With the vigorous development of the printing and packaging industry, people pay more and more attention to post-press processing die-cut production and application of die-cut materials. In the Hong Kong market, fierce market competition has begun between various die-cutting knives. For a time, various brands are dazzling, providing customers with ample choices, but also increasing the difficulty of choice. Among so many brands, as users, how can they "choose the good ones and follow them"?
Characteristics of high-quality die cutter
1. Selection of high-quality steel: the molecular structure of the steel is tight, the blade is flexible, and there is not much rebound after bending, and the molecular structure remains tightly connected.
2. Superb surface decarburization treatment: the brittle carbon molecules are removed from the surface of the die cutter, so that the blade will not be brittle when it is bent, which will cause the blade to break. It looks like a layer of soft tissue wraps the blade body, making it easier to bend and shape.
3. Excellent heat treatment: The die knives can be adjusted to different hardness according to different requirements of customers, and the blade body can be adjusted to be flexible for bending and the blade peak to be hardened to make it durable.
4. Extremely high precision: The higher the accuracy of the die cutter, the shorter the pressure adjustment time of the die cutter, the lower the mechanical wear, the faster the production speed, and the better the die cutting effect. Especially die-cutting of self-adhesive trademarks, die-cutting knives without precision are simply unqualified.
5. Should have more specifications and models for customers to choose: die cutter choice should have more specifications and models for customers to choose: die cutter choice should be based on three principles to choose: (1) whether the production of long version; (2) Whether the customer's requirements are high; (3) Whether the patterns cut by the die are complicated. Choosing the most suitable model and specification of die-cutting knife is the key to die-cutting quality assurance.
What if Rubao distinguishes between high-quality and inferior die-cutting knives?
1. Knife blades with hardened blade peaks are usually called soft blades due to their soft blades and hard blade peaks. In soft knives, the thickness of the quenching area has a great influence on durability. The quenching area is large, and the ability to support the mechanical pressure transmitted by the blade body is greater. On the contrary, the contact area of ​​the hard blade and the soft blade is less At this time, the hard part will sink into the soft part, or it will easily fall off, and the supporting force will be insufficient or reduced to zero, that is, the life of the knife will be shortened. Of course, the area of ​​the quenching layer cannot be increased without limit. Too much quenching area will affect the bending of the die cutter. Due to the importance of the quenching layer, and the larger the quenching layer area, the higher the cost of the knife, so some unscrupulous manufacturers even apply a layer of ink color to the blade peak by the method of color coating, which is said to be quenching treatment to deceive users As a user, you should have a clear mind and do n’t be deceived by counterfeit knives.
2. The higher the precision of the die cutter, the better the quality and the higher the grade. Take the Bohler (Austria) die-cutting knife as an example, its precision reaches ± 0.02mm, and the precision of the A, B, C type knife itself can reach ± ​​0.007mm. The accuracy can be up to ± 0.007mm (the same for Class B and C), which is convenient for users. As long as the user specifies the purchase of similar knives, the price has not changed, and the precision tolerance can be obtained within ± 0.08mm, and the ordinary backing paper is only 0.05mm thick. It is difficult to make up with the backing paper. Especially for self-adhesive die-cutting, which requires extremely high precision, these rough die-cuts are simply not qualified.
3. The selection of varieties with different hard bottoms is beneficial to adapt to different needs. Some brands only have one or two hardness knives, which is not competent for thick materials. On the other hand, if there are only very hard knives, it is very problematic for wood patterns with complex patterns. Or sometimes users are reluctant to use the same knife in die-cutting production with different requirements, and the best results are not achieved, so the choice of multiple varieties is the characteristic of high-quality brands.
Selection of high and low peaks and knife patterns
When choosing a high-quality die-cutting knife, pay attention to the choice of peak knife and short peak knife according to the thickness of the material being cut. The peak knife can cut both thin paper and thick paper, and it can be used on a single sheet of automatic die-cutting machine. It can also be used on a hand-cutter die-cutting machine that cuts two or three sheets of paper at the same time, and is widely used. However, if the user's products are single and thin cardboard, such as cigarette pack manufacturers, long-term die-cutting of cigarette cases with a thickness of less than 400 grams, then it is recommended to use short peak knives, because these factories usually use automatic die-cutting machines. Single-sheet paper die-cutting, fast speed, large quantity, short peak knife can meet. For the requirements of longer version and more durability, because the stiffness of the peak of the dwarf knife is higher than that of the peak, it is more stable under pressure and more durable.
In addition, when selecting a high-quality die-cutting knife, pay attention to the horizontal or straight grain processing of the blade peak. The blade with a horizontal grain is better for die-cutting paper, more durable, and has higher stability and accuracy, and it is not easy to be bent. Cracking, and the surface of the straight-grained knife seems to be very sharp. It will be cut on the surface of the steel plate when die-cutting. It is easy to be blunt after a short time. At the same time, it is easy to crack after bending. Straight-line knives are relatively smooth, and the best choice for die-cut paper products is to use horizontal-line-process die-cutting knives.
With the high speed of today's automatic die cutting machines, the requirements for die cutters are getting higher and higher, and the die cutter production plant is stimulated to develop high-standard products. The Supreme knife introduced by the Austrian company Bohler, which leads the world's die-cutting knife production technology, is coated on the blade peak of a high-quality die-cutting knife with a special metal coating to fill the capillary pores and gap pits, making the knife The peak is smoother, the friction between the knife and the paper is smaller, the mechanical wear is reduced, and it is not easy to produce paper dust. It is more suitable for die-cutting and remaking paper; especially for high-demand products, such as medicine boxes, food boxes, and packaging boxes that are not allowed to stick to paper dust, Supreme knife should be used, up to 2 million die-cutting, which is currently the most high-end die The cutter is called "the king of die cutter".
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