Medical Design Briefs - May 2024 - 15

by taking control of the fluid from storage
to dispensing, " says Schafer. " It allows
us to maintain and control key parameters
used in the dispensing process
while ensuring an optimized fluid path
for properly degassed fluids. "
The fluid goes through a degassing
procedure using a vacuum tank system
that controls vacuum level, temperature,
stirring speed, and frequency. Once air
is removed from the fluid, an integrated
mechanical piston pump delivers fluid
to a push membrane and dispensing
valve(s). This system uses mechanical
force to move material through the fluid
system and the fluid is never in direct
contact with compressed air. This eliminates
issues, such as bubbles, inconsistent
dosing, stringing, and nozzle clogging
that are a result of air, moisture,
and contaminants being absorbed into
the fluid during fluid preparation and
delivery process.
For critical applications that require
hermetic sealing of medicines (drugdelivery
devices), fluid in an optical path
(electronic displays and lighting), and
high reliability electronics encapsulation
(aviation, aerospace, automotive controls),
proper degassing and fluid handling
is necessary. For dosing applications
in the nano-liter and sub-nanoliter
range, the sources of variance need to be
minimized to achieve the desired dosing
repeatability and production results.
Dispense Process Verification
Complete
The dispense process verification was
initiated by marco in late 2022 and completed
in early 2023.
" The big advantage marco was able
to bring to Pipeline is our capability for
dispensing very small amounts with excellent
repeatability, " says Schafer. " Part,
after part, after part, we can provide the
same amount of material, whether that
is measured by volume, mass or shape,
at high speeds. This dosing capability,
along with marco's ability to custom-design
solutions and process controls, creates
high performance systems. "
" The entirety of marco's fluid dispense
production on this project is now
technically complete, "
says Moncur.
" Next step, Pipeline will take this dispensing
process and build a production
machine around it. We will use marco's
same dispenser in the production machine
when it is built. "
Medical Design Briefs, May 2024
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15
" Working with marco was a positive experience,
and the product worked exactly
how we needed it to, " says Moncur. " It
allowed us to design this project to meet
our customer's specific requirements. It
was definitely a win for Pipeline and our
medical component manufacturer. "
This article was written by Patrick
Roberts, a freelancer who writes on industrial,
manufacturing, and technology
issues. For more information on Pipeline
Design & Engineering, LLC, contact Aaron
Moncur, amoncur@teampipeline.us or visit
www.teampipeline.us. For more
information
on marco Precision Dispensing
Systems, contact Tom Schafer, tom.
schafer@marco-systems.com or visit www.
marco-systems.com.
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Medical Design Briefs - May 2024

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