CN215705035U

CN215705035U - Roll paper flattening roll

Info

Publication number: CN215705035U
Application number: CN202121535651.2U
Authority: CN
Inventors: 刘胜贵; 王亚宁; 陈建德
Original assignee: Qujing Fupai Color Printing Co ltd
Current assignee: Qujing Fupai Color Printing Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-02-01
Anticipated expiration: 2031-07-07

Abstract

The roll paper flattening roller comprises a roller body, a roller shaft and a printing mechanism matched with the roller body, and is characterized in that the roller body is made into a cylindrical shape, an arc-shaped groove (11) with the depth of 0.5mm and the width of a groove opening of 1.5mm is engraved on the surface of the roller, and the arc-shaped groove structure on the flattening roller (10) is in an arc-shaped line shape which gradually expands from a middle position as a starting point to two end edges. The web flattening roller is manufactured, the web flattening roller is additionally arranged before the color groups are printed, and in operation, deformed and wrinkled paper is flattened by using the mode that the shape of the arc-shaped groove is dispersed from the middle to the two side edges of the flattening roller, so that the overprinting precision and the product quality of printed matters can be ensured, and the unit consumption of products is reduced.

Description

Roll paper flattening roll

Technical Field

The utility model relates to a web flattening roller for flattening a web of an intaglio printing press.

Background

The existing gravure printing machine produced by Xiaosenshang corporation can affect the overprinting precision and the product quality after the used roll paper deforms; the diameter of the web used by the gravure printing machine is generally 1400mm, the width of the paper is generally 400 mm-900 mm, and the fastest 20 days are from production, storage, transportation and to customers. The paper can contract and deform under the influence of temperature and humidity in different environments, the surface of the paper roll and the end face of the paper roll deform greatly, the end face can expand after moisture absorption, the paper is stressed unevenly during the production on a machine, the middle of the paper is tight generally, the edge of the paper is loose, a 'loose margin' is formed, some paper can wrinkle, the overprinting precision and the product quality are influenced, and the unit consumption of products is increased. If a paper flattening roller can be manufactured and installed on a color set of a printing machine, the deformed and wrinkled paper is flattened before the color set is printed, so that the overprinting precision and the product quality of a printed matter can be ensured, and the unit consumption of products is reduced.

Disclosure of Invention

The utility model aims to provide a roll paper flattening roller to solve the problem that the deformation of roll paper used by an intaglio printing machine produced by the Ministry of Senshang and Pont can affect the overprinting precision and the product quality of a product.

Through technical transformation, a roll paper flattening roller is additionally arranged in front of a printing color group of the gravure printing machine, and the deformed and wrinkled paper is flattened, so that the overprinting precision and the product quality of a printed matter can be ensured, and the unit consumption of products is reduced.

The technical scheme is as follows:

the roll paper flattening roll comprises a roll body, a roll shaft and a printing mechanism matched with the roll body, wherein the roll body is made into a cylindrical shape, the engraving depth on the roll surface is 0.5mm, the width of a notch is 1.5mm of an arc-shaped groove, and the arc-shaped groove structure on the flattening roll is in an arc-shaped line shape with a middle position as a starting point and gradually unfolded towards two end edges.

The roller body is made of aluminum materials, the two ends of the roller body are fixedly connected with roller shafts, and flattening roller bearings are installed at the shaft ends of the roller shafts. The flattening roller is arranged on a printing color group between the printing plate roller and the paper feeding roller.

The web flattening roller is manufactured according to the mode, the web flattening roller is additionally arranged before the color groups are printed, and in operation, the deformed and wrinkled paper is flattened by utilizing the mode that the shape of the arc-shaped groove is dispersed from the middle to the two side edges of the flattening roller, so that the overprinting precision and the product quality of printed matters can be ensured, and the unit consumption of products is reduced.

Drawings

FIG. 1 is a schematic view of a web nip roll configuration and installation on a printing press.

Detailed Description

The technical solution is further explained below as an embodiment with reference to the accompanying drawings.

Referring to fig. 1, according to the width and the spatial position of a printing machine, an aluminum material is selected to manufacture a flattening roller 10 which is a cylindrical roller body, and an arc-shaped groove 11 with the depth of 0.5mm and the surface width of 1.5mm is engraved on the roller surface of the roller body; the arc-shaped groove on the flattening roller 10 is in an arc-shaped line structure which gradually expands from the middle position as a starting point to two end edges, so that the flattening effect is realized, and the paper is prevented from wrinkling. If the arc lines of the arc-shaped grooves are in the same direction, the flattening effect is poor, and a part of the paper surface is wrinkled, so that the purpose of flattening the paper is difficult to achieve.

The center positions of two end surfaces of the roller body are respectively fixedly connected with a flattening roller shaft 9, and the end part of the flattening roller shaft 9 is provided with an upper flattening roller bearing 8; the nip roll is completed. After the paper is manufactured, the paper is installed on a printing color group, and the paper enters the color group for printing after being flattened by the flattening roller, so that the overprinting precision and the product quality of a printed product can be ensured, and the unit consumption of the product is reduced. Note that the nip roll direction cannot be installed reversely, that is, according to the paper feeding direction, when the nip roll rotates to the paper feeding direction, the direction of the arc-shaped groove is toward both ends of the nip roll when viewed from the middle toward both sides, which is the positive direction. When the flattening roller rotates towards the paper feeding direction, the arc-shaped groove moves inwards from the edge when viewed from the edge, the direction is opposite to the direction, and when the flattening roller runs in the opposite direction, the paper is wrinkled, so that the flattening purpose cannot be achieved.

Referring to fig. 1, the roll paper flattening roll is installed on an intaglio printing press, and is used for flattening paper to be printed so as to improve the quality of printed products of the intaglio printing press. Nip roll 10 is mounted between feed roll 15 and form roll 6 on the print couple by a nip roll shaft 9 and nip roll bearing 8. Thus, the nip roll 10 has its rear side adjacent to the feed roll 15 and its front side adjacent to the printing plate roll 6.

The feed roller 15 has a feed roller shaft 14 and a feed roller bearing 13 at both ends thereof, and is rotatably fixed to a support body at a corresponding position on the gravure printing machine.

The printing plate roller 6 and the rubber roller 1 are printing members of a gravure press, and the printing plate roller 6 is positioned below the rubber roller 1, and the roller surfaces of the two are rotated and contacted, so that the pattern 7 on the printing plate roller 6 is imprinted on the paper surface passing through the two-roller contact portion by the rubber roller 1. The two ends of the printing plate roller 6 are provided with a printing plate roller shaft 4 and a printing plate roller bearing 5; the two ends of the rubber roller 1 are provided with a rubber roller shaft 2 and a rubber roller bearing 3. They are also mounted and fixed in a rotating manner on a corresponding support on the intaglio printing machine.

The method of use is described below:

according to fig. 1, the nip roll 10 is mounted on the printing couple of the intaglio printing press in a position which is interposed between the feed roll and the printing plate roll, taking care that the orientation is not reversed, otherwise the sheet will wrinkle. The paper forms an arc form after the tensioning under the effect of tension, along with the rotation of nip roll, the paper is toward both sides exhibition flat under the effect of arc wall 11 on nip roll, can not play the fold, guarantees the quality of printed matter. The paper flattening roll is thus installed.

The paper flattening roller made in this way solves the problem that the paper roll of the gravure printing machine is deformed and wrinkled under the influence of temperature and humidity to influence the overprinting precision and the product quality.

Claims

1. The roll paper flattening roller comprises a roller body, a roller shaft and a printing mechanism matched with the roller body, and is characterized in that the roller body is made into a cylindrical shape, an arc-shaped groove (11) with the depth of 0.5mm and the width of a groove opening of 1.5mm is engraved on the surface of the roller, and the arc-shaped groove structure on the flattening roller (10) is in an arc-shaped line shape which gradually expands from a middle position as a starting point to two end edges.

2. Roll nip according to claim 1, characterised in that the roll body is made of aluminium, that the roll body is provided with a roll shaft (9) at both ends, and that the roll shaft (9) is provided with a nip bearing (8) at the end of the roll shaft.

3. Web spreader roll according to claim 1, characterised in that the spreader roll (10) is mounted in a printing couple between a printing plate roll (6) and a feed roll (15).