Three-dimensional combined type multi-net paper machine

Abstract

The three-dimensional combined type multi-net paper machine comprises a fourdrinier net forming assembly, an upper rotary net forming assembly, a lower rotary net forming assembly and a squeezing and drying assembly which are sequentially arranged, the fourdrinier net forming assembly comprises a forming net, the upper rotary net forming assembly comprises a first blanket, and the lower rotary net forming assembly comprises a second blanket. The forming net is connected with the first blanket, the first blanket is connected with the second blanket, wet paper webs formed on the upper rotary net forming assembly and wet paper webs formed on the lower rotary net forming assembly are clamped between the wet paper webs formed on the fourdrinier net forming assembly, and paper is obtained after the wet paper webs are squeezed and dried through the squeezing and drying assembly. The upper surface and the lower surface of the obtained paper are respectively adhered to the surfaces of the first blanket and the second blanket, the paper surface is smooth, the difference between the two surfaces is small, the wet paper webs on the upper net cage and the lower net cage and the rough surfaces in contact with the net face the wet paper web on the forming net correspondingly, the rough surfaces are tightly combined after the wet paper webs are compacted by a press roll, and the three layers of paper webs do not need to be glued.

Description

Technical Field

[0001] The invention relates to the field of papermaking equipment, in particular to a three-dimensional composite multi-net papermaking machine. Background Art

[0002] Cylinder papermaking machine and Fourdrinier papermaking machine are commonly used papermaking equipment in the prior art.

[0003] When using a cylinder paper machine or a fourdrinier paper machine to produce paper, due to the separation of the pulp and the inflow of the fine fibers and fillers close to the mesh surface into the white water, the paper surface on the side attached to the mesh surface is relatively rough, and the side attached to the papermaking felt is relatively smooth, with a very obvious difference between the two sides. The difference in smoothness between the two sides of the paper is large, often exceeding the standard allowable range; in addition, when a traditional cylinder paper machine produces thicker paper, it is necessary to use a papermaking felt to pass through two or more parallel cylinder formers (such as Figure 3 As shown in the figure, two or more layers of wet paper are superimposed, and the layers are bonded under the pressure of the roller, and then the finished paper is obtained through subsequent pressing and drying processes. When the number of superimposed layers is large, the paper thickness cannot be accurately controlled and the paper uniformity is low.

[0004] The above are common problems existing in current papermaking equipment, which will cause the paper to fail to meet the use requirements in many cases. For example, for paper with dyeing requirements, large difference between the two sides and low uniformity will cause uneven dyeing and high dyeing costs. Summary of the invention

[0005] In order to make up for the above-mentioned shortcomings, the present invention provides a three-dimensional composite multi-net papermaking machine to reduce the difference in smoothness between the two sides of paper, improve the paper uniformity, and improve the paper quality.

[0006] The present invention is achieved through the following technical solutions:

[0007] A three-dimensional composite multi-net papermaking machine, characterized in that: the multi-net papermaking machine comprises a fourdrinier forming assembly, an upper cylinder forming assembly, a lower cylinder forming assembly and a pressing and drying assembly which are arranged in sequence, the upper cylinder forming assembly is located above the end of the fourdrinier forming assembly, the lower cylinder forming assembly is located below the end of the fourdrinier forming assembly, the fourdrinier forming assembly comprises a forming net, the upper cylinder forming assembly comprises a first felt, the lower cylinder forming assembly comprises a second felt, the forming net is connected with the first felt, and the first felt is connected with the second felt; the wet paper web formed on the upper cylinder forming assembly and the wet paper web formed on the lower cylinder forming assembly sandwich the wet paper web formed on the fourdrinier forming assembly in the middle, and the paper is obtained after being squeezed and dried by the pressing and drying assembly.

[0008] Further optimized, the fourdrinier forming assembly also includes a headbox, a breast roll, a table roll, a water suction box, a movable roll and a plurality of support rolls, the forming net is arranged on the breast roll, the table roll, the movable roll and a plurality of support rolls, the headbox is arranged at one end of the forming net, and the water suction box is arranged at the other end of the forming net.

[0009] In a further optimized manner, the forming net is a closed loop, and the water suction box is located at the bottom of the upper forming net.

[0010] Further optimized, the movable roller can be displaced up and down to disconnect from the first felt.

[0011] Further optimized, the upper cylinder screen forming assembly also includes a web groove, a web cage, a first v-roll, a second v-roll, a third v-roll and several supporting rollers, the first blanket is arranged on the first v-roll, the second v-roll, the third v-roll and several supporting rollers, the web cage is fixed in the web groove, and the web cage and the first blanket are connected with each other.

[0012] Further optimized, the first couch roller is located at the junction of the first felt and the upper net cage, the second couch roller is located at the junction of the first felt and the forming net, and the third couch roller is located at the junction of the first felt and the second felt.

[0013] Further optimized, the lower cylinder screen forming assembly also includes a lower screen trough, a lower screen cage, a fourth couch roll and a plurality of support rolls, the second blanket is arranged on the fourth couch roll and a plurality of support rolls, the lower screen cage is fixed in the lower screen trough, and the lower screen cage and the second blanket are connected with each other.

[0014] Further optimized, the fourth couch roller is located at the junction of the second felt and the net cage.

[0015] Further optimized, the pressing and drying assembly includes a fifth couch roller, a squeezing roller, a shaping roller, a drying roller and a paper winding roller which are arranged in sequence, and the fifth couch roller is connected to the second felt.

[0016] The beneficial effects of the present invention are:

[0017] The invention provides a three-dimensional composite multi-net papermaking machine. An upper cylinder net forming component, a fourdrinier net forming component and a lower cylinder net forming component adopt an upper-middle-lower design. A wet paper web is formed on the upper cylinder net and a wet paper web is formed on the lower cylinder net. The wet paper web formed on the fourdrinier net forming component is sandwiched in the middle. After being squeezed and dried by a pressing and drying component, paper is obtained. The upper and lower surfaces of the obtained paper are respectively the surfaces attached to a first felt and a second felt. The paper surface is smooth and has a small difference between the two surfaces. The corresponding wet paper webs on the upper cylinder cage and the lower cylinder cage have rough surfaces in contact with the nets facing the wet paper web on the forming net. After being compacted by a pressing roller, the rough surfaces are tightly combined, and no glue is required between the three layers of paper webs.

[0018] The present invention combines the advantages of a fourdrinier and a cylinder papermaking machine. The fourdrinier papermaking machine is convenient for accurately adjusting the thickness of paper, and the produced paper has uniform thickness, high strength, high paper quality, and is convenient for subsequent secondary processing procedures such as dyeing.

[0019] In the present invention, an adjustable movable roller is provided in the long net forming assembly, which can be displaced up and down to disconnect the connection with the first felt in the upper cylinder net forming assembly. For paper products with lower requirements on paper thickness and paper quality, the long net forming assembly can be disconnected, and the upper and lower cylinder net forming assemblies can be used separately, which is easy to use and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0021] Figure 2 The structure of the present invention is schematically shown Figure 2 .

[0022] Figure 3 It is a schematic diagram of the background technology of the present invention.

[0023] In the figure: 1. Fourdrinier forming assembly; 2. Upper cylinder forming assembly; 3. Lower cylinder forming assembly; 4. Pressing and drying assembly; 5. Cylinder former;

[0024] 11. Forming wire; 12. Headbox; 13. Breast roll; 14. Table roll; 15. Water suction box; 16. Support roll; 17. Moving roll;

[0025] 21. First felt; 22. Web trough; 23. Web cage; 24. First cassette roller; 25. Second cassette roller; 26. Third cassette roller;

[0026] 31. second felt; 32. lower net trough; 33. lower net cage; 34. fourth roller;

[0027] 41. Fifth roller; 42. Pressing roller; 43. Shaping roller; 44. Drying roller; 45. Paper reel roller. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1-Figure 3As shown, the present invention provides a three-dimensional composite multi-net papermaking machine, which comprises a fourdrinier forming assembly 1, an upper cylinder forming assembly 2, a lower cylinder forming assembly 3 and a pressing and drying assembly 4 which are arranged in sequence, wherein the upper cylinder forming assembly 2 is located above the end of the fourdrinier forming assembly 1, and the lower cylinder forming assembly 3 is located below the end of the fourdrinier forming assembly 1. The fourdrinier forming assembly 1 comprises a forming mesh 11, the upper cylinder forming assembly 2 comprises a first felt 21, the lower cylinder forming assembly 3 comprises a second felt 31, the forming mesh 11 is connected to the first felt 21, and the first felt 21 is connected to the second felt 31.

[0030] The wet paper web formed on the upper cylinder forming assembly 2 and the wet paper web formed on the lower cylinder forming assembly 3 sandwich the wet paper web formed on the fourdrinier forming assembly 1, and are squeezed and dried by the pressing and drying assembly to obtain paper. The upper and lower surfaces of the paper produced by the present invention are respectively the surfaces attached to the first felt and the second felt, and both surfaces are relatively smooth with a small difference between the two surfaces; the corresponding wet paper webs on the upper and lower cylinders, the rough surfaces in contact with the nets are all facing the wet paper webs on the forming net, and after being compacted by the pressing roller, the rough surfaces are tightly combined, and no glue is required between the three layers of paper webs.

[0031] As a preferred embodiment, the fourdrinier forming assembly further comprises a headbox 12, a breast roll 13, a table roll 14, a water suction box 15, a moving roll 17 and a plurality of support rolls 16. The forming net 11 is arranged on the breast roll 13, the table roll 14, the moving roll 17 and a plurality of support rolls 16 to form a closed loop, and the support rolls 16 support and tension the forming net 11. The headbox 12 is arranged at one end of the forming net 11 to evenly distribute the pulp on the forming net, and the water suction box 15 is arranged at the other end of the forming net, at the bottom of the upper forming net 11. The water suction box performs dehydration, which can improve the uniformity and smoothness of the paper and reduce the difference between the two sides of the paper.

[0032] As a preferred embodiment, the upper cylinder screen forming assembly 2 also includes an upper screen groove 22, an upper screen cage 23, a first courier roller 24, a second courier roller 25, a third courier roller 26 and a plurality of supporting rollers, the first blanket 21 is arranged on the first courier roller 24, the second courier roller 25, the third courier roller 26 and a plurality of supporting rollers, the upper screen cage 23 is fixed in the upper screen groove 22, and the upper screen cage 23 and the first blanket 21 are connected with each other.

[0033] The first couch roller 24 is located at the junction of the first felt 21 and the upper net cage 23, the second couch roller 25 is located at the junction of the first felt 21 and the forming wire 11, and the third couch roller 26 is located at the junction of the first felt 11 and the second felt 31. The first couch roller 24 is used to lift up the wet paper web on the upper net cage 23, the second couch roller 25 is used to lift up the wet paper web on the upper forming wire 11, and the third couch roller 26 is used to lift up the wet paper web on the second felt 31.

[0034] As a preferred embodiment, the lower cylinder screen forming assembly 3 further includes a lower screen slot 32, a lower screen cage 33, a fourth couch roll 34 and a plurality of support rolls, the second blanket 31 is arranged on the fourth couch roll 34 and a plurality of support rolls, the lower screen cage 33 is fixed in the lower screen slot 32, the lower screen cage 33 and the second blanket 31 are connected to each other, the fourth couch roll 34 is located at the junction of the second blanket 31 and the upper screen cage 33, and the fourth couch roll 34 is used to lift the wet paper web on the lower screen cage 33.

[0035] As a preferred embodiment, the pressing and drying assembly 4 includes a fifth couch roller 41, a squeezing roller 42, a shaping roller 43, a drying roller 44 and a paper winding roller 45 which are arranged in sequence. The fifth couch roller 41 is connected to the second felt 21 to lift up the three-layer paper web.

[0036] The paper produced by the present invention combines the advantages of the Fourdrinier and rotary screen papermaking machines. The Fourdrinier papermaking machine is convenient for accurately adjusting the thickness of the paper, and the produced paper has uniform thickness, high strength, and high paper quality, which is convenient for subsequent secondary processing procedures such as dyeing.

[0037] Embodiment 2:

[0038] As a preferred embodiment, the movable roller 17 can be displaced up and down, and can be controlled by a cylinder or the like to move the movable roller up and down, so as to disconnect the first felt 21. When producing paper products with lower requirements on paper thickness and paper quality, the long wire forming assembly can be disconnected, and the upper and lower round wire forming assemblies can be used separately, which is convenient to use and saves costs.

[0039] The parts not described in detail in the present invention are all known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A three-dimensional composite multi-wire papermaking machine, characterized in that: The multi-net papermaking machine comprises a fourdrinier forming assembly, an upper cylinder forming assembly, a lower cylinder forming assembly and a pressing and drying assembly which are arranged in sequence, wherein the upper cylinder forming assembly is located above the end of the fourdrinier forming assembly, and the lower cylinder forming assembly is located below the end of the fourdrinier forming assembly; The fourdrinier forming assembly comprises a forming net, the upper cylinder forming assembly comprises a first felt, the lower cylinder forming assembly comprises a second felt, the forming net is connected to the first felt, and the first felt is connected to the second felt; The wet paper web formed on the upper cylinder screen forming assembly and the wet paper web formed on the lower cylinder screen forming assembly sandwich the wet paper web formed on the fourdrinier screen forming assembly, and are squeezed and dried by the pressing and drying assembly to obtain paper.

2. The three-dimensional composite multi-wire papermaking machine according to claim 1, characterized in that: The fourdrinier forming assembly also includes a headbox, a breast roll, a table roll, a water suction box, a moving roll and a plurality of support rolls. The forming net is arranged on the breast roll, the table roll, the moving roll and a plurality of support rolls. The headbox is arranged at one end of the forming net, and the water suction box is arranged at the other end of the forming net.

3. The three-dimensional composite multi-wire papermaking machine according to claim 2, characterized in that: The forming net is in a closed loop, and the water suction box is located at the bottom of the upper forming net.

4. The three-dimensional composite multi-wire papermaking machine according to claim 2, characterized in that: The movable roller can be displaced up and down to disconnect from the first felt.

5. The three-dimensional composite multi-wire papermaking machine according to claim 1, characterized in that: The upper cylinder screen forming assembly also includes a web trough, a web cage, a first v-roll, a second v-roll, a third v-roll and a plurality of supporting rollers, the first blanket is arranged on the first v-roll, the second v-roll, the third v-roll and a plurality of supporting rollers, the web cage is fixed in the web trough, and the web cage and the first blanket are connected with each other.

6. The three-dimensional composite multi-wire papermaking machine according to claim 5, characterized in that: The first couch roller is located at the junction of the first felt and the upper net cage, the second couch roller is located at the junction of the first felt and the forming net, and the third couch roller is located at the junction of the first felt and the second felt.

7. The three-dimensional composite multi-wire papermaking machine according to claim 1, characterized in that: The lower cylinder screen forming assembly also includes a lower screen slot, a lower screen cage, a fourth couch roll and a plurality of support rolls, the second blanket is arranged on the fourth couch roll and a plurality of support rolls, the lower screen cage is fixed in the lower screen slot, and the lower screen cage and the second blanket are connected with each other.

8. The three-dimensional composite multi-wire papermaking machine according to claim 7, characterized in that: The fourth roller is located at the junction of the second felt and the net cage.

9. The three-dimensional composite multi-wire papermaking machine according to claim 1, characterized in that: The pressing and drying assembly comprises a fifth couch roller, a squeezing roller, a shaping roller, a drying roller and a paper winding roller which are arranged in sequence, and the fifth couch roller is connected with the second felt.

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