In this presentation, we will demonstrate the impact of temperature-based viscosity variations on some of the most common sealer defects.

1. THE IMPACT OF TEMPERATURE
ON COMMON SEALER DEFECTS
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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)
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3. SO WHO CARES?
• THOSE 3500+ TEMPERATURE CONTROL INSTALLATIONS
INVOLVED SOME OF THE TOUGHEST APPLICATIONS IN
PARTNERSHIP WITH DEMANDING CUSTOMERS LIKE:
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4. ROBOTIC SEALER
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5. COMMON DEFECTS
Tail-offThin Bead Start
Blob
End
Blob
Heavy
Bead
Slumping
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6. THE RESULT
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7. THE FUNDAMENTALS
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8. TYPICAL VISCOSITY VS. TEMPERATURE CURVE
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9. 18C
203mm
41C
394mm
38C
375mm
35C
356mm
32C
337mm
29C
318mm
27C
286mm
24C
254mm
21C
229mm
16°C - 5.8mm
21°C - 7.3mm
27°C - 8.9mm
32°C - 9.7mm
38°C - 10.4
DISPENSE PATTERN VS.
TEMPERATURE
• ORIFICE, PRESSURE, SPEED, DISTANCE, AND
ANGLE TO SURFACE HELD CONSTANT
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10. •
18C
203mm
41C
394mm
38C
375mm
35C
356mm
32C
337mm
29C
318mm
27C
286mm
24C
254mm
21C
229mm
16°C - 5.8mm
21°C - 7.3mm
27°C - 8.9mm
32°C - 9.7mm
38°C - 10.4mm
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11. •
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12. •
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
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13. 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
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14. THE GOAL
THE GOAL IS TO STABILIZE AND OPTIMIZE THE
TEMPERATURE OF THE SEALER OR ADHESIVE AT
THE POINT OF APPLICATION WHICH, FOR MOST
SYSTEMS, IS THE NOZZLE ORIFICE…
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15. 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
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