A gypsum board cutting device

Abstract

The application discloses a gypsum board cutting device, which comprises a mounting side plate, an upper rotating rod, a lower rotating rod, a brush shaft and a laser length measuring instrument; the upper rotating rod and the lower rotating rod, whose axes are parallel to each other, are connected to the mounting side plate; the periphery of the upper rotating rod is provided with an upper cutter extending along the axis of the upper rotating rod; the periphery of the lower rotating rod is provided with a lower cutter extending along the axis of the lower rotating rod; the brush shaft, whose axis is parallel to the lower rotating rod, is connected to the frame; the brush shaft is covered with a brush roller on the periphery thereof; the laser length measuring instrument is arranged downstream of the upper rotating rod; the brush shaft is arranged on the horizontal axis plane of the lower rotating rod on both sides thereof; the virtual circle formed by the rotating path of the brush roller brush end of the brush shaft and the virtual circle formed by the rotating path of the edge of the lower cutter blade cross each other; the driven and driving brush shafts are arranged on both sides of the horizontal axis plane of the lower rotating rod, so that the brush rollers on the two brush shafts are used to clean the two sides of the edge of the lower cutter after the lower cutter performs the cutting action on the gypsum board, thereby maintaining the cleanliness of the lower cutter.

Description

Technical Field

[0001] This invention relates to the field of gypsum board cutting equipment technology, and more specifically to a gypsum board cutting device. Background Technology

[0002] Currently, in the gypsum board production process, the paper-faced gypsum board, after being formed but not yet dried, needs to be cut to a fixed length before being sent to the dryer for drying. The cutting machine is a key piece of equipment in the gypsum board cutting process.

[0003] In existing technology, the cutting process of gypsum board is accomplished by a pair of symmetrically rotating serrated cutters rotating in opposite directions simultaneously. The gypsum board is continuously cut by feeding it between the two cutters. However, as the cutters continuously cut the gypsum board, gypsum debris becomes trapped in the serrations and other parts of the cutters and is difficult to dislodge due to its own inertia. Although existing technology uses a driven rotating brush roller to clean the cutting edge after each cut, this cleaning operation is ineffective at cleaning the cutting edge, resulting in reduced blade sharpness and poor cutting quality.

[0004] Therefore, there is a need to provide a gypsum board cutting device to solve the problems of poor cleaning effect of the brush roller on the cutter, rapid wear of the brush roller, and difficulty in replacing the brush roller in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a gypsum board cutting device to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] This invention provides a gypsum board cutting device, comprising:

[0008] The mounting side plate has an upper rotating rod and a lower rotating rod with parallel axes connected to its upper shaft. The upper rotating rod is positioned directly above the lower rotating rod. One end of each rotating rod is connected to the output shaft of a servo motor. The upper rotating rod has an upper cutter extending along its axis, and the lower rotating rod has a lower cutter extending along its axis. The cutting edges of both cutters include a serrated edge structure. The upper and lower rotating rods can rotate synchronously in opposite directions under the drive of the servo motor. During rotation, the cutting edges of the upper and lower cutters approach each other and overlap on the same vertical plane to perform a cutting action on the plasterboard. A brush shaft, with its axis parallel to the lower rotating rod, is mounted on the frame. Brush rollers cover its periphery. During rotation, a brush roller cleans the cutting edge of the lower cutter. A laser length measuring instrument, located downstream of the upper rotating rod, measures the conveying length of the gypsum board and provides feedback to control the servo motors connected to the upper and lower rotating rods to drive them to perform the cutting action. Brush shafts are located on both sides of the horizontal axis of the lower rotating rod. The virtual circle formed by the rotation path of the brush roller bristles intersects with the virtual circle formed by the rotation path of the lower cutter's cutting edge. The brush shaft upstream of the lower cutter's rotation path is actively driven by the servo motor to rotate in the opposite direction to the lower cutter's rotation, thus cleaning one side of the lower cutter. The brush shaft downstream of the lower cutter's rotation path is driven by the lower cutter's rotation to clean the other side of the lower cutter.

[0009] Furthermore, a photoelectric sensor is provided on the brush shaft located upstream of the lower cutter's rotation path to sense the position of the lower cutter. When the lower cutter rotates to a position close to the lower rotating rod, the servo motor is activated to drive the brush shaft to rotate. The rotational speed of the brush shaft is equal to the instantaneous rotational speed of the lower cutter.

[0010] Furthermore, the photoelectric sensing element acts on the horizontal position of the lower cutter; wherein, when the lower cutter is at a horizontal position close to the brush shaft, it stops rotating, and the servo motor starts to drive the brush shaft.

[0011] Furthermore, the brush bristle layer on the brush roller is provided in two layers with the central axis of the brush roller as the symmetrical plane; wherein, the brush bristles on one side of the central axis of the brush roller are hard bristle layers, and the brush bristles on the other side are soft bristle layers; the included angle between the hard bristle layer and the soft bristle layer is °; multiple brush bristle layers composed of hard bristle layers and soft bristle layers are arranged around the periphery of the brush roller.

[0012] Furthermore, the brush bristle layer on the brush roller has two layers with the central axis of the brush roller as the symmetrical plane; wherein, the bristles on one side of the central axis of the brush roller are long bristle layers, and the bristles on the other side are short bristle layers. The long bristle layers are used to clean the tooth gaps of the lower cutter, and the short bristle layers are used to clean the tooth edges of the lower cutter; the included angle between the long bristle layers and the short bristle layers is 30°; multiple brush bristle layers composed of long bristle layers and short bristle layers are arranged on the periphery of the brush roller.

[0013] Furthermore, the bristle layer on the brush roller is spirally arranged around its periphery.

[0014] Furthermore, the brush roller includes multiple segmented brush rollers; wherein, the inner wall surface of the segmented brush roller is arc-shaped and fits against the brush shaft, and the outer wall surface of the segmented brush roller is flat; the multiple segmented brush rollers form a regular polygon structure around the peripheral wall of the brush shaft; the two ends of each segmented brush roller are respectively screwed to the peripheral wall of the brush shaft by positioning screws.

[0015] Furthermore, the upper and lower rotating rods are each provided with multiple annular mounting discs arranged linearly along their axial direction, and the upper and lower cutting blades are respectively fixedly mounted on the mounting discs by bolts.

[0016] Furthermore, one side of the mounting plate protrudes from its outer ring wall to form a protrusion, and the upper and lower cutters are mounted on the protrusion.

[0017] Furthermore, the upper rotating rod drives the upper cutter to rotate counterclockwise, and the lower rotating rod drives the lower cutter to rotate clockwise; wherein, the upper cutter and the lower cutter are respectively installed on the protrusion on the downstream side of its rotation direction.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This invention provides driven and active rotating brush shafts on both sides of the horizontal axis of the lower rotating rod. After the lower cutter performs the cutting action on the gypsum board, when the brush shafts rotate to contact the brush ends of the brush rollers, the brush rollers on the two brush shafts continuously clean both sides of the cutting edge of the lower cutter. This maintains the cleanliness of the cutting edge of the lower cutter before the next cutting action, thereby improving the sharpness of the lower cutter and preventing the lower cutter from becoming less sharp due to gypsum board dust getting stuck in the teeth of the cutting edge, which would otherwise cause poor cutting of the gypsum board and result in the facing paper sticking to the board or the boards sticking together. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 A three-dimensional structural diagram of a gypsum board cutting device provided by the present invention;

[0022] Figure 2 This is a schematic diagram showing the conveying position of gypsum board on the gypsum board cutting device.

[0023] Figure 3 for Figure 1 Side section view;

[0024] Figure 4 A side view of the brush roller in one embodiment of the present invention;

[0025] Figure 5 A side view of the brush roller in another embodiment of the present invention;

[0026] Figure 6 A three-dimensional structural diagram of the brush roller in another embodiment of the present invention;

[0027] Figure 7 A three-dimensional structural diagram of the brush roller in another embodiment of the present invention;

[0028] Figure 8 This is a side view of the figure.

[0029] The labels in the diagram represent the following:

[0030] 1. Side plate installation; 11. Upper rotating rod; 12. Lower rotating rod; 13. Upper cutter; 14. Lower cutter; 15. Mounting plate; 151. Protrusion; 2. Brush shaft; 21. Brush roller; 22. Hard bristle layer; 23. Soft bristle layer; 24. Long bristle layer; 25. Short bristle layer; 26. Dividing brush roller; 261. Positioning screw; 3. Laser length measuring instrument. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, the present invention provides a gypsum board cutting device, comprising:

[0033] The mounting side plate 1 has an upper rotating rod 11 and a lower rotating rod 12 with parallel axes connected to its upper shaft. The upper rotating rod 11 is located directly above the lower rotating rod 12. One end of the upper rotating rod 11 and the lower rotating rod 12 are respectively connected to the output shaft of the servo motor. The upper rotating rod 11 has an upper cutting blade 13 extending along its axis on its circumference, and the lower rotating rod 12 has a lower cutting blade 14 extending along its axis on its circumference. The cutting edges of the upper cutting blade 13 and the lower cutting blade 14 include a serrated edge structure. The upper rotating rod 11 and the lower rotating rod 12 can rotate synchronously in opposite directions under the drive of the servo motor. During the rotation of the upper rotating rod 11 and the lower rotating rod 12, the cutting edges of the upper cutting blade 13 and the lower cutting blade 14 can approach each other and coincide on the same vertical plane to perform a cutting action on the gypsum board.

[0034] The brush shaft 2 has its axis parallel to the lower rotating rod 12 and is connected to the mounting side plate 1. The brush shaft 2 has a brush roller 21 covering its periphery. During the rotation of the brush shaft 2, the brush roller 21 is used to clean the cutting edge of the lower cutter 14.

[0035] The laser length measuring instrument 3 is located downstream of the upper rotating rod 11 to measure the conveying length of the gypsum board and to provide feedback control to the servo motor that is connected to the upper rotating rod 11 and the lower rotating rod 12 to drive it to perform the cutting action.

[0036] Among them, brush shafts 2 are respectively provided on both sides of the horizontal axis of the lower rotating rod 12. The virtual circle formed by the rotation path of the brush tip of the brush roller 21 intersects with the virtual circle formed by the rotation path of the edge of the lower cutter 14. The brush shaft 2 located upstream of the rotation path of the lower cutter 14 is actively driven by a servo motor to rotate in the opposite direction to the rotation of the lower cutter 14, so as to clean one side of the lower cutter 14. The brush shaft 2 located downstream of the rotation path of the lower cutter 14 is driven by the rotation of the lower cutter 14 to clean the other side of the lower cutter 14.

[0037] This invention provides driven and active rotating brush shafts 2 on both sides of the horizontal axis of the lower rotating rod 12. After the lower cutter 14 performs the cutting action on the gypsum board, when it rotates to contact the brush end of the brush roller 21, the brush rollers 21 on the two brush shafts 2 continuously clean both sides of the cutting edge of the lower cutter 14. This maintains the cleanliness of the cutting edge of the lower cutter 14 before the next cutting action, thereby improving the sharpness of the lower cutter 14 and preventing the lower cutter 14 from becoming less sharp due to gypsum board dust getting stuck in the teeth of the cutting edge, which would otherwise cause poor cutting of the gypsum board and result in the facing paper sticking to the board or the boards sticking together.

[0038] For the above embodiments provided by the present invention, the specific operation process of the lower cutting knife 14 and the brush shaft 2 is as follows. The laser length measuring instrument 3 is located downstream of the conveying direction of the gypsum board. By measuring the conveying length of the gypsum board, it feedback-controls the servo motor, so as to use the upper rotating rod 11 and the lower rotating rod 12 to drive the upper cutting knife 13 and the lower cutting knife 14 respectively to perform the cutting action on the gypsum board. It should be noted that the upper cutting knife 13 and the lower cutting knife 14 cut the gypsum board once every rotation. Since the lower cutting knife 14 is controlled by the servo motor, it stays for 1 s after one rotation, and the staying position is exactly at the brush end of the brush roller 21 on the actively rotating brush shaft 2, so as to perform the first cleaning on one side of the lower cutting knife 14; when the lower cutting knife 14 starts next time, it will continue to rotate and contact the brush end of the brush roller 21 on the driven rotating brush shaft 2, so as to perform the second cleaning on the other side of the lower cutting knife 14. Furthermore, it can effectively avoid the problem that when the brush assembly is only arranged on one side of the lower cutting knife 14, the brush assembly can only clean one side of the lower cutting knife 14, while the cleaning effect on the other side is not good. It is also beneficial to make the gypsum board debris stuck in the tooth gaps of the lower cutting knife 14 fall off through the two cleaning processes, thereby improving the overall cleaning effect of the cutting edge of the lower cutting knife 14, making the lower cutting knife 14 maintain better sharpness before each cutting action, avoiding the reduction of the sharpness of the lower cutting knife 14, and thus causing the phenomena of the facing paper sticking to the board and the boards being connected during the cutting of the gypsum board, and improving the cutting efficiency of the gypsum board after forming on the gypsum board production line.

[0039] In order to realize the action linkage between the brush shaft 2 and the lower cutting knife 14, and clean one side of the lower cutting knife 14 through the intermittent rotation of the brush shaft 2 to achieve the purpose of energy saving. In this embodiment, more specifically, a photoelectric induction element is provided on the brush shaft 2 located upstream of the rotation path of the lower cutting knife 14 to sense the position of the lower cutting knife 14, so as to start the servo motor to drive the brush shaft 2 to rotate when the lower cutting knife 14 rotates to a position close to the lower rotating rod 12; among them, the rotation speed of the brush shaft 2 is equal to the instantaneous rotation speed of the lower cutting knife 14.

[0040] In order to enable the gypsum board debris brushed by the brush roller 21 to freely fall and be collected by the action of gravity. In this embodiment, more specifically, the photoelectric induction element acts on the horizontal position of the lower cutting knife 14; among them, when the lower cutting knife 14 is in a horizontal position close to the brush shaft 2, it stops rotating, and the servo motor starts to drive the brush shaft 2. In order to clean the lower cutting knife 14 with the brush roller 21 when the lower cutting knife 14 is in the horizontal position, so that the brushed gypsum board debris can freely fall, which is convenient for the collection of the debris.

[0041] In order to improve the cleaning effect of the brush roller 21 on the lower cutting knife 14, several specific embodiments of the brush roller 21 are provided below.

[0042] Such as Figure 4As shown, in one embodiment of the present invention, the brush bristle layer on the brush roller 21 is provided in two layers with the central axis of the brush roller 21 as the symmetrical plane.

[0043] Among them, the bristles on one side of the central axis of the brush roller 21 are hard bristle layer 22, and the bristles on the other side are soft bristle layer 23; the included angle between the hard bristle layer 22 and the soft bristle layer 23 is 30°; multiple bristle layers composed of hard bristle layer 22 and soft bristle layer 23 are arranged on the periphery of the brush roller 21.

[0044] In this embodiment, through the cooperation of the hard bristle layer 22 and the soft bristle layer 23, the hard bristle layer 22 first contacts the debris, loosening it, and then the soft bristle layer 23 brushes the debris off. Because the soft bristle layer 23 is easy to bend, it generates less tension. Compared with the hard bristle layer 22, the soft bristle layer 23 has less kinetic energy when brushing off the debris, thus avoiding debris splashing and reducing the probability of debris falling onto the surface of the gypsum board. This prevents debris from affecting the cleanliness of the gypsum board surface. At the same time, the hard bristle layer 22 and the soft bristle layer 23 alternately act on the lower cutter 14, thereby improving the cleanliness of the lower cutter 14. This ensures that the lower cutter 14 can maintain good sharpness before each cutting action, preventing the lower cutter 14 from becoming less sharp, which could cause poor cutting of the gypsum board and result in the facing paper sticking to the board or the boards sticking together. This improves the cutting efficiency of the gypsum board after forming on the gypsum board production line.

[0045] like Figure 5 As shown, in one embodiment of the present invention, the brush bristle layer on the brush roller 21 is provided in two layers with the central axis of the brush roller 21 as the symmetrical plane.

[0046] Among them, the bristles on one side of the central axis surface of the brush roller 21 are long bristle layer 24, and the bristles on the other side are short bristle layer 25. The long bristle layer 24 is used to clean the tooth gaps of the lower cutter 14, and the short bristle layer 25 is used to clean the tooth edge of the lower cutter 14. The included angle between the long bristle layer 24 and the short bristle layer 25 is 30°. Multiple bristle layers composed of long bristle layer 24 and short bristle layer 25 are arranged on the periphery of the brush roller 21.

[0047] In this embodiment, the long bristle layer 24 and the short bristle layer 25 work together to alternately clean the cutting edge and tooth gaps of the lower cutter 14, thereby maintaining the cleanliness of the lower cutter 14 and enabling it to achieve good sharpness. It should be noted that a certain distance should be maintained between the long bristles in the long bristle layer 24 and the short bristles in the short bristle layer 25. This distance should correspond to the tooth gap width of the serrated edge on the lower cutter 14, so that the long bristles can just penetrate into the tooth gap for cleaning, while the short bristles can just contact the cutting edge without entering the tooth gap. This avoids excessive friction between the cutting edge and the long bristle layer 24, which would reduce the overall durability of the brush roller 21.

[0048] In order to improve its cleaning ability for the lower cutter 14 by changing the arrangement of the bristles, more specifically, such as Figure 6 As shown, in another embodiment of the present invention, the bristle layer on the brush roller 21 is spirally arranged on its periphery.

[0049] In the above embodiments, the one-piece molded brush roller 21 is not convenient for subsequent disassembly and cleaning after being fitted onto the brush shaft 2.

[0050] To solve the above problems, such as Figure 7-8 As shown, in the preferred embodiment provided by the present invention based on the above embodiments, the brush roller 21 includes a plurality of separated brush rollers 26;

[0051] The inner wall of the brush roller 26 is arc-shaped and fits the brush shaft 2, while the outer wall of the brush roller 26 is flat. Multiple brush rollers 26 form a regular polygon structure around the peripheral wall of the brush shaft 2. The two ends of each brush roller 26 are screwed to the peripheral wall of the brush shaft 2 by positioning screws 261.

[0052] In this embodiment, the brush roller 21 is composed of separate brush rollers 26, which makes it easy to disassemble. When a single brush roller 26 is worn excessively, it can be replaced individually, avoiding the problem of having to replace the entire brush roller 21 after local wear.

[0053] For easier installation of the upper cutter 13 and lower cutter 14, please refer to [link / reference needed]. Figure 1-3 As shown, in the preferred embodiment provided by the above embodiments of the present invention, the upper rotating rod 11 and the lower rotating rod 12 are respectively provided with a plurality of annular mounting plates 15 arranged linearly along their axial direction, and the upper cutter 13 and the lower cutter 14 are respectively fixedly installed on the mounting plates 15 by bolts.

[0054] More specifically, one side of the mounting plate 15 protrudes from its outer ring wall to form a protrusion 151, and the upper cutter 13 and the lower cutter 14 are mounted on the protrusion 151.

[0055] More specifically, the upper rotating rod 11 drives the upper cutting blade 13 to rotate counterclockwise, and the lower rotating rod 12 drives the lower cutting blade 14 to rotate clockwise; wherein the upper cutting blade 13 and the lower cutting blade 14 are respectively installed on the protrusion 151 on the downstream side of its rotation direction.

[0056] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A gypsum board cutting device, characterized in that, include: The mounting side plate (1) has an upper rotating rod (11) and a lower rotating rod (12) with parallel axes connected to its upper shaft. The upper rotating rod (11) is located directly above the lower rotating rod (12). One end of the upper rotating rod (11) and the lower rotating rod (12) are respectively connected to the output shaft of the servo motor. The upper rotating rod (11) has an upper cutter (13) extending along its axis on its periphery. The lower rotating rod (12) has a lower cutter (14) extending along its axis on its periphery. The cutting edges of the upper cutter (13) and the lower cutter (14) include a serrated edge structure. The upper rotating rod (11) and the lower rotating rod (12) can rotate synchronously in opposite directions under the drive of the servo motor. During the rotation of the upper rotating rod (11) and the lower rotating rod (12), the cutting edges of the upper cutting blade (13) and the lower cutting blade (14) can approach each other and overlap on the same vertical plane to perform a cutting action on the gypsum board. The brush shaft (2) is parallel to the lower rotating rod (12) and is connected to the mounting side plate (1). The brush shaft (2) is covered with a brush roller (21) on its periphery. During the rotation of the brush shaft (2), the brush roller (21) is used to clean the cutting edge of the lower cutter (14). The laser length measuring instrument (3) is located downstream of the upper rotating rod (11) to measure the conveying length of the gypsum board and to provide feedback control to the servo motors that are connected to the upper rotating rod (11) and the lower rotating rod (12) to drive them to perform the cutting action. Among them, the brush shaft (2) is provided on both sides of the horizontal axis of the lower rotating rod (12), and the virtual circle formed by the rotation path of the brush tip of the brush roller (21) and the virtual circle formed by the rotation path of the edge of the lower cutter (14) intersect. The brush shaft (2) located upstream of the rotation path of the lower cutter (14) is actively driven by a servo motor to rotate in the opposite direction to the rotation of the lower cutter (14) in order to clean one side of the lower cutter (14); The brush shaft (2), located downstream of the rotation path of the lower cutter (14), is driven to rotate by the lower cutter (14) to clean the other side of the lower cutter (14).

2. The gypsum board cutting device according to claim 1, characterized in that, A photoelectric sensing element is provided on the brush shaft (2) located upstream of the rotation path of the lower cutter (14) to sense the position of the lower cutter (14), so that when the lower cutter (14) rotates to a position close to the lower rotating rod (12), the servo motor is started to drive the brush shaft (2) to rotate. The rotational speed of the brush shaft (2) is equal to the instantaneous rotational speed of the lower cutter (14).

3. The gypsum board cutting device according to claim 2, characterized in that, The photoelectric sensing element acts on the horizontal position of the lower cutter (14); When the lower cutter (14) is at a horizontal position close to the brush shaft (2), it stops rotating and the servo motor starts to drive the brush shaft (2).

4. A gypsum board cutting device according to claim 3, characterized in that, The brush bristle layer on the brush roller (21) is provided in two layers with the central axis of the brush roller (21) as the symmetrical plane; Among them, the bristles on one side of the central axis surface of the brush roller (21) are hard bristle layer (22), and the bristles on the other side are soft bristle layer (23). The included angle between the hard hair layer (22) and the soft hair layer (23) is (30)°; Multiple bristle layers, composed of the hard bristle layer (22) and the soft bristle layer (23), are arranged around the periphery of the brush roller (21).

5. A gypsum board cutting device according to claim 3, characterized in that, The brush bristle layer on the brush roller (21) is provided in two layers with the central axis of the brush roller (21) as the symmetrical plane; Among them, the bristles on one side of the central axis surface of the brush roller (21) are long bristle layer (24), and the bristles on the other side are short bristle layer (25). The long bristle layer (24) is used to clean the tooth gaps of the lower cutter (14), and the short bristle layer (25) is used to clean the tooth edge of the lower cutter (14). The angle between the long hair layer (24) and the short hair layer (25) is 30°; Multiple bristle layers, composed of the long bristle layer (24) and the short bristle layer (25), are arranged around the brush roller (21).

6. A gypsum board cutting device according to claim 4 or 5, characterized in that, The bristle layer on the brush roller (21) is spirally arranged around its periphery.

7. A gypsum board cutting device according to claim 6, characterized in that, The brush roller (21) includes a plurality of spaced sub-brush rollers (26). The inner wall of the dividing brush roller (26) is arc-shaped and fits the brush shaft (2), while the outer wall of the dividing brush roller (26) is flat. The plurality of the brush rollers (26) are arranged in a regular polygonal structure around the peripheral wall of the brush shaft (2); Each of the two ends of the brush rollers (26) is screwed to the peripheral wall of the brush shaft (2) by positioning screws (261).

8. A gypsum board cutting device according to claim 7, characterized in that, The upper rotating rod (11) and the lower rotating rod (12) are respectively provided with a plurality of annular mounting discs (15) arranged linearly along their axial direction. The upper cutter (13) and the lower cutter (14) are respectively fixedly installed on the mounting discs (15) by bolts.

9. A gypsum board cutting device according to claim 8, characterized in that, One side of the mounting plate (15) protrudes from its outer ring wall to form a protrusion (151), and the upper cutter (13) and the lower cutter (14) are mounted on the protrusion (151).

10. A gypsum board cutting device according to claim 9, characterized in that, The upper rotating rod (11) drives the upper cutting blade (13) to rotate counterclockwise, and the lower rotating rod (12) drives the lower cutting blade (14) to rotate clockwise; The upper cutter (13) and the lower cutter (14) are respectively mounted on the protrusion (151) on the downstream side of its rotation direction.

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