The edge of the blade has four types of low peaks and unilateral peaks (see Figure 1).
Low-cut knife is the most widely used die cutter. Although the blade is very small, it seems to be not sharp enough. In fact, the paperboard with a die cut of 450g/m2 or less is less than O. In the case of 5mm material, the low peak is the most ideal form, and the stable thickness of the blade support plays a very good role in the transfer of pressure. The commonly used low-peak knife has an angle of 52 degrees, which is a very stable basic angle. The smaller the edge angle, the smaller the die-cut resistance, which is naturally sharper and easier to cut through. However, the smaller the edge angle, the harder it is to ensure that it is sharp and the cutting edge is correctly broached. The 42-degree blade manufacturing process for sharpening the cutting edge is relatively simple. At present, there are many companies that can produce, but the performance of the blade is much inferior to that of the blade produced by the broaching method. The 42-degree blade manufactured by broaching has a long life when die-cutting jams, and can reduce the remarkable characteristics of paper powder.
The peak knives are designed for die-cutting thick materials. Their long blade can greatly reduce the die-cut resistance, reduce the die-cutting pressure, and at the same time provide a good cutting edge for thick materials.
Unilateral knives are used for die cutting of closed materials or where straight edges are required;
Unilateral peak knives are used for die cutting thick materials.
The type of blade is basically divided by the hardness of the blade and the blade, and the structure of the material of the blade blade, and is generally divided into two types of blade: hardened and unquenched.
The combination of a hardened blade and a flexible blade achieves a good combination of blade bending and durability.
The above two types of blades are divided into the types shown in Table 3 according to the purpose of use. They have different performance when cutting different products.
(to be continued)
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