Slitting Blade
Precision Top Circular Slitting Knives: The Benchmark for Optical-Grade Micron Slitting and Zero Debris
Yuan Li Knife specializes in manufacturing precision shear-cut top rotary slitting knives engineered specifically for display optical films, polarizers, lithium battery separator films, and advanced electronic insulating materials.
In high-speed precision slitting machines, edge cut quality depends predominantly on the geometric accuracy at the overlap engagement point between top and bottom blades. Excessive axial runout or microscopic cutting-edge roughness will inevitably produce micro-burrs, micro-cracks, and shedding/flaking particles—directly leading to optical bright spot defects or battery internal short-circuit risks. Yuan Li slitter knives undergo micron-level ultra-precision grinding and mirror-polishing to achieve minimal axial runout, delivering crystal-clear, perpendicular, and debris-free slitted edges.
Core Engineering Highlights of Yuan Li Top Rotary Knives
- Submicron-Grain Tungsten Carbide (TCT) & Powder Metallurgy HSS: Sourced from high-purity carbide substrates reaching HRA 89–92. Outstanding resistance to grain spalling extends wear life several-fold compared to conventional alloy tool steels.
- Extreme Micron-Level Axial Runout Control: Axial runout and lateral parallelism are strictly controlled within ±0.002 mm, eliminating side-to-side wobble under high-speed rotation and maintaining a consistent shear clearance.
- Chipping-Free Mirror-Ground Cutting Edge (Ra < 0.05 μm): Inspected under high-power microscopy to ensure zero micro-notches; extremely low cutting drag completely prevents film tensile stretching, edge distortion, and dust shedding.
Applicable Machinery and Optical/Electronic Materials
Compatible Slitting Equipment
High-precision dual-shaft shear slitter rewinders, optical cleanroom slitting machines, high-speed lithium battery separator rewinders, and automated electronic tape slitting lines.
Compatible High-End Materials
Optical PET base films, diffuser sheets, brightness enhancement films (prism sheets), polarizing films (POL), wet/dry-process lithium battery separators, polyimide (PI) films, and ultra-thin release liners.
[Technical Guide] Key Factors for Controlling Burrs and Dust in Optical Film Slitting
- Blade Overlap & Lateral Spring Side-Load: Excessive blade penetration overlap accelerates lateral friction and heat buildup. Yuan Li slitter knives feature exceptional side-face flatness, requiring only minimal lateral preload to achieve clean shearing, substantially extending the service life of both knives and machine spindles.
- Optimized Cutting Edge Bevel Geometry: Tailored double-bevel or single-side compound bevel configurations matched precisely to film thicknesses (12 μm–250 μm) ensure smooth cutting stress distribution and prevent edge curl/curvature.
High-Precision OD and Bore Specification Customization
Yuan Li Knife offers a broad range of dimensions from outer diameters Φ50 mm to Φ200 mm, with inner bore tolerances strictly held to H6 fit. We accommodate plain round bores, keyways, and multi-hole locating flange configurations.
If your production line is facing film edge burrs, debris shedding, striations, or short blade life, please contact us with your specifications and drawings for a consultation.