Oh I wasnt suggesting that you replace all all patterns and molding with 3d printing. It certainly would not be cost productive for any sorts of production work. But for items that only a hand full would be produced it certainly seems to be a good application for. Having one so local to you is a big plus in my book.
Hate do do it, but I need to derail the tread for a second or two to ask a question. I am hoping you have gotten a look at the local printer. Back when this thread first popped up I got onto a kick for building a 3d sand printer and have been toying with the design some. My stumbling block is the way the sand is deposited/layered onto the bed. Is the feeder just a vibratory spreader or is there more going on that I just cant see?
I understand what you were getting at but others might not have. The whole conversation would be a good one but, yes, not really in this thread. I have seen these machines work close up and there are really no surprises since I have been around 3D rapid prototyping of various sorts since about 1990. 3D sand is just the latest craze. Useful, as you say, but specific in application. The smoothness of operation seems to rule out vibratory spreading, but I have never asked. I assumed it was lightly blown through the printer head and laid that way onto the layers of resin. I will have to ask how the Exone machines work in that regard. As I understand the whole industry is undergoing very rapid improvements and modifications. New ways of printing are being developed and pricing is dropping some right now. Still very expensive, though.
Tod