Creasing strips and knife plate spring pads - the "golden pair" of die-cutting and creasing processes

In the die-cutting and creasing process of the printing and packaging industry, there are two seemingly insignificant but crucial accessories. They are like the "gears" in precision instruments, jointly ensuring the stability of product quality and the improvement of production efficiency. These are creasing strips and die-cutting plate spring pads. Many people only focus on the precision of die-cutting knife plates and the setting of pressure parameters, but overlook the core role of this "golden pair". Little do they know that their performance directly determines the texture and pass rate of the packaged finished products.

Creasing matrix, as the name suggests, are special accessories used to press clear creases on materials such as paper and cardboard. It is usually made of rubber or polyurethane materials with excellent elasticity. According to different paper thicknesses and creasing requirements, it is divided into different heights, hardness and cross-sectional shapes. During the die-cutting process, the creasing matrix is fixed in the crease groove of the die plate. When pressure is applied to the die plate, the crease strip exerts a uniform squeezing force on the material, forming creases of appropriate depth and straight lines. High-quality creasing strips not only ensure clear creases, avoiding problems such as "broken lines" and "hidden lines", but also reduce wear on the tool plate and extend its service life. For instance, in the production of corrugated boxes, choosing indentation strips of matching hardness for different corrugation types of corrugated cardboard can make the corners of the box neat after folding, enhancing the load-bearing capacity and aesthetic appeal of the packaging.

The core function of the knife plate spring pad, which complements the creasing matrix , is "buffering and resetting". At the moment when the die-cutting knife cuts the material, the elastic pad of the knife plate will undergo elastic deformation due to pressure. On the one hand, it absorbs part of the impact force to prevent the blade from cracking or curling due to excessive instantaneous force. On the other hand, when the pressure is released, the elastic recovery force of the elastic pad can quickly separate the cut material from the blade, preventing the material from adhering to the blade edge and achieving continuous and efficient production. The selection of the knife plate spring pad also requires careful consideration. According to the die-cutting speed, material properties and blade type, products with different densities and elasticity need to be matched. In high-speed die-cutting processes, high-density die-cutting plate spring pads can better withstand frequent impacts, maintain stable buffering performance, reduce the number of shutdowns for cleaning, and significantly improve production efficiency.

The synergy of this "golden pair" is the key to achieving precision and efficiency in die-cutting and creasing processes. The indentation strip ensures the "appearance level" and "practicality" of the product, while the knife plate spring pad guards the "stability" and "continuity" of production. Today, as the packaging industry increasingly demands higher product quality, paying attention to the selection, use and maintenance of creasing strips and knife plate spring pads is undoubtedly an important link to enhance the core competitiveness of enterprises.