FMI produces silicone components for medical devices using the iNexiv optical measurement system from Nikon Metrology. The iNexiv system provides clear, sharp images of transparent silicone parts, allowing FMI engineers to precisely measure dimensions and fine-tune designs. Automatic inspection with iNexiv has increased measurement productivity and reduced inspection time. FMI trusts measurement results from iNexiv which helps qualify new silicone component designs for medical device manufacturers.
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Case study fmi_silicone_molding_inspection_i_nexiv
1. FMI masters silicone molding
of critical medical components
using iNexiv
iNexiv adds speed and quality to
ultra-clean molding of silicone
components that go into
lifesaving medical devices
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FMI in the Chicago area produces molded silicone
components for medical applications. Intricate
features and key dimensions of tiny silicone
prototype and (pre-)production parts are measured
optically using a iNexiv system. FMI engineers say
that investigating parts under Nikon optics and
illuminations result in superior digital imaging that
guarantees high accuracy and R&R numbers,despite
the typical light glow covering the transparent
silicone material. Automatic iNexiv inspection jobs
triple measurement productivity, slash operator
overhead and eliminate human error, resulting in a
payback time of less than three months. According
to FMI, Nexivs solid reputation in the medical
device industry increase the trustworthiness of the
qualification/validation reports they generate for
the FDA and OEMs.
A world-class medical silicone company
At its stand-alone manufacturing facility in Elk Grove Village, Illinois,
FMI produces diverse implant grade and disposable molded silicone
parts. Long-term implantable silicone parts are used in medical devices
(pacemakers, defibrillators, heart valves, etc.) designed for prolonged
or extended service. Other silicone items are used in sealing systems,
manifolds, connectors, stoppers and other devices. As 90% of FMI
silicone products are implanted in the body, the FMI facility houses ISO
5, 6 and 7 clean rooms, fully equipped for silicone mixing, molding,
inspection and packaging operations.
As a medical silicone company, FMI complies with qualification
processes that ensure silicone material cleanliness, part shape integrity
and the lowest failure rates. Important in this regard is FMIs choice for
the table-top iNexiv system from Nikon Metrology, a high-performance
CNC precision video measuring system.FMI demands an optical system
because silicone parts are too soft to be measured using a touch probe.
Fairly large specimens can be measured with the Nexiv system because
it features a 250 x 200 millimeter stage and a 200 millimeter z stroke.
2. 9News I Volume 6
Clear and pinpoint sharp images
It is night and day compared to our other vision system, said Harold
Sant, Engineering Manager for FMI, Inc. in Elk Grove Village, IL, when
looking at the first images taken by the iNexiv vision system. The
new Nikon inspection system generates overwhelmingly clear and
pinpoint sharp images of difficult-to-measure silicon samples. Silica-
based elastomeric rubber material attracts light and has a characteristic
mystifying glow, but the iNexiv sees right through it. We have quickly
come to trust the system, because it generates a superior digital image
to measure from.
Inspection is key in FMIs Part Development & Prototyping (RPD)
programs. Recently, FMI was contracted for a silicone header part of
a pacemaker system to shorten the time between prototype and
production. The header part goes on top of a pacemaker assembly
and bundles all leads and connections. Based on elaborate iNexiv
measurements performed on different cuts, our engineers fine-tuned
the header part concept to ensure optimum moldability. Low-distortion
optics and high-intensity white LED illumination provide superb imaging
that leaves no room for any operator misunderstandings. Even the
headers intricate features could be investigated easily without requiring
any re-checks. We used image magnification up to 20x, which is way
below iNexivs maximum magnification of 120x.
The economics of automatic inspection
Measurement throughput used to be the bottleneck when dealing
with prototype qualification batches. Harold Sand says that instead of
inspecting header parts manually,FMI engineers teach the iNexiv system
to perform a number of dimensional measurements fully automatically.
Defining an inspection job following our own measurement techniques
is easy and very similar to setting up a macro.Automatic inspection takes
a jump start with intelligent search capabilities and pattern recognition,
whichautomaticallyspotstheheaderpartpositionandorientation.Inthe
Nikon Metrology iNexiv measurements are used to fine-tune part concepts
to ensure optimum moldability.
automatic inspection job we also included wall thickness measurements,
a unique capability offered as part of the Nikon AutoMeasure software.
Thanks to automatic iNexiv inspection using fast stage controls,we were
able to reduce the start-to-shelf time for the pacemaker header part
from 4 days to 1 day and a half!
Sand says that pre-production and production operations at FMI
probably benefit even more from automatic inspection. iNexiv proves
to be a major timesaver, considering the millions of silicone parts we
produce every year.The shift from manual to automatic inspection led to
a 3 month payback time for our system, just in labor alone.
The new Nikon inspection system
generates overwhelmingly clear and
pinpoint sharp images of difficult-to-
measure silicon samples.
Harold Sant, Engineering Manager for FMI, Inc
FMI is recognized as a leader in insert molding and
bonding of silicone to various substrates.
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High-precision measurements you can trust
The complexity of the parts has increased tremendously. FMI invests in
state-of-the-art processes and equipment to deliver the sophisticated
ultra-clean silicone product required for surgical implantation. Based on
expertise built up over the years, FMI is recognized as a leader in insert
molding and bonding of silicone to various substrates.
High precision is key in the medical device business, to make sure
critical silicone parts can be confidently incorporated into lifesaving
medical devices and state-of-the art laboratory equipment, remarks
Sant. The Nikon Metrology iNexiv system is ideal to measure any of
our silicone molded parts, including micro-precision parts manufactured
to the tightest tolerances. It outperforms our previous manual video
measuring system in terms of measuring accuracy and speed as well as
repeatability and reproducibility. We notice that leading medical device
manufacturing firms trust our inspection qualification and validation
reports better, because the majority of them are Nikon users themselves
who know the system we are using.
FMI is also a long time user of many stereomicroscopes from Nikon
and NIS Elements software to characterize the detailed features of
molding tools. The iNexiv CNC video measuring system was purchased
after concluding a detailed comparison study including demos and
benchmarks involving different brands. All along, we felt that Nikon
better understands our business,and that iNexiv hardware and software
are better aligned for inspecting medical device components, Sant
clarified.We would definitely recommend Nikon to any of our business
partners, also because we are very satisfied with the provided training,
support and advice.
All along, we felt that iNexiv
hardware and software are better
aligned for inspecting medical device
components
Harold Sant, Engineering Manager for FMI, Inc
In addition to the iNexiv CNC video measuring system, FMI uses many
stereomicroscopes from Nikon.
FMI houses clean rooms, fully equipped for silicone mixing, molding,
inspection and packaging operations.