Knives Suitable for Corrugated Board Paper Slitting

Knives Suitable for Corrugated Board Paper Slitting:

In the corrugated board industry, several types of knives can be used for slitting, but the most common and effective are:

• Circular Slitting Knives: These are highly popular for their precision and ability to handle high-speed production. They can be either beveled or razor-edged, depending on the material thickness and the desired cut quality.
  • Beveled Edge Knives: Used for thicker materials or when a clean, sharp cut is needed. They can penetrate deeper into the material.
  • Razor Edge Knives: Best for thinner materials, providing a very fine cut with less pressure.
• Shear Slitting Knives: Often used for heavier or multi-layered boards where a shearing action provides a cleaner cut.
• Score Knives: Specifically for scoring, which is essential before folding corrugated boards, though not directly for slitting.

Choosing Tungsten Carbide Circular Blades:

1. Material Hardness:
   • Tungsten Carbide: Known for its extreme hardness, it maintains sharpness longer than steel, reducing downtime for blade changes and resharpening. However, it’s brittle, so careful handling is necessary.
2. Blade Geometry:
   • Edge Angle: A smaller angle (more acute) will give a sharper cut but might wear down faster. A larger angle (more obtuse) offers durability but might not cut as cleanly.
   • Diameter and Thickness: These must match the slitting machine’s specifications and the thickness of the corrugated board to ensure even cutting pressure.
3. Edge Quality:
   • Surface Finish: A polished edge reduces friction, leading to smoother cuts and less dust generation.
   • Burr-Free: Ensures the blade cuts without tearing the paper.
4. Durability and Wear Resistance:
   • Consider the expected lifespan of the blade under your specific operational conditions. Tungsten carbide’s resistance to wear is a significant advantage, but the type of carbide (e.g., with or without cobalt) can affect this.
5. Application Specific Needs:
   • Cutting Speed: Higher speeds might require blades with enhanced heat resistance or cooling mechanisms to prevent thermal expansion.
   • Material Type: Different corrugated boards (single, double, or triple wall) might require adjustments in blade selection.
6. Cost vs. Performance:
   • Although tungsten carbide is more expensive than steel, its longevity and performance might justify the cost, especially in high-volume production scenarios.
7. Safety and Installation:
   • Ensure the blades are compatible with your machinery in terms of mounting and safety features. Proper installation is crucial to avoid blade slippage or damage.
8. Resharpening:
   • While tungsten carbide blades last longer, they can be resharpened, but this service might be more specialized and costly compared to steel blades.
9. Environmental Conditions:
   • Consider the operational environment; for instance, humidity or dust can affect blade performance over time.