A sizing mechanism and a device for making corrugated paper

Abstract

The utility model relates to corrugated paperboard industry field especially points to a kind of sizing mechanism and a kind of equipment of preparation corrugated paper, still be equipped with adjusting doctor within body, after the adjacent setting of pulp basin board and glue roller, the cavity that forms storage glue, and the adjacent setting of pulp basin board and glue roller makes the first gap that control glue outflow is formed on cavity, adjusting doctor is located outside cavity, adjusting doctor has the adjusting plate that can be close to glue roller in, so that adjusting plate and glue roller form the second gap that control glueing amount;The utility model selects the close setting relationship of pulp basin board and glue roller, forms the first gap that glue outflows, only the movement of the roll surface of glue roller, so that the shear rate of glue is far lower than the shear rate in prior art, at this time, glue viscosity proportional to shear force, naturally also just not reach the condition that forming toughening phenomenon, at this time, glue on glue roller can be controlled by the gap in cavity naturally.

Description

Technical Field

[0001] This utility model relates to the corrugated cardboard industry, and more particularly to a sizing mechanism and a device for preparing corrugated paper. Background Technology

[0002] Corrugated cardboard is composed of a core liner and a face liner, which are bonded together with adhesive. The key equipment for applying the adhesive is the sizing mechanism (such as...). Figure 10 accomplish).

[0003] In this mechanism, the amount of glue on the surface of the gluing roller X needs to be further controlled by the sizing control roller Y to ensure gluing accuracy. With increasing demands for production efficiency, some single-facers have increased their papermaking speed to 400m / min in pursuit of higher economic efficiency. Under this condition, the existing sizing mechanism has gradually revealed a series of problems, which are analyzed in detail below:

[0004] 1. The adhesive exhibits a "tempering phenomenon" at high speeds, leading to uncontrolled adhesive application.

[0005] In existing gluing mechanisms, the rotation direction of the control roller Y is the same as that of the gluing roller X. When the rotation speeds of both rollers increase synchronously with the papermaking speed, the glue will exhibit a "hardening phenomenon," which is essentially a shear thickening effect caused by high-speed rotation. The specific process is as follows:

[0006] The high-speed rotating gluing roller X drives the glue on its surface to move, while the scraping and controlling action of the control roller Y on the glue on the surface of the gluing roller X creates a significant flow velocity difference between the glue on the surface of the gluing roller X and the static glue in the slurry basin Z (e.g., Figure 10 As shown in the figure, the flow rate difference causes relative friction between the two streams of glue. This friction acts directly on the glue on the roller surface of the glue roller X, forming a continuous high shear stress. When the rotation speed increases to the critical value, the glue exhibits shear thickening characteristics under the action of high shear stress. At this time, the scraping and control ability of the traditional control roller Y can no longer overcome the resistance of the high viscosity glue, resulting in the glue amount on the roller surface of the glue roller X being completely out of control.

[0007] II. Bearing clearance and roller characteristics leading to clearance runaway and collision risks

[0008] Both the control roller Y and the gluing roller X are mounted in the sizing mechanism via bearings. However, the bearings themselves have an inherent characteristic that the center of rotation of the inner ring does not coincide with the center of rotation of the outer ring. This characteristic, combined with high-speed operation and the roller structure, further exacerbates the mechanism problem.

[0009] Both the control roller Y and the glue-applying roller X are long-shaft structures with no support in the middle. When rotating at high speed, they are prone to bending and deformation due to centrifugal force. If the gap between the rollers is forcibly reduced in order to control the amount of glue, the bent rollers will collide directly under the action of centrifugal force, further damaging the stability of the equipment.

[0010] High-speed papermaking means that the time the paper stays in the equipment is greatly reduced, and the time left for the glue to be heated and dried is also reduced accordingly. The excessive gap between the rollers caused by the bearing clearance makes it impossible to effectively control the amount of glue, so that the glue cannot be completely dried in a short time, resulting in the quality defect of glue not being dried. Utility Model Content

[0011] To address the aforementioned problems, this utility model provides a sizing mechanism, which aims to solve the problem of unoptimized glue application caused by glue curing.

[0012] This invention provides a sizing mechanism, and secondly, it addresses the problem of uncontrollable gaps.

[0013] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sizing mechanism, comprising a body, wherein a glue roller and a glue basin plate are provided inside the body, characterized in that an adjusting scraper is also provided inside the body, and the glue basin plate and the glue roller are arranged adjacent to each other to form a cavity for storing glue, and the adjacent arrangement of the glue basin plate and the glue roller forms a first gap on the cavity to control the flow of glue, the adjusting scraper is located outside the cavity, and the adjusting scraper has an adjusting plate that can move closer to the glue roller, so that the adjusting plate and the glue roller form a second gap to control the amount of glue applied.

[0014] The beneficial effects of this utility model are:

[0015] 1. In contrast to the problem of excessive shear force in the prior art, this utility model adopts a close-range arrangement between the slurry plate and the glue roller to form a first gap through which glue flows out. Only the roller surface of the glue roller moves, making the shear rate of the glue much lower than that in the prior art. At this time, the glue viscosity, which is proportional to the shear force, naturally does not meet the conditions for forming a hardening phenomenon. At this time, the glue on the glue roller can naturally be controlled by the gap in the cavity.

[0016] 2. To address the collision sharing and gap loss caused by bearing clearance, this invention uses an adjusting scraper outside the cavity to further control the amount of adhesive applied by the glue roller. Specifically, a movable adjusting plate is selected in the adjusting scraper. By moving the adjusting plate closer to the glue roller, the second gap between the adjusting plate and the glue roller can be shortened, thereby achieving a more precise control over the amount of adhesive applied.

[0017] It is easy to see that the existence of the adjusting scraper and the first gap is to replace the use of the control roller. On this basis, the uncontrollable gap caused by the use of bearings can be solved by selecting the adjusting scraper.

[0018] Furthermore, it also includes an eccentric wheel, an adjusting scraper with an adjusting shaft, an adjusting plate set on the adjusting shaft, and a crank arm fitted on the end of the adjusting shaft. The outer ring surface of the eccentric wheel abuts against the crank arm. Based on the relationship between arc length and angular displacement, we can determine the radius, which is the length of the crank arm, through circular motion. After the eccentric wheel pushes the crank arm to make an arc motion, we can obtain a more precise angular displacement of the adjusting shaft. From the formula θ = s / r, we know that with the arc length S unchanged, by selecting a crank arm with a larger radius, we can obtain a smaller angular displacement, thereby achieving the purpose of precisely controlling the length of the second gap.

[0019] The eccentric wheel and crank arm can be installed inside the main body or on the outer wall of the main body.

[0020] In this specific embodiment, a motor is provided inside the main body, and the motor shaft of the motor is connected to the shaft of the aforementioned eccentric wheel.

[0021] Regarding the fixing method of the adjusting plate, in this specific embodiment, it also includes a mounting base and a scraper pressure plate. The mounting base is set on the roller surface of the adjusting shaft, and the scraper pressure plate presses the adjusting plate onto the mounting base. The purpose of this design is to facilitate the replacement of the adjusting plate in the future.

[0022] The mounting base is also equipped with an adjustment device. The inner surface of the scraper pressure plate and the adjustment plate that are in contact with each other is the limiting surface of the step. The step and the adjustment plate are corresponding to each other. The output end of the adjustment device is connected to the bottom of the scraper pressure plate. Under the action of the adjustment device, pushing the scraper pressure plate can drive the position of the adjustment plate to make fine adjustments, ensuring that the gap between each area of ​​the adjustment plate and the glue roller tends to be the same, reducing errors.

[0023] In this specific embodiment, the adjustment device consists of several limit blocks with adjustment screws. The adjustment screws and limit blocks are threaded together. By rotating the adjustment screws, the bolts of the adjustment screws move against the scraper pressure plate.

[0024] Considering the need to clean the adjusting plate, a cylinder is also included. The output end of the cylinder is connected to the outer end of the crank arm. Under the action of the cylinder, the crank arm has a relatively large rotation range. At this time, the adjusting plate is away from the upper rubber roller, and the adjusting plate can be cleaned from all directions.

[0025] It is important to note that the direction in which the cylinder drives the crank arm to rotate is the same as the direction in which the eccentric wheel drives the crank arm to rotate.

[0026] The main body is also equipped with a slurry basin, which is located below the upper glue roller and the adjusting scraper. The glue scraped off flows into the slurry basin, and the slurry basin also catches the glue that occasionally falls from the upper glue roller.

[0027] An apparatus for preparing corrugated paper, characterized in that it includes the aforementioned sizing mechanism. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention.

[0029] Figure 2 This is a perspective view of the present invention in cross-section.

[0030] Figure 3 yes Figure 2 A 3D view from another direction.

[0031] Figure 4 This is a perspective view of the present invention from another sectional view.

[0032] Figure 5 yes Figure 4 Enlarged diagram of point A.

[0033] Figure 6 It is a 3D diagram of adjusting the scraper.

[0034] Figure 7 yes Figure 6 Exploded view.

[0035] Figure 8 This is a diagram showing the fit between the adjusting block and the scraper plate.

[0036] Figure 9 yes Figure 8 Enlarged diagram of point B.

[0037] Figure 10 This is a partial structural diagram of existing technology. Detailed Implementation

[0038] like Figure 1-9 As shown, a sizing mechanism includes a body 1, which contains an applicator roller 2 and a sizing basin plate 3. The body 1 also contains an adjusting scraper 4. The sizing basin plate 3 and the applicator roller 2 are arranged adjacently to form a cavity for storing glue. The adjacent arrangement of the sizing basin plate 3 and the applicator roller 2 creates a first gap d1 on the cavity to control the flow of glue. The adjusting scraper 4 is located outside the cavity and has an adjusting plate 41 that can move closer to the applicator roller 2, creating a second gap d2 between the adjusting plate 41 and the applicator roller 2 to control the amount of glue applied.

[0039] The beneficial effects of this utility model are:

[0040] 1. In contrast to the problem of excessive shear force in the prior art, this utility model adopts a close-range arrangement between the slurry plate 3 and the glue roller 2, forming a first gap d1 through which glue flows out. Only the roller surface of the glue roller 2 moves, making the shear rate of the glue much lower than that in the prior art. At this time, the glue viscosity, which is proportional to the shear force, naturally does not meet the conditions for forming a hardening phenomenon. At this time, the glue on the glue roller 2 can naturally be controlled by the second gap d2 in the cavity.

[0041] 2. To address the collision sharing and gap loss caused by bearing clearance, this invention employs an adjusting scraper 4 outside the cavity to further control the amount of adhesive applied to the gluing roller 2. Specifically, the adjusting scraper 4 incorporates a movable adjusting plate 41. By moving the adjusting plate 41 closer to the gluing roller 2, the second gap d2 between the adjusting plate 41 and the gluing roller 2 can be shortened, thereby achieving a more precise control over the amount of adhesive applied.

[0042] It is not difficult to see that the existence of the adjusting scraper 4 and the first gap d1 is to replace the use of the control roller Y. On this basis, the uncontrollable gap caused by the use of bearings can be completely solved by selecting the adjusting scraper 4.

[0043] Furthermore, it also includes an eccentric wheel 51, and the adjusting scraper 4 includes an adjusting shaft 42. The adjusting plate 41 is set on the adjusting shaft 42, and a crank arm 43 is sleeved on the end of the adjusting shaft 42. The outer ring surface of the eccentric wheel 51 abuts against the crank arm 43. Based on the relationship between arc length and angular displacement, we can know the radius, which is the length of the crank arm 43, through circular motion. After the eccentric wheel 51 pushes the crank arm 43 to make arc motion, we can obtain a more precise angular displacement of the adjusting shaft 42. From the formula θ = s / r, we know that when the arc length S remains unchanged, by selecting a crank arm 43 with a larger radius, we can obtain a smaller angular displacement, thereby achieving the purpose of precisely controlling the length of the second gap d2.

[0044] The eccentric wheel 51 and the crank arm 43 can be installed inside the body 1 or on the outer wall of the body 1.

[0045] In this specific embodiment, a motor 6 is provided inside the main body 1, and the motor shaft of the motor 6 is connected to the shaft of the eccentric wheel 51.

[0046] Regarding the fixing method of the adjusting plate 41, in this specific embodiment, it also includes a mounting base 44 and a scraper pressure plate 45. The mounting base 44 is set on the roller surface of the adjusting shaft 42, and the scraper pressure plate 45 presses the adjusting plate 41 onto the mounting base 44. The purpose of this design is to facilitate the replacement of the adjusting plate 41 in the future.

[0047] The mounting base 44 is also equipped with an adjustment device. The inner surface of the scraper pressure plate 45 and the adjustment plate 41 that are in contact with each other is the limiting surface of the step 45a. The step 45a and the adjustment plate 41 are corresponding to each other. The output end of the adjustment device is connected to the bottom of the scraper pressure plate 45. Under the action of the adjustment device, pushing the scraper pressure plate 45 can drive the position of the adjustment plate 41 to be finely adjusted, so as to ensure that the gap between each area of ​​the adjustment plate 41 and the glue roller 2 tends to be the same, thereby reducing the error.

[0048] In this specific embodiment, the adjustment device consists of several limiting blocks 71 with adjusting screws. The adjusting screws (not shown in the figure) are threadedly connected to the limiting blocks 71. By rotating the adjusting screws, the bolts of the adjusting screws move against the scraper pressure plate 45.

[0049] Considering that the adjusting plate 41 needs to be cleaned, a cylinder 8 is also included. The output end of the cylinder 8 is connected to the outer end of the crank arm 43. Under the action of the cylinder 8, the crank arm 43 has a relatively large rotation range. At this time, the adjusting plate 41 is away from the upper rubber roller 2, and the adjusting plate 41 can be cleaned in all directions.

[0050] It should be noted that the direction in which the cylinder 8 drives the crank arm 43 to rotate is the same as the direction in which the eccentric wheel 51 drives the crank arm 43 to rotate.

[0051] Inside the main body 1, there is also a slurry basin 9, which is located below the upper glue roller 2 and the adjusting scraper 4. The scraped glue flows into the slurry basin 9, and catches the glue that occasionally falls from the upper glue roller 2.

[0052] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A sizing mechanism, comprising a body, wherein a gluing roller and a sizing basin plate are disposed within the body, characterized in that, The body is also equipped with an adjusting scraper. After the slurry basin plate and the upper glue roller are arranged adjacent to each other, a cavity for storing glue is formed. The adjacent arrangement of the slurry basin plate and the upper glue roller creates a first gap on the cavity to control the flow of glue. The adjusting scraper is located outside the cavity. The adjusting scraper has an adjusting plate that can move closer to the upper glue roller, so that the adjusting plate and the upper glue roller form a second gap to control the amount of glue applied.

2. The sizing mechanism according to claim 1, characterized in that, It also includes an eccentric wheel, an adjusting scraper with an adjusting shaft, an adjusting plate set on the adjusting shaft, and a crank arm sleeved on the end of the adjusting shaft, with the outer ring surface of the eccentric wheel abutting against the crank arm.

3. The sizing mechanism according to claim 2, characterized in that, The eccentric wheel and crank arm are housed within the main body.

4. The sizing mechanism according to claim 2, characterized in that, The main body contains a motor, and the motor shaft is connected to the shaft of the eccentric wheel.

5. The sizing mechanism according to claim 2, characterized in that, It also includes a mounting base and a scraper pressure plate. The mounting base is set on the roller surface of the adjusting shaft, and the scraper pressure plate presses the adjusting plate onto the mounting base.

6. The sizing mechanism according to claim 5, characterized in that, The mounting base is also equipped with an adjustment device. The inner surface of the scraper pressure plate and the adjustment plate that are in contact with each other is the limiting surface of the step. The step and the adjustment plate are corresponding to each other. The output end of the adjustment device is connected to the bottom of the scraper pressure plate.

7. The sizing mechanism according to claim 6, characterized in that, The adjustment device consists of several limit blocks with adjustment screws. The adjustment screws and limit blocks are threaded together. By rotating the adjustment screws, the bolts of the adjustment screws move against the scraper pressure plate.

8. The sizing mechanism according to claim 2, characterized in that, It also includes a cylinder, the output end of which is connected to the outer end of the crank arm.

9. A sizing mechanism according to claim 8, characterized in that, The direction in which the cylinder drives the crank arm to rotate is the same as the direction in which the eccentric wheel drives the crank arm to rotate.

10. A sizing mechanism according to claim 2, characterized in that, The eccentric wheel and crank arm are mounted on the outer wall of the main body.

11. An apparatus for preparing corrugated paper, characterized in that, It includes the sizing mechanism as described in any one of claims 1-10.

Images