Reliable and tidy rewinder for web breaks

Abstract

The invention relates to a re-reeling machine capable of reliably and tidily cutting paper. The re-reeling machine comprises an upper re-reeling roller, a bottom re-reeling roller and a paper-pressing roller, which all rotate by clamping a paper scroll, wherein a cylindrical surface of the upper re-reeling roller and a fixed curved surface are close to each other, so as to form a core tube channel, and the cylindrical surface of the upper re-reeling roller is provided with a plurality of circles of smooth surfaces which are slightly protruded from a friction surface of a roller body. The re-reeling machine capable of reliably and tidily cutting paper has the advantages that a core tube cannot be immediately driven to roll by the upper re-reeling roller when the upper re-reeling roller is just pressed by the core tube, so that the paper sheet at the tail of the paper scroll can be reliably broken, the uneven stress on the paper sheet at the tail of the paper scroll caused by the rolling of the core tube is avoided, the fractures of the paper sheet are tidily, and furthermore, when the upper re-reeling roller, the bottom re-reeling roller and the paper-pressing roller all rotate by clamping the paper scroll, the friction surface of the upper re-reeling roller still can be in sufficient contact with the surface of the paper scroll and is not influenced by the smooth surfaces, so that the upper re-reeling roller can reliably rotate at high speed by clamping the paper scroll together with the bottom re-reeling roller and the paper-pressing roller.

Description

technical field [0001] The present invention relates to a rewinding machine for producing paper rolls with a core tube, in particular to the mechanism for breaking and rewinding in such a rewinding machine. Background technique [0002] A rewinder for producing paper rolls with a core tube, such as a rewinder for producing toilet paper rolls with a core tube, uses a paper breaking and winding mechanism such as figure 1 As shown, it includes a rewinding upper roller 1, a rewinding bottom roller 2 and a paper pressing roller 3, the three of which jointly rotate with a paper roll 4, and the cylindrical surface of the rewinding upper roller 1 and a fixed curved surface 5 are close to each other to form a Core tube channel 6. The basic working principle of this mechanism to realize paper breaking and rolling is: after the diameter of the current rewinding paper roll 4 meets the requirements, the core tube 7 of the new paper roll is sent into the core tube channel 6, when the cor...

AI Technical Summary

Problems solved by technology

[0003] It can be seen from the above working principle that the core tube needs to tightly press the paper wound on the rewinding upper roll 1 to achieve paper breakage. However, when the core tube 7 is pressed against the rewinding upper roll 1 by the curved surface 5, the core tube 7 It is easy to roll along the curved surface 5 under the drive of the rewinding upper roller 1, so that the paper at the end of the paper roll 4 cannot be tightened, or the tension is insufficient, resulting in a failure to break the paper; 5. During the rolling process, it is difficult to ensure that the axis of the core tube 7 is parallel to the axis of the rewinding upper roller 1, and the core tube 7 may be skewed, which may easily cause uneven stress on the tight paper, resulting in uneven fracture of the paper uneven

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