Because 3D printers have printing capabilities beyond imagination, many products that are quite complex in the actual production process can be printed at one time, and when printing, the printer will automatically fill the gap between the active parts of the printing mold with a powdery object. After the printing is completed and each material is printed in place, do you feel that the task of the powder filler has been completed at this time, so find a way to take it out from the tiny gap without damaging the model. The ultrasonic cleaning machine can effectively remove the surface of the model and the gap filler without damaging the 3D printing model.