CN218951846U

CN218951846U - Paper squeezes device

Info

Publication number: CN218951846U
Application number: CN202223265142.XU
Authority: CN
Inventors: 张成飞; 张益安; 梁永清; 刘永; 陈俊
Original assignee: Dongguan Nine Dragons Paper Co Ltd
Current assignee: Dongguan Nine Dragons Paper Co Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-02
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a paper press device, comprising: the paper after primary pressing sequentially passes through the second press roller group, the third press roller group and the drying cylinder to be pressed, and belt type paper guiding mechanisms are arranged between the second press roller group and the third press roller group and between the third press roller group and the drying cylinder; the three-press roller group comprises three upper rollers and three lower rollers which all adopt smooth rubber rollers. The three-press-roller set adopts the smooth rubber roller, and after the paper is pressed in the preamble, the smooth rubber roller of the three-press-roller set presses the paper, so that the smoothness of the paper surface can be further improved, the roughness is reduced, gaps among fibers in the paper and among fibers and fillers are reduced, and the printing performance of the paper is improved.

Description

Paper squeezes device

Technical field:

the utility model relates to the technical field of papermaking equipment, in particular to a paper pressing device.

The background technology is as follows:

along with the improvement of the living standard of people, the requirements on the living quality are higher and higher, the high-grade packaging paper not only requires exquisite appearance, but also requires printed patterns, round color and luster, vivid figures, the paper is formed by uniformly interweaving fibers, and the paper is porous and breathable, and only the smoothness of the paper surface is continuously improved, the smoothness of the paper surface is improved, the roughness is reduced, the gaps between the fibers or between the fibers and the filler can be reduced, and the ink absorption is more uniform and glossy. Therefore, the flatness technology of the high-grade packaging paper is researched, the surface performance of the paper is improved, the printing performance of the paper is improved, the customer complaint requirement is met, and the brand benefit of the company is improved.

The prior high-grade packaging paper flatness process mainly comprises the following steps: the top-grade packaging paper is usually formed by compounding three layers of online pulp into wet paper, wherein the paper is respectively surface pulp, core pulp and bottom pulp. Wherein the surface layer pulp consists of part of white wood pulp or deinked pulp, and the core layer consists of deinked pulp and DIP pulp; the bottom layer slurry used was a natural color OCC slurry. The simple process flow is as follows: surface layer sizing agent/core layer sizing agent/bottom layer sizing agent- & gt surface layer/core layer/bottom layer feeding system- & gt surface layer/core layer/bottom layer long net paper machine- & gt primary press- & gt secondary press- & gt tertiary press- & gt front drying cylinder drying system- & gt hard press calender- & gt sizing machine- & gt rear drying cylinder drying system- & gt soft press calender- & gt cold cylinder system- & gt coiling.

In the process, three times of pressing are adopted for the paper pressing device in front of the pre-dryer drying system, wherein in order to better reduce the moisture in the paper, felt is usually adopted on a press roller for the third time of pressing, the paper and the felt are pressed by the press roller together, and the paper after the third time of pressing enters the pre-dryer drying system for drying. One of the problems with this is: due to the existence of the felt, when the paper is subjected to the third pressing operation, the paper is easy to rewet, and the grains on the felt can be directly stamped on the surface of the paper, so that the surface of the paper subjected to the third pressing is still not smooth and uneven, and the quality problem of the finally produced paper is caused.

In addition, in the existing production process, the paper guiding device is absent in the paper pressing device, and paper can only be fed in a manual traction mode in the process of two-to-three-pressure paper and in the process of three-pressure paper to the front dryer drying system, so that the paper is still in a wet state at the moment, and the paper is easily broken or wrinkled due to manual paper guiding.

In order to solve the problems, the inventor improves the two-press and the three-press in the existing paper pressing device and proposes the following technical scheme.

The utility model comprises the following steps:

the utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a paper pressing device.

In order to solve the technical problems, the utility model adopts the following technical scheme: a paper press apparatus comprising: the paper after primary pressing sequentially passes through the second press roller group, the third press roller group and the drying cylinder to be pressed, and belt type paper guiding mechanisms are arranged between the second press roller group and the third press roller group and between the third press roller group and the drying cylinder; the three-press roller group comprises three upper rollers and three lower rollers which all adopt smooth rubber rollers.

In the above technical scheme, the paper suction device is further arranged at the outlet of the two press roller groups, and the paper end part output by the two press roller groups is conveyed to the paper guiding mechanism between the two press roller groups and the three press roller groups after being adsorbed by the paper suction device.

Furthermore, in the technical scheme, the paper machine further comprises a dry net conveying belt matched with the drying cylinder, and paper output by the three press roller groups passes through between the drying cylinder and the dry net conveying belt.

In the technical scheme, the paper guiding mechanism adopts a belt transmission structure, and the transmission belt adopts a porous and breathable composite material.

Furthermore, in the above technical scheme, the three pressing rollers are installed on the pressing roller seat, and the three pressing rollers are driven to lift by a hydraulic device arranged on the pressing roller seat.

Furthermore, in the above technical scheme, the two press roller sets are further provided with a felt transmission mechanism matched with the two press roller sets, and the felt in the felt transmission mechanism passes through between the two upper rollers and the two lower rollers in the two press roller sets.

Further, in the above technical solution, the felt transmission mechanism includes: the device comprises a felt, a felt transmission roller, a tensioning roller, an adjusting roller and a guide roller.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. the three-press-roller set adopts the smooth rubber roller, and after the paper is pressed in the preamble, the smooth rubber roller of the three-press-roller set presses the paper, so that the smoothness of the paper surface can be further improved, the roughness is reduced, gaps among fibers in the paper and among fibers and fillers are reduced, and the printing performance of the paper is improved.

2. The belt type paper guiding mechanism is arranged between the two press roller groups and the three press roller groups and between the three press roller groups and the drying cylinder, and the paper end can be quickly and stably conveyed to the next station through the paper guiding mechanism without damaging the paper.

3. According to the utility model, the felt transmission mechanism is arranged in the two press roller groups, and moisture in paper is discharged as much as possible through the felt, so that the moisture content of the paper entering the three press roller groups is further reduced, and the leveling operation of the paper in the three press roller groups is facilitated.

Description of the drawings:

fig. 1 is a schematic diagram of the structure of the present utility model.

The specific embodiment is as follows:

the utility model will be further described with reference to specific examples and figures.

The present utility model is a paper press apparatus, as shown in fig. 1, comprising: the device comprises a second press roller group 2, a third press roller group 3, a drying cylinder 4, a paper guiding mechanism 5, a paper sucking device 6, a dry net conveying belt 7 and a felt conveying mechanism 8. After the paper 1 subjected to the pre-treatment sequentially passes through the two press roller groups 2, the three press roller groups 3 and the drying cylinder 4, the whole pressing operation is finished, and the subsequent working procedure treatment is carried out

The two press roller groups 2 comprise: the sheet 1 passes between the two upper rollers 21 and the two lower rollers 22, and is pressed by the pressure generated between the two upper rollers 21 and the two lower rollers 22.

According to the water content of the paper, the paper 1 is pressed once after the paper making operation of the net machine, and then enters the two press roller groups, and the water content of the paper 1 is still high at the moment, so that a felt transmission mechanism 8 matched with the two press roller groups 2 is arranged at the two press roller groups 2 for further removing the water content of the paper 1.

The felt conveying mechanism 8 comprises: felt 80, felt transfer roller 81, tension roller 82, regulation roller 83, and guide roller 84. The felt 80 is wound around a felt conveying roller 81, a tension roller 82, an adjusting roller 83 and a guide roller 84 to form a endless conveying belt. Meanwhile, the felt 80 passes between the two upper rollers 21 and the two lower rollers 22. When the paper sheet 1 passes between the two upper rollers 21 and the two lower rollers 22, the paper sheet 1 and the felt 80 are pressed by both the two upper rollers 21 and the two lower rollers 22 at the same time. Since the felt 80 has a certain thickness and good water absorption effect, the felt can be pressed together with the paper 1, so that the paper 1 can be pressed more fully, the moisture in the paper 1 can be removed in an express way,

the conveying speed of the felt 80 in the felt conveying mechanism 8 is the same as that of the two pressing roller groups 2, and the felt 80 is driven by the conveying rollers 81. And the tension of the felt 80 is adjusted by the tension roller 82 and the adjusting roller 83. Due to the felt conveying mechanism 8, the two pressing rollers 21 and the two pressing rollers 22 in the two pressing roller groups 2 can directly adopt steel rollers.

After the paper 1 is pressed by the two press roller groups 2, the paper is output by the output end of the two press roller groups 2, a paper absorber 6 is further arranged at the outlet position of the two press roller groups 2, and the end part of the paper 1 output by the two press roller groups 2 is conveyed to a paper guiding mechanism 5 between the two press roller groups 2 and the three press roller groups 3 after being absorbed by the paper absorber 6.

The paper sucking device 6 adopts a vacuum/negative pressure adsorption device, the end part of the paper 1 output by the two compression roller groups 2 is adsorbed by utilizing the suction force generated by forming a vacuum adsorption surface on the lower surface of the paper sucking device 6, the paper sucking device 6 drives the end part of the paper 1 to move towards the paper guiding mechanism 5 positioned between the two compression roller groups 2 and the three compression roller groups 3 through a mechanical arm or a transmission mechanism, and finally the end part of the paper 1 is placed on the paper guiding mechanism 5.

The paper guiding mechanism 5 adopts a belt transmission structure, and mainly consists of a belt encircling two traction wheel rollers, wherein the traction wheel rollers can be driven to operate by a chain transmission mechanism driven by a motor, and the belt for transmission in the paper guiding mechanism 5 adopts a porous breathable composite material. An air extractor is arranged in the paper guiding mechanism 5, so that the surface of the belt forms negative pressure adsorption force, and the paper 1 can be adsorbed. After the end part of the paper 1 driven by the paper sucking device 6 runs above the paper guiding mechanism 5, the air suction in the paper sucking device 6 is stopped, when the adsorption force of the paper sucking device 6 is small, the end part of the paper 1 falls on the paper guiding mechanism 5 and is adsorbed by a transmission belt in the paper guiding mechanism 5. Finally, the sheet 1 is conveyed into the three-press roller group 3 with the operation of the sheet guiding mechanism 5.

The three-press roller group 3 comprises three upper rollers 31 and three lower rollers 32 which are all smooth rubber rollers. The smooth rubber roller is adopted, and the deformation of the rubber roller is larger than that of the steel roller, so that the paper 1 can be better pressed, the moisture is removed, and the felt folds generated in the two-pressing process of the paper can be eliminated, so that the paper is smoother and drier.

The three pressing rollers 32 are arranged on the pressing roller seat 30, and the three pressing rollers 32 are driven to lift by a hydraulic device arranged on the pressing roller seat 30. The three pressing rollers 32 are arranged in a lifting manner, so that the end part of the paper 1 can be easily fed into the three pressing roller group 3 through the paper guiding mechanism 5. After the end of the belt sheet 1 is fed into the three upper rollers 31 and the three lower rollers 32, the three lower rollers 32 are lifted by the hydraulic means on the press roller holder 30, pressing the sheet 1 between the three upper rollers 31 and the three lower rollers 32.

A belt type paper guiding mechanism 5 is also arranged between the three press roller groups 3 and the drying cylinder 4, and the paper guiding mechanism has the same structure as the paper guiding mechanism, and is also used for conveying the three press roller groups 3 at the end part of the paper 1 to the drying position 4 in the initial stage of starting to press the paper 1.

The paper guide mechanism 5 in the present utility model operates only in the initial stage of the start of pressing of the paper sheet 1 for conveying the end of the paper sheet 1 from the previous station to the next station. When the paper 1 starts to press, the transport of the paper 1 will be driven directly by the two press roll set 2 and the three press roll set 3. At this point the paper guiding mechanism 5 will no longer take part in the job. Therefore, in order to avoid the paper feeding mechanism 5 from interfering with the conveyance of the paper 1 when the paper 1 is normally subjected to the pressing operation. The paper guiding mechanism 5 can be arranged on a lifting table which can be lifted, and the paper guiding mechanism 5 can be lifted to a designated position through the lifting table in the initial stage of pressing the paper 1, so that the conveying of the end part of the paper 1 is completed. After completion, the lifting table descends, and the paper guiding mechanism 5 descends and is far away from the travelling path of the paper 1, so that interference to the paper 1 is avoided.

When the paper 1 enters the drying 4 to carry out the drying operation, in order to ensure that the paper 1 can smoothly travel, a dry mesh conveyor belt 7 is arranged at the drying cylinder 4, and the dry mesh conveyor belt 7 is an anilox fabric belt made of polyester fiber and other materials. The paper 1 output by the three press roll sets 3 passes between the drying cylinder 4 and the wire transfer belt 7. The paper 1 is pushed to travel by the relative rolling clamping between the dry wire conveyor belt 7 and the drying cylinder 4, so that the final drying operation is completed, and the subsequent process is carried out.

In addition, in order to prevent the adhesion of winding adhesive substances or broken paper scraps in the press roller, all press rollers in the second press roller group 2 and the third press roller group 3 can be provided with a scraper and a spray head, and the cleaning of the surfaces of the press rollers can be completed through the scraper and the spray head.

After the utility model is adopted, the front roughness of the paper can reach 4.5-6.5um, and the smoothness can reach 20.5-22.5s; the roughness of the back surface of the paper can reach 6.5-7.5um, and the smoothness can reach 9.5-10.0s. The roughness of the paper can be improved very significantly.

It is understood that the foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, but rather is to be accorded the full scope of all such modifications and equivalent structures, features and principles as set forth herein.

Claims

1. A paper press apparatus comprising: the paper (1) is pressed through the two press roller groups (2), the three press roller groups (3) and the drying cylinder (4) in sequence, and is characterized in that:

a belt type paper guiding mechanism (5) is arranged between the two pressing roller groups (2) and the three pressing roller groups (3) and between the three pressing roller groups (3) and the drying cylinder (4);

the three-press roller group (3) comprises three upper rollers (31) and three lower rollers (32) which are all smooth rubber rollers.

2. A paper press apparatus as claimed in claim 1, wherein: the paper feeding device is characterized in that a paper absorber (6) is further arranged at the outlet position of the two press roller groups (2), and after the paper (1) output by the two press roller groups (2) is absorbed by the paper absorber (6), the paper is conveyed to a paper guiding mechanism (5) between the two press roller groups (2) and the three press roller groups (3).

3. A paper press apparatus as claimed in claim 1, wherein: the paper machine also comprises a dry net conveying belt (7) matched with the drying cylinder (4), and the paper (1) output by the three press roller groups (3) passes through the space between the drying cylinder (4) and the dry net conveying belt (7).

4. A paper press apparatus as claimed in claim 1, wherein: the paper guiding mechanism (5) adopts a belt transmission structure, and the transmission belt adopts a porous and breathable composite material.

5. A paper press apparatus as claimed in claim 1, wherein: the three-pressing roller (32) is arranged on the pressing roller seat (30), and the three-pressing roller (32) is driven to lift by a hydraulic device arranged on the pressing roller seat (30).

6. A paper press apparatus as claimed in any one of claims 1 to 5, wherein: the two press roller sets (2) are also provided with a felt transmission mechanism (8) matched with the two press roller sets, and a felt (80) in the felt transmission mechanism (8) passes through the space between the two upper rollers (21) and the two lower rollers (22) in the two press roller sets (2).

7. A paper press apparatus as claimed in claim 6, wherein: the felt conveying mechanism (8) comprises: the device comprises a felt (80), a felt conveying roller (81), a tensioning roller (82), an adjusting roller (83) and a guiding roller (84).