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Factors affecting tool use and life of the paper cutter

Time:2019-06-24

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  First, the knife material

  The cutter of the single-piece paper cutter is made by high-temperature welding of the blade and the cutter body. The blade is made of high-hardness chromium-tungsten-manganese steel, and the cutter body is made of low-carbon steel. The durability of the tool is proportional to the hardness of the steel part of the blade. For high-quality blades, the hardness of the blade after quenching can reach HR55~60.

  Second, the shape and angle of the sharpening knife

  On a single-sided paper cutter, a single-blade cutter is generally used, and the sharpening angle is between 19° and 23°. However, the sharp edge of this shape is not an ideal shape, and the beveled surface of the cutter is subjected to the pressure from the portion of the paper that is cut during the cutting process, so that the bevel of the blade is very good under the friction of the paper edge. It is getting worn out. The double-edged tool has obvious advantages, and its sharpening helps reduce the load on the machine and improves the accuracy of the cutting.

  The smaller the angle of the sharpening edge of the tool, the sharper the cutting edge, the smaller the shear resistance of the cut object to the knife, the less wear and power consumption of the machine, and the cut product is neat and the cut is smooth. However, if the sharpening angle is too small, the strength and wear resistance of the cutting edge will be correspondingly reduced, and the cutting speed and cutting quality will decrease. Therefore, the angle of the sharpening edge should be as small as possible, provided that the tool material permits, and taking into account the shear resistance of the cutting material.

  Third, the quality of sharpening

  The quality of the sharpening depends on the materials and equipment used, the specifications of the sharpening process and the technical level of the operators. The higher the quality of the sharpening knife, the longer the life of the cutting knife and the better the cutting quality.

  Fourth, the type of cutting material

  During the cutting process, the speed at which the knife edge becomes dull is related to the wear resistance of the material being cut. When cutting paper, the speed at which the blade becomes dull is related to the softness and hardness of the paper and the amount of ash. When the paper with a harder texture and a higher ash content is cut, the blade becomes dull faster.