Paper cutting machine and paper reverse curling device and method thereof

Abstract

The invention discloses a paper cutting machine and a paper reverse curling device and method thereof. A rack, a roller shaft arranged on the rack, a rubber bottom roller arranged on the roller shaftin a sleeving manner, a swinging arm rotationally arranged on the rack or the roller shaft around the shaft axis of the rubber bottom roller, and reverse curling shaft used for compressing paper ontothe rubber bottom roller are included; the reverse curling shaft is arranged on the swinging arm, and the plane formed by the shaft axis of the rubber bottom roller and the shaft axis of the reverse curling shaft and the paper surface form an included angle large than 0; and the paper reverse curling device at least have two work states, and the included angles are different in the two work states. The paper reverse curling device is simple in structure, convenient to use, and free of influences of the tensile force of the paper, so that curled fiber is more prone to reverse deformation, levelling of large gram weight, high stiffness and small curling diameter curled paper is facilitated, and a paper coating cannot be easily damaged.

Description

technical field [0001] The invention belongs to the field of paper cutters, and relates to a paper cutter and its paper decurling device and method. Background technique [0002] A high-speed paper cutter is a device for slitting paper or cardboard rolls. The anti-curling device is an essential part of the high-speed paper cutter and plays an extremely important role. At present, various high-speed paper cutters on the market are equipped with paper decurling devices. Such as Figure 1 to Figure 3 In the three kinds of paper decurling devices shown, the reverse side of the paper curl is passed through a decurling shaft and paper guide roller with a diameter of less than 50mm, and the reverse side of the paper curl is adjusted according to the degree of paper bending. The size of the wrap angle α is used to reversely deform the curled paper fibers by mechanical force, so as to achieve the purpose of flattening the paper. figure 1 , the unwinding shaft uniaxially swings; ...

AI Technical Summary

Problems solved by technology

[0005] 2) When the coated paper with high stiffness is decurled, the angle α of the paper at the reverse crankshaft is too large, and the decurling effect is not good; the angle α of the paper at the reverse crankshaft is too small, and the coating layer is easy to wrinkle and damage the coating

[0006] 3) When the included angle α of the paper at the reverse crankshaft is constant, when the paper tension becomes smaller, the paper becomes looser, the bending resistance becomes worse, and the anti-curl effect becomes worse

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