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.
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!