Features of the large roller dust-free automatic card paper/gray board and paperboard grooving machine: 1. This machine is specially designed for V-grooving various types of boards such as industrial paperboard, card paper over 200 grams, gray board, and density board. 2. An automatic feeding machine is adopted. The entire surface of the slotted cardboard rotates on the roller surface, ensuring precise and accurate slotting without any deviation or movement. It features high precision, fast speed, and wear-resistant cutting tools. 3. Slotting effect: No burrs, no dust, smooth V-groove surface, and adjustable depth. 4. Environmental protection and energy conservation: Total power consumption of 1.75Kw, slotted cardboard, low noise. 5. Production efficiency: The automatic plate feeding speed can produce 60 meters per minute. 6. Durable cutting tools; It is equipped with a dedicated knife sharpener (easy to operate), and it only takes 2 to 3 minutes to sharpen one knife. 7. Adjustable knife Angle: Two knives are fixed simultaneously with a fixture to sharpen them well. There is no need to customize blades for different angles. They can be adjusted on the equipment by yourself. 8. Different thicknesses of cardboard can be slotted without adjustment, making it very convenient to use. 9. This machine is suitable for slotting top and bottom cover gift boxes, color boxes, wooden boxes and shoe boxes