CE Certification Copper Foil Slitting Machine Supplier & Suppliers

Battery-grade copper foil slitting deals with ultra-thin webs (typically 4.5μm to 12μm) possessing low tensile yield points and extreme sensitivity to surface scratching and edge micro-tears. Unlike standard heavy slitting lines using hydraulic loop pits and friction felt pads, a copper foil slitting line requires: (1) Ultra-light dynamic dancer rolls with precision air bearings; (2) Special tungsten-carbide disc shear knives with horizontal clearances held within 1–2μm; (3) Cleanroom-compatible dust removal hoods; and (4) Individual friction differential winding shafts to maintain uniform rewind tension across 20+ narrow strips simultaneously.

Compliance is embedded from initial 3D mechanical architecture through to software coding. We conduct strict risk analysis pursuant to EN ISO 12100. Moving nips and slitter arbor drives are protected via Category 4 / PLe light curtains and safety interlocked guarding. Electrical enclosures comply with EN 60204-1, incorporating certified fail-safe circuits, low-noise earthing, and full electromagnetic compatibility (EMC) compliance according to EN 61000-6-2/4. Each line is stamped with a traceable CE mark and issued an EC Declaration of Conformity.

Burr minimization requires three synchronized elements: (1) Superior knife metallurgical quality using sub-micron grain tungsten carbide (WC) ground to Ra < 0.05μm surface finish; (2) Rigid blade arbor shaft design with runout tolerances held under 0.002 mm; and (3) Precision computerized axial lap/gap adjustment. By operating within the purely plastic shear zone without tear rupture, edge burrs are strictly kept below 1.5μm, preventing cell puncture defects in downstream lithium-ion winding.

Yes. Rolled-annealed (RA) foils have directional grain structures and higher elongation, whereas electrolytic (ED) foils exhibit columnar grain structures with one matte side and one shiny side, making them more prone to brittle edge splintering. Our digital PLC recipes allow operators to toggle between customized acceleration ramp curves, web entry angles, and differential tension settings specifically calibrated for either foil chemistry.

Standard build cycles range from 90 to 120 calendar days depending on strip width and slitting station configuration. Before container loading, buyers are invited to our 40,000 m² Wuxi factory (accessible via high-speed rail from Shanghai) for full Factory Acceptance Testing. FAT entails mechanical dry-cycling, electrical interlock validation, high-speed runout verification, and test slitting of material coils to confirm strip width tolerances and cut burr standards under optical microscopy.