Resin Delivery Cart

 

Context :

Adidas has factories of 50-100 Carbon large format L1 printers that are making midsoles for their FutureCraft 4D line of sneakers. Due to pot-life restrictions of the elastic polyurethane two-part resin, each printer needs to be refilled with new resin every 2-3 prints or about every hour.

Project Goals :

  • Ensure the safety of operators who will be interacting with the equipment and resin.

  • Reduce waste associated with normal manufacturing processes by centralizing resin delivery and recycling resin back into the system. 

  • Maintain the “digital thread” as much as possible.  Our unique manufacturing methods enable the tracking of each midsole from start to finish to maintain consistency and identify manufacturing problems.

  • Minimize technician process control management.

Solution :

  • The Resin Delivery Cart was designed to fill 6 printers with the required resin before requiring a refill.

  • Resin delivery via air pressure minimized consumable components and cleaning required of wetted components.

  • Fully portable cart with off the shelf drill battery allowed hot-swapping for a charged battery.

  • The E-stop cut power to all the electronics and the manual pressure release allowed technicians to de-pressurize the resin holding tank in moments.

  • The resin holding tank was equipped with a pneumatic mixer to incorporate “reclaimed” resin with fresh resin.

  • Guesswork of resin management was eliminated by displaying QR codes on individual printer screens which corresponded to the amount of resin each printer required.

  • Accuracy of resin delivery was maximized by a mass scale and a feedback control loop.

ResinDelivery Cart_5inches.jpg
Left: Reading the QR code on an L1 printer.Above: Nozzle holder secures resin delivery nozzle to printer’s cassette.

Left: Reading the QR code on an L1 printer.

Above: Nozzle holder secures resin delivery nozzle to printer’s cassette.

 
 
Front of Cart_6inches.jpg

Results :

Testing with water was successful. The development cost to fully develop this product ultimately was too high due to its complexity. However, the QR-code development initiated predictive resin consumption studies by the Carbon systems integration team. An average refill amount was determined that prevented under or over-fill issues 98% of the time. Problem solved but without any cool new hardware!

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