Coreless paper roll rewinder

Abstract

The invention relates to a coreless paper roll rewinder, which mainly comprises an upper rewinding roller, a lower rewinding roller and a compression roller, wherein a roller is arranged aside the upper rewinding roller; a roll-up belt capable of making synchronous motion with the upper rewinding roller is connected between the roller and the upper rewinding roller; a horn space of which the opening part is enlarged gradually is defined between the roll-up belt and the lower rewinding roller to be used as a roll-up area of a coreless paper roll; a vacuum cavity is formed by the roll-up belt, the upper rewinding roller and the roller; and vacuum air suction holes communicated with the vacuum cavity are distributed on the roll-up belt densely. In the coreless paper roll rewinder, the belt with the vacuum air suction holes is smartly used as a roll-up structure, and a gap between the roll-up belt and the lower rewinding roller is the horn space of which the opening part is enlarged gradually, so the paper roll is rolled uniformly, the buckling length of paper is reduced, and the quality of the paper roll is ensured; and a paper head is prevented from being rolled out under the support action of the belt on the paper head, so the production efficiency is improved, and coreless toilet paper rolls can be produced reliably at high speed.

Description

technical field [0001] The invention relates to a coreless toilet paper roll rewinding machine, which belongs to the technical field of paper processing machinery. Background technique [0002] Coreless rolls are characterized by the absence of a spool in the middle of the roll. Existing machines for rewinding such paper rolls generally need to complete the winding process with the help of a rolling aid. For example, the patent No. is 94101338.3, the patent titled "improved rewinding machine for coreless winding of strip reels with a surface that supports the reel during the winding process", the disclosed rewinding machine During the winding stage, the rewinding upper roller and the rewinding lower roller (referred to as "winding rollers 1, 3" in this patent) are temporarily brought together, and rely on a rolling aid (referred to as "supporting surface 21" in this patent) ” ) Shovel the head of the paper from the rewinding lower roller, so that the winding can be realize...

AI Technical Summary

Problems solved by technology

This kind of rewinding machine that relies on the roll-helping plate to start the roll has the following problems: 1. The roll gap between the rewinding upper roller and the rewinding lower roller must be changed during the process from starting to normal rewinding, causing the paper roll to be rewound during rewinding. 2. In the early stage of rewinding, the paper roll is supported by the helper plate, which may easily cause uneven force on the paper roll, resulting in serious unevenness in the winding tightness of the core of the paper roll. (commonly known as "flower core"), which seriously affects the subsequent processing of paper rolls and the quality of finished products; 3. The lower rewinding roller moves while rotating at high speed, and the moving distance of the lower rewinding roller must be precisely controlled, which will inevitably increase the complexity of the mechanism 4. The front end of the coiling aid needs to be comb-shaped, and the tooth ends of the comb are inserted into the ring grooves on the cylindrical surface of the lower rewinding roller, and the ring on the cylindrical surface of the lower rewinding roller The groove will produce obvious indentations on the surface of the paper roll, which seriously affects the appearance quality of the paper roll product

However, since this kind of rewinding machine needs to set a plurality of air passages consistent with the length of the rewinding roller in the rewinding roller with a length of 2 to 3.6 meters, it is necessary to use a deep hole drill or process the airflow passage of the mandrel first before proceeding. The way of the casing makes it difficult to process and expensive, and the toilet paper head part that is consistent with the length of the rewinding roller after the paper breaks cannot be rewound due to the lack of supporting force between the gaps of the two rewinding rollers that are running at high speed. Unwind evenly, prone to excessive wrinkle length at the initial part of the roll when the paper is picked up and rolled, affecting the quality of the paper roll

At the same time, when the machine is running at high speed, the paper head is easy to slip out from between the two high-speed rewinding rollers, which affects production efficiency

Images