A slitting and rewinding machine and paper core structure

Abstract

This utility model discloses a slitting and rewinding machine and a paper core structure, belonging to the field of papermaking equipment. A slitting and rewinding machine includes multiple winding stations, each winding station equipped with a first slitting knife assembly, a second slitting knife assembly, two winding arms, and a paper core disposed between the two winding arms. The paper core comprises a first paper core and a second paper core coaxially arranged, both being tubular paper cores. The first and second paper cores are connected as a single unit by an air-expanding shaft disposed within their tubular cavities, and an annular gasket is coaxially arranged between the first and second paper cores to separate them. A third slitting knife assembly is also disposed between the first and second slitting knife assemblies at the interval corresponding to the first and second paper cores in each winding station. This utility model has a simple structure and can rewind smaller paper rolls based on existing slitting and rewinding machines.

Description

Technical Field

[0001] This utility model relates to a slitting and rewinding machine, and more particularly to an improvement of the slitting and rewinding mechanism of the slitting and rewinding machine, used for longitudinally slitting wide-width paper and rewinding it into small paper rolls as required by the customer, belonging to the field of papermaking equipment. This utility model also relates to the paper core structure used in the above-mentioned slitting and rewinding machine. Background Technology

[0002] In the paper production process, the paper produced by the paper machine is wound into a master roll by the winding machine. The master roll is usually quite wide, around 10 meters in width, so the paper needs to be cut into the width required by the customer.

[0003] A slitting and rewinding machine is a device that longitudinally slits wide-width paper and rewinds it into small paper rolls as required by the customer. (See attached image) Figure 1 The image shows a conventional slitting and rewinding machine. Such machines typically have multiple winding stations, each equipped with two slitting blade assemblies, two winding arms, and a paper core positioned between the two winding arms. The slitting blade assemblies longitudinally slit the paper to the width required by the customer. The two winding arms support and rotate the paper core, continuously winding the slit paper onto it. Due to space limitations, the minimum width of the paper roll that each slitting and rewinding machine can slit and rewind is restricted. For example, the JR1000E slitting and rewinding machine, with nine winding stations, can only rewind paper rolls with a minimum width of 400mm. Smaller roll widths cannot be produced. Sometimes, the required roll width is smaller than the minimum width the machine can rewind. To meet customer needs, paper manufacturers often need to invest in new slitting and rewinding machines, resulting in significant investment. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, this utility model provides a slitting and rewinding machine capable of rewinding smaller paper rolls.

[0005] This utility model is achieved through the following technical solution: a slitting and rewinding machine, comprising multiple paper winding stations, each paper winding station being equipped with a first slitting knife assembly, a second slitting knife assembly, two winding arms, and a paper core disposed between the two winding arms, characterized in that: the paper core comprises a first paper core and a second paper core arranged coaxially, both the first paper core and the second paper core being tubular paper cores, the first paper core and the second paper core being connected as one unit by an air expansion shaft disposed within their tubular cavity, and an annular gasket being coaxially disposed between the first paper core and the second paper core to separate the first paper core and the second paper core; a third slitting knife assembly is also disposed between the first slitting knife assembly and the second slitting knife assembly of each paper winding station at the interval corresponding to the first paper core and the second paper core.

[0006] In this invention, a third slitting knife assembly is installed between the first and second slitting knife assemblies in the paper winding station. This third slitting knife assembly cuts the paper material between the first and second slitting knife assemblies. The two sheets of paper cut by the three slitting knife assemblies are then wound onto the first and second paper cores respectively by the winding arms, forming two paper rollers between the two winding arms. After winding is complete, the two paper rollers and the paper core are unloaded from the winding arms. Because the first and second paper cores are connected as a single unit by an air shaft, they can be separated after the air shaft is deflated, allowing the two paper rollers to become independent. An annular gasket positioned between the first and second paper cores separates them, preventing the paper rollers from sticking together during the winding process.

[0007] Furthermore, to prevent the paper cores from merging, the ends of the first and second paper cores near the annular gasket are designed as bevels or arc surfaces.

[0008] Furthermore, to prevent the paper rollers from sticking together during the paper winding process, the outer diameter of the end of the first paper core and the second paper core furthest from the annular gasket is 0.1-0.3 mm larger than the outer diameter of the end closest to the annular gasket.

[0009] Furthermore, to prevent the paper rollers from sticking together during the paper rolling process, the annular gasket is a steel gasket with a thickness of 4-8 mm.

[0010] Furthermore, to facilitate the adjustment of the position of the third slitting blade assembly and to facilitate the production of paper rollers of different specifications, the position of the third slitting blade assembly is adjustable.

[0011] This utility model also provides a paper core structure for a slitting and rewinding machine, which includes a first paper core and a second paper core arranged coaxially. Both the first paper core and the second paper core are tubular paper cores. The first paper core and the second paper core are connected as one unit by an air expansion shaft arranged in their tubes. An annular gasket is coaxially arranged between the first paper core and the second paper core to separate the first paper core and the second paper core.

[0012] Furthermore, the ends of the first and second paper cores near the annular gasket are set as bevels or arc surfaces.

[0013] Furthermore, the outer diameter of the end of the first paper core and the second paper core furthest from the annular gasket is 0.1-0.3 mm larger than the outer diameter of the end closest to the annular gasket.

[0014] Furthermore, the annular gasket is a steel gasket with a thickness of 4-8 mm.

[0015] Furthermore, the thickness of the annular gasket is 6 mm.

[0016] The beneficial effects of this utility model are as follows: This utility model has a simple structure. By adding a second set of cutting blades between the two sets of cutting blades in the winding station of an existing slitting and rewinding machine, and designing the paper core between the two winding arms as a structure of two paper cores connected by an air shaft, it achieves the goal of rewinding smaller width paper rolls on an existing slitting and rewinding machine. This allows the existing slitting and rewinding machine to more flexibly rewind paper rolls of various specifications, meeting customer needs. This utility model can be modified on existing slitting and rewinding machines with minimal investment and low modification costs, resulting in significant economic benefits. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a slitting and rewinding machine in the prior art;

[0018] Figure 2 This is a schematic diagram of the slitting and rewinding machine in this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the paper core in this utility model;

[0020] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0021] Figure 5 This is a cross-sectional schematic diagram of a paper core with thickened layers at both ends in this utility model;

[0022] In the diagram, 1 is the frame, 2 is the first slitting knife assembly, 3 is the third slitting knife assembly, 4 is the second slitting knife assembly, 5 is the upper knife assembly guide rail, 6 is the lower knife assembly guide rail, 7 is the take-up arm guide rail, 8 is the first take-up arm, 9 is the second take-up arm, and 10 is the paper core.

[0023] 2.1 Upper blade assembly; 2.2 Lower blade assembly;

[0024] 10.1 First paper core, 10.2 Second paper core, 10.3 Annular gasket, 10.4 Air shaft, 10.5 Thickening layer. Detailed Implementation

[0025] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0026] As attached Figures 2-4 As shown, this utility model improves the slitting and rewinding mechanism of an existing slitting and rewinding machine. The slitting and rewinding machine includes multiple paper winding stations, and is equipped with... Figure 2Only one paper roll station is shown in the diagram. The original configuration of each paper roll station is as follows: it is equipped with a first slitting knife assembly 2, a second slitting knife assembly 4, a first winding arm 8, a second winding arm 9, and a paper core 10 disposed between the two winding arms. The first slitting knife assembly 2 and the second slitting knife assembly 4 have the same structure and are disposed in the same way. Taking the first slitting knife assembly as an example, it includes an upper knife assembly 2.1 and a lower knife assembly 2.2. The upper knife assembly 2.1 is disposed on the upper knife assembly guide rail 5, and the lower knife assembly 2.2 is disposed on the lower knife assembly guide rail 6. The upper knife assembly guide rail 5 and the lower knife assembly guide rail 6 are both fixed on the frame 1. The upper knife assembly 2.1 and the lower knife assembly 2.2 work together to cut the paper longitudinally. The cutter in the upper knife assembly 2.1 can be raised or lowered by a cylinder. The first winding arm 8 and the second winding arm 9 are used to support and drive the paper core 10 to rotate so as to wind the slit paper onto the paper core. Both the first winding arm 8 and the second winding arm 9 are mounted on the winding arm guide rail 7. The slitting knife assembly and the winding arms are existing technologies. The paper core 10 is characterized by: the paper core 10 including a first paper core 10.1 and a second paper core 10.2 coaxially arranged, both of which are tubular. An air shaft 10.4 is provided inside the tubular cavity of the first paper core 10.1 and the second paper core 10.2. After the air shaft 10.4 is inflated, it connects the first paper core 10.1 and the second paper core 10.2 into one unit. To prevent the paper rollers from merging during the winding process, an annular gasket 10 is coaxially arranged between the first paper core 10.1 and the second paper core 10.2 to separate them. .3, The annular gasket 10.3 is a steel gasket; a third slitting blade assembly 3 is also provided between the first slitting blade assembly 2 and the second slitting blade assembly 4, corresponding to the interval between the first paper core 10.1 and the second paper core 10.2. The structure of the third slitting blade assembly 3 is the same as that of the first slitting blade assembly 2. The upper blade assembly and the lower blade assembly of the third slitting blade assembly 3 are also respectively set on the upper blade assembly guide rail 5 and the lower blade assembly guide rail 6. The upper blade assembly and the lower blade assembly of the third slitting blade assembly 3 can be moved on the upper blade assembly guide rail 5 and the lower blade assembly guide rail 6 respectively to adjust their positions. The position of the third slitting blade assembly 3 is adjustable, which facilitates adjustment of its position according to the actual situation on site.

[0027] In this invention, the lengths of the first paper core 10.1 and the second paper core 10.2 can be the same or different, preferably the lengths of the first paper core 10.1 and the second paper core 10.2 are the same.

[0028] The annular gasket 10.3 in this invention has a certain thickness, and its function is to separate the first paper core 10.1 and the second paper core 10.2 to prevent the paper rollers from sticking together during the paper winding process. Preferably, the thickness of the annular gasket 10.3 is 4-8 mm, and more preferably, the thickness of the annular gasket 10.3 is 6 mm.

[0029] To prevent the paper rollers from sticking together during the paper winding process, it is preferable that the ends of the first paper core 10.1 and the second paper core 10.2 near the annular gasket 10.3 are set as bevels (as shown in the attached diagram). Figure 4 (as shown), or set as an arc surface.

[0030] As attached Figure 5 As shown, to prevent the paper rollers from sticking together during the paper winding process, it is preferable that a thickening layer 10.5 is provided at the ends of the first paper core 10.1 and the second paper core 10.2 away from the annular gasket 10.3, so that the outer diameter of the ends of the first paper core 10.1 and the second paper core 10.2 away from the annular gasket 10.3 is 0.1-0.3 mm larger than the outer diameter of the ends closer to the annular gasket 10.3. This thickening layer 10.5 can be integrally formed with the paper core, or it can be added after the ends of the first paper core 10.1 and the second paper core 10.2. By providing the thickening layer 10.5, a tension difference can be created between the inner and outer ends of the first paper core 10.1 and the second paper core 10.2 during the winding process. The paper is less likely to shift towards the end closer to the annular gasket during the winding process, making it less likely for the two paper rollers to stick together, thus ensuring normal rewinding production.

[0031] The air shaft 10.4 used in this invention is existing technology, specifically a tile-type air shaft manufactured by Zibo Haochuan Machinery Equipment Manufacturing Plant. After inflation, its shaft can fully contact and fix the inner surface of the paper core, maintaining good roundness even with changes in air pressure, thus reducing paper core deformation. During assembly, with the air shaft de-inflated, the first paper core 10.1, the annular gasket 10.3, and the second paper core 10.2 are sequentially threaded onto the air shaft 10.4. After adjusting the positions of each component, the air shaft 10.4 is inflated, connecting the first paper core 10.1, the annular gasket 10.3, and the second paper core 10.2 into a single unit.

[0032] In operation, the two ends of the paper core connected by the air shaft 10.4 are respectively mounted on the first winding arm 8 and the second winding arm 9, and the position of the third slitting blade assembly 3 is adjusted to the slitting position. After the equipment is started, the paper is longitudinally slit by the first slitting blade assembly 2, the third slitting blade assembly 3, and the second slitting blade assembly 4. The two sheets of paper cut by the three slitting blade assemblies are wound onto the first paper core 10.1 and the second paper core 10.2 respectively. Under the rotation of the first winding arm 8 and the second winding arm 9, the two sheets of paper are wound into paper rolls on the first paper core 10.1 and the second paper core 10.2 respectively. After the paper is wound, the two paper rolls and the paper core as a whole are unloaded from the winding arm. After the air shaft 10.4 is deflated, the first paper core 10.1 and the second paper core 10.2 can be separated, and the two paper rolls are separated from the air shaft to become independent paper rolls. When it is not necessary to produce small-sized paper roll products, the paper core of the paper roll station can be replaced with a regular paper core, and the upper and lower blade components of the third slitting blade assembly 3 can be detached.

[0033] This invention allows for the rewinding of smaller paper rolls based on existing slitting and rewinding machines. For example, while the original slitting and rewinding machine can rewind paper rolls with a minimum width of 400mm, this invention can rewind paper rolls with a minimum width of 200mm, greatly improving the production flexibility of the slitting and rewinding machine.

[0034] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A slitting and rewinding machine, comprising multiple paper winding stations, each paper winding station being equipped with a first slitting blade assembly, a second slitting blade assembly, two winding arms, and a paper core disposed between the two winding arms, characterized in that: The paper core includes a first paper core and a second paper core arranged coaxially. Both the first paper core and the second paper core are tubular paper cores. The first paper core and the second paper core are connected as one unit by an air expansion shaft arranged in their tubes. An annular gasket is coaxially arranged between the first paper core and the second paper core to separate them. A third slitting knife assembly is also arranged between the first slitting knife assembly and the second slitting knife assembly at each paper winding station, corresponding to the interval between the first paper core and the second paper core.

2. The slitting and rewinding machine according to claim 1, characterized in that: The ends of the first and second paper cores near the annular gasket are set as bevels or arc surfaces.

3. The slitting and rewinding machine according to claim 2, characterized in that: The outer diameter of the end of the first and second paper cores furthest from the annular gasket is 0.1-0.3 mm larger than the outer diameter of the end closest to the annular gasket.

4. The slitting and rewinding machine according to claim 1, 2, or 3, characterized in that: The annular gasket is a steel gasket with a thickness of 4-8 mm.

5. The slitting and rewinding machine according to claim 4, characterized in that: The position of the third slitting blade assembly is adjustable.

6. A paper core structure for a slitting and rewinding machine, characterized in that: It includes a first paper core and a second paper core arranged coaxially. Both the first paper core and the second paper core are tubular paper cores. The first paper core and the second paper core are connected as one unit by an air expansion shaft arranged in their tubes. An annular gasket is coaxially arranged between the first paper core and the second paper core to separate the first paper core and the second paper core.

7. The paper core structure for a slitting and rewinding machine according to claim 6, characterized in that: The ends of the first and second paper cores near the annular gasket are set as bevels or arc surfaces.

8. The paper core structure for a slitting and rewinding machine according to claim 7, characterized in that: The outer diameter of the end of the first and second paper cores furthest from the annular gasket is 0.1-0.3 mm larger than the outer diameter of the end closest to the annular gasket.

9. The paper core structure for a slitting and rewinding machine according to claim 6, 7, or 8, characterized in that: The annular gasket is a steel gasket with a thickness of 4-8 mm.

10. The paper core structure for a slitting and rewinding machine according to claim 9, characterized in that: The thickness of the annular gasket is 6 mm.

Images