Rotary knife paper cutting device

Abstract

The invention discloses a rotary knife paper cutting device. The device comprises a clamping and conveying device, a paper cutting roller located on one side of the clamping and conveying device, a paper cutting bottom knife located below the paper cutting roller, a conveying device located on the side, away from the clamping and conveying device, of the paper cutting bottom knife, a lifting device installed at one end of the clamping and conveying device and a first driving device used for driving the clamping and conveying device and the paper cutting roller; and the lifting device can drive the clamping and conveying device to ascend and descend so as to clamp and convey paper, a paper cutting knife of a spiral structure is arranged on the paper cutting roller, the spiral angle of the paper breaking knife is an acute angle, and when the first driving device drives the paper cutting roller to rotate, the paper cutting knife makes contact with the paper cutting bottom knife so as to cut off the paper. According to the rotary knife paper cutting device, the spiral paper cutting knife is adopted, the effect of cutting off paper is achieved in a shearing mode, impact force borne by the paper cutting knife in the paper cutting process is greatly reduced, and therefore the requirement for the strength of the paper cutting knife is reduced, the diameter of the paper cutting knife is reduced, the equipment structure is simplified, and the replacement cost of the paper cutting knife is reduced.

Description

technical field [0001] The invention relates to the technical field of paper cutting equipment, in particular to a rotary knife paper cutting device. Background technique [0002] The paper cutter is a special equipment that cuts the printed continuous paper into single sheets of the same specification through the paper cutter along the transportation line. Compared with the traditional manual cutting, the extensive use of the paper cutter now makes the production preparation The time is shorter, the cutting accuracy is higher, and it can meet different cutting needs. At present, most of the paper cutters of domestic flexo printing machines use the form of hob cutting, that is, the knife is installed on the bottom roller, and the cutting machine is rotated and rolled. However, since this method of cutting requires positive contact between the knife and the bed knife, the friction between the two is relatively large at the moment of contact during the cutting process, and lon...

AI Technical Summary

Problems solved by technology

[0002] The paper cutter is a special equipment that cuts the printed continuous paper into single sheets of the same specification through the paper cutter along the transportation line. Compared with the traditional manual cutting, the extensive use of the paper cutter now makes the production preparation The time is shorter, the cutting accuracy is higher, and it can meet different cutting needs. At present, most of the paper cutters of domestic flexo printing machines use the form of hob cutting, that is, the knife is installed on the bottom roller, and the cutting machine is rotated and rolled. However, since this method of cutting requires positive contact between the knife and the bed knife, the friction between the two is relatively large at the moment of contact during the cutting process, and long-term use is likely to cause The cutting edge is seriously worn, which leads to different cutting sizes of paper, which makes a lot of raw materials scrapped, so the cutting edge needs to be replaced frequently, which increases the equipment cost

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