Gluing machine for preparing corrugated board

Abstract

The utility model relates to a gluing machine for preparing corrugated boards, and belongs to the technical field of corrugated papers.The gluing machine comprises two wallboards, a gluing roller and a glue scraping roller, the two wallboards are arranged in a spaced mode, and the gluing roller and the glue scraping roller are parallel to each other and rotationally arranged between the two wallboards; eccentric components used for adjusting the gap between the glue scraping roller and the glue spreading roller are arranged between the end of the glue scraping roller and the wall plates, adjusting assemblies are arranged on the side walls, deviating from each other, of the wall plates, and the adjusting assemblies are used for adjusting rotation of eccentric gear bearing seats at the end of the glue scraping roller; the device has the effect of improving the adjustment precision of the gap between the two sides (the operation side and the power side) of the glue spreading roller and the glue scraping roller.

Description

Technical Field

[0001] This application relates to the technical field of corrugated paper, and in particular to a glue coating machine for preparing corrugated board. Background Technology

[0002] The traditional manufacturing process for corrugated cardboard is as follows: First, a laminating machine produces two-layer single-faced, single-flute cardboard. Then, a gluing machine applies a layer of glue to the flute peaks, and finally, a layer of flat paper is laminated to form a three-layer single-faced, single-flute cardboard. To produce four-layer cardboard, two laminating machines are used to supply two-layer single-faced, single-flute cardboard. The top layer is then glued to the flute peaks by the gluing machine, and these layers are laminated together to produce a four-layer single-faced, double-flute cardboard. To produce five-layer cardboard, the bottom layer of single-faced, single-flute cardboard is then glued to the flute peaks by the second gluing unit of the same machine, and finally, a layer of flat paper is laminated to form a five-layer double-faced, double-flute cardboard.

[0003] The new manufacturing process for producing double-walled corrugated paperboard, as well as three- and four-layer paperboard, involves the following steps: First, a corrugating machine produces two layers of double-walled corrugated paperboard with the corrugations facing each other. Then, a single-layer gluing machine applies a layer of glue to the corrugated paper's flute peaks. Finally, this is combined with a layer of flat paper to form a single-sided double-walled three-layer paperboard. When producing four-layer paperboard, another single-layer gluing machine applies glue to the flute peaks of the corrugated paperboard. Finally, this is combined with a layer of flat paper to form a double-sided double-walled four-layer paperboard. The compression resistance, edge crush resistance, and bursting strength of this type of paperboard are basically the same as those of traditional double-sided double-walled five-layer paperboard. It saves the middle layer of core paper, and the production process is energy-saving and reduces consumption, significantly lowering manufacturing costs.

[0004] The core components of any glue applicator are essentially two rollers: one is an outer cylindrical roller with a textured surface bearing recesses, used to apply glue to the corrugated cardboard crests; this is known in the industry as the glue applicator roller (or gluing roller, sizing roller, glue roller, etc.). The other is a smooth outer cylindrical roller used to adjust the amount of glue applied; this is known in the industry as the glue scraper roller (or glue leveling roller, sizing roller, sizing control roller, etc.). In the traditional glue applicator structure, the roller's shaft, with bearings at both ends, is fixed to two steel wall plates on the left and right sides. The scraper roller is installed in front of it, with the two roller axes parallel. The scraper roller has bearings at both ends, mounted on the inner eccentric holes of two gears (or on rotatable eccentric bearing seats). The two rollers are connected by a synchronous belt and drive in the same direction. The eccentric bearing seat mechanism is designed to automatically adjust the gap between the scraper roller and the glue applicator roller from 0.05-1mm by slight rotation of the eccentric seat, thereby controlling the thickness of the glue application. This is the basic principle of the eccentric bearing seat mechanism for adjusting the amount of glue applied.

[0005] Traditional glue-applying mechanisms have a power side on one side and an operating side on the other. On the power side, a motor with an external gear shaft drives an intermediate roller, which in turn adjusts the gap between the two rollers on the power side by adjusting an eccentric bearing. On the operating side, a long drive shaft (synchronous shaft) is installed inside the intermediate roller on the power side, extending to the outside of the operating side wall panel. Another intermediate roller of the same size is mounted on this shaft, and an eccentric bearing of the same size is adjusted. This method can only achieve basic synchronization and simultaneous adjustment on both sides, making the two rollers roughly parallel. However, it lacks precision when controlling gap adjustments within the micrometer range. There are two reasons for this: First, the transmission method is a two-stage transmission with a long transmission chain. The gears have backlash in both forward and reverse rotation, and even with a backlash-eliminating mechanism, there is still a slight error in gap adjustment. Second, the long drive shaft transmits the motor torque to the intermediate roller on the operating side, resulting in slight variations in torque and causing slight inconsistencies in the parallelism of the two rollers. Utility Model Content

[0006] In order to improve the adjustment accuracy of the gap between the operating side coating roller and the scraper roller, and reduce the error in the adjustment of the gap between the two rollers on the power side and the operating side, this application provides a coating machine for preparing corrugated cardboard.

[0007] The gluing machine for preparing corrugated cardboard provided in this application adopts the following technical solution:

[0008] A gluing machine for preparing corrugated cardboard includes wall panels, a gluing roller, and a scraper roller. Two wall panels are provided and spaced apart. The gluing roller and the scraper roller are parallel to each other and rotatably disposed between the two wall panels. An eccentric component is provided at the end of the scraper roller and between the wall panels for adjusting the gap between the scraper roller and the gluing roller. Adjustment components are provided on the opposite sidewalls of the wall panels for adjusting the rotation of the eccentric gear bearing seat at the end of the scraper roller.

[0009] By adopting the above technical solution, which differs from conventional wheel drive, two adjustment components are used, distributed on the opposite side walls of the wall panel, one on the power side and one on the operation side. This transforms the two-stage transmission structure of the wheel drive into a single-stage transmission structure of the adjustment components on both sides. The two adjustment components directly adjust the eccentric component, replacing the wheel and the drive shaft, thereby improving the gap adjustment accuracy between the coating roller and the scraper roller on the operation side and reducing the error in the gap adjustment between the two rollers on the power side and the operation side.

[0010] Optionally, the eccentric component includes an eccentric gear bearing housing; the adjustment assembly includes a servo motor and a gear shaft, the servo motor is fixed on the frame outside the wall panel, the output end of the servo motor is fixed to one end of the gear shaft, and the gear shaft meshes with the eccentric gear bearing housing.

[0011] By adopting the above technical solution, the servo motor drives the eccentric gear bearing seat to rotate through the gear shaft, thereby adjusting the relative gap between the two rollers (scraper roller and coating roller), converting the two-stage transmission structure of the intermediate wheel drive into a single-stage transmission structure of the servo motors on the left and right sides, thereby improving the gap adjustment accuracy between the coating roller and scraper roller on the operating side and reducing the error in the gap adjustment between the two rollers on the power side and the operating side.

[0012] Optionally, the eccentric component includes an eccentric bearing housing; the adjustment assembly includes a servo geared motor, which is fixed on a frame on the outside of the wall panel, and the output end of the servo geared motor is directly connected to the eccentric bearing housing.

[0013] By adopting the above technical solution, the output end of the servo geared motor is directly connected to the eccentric bearing housing. If a gear shaft is used for transition connection, it is difficult to ensure that the eccentric angle of the gear shaft and the eccentric gear on the left and right sides of the wall panel is completely consistent when assembling the gear shaft and the eccentric gear bearing housing. That is, it is difficult to achieve phase consistency. By using two servo geared motors at both ends, the servo motors have precise position control functions, which is easier and more accurate than mechanical adjustment to ensure that the positions at both ends are consistent, thereby overcoming the problem of phase inconsistency.

[0014] Optionally, the eccentric component includes an eccentric bearing seat; the adjustment assembly includes an electric push rod, one end of the electric push rod body is rotatably connected to the wall panel and the rotation axis is set parallel to the center line of the scraper roller, and the output end of the electric push rod is rotatably connected to the eccentric bearing seat and the rotation axis is set parallel to the center line of the scraper roller.

[0015] By adopting the above technical solution and using an electric push rod to connect to the eccentric bearing seat, the length of the transmission chain is reduced. The electric push rod operates in both directions to adjust the eccentric bearing seat, thereby simultaneously adjusting the gap between the two rollers on both sides of the wall panel, making the gap adjustment more precise.

[0016] Optionally, an encoder is fixed on the eccentric bearing housing.

[0017] By adopting the above technical solution, the encoder converts physical quantities such as the displacement and angle changes of the scraper roller into electrical or digital signals, thereby facilitating the improvement of the accuracy of the gap change between the scraper roller and the coating roller.

[0018] Optionally, a displacement sensor is installed on the electric actuator.

[0019] Optionally, the electric actuator is an electric actuator with a repeatability of 0.005mm-0.01mm.

[0020] By adopting the above technical solution, the repeatability of the electric linear actuator can reach 0.01 mm, and with the addition of an external displacement sensor, the control accuracy can reach 0.005 mm.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. Two adjustment components are used, distributed on the opposite side walls of the wall panel, one on the power side and one on the operation side. This converts the two-stage transmission structure of the intermediate wheel drive into a single-stage transmission structure of the left and right adjustment components. The two adjustment components directly adjust the eccentric component, reducing the intermediate wheel and transmission shaft, shortening the transmission chain, and achieving the effect of improving the gap adjustment accuracy between the coating roller and the scraper roller on the operation side, and reducing the inconsistency of error in the gap adjustment between the power side and the operation side.

[0023] 2. By adopting a direct connection between the output end of the servo geared motor and the eccentric bearing housing, the unique mechanical problems of poor phase adjustment at both ends of intermediate transmission components such as gears and difficulty in eliminating backlash when gears rotate in both directions are overcome.

[0024] 3. By using an electric push rod connected to the eccentric bearing seat, the length of the transmission chain is reduced. The electric push rod operates in both directions to adjust the eccentric bearing seat, and then the electric push rods on both sides of the wall panel simultaneously adjust the gap between the two rollers, making the gap adjustment more precise.

[0025] 4. Using servo motors, servo geared motors, or electric push rods can better achieve automatic constant speed cruise control of corrugated cardboard production lines. Due to changes in order structure, such as changes in the type of raw paper, changes in the grammage per square meter of raw paper, and continuous changes in production speed, the change in the glue application gap is based on the above three conditions. A digital model is established to achieve more accurate and reasonable automated control. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of Embodiment 1 of this application;

[0027] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this application;

[0028] Figure 3 This is a structural schematic diagram of Embodiment 3 of this application.

[0029] In the diagram, 1 is the glue-applying roller; 2 is the glue-scraping roller; 3 is the adjusting assembly; 31 is the servo motor; 32 is the gear shaft; 33 is the servo geared motor; 34 is the electric push rod; 4 is the eccentric component; 41 is the eccentric gear bearing housing; 42 is the eccentric bearing housing; 5 is the encoder; and 6 is the wall panel. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0031] This application discloses a gluing machine for preparing corrugated cardboard.

[0032] Example 1: Reference Figure 1 A coating machine for preparing corrugated cardboard includes two spaced-apart wall panels 6, which are vertically arranged. A coating roller 1 and a scraper roller 2 are rotatably arranged between the two wall panels 6. The central axes of the coating roller 1 and the scraper roller 2 are parallel to each other. A synchronous transmission belt is looped between the coating roller 1 and the scraper roller 2 to form a transmission. The synchronous transmission belt is not shown in the figure.

[0033] refer to Figure 1 An eccentric component 4 is provided between the end of the scraper roller 2 and the wall panel 6. The eccentric component 4 is used to adjust the gap between the scraper roller 2 and the coating roller 1. The eccentric component 4 includes an eccentric gear bearing seat 41, which is installed between the wall panel 6 and the scraper roller 2. Adjustment components 3 are provided on the opposite side walls of the two wall panels 6. The adjustment components 3 include a servo motor 31 and a gear shaft 32. The servo motor 31 is fixedly connected to the frame on the outside of the wall panel 6. The output end of the servo motor 31 is fixedly connected to the gear shaft 32. The gear shaft 32 meshes with the eccentric gear bearing seat 41, thereby adjusting the eccentric gear shaft.

[0034] The bearing seat 41 rotates, simultaneously rotating the scraper roller 2 and completing the eccentric motion. The eccentric gear bearing seat 41 can be a combination of an eccentric bearing, a bearing seat, and a gear ring. The gear ring meshes with the gear shaft 32, thereby adjusting the rotation of the eccentric bearing.

[0035] refer to Figure 1 An encoder 5 is fixed on the eccentric gear bearing housing 41.

[0036] Two adjustment components 3 are used, distributed on the opposite sidewalls of the wall panel 6, one on the power side and one on the operation side. This converts the conventional two-stage transmission structure into a single-stage transmission structure of the adjustment components 3 on the left and right sides. The two adjustment components 3 directly adjust the eccentric component 4, thereby improving the gap adjustment accuracy between the coating roller 1 and the scraping roller 2 on the operation side and reducing the error in the gap adjustment between the two rollers on the power side and the operation side.

[0037] Example 2: Reference Figure 1 and Figure 2The difference from Embodiment 1 is that the eccentric component 4 includes an eccentric bearing seat 42, and the adjustment component 3 includes a servo geared motor 33. The servo geared motor 33 is fixed on the frame outside the wall panel 6, and the output end of the servo geared motor 33 is directly connected to the eccentric bearing seat 42. The eccentric bearing seat 42 mentioned in this embodiment can be an eccentric bearing seat with a non-gear-shaped outer edge. The bearing or copper sleeve on the outer circle of the seat ensures that the seat can rotate during adjustment. The bearing embedded in the eccentric hole ensures that the scraper roller can be driven in the same direction as the coating roller, so as to achieve the ultimate purpose of controlling the thickness of the adhesive during production. This eccentric bearing seat overcomes the unique mechanical problem of the difficulty in eliminating tooth backlash when the gear rotates in both directions.

[0038] In this embodiment, the servo geared motor 33 is directly connected via a flange connection. The flange is hollowed out, with one end connected to the motor flange and the other end connected to the outer wall plate 6 of the eccentric bearing seat 42. A rotatable flange is also mounted on the motor shaft end, with two output shafts installed at 180 degrees vertically. These two output shafts are mounted close to the outer circumference of the eccentric bearing seat 42, ensuring that the eccentric bearing seat 42 can rotate 20-90 degrees. The hollowed-out portion of the flange seat is close to the glue-applying roller 1, ensuring that the synchronous belts on the synchronous pulleys mounted on the shaft ends of the glue-scraping roller 2 and the glue-applying roller 1 can pass through the flange and rotate in the same direction without obstruction. Given the use of two servo geared motors 33 at both ends, if a gear shaft 32 is used for transitional connection, it is not difficult to ensure that the eccentric angles of the gear shafts 32 on both sides of the wall plate 6 are completely consistent with the eccentric gear when the gear shaft 32 and the eccentric gear bearing seat 41 are used together. Since servo motors have precise position control functions, it is easier and more precise to achieve consistent positions at both ends compared to mechanical adjustments, thus overcoming the problem of phase inconsistency. However, while this gear adjustment structure does have the drawback of backlash in the gears when the motor rotates in both directions, the non-toothed eccentric bearing housing directly connected to the motor on the outer edge of this structure overcomes the unique mechanical problem of backlash being difficult to eliminate when the gears rotate in both directions, making it a better solution.

[0039] Example 3: Reference Figure 3 The difference from Embodiment 2 is that the adjustment component 3 includes an electric push rod 34. One end of the electric push rod 34 is rotatably connected to the wall panel 6, and its rotation axis is parallel to the center line of the scraper roller 2. The output end of the electric push rod 34 is rotatably connected to the eccentric bearing seat 42, and its rotation axis is parallel to the center line of the scraper roller 2. A displacement sensor is installed on the electric push rod 34, and the electric push rod 34 adopts an electric push rod 34 with a repeatability accuracy of 0.005mm-0.01mm.

[0040] The implementation principle of a coating machine for preparing corrugated cardboard in this application embodiment is as follows: Two adjustment components 3 are distributed on the opposite side walls of the wall panel 6, one on the power side and one on the operation side. The original two-stage transmission structure of the intermediate wheel drive is converted into a one-stage transmission structure of the left and right adjustment components 3. The two adjustment components 3 directly adjust the eccentric component 4, replacing the intermediate wheel and the transmission shaft, thereby improving the gap adjustment accuracy between the coating roller 1 and the scraper roller 2 on the operation side and reducing the error in the gap adjustment between the two rollers on the power side and the operation side.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gluing machine for preparing corrugated cardboard, comprising wall panels (6), a gluing roller (1), and a scraper roller (2), wherein two wall panels (6) are provided and spaced apart, and the gluing roller (1) and the scraper roller (2) are parallel to each other and rotatably disposed between the two wall panels (6), characterized in that: An eccentric component (4) is provided at the end of the scraper roller (2) and between the wall panel (6) for adjusting the gap between the scraper roller (2) and the coating roller (1). An adjustment component (3) is provided on the opposite sidewalls of the wall panel (6). The adjustment component (3) is used to adjust the rotation of the eccentric gear bearing seat (41) at the end of the scraper roller (2).

2. The gluing machine for preparing corrugated cardboard according to claim 1, characterized in that: The eccentric component (4) includes an eccentric gear bearing seat (41); the adjustment component (3) includes a servo motor (31) and a gear shaft (32). The servo motor (31) is fixed on the frame outside the wall panel (6). The output end of the servo motor (31) is fixed to one end of the gear shaft (32). The gear shaft (32) meshes with the eccentric gear bearing seat (41).

3. The gluing machine for preparing corrugated cardboard according to claim 1, characterized in that: The eccentric component (4) includes an eccentric bearing seat (42); the adjustment component (3) includes a servo geared motor (33), which is fixed on the frame outside the wall panel (6), and the output end of the servo geared motor (33) is directly connected to the eccentric bearing seat (42).

4. The gluing machine for preparing corrugated cardboard according to claim 1, characterized in that: The eccentric component (4) includes an eccentric bearing seat (42); the adjustment component (3) includes an electric push rod (34), one end of the body of the electric push rod (34) is rotatably connected to the wall panel (6) and the rotation axis is set parallel to the center line of the scraper roller (2), and the output end of the electric push rod (34) is rotatably connected to the eccentric bearing seat (42) and the rotation axis is set parallel to the center line of the scraper roller (2).

5. A gluing machine for preparing corrugated cardboard according to claim 2, characterized in that: An encoder (5) is fixed on the eccentric gear bearing housing (41).

6. The gluing machine for preparing corrugated cardboard according to claim 4, characterized in that: A displacement sensor is installed on the electric push rod (34).

7. A gluing machine for preparing corrugated cardboard according to claim 6, characterized in that: The electric push rod (34) is an electric push rod (34) with a repeatability of 0.005mm-0.01mm.

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