Corrugated Board Slitting Blade

The corrugated board slitting blade is a high – precision, specialized tool engineered for slitting corrugated paper into customized sizes and shapes. It integrates dual functions of precise cutting and creasing, featuring diverse structural designs (like circular, strip – shaped forms) and adaptable slitting methods. Crafted from premium materials (such as high – speed steel, cemented carbide), it ensures excellent hardness, wear resistance, and impact toughness. Whether handling single – wall or multi – wall corrugated boards, it delivers clean cuts, minimal tearing, and consistent performance, optimizing efficiency in packaging production lines while extending tool service life through advanced edge – retention and coating technologies.

Products Provided by Kedel

We offer the following types of blades. Whether you need standard sizes or customized sizes, we can precisely meet your unique requirements.

Circular Blade

Flat Blade

Die - cutting Blade

Serrated Blade

Grooving Blade

Vibrating Blade

Application Scenarios

Our blades play a crucial role in corrugated paper production. Whether slitting rolls for carton bases, creating creases for easy folding, crafting custom inserts, punching holes, or making tear lines, we can meet all these needs. Their precision benefits every process, ensuring smooth production and high – quality products.

Corrugated Paper Slitting with Blade

Corrugated Paper Indentation

Corrugated Paper Special-shaped Processing

Corrugated Board Grooving

Uncover Your Needs with Us!

If you need to purchase corrugated paper slitting blades, please provide the brand and model of the slitting equipment, the shaft diameter and slot specifications of the knife holder, as well as the specific requirements for the blades (such as the HRC value of the edge hardness, the allowable error of slitting accuracy, like ±0.1mm, and the expected service life of the blades). Additionally, please let us know the actual production environment (the temperature and humidity of the slitting workshop, whether the corrugated paper is single/double/triple – layered and its grammage, and any special conditions such as a dusty environment or frequent blade changes), so that we can precisely match and provide you with suitable slitting blades!

What is a corrugated paper slitting knife?

A corrugated paper blade is a specialized tool for slitting processing of corrugated boards, cutting large-format corrugated paper into required sizes through processes like cutting and creasing to meet the production needs of packaging products such as cartons and boxes, and it comes in various types including circular blades that achieve continuous slitting via high-speed rotation and flat blades that rely on upper-lower shearing action by structure, high-speed steel, cemented carbide, ceramic and other materials suitable for corrugated papers of different thicknesses and textures by material, as well as creasing blades, cut-off blades and other subdivisions by function, with parameters such as blade angle and thickness needing to be adjusted according to corrugated paper characteristics, serving as a key component in corrugated packaging production lines to ensure slitting accuracy, edge quality and production efficiency.

What are the common tool types used in corrugated paper slitting?

Corrugated paper slitting is a crucial process in the packaging industry, where large rolls of corrugated board are cut into specific widths to meet diverse packaging needs. The efficiency and quality of this process heavily rely on the slitting tools employed. Here are the common tool types and their characteristics

Disc - shaped blade

Structural Feature: Features a disc – like form, with a mounting hole at the center. The cutting edge is in a continuous circular shape. The blade body has a uniform thickness and can perform cutting operations through rotation.
Functional Advantage: When slitting corrugated paper, the rotary cutting is stable and efficient. It can ensure a smooth cutting process and uniform notches, and is suitable for high – speed production lines, reducing paper jams and uneven cutting problems.
Typical Applications: In large – scale corrugated paper production lines, it is used for the initial slitting of large rolls of base paper (such as cutting wide – width corrugated boards into narrow strips for carton production); it is used for longitudinal cutting of corrugated boards according to standard carton sizes.

Thin - bladed Strip - shaped blade

Structural Feature: Has a long – strip shape, with a thin and sharp cutting edge. The whole blade is flat and is usually installed on a fixed or semi – fixed tool holder.
Functional Advantage: It has high precision when cutting corrugated paper, can achieve straight – line cutting, and has little impact on material deformation. The thin – blade design reduces cutting resistance, and can obtain neat notches even when processing thinner or thin – walled corrugated materials.
Typical Applications: It is used for fine slitting of pre – printed corrugated paper (such as trimming edges for high – precision packaging); it is used for cutting strips of customized width to make special components such as carton dividers and liners.

Vibrating Blade

Structural Feature: The blade is slender and has good flexibility, and can vibrate at a high frequency (usually hundreds of times per second). The cutting edge is sharp and is connected to a vibration – generating mechanism to work in coordination.
Functional Advantage: The high – frequency vibration can reduce the friction during cutting and the tearing of materials, and is suitable for processing thick – layer and multi – layer corrugated paper. It can cut complex shapes and contours with high precision and is suitable for flexible production needs.
Typical Applications: It is used for cutting thick corrugated boards (such as when making corrugated paper display racks and special – shaped packages, to process thick boards or corrugated materials with complex structures); it is used for cutting operations of small – batch customized corrugated paper products, such as cultural and creative packages and personalized gift boxes.

Arc-shaped Grooving Blade

Structural Feature: The blade has an arc – like shape and is designed with grooves. The cutting edge fits the arc contour. It is usually equipped with a mounting hole or an adaptive structure for fixing on grooving equipment.
Functional Advantage: When grooving corrugated paper in an arc shape, it can fit the curved surface of the paperboard, ensure that the notch shape is regular and the edges are neat, reduce the risk of paperboard cracking during the grooving process, and is suitable for grooving requirements of different arcs.
Typical Applications: In the production of corrugated cartons, it is used to process arc – shaped notches such as box cover tab slots and rocking cover card slots, providing a structural basis for the folding and assembly of cartons after forming; it is used for special arc – shaped grooving operations of some special – shaped corrugated paper packages, such as the grooving of corrugated liners for circular gift box packages.

What are the common working methods?

In the field of corrugated paper processing and related packaging production, several specialized working methods play pivotal roles in shaping, cutting, and finishing the materials to meet diverse packaging needs. Here’s a detailed look at these common methods

Slitting

Use tools like circular blades to cut large corrugated cardboard sheets along specific directions (parallel/vertical to the corrugations) into strips of the required width, preparing materials for subsequent processing.

Creasing

Apply pressure via creasing knives, creasing dies, or rolling wheels to create fold lines on corrugated paper, allowing the cardboard to bend at predetermined positions. It can also be used to create textures.

Punching

Use punching dies (circular/irregular – shaped punches) to rapidly punch functional holes (such as handle holes, ventilation holes) in corrugated paper under pressure.

Die - cutting

Rely on pre – made die – cutting plates (with embedded blades and steel wires). Utilize the movement of die – cutting machines to cut corrugated paper into irregular shapes (e.g., cartons, liners). It can be combined with creasing.

Grooving

Use grooving tools (like arc – shaped grooving blades) to remove excess parts from the flaps and lapping tongues of corrugated cardboard, creating U – shaped/V – shaped grooves for easy folding and assembly.

Vibratory Cutting

High – frequency vibrating blades (hundreds of times per second) use a “vibration + cutting” combined action to cut corrugated paper. Suitable for cutting thick cardboard and complex shapes, without the need for traditional die – cutting plates.

What materials can be used to make cutting blades?

The hardness of blades largely depends on the density of the material. The higher the density, the harder the blade. This means they can withstand long – term corrosion and wear. However, it also means the blades will be more brittle and have poorer bending resistance. Therefore, excellent knife manufacturers need to strike a balance between hardness and toughness.

Tool Steel

Properties: Good strength and toughness. After heat treatment, the hardness can reach HRC 55 – 65. Low cost and easy to process.
Application Scenarios: General slitting in the corrugated paper industry, where there are no extreme requirements for precision and wear resistance.
Disadvantages: Fast wear under high – load and long – term operations; regular blade replacement is required.

Cemented Carbide

Properties: Made by powder metallurgy of refractory metal carbides and binders. Hardness above HRC 80, excellent wear resistance. Can perform high – speed and high – load cutting while keeping the cutting edge sharp.
Application Scenarios: Precision processing such as die – cutting and grooving in the corrugated paper industry, where precise cutting and less blade replacement are needed.
Disadvantages: Poor toughness; prone to edge chipping under severe impact. High manufacturing cost and difficult to process.

High - Speed Steel (HSS)

Properties: High hardness and strength, good red hardness (maintaining cutting performance at high temperatures). Better toughness than cemented carbide, excellent machinability, and easy to make complex shapes.
Application Scenarios: Slitting and die – cutting equipment in the corrugated paper industry, multi – process scenarios that balance efficiency and durability.
Advantage: High comprehensive cost – effectiveness; widely used.

Ceramic

Properties: Extremely high hardness and excellent wear resistance. Good chemical stability, not easy to adhere to the material being cut. Enables high – precision and high – surface – quality cutting.
Application Scenarios: Cutting thin and high – precision corrugated paper products, scenarios with extremely high requirements for cut quality.
Disadvantages: High brittleness and weak impact resistance; strict requirements for use environment and processes, prone to breakage.

What parameters do we need to understand?

Understanding the parameters of corrugated paper blades ensures equipment compatibility, guarantees cutting quality and service life, optimizes production efficiency, and meets the needs of different processing scenarios.

I. Dimension Specification Parameters

Blade edge length / diameter (e.g., the diameter of a circular blade needs to match the shaft diameter of the equipment)
Blade thickness (affects strength and cutting precision)
Mounting hole diameter (matches the size of the equipment’s mounting shaft)

II. Material Performance Parameters

Tool material (high – speed steel, cemented carbide, ceramic, etc.)
Hardness (HRC value, e.g., cemented carbide HRC ≥ 75)
Wear resistance (determines the service life of the tool)
Impact resistance (prevents edge chipping during high – speed cutting)

III. Cutting Edge Process Parameters

Cutting edge angle (rake angle, relief angle, affects cutting resistance)
Cutting edge sharpness (reduces paperboard tearing)
Coating type (TiN, TiCN, etc., improves wear resistance)

IV. Equipment – Compatibility Parameters

Equipment speed range (avoids damage caused by speed mismatch)
Mounting method (bolt – fixed, slot – type, etc.)
Cutter shaft diameter (matches the tolerance of the tool’s mounting hole diameter)

V. Processing Technology Parameters

Applicable paperboard layers (single – wall, double – wall)
Paperboard flute type (A/B/C/E flutes, etc., different flute types have different hardness)
Recommended cutting speed (matches the equipment processing efficiency)

VI. Precision Parameters

Blade edge straightness (affects straight – line cutting precision)
Parallelism (a key parameter for multi – blade cooperation)
Circular runout tolerance (rotation precision of rotating tools)

Key Purchasing Recommendations (supplementary list)

Material priority: For high – speed cutting, choose cemented carbide; for general scenarios, choose high – speed steel; for die – cutting, choose high – hardness die steel.
Cutting edge angle: The rake angle of slitting knives is 10° – 15°, and the edge arc radius R of creasing knives is 0.5 – 1mm.
Equipment compatibility: Confirm the mounting hole diameter tolerance (e.g., Φ30mm ± 0.02mm) and the requirement for die – cutting force.
Special processes: The tooth pitch of dash knives is about 2mm, and the slot width tolerance of grooving knives is ≤ ± 0.3mm.

How to maintain and service cutting blades?

The following are the general maintenance methods for high-speed steel, cemented carbide, and ceramic cutting tools, summarized from the commonalities in operation specifications, cleaning & maintenance, storage environment, etc.

I. Operation Specifications

Control Cutting Load: Avoid overloading (e.g., exceeding the maximum designed cutting thickness/hardness) to prevent edge wear or chipping due to stress concentration.
Equipment Stability: Ensure the equipment (e.g., corrugated paper cutting machine) has a stable spindle and smooth operation to reduce micro-damage to the edge caused by tool vibration.
Foreign Matter Prevention: Remove impurities (e.g., sand, metal debris) from the material surface before cutting to avoid foreign objects embedding in the edge or accelerating wear.

II. Cleaning and Maintenance Steps

Remove Residues Promptly: After each use, clean the edge and tool body with a soft cloth (or compressed air) to remove cutting debris, dust, or resin (if cutting adhesive-containing materials), preventing corrosion (especially for high-speed steel prone to rust).
Non-Abrasive Cleaning: Do not use hard tools like steel wool or metal scrapers to avoid scratching the tool surface (ceramic tools require particular attention). Use a neutral detergent with a soft cloth instead.
Rust Prevention: For high-speed steel and cemented carbide tools, apply a thin layer of anti-rust oil if out of use for a long time (ceramic tools do not need this but should be kept dry).

III. Storage Environment Management

Dry and Moisture-Proof: Store in an environment with humidity <60% to prevent water vapor exposure (high-speed steel rusts easily, and long-term moisture may affect the bonding phase of cemented carbide). Use desiccants or moisture-proof boxes.
Collision Protection: Store tools separately to avoid stacking or extrusion (ceramic tools must be wrapped in foam, cork, etc., to prevent cracking). Install protective sleeves on the cutting edges.
Categorized Labeling: Store by material and label clearly to avoid misuse (e.g., using ordinary grinding wheels on cemented carbide tools by mistake).

IV. Regular Inspection and Record-Keeping

Wear Detection: Regularly observe the edge condition (e.g., chipping, curling, or rough cutting surface) and address anomalies promptly (high-speed steel/cemented carbide can be ground, while ceramic tools need replacement).
Operation Log: Record tool usage duration, cutting material type, and wear status to estimate service life and schedule maintenance/replacement in advance, preventing equipment failure due to excessive wear.

General Maintenance Comparison Table

Maintenance Aspect	High-Speed Steel	Cemented Carbide	Ceramic
Pre-Cutting Preparation	Check equipment stability	Same as above	Same as above
Cleaning Tools	Soft cloth + neutral detergent	Same as above	Same as above (no metal tools)
Rust Prevention	Necessary (machine oil/anti-rust oil)	Recommended (for long-term storage)	Not needed (keep dry only)
Storage Protection	Oil paper wrapping + dry environment	Same as above	Foam wrapping + separate storage
Key Anomaly Detection	Edge softening, rusting	Chipping, carbide detachment	Cracking, notches

How long can a blade typically be used?

The replacement cycles for high-speed steel, cemented carbide, and ceramic tools vary significantly based on material properties, cutting conditions, and maintenance. Below is a detailed breakdown of the factors and typical cycles for each type, along with judgment criteria for replacement

I. Key Factors Affecting Replacement Cycles

Corrugated Paper Characteristics
- Layers: Double-wall corrugated paper (e.g., AB-flute) causes faster wear than single-wall (e.g., A-flute). Paper with sand particles or coatings accelerates edge wear.
- Moisture Content: When moisture exceeds 12%, tool corrosion increases, reducing lifespan by ~20%.
Cutting Parameters
- High cutting speeds (>300 m/min) or frequent starts/stops accelerate edge dulling.
Tool Design
- Tools with serrated edges or anti-stick coatings (e.g., PTFE) can extend lifespan by 30%–50%.

II. Replacement Cycles & Criteria by Material

1. High-Speed Steel (HSS) Tools

Typical Cycle: 800–1,500 continuous cutting hours (approx. 3–6 months for 8-hour daily operation).
Replacement Criteria:
- Edge Condition: Visible burrs or dulling (edge feels rough when touched with a nail).
- Cutting Quality: Tearing at paper edges, 模糊 indentations, or increased debris.
Suitable Scenarios: Low-speed cutting (<200 m/min) of single-wall corrugated paper (A/C-flute).

2. Cemented Carbide Tools

Typical Cycle: 1,500–3,000 continuous cutting hours (6–12 months).
Replacement Criteria:
- Wear Indicator: Local chipping (>0.2 mm) or coating peeling on the edge.
- Performance Drop: Abnormal increase in cutting noise (>85 dB) or machine vibration.
Suitable Scenarios: Medium-to-high-speed cutting of double-wall corrugated paper (AB/BC-flute) or moisture-resistant coated paper.

3. Ceramic Tools

Typical Cycle: Theoretically 3,000–5,000 hours, but rarely used in practice (due to brittleness).
Replacement Criteria:
- Critical Damage: Micro-cracks or chipping on the edge (even minor damage requires immediate replacement).
- Efficiency Drop: Cutting speed must be reduced by >20% to maintain quality.
Suitable Scenarios: Ultra-high-speed precision cutting of ultra-thin corrugated paper (E/F-flute) under strictly controlled conditions.

III. Cycle Comparison & Practical Recommendations

Factor	High-Speed Steel	Cemented Carbide	Ceramic
Typical Cycle	800–1,500 hours	1,500–3,000 hours	3,000–5,000 hours
Main Failure Mode	Edge dulling, corrosion	Coating wear, chipping	Brittle fracture
Recommended Speed	≤200 m/min	200–400 m/min	400–600 m/min
Cost-Efficiency	Low cost, frequent replacement	Medium cost, moderate lifespan	High cost, fragile

Practical Optimization Tips:

Daily Monitoring: Inspect edges with a magnifying glass every 200 hours, focusing on serration tip wear.
Paper Pre-Treatment: Maintain moisture content at 8%–10% to reduce corrosion and fiber entanglement.
Tool Maintenance:
- Clean HSS tools with kerosene daily to prevent rust;
- Lightly grind carbide tool edges every 500 hours (grinding amount ≤0.05 mm).
Risk Avoidance: Never use ceramic tools on corrugated paper containing recycled fibers or impurities to prevent chipping and safety hazards.

Note: The above cycles are based on standard corrugated paper (triple-layer A-flute, 9% moisture). Adjust dynamically according to production load (e.g., 24-hour continuous operation) and paper specifications. Establish a tool life database to record cutting meters per tool (reference: HSS tools cut ~12–18 km/hour) for optimized replacement planning.