Labyrinth bolt is a very interesting bolt. There is a labyrinth on its shaft and a pin on the nut. This is a very beautiful metal version made by [Robinson foundry], which adopts a process that more manufacturers should know – lost PLA casting.
His basic method is 3D printing in PLA and then using roughly the same process as dewaxing casting.
He 3D printed the part in the PLA, as well as the gate and riser, and then immersed the part in the mud ten (10) times. He heated it in a kiln to 500 ° f (260 ° C) and the PLA melted and depleted or burned. With the disappearance of PLA, after repairing some cracks, he raised the temperature to 1500 degrees Fahrenheit (815 degrees Celsius) and vitrified the slurry into ceramics. He now has a mold.
The nut is bronze. The bolts are made of aluminum. He cast the metal in a hot mold and placed it in heated sand so that the metal could flow into all the small details. The rest of the project is just cleaning, but we learned that you can change the finish of glass bead blasting by changing the air pressure.
A good demonstration of a useful technique and an interesting toy at the end.
We introduce a great technology of lost foam casting using microwave.