The basic understanding and core characteristics of knife plate spring pads
The knife plate spring pad is an indispensable accessory component in the die-cutting industry. It is mainly applied in the knife plate assembly of die-cutting equipment such as flat-to-flatbed and rotary to rotary, and undertakes key functions such as buffering, positioning, and auxiliary waste removal. Its core function is to compensate for the gap between the die-cutting plate and the die-cutting material through its own elastic deformation, ensuring that the die-cutting edge can be evenly stressed, improving the die-cutting accuracy, while reducing the wear of the edge and extending the service life of the die-cutting plate.
From the perspective of material classification, the mainstream materials of knife plate spring pads include polyurethane (PU), rubber, silicone, etc. Among them, polyurethane material has become the most widely used type at present due to its excellent elasticity, wear resistance and tear resistance. Elastic pads made of different materials vary in indicators such as hardness, rebound rate, and temperature resistance. For instance, rubber elastic pads have excellent elasticity but relatively weak wear resistance, while silicone elastic pads have outstanding temperature resistance but are more expensive. The appropriate material should be selected based on the specific application scenario.
The core characteristics of the knife plate spring pad can be summarized in three points: First, precise elastic control. The hardness of the spring pad needs to match the height of the knife plate and the thickness of the die-cut material. Generally, the hardness range is between Shore A 30 and 80, ensuring the buffering effect while avoiding excessive deformation. Secondly, it should have stable physical properties, including good wear resistance, anti-aging property and solvent resistance, to adapt to long-term and high-frequency die-cutting operations. Thirdly, precise dimensional accuracy is essential. The width and thickness of the spring pad must precisely match the grooves of the knife plate to prevent dimensional deviations from affecting the die-cutting effect.
In addition, the structural design of the knife plate spring pad also directly affects its usage effect. Common structures include solid strip type, hollow strip type, and grooved type, etc. Solid spring pads are suitable for large-scale die-cutting scenarios. Hollow spring pads have stronger elasticity and are lighter in weight. Spring pads with grooves are convenient for waste removal. The corresponding structure can be selected according to the complexity of the die-cutting process.