1. The cutting line of the laser die is not perpendicular. After die-cutting for a period of time, the cutting rule originally installed on the curved part of laser die tilted.

2. The uneven thickness of the laser die board will cause the ejection rubber in different level height

3. The lifespan of the ejection rubber, the elasticity of the expired ejection rubber becomes worse, and the rebound speed becomes slower.

4. The quality of the glue used is poor, which makes the ejection rubber shift during die cutting, so that the die cutting is out of place

5. The hardness and height of the ejection rubber are not up to ideal requirements

6. The height of the creasing line is unreasonable, and the full creasing effect cannot be achieved

7. The groove width of the counter plate is not accurate enough