Rotary Cutting Blade / Circular Cutting Knife
Precision Rotary Circular Slitter Knives: High-Accuracy Rotary Cutting Tools for Metal Foils and Electronic Optical Rolls
Yuan Li Knife specializes in the engineering and manufacturing of single-shaft rotary circular slitter blades tailored for advanced electronic substrates, flexible copper clad laminates (FCCL), battery electrode foils, and optical composite materials.
During continuous rotary slitting operations, circular knives must maintain ultra-high linear cutting speeds combined with dynamic stability. If outer diameter roundness or face runout exceeds specified tolerances, slit metal foils are prone to wavy edges, microscopic burrs, or tensile tearing. Machined on ultra-precision CNC optical profile grinders, Yuan Li precision circular slitter blades achieve submicron circularity and face runout tolerances, ensuring superior perpendicularity and edge straightness on every cut.
Core Manufacturing Highlights of Yuan Li Precision Circular Knives
- Submicron-Grain, High-Purity Tungsten Carbide: Features uniform grain microstructure with cutting edge hardness exceeding HRA 90, providing superior wear resistance to effortlessly slit metallic electrode foils and abrasive composite sheets.
- Mirror-Finished Dual-Face Ultra-Low Roughness Grinding: Both lateral side faces are mirror-polished to minimize friction, effectively preventing scratches on web surfaces and reducing electrostatic dust accumulation.
- Rigorous Dynamic Balance Calibration: Every circular blade undergoes stringent geometric tolerance inspections prior to dispatch, eliminating axial runout and vibration at high rotational speeds to protect machine spindle bearings.
Applicable Equipment and Precision Electronic Materials
Compatible Slitting Machinery
Automated battery electrode slitting lines, precision cross/longitudinal shears for copper and aluminum foils, optical multi-shaft rotary slitters, and roll-cutting lines for flexible printed circuits (FPC).
Compatible High-End Materials
Rolled/electrodeposited copper foils, battery-grade aluminum foils, FCCL, OCA optical adhesives, photovoltaic backsheets, conductive graphite films, and micro-thin release films.
[Technical Guide] Burr Prevention in Metal Foil and Electrode Slitting
- Controlling Edge Burrs < 5 μm: In lithium battery electrode and copper foil slitting, microscopic burrs are a primary root cause of separator punctures and internal micro-shorts. Yuan Li circular blades are verified via high-power optical microscopy to ensure zero edge micro-cracking and straightness, achieving virtually burr-free slit cross-sections.
- Compound Bevel & Chamfer Engineering: Custom double-bevel, compound-bevel, or single-bevel profiles tailored to material ductility rapidly release metal stress upon cutting, completely eliminating edge curl.
Optical and Electronic Grade Circular Knife Customization
Yuan Li Knife operates advanced precision grinding equipment supporting dimensions from outer diameters Φ60 mm to Φ350 mm and thicknesses from 0.5 mm to 5.0 mm, machined to exact spindle fit tolerances (H6/g6).
If you are looking to enhance metal foil slitting yields or eliminate edge burrs on electrode strips, feel free to contact the Yuan Li technical team with your engineering drawings and material specifications.