3D Printing with Chocolate

Everyone seems to be talking about 3D printing lately. Last week, I received an email from a customer who had a new idea for 3D printing.

Chocolate!

Well I was intrigued. The customer wanted to modify current 3D Printing technology to work chocolate. There was obviously several hurdles. For instance, using a vat of molten chocolate as opposed to typical material, cleaning, and replacement parts to make a food safe low-cost printer. Her biggest problem was how to cool the chocolate after the application of each successive layer upon dispensing, so the chocolate didn’t pool into an amorphous blob.

She came to me asking about the Adjustable Spot Cooler. This product caught her attention because of the ease of installation with the magnetic base, the adjustable temperature control and instant cold air response. The magnetic base could be incorporated into her design fairly easily. The adjustable temperature control would allow her to decrease the temperature and decrease the cold flow at the same time. If she found that the force of the compressed air was damaging the printing process, reducing the cold flow would allow her to use a colder temperature to harden the layer that had just been used.  Finely the compressed air could be rapidly controlled with a solenoid to only run when the cold air is needed, which would limit compressed air cost.

Because of the high freezing point of chocolate and overall size constraints, I recommended that she first try a model 3204 Vortex Tube. A small Vortex Tube, which could use as little as 4 SCFM of compressed air and provide up to 3.2 SFCM of cold air at fifty degrees below the compressed air temperature, would be more than capable of forming a shell on the surface area of each extrusion. It is reasonable to assume that this air temperature would be around 20 degrees Fahrenheit, which could create a delicious chocolate shell for the next layer of chocolate be deposited.  She was able to buy the magnetic base, model 9029, separately to aid in her installation.Chocolate tools

Hopefully, you read this after lunch, because I made myself hungry looking for chocolate pictures, but I found what I would print for Christmas.

Dave Woerner
Application Engineer
davewoerner@exair.com
@EXAIR_DW