Shenhua Printing Material Knife Plate Spring Pad: A Coordinated Adaptation and Layer Control Scheme for Multi-material Composite Die-cutting

Multi-material composite die-cutting (such as paper-plastic composite, aluminum paper composite, film-paper composite, etc.) is widely used in high-end packaging, food packaging, electronic packaging, and other fields. The core pain points in these scenarios are the significant differences in hardness, toughness, and thickness of different materials, which often lead to problems such as "one material is cut while the other is not" and "composite layer delamination, edge burrs" during die-cutting. Conventional elastic pads are difficult to meet the die-cutting requirements of different materials. Based on the mechanical properties of multi-material composite die-cutting, Deephua Ink Materials has developed a collaborative and adaptable solution to achieve synchronous and precise die-cutting and layer control of different materials.

In the design of elastic pads, Deephua Ink Materials innovatively adopts a gradient hardness and layer-adaptive structure. According to the layering characteristics of the composite materials, the elastic pads are divided into different hardness areas - for materials with higher hardness (such as plastic, aluminum foil), the high-hardness area (Shore A 60-65) is adapted to ensure complete cutting; for materials with lower hardness (such as paper, film), the low-hardness high-rebound area (Shore A 40-45) is adapted to avoid material damage and stretching; for the bonding part of the composite layer, the medium-hardness transition area is adapted to reduce the damage to the composite layer caused by die-cutting impact and prevent delamination. At the same time, the thickness of the elastic pad is optimized, and a gradually varying thickness elastic pad is customized according to the total thickness of the composite materials to ensure uniform pressure transfer to each layer of material and achieve synchronous cutting.

In the aspect of process adaptation, Deephua Ink Materials provides "elastic pad + tool + pressure" collaborative optimization suggestions. Based on the characteristics of the composite materials, the recommended cutting tool type and pressure parameters are provided, guiding customers to adjust the cutting speed to avoid the displacement of the composite layer and incomplete die-cutting caused by too fast speed. For composite materials prone to delamination (such as aluminum foil composite paper), the surface of the elastic pad is treated with anti-static and anti-slip processing to enhance the adhesion to the composite materials, reduce relative displacement during die-cutting, and avoid adhesion and sticking caused by static electricity.

After an advanced food packaging enterprise applied this solution, the delamination rate of paper-plastic composite packaging die-cutting decreased from 7% to 0.3%, the cutting defect rate decreased from 5% to 0.4%, and the die-cutting efficiency increased by 30%, completely solving the core pain points of multi-material composite die-cutting. Deephua Ink Materials' collaborative adaptation solution provides efficient and stable material support for multi-material composite die-cutting scenarios, helping enterprises improve product quality and production efficiency.