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What is the function of a slitting knife
The slitting round knife is a tool that plays a crucial role in the material slitting process, mainly serving the following functions:Sources：www.hafc.net.cn | PublishDate：2024.12.11
1、 Material cutting purpose
1. Correctly cut multiple materials
Circular cutters can be used to cut various soft and hard materials. In the paper processing industry, it can cut large format paper into small sheets of different sizes. For example, cutting a roll of wide news paper into standard sizes such as A4 and A3 to meet the needs of different printing applications. For plastic films, such as polyethylene films used in food packaging, a slitting knife can correctly cut wide films according to the required width of the packaging equipment, allowing the film to adapt to different sizes of food packaging.
In the processing of metal foil materials, such as aluminum foil, a slitting knife can cut thick aluminum foil rolls into thin ones that meet the specifications for industrial applications such as capacitor manufacturing. Meanwhile, in the processing of materials such as leather and fabric, they can also be cut into suitable widths for making clothing, leather goods, and other products.
2. Control the cutting size accuracy
This type of tool can achieve high-precision cutting size control. Its circular accuracy is very high, and during the rotary cutting process, it can ensure that the width or length error of the material after cutting is controlled within a very small range. For example, in the electronic materials industry, slitting circular knives are used to cut the substrate of flexible circuit boards (FPCs), with an accuracy of millimeters or even micrometers, ensuring that the size of the FPC substrate after slitting meets the requirements of precision assembly of electronic products, which is conducive to improving product quality and production efficiency.
2、 Improvement in material processing quality
1. Good cutting edge quality
The slitting round knife can make the edges of the material flat and smooth during cutting. This is because of the blade design of the round knife and the high-speed rotating cutting method. Taking cardboard slitting in the packaging industry as an example, the edges of the cardboard cut with a slitting circular knife have no burrs, which is very advantageous for subsequent printing, folding and other processing procedures. If there are burrs on the edges, it may cause uneven ink adhesion during the printing process, and may damage the paper during folding, affecting the overall quality of the packaging.
Smooth edges can reduce stress concentration during subsequent processing when cutting metal strips. For example, in the production of metal steel strips for automotive parts, the quality of the edges of the steel strips cut by the slitting round knife is good, which is beneficial for subsequent stamping, welding and other processing procedures, and reduces the probability of quality problems such as cracks in the parts.
2. Reduce material waste
Due to the high-precision cutting of the circular cutter, it can effectively utilize materials. It can correctly cut materials according to order requirements, reducing corner waste caused by incorrect cutting sizes. In wood processing, when cutting large-sized wooden boards into the required sizes for furniture components, correct cutting can significantly improve wood utilization, reduce production costs, and also conform to the concept of resource conservation.
3、 In terms of improving processing efficiency
1. High speed continuous slitting
The slitting circular knife is usually installed on a high-speed rotating shaft, which can achieve high-speed continuous slitting operations. In the label printing industry, for roll by roll label paper materials, the slitting circular knife can quickly cut them into individual labels or label strips on high-speed slitting equipment, improving production efficiency. This high-speed cutting capability enables it to process large amounts of materials in a short period of time, meeting the needs of large-scale industrial production.
2. Good compatibility with automated production lines
The slitting round knife is easily integrated into automated production systems. In the food packaging automation production line, it can work in conjunction with packaging material conveying devices, bag making machines, and other equipment. When the packaging material (such as plastic film) reaches the cutting position through the conveying device, the cutting circular knife cuts it according to the preset program and size, and then the cut material directly enters the bag making machine for subsequent packaging processing. The entire process is highly automated, reducing manual intervention and further improving production efficiency.