Surface Technology - Overview of Electrostatic Painting and Coating Technologies

8/6/2019 Surface Technology - Overview of Electrostatic Painting and Coating Technologies

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TS016 Surface Technology Overview of Electrostatic Painting and Coating Technologies

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Surface Technology

Overview of Electrostatic Painting and Coating Technologies

Technical OverviewDocument ID:OTS016Dated: 2011-07-07Status: Draft

Distribution: External:

Copyright 20011, OTSON Technologies Corp All rights reserved.

This document is protected by national and international copyright and other laws. Unauthorised storage, reproduc-tion, transmission and/or distribution of this document, or any part of it, may result in civil and/or criminal proceedings.

OTSON are trade marks of OTSON Technologies Corp and may be registered in certain countries. All other productnames referred to in this document may be trade marks of their respective owners.

This document is issued subject to contract and accordingly nothing in this document shall constitute or be construedas constituting an offer, obligation or an acceptance of any offer previously made. Any contract following on this docu-

ment shall be in the standard form OTSON Technologies Corp


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OTS016 Surface Technology Overview of Electrostatic Painting and Coating Technologies

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IntroductionOTSON focus on liquid electrostatic technology, we provide many liquid electrostatic equipment forcustomers. We also provide various nozzles and spray disks.1.Turbo Rotary Atomizer2.Paint Dosing Pump3.Manual Liquid Electrostatic Spray Gun4.Disk Electrostatic Automatic Coating System5.Special Nozzles

6.High Atomization Spray Disks

The principles of electrostatic charging apply equally to liquid and powder coatings. In electrostaticcoating, the uid is atomized, then negatively charged to the object, thus having a less negative

charge than the paint. Increased transfer efciency is achieved, up to 95%. For instance, it is pos-sible to spray paint a cyclone fence electro statically with fair transfer efciency. Both sides of the

fence can be painted from only one side due to the electrostatic attraction.

Atomized paint droplets are charged at the tip of the spray gun by a charged electrode; the elec-trode runs 30 to 140 kV through the paint at 0 to 225 microamperes. So, it is mean that the electri-

cal force needed to guide paint particles to the work piece is 8,000 to 10,000 volts per inch of air.

Figure 1 . Disk Electrostatic Automatic Coating system


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The Spray Direction of OTSON Twin-Turbine Rotary Atomizer

Twin-Turbine Rotary Atomizer

MAX 60000RPM(no loaing disk)

Fast Colour Change Solution ( 1 sec )

Pump 1 Pump 2

Paint Tank 1

Paint Tank 2

Spray Tube 1

Spray Tube 2

Twin-Turbine Rotary

Atomizer


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The principle of Turbo Rotary Atomizer (DISK) for Electrostatic Coating

Rotary atomization is a variation of electrostatic spraying that uses centrifugal force generated bydiscs to atomize paint, which drives it from the spray disk. In this case, the expelling effect appearsbetween the paint carrying electrostatic and the live particles as to cause further atomization of

paint and thus, forming much ner thin fog. Due to the occlusion of electrostatic, the lost paints

are sucked back to the workplace in generating a kind of surrounding electrostatic effect andthe over spraying phenomenon is thus minimized. In this way, the atomization of this method isexcellent as is the transfer efciency. This method also can be used with paints of different viscos-ity. Therefore the machine has achieved the purpose of electrostatic coating.


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Application - Bicycle

Primer Coating

Final Coating


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The principle of Manual Liquid Electrostatic Spray Gun for Electrostatic Coat-ing

In using the liquid electrostatic spray gun , the high compress air tends to throw the paint away

when the paint passes through the special nozzle, the droplets pick up the charge from an elec-trically charged electrode at the tip of the gun by a charged electrode. The charged particles aregiven their initial momentum from the uid pressure/air pressure In this case, the expelling effect

appears between the paint carrying electrostatic and the live particles as to cause further atomi-zation of paint and thus, forming much ner thin fog. Due to the occlusion of electrostatic, the lost

paints are sucked back to the workplace in generating a kind of surrounding electrostatic effectand the over spraying phenomenon is thus minimized. In this way, the machine has achieved thepurpose of electrostatic coating.

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Air PoweredDouble Diaphragm Pump

Air Compressor

Paints Supply Line

Air Supply Line

Paint Tank

Electrostatic Power Supply

Ground

AC 110 ~ 240 vAC 110 ~ 240 v

Object

HighVoltage Cable

Air Hose

Spray Gun

Spray Booth

Air Dryer

Earthing Cable

Conveyor

Small Particle Atomization

+

Round Tin Nozzle Round (FRP) Nozzle Flat (FRP) Nozzle

OTS-3000 Manual Liquid Electrostatic Spray System


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Features-OTS-3000 Manual Electrostatic Spray Gun Dual Coating-Solvent and Waterborne Paint

Improve Coating Quality

Reduce Air Pollutions

Reduce Water Pollutions

High Transfer Efciency - Spray Painting

High Atomized Nozzle

Easy Handle for Long Term Operation

Long Life Operation

Low VOC Emissions

Low Failure Rate and Easy Maintenance

Light Weight Gun - 470g Only

The Spray Direction of High Atomized Nozzle


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Sports Equipment

Handcraft Computer

Housing

StationeriesWooden Furniture

Hardware

Lockers

Freezers

Iron Railing

Display Cases

Refrigerators

Heavy Machinery

Ofce Equipment

Ofce Partitions

Medical Equipment

Restroom Partitions

Roller BarsMetal Doors

Decorative Lamps

Electrical Home Appliances

Car Accessories, Teon Pot

Sports Equipment

Handcraft

Files

Desks

Small parts

Bicycle

Application

Small partsBicycle

Computer Housing

Stationeries

Wooden Furniture

Hardware

Lockers

Freezers

Iron Railing

Display Cases

Electrostatic Spray Coating and Painting

Liquid Coating ,Waterborne Coating ,Metal Coating ,Wood Coating ,Plastic Coating

Advantages of Electrostatic Coating

Improvements in transfer efciency can lead to less paint waste and lower emissions of VOCs.

Transfer efciency depends on a large number of parameters. Some of these parameters are un-

der the control of the operator, while others are not. For example, the Spray technology .We can

see the chart that why electrostatic is better than others

Liquid Electrostatic Coating Application


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In the case, our products transfer efciencies range from 70 % to 95 %( normal case), it means

that you can save your money in paint cost. Meanwhile; Excellent edge coverage is achieved be-

cause electrons are attracted more strongly to edges than to at surfaces, the attractive forces of

electrostatics will to some extent draw paint droplets around to the back side of the parts, a phe-

nomenon called wraparound or wrap.As for coating thickness issue, it forms an electrically insulat-ing layer. Additional paint droplets are attracted most strongly to areas on the part where ground-ing is best, that is, the spots where paint is thinnest, result in a more even lm thickness.

The OTSON DISK Electrostatic Spray System and Manual Liquid Electrostatic Spray Gun can

signicantly improve the spraying quality and production while reducing the paint consumption, the

waste discharge and the maintenance cost. Because of the highly atomized live paint grains, the

lm is uniformly and smoothly coated on the workplace which has reduced the orange tissue effect

and improved the coating layer quality.

ROI ( Return of Investment ) for Using DISK Electrostatic Coating Equipment

in Bicycle Spray Painting Application.

Working Hours: 8 hours / per dayProduction Conditions : 1000 Bicycles / per day

Application : Bicycle Primer and Finishing Spray Painting

Disk System : 2 Disk Systems

Conveyor speed : 5 meters

A. Paint cost per liter USD 5

B. Paint consumption per week 958 liter

C. Paint cost per week (A x B) USD 4,790

D. Efciency saved by using OTSON Auto DISK Coating System 50%

E. Paint saved(C x D = Cost saved per week ) USD 2,395

F. Primer and Finishing(E x 2 = 2 layers painting cost saved per week )

USD 4,790

G. Total paint cost saved per year( F x 52 weeks) USD 249,080


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Conclusion

The cost spent on buying one set of DISK electrostatic Coating Machine. With some investment,you can cut off huge costs required for paint and the technician while increasing your production

and improving product quality. Abiding by human-based spirit, the ultimate goal of manufactur-ing the DISK Electrostatic Automatic Coating Machine is to efciently use the energy, improve the

quality and protect the environment.

Our equipment of liquid electrostatic coating can signicantly improve the coating quality and

production while reducing the paints consumption, the waste discharge and the main-

tenance cost. Because of the highly atomized live paint grains, the lm is uniformly and

smoothly coated on the workplace which has reduced the orange tissue effect and improved thecoating layer quality.

Further Information

For more information, go to www.otson.com

For further information on OTSON s electrostatic products, please contact:

OTSON Technologies Corp.

e-mail : [email protected]

Address : 1F., No.20, Ln. 211, Huacheng Rd., Sinjhuang Dist.,

New Taipei City 242, Taiwan (R.O.C.)

Tel : 886+2+2659-7162 Fax : 886+2+2656-0287

*The appearance of all products, detail, gure and specication are subject to change at any time without notice.

Copyright 2011 OTSON is a registered trademark of OTSON Technologies Corp. All other names and brands may bedaimed as the property of others.

Surface Technology - Overview of Electrostatic Painting and Coating Technologies

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