Shenhua Printing Plate and Die Pad: With green technology innovation, it empowers the packaging industry in its transition to carbon neutrality.

In the die-cutting workshop of the printing and packaging factory, the most common production pain points are broken lines, burrs, insufficient cutting, and rapid wear of the die-cutting molds. When encountering these problems, the first reaction of most enterprises is to replace the die-cutting molds, grind the cutting edges, and adjust the die-cutting pressure. However, they overlook a core logic: the core of the die-cutting process is the collaborative cooperation between the die-cutting molds and the die-cutting plate spring pads. The two are an organic whole that complement each other, rather than two independent components. The widespread "overemphasizing die-cutting molds and neglecting spring pads" cognitive误区 in the industry is precisely the root cause of most die-cutting defects.

After 22 years of deep involvement in die-cutting consumables, Shenghua Printing Materials firmly believes that without an appropriate die-cutting plate spring pad， even the most advanced imported die-cutting molds cannot achieve their intended performance. Based on this concept， Shenghua Printing Materials broke the traditional industry model of "first making the die-cutting molds， then matching the spring pads"， and created a full-process collaborative adaptation solution for die-cutting molds and spring pads. It deeply involved from the die-cutting mold design stage to achieve precise matching of die-cutting mold parameters and spring pad performance， fundamentally solving the core pain points of the die-cutting process and helping printing enterprises achieve dual improvements in die-cutting quality and production efficiency.

The collaborative adaptation of die-cutting molds and spring pads runs through the entire die-cutting production process. The majority of die-cutting defects in the industry stem from the mismatch of parameters between the two. The most basic and common one is the mismatch between the tip height and the thickness of the spring pad. The core principle of die-cutting is to provide reverse supporting force for the tip through the rebound compression of the spring pad， achieving precise cutting of the substrate. The industry standard is that the natural height of the spring pad should be 0.1-0.2mm higher than the tip height. However， in actual production， many enterprises use spring pads with a height lower than the tip height， resulting in insufficient support for the tip， causing cutting failure， edge burrs， and accelerating the wear of the die-cutting molds； or using spring pads with excessively thick materials， which excessively compress the substrate， causing paper to burst， surface indentation deformation， and even damaging the tip， significantly shortening the service life of the die-cutting molds.

The second core mismatch is the mismatch between the tip angle and the hardness of the spring pad. Different substrates and different die-cutting requirements require different angles for the tip， and the corresponding hardness of the spring pad must also be adjusted simultaneously. For thin paper， art paper， and self-adhesive labels， 30°-42° sharp-angle tips are used， and corresponding low-hardness flexible spring pads with 30-40 Shore A hardness are required to avoid paper burst and surface scuffing； for thick card paper， corrugated paper， and hard cardboard， 52°-60° blunt-angle tips are used， and corresponding high-hardness spring pads with 50-70 Shore A hardness are required to provide sufficient reverse supporting force to ensure the tip fully penetrates the substrate. Many enterprises use the same hardness of spring pads to adapt to all tip angles of die-cutting molds， naturally resulting in various die-cutting defects and exacerbating the uneven wear of the die-cutting molds.

The third key mismatch is the disconnection between the die-cutting line arrangement and the installation method of the spring pad. Different types of die-cutting lines have completely different requirements for the arrangement of spring pads： continuous die-cutting lines such as straight lines and rounded corners require the spring pad to be arranged parallel to the die-cutting line and maintain a safe distance of 0.5-1mm from the tip； intermittent die-cutting lines such as dotted lines and punching lines require segmented symmetrical arrangement of the spring pad to ensure uniform force on each section of the tip； complex irregular die-cutting lines and fine镂空 die-cutting lines require customized segmented ultra-fine spring pads that precisely fit the direction of the die-cutting line. The arrangement of spring pads in many enterprises is chaotic， not only causing uneven die-cutting pressure and edge burrs， but also causing local excessive force on the die-cutting molds， resulting in tip cracking， die-cutting mold deformation， and other problems.

To address the common die-cutting mold-spring pad mismatch pain points in the industry， Shenghua Printing Materials has created a full-process collaborative adaptation service system， covering die-cutting mold design， spring pad selection， installation and commissioning， and daily maintenance， achieving full-dimensional precise matching of die-cutting molds and spring pads. During the design stage of the die, the professional die-cutting engineers of Shenhua Ink Materials will deeply participate, collaborating with the process teams of the die-making factory and the printing factory. Based on the die-cutting substrate, product structure, and equipment parameters, they will simultaneously optimize the blade height, blade angle, and blade line arrangement of the die. At the same time, they will provide corresponding hardness, thickness, and specification selection schemes for the spring pads. From the design source, they will avoid the problem of parameter mismatch and achieve the inherent compatibility between the die and the spring pad.

During the production application stage, Shenhua Ink Materials provides customers with one-on-one on-site installation and commissioning services, guiding the machine operators to arrange the spring pads in a standardized manner. They optimize the installation method for different blade lines and precisely adjust the die-cutting pressure, bonding speed, etc., according to the die parameters. This enables the coordination between the die and the spring pad to reach the optimal state, and solves problems such as line breakage, insufficient cutting, and rapid die wear on-site. At the same time, Shenhua Ink Materials also provides customers with daily maintenance plans for the die and spring pad, guiding customers to regularly inspect the blade wear condition and adjust the spring pad parameters. They promptly replace the partially worn spring pads, thereby extending the service life of the spring pad by more than 30% and significantly reducing the cost of die procurement for enterprises.

Today, Shenhua Ink Materials' die - spring pad collaborative adaptation solution has served thousands of printing and packaging enterprises across the country, helping customers solve long-standing cutting defects, increasing the die-cutting yield to over 99%, extending the die life by 30%, and reducing the downtime and commissioning time by 70%. The essence of die-cutting is the collaborative cooperation between the die and the spring pad, and both are indispensable. In the future, Shenhua Ink Materials will continue to deepen the research and development of die - spring pad collaborative adaptation technology, deepen cooperation with domestic die-making enterprises, and jointly promote the technological upgrade of die-cutting processes, providing more efficient and stable full-process die-cutting solutions for the printing and packaging industry.