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2 types of slitting blades

Source:     Time:2020-05-08 Hits:

We all know that in the process of slitting line, we need to use one thing to slitting the materials. Do you know what it is? Yes! It’s the slitting blades! Today, we are going to talk about 2 types of slitting blades.

 slitting blade

1. Razor slitting blade

Razor slitting blades also referred to as “in-air slitting,” razor slitting blades are mounted to a bar and remain stationary during the slitting process. Razor slitting blade is easy and inexpensive to set up and is often used to convert films, plastics, tapes, ribbons, and vinyl. Using razor slitting, materials can be converted into very narrow slit widths while still producing very little dust, making it one of the cleanest methods of slitting. However, this type of slitting does have some limitations when cutting heavy materials and woven products. 

 

According to the width of the material to be cut, the material is conveyed across 1 to 120 blades on a single bar. So, during blade replacement, it is best if all blades on the bar are changed at the same time. The blades used for razor slitting are inexpensive and require more frequent changes than with other types of slitting blades

 

2. Shear slitting blade

Shear slitting blade is used in applications that require precision cuts. It is more expensive and difficult to set up than other slitting methods and is commonly used to convert heavy films, foils, paper, layered materials, and composites. Since shear slitting generates the least amount of heat, it is often used in environments that demand long run times.

 

Shear slitting requires two blades, a top blade known as the “male knife” and the bottom blade, known as the “female knife” or “anvil.” The male knife is adjusted at the cant angle so that the two blades to come into contact at the nip point, similar to a pair of hand scissors, which separates the material. To achieve the longest life, female knives should have a larger outer diameter than male knives and be manufactured from a material that has a higher hardness level.

 

Achieving the longest blade life in shear slitting operations requires appropriately setting the nip point. If the nip point is not set correctly, the blades will wear very quickly. Therefore, adequate and on-going training is required to ensure that all operators fully understand how to set up their operations correctly. 

 

Wuxi Bangzhou Machinery Manufacturing Co.,Ltd is a company specialized in slitting line, we also provide the slitting blade. We manufacture rotary slitter knives up to 1300mm(51.1811 inches) in outside diamter for slitting metal plates, coils etc. The slitting blades are available with ground, lapped or polished side faces. We have high cost performance and can punctual delivery. Welcome to contact with us!




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