The emergence of paper cutting machines is due to people's dissatisfaction with the efficiency of manual paper cutting. After the development of paper cutting machines, people relied heavily on this product, to the extent that manual paper cutting was almost extinct. The editor of this article will analyze the reasons for the phenomenon of upper and lower knives in paper cutting machines:

Programmable paper cutting machine

1. Knife bluntness

When cutting, it is necessary to control the cutting amount, change the tool frequently, and use a fast knife. If the knife is too blunt, it not only affects the quality of paper cutting, but also affects the accuracy and lifespan of the machine, and in severe cases, mechanical accidents can occur.

2. Blade cause

Normally, the blade is parallel to the platform plane. When the blade is too high or too low, it is also easy to experience the phenomenon of upper and lower blades. At this point, it is necessary to adjust the blade so that it is parallel to the platform plane.

3. The movement direction of the cutterbed is not perpendicular to the plane of the paper feeding platform

If the gap between the cutterbed and the slider is just right, it is necessary to adjust the platform plane to be perpendicular to the direction of the cutterbed movement. Generally, it is only necessary to adjust the height of the support rod behind the platform and the ground support.

4. The gap between the cutterbed and the slider is too large

When wear or improper adjustment causes excessive clearance between the tool holder and the slider (usually 0.1mm), resulting in unstable tool holders, it can cause the phenomenon of tool up and tool down. At this point, it is necessary to readjust the gap between the tool holder and the slider.

5. Reason for operation

There are two situations: ① not pressing the weight during operation, and directly cutting the paper after positioning, resulting in the phenomenon of upper and lower knives. When cutting, the weight should be compacted first before cutting; ② When pushing the paper stack forward, insufficient or excessive force may cause the paper to bounce back, resulting in skewed upper and lower knives. Standardize the operation when cutting paper.

6. The angle adjustment of the blade is incorrect

The angle of the blade should be determined based on the paper being cut. For thin, loose, and soft paper, the blade angle should be small, usually between 25 and 30 degrees; Thick, solid, and hard paper should have a large blade angle, usually 30-35 °. Otherwise, it is easy to experience upper and lower knife phenomena, and accelerate blade passivation.

In fact, there are many reasons for the phenomenon of upper and lower knives in paper cutting machines. I have compiled some for everyone to understand. Paper cutting machines are currently widely used in various industries. If you have more information about this aspect, please feel free to call our company. Rui'an Dapeng Printing Machinery Co., Ltd. specializes in producing and supplying paper cutting machine equipment with stable performance, high cost-effectiveness, and long service life.