That’s Three Dimensional Printing. My first attempt with resin material was not satisfactory. I posted the sad results HERE. However, one attempt does not qualify as a final result. Successful people keep trying what they want to do until they get it right. In this case, find the combination that works. Thomas Edison once said he discovered hundreds of ways not to make a light bulb.
Luckily, I didn’t have to go that far. There are people other than myself already doing it correctly. The materials for a successful 3D print casting exist. It just a case of sorting out all the variables and putting them together in a production stream that works for my conditions and situation. That’s what I enjoy. Working out the details of a very complex process.
The 3D plastic still doesn’t burn out as well as wax. I continue to see evidence of ash or debris on the resin castings. Not as bad as my first test. The PLA burned out quite well. The results are useable but not as good as I can cast with wax masters. Next run I will extend the 1350F hold from two to three hours.
The "wiggly" thingy was hand carved wax. The Fleuer-de-cross is resin DLP and the ring is PLA via FDM printing.
The new Plasticast investment powder is a wonderful product. It will be my new preferred investment powder for use with wax as well as plastic. The vacuum de-airing was a bit frightening. It rises over twice the height of my previous powder. I mentioned this in my previous post. Mold release (water quench) is outstanding. I love when a plan comes together, and things start working the way intended. It opens the door to making 3D printing a part of the LWC process and I have a new ability to design and create.
I am not at the point where 3D printing is going to be the only way I create models. Wax carving by CNC milling and hand is not going to go away. I enjoy the manual carving. The “squiggly” pendant is an example. It was completely hand carved. I enjoyed making every curve with files and wax carving knives.
The investment process brings out EVERY minute detail in the model. It hides NOTHING. The 3D prints, especially the FDM with PLA shows every layer line in the model. My first instructor warned me, it is far easier to smooth and detail flaws on the model, than to remove those flaws from the silver casting. How true that is!
I was able to grind and polish out the slight “evidence” of the FDM layers, but that’s doing it the hard way. Resin 3D prints are much smoother, but not perfect. Wax is still the best material for masters but can be fragile to handle. Everything has a compromise to understand and consider.
I may have a use for FDM 3D prints now that I know the PLA can be burned out. I may want that look. I am now feeling better about doing design with my DLP (Wanhao D7) printer.
Full STEAM ahead. (I like model steam engines, too) I am already getting requests for jewelry that can be designed in CAD, 3D printed, and cast is silver!