Circular die cutter (also known as round cutter, roller cutter or rolling cutter) is an industrial tool used for continuous high-speed die-cutting, widely used in fields such as printing and packaging, electronics, medicine, daily chemical, and new energy. It achieves line contact cutting through the combination of rotating knife rollers and embossing cylinders, and has the characteristics of high efficiency, high precision, and suitability for large-scale production.
Core Features
Working principle: Adopting a "circular pressing circle" structure, the knife roller and the embossing roller rotate synchronously, and the material is continuously cut when passing between the two.
Cutting method: Line contact cutting, compared to flat point contact, has more uniform pressure and less material deformation.
Applicable materials: paper, film, stickers, foam, electronic adhesive materials, battery separators, non-woven fabrics, etc.
Accuracy level: The error of ordinary circular die-cutting can be controlled within ± 0.07mm;
High precision magnetic die-cutting can reach ± 0.03mm or even higher.
Speed advantage: The online die-cutting speed can reach 200 m/min, far higher than flat die-cutting.
common types
Integral fixed round knife: high hardness, high wear resistance, suitable for precision die-cutting of electronic adhesives, stickers, and other materials.
Magnetic die-cutting roller: composed of magnetic roller and flexible blade, supporting quick changeover, suitable for multiple varieties and small batches.
Function integrated cutting tool: blow/suction type waste removal round knife: automatically removes waste to avoid blade damage;
Adjustable slitting knife: The cutting width can be fine tuned, with a minimum gap of millimeters.
application field
Printing and packaging: cigarette packs, medicine boxes, high-end gift boxes, etc;
3C Electronics: Die cutting of adhesive parts, foam, and optical films in mobile phones and tablets;
New energy: lithium battery separator slitting;
Medical and Health: Die cutting of non-woven materials for medical dressings, sanitary napkins, and masks.
Technical difficulties and requirements
The manufacturing process of cutting tools is complex and requires high-precision CNC engraving or etching;
High heat treatment requirements (hardness often reaches HRC60-62);
High requirements for the cutting resistance of the bottom rubber pad, which needs to withstand hundreds of thousands of cuts without loosening;
The blade width is usually 0.02-0.05mm and the height is 1.0-1.5mm.
