1. The cutter is severely worn. The clearance between the cutter and the inner wall of the mud cylinder is too large, or the spiral angle of the cutter blade is wrong. When replacing the cutter, pay attention to keep the clearance of 3 ~ 5mm, and make the cutter blade according to the design angle.
2. The surface of the cutter blade is too rough, and the friction between the mud and the blade is too large. Therefore, when surfacing the cutter, do not weld it in groups. Replace it all at one time. Replace it step by step and in batches to ensure smooth brick production.
3. The mud cylinder wall bushing is seriously worn. The gap between the blade of the cutter and the wall of the mud tank is too large, resulting in too much rotary movement of the mud in the mud tank, and the mud can not come out or go in. At this time, a new mud cylinder bushing should be replaced, or several ribs parallel or inclined to the axial direction should be installed on the inner wall of the bushing to replace the worn back and forth groove, prevent the ineffective rotation of mud and increase its effective extrusion.
4. The clearance between the mud cutter board and the cutter is too large to press the mud. At this time, the cutter board shall be adjusted or repaired and renewed to make the clearance between it and the cutter blade less than 10mm.