- Material of the Blade
Single-piece paper cutting machine blades are made by high-temperature welding of the blade edge and body. The blade edge is made of high-speed steel, while the body is made of low-carbon steel. The hardness of the blade edge determines its durability. High-quality blades, after heat treatment, have a hardness of HRC 58–60. - Grinding Angle of the Blade
Single-sided paper cutting machine blades are single-edged, with a grinding angle of 19°–23°. This angle causes the inclined surface of the blade to bear the pressure from the paper edge during cutting, leading to rapid wear of the blade edge. Double-sided blades offer better wear resistance, reducing the machine's load and improving cutting precision. For high-quality blade materials, considering the shear resistance of the paper, the grinding angle should ideally be smaller than 19°–23°. - Qualität des Klingenschliffs
The smoother the grinding finish of the blade edge, the lower the cutting resistance, resulting in a longer blade lifespan and better cutting quality. - Types of Paper Being Cut
The rate at which the blade edge dulls is related to the hardness and ash content of the paper. When cutting hard paper with high ash content, such as various types of high-grammage coated paper, the blade dulls faster.
The above factors influence the performance and lifespan of paper cutting machine blades. Proper techniques when using automatic, CNC, or hydraulic programmable paper cutting machines can enhance blade efficiency and durability.
Precautions for Blade Sharpening in Paper Cutting Machines
In industries such as printing and packaging, paper cutting machines provide higher cutting precision. Automatic, CNC, and programmable paper cutting machines are widely used in various high-end cutting applications. The sharpness and durability of the blade significantly impact the production efficiency and effectiveness of the cutting machine.
Main Factors Affecting the Performance and Lifespan of Paper Cutting Machine Blades
- Klingenmaterial
Single-piece cutting machine blades are made by welding the blade edge and body at high temperatures. The blade edge, made of chromium-tungsten-manganese steel, has high hardness, while the body is made of low-carbon steel. The durability of the blade edge is proportional to the hardness of the tool steel, with blade edge hardness reaching up to HR55–60 after quenching. - Qualität des Klingenschliffs
Higher grinding quality results in a longer blade lifespan and better cutting performance. - Shape and Angle of Blade Grinding
Single-sided paper cutting machines typically use single-edged blades with a grinding angle of 19°–23°. This shape causes the inclined surface of the blade to bear pressure during cutting, leading to friction with the paper stack and rapid wear of the blade edge. Double-edged blades have a clear advantage, reducing machine load and improving cutting accuracy. When the blade material allows, and considering the shear resistance of the paper, the grinding angle should be as small as possible. - Type of Material Being Cut
The rate at which the blade edge dulls is related to the wear resistance of the material being cut. When cutting paper, the blade dulling speed depends on the paper’s texture, hardness, and ash content. Harder paper with higher ash content causes the blade to dull faster.
Therefore, when using high-end automatic, CNC, or programmable paper cutting machines, attention to operational techniques can improve the efficiency and lifespan of the blades.