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What are the applications of double angle circular knives in the printing industry
Double angle circular knives (also known as double oblique edge circular knives) are the core cutting tools in the printing industry for cutting, die-cutting, trimming and other processing of rolls due to their high sharpness, flat cutting surface and high cutting accuracy. They are suitable for various cutting needs in the post printing process. The specific application scenarios are as followsSources：www.bsztq.com.cn | PublishDate：2025.12.15
1. High precision slitting of printing rolls
This is the core application scenario of the double angle circular knife, mainly used for cutting large format printing rolls into narrow finished products, and adapting to the post-processing of printed products such as labels, packaging films, and paper
Label roll slitting: In the adhesive label printing production line, the double angle circular knife can cut the printed large format label mother roll into narrow rolls (such as 50mm, 100mm wide) that meet the end use specifications. Its double beveled edge design can reduce the contact area between the cutting tool and the label material, avoid scratching the printed pattern on the label surface, and ensure that the cutting edge is free of burrs and curled edges, meeting the requirements for automatic labeling machines.
Packaging film slitting: For BOPP, PET and other printed packaging films (such as food packaging bags, express bag printing rolls), the double angle circular knife can achieve high-speed slitting, and the high wear resistance of the cutting edge is suitable for the continuous cutting needs of the film, preventing film stretching deformation or uneven slitting caused by tool passivation, ensuring the sealing performance and appearance quality of the packaging film.
Paper roll cutting: For printing paper rolls such as copperplate paper and matte powder paper, the double angle circular knife can correctly cut paper rolls of different widths, which are used for subsequent cutting of brochure pages and promotional flyers. The cutting surface is flat and smooth, avoiding burrs and powder loss at the edges of the paper.
2. Die cutting and line pressing auxiliary processing of printed materials
In the printing and die-cutting process, a double angle circular knife can be used as a specialized tool to complete special shape cutting or line pressing operations in conjunction with a die-cutting machine
Cutting of irregular printed products: For irregular labels, anti-counterfeit labels, greeting cards and other printed products, customized double corner circular knives can achieve cutting of complex shapes such as curves and sharp corners. The accuracy of the cutting edge can ensure the consistency of the irregular edge and improve the beauty of the product.
Cutting and creasing of corrugated cardboard boxes after printing: On the corrugated cardboard box production line, a double corner circular knife can be used for cutting and creasing of printed cardboard boxes. One side of the blade is responsible for cutting the corrugated paper, and the other side can assist in pressing the crease line. Two processes can be completed at once, improving the efficiency of cardboard box processing, with clear creases and neat cutting edges, making it easy to fold and shape the cardboard box.
3. Layering and trimming of printed composite films
Printed composite films (such as aluminum-plastic composite films and paper plastic composite films) may have uneven or excess composite layers at the edges after lamination. Double angle circular knives can be used for trimming the edges of composite films, cutting off irregular parts of the edges to ensure consistent width of the composite film; At the same time, for some composite printed products that require layering, the sharp edge of the double angle circular knife can achieve correct peeling of the composite layer, avoiding damage to the printed layer.
The pre press substrate of flexographic printing is cut in the pre press process of flexographic printing. The double angle circular knife can be used for the pre-treatment cutting of the substrate, cutting the roll shaped printing substrate (such as non-woven fabric, film, paper) into specifications that match the width of the printing plate, ensuring that the substrate runs smoothly during printing, avoiding overprint deviation caused by uneven substrate width, and improving printing accuracy.