What Type of Blade Will be Applied on Corrugated Cardboard Production Line

On the corrugated paper production line, various specialized cutting tools are used to complete various slitting and cutting processes from raw paper processing to final carton forming. According to different production processes, the main types of cutting blades used include:

1. Longitudinal thin blade: It's used to cut wide corrugated cardboard into narrow strips of paper of the desired width along the longitudinal direction. This type of blade requires extremely high precision and wear resistance, and common materials include:

1) Tool steels (such as SKD11, 9SiCr, chrome steel): suitable for low-speed production lines below 60 meters per minute, with high cost-effectiveness.

2) High speed steel (such as W6Mn5Cr4V2, W18Cr4V): suitable for medium speed production lines of 80-120 meters per minute, with a hardness of HRC63-65 and a service life of about 200000 meters.

3) Hard alloy class (tungsten steel, YG class): specially designed for high-speed production lines above 160 meters per minute, with a hardness exceeding HRC75 and a service life of up to 4 million to 8 million meters. It has excellent wear resistance, but the cost is high and requires diamond grinding wheels for grinding.

2. Cross cutting blades: used to cut continuous corrugated cardboard horizontally to a set length, forming a single cardboard box mould. The common structure is inlaid, with the blade mostly made of 45 # steel or A3 steel, and the blade embedded with high-speed steel (such as 6CrW2Si) or hard alloy. The blade angle is usually between 38-48°.

3. Spiral cross cutting blade: a specially designed cross cutting blade with a spiral tooth shaped blade that can effectively reduce vibration and noise during paper cutting, improve cutting smoothness, and is commonly used in high-speed automatic cross cutting machines. The material is mostly inlaid with sharp steel or tungsten alloy.

4. Slotting blades: used to make slots for folding and forming on corrugated cardboard, usually used in conjunction with upper and lower knives, with a required clearance of less than 0.05mm. The material is mostly SKD11 or 9SiCr1.

The selection of these cutting blades needs to be comprehensively determined based on the production line speed, equipment accuracy, cost budget, and cardboard quality requirements. High speed production lines generally tend to use hard alloy cutting tools to reduce the frequency of downtime and blades changes, while older equipment often uses economical tool steel cutting blades.