

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

12 Viscosity - Cups Range Specifications Zahn 131- 60Ford 237 - 110 Zahn 219- 60Ford 323 - 110 Zahn 311 - 60Ford 416 - 120 Zahn 410 - 60 Zahn 510 - 60 All times in seconds Gardner Company

13 Viscosity - Cups Range Specifications Zahn 131- 60Ford 237 - 110 Zahn 219- 60Ford 323 - 110 Zahn 311 - 60Ford 416 - 120 Zahn 410 - 60 Zahn 510 - 60 All times in seconds Gardner Company

14 Viscosity - Timing

15 Atomization - External Mix Air Cap

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

17 Atomization - Internal vs External Mix Caps Internal External

18 Air Spray Guns - Three Ways To Feed Suction Feed Gravity Feed Pressure Feed

19 Air Spray Guns – Fluid Feed Types Suction Gravity Pressure

20 Air Spray Guns – Major Components

21 Atomization - Nozzle Combination

22 Atomization - Suction vs Pressure Feed Cap Suction Pressure

23 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)

24 Spray Gun Technique - Arcing

25 Spray Gun Technique – Too Far / Too Close

26 Spray Gun Technique - Gun Distances

27 Spray Gun Technique – Tilting the Gun

28 Spray Gun Technique - Vertical

29 Spray Gun Technique - Pattern Size

30 Spray Gun Technique - Open Work

31 Spray Gun Technique - Horizontal

32 Spray Gun Technique - Wide Mat'l

33 Spray Gun Technique - Corners

34 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

35 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

36 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)

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

38 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

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

40 Spray Gun Maintenance – Rule #1

41 Spray Gun Maintenance - Lubrication Use Spray Gun Lubricant

42 Spray Gun Maintenance - Air Cap

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