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Liquid Application Equipment Technology
Marty Powell Technical Systems SpecialistCarlisle Fluid Technologies
For over 125 years the DeVilbiss philosophy has been finding innovative solutions to spray finishing problems.
Founded in 1888 when Toledo, Ohio physician Dr. Allen DeVilbiss combined a bulb, some tubing and the base of an oil can to create the first atomizer for health care.
DeVilbiss is now the leading supplier of spray finishing equipment to the industrial and automotive refinish markets.
Specialized in high quality, innovative products for paint, mastic and adhesive handlingapplications.
Our expertise and knowledge comes from a long history in the field of paint circulatingequipment.
Dating back to 1890 when Joseph Binks introduced the first cold-water paint sprayingmachine.
Process Inventors
Ransburg, the acknowledged leader in electrostatic painting processes.
Harold Ransburg developed first electrostatic application system in 1940 with introduction of Ransburg No1.
Significant reductions in overspray, resulting in dramatic cost savings, reduced VOC emissions across a wide range of applications.
Process Inventors
Application Technology
Comparison of Technologies
What is Important
Why It is Critical
Transfer Efficiency
Finish Quality
Speed of Application
When You now The Above – Then You Can Design Your System
Transfer EfficiencyLo
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igh
Conventional -------------------------------- RotaryTra
nsfe
r E
ffic
ien
cy
Applicator Technology
Airless
HVLPAir Assist
LVMP
Conventional
Bell
E-Stat Gun
Fin
ish Q
uali
ty
Atomized Droplet Size
Finish QualityR
ou
gh -
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Fin
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Large -------------------------------------------- SmallAirless
Air AssistHVLP
LVMP
Conventional
Disk
Bell
E-Stat Gun
Atomized Droplet Size
Finish Quality
Malvern Particle AnalyzerMeasures Micron Size and Distribution of Particles Within A Given Area25 Microns = 1 Mil 40 Microns - Human Visibility Limit
20 Microns - “Good Finish”Appliance, Metal Office, Auto Interior
15 To 17 Microns - “Class A” Glamour FinishAuto Exterior, Aircraft, Bicycles, Etc.
Finish Quality
20 Microns or Less 20-30 Microns 30 Microns +
Rotary Atomization HVLP Turbine Airless
Air spray A/A Airless
HVLP Airless (Heated)
Sp
ee
d o
f A
ppli
cati
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Applicator Technology
Speed of ApplicationSl
ow
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Fast
HVLP ------------------------------------------ Airless
LVMP
Airless
Air Assist
HVLP
Conventional
Bell
E-Stat Gun
What Is Finish Quality
Finish Quality
Class “A”
Car Hood
Comparison of Finish Quality
What Is Finish Quality
Finish Quality
Class “B”
• Inside door frame
Comparison of Finish Quality
What Is Finish Quality
Finish Quality
Class “C”
• Under the Hood
Comparison of Finish Quality
Application Technology
Type of System Needed
To Design Your System
1. Type / Quality of the Finish Needed
2. Speed of the Application
3. Coating Type – Viscosity
4. Fluid Handling Equipment
These Items will Determine Systems You Should Consider
Air Atomization Technology
Air Velocity = Lowers TE
Air - Atomization Door Frames
Video
Air Atomization Technology
Conventional
◦ Spray at Any Pressure / CFM
◦ Air cap pressures typically 30 – 60 psi
HVLP
◦ Meets USA Regulatory Requirements
◦ Air cap pressure less than 10 PSI
◦ Requires air cap test kit
LVMP (TransTech, Compliant)
◦ Meets European Requirements
◦ Air cap pressures typically 20 – 40 psi
AeroBells and Conventional Spray Guns
Sometimes It Takes 2 Technologies
Video
Rotary AeroBell Provides Excellent TE
Air Spray Gun Paint Area’s of Faraday Cage Problems
Air Atomization Technology
This Type of Equipment is Used for Many Types of Materials• Paint• Mastics• Adhesives
Large Orifices Allow a Large Volume of Material
Thick Viscose MaterialsOr Low Viscosity Coatings
Large Selection of Nozzles to Allow Flow Control and Atomization of these Coatings with a Large Selection of Air Caps
Drawback – Overspray – Low Transfer Efficiency
Hydraulic (Airless) Atomization Technology
Airless
◦ Typically 1,000-4,000 psi.
◦ High flow capability.
◦ Used with a wide variety of coating materials.
Air Assisted Airless
◦ Typically 300-1,500 psi.
◦ Air used to improve spray pattern uniformity.
Airless Atomization Technology
Sound Deadener on Fuel Tanks
Airless Spray of Viscose Material
Video
Electrostatic Technology
Pure Electrostatic Atomization
Air Atomized Electrostatic Applicators
Air Assisted Airless Electrostatics Applicators
Centrifugal Atomization
Electrostatic Technology
Developed in the 1940’s
High voltage charge used to create ionized field.
Coating material negatively charged.
Charged particles attracted to grounded work piece.
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Electrostatic Technology
More Forgiving Application
Better Uniformity
Electrostatic “Wrap” As Opposed To “Line Of Sight”
Increased Transfer Efficiency◦ Decreased Coating Cost.
◦ Decreased Booth Maintenance.
◦ Decreased Emissions.
◦ Decreased Waste Disposal.
No Voltage“Line of Sight”
With Voltage
ElectrostaticTechnology
• Increased transfer efficiency
• The best way to reduce coating usage is to minimize the volume of material that is sprayed.
You pay for paint 4 times!◦ You pay somebody to buy it◦ You pay somebody to apply it◦ You pay somebody to clean it up◦ You pay somebody to dispose of it
Electrostatic Technology
All Forms of Atomization
Air Atomized Electrostatic Applicators
– Air is used to atomize coating material.
– Material flows over gun electrode and picks up electrostatic charge.
– Charged particles are attracted to grounded work piece.
– Particle velocity of 100 - 300 feet per second.
– Available in manual and automatic versions.
– Powder or Liquid Applicators.
Centrifugal (Rotary) Atomization
High speed rotary atomizers, utilize mechanical shearing action to atomize coatings materials.
Rotational speeds vary from 15,000 –100,000 rpm.
Centrifugal (Rotary) Atomization Technology
Bells operate at rotational speed of 12,000 - 100,000 rpm.
Disk operates at speeds of 6,000 - 40,000 rpm.
Serrated edge bell cup or disk aids in atomization process.
High transfer efficiency attributed to low particle velocity (20 - 60 feet per second) and electrostatic attraction.
Centrifugal (Rotary) Atomization
Automatically Painting Axles
Mask on EachWheel Hub
Video
Centrifugal (Rotary) Atomization
Fast Efficient Paint Application
For Coatings and Applications That Rely on Repeatable Performance
Video
Centrifugal (Rotary) Atomization
Minimal Overspray on Many Applications
Hard to See Paint Being Atomized
Wheels Change Color
Excellent TE and Finish
Video
Centrifugal (Rotary) Atomization Disk Technology
Centrifugal (Rotary) Atomization Technology
Comparison - Rotary & Air Atomization Technology
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Atomization Technology
Liquid Application Equipment Technology
Questions?
Thank you!
Liquid Application Equipment Technology
Marty Powell Technical Systems SpecialistCarlisle Fluid Technologies
