If you use an air driven fluid dispenser for the assembly of your product, it will soon become apparent to you (and your quality control inspectors!) that the air pressure uncontrollably surges into the syringe and slaps the air piston every time the air dispenser cycles. This heats the assembly fluid and places stress on it in the syringe, which changes the bonding properties of the fluid resulting in production rejects and defective products.
Here’s more information about how to create a permanent solution concerning this issue:
The history of firefighting in the fluid dispensing industry to eliminate this problem has been well documented. Syringe, piston, and dispense tip designs have been altered. Analog time was replaced by digital timers. Filtration systems were added. Operators were instructed to make hourly adjustments to air pressure and time settings. Each of these tactics were merely workarounds. Air pressure manufacturers continue to fail to recognize the root cause of erratic fluid dispensing and instead continue the wasteful process of firefighting byproduct problems.
Bandaid Solutions Won’t Solve the Problem
You’d think they would say “uncle” and admit that the fight is over and they lost but noooooooo…..Recently, the largest manufacturer of air fluid dispensers introduced their latest “band-aid” and even more telling, in their advertisement for it, they shamelessly, and finally, admit what we’ve said all along, that this latest band-aid …is intended to prevent air entrapment in pulse pressure dispensing to reduce bounce by creating a tight seal between the piston and the fluid, in turn, reducing product waste. Here we go again, more firefighting!
And who pays for all these band-aids? The end customer does, the one who wants to stop the rejects and improve their dispensing processes. Once again they are strong armed into buying another new “fix”, which by the way always seems to be an expensive consumable; it is a piston this time. And once again, adding to their ever increasing air driven fluid dispenser’s Total Cost of Ownership. Over time, how many “gold plated” pistons will they have to buy!!
Eliminate the Root Cause!
Why not eliminate the root cause of erratic fluid dispensing all together? Air! Eliminating air pressure entirely creates a more stable production cell with traceability to the point of dispense. AirFree® technology applies a gentle ramping of power to the motor from start to full speed dispensing. The ramping removes the violent slap of air pressure, protects formulators’ chemistry and assures fluid bonds exactly as a formulator promised. An AirFree® linear-drive dispense system provides users with a consistent, repeatable assembly fluid deposit worldwide which results in increased bottom line profits through higher productivity, fewer rejects, less fluid waste and lower production costs.
For more information about this, contact Fishman Corporation.