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BONUS SECTION: WIRE PROCESSING

FEBRUARY 2023

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AEROSPACE ASSEMBLY

MEDICAL REVIEW

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Lightweight battery-powered aircraft are ready for take-off.

System Automates Assembly of Test Cartridges

John Sprovieri // Chief Editor

In RNA’s cartridge assembly system, robots handle some tasks, while people handle others. Photo courtesy RNA Automation Ltd.

MEDICAL PRODUCTS


Blood gas analyzers measure gases dissolved in the blood, such as oxygen and carbon dioxide. Such information is vital when caring for patients with critical illnesses or respiratory infections, such as COVID-19. These analyzers rely on various disposable cartridges to process blood samples. Millions of these cartridges must be assembled each year.

A blood gas analyzer works by pumping a blood sample through a measurement cartridge, which has multiple sensors to measure pH and the partial pressures of oxygen and carbon dioxide. The bicarbonate concentration is also calculated. Many blood-gas analyzers will also report concentrations of lactate, hemoglobin, several electrolytes, oxyhemoglobin, carboxyhemoglobin, and methemoglobin. These results are usually available for interpretation within five minutes.

These cartridges last for 28 days or a specific number of samples.Once a sample has been analyzed, the sample path must be cleaned before the next sample can be analyzed. This is done with a “wash/waste cartridge,” which has a cleaning fluid and bag to capture the waste. This is then disposed of after nine days or a certain number of samples.

Once a sample has been analyzed, the sample path must be cleaned before the next sample can be analyzed. This is done with a “wash/waste cartridge,” which has a cleaning fluid and bag to capture the waste. This is then disposed of after nine days or a certain number of samples.

ACE damping solutions quickly decelerate moving loads without damaging impacts. Our shock absorbers assist with slowing down and stopping functions, providing a quick and quiet stopping on machines. Stainless steel options are available for areas that need to be sterile and remain free from dust and debris.

 
ACE Controls

800-521-3320

shocks@acecontrols.com

https://www.acecontrols.com/

Provide safe, high quality care with ACE

RNA Automation Ltd., a systems integrator in Birmingham, UK, recently designed and built an multistation system to automate assembly of wash/waste cartridges for blood gas analyzers. The customer, a global medical technology company, had previously been assembling the cartridges manually.

RNA’s system does not do away with manual labor entirely. Rather, automation and people work together at the same time within a limited workspace. The efficient integration of robots and vision into the assembly line adds significant value due to their reliability and repeatability, resulting in increased throughput and productivity.

Motion Index Drive manufactures precision rotary and linear indexing devices that are utilized in clean room environments with high speed and high accuracies. We can customize our products to comply with specifications for medical manufacturing with steel plating, special coatings, or having your unit completely sealed to eliminate intrusions with zero maintenance.


Motion Index Drives
877-978-1830
info@mid.us.com

www.motionindexdrives.com


Precision Indexing Machines for Medical Manufacturing

The pallet-transfer conveyor is a recirculating loop. Various mechanisms ensure that the pallets are precisely located at each assembly station. Photo courtesy RNA Automation Ltd.

At the start of the line, an operator loads cartridge bases through a poke-yoke aperture onto a two-lane declined conveyor. The cartridge bases are taken down a track to a stop, where they are picked and placed into a nest on a pallet-transfer conveyor. The vertical axis of the pick-and-place unit is pneumatic actuator, while the horizontal axis is a servo-driven actuator.The pallet-transfer conveyor is a recirculating loop. Various mechanisms ensure that the pallets are precisely located at each assembly station.

WEISS North America offers a broad range of precision, high-quality cam-, servo-, and linear motor-driven automation components and solutions for use throughout the medical and life sciences industries. Our design approach provides unprecedented flexibility and our end-to-end control software (W.A.S. 2) will bring your WEISS automation solution online quickly and efficiently.

WEISS North America

888-WEISSNA (888-934-7762)

info.us@weiss-world.com

https://www.weiss-world.com


WEISS Delivers Medical & Life Sciences Solutions

At this station, a press installs a clip into the cartridge housing. The press measures the force applied with reference to the distance travelled by the ram to ensure the waste bag has been loaded and fitted correctly. Photo courtesy RNA Automation Ltd.

At the start of the line, an operator loads cartridge bases through a poke-yoke aperture onto a two-lane declined conveyor. The cartridge bases are taken down a track to a stop, where they are picked and placed into a nest on a pallet-transfer conveyor. The vertical axis of the pick-and-place unit is pneumatic actuator, while the horizontal axis is a servo-driven actuator.The pallet-transfer conveyor is a recirculating loop. Various mechanisms ensure that the pallets are precisely located at each assembly station.

The pallet-transfer conveyor is a recirculating loop. Various mechanisms ensure that the pallets are precisely located at each assembly station.

At the next station, septa are fed and orientated by two vibratory bowl feeders and are then picked and placed into the housing. A vision check confirms that the septa are in the correct port (they are color-coded), that they are completely seated within the cartridge, and that a red tab is present. A sensor checks that the tab is correctly in place.

An operator manually loads and fits a waste bag before pressing a two-finger start, which enables a press to extend and push a clip into the cartridge housing. The press measures the force applied with reference to the distance travelled by the press to ensure the waste bag has been loaded and fitted correctly.

The FlowPack Cup (FPC) suction cup series by COVAL is specifically designed to handle ultra-flexible packaging and will “stick to the product” regardless of shape or material. As a result, it is able to handle very high production rates. The food-grade silicone and plastic insert meets FDA and EC standards.

 
COVAL Vacuum Technology Inc.

919-233-4855

www.coval-inc.com

FlowPack Cup by COVAL Handles IV Bags Easily

At the next station, an operator manually loads and fits a wash bag and supports before actuating a whisker switch for the pallet to be released to the next station. Then, a vision system checks that the top half of the wash and waste bags are within the perimeter of cartridge base.

At the next station, lids are loaded by an operator into one of two magazine drawers. The magazines can be topped up independently. The magazine, once returned within the cell, is picked from the top of the stack by a six-axis robot and placed into a datum station. Once the lid is accurately located it is picked again by the robot and assembled to the cartridge base. Once fitted, a presence check for lid ‘tabs’ is completed.

Assembled cartridges arrive underneath a label applicator, where a label is printed and applied to the cartridge. The sides of the label are wiped down, and then a vision sensor performs an OCR check and a test scan to check the bar code.

Once assembled, cartridges are picked from the pallet and placed onto an outfeed gravity track, where they travel to an off-load area.

IC80 Inline Chassis Features

  • Open frame designs allows access all around
  • Tensioned with chordal compensating cam to reduce vibration
  • Link pins use needle roller bearings for increased longevity
  • Multiple drive options

Performance

  • Zero-backlash in all directions
  • High load capacity
  • Long-term accuracy
  • Fast and flexible indexing

Sankyo Automation

937-498-4901

www.sankyoautomation.com

Superior precision positioning products

If a failure is detected at any station, no further value is added to the assembly. The assembly continues to index around to the off-load station, where it is placed into the failure lane. This lane is accessed at the back of the pack station, so that it’s completely isolated from the operator who is accessing good cartridges. Failed cartridges can be removed from the cell without interrupting production.

At the packaging station, an operator offloads cartridges and loads them into either a single or quad box. The box is then loaded into the printing drawer and a two-hand start is activated for the drawer to retract into the station. Inside the station the box is automatically located to a datum position, a label is applied, and the label position and bar code are checked. The operator then activates the two-hand start again and the drawer opens for the operator to remove the box.

For more information on automated assembly systems, visit www.rnaautomation.com.

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February 2023 | www.assemblymag.com

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