A student I recently hired is now an employee of the college because of his work as a student. His capstone was to develop the extrusion process on our very large 3-D printer that we built here at the STAC. This extrusion process basically takes the pellets from KC Recycling and extrudes them in the 3-D printing process.
The build volume of the printer we built here is four feet by three feet by six feet tall. It allows us to make very large parts from fully recycled car battery parts. If we used other plastics to generate that, we would have to buy virgin material and then print the part. This would be used to make moulds for any other type of manufacturing process.