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The Impact of Temperature On Spray Pattern

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In this presentation, we will demonstrate the impact of temperature-based viscosity variations on spray patterns.

Published in: Devices & Hardware
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The Impact of Temperature On Spray Pattern

  1. 1. THE IMPACT OF TEMPERATURE ON SPRAY PATTERN 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. (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) SOLVENTBORNE COATINGS Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 4
  5. 5. Data Courtesy of Sherwin-Williams Corporation TEMPERATURE VS. VISCOSITY BY COLOR Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 5
  6. 6. SPRAY COATING Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 6
  7. 7. BASIC CONFIGURATION Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 7
  8. 8. • 16°C - 5.8mm 21°C - 7.3mm 27°C - 8.9mm 32°C - 9.7mm 38°C - 10.4 18.3C 203mm 40.6C 394mm 37.8C 375mm 35.0C 356mm 32.2C 337mm 29.4C 318mm 26.7C 286mm 23.9C 254mm 21.1C 229mm Heavy Edges Uneven Coating Thin, Uneven Coating Heavy Edges Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 8
  9. 9. THE EFFECT OF UNEVEN FILM BUILD Substrate Slower Cure Faster Cure Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 9
  10. 10. THE EFFECT OF UNEVEN FILM BUILD Blisters/Uncured Coating Substrate Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 10
  11. 11. CORRECTING UNEVEN FILM BUILD Even Cure STRIPSTRIPSubstrate Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 11
  12. 12. THE GOAL THE GOAL IS TO STABILIZE AND OPTIMIZE THE VISCOSITY OF THE COATING MATERIAL AT THE POINT OF USE WHICH, IN SPRAY SYSTEMS, IS THE NOZZLE ORIFICE…
  13. 13. THERMAL LOSS • NO GAPS ALLOWED IN TEMPERATURE CONTROL ENVELOPE • GRAPH FOR STAINLESS STEEL DISPENSE VALVE IN AMBIENT • OK IN CONTINUOUS OPERATION • 10 MINUTE PAUSE IN AMBIENT CREATES A SIGNIFICANT VISCOSITY CHANGE IN THE MATERIAL Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 13
  14. 14. SPRAY PATTERN IMPACT • CHANGE IN SPRAY PATTERN CAUSED BY CHANGE IN VISCOSITY RESULTING FROM DIFFERENCES IN MATERIAL TEMPERATURE • FIXED ORIFICE • CONSTANT PRESSURE • CONSTANT PATH AND SPEED • UNACCEPTABLE RESULTS • NO DIFFERENCE BETWEEN ROBOT AND OPERATOR Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 14
  15. 15. POINT-OF-APPLICATION • TO PRODUCE THE PERFECT BEAD OR SPRAY PATTERN, IT IS ESSENTIAL TO DISPENSE THE SEALER OR ADHESIVE AT EXACTLY THE RIGHT VISCOSITY • THIS MEANS CONTROLLING THE TEMPERATURE OF THE MATERIAL AS IT IS BEING DISPENSED Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 15
  16. 16. 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 16

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