THE BUSINESS OF VISCOSITY BLOG



    Where Do You Control Material Temperature?

    Posted by Mark Portelli

    Jan 15, 2020 12:45:00 PM

    We are fortunate to get the opportunity to tour many manufacturing plants and review a large variety of dispensing processes. One thing that really stands out is that most companies do a good job dispensing. Whether it’s a manual dispensing operation with skilled and experienced operators or an automated dispense with highly repeatable motions, in general, the companies we see are already doing a good job.
    When we’re out there, we often hear that either the booth or the plant are already temperature controlled. Often, this is said as if it eliminates the requirement for material temperature control. While definitely an improvement over no control, simply controlling the temperature of your booth and your plant, may not be enough to accomplish your quality and cost objectives.

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    Topics: Fluid dispensing systems, automotive painting, industrial painting, paint temperature control, automotive paint finishing, automotive finishing

    WE’RE NOT THE PAINT HEATER COMPANY!

    Posted by Ian Porzondek

    Jan 8, 2020 8:15:00 AM

    We hear this a lot, “Oh, you’re the paint heater company.” We tend to cringe because what we do is quite a bit different than traditional paint heaters.

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    Topics: cost of temperature, Fluid dispensing systems, Temperature control, Point of Application, paint and coating, Industrial finishing, temperature control systems

    Why Efflux Cups Should not be Used for Process Control

    Posted by Mark Portelli

    Dec 18, 2019 10:47:00 AM

     

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    Topics: Zahn cups, Efflux Cups, coating, viscometers, flexographic printing, gravure printing, viscometry, non-newtonian fluids, ink management

    Are Batch-to-Batch Paint Variations Self-Inflicted?

    Posted by Rob Gladstone

    Dec 11, 2019 11:04:00 AM

    At an event recently, we struck up a conversation with an Account Manager at one of the major paint suppliers. During our conversation we discussed the batch-to-batch variation of the paints they supply. He said what we often hear from paint suppliers, “Our paints don’t vary much from batch to batch.” When we asked why their customers often have a different perception he said, “Most of the variations that they see are self-inflicted.” That prompted us to request a more in-depth conversation so we could better understand how end users may be unknowingly creating their own batch variations. We thought his insights were helpful, so we decided to share a summary of them here.

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    Topics: painting, automotive painting, industrial painting, temperature control systems, Paint Temperature Control Series, robotic painting, paint temperature control, paint surface finish, automotive paint finishing

    Can Temperature Change Disrupt My Fixed Displacement Dispensing System?

    Posted by Mike Bonner

    Dec 4, 2019 9:50:00 AM

    In this series we’ve been discussing the impact of changes in fluid properties, specifically viscosity, on the performance of robotic fixed displacement dispensing systems.  In the first installment, “Fixed Displacement Dispensing Doesn’t Guarantee Fixed Results”, we examined common dispensing defects, contrasting those that can be readily addressed through the implementation of a robotic fixed displacement dispensing system, and those that are the result of changes in physical fluid properties, which prove to be more resilient.

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    Topics: Viscosity, Manufacturing, Fluid dispensing systems, Point of Application, fluid process control, Can / Container, viscometry, temperature control systems

    Why Robotic Fixed Displacement Dispensing Systems Can’t Guarantee Consistent Bead Profiles

    Posted by Mike Bonner

    Nov 20, 2019 1:05:00 PM

    In our last segment, Fixed Displacement Dispensing Doesn’t Guarantee Fixed Results, we examined how viscosity variation impacts your robotic fixed displacement dispensing system and the many defects that can still exist, even in the most highly advanced of these systems.  In this installment, we look more closely at the phenomenon of bead profile, it’s importance to the quality of your end product, and why simply controlling path, dispense rate, and total volume does not guarantee that your process will produce consistently high-quality parts.

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    Topics: Manufacturing, Fluid dispensing systems, Temperature control, Point of Application, Can / Container, automotive, temperature control systems

    Fixed Displacement Dispensing Doesn’t Guarantee Fixed Results

    Posted by Mike Bonner

    Nov 13, 2019 9:39:00 AM

    It has become commonplace to employ fixed displacement systems when dispensing mid-to-high-viscosity fluids like sealers and adhesives.  It makes sense.  Proper performance in these applications hinges on making sure that the right amount of sealer or adhesive is dispensed in the right place on every part.  When coupled with a robot to assure that path, speed, distance and angle to part are consistent and repeatable, it is easy to believe that the dispense job will be perfect every time.

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    Topics: Manufacturing, Point of Application, fluid process control, automotive, temperature control systems, automotive finishing

    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part III

    Posted by Mike Bonner

    Aug 13, 2019 4:14:00 PM

    In Part II of this series, we continued our discussion on viscosity by tackling the topic of thixotropy.  With this defined, we can now circle back to bring it all together and show how different measurement methods produce different results and how our measurement choices can actually work against us.

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part II

    Posted by Mike Bonner

    Aug 6, 2019 3:38:00 PM

    In Part I of this series, we examined some of the issues with the viscosity cup measurement process and started to look at the fundamentals of fluid viscosity as a means of explaining the source of those problems.  In this installment, we pick up the discussion with a somewhat difficult topic:  thixotropy.

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part I

    Posted by Mike Bonner

    Jul 30, 2019 10:28:00 AM

    Manufacturers who dispense fluids in their process (i.e. – paints and coatings, sealers and adhesives, potting compounds and encapsulants, etc.) all understand that the viscosity of that fluid is fundamental to the process out

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

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