HOME MADE MULLER |
Although I have not mixed any casting sand from scratch yet, the muller is also great for re-constituting the purchased Petrobond that I use. If I decide to "mix my own", the muller will be absolutely necessary. It is not very large, but then I do not do that much casting so batch sizes are not that important to me. |
The container was made from a cut-in-half 20 lb. propane bottle. A cradle was welded from angle iron, and an A-frame with castors was also constructed. The cradle was made so it can pivot to allow ease of emptying. Many mullers of this type use a door to remove the sand. I forgot to cut the door, so I decided on the tilt option. I had an old DC gearmotor that is used to drive the blades. It uses the same DC controller that I use on the S.B.. |
The inside of the "Carver" style muller. There is a flat plate welded inside the bottom, bearings are under the Plate. |
This is a departure from most carver style mullers. I added what I call "squeeze blades", which help roll the sand as it rotates inside. They squeeze the sand against the side, as well as down toward the bottom. There are a couple of small pieces welded inside the top lip of the drum, which keep the blades stationary. |
After the sand has been mulled, a pin is removed and the container can be tilted to empty. |
