Auxiliary system for improving calendaring effect of paper sheet banner and paper machine

Abstract

The utility model relates to an auxiliary system for improving the calendaring effect of a paper sheet banner and a paper machine, the auxiliary system comprises a calendaring assembly, a jet assembly and a control box, the calendaring assembly comprises a heating roller and a pressurizing roller, the heating roller is arranged at the top of the pressurizing roller, and paper is placed between the heating roller and the pressurizing roller; the spraying assembly comprises a compressed air tank and a main air pipe, the main air pipe is arranged at the top of the heating roller, and the axial direction of the main air pipe is parallel to the axial direction of the heating roller; one end of the main air pipe is communicated with the compressed air tank, a plurality of branch air pipes are arranged on the main air pipe at equal intervals in the axis direction, air outlets of the branch air pipes directly face the surface of the heating roller, and a pneumatic control valve is arranged on a pipeline of each branch air pipe; and the control box is electrically connected with the plurality of pneumatic control valves respectively. According to the utility model, air is blown to the heating roller in the concave-convex mark area through the branch air pipe, the surface of the heating roller in the corresponding area causes local tiny deformation, and the concave-convex marks on a paper sheet are calendered and trimmed through the deformation, so that the concave-convex marks disappear, and the quality of finished paper is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pulping and papermaking technical field, especially a kind of auxiliary system and paper machine for improving the calendering effect of paper page width. BACKGROUND

[0002] Kraft paper is a kind of high-strength paper, usually used to make packaging materials such as cartons, boxes, etc. In the production process, the paper pulp after batching is transported to the paper machine, and the paper pulp is evenly distributed on the paper web belt through the headbox. With the movement of the web belt, water is filtered out of the paper pulp, and the paper pulp fibers gradually interweave together to form a wet paper sheet. The wet paper sheet is subjected to processes such as pressing and drying to remove the water therein, and finally forms kraft paper.

[0003] In order to improve the surface flatness and gloss of kraft paper, the dried paper needs to be calendered. The paper surface is made smoother through the squeezing and rubbing of the press roller of the calender, improving the printing suitability of the paper.

[0004] In the prior art, during the production process of kraft paper, due to the uneven surface sizing of the base paper or the large deviation of the moisture content of the base paper width, etc., after the paper sheet is calendered by the calender, it usually appears concave-convex marks and ridge, which seriously affects the quality of the finished paper. UTILITY MODEL CONTENTS

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the concave-convex marks and ridge on the surface of kraft paper after calendering in the prior art, which affects the production quality of the finished paper.

[0006] To solve the above technical problems, the utility model provides an auxiliary system for improving the calendering effect of paper page width, comprising:

[0007] A calendering assembly, the calendering assembly comprises a heating roller and a press roller, the axial direction of the heating roller is parallel to the axial direction of the press roller, the heating roller is arranged on the top of the press roller, and the paper is placed between the heating roller and the press roller;

[0008] A spraying assembly, the spraying assembly comprises a compressed gas tank and a main gas pipe, the main gas pipe is arranged on the top of the heating roller, and the axial direction of the main gas pipe is parallel to the axial direction of the heating roller; one end of the main gas pipe is in communication with the compressed gas tank, a plurality of branch gas pipes are arranged equidistantly along the axial direction of the main gas pipe, the gas outlet of the branch gas pipe is arranged opposite to the surface of the heating roller, and a pneumatic regulating valve is arranged on the pipeline of each branch gas pipe;

[0009] A control box, the control box is electrically connected with a plurality of pneumatic regulating valves.

[0010] In one embodiment of the present invention, the injection assembly further includes an air filter disposed between the compressed air tank and the main air pipe.

[0011] In one embodiment of this utility model, a plug is provided at the end of the main air pipe away from the compressed air tank.

[0012] In one embodiment of this utility model, a pressure gauge is provided on the compressed air tank, and the pressure of the compressed air tank is 0.3-0.5 MPa.

[0013] In one embodiment of this utility model, the length of the main air pipe is greater than the length of the heating roller, and multiple branch air pipes are evenly distributed along the axial direction of the heating roller.

[0014] In one embodiment of the present invention, the calendering assembly further includes a support frame, and the heating roller and the pressure roller are disposed between the support frame.

[0015] In one embodiment of the present invention, the calendering assembly further includes a scanner, which is disposed at the input end of the heating roller and the pressure roller, and the detection end of the scanner is positioned facing the paper.

[0016] In one embodiment of this utility model, the scanner is provided with multiple recognition modules, which are equidistantly arranged along the width of the paper, and all of the multiple recognition modules are electrically connected to the control box.

[0017] In one embodiment of this utility model, the number of the identification modules is equal to the number of the pneumatic regulating valves.

[0018] A paper machine includes the aforementioned auxiliary system for improving the calendering effect of the paper width.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] This invention relates to an auxiliary system and papermaking machine for improving the calendering effect of paper width. The system utilizes multiple air branches installed at the top of the heated rollers to blow air onto the heated rollers in areas with unevenness or dents. This causes minute deformations on the surface of the heated rollers in these areas, effectively calendering and smoothing out the unevenness or dents on the paper, thus eliminating them. This solves the problem of unevenness or dents on paper and improves the quality of the finished paper. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1This is a front view of the overall structure of this utility model;

[0023] Figure 2 This is a side view of the overall structure of this utility model;

[0024] Figure 3 for Figure 1 Schematic diagram of a medium-voltage optical component;

[0025] Figure 4 for Figure 1 Schematic diagram of the middle injection assembly;

[0026] Explanation of reference numerals in the instruction manual: 1. Calendering assembly; 2. Spraying assembly; 3. Control box; 11. Heating roller; 12. Pressure roller; 13. Paper; 14. Support frame; 15. Scanner; 16. Recognition module; 21. Compressed air tank; 22. Main air pipe; 23. Branch air pipe; 24. Pneumatic regulating valve; 25. Plug; 26. Air filter; 27. Pressure gauge. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1

[0028] Reference Figures 1-4 As shown, this utility model discloses an auxiliary system for improving the calendering effect of paper horizontal width, comprising:

[0029] Calendering assembly 1, the calendering assembly 1 includes a heating roller 11 and a pressure roller 12, the axial direction of the heating roller 11 is parallel to the axial direction of the pressure roller 12, the heating roller 11 is disposed on top of the pressure roller 12, and paper 13 is placed between the heating roller 11 and the pressure roller 12;

[0030] The injection assembly 2 includes a compressed air tank 21 and a main air pipe 22. The main air pipe 22 is disposed on the top of the heating roller 11, and the axial direction of the main air pipe 22 is parallel to the axial direction of the heating roller 11. One end of the main air pipe 22 is connected to the compressed air tank 21. Multiple branch air pipes 23 are equidistantly arranged along the axial direction of the main air pipe 22. The air outlet of each branch air pipe 23 is disposed facing the surface of the heating roller 11. A pneumatic regulating valve 24 is provided on each branch air pipe 23.

[0031] The control box 3 is electrically connected to a plurality of the pneumatic regulating valves 24.

[0032] The heating roller 11 and pressure roller 12 in the calendering assembly 1 are used to pass paper 13 through. The pressure roller 12 is located at the bottom of the heating roller 11 and presses the paper 13 onto the heating roller 11. By applying uniform and appropriate pressure to the paper 13, the fibers on the surface of the paper 13 are compressed, the unevenness on the surface of the paper 13 is flattened, and the tiny pores and bumps on the surface of the paper 13 are filled, thereby improving the flatness and smoothness of the paper 13 and improving the appearance quality of the paper 13. The heating roller 11 is equipped with a heating source. After the paper 13 passes through the heating roller 11, the performance of the paper 13 can be improved, the calendering effect can be improved, and the production efficiency and quality can be improved.

[0033] In the injection assembly 2, the compressed air tank 21 provides compressed cold air, which inflates the main air pipe 22. Multiple branch pipes 23 are arranged axially along the main air pipe 22, with their outlets facing the heating roller 11. These branch pipes 23 divide the heating roller 11 into multiple equidistant areas. Each branch pipe 23 is controlled by a corresponding pneumatic regulating valve 24 to control whether air is supplied to it. As a preferred embodiment of this invention, the pneumatic regulating valve 24 is an electrically controlled valve, controlled by the control box 3.

[0034] In actual operation, when uneven marks appear on the surface of paper 13, it proves that the basis weight moisture deviation of paper 13 in that area is large. Open the pneumatic regulating valve 24 in the corresponding area and control the air pipe 23 to blow air onto the heating roller 11. Compressed cold air is continuously blown onto the surface of the heating roller 11. Utilizing the principle of thermal expansion and contraction, the area of ​​the heating roller 11 that is blown by cold air will shrink and become smaller, reducing the pressure on the paper 13. The area with large basis weight moisture deviation is squeezed less, thereby avoiding the appearance of uneven marks and improving the quality of the finished paper.

[0035] This invention utilizes multiple air pipes 23 installed on the top of the heating roller 11 to blow air onto the heating roller 11 in areas with uneven marks. This causes minute deformation on the surface of the heating roller 11 in the corresponding areas, which can calender and smooth the uneven marks on the paper, making them disappear. This solves the problem of uneven marks on paper and improves the quality of the finished paper.

[0036] Furthermore, the injection assembly 2 also includes an air filter 26, which is disposed between the compressed air tank 21 and the main air pipe 22.

[0037] Specifically, the air filter 26 can filter the compressed air to prevent impurities in the air (dust, moisture and oil, etc.) from being blown onto the surface of the heating roller 11 and affecting the quality of the paper 13.

[0038] Furthermore, a plug 25 is provided at the end of the main air pipe 22 away from the compressed air tank 21.

[0039] Specifically, compressed air enters from one end of the main air pipe 22 and exits from the branch pipe 23. In the actual assembly process, one end of the main air pipe 22 is first blocked with a plug 25, and the other end is connected to the compressed air tank 21. The installation of the branch pipe 23 requires first drilling a hole in the surface of the main air pipe 22, and then fixing the branch pipe 23 to the hole. As a preferred embodiment of this invention, both the main air pipe 22 and the branch pipe 23 are made of stainless steel. To ensure the range of air blowing, the diameter of the branch pipe 23 is DN15 (nominal diameter 15 mm).

[0040] Furthermore, a pressure gauge 27 is installed on the compressed air tank 21. During actual operation, a certain air pressure needs to be maintained to quickly cool the surface of the heating roller 11. As a preferred embodiment of this utility model, the pressure of the compressed air tank 21 is 0.3-0.5 MPa.

[0041] Furthermore, the length of the main air pipe 22 is greater than the length of the heating roller 11, and multiple branch air pipes 23 are evenly distributed along the axial direction of the heating roller 11. This ensures that the blowing area of ​​the multiple branch air pipes 23 can cover the entire heating roller 11.

[0042] Furthermore, the calendering assembly 1 also includes a support frame 14 for supporting and mounting the heating roller 11 and the pressure roller 12, which are disposed between the support frame 14.

[0043] Furthermore, the calendering assembly 1 also includes a scanner 15, which is disposed at the input end of the heating roller 11 and the pressure roller 12, and the detection end of the scanner 15 is disposed facing the paper 13.

[0044] Specifically, the scanner 15 can scan the paper 13 in advance to detect the quantitative moisture content of the paper 13 across its width. As a preferred embodiment of this invention, the scanner 15 is internally equipped with multiple identification modules 16, which are equidistantly arranged along the width of the paper 13 and electrically connected to the control box 3. Each module identifies different areas of the paper 13 and feeds back the identification signals to the control box 3. When the identification module 16 in a corresponding area detects a large deviation in the quantitative moisture content of the bottom of the paper 13, the control box 3 opens the pneumatic regulating valve 24 in that area to pre-blow air onto the heating roller 11, preventing the formation of dents and further improving the surface quality of the paper 13. Furthermore, if the quantitative moisture content in that area meets production requirements, a signal is fed back to the control box 3 to close the pneumatic regulating valve 24 in the corresponding area.

[0045] Furthermore, the number of identification modules 16 is equal to the number of pneumatic regulating valves 24. Each pneumatic regulating valve 24 corresponds to one identification module 16. Example 2

[0046] A paper machine includes an auxiliary system for improving the calendering effect of the paper width as described in Embodiment 1.

[0047] In summary, this invention introduces an auxiliary system and papermaking machine for improving the calendering effect of paper width. By installing multiple branch pipes 23 on the top of the heating roller 11, air is blown onto the heating roller 11 in areas with unevenness or dents. This causes slight deformation on the surface of the heating roller 11 in the corresponding areas, which calenders and smooths out the unevenness or dents on the paper, making them disappear. This solves the problem of unevenness or dents on the paper and improves the quality of the finished paper. Secondly, a scanner 15 scans the surface of the paper 13 in advance. When areas with large moisture content deviations in the width of the paper 13 are found, the pneumatic regulating valve 24 in the corresponding area is opened in advance to blow air onto the heating roller 11, preventing the formation of unevenness or dents and further improving the surface quality of the paper 13.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An auxiliary system for improving the calendering effect of paper width, characterized in that, include: A calendering assembly, comprising a heating roller and a pressure roller, wherein the axial direction of the heating roller is parallel to the axial direction of the pressure roller, the heating roller is disposed on top of the pressure roller, and paper is placed between the heating roller and the pressure roller; The injection assembly includes a compressed air tank and a main air pipe. The main air pipe is located on top of the heating roller, and its axial direction is parallel to that of the heating roller. One end of the main air pipe is connected to the compressed air tank. Multiple branch air pipes are equidistantly arranged along the axial direction of the main air pipe. The air outlet of each branch air pipe is positioned facing the surface of the heating roller. Each branch air pipe is equipped with a pneumatic regulating valve. The control box is electrically connected to each of the pneumatic regulating valves.

2. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: The injection assembly also includes an air filter disposed between the compressed air tank and the main air pipe.

3. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: A plug is provided at the end of the main air pipe away from the compressed air tank.

4. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: The compressed air tank is equipped with a pressure gauge, and the working pressure of the compressed air tank is 0.3-0.5 MPa.

5. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: The length of the main air pipe is greater than the length of the heating roller, and multiple branch air pipes are evenly distributed along the axial direction of the heating roller.

6. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: The calendering assembly also includes a support frame, with the heating roller and the pressure roller disposed between the support frame.

7. The auxiliary system for improving the calendering effect of paper width according to claim 1, characterized in that: The calendering assembly also includes a scanner, which is disposed at the input end of the heating roller and the pressure roller, with the detection end of the scanner facing the paper.

8. The auxiliary system for improving the calendering effect of paper width according to claim 7, characterized in that: The scanner is equipped with multiple recognition modules, which are equidistant from each other along the width of the paper, and all of the recognition modules are electrically connected to the control box.

9. The auxiliary system for improving the calendering effect of paper width according to claim 8, characterized in that: The number of the identification modules is equal to the number of the pneumatic regulating valves.

10. A papermaking machine, characterized in that, Includes an auxiliary system for improving the calendering effect of the horizontal width of a paper as described in any one of claims 1-9.

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