Shenhua High-Speed Die-cutting Special Knife Plate Spring Pad: Break through production capacity bottlenecks, empower efficient mass production in the printing and packaging industry

With the explosive growth of e-commerce logistics and the fast-moving consumer goods industry, the order structure of the printing and packaging industry has been continuously transforming towards large-scale and mass production. Fully automatic high-speed flat-to-flat die-cutting machines and round-to-round die-cutting machines have become standard equipment for medium and large-sized packaging enterprises. The die-cutting speed has jumped from the traditional dozens of times per minute to 300-500 times per minute, and some rotary die-cutting equipment even exceeds 800 times per minute. However, behind the acceleration of production capacity, countless enterprises have fallen into the predicament of "improving equipment efficiency but lagging in consumables" - as the core supporting consumables for die-cutting, the knife plate spring pads have become the core bottleneck that restricts the release of equipment capacity and the improvement of production efficiency. After more than twenty years of deep involvement in the die-cutting supporting field, Shenhua, closely following the core needs of high-speed mass production in the industry, has created a product system of high-speed die-cutting-specific knife plate spring pads, solving the industry pain points in high-speed die-cutting scenarios from three dimensions: formulation, structure, and process. This enables printing and packaging enterprises to break through the last mile of efficient mass production.

The continuous impact conditions of high-speed die-cutting have put forward extremely demanding requirements for the performance of knife plate spring pads that exceed the conventional scenarios. It also greatly amplifies the performance shortcomings of ordinary general-purpose spring pads. The vast majority of low-price general-purpose spring pads in the industry have four fatal problems in high-speed die-cutting scenarios: First, the anti-fatigue performance is seriously insufficient. Ordinary spring pads use low-end polyurethane formulations, with loose molecular cross-linking structures. After tens of millions of die-cutting operations, they will experience elastic collapse and excessive compression permanent deformation, resulting in continuous fluctuations in die-cutting depth. Enterprises have to frequently stop production to replace spring pads and adjust die-cutting pressure. A high-speed die-cutting machine with a speed of 12,000 times per minute will suffer a loss of tens of thousands of yuan due to a single stoppage for pad replacement; Second, the risk of high-speed shifting and detachment of glue is high. Ordinary spring pads have insufficient back-grip adhesion and poor shear resistance. Under high-speed continuous impact, they are prone to warping, shifting, and even detachment, not only causing the entire batch of products to be scrapped, but also potentially causing severe accidents such as knife and die breakage and equipment damage; Third, the quality of the joint is out of control. Ordinary spring pads have large height differences in the对接 seams， and under high-speed die-cutting， they are prone to jumping， uneven pressing， and poor quality at the seams， far exceeding the quality shortcomings in other areas， becoming a quality bottleneck in large-scale production； Fourth， the wear resistance is insufficient. Under high-speed friction， the surface begins to pit and shed debris， polluting the printed products and accelerating the wear of the knife and die， significantly increasing the cost of consumables for enterprises.

After years of deep involvement in the die-cutting supporting field， Shenhua has deeply understood the core pain points of high-speed die-cutting scenarios and relied on its independently developed polymer material laboratory to achieve full-chain technological breakthroughs for knife plate spring pads under high-speed continuous impact conditions.