Working principle of meat grinder: When working, start the machine first and then discharge the material. Because of the gravity of the material itself and the rotation of the spiral feeder, the material is continuously sent to the knife mouth for shredding. Because the screw pitch of the spiral feeder should be smaller in the back than in the front, but the diameter of the spiral shaft is larger in the back than in the front, which produces a certain extrusion pressure on the material, and this force forces the chopped meat to be discharged from the holes in the grid. When it is used for canned lunch meat production, fat meat needs to be coarsely ground and lean meat needs to be finely ground. There are several different sizes of holes in the lattice plate, usually the diameter of 8-10 mm for the coarse stranded, the diameter of 3-5 mm for the fine stranded. Coarse and fine stranded grid plate, its thickness is 10-12 mm ordinary steel plate. Because of the large diameter of the thick stranded, the discharge is easier, so the rotation speed of the spiral feeder is faster than that of the fine stranded, but the maximum is not more than 400 RPM. Usually between 200 and 400 RPM. Because the total area of the holes on the grid plate is certain, that is, the discharge amount is certain, when the feeding spiral speed is too fast, the material is blocked near the cutter, resulting in a sudden increase in load, which has an adverse effect on the motor.
The edge of the reamer is installed along the transfer of the cutter. The knife is made of tool steel, the knife edge is sharp, after a period of use, the knife edge becomes dull, at this time should be replaced with a new blade or re-grinding, otherwise it will affect the cutting efficiency, and even make some materials are not chopped out, but by extrusion, grinding after pulp discharge, directly affect the quality of the finished product, according to some factory research, canned lunch meat fat serious precipitation quality accident, Often associated with this cause. After assembling or replacing the reamer, the fastening nut must be tightened to ensure that the grid plate does not move, otherwise the relative motion between the grid plate movement and the reamer rotation will also cause the effect of grinding the material. Reamer must be closely attached to the grid, otherwise it will affect the cutting efficiency. The spiral feeder rotates in the machine wall to prevent the spiral surface from touching the machine wall. If it touches the machine, the machine will be damaged immediately. However, their clearance can not be too large, which will affect the feeding efficiency and extrusion pressure, and even make the material flow back from the clearance, so the processing and installation of this part of the parts have higher requirements.
