DEVICE FOR PROCESSING DENTAL PROSTHESIS WITH REDUCED NOISE

1 . A device for processing a dental prosthesis, comprising:

one or more spindles that are rotationally driven by one or more motors;

machining tools that are mounted on axis ends of the spindles to rotate together with the spindles;

a spindle mounting part that is driven in up-down and left-right directions, and on which the motors and the spindles are mounted; and

a workpiece mounting part on which a workpiece is fixedly mounted, and driven in a front-back direction,

wherein the spindle mounting part includes a spindle mounting housing in which the motors and spindles are mounted in its internal space, and one or more bearings that are mounted inside the spindle mounting housing to rotatably support the spindles, and

wherein a roughened portion that diffusely reflects noise generated by rotation of the motors and spindles is formed inside the spindle mounting housing.

2 . The device of claim 1 , wherein the roughened portion is selected from the group consisting of a protrusion, a groove, a screw thread, and a knurl.

3 . The device of claim 2 , wherein a height (h) of the screw thread or knurl is 0.01 to 2 mm, and a pitch (p) thereof is 0.01 to 4 mm.

4 . The device of claim 1 , wherein one end of the spindle mounting housing is further equipped with a motor bracket for fixing the motors, a bearing housing for accommodating the bearings, and a bearing spacer fitted between the bearings to maintain a gap between the bearings, and

wherein a roughened portion is formed on at least one of the motor bracket, the bearing housing, and the bearing spacer.

5 . The device of claim 1 , wherein the spindle mounting part has a dual spindle structure in which two motors and spindles are mounted on one spindle mounting part.