The application scenarios and adaptation selection logic of the knife plate elastic pad
The application scenarios of die-cutting spring pads cover multiple fields such as packaging and printing, electronic processing, leather products, and non-woven fabric processing. The die-cutting demands of different industries vary greatly. Therefore, the selection of spring pads should follow the core logic of "material matching, parameter matching, and structural matching".
In the packaging and printing industry, corrugated box die-cutting is one of the main application scenarios for knife plate spring pads. In this scenario, the thickness of the processed material is relatively large (typically 3mm-10mm), and the die-cutting pressure requirement is high. Therefore, polyurethane elastic pads with A Shore A hardness of 60°-80° should be selected, and the thickness is recommended to be 3mm-5mm. Structurally, striped or mesh patterns are preferred to ensure smooth exhaust during the die-cutting process and prevent problems such as corrugated paper crushing and edge fringing. In the label printing die-cutting scenario, the materials are mostly thin and light materials such as films and coated paper (with A thickness of 0.1mm-0.5mm), and the die-cutting precision requirements are extremely high. It is necessary to select soft polyurethane spring pads with a hardness of Shore A 30°-50°, a thickness of 1mm-2mm, and a flat sheet structure can meet the requirements. Its soft feature can prevent the material surface from being crushed. At the same time, ensure that the blade cuts precisely.
In the electronic processing industry, knife plate spring pads are mainly used for die-cutting of precision electronic components such as mobile phone films, battery separators, and FPC flexible circuit boards. This scene has more stringent requirements for the wear resistance and temperature resistance of the spring pad. High-purity polyurethane material should be selected, with A Shore A hardness of 40°-60°. At the same time, it must have good dimensional stability to avoid deformation of the spring pad due to long-term high-temperature operation (the equipment temperature during die-cutting may reach 50 ° -80 °). In addition, as the die-cutting of electronic components is mostly a multi-layer material composite processing, the uniformity of the pressure of the spring pad is of vital importance. Usually, a high-density spring pad with a density of ≥1.1g/cm³ should be selected to ensure that the multi-layer materials are cut synchronously without any adhesion.
In the processing scenarios of leather and non-woven fabrics, materials with high toughness and uneven thickness are prone to problems such as material jamming on the cutting edge and material stretching and deformation during die-cutting. Therefore, polyurethane elastic pads with fast elastic recovery speed and high tensile strength (≥15MPa) should be selected. The hardness of Shore A is 50°-70°, and the thickness is 2mm-4mm. The grid structure can enhance the pressure dispersion effect and reduce the probability of material tensile deformation.