Slitter Blades for Slitting Machines

Slitter Blades Description:

Premium Slitter Blades for Slitting Machines

Slitter blades are crucial components of slitting machines. Selecting the right blades not only extends their lifespan but also ensures cutting quality, preventing burrs and excessive debris on materials.

Blade Types:

• Single-Layer Small Edge: Suitable for cutting harder or thicker materials.

• Double-Layer Large Edge: Suitable for cutting high-precision and thinner materials.

Material Selection for Slitter Blades:

Our slitter blades are made from various high-quality materials, including high-carbon steel, high-speed steel, tool steel, alloy steel, and stainless steel. Customers can choose the most suitable material based on their specific needs.

Specifications and Customization:

We offer customized blades based on drawings and specific customer requirements, ensuring each blade perfectly fits your equipment and production needs.

Learn how to custom blades!

What do Slitter Blades Mean?

Slitter blades, also known as slitting knives or rotary knives, are circular or disc-shaped cutting tools used in slitting machines to cut wide rolls of material into narrower widths. These blades typically operate by rotating against a fixed anvil or another rotating blade, creating a precise and clean cut as the material passes through the slitting machine. The term “slitter blades” emphasizes their primary function of slitting or cutting material along its length.

Uses and Applications of Slitter Blades

Slitter blades are essential tools across a wide range of industries that process materials in roll form. Their key applications include:

• Paper Industry: Slitting large rolls of paper into narrower widths for printing presses, converting machines, and other downstream processes.
• Film and Foil Converting: Slitting plastic films, aluminum foil, and laminates for packaging, labeling, and other applications.
• Textile Industry: Slitting rolls of fabric, nonwovens, and textiles into narrower widths for garment manufacturing, industrial textiles, and other textile products.
• Tape and Label Manufacturing: Slitting wide rolls of adhesive tapes and label stock into individual rolls of desired widths.
• Rubber and Plastics Industries: Slitting rubber sheets, plastic films, and extruded profiles.
• Metalworking: Slitting metal coils (steel, aluminum, copper, etc.) into narrower strips for further processing.
• Packaging Industry: Slitting various packaging materials like flexible films, paperboard, and corrugated board.
• Medical and Pharmaceutical: Slitting medical tapes, films, and dressings.
• Hygiene Products: Slitting nonwoven materials for diapers, wipes, and other hygiene products.

Common Materials for Slitter Blades

The choice of material for slitter blades depends on the type of material being slit, the speed of operation, and the required blade life. Common materials include:

• Carbon Steel: Suitable for less demanding applications and slitting softer materials like paper and thin films. Offers good initial sharpness.
• High-Speed Steel (HSS): Provides improved wear resistance and can maintain sharpness at higher speeds compared to carbon steel. Various grades like M2 and M42 are used.
• Alloy Tool Steel (e.g., D2, A2): Offers a good balance of hardness, toughness, and wear resistance, suitable for slitting thicker and more abrasive materials like thicker paperboard and some metals. D2 steel is particularly popular for its wear resistance.
• Tungsten Carbide: Offers exceptional hardness and wear resistance, ideal for high-speed slitting of abrasive materials like reinforced paper, fiberglass, and thin metals, significantly extending blade life. Can be used as solid carbide blades or as carbide-tipped inserts.
• Stainless Steel: Provides good corrosion resistance, important in applications involving moisture or where contamination is a concern, such as in some food and medical applications.

Coatings such as titanium nitride (TiN), chromium nitride (CrN), or diamond-like carbon (DLC) can be applied to enhance surface hardness, reduce friction, and extend the life of slitter blades, especially when dealing with abrasive or sticky materials.

Common Slitter Blade Shapes

Slitter blades are primarily circular but come in various edge configurations and thicknesses to optimize slitting performance:

• Solid Disc Blades: Simple, one-piece circular blades with a sharpened outer edge. The edge can be straight, bevelled (single or double), or have a radius.
• Inserted Blade Knives: Feature replaceable cutting inserts made of harder materials like carbide, mounted on a steel body. This allows for cost-effective replacement of the wearing cutting edge.
• Scored Knives (Crush Cut Knives): Used in pairs, where one or both knives have a rounded or profiled edge that presses against a smooth anvil to create a score or crush cut in materials like paper or thin films.
• Shear Cut Knives: Used in pairs with overlapping, sharp edges that create a clean scissor-like cut. The overlap and side force are critical for clean cutting of materials like thin films and foils.
• Razor Blades (Circular): Very thin and sharp circular blades used for precision slitting of delicate materials like thin films and tapes.
• Dished Knives: Circular blades with a concave or convex profile, often used for slitting where material tension needs to be controlled or to create specific edge profiles.
• Perforating Slitter Blades: Circular blades with teeth or специально designed protrusions to create lines of perforations while slitting.

The working principle of slitter blades involves rotary motion combined with controlled pressure to shear or crush the material as it passes between the blade and a counter surface (another blade or an anvil). The sharpness and geometry of the cutting edge, along with the speed of rotation, material tension, and the specific slitting method (shear cut, score cut, etc.), determine the quality and efficiency of the slitting process. Proper setup and alignment of the slitter blades are crucial for clean and accurate slitting.

Choose Nanjing Metal Industrial‘s slitter blades to significantly enhance your production efficiency and product quality. We are committed to providing you with the highest quality blades and the most professional service to meet your slitting needs across various industries.

Why Choose Metal?

1. One-stop hassle-free import service

Easy to enjoy the convenience of importing, from transportation to customs clearance, we handle the whole process, you just need to pay VAT and wait for the goods to arrive at the company.

2. Competitive Pricing

We have seen its blades used in countless applications and is ready to handle whatever project you throw our way -delivering accuracy, durability, and unmatched competitive pricing.

3. ODM & OEM Available

Whether you provide drawings, sketches or samples, we are able to draw and manufacture for you. We also have the ability to assist in modifying existing designs and specifications to improve almost any industrial tooling application. Please contact our dedicated sales team to discuss your specific requirements.

4. Quality Control

A series of testing and inspections are performed to control quality, including first article inspection, Incoming material inspection, and materials certified, In-process quality inspection, Final quality inspection.

5. Flexible procurement, unlimited cooperation

Whether you are an importer, distributor, wholesaler or end-user, we welcome you to join us with minimum MOQ, no hassle for inquiry and more freedom for purchasing.

6. Overseas monitor, production progress real-time report

Become your exclusive monitor, regular transmission of every important node in the production line, no matter how far away, the progress of the product as far as possible to grasp!

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1.  Selection of Slitting Machines and Slitting Blades

2. How to Choose, Use, and Regrind Steel Plate Slitter Blades?

3. Production Process of Circular Blade Cutting

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