High-speed Slitting Circular Knives

High-speed slitting circular knives are often used for slitting of paper, film, leather, cloth and other materials. The following is an introduction from many aspects:

1. Basic information

• Definition: It is a circular tool on slitting equipment (such as slitting machine), which accurately slitting various materials during high-speed operation. It is a key component in the material slitting process in industrial production.

• Material: Common materials include high-speed steel (such as W6Mo5Cr4V2, W18Cr4V), cemented carbide (tungsten steel), 52100,9CrSi, SKD11, etc. Different materials are suitable for different slitting needs. For example, high-speed steel has good wear resistance and is suitable for general high-speed slitting scenarios; cemented carbide has higher hardness and is used for slitting materials with high hardness and high precision requirements.

• Specifications: various sizes such as diameter, thickness, inner hole, etc., ranging from tens of millimeters to hundreds of millimeters (such as 8mm - 750mm), which can be adapted to different slitting machines and slitting width requirements. For example, large-diameter circular knives may be used for slitting wide materials, while small-diameter and thin-thick ones are selected for fine narrow slitting.

2. Application scenarios

• Industry fields: widely used in papermaking, packaging, textiles, leather, electronics, metallurgy and other industries. The papermaking industry slitting base paper, toilet paper, etc.; the packaging industry slitting film, tape, carton materials; the textile industry slitting fabrics, non-woven fabrics; the leather industry slitting leather, artificial leather; the electronics industry slitting copper foil, aluminum foil and other electronic materials.

• Specific operations: such as rewinding and slitting in toilet paper production, fabric cutting and striping, film slitting and bag making, metal foil slitting and processing, etc., all require high-speed slitting large circular knives to efficiently and accurately slitting materials.

3. Performance characteristics

• High precision: It can achieve smooth material cuts, no burrs, no wire drawing, ensure the quality of materials after slitting, and meet the requirements of high-end product production for material size and appearance. For example, copper foil slitting in the electronics industry, insufficient precision will affect the subsequent circuit board production.

• High wear resistance: Due to continuous friction with the material during high-speed slitting, the material must have good wear resistance, extend the service life of the tool, reduce the frequency of tool change, improve production efficiency and reduce costs. High-speed steel circular knives have strong wear resistance and can be reground and used many times.

• High speed adaptability: To work stably on high-speed slitting equipment, it is necessary to have good dynamic balance and mechanical strength to ensure that there is no shaking or chipping during high-speed rotation, and to achieve stable and efficient slitting. For example, the large circular knife equipped with a high-speed slitting machine can reach a speed of thousands of revolutions per minute.

IV. Selection and maintenance

• Selection points: Select materials according to the slitting materials (hardness, thickness, toughness, etc.), such as carbide circular knives for slitting hard materials; select circular knives with good specifications and adaptability according to the parameters of the slitting machine (speed, power, and compatible knife seat size); also consider production efficiency and cost budget, and balance tool performance and procurement and use costs.

• Maintenance: Regularly check the wear and tear, and repair and replace the blade in time if it is blunt or chipped; clean the knife body after use to remove residual debris to prevent rust and affect the next slitting; pay attention to moisture and collision when storing, and apply anti-rust oil and place it in a special knife holder/box.

For example, in the high-speed rewinding and slitting of toilet paper, double-sided carbide knife rings are often used with high-speed steel upper circular knives, which have good wear resistance, long grinding cycle, and are suitable for high-speed production; when slitting cloth, high-speed steel or alloy circular knives can ensure smooth incisions and improve the quality of finished cloth