Transversely cutting device of paper cutter with double flying knives and method for adjusting length and squareness of cut paper

Abstract

The invention provides a transversely cutting device of a paper cutter with double flying knives and a method for adjusting the length and the squareness of cut paper. The transversely cutting device comprises stands and a double-rotary knife roll, wherein both ends of the double-rotary knife roll are arranged on the stands by bearing supports, one bearing support is articulated with the stand at one side by a rotating axle, a knife roll adjusting mechanism is arranged on the stand at the other side, and a revolving knife hold-down mechanism is arranged on a connecting plate between the stand at one side and the stand at the other side, and articulated with the bearing supports by adjustable post rods and connecting pieces. The positions of the adjustable post rods are adjusted, which enables the bearing supports at both ends of the knife roll, the stand at both sides to be compressed or loosened. The speed ratio of the peripheral speed of the knife roll to the running line speed of paper is adjusted for adjusting the length of the cut paper. When cutting the paper, the knife roll rotates at a uniform speed all the time. A method that the angle between an axial line of the knife roll and the running direction of the paper is adjusted is adopted to ensure the cutting squareness. The invention can greatly decrease the installed capacity of an electric motor of the transversely cutting device and lower the complexity and the cost of manufacture.

Description

Technical field [0001] The invention relates to the technical field of paper cutter manufacturing, in particular to a double-rotary knife paper cutter cross-cutting device and a method for adjusting the paper cutting length and squareness. Background technique [0002] The existing machine that cuts roll paper (or roll thin soft material) into paper sheets is called a paper cutter. Among them, the cross-cutting device is one of the most critical parts of the machine, and its design structure and manufacturing quality are related to the performance and level of the whole machine. At present, there are two types of high-level machines popular in the market, the single-rotary knife paper cutter and the double-rotary knife paper cutter. The advantages of the double rotary knife paper cutter are that the cutting quality of the paper is excellent, the paper cutting accuracy is high, and the running speed is high. Its disadvantages are the high complexity, difficulty, and high cost of m...

AI Technical Summary

Problems solved by technology

Key problem: This structure can only guarantee the verticality of the knife edge when the linear velocity of the knife is strictly equal to the linear velocity of the paper

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