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The Important Temperatures To Control

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In this presentation, we will look at the various temperatures in the painting process and their relative importance with respect to improving finish quality outcomes

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The Important Temperatures To Control

  1. 1. THE IMPORTANT TEMPERATURES TO CONTROL (IN A PAINT APPLICATION PROCESS…) Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 1
  2. 2. • DESIGNERS AND MANUFACTURERS OF ADVANCED POINT-OF-USE TEMPERATURE AND VISCOSITY CONTROL SYSTEMS FOR INDUSTRIAL FLUID DISPENSING PROCESSES SINCE 1990 • SPECIALIZING IN BOTH RECIRCULATING AND “DEAD-END” SYSTEMS WITH MORE THAN 3500 ACTIVE INSTALLATIONS • LOW VISCOSITY (<1 CPS) TO HIGH VISCOSITY (>1,000,000 CPS) APPLICATIONS STANDARD AT PRESSURES FROM 0.4 BAR (5 PSI ) – 400 BAR (6000 PSI) Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 2
  3. 3. SO WHO CARES? • THOSE 3500+ TEMPERATURE CONTROL INSTALLATIONS INVOLVED SOME OF THE TOUGHEST APPLICATIONS IN PARTNERSHIP WITH DEMANDING CUSTOMERS LIKE: Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 3
  4. 4. PROCESS CONTROL IF THE PARAMETERS OF A PROVEN “PAINTING RECIPE” ARE HELD CONSTANT, THE RESULTING SURFACE FINISH WILL BE CONSISTENT AND REPEATABLE… Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 4
  5. 5. PROCESS TEMPERATURES TO CONTROL • BOOTH AIR • PAINT • SUBSTRATE • TURBINE AIR • SHAPING AIR • PURGE SOLVENT Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 5
  6. 6. BOOTH AIR TEMPERATURE • BELIEVED TO BE MOST IMPORTANT BY MANY • BASED ON BELIEF THAT PAINT TEMPERATURE = AMBIENT TEMPERATURE • SPEND MILLIONS OF DOLLARS IN CAPITAL AND OPERATING EXPENSE TO CONTROL • PAPER PRESENTED AT 2018 WATERBORNE SYMPOSIUM DEBUNKED THAT MYTH Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 6
  7. 7. AMBIENT IMPACT ON PARTICLE TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 7
  8. 8. AMBIENT IMPACT ON PARTICLE TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 8 A ir Temperature: 77.0 °F 25.0 °C Inlet Paint Temp: 90.0 °F 32.2 °C
  9. 9. AMBIENT IMPACT ON PARTICLE TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 9
  10. 10. AMBIENT IMPACT ON PARTICLE TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 10 min max min max Partic le ΔT: -2.301 -1.068 -0.767 -0.230 °F Partic le Temp at Part: 87.70 88.93 89.23 89.77 °F Bell Gun
  11. 11. PAINT TEMPERATURE • PAINT TEMPERATURE INVERSELY AFFECTS VISCOSITY • HIGHER TEMPERATURE = LOWER VISCOSITY • LOWER TEMPERATURE = HIGHER VISCOSITY • THIS AFFECTS: • FLOW OUT • FLASH OFF • RUN & SAG • MORE IMPORTANT THAN AMBIENT TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 11
  12. 12. (Valspar - 080 White Polyester) Data Courtesy of Alsco Metals Corporation 10 15 20 25 30 35 40 45 50 55 60 15 20 25 30 35 40 Temperature (°C) Viscosity (Zahn#4Seconds) PAINT VISCOSITY VS. TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 12
  13. 13. SUBSTRATE TEMPERATURE • SUBSTRATE VARIES • METAL, PLASTIC, COMPOSITE, WOOD, ETC. • ORDERS OF MAGNITUDE GREATER MASS THAN PAINT FILM • HAS SIGNIFICANTLY GREATER INFLUENCE ON PAINT THAN AMBIENT • MOST IMPORTANT TEMPERATURE OF ALL Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 13
  14. 14. SUBSTRATE TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 14
  15. 15. TURBINE AIR TEMPERATURE • OFTEN NEGLECTED • COMPRESSED AIR GETS COLD WHEN RELEASED • CAUSES CONDENSATION WHEN IT FALLS BELOW THE DEW POINT • DEW POINT IS HIGH IN BOOTH DUE TO HIGH HUMIDITY • CONDENSATION CAN CAUSE • PAINT DEFECTS • EQUIPMENT FAILURE • MAKES THIS MORE IMPORTANT THAN BOOTH AIR Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 15
  16. 16. SHAPING AIR TEMPERATURE • OFTEN NEGLECTED • SAME COMPRESSED AIR SOURCE AS TURBINE AIR • IT GETS COLD, TOO • CAUSES CONDENSATION WHEN IT FALLS BELOW THE DEW POINT • THIS CONDENSATION IS EVEN MORE PRONE TO CREATING PAINT DEFECTS • MORE INFLUENCE ON PAINT THAN BOOTH AIR • CAN BE MUCH COLDER • MAKES THIS MORE IMPORTANT THAN BOOTH AIR Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 16
  17. 17. PURGE SOLVENT TEMPERATURE • PURGE SOLVENT IS REGULARLY RUN THROUGH THE ATOMIZER • IT IS OFTEN AT TEMPERATURES WELL BELOW OPTIMAL PAINT TEMPERATURE • IT COOLS ALL OF THE PAINT PASSAGES IN THE PROCESS • THIS AFFECTS THE NEXT PARTS BEING PAINTED Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 17
  18. 18. LONG TERM TEMPERATURE VARIATION Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 18 >8°F Paint Purge
  19. 19. PAINTING AND PURGE TEMPERATURES Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 19 Idle Time
  20. 20. THE NEW HIERARCHY OF IMPORTANCE • SUBSTRATE • PAINT • PURGE SOLVENT • SHAPING AIR • TURBINE AIR • BOOTH AIR Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 20
  21. 21. THANK YOU!! PLEASE COME SEE US AT: www.viscosity.com AND VISIT OUR BLOG AT: blog.viscosity.com/blog AND OUR YOUTUBE CHANNEL: https://www.youtube.com/channel/UCVyAgTJtgNZTozqFeBc CeNA Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 21

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