Manufacturing method of assembled film-coated gypsum board

Abstract

This invention discloses a method for manufacturing prefabricated coated gypsum board. The method involves arranging all gypsum boards in a single row with their ends touching; adjusting the spacing between the gypsum boards and conveying two adjacent boards at a fixed interval on a conveying unit; covering the gypsum board surface with a coated fabric that adheres to and connects the surfaces of the gypsum boards at the fixed interval; cutting notches along the sides of the coated fabric between two adjacent gypsum boards and folding the excess fabric downwards to completely wrap around the two sides of the gypsum board; cutting the coated fabric in the middle between two adjacent gypsum boards and reversing the conveying direction so that the other two sides of the gypsum board are aligned with the other two sides of the gypsum board, thus completely wrapping around the other two sides of the gypsum board. This invention reduces the complexity of controlling the end-to-end spacing between two gypsum boards, and the control method is simple and easy to implement.

Description

Technical Field

[0001] This invention relates to the field of gypsum board coating technology, specifically to a fully automated gypsum board coating method and system for adjusting the spacing between gypsum boards before coating. Background Technology

[0002] The gypsum board lamination process specifically refers to adding a decorative surface material to the outer surface of the gypsum board itself or the facing paper. After the gypsum board has undergone production processes such as slitting and drying, the formed gypsum board is transferred to the lamination system to perform lamination treatment on one surface (usually the back) and four sides of the gypsum board.

[0003] Most existing methods for laminating gypsum board involve adjusting the gypsum board so that the distance between the ends is fixed, covering the surface of the gypsum board with fabric, first laminating the two parallel sides of the gypsum board, and then cutting and wrapping the fabric between the two gypsum boards to achieve the lamination operation on the two parallel sides of the gypsum board.

[0004] However, in current work, most methods use infrared rays to identify the distance between the first and last ends of two adjacent gypsum boards, and then use a distance adjustment system to adjust the distance between the first and last ends to a fixed distance. This fixed distance is generally a measuring cup of the thickness of the gypsum board. However, this operation results in the distance adjustment work between adjacent gypsum boards being inconsistent. It is necessary to calculate the original distance and the distance to be adjusted for gypsum boards with different distances, which makes the distance adjustment calculation difficult and the control method complicated. Summary of the Invention

[0005] To address this issue, the present invention provides a method for manufacturing prefabricated coated gypsum board, thereby solving the technical problem in the prior art where the spacing adjustment between adjacent gypsum boards is not fixed and uniform, requiring separate calculations of the original spacing and the required adjustment for gypsum boards with different spacings, resulting in high calculation difficulty and complex control methods.

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

[0007] A method for manufacturing prefabricated coated gypsum board includes the following steps:

[0008] Step 100: Continuously feed the plasterboard into the conveying unit of the film lamination mechanism, and adjust all the plasterboard to be arranged in a single row so that the ends just touch.

[0009] Step 200: Adjust the spacing between the gypsum boards and convey two adjacent gypsum boards on the conveying unit at a fixed spacing;

[0010] Step 300: Cover the gypsum board surface with a film-coated fabric, and monitor the relative position between the gypsum board and the film-coated fabric in real time. Automatically correct the position of the film-coated fabric so that the film-coated fabric is evenly applied to the gypsum board surface. The film-coated fabric will bond the surfaces of the gypsum boards distributed at fixed intervals together.

[0011] Step 400: Cut a notch on the side of the film-coated fabric between two adjacent gypsum boards, and fold the film-coated fabric that extends beyond the gypsum board downwards to completely wrap the two sides of the gypsum board.

[0012] Step 500: Cut the film covering between two adjacent plasterboards in the middle, turn the plasterboards so that the other two sides of the plasterboards are facing each other, and completely wrap the other two sides of the plasterboards.

[0013] As a preferred embodiment of the present invention, in step 100, the end-to-end spacing of the gypsum board fed into the conveying unit of the film bonding mechanism is not fixed. The acceleration roller group set above the conveying unit is used to adjust all the gypsum boards so that the end-to-end contacts are just right, so as to facilitate the adjustment of two adjacent gypsum boards to be conveyed on the conveying unit at a fixed spacing.

[0014] In a preferred embodiment of the present invention, the transmission speed of the accelerating roller group is greater than the transmission speed of the conveying unit. The conveying unit is provided with a detection component downstream of the accelerating roller group. The detection component uses a high-speed camera to detect whether two adjacent gypsum boards are in perfect contact end to end. By changing the transmission speed of the accelerating roller group, the chasing operation between two adjacent gypsum boards can be achieved.

[0015] As a preferred embodiment of the present invention, when two adjacent gypsum boards are in perfect contact end to end, the transmission speed of the accelerating roller group is adjusted to maintain the current speed for continuous transmission.

[0016] When there is still a gap between two adjacent gypsum boards, the transmission speed of the acceleration roller group is increased to achieve gypsum board chasing operation.

[0017] In a preferred embodiment of the present invention, the distance between the accelerating roller group and the detection component is less than the length of the gypsum board along the conveying direction of the conveying unit, and the accelerating roller group includes multiple sets of evenly distributed rollers, wherein each set of rollers is distributed on both sides of the conveying unit, and the spacing between the multiple sets of rollers decreases sequentially along the conveying direction of the conveying unit, so that the central axes of the two adjacent gypsum boards are simultaneously adjusted to be on the same straight line during the process of adjusting the chasing of the two adjacent gypsum boards.

[0018] In a preferred embodiment of the present invention, the step of adjusting the spacing between gypsum boards in step 200 so that two adjacent gypsum boards are conveyed at a fixed spacing is as follows:

[0019] Multiple blocking components that can move up and down are set below the conveying unit, and an infrared detection unit for detecting gypsum board is set above the conveying unit.

[0020] The current conveying distance of the gypsum board is calculated by combining the conveying speed of the infrared detection unit and the conveying unit;

[0021] The blocking component is adjusted to move upward according to the conveying distance to separate the two gypsum boards for a period of time, and the separation distance between the two gypsum boards is calculated according to the separation time and the conveying speed of the conveying unit.

[0022] Until the partition distance is the same as the fixed spacing, the blocking component moves downward, and the above steps are repeated to continuously convey all the gypsum boards at the fixed spacing.

[0023] In a preferred embodiment of the present invention, the infrared detection unit and the blocking component are on the same vertical line. The infrared detection unit outputs the width of the plasterboard on the conveying unit. Based on the output data of the infrared detection unit, it is determined whether plasterboard has been transmitted to the infrared detection unit.

[0024] As a preferred embodiment of the present invention, the fixed spacing between two adjacent gypsum boards is twice the thickness of the gypsum board, and the film-coated fabric covers the surface of all gypsum boards with equal spacing.

[0025] Wherein, the length of the coated fabric between two adjacent gypsum boards is twice the thickness of the gypsum board, and the total length of the coated fabric extending beyond the two sides of the gypsum board is twice the thickness of the gypsum board, and the length of the coated fabric extending beyond a single side of the gypsum board is the thickness of the gypsum board.

[0026] As a preferred embodiment of the present invention, in steps 400 and 500, the conveying unit is divided into two sections. The first section of the conveying unit is used to fold the film covering fabric on both sides of the gypsum board, and the second section of the conveying unit is used to fold the film covering fabric at both ends of the gypsum board.

[0027] The method for folding the film-coated fabric on each of the four sides of the gypsum board is as follows:

[0028] During the conveying process of the first conveying unit, a cutting mechanism is used to form a slit in the film-coated fabric between two adjacent gypsum boards. The length of the slit is the same as the distance between the two adjacent gypsum boards, and the width of the slit is the length of the film-coated fabric extending beyond one side.

[0029] The film-coated fabric extending beyond the two sides of the gypsum board is folded by covering rollers at different inclination angles and then adhered to the two sides of the gypsum board.

[0030] The film-coated fabric between two adjacent gypsum boards is cut using a cutting mechanism, wherein the cutting position of the cutting mechanism is the center position of the film-coated fabric between the two adjacent gypsum boards.

[0031] The gypsum board is conveyed to the second conveying unit. Covering rollers with different inclination angles are set on both sides of the second conveying unit. The covering rollers gradually fold the film covering material that extends beyond both ends of the gypsum board and stick it to both ends of the gypsum board.

[0032] In a preferred embodiment of the present invention, the cutting mechanism is arranged during the conveying process of the first conveying unit, and the cutting mechanism is located downstream of the covering roller of the first conveying unit.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] Before the lamination process, this invention first ensures that all gypsum boards are in contact end-to-end and aligned on their sides. Then, it adjusts the fixed spacing between each pair of gypsum boards, reducing the complexity of adjusting the end-to-end spacing between two gypsum boards. The control method is simple and easy to implement. After halving the lamination material between two adjacent gypsum boards, the two opposite sides of the gypsum board can be covered. The covered area is exactly the same as the thickness of the gypsum board side, resulting in high uniformity and neatness of the lamination, thus improving the overall production quality of the gypsum board. Attached Figure Description

[0035] 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 described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0036] Figure 1 A schematic flowchart illustrating the method for manufacturing coated gypsum board according to an embodiment of the present invention;

[0037] Figure 2 This is a top view of the coated gypsum board transport system provided in an embodiment of the present invention. Detailed Implementation

[0038] 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.

[0039] like Figure 1 As shown, this invention provides a method for manufacturing prefabricated coated gypsum board. Specifically, the coating process in this embodiment refers to adding a decorative facing material to the outer surface of the gypsum board body or the facing paper. After the gypsum board undergoes production processes such as slitting and drying, the formed gypsum board is transferred to the coating system. One surface (generally the back) and four sides of the gypsum board are coated. Before the coating process, all gypsum boards are aligned end-to-end. Then, the distance between the ends of two gypsum boards is adjusted to a fixed distance, which is twice the thickness of the gypsum board. By halving the coating material between two adjacent gypsum boards, the two opposite sides of the gypsum board can be wrapped. The wrapped area is exactly the same as the thickness of the gypsum board side, resulting in high uniformity and neatness of the coating, thus improving the overall production quality of the gypsum board.

[0040] Therefore, the specific steps in the production method of coated gypsum board include:

[0041] Step 100: Continuously feed the plasterboard into the conveying unit of the film lamination mechanism, and adjust all the plasterboards to be arranged in a single row so that the ends are just touching.

[0042] It should be noted that when the gypsum board is fed into the conveying unit of the laminating mechanism, the gypsum board is first flipped, so that the back of the gypsum board is facing up when it is fed into the conveying unit, which allows for the laminating operation on the back of the gypsum board.

[0043] In step 100, the distance between the first and last gypsum boards fed into the conveying unit of the film bonding mechanism is not fixed. The acceleration roller group set above the conveying unit is used to adjust all the gypsum boards so that the first and last gypsum boards are in contact, so as to facilitate the adjustment of two adjacent gypsum boards to be conveyed on the conveying unit at a fixed distance.

[0044] like Figure 2As shown, the spacing between the gypsum boards fed into the conveying unit may be unstable, meaning the spacing between two adjacent gypsum boards may be too large or too small. This makes the subsequent adjustment of the spacing to a fixed spacing quite complicated. Therefore, in order to reduce the calculation difficulty of subsequent spacing adjustment and improve the stability of the entire coating production line, this embodiment first adjusts all the gypsum boards to a single row so that their ends just touch, before coating. Then, the spacing between two adjacent gypsum boards is adjusted uniformly. This makes the operation of adjusting the spacing between two adjacent gypsum boards simpler and more stable.

[0045] In this embodiment, in order to achieve the board-tracking operation, the transmission speed of the acceleration roller group is greater than the transmission speed of the conveying unit. The conveying unit is provided with a detection component downstream of the acceleration roller group. The detection component uses a high-speed camera to detect whether two adjacent gypsum boards are in perfect contact end to end. The board-tracking operation between two adjacent gypsum boards is achieved by changing the transmission speed of the acceleration roller group.

[0046] When two adjacent gypsum boards are in perfect contact end to end, adjust the transmission speed of the acceleration roller group to maintain the current speed and continue transmission.

[0047] When there is still a gap between two adjacent gypsum boards, the transmission speed of the acceleration roller group is increased to achieve gypsum board chasing operation.

[0048] Normally, the acceleration roller group performs the matching operation between two plasterboards at a fixed transmission speed. However, if the detection component detects that there is still a gap between two adjacent plasterboards, the transmission speed of the acceleration roller group needs to be increased to quickly perform the matching operation.

[0049] In order to achieve the tracking of two plasterboards, the distance between the acceleration roller group and the detection component is less than the length of the plasterboard along the conveying direction of the conveying unit. Therefore, when the detection component detects that there is still a gap between two adjacent plasterboards, the acceleration roller group increases the transmission speed and still acts on both sides of the current plasterboard, thus facilitating the tracking operation.

[0050] The accelerating roller group includes multiple sets of evenly distributed rollers, wherein each set of rollers is distributed on both sides of the conveying unit, and the spacing between the multiple sets of rollers decreases sequentially along the conveying direction of the conveying unit, so as to synchronously adjust the central axes of the two adjacent gypsum boards to be on the same straight line during the process of adjusting the two adjacent gypsum boards.

[0051] As described above, the lamination process involves first covering the surface of all single-row gypsum boards with fabric, then wrapping the two parallel sides of the gypsum boards, and finally wrapping the other two parallel sides. Therefore, to achieve symmetry and completeness when wrapping the sides with fabric, the length of the lamination fabric extending beyond one side of the gypsum board is fixed and equal to the thickness of the gypsum board. Consequently, the central axis of the gypsum boards on the conveying unit must be completely aligned, requiring a correction operation to adjust the side positions of the gypsum boards.

[0052] In this embodiment, the accelerating roller group is specifically set on both sides of the gypsum board, and there are multiple groups of each group. The position of the gypsum board is adjusted sequentially by the multiple groups of rollers so that the central axis of all gypsum boards is at the center of the accelerating roller group. Thus, the accelerating roller group in this embodiment is not only used for the chasing operation between two adjacent gypsum boards, but also can make all gypsum boards on the same straight line, and complete the correction operation of the first and last positions and side positions of the gypsum boards.

[0053] Step 200: Adjust the spacing between the gypsum boards and transport two adjacent gypsum boards on the conveying unit at a fixed spacing.

[0054] It should be noted that the fixed spacing between two adjacent gypsum boards is twice the thickness of the gypsum board, and the film-coated fabric covers the surface of all gypsum boards with equal spacing.

[0055] Wherein, the length of the coated fabric between two adjacent gypsum boards is twice the thickness of the gypsum board, and the total length of the coated fabric extending beyond the two sides of the gypsum board is twice the thickness of the gypsum board, and the length of the coated fabric extending beyond a single side of the gypsum board is the thickness of the gypsum board.

[0056] In order to achieve the covering operation of the surface and four sides of the gypsum board, the length of the covering material beyond a single side of the gypsum board is equal to the thickness of the gypsum board. Therefore, the central axis of the covering material needs to be aligned with the central axis of the gypsum board to ensure a stable and complete covering operation of the two parallel sides of the gypsum board.

[0057] In step 200, the steps for adjusting the spacing between gypsum boards so that two adjacent gypsum boards are conveyed at a fixed spacing are as follows:

[0058] (1) A plurality of blocking components that can move up and down are provided below the conveying unit, and an infrared detection unit for detecting gypsum board is provided above the conveying unit. The infrared detection unit and the blocking components are on the same vertical line. The infrared detection unit outputs the width of the gypsum board on the conveying unit. Based on the output data of the infrared detection unit, it is determined whether gypsum board has been transmitted to the infrared detection unit.

[0059] (2) Combine the conveying speed of the infrared detection unit and the conveying unit to calculate the current conveying distance of the gypsum board. The conveying distance = conveying speed * detection time, where the detection time is the duration for which the infrared detection unit outputs the width of the gypsum board on the conveying unit.

[0060] (3) Adjust the blocking component to move upward according to the conveying distance to separate the two gypsum boards for a time, and calculate the separation distance between the two gypsum boards according to the separation time and the conveying speed of the conveying unit.

[0061] When the conveying distance is the same as the length of the gypsum board along the conveying direction, the blocking component moves upward and blocks the movement of the subsequent gypsum board. The previous gypsum board continues to be conveyed under the drive of the conveying unit, thus creating a separation distance between two adjacent gypsum boards.

[0062] (4) When the partition distance is the same as the fixed spacing, the blocking component moves downward and repeats the above steps to continuously convey all the gypsum boards at the fixed spacing, so that the spacing between all two adjacent gypsum boards is twice the thickness of the gypsum board.

[0063] Step 300: Cover the gypsum board surface with a film-coated fabric, and monitor the relative position between the gypsum board and the film-coated fabric in real time. Automatically correct the position of the film-coated fabric so that the film-coated fabric is evenly applied to the gypsum board surface. The film-coated fabric will bond the surfaces of the gypsum boards distributed at fixed intervals together.

[0064] In order to ensure that the coating fabric is evenly covered on the surface of the gypsum board, the central axis of the gypsum board and the coating fabric needs to be aligned. Therefore, in this embodiment, the central axis of the gypsum board and the coating fabric is monitored in real time. Once a deviation occurs, the position of the coating fabric is automatically corrected so that the coating fabric is evenly covered on the surface of the gypsum board.

[0065] In addition, when applying the laminated fabric, the pressure intensity of the pressing roller is adjusted according to the thickness of the gypsum board so that the laminated fabric adheres to the surface of the gypsum board with a fixed pressure.

[0066] The laminated fabric connects multiple gypsum boards together at fixed intervals, and there is also laminated fabric between two adjacent gypsum boards. In order to cover the two parallel sides of the gypsum boards, it is necessary to cut notches in the laminated fabric between two adjacent gypsum boards. The specific steps are as follows:

[0067] Step 400: Cut a notch on the side of the film-coated fabric between two adjacent gypsum boards, and fold the film-coated fabric that extends beyond the gypsum board downwards to completely wrap the two sides of the gypsum board.

[0068] Step 500: Cut the film covering between two adjacent plasterboards in the middle, turn the plasterboards so that the other two sides of the plasterboards are facing each other, and completely wrap the other two sides of the plasterboards.

[0069] In steps 400 and 500, the conveying unit is divided into two sections. The first section of the conveying unit is used to fold the film covering fabric on both sides of the gypsum board, and the second section of the conveying unit is used to fold the film covering fabric at both ends of the gypsum board.

[0070] The method for folding the film-coated fabric on each of the four sides of the gypsum board is as follows:

[0071] During the conveying process of the first conveying unit, a cutting mechanism is used to form a slit in the film-coated fabric between two adjacent gypsum boards. The length of the slit is the same as the distance between the two adjacent gypsum boards, and the width of the slit is the length of the film-coated fabric extending beyond one side.

[0072] The film-coated fabric extending beyond the two sides of the gypsum board is folded by covering rollers at different inclination angles and then adhered to the two sides of the gypsum board.

[0073] The film-coated fabric between two adjacent gypsum boards is cut using a cutting mechanism, wherein the cutting position of the cutting mechanism is the center position of the film-coated fabric between the two adjacent gypsum boards.

[0074] The gypsum board is conveyed to the second conveying unit. Covering rollers with different inclination angles are set on both sides of the second conveying unit. The covering rollers gradually fold the film covering material that extends beyond both ends of the gypsum board and stick it to both ends of the gypsum board.

[0075] The cutting mechanism is installed during the conveying process of the first conveying unit, and the cutting mechanism is located downstream of the covering roller of the first conveying unit.

[0076] In this embodiment, in order to achieve the covering of the plasterboard side with the laminated fabric without creating creases or excess fabric at the corners of the plasterboard, the laminated fabric between two adjacent plasterboards is cut. It should be noted that in this embodiment, the covering cut of the laminated fabric between two adjacent plasterboards is set before the cutting of the laminated fabric between the two adjacent plasterboards. On the one hand, the laminated fabric between the two adjacent plasterboards is in a taut state, which can prevent the laminated fabric from sticking to the conveying unit or the side of the plasterboard during the cutting process. On the other hand, it reduces the number of times the laminated fabric is cut, and prevents the laminated fabric itself from sticking together and forming wrinkles under the action of glue.

[0077] 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 method for manufacturing prefabricated coated gypsum board, characterized in that, Includes the following steps: Step 100: Continuously feed the plasterboard into the conveying unit of the film lamination mechanism, and adjust all the plasterboard to be arranged in a single row so that the ends just touch. In step 100, the distance between the first and last gypsum boards fed into the conveying unit of the film bonding mechanism is not fixed. The acceleration roller group set above the conveying unit is used to adjust all the gypsum boards so that the first and last gypsum boards are in contact, so as to facilitate the adjustment of two adjacent gypsum boards to be conveyed on the conveying unit at a fixed distance. The conveying speed of the accelerating roller group is greater than the conveying speed of the conveying unit. The conveying unit is provided with a detection component downstream of the accelerating roller group. The detection component uses a high-speed camera to detect whether two adjacent gypsum boards are in perfect contact end to end. The tracking work between two adjacent gypsum boards can be achieved by changing the conveying speed of the accelerating roller group. When two adjacent gypsum boards are in perfect contact end to end, adjust the transmission speed of the acceleration roller group to maintain the current speed and continue transmission. When there is still a gap between two adjacent gypsum boards, the transmission speed of the acceleration roller group is increased to achieve gypsum board chasing operation. The distance between the accelerating roller group and the detection component is less than the length of the gypsum board along the conveying direction of the conveying unit, and the accelerating roller group includes multiple sets of evenly distributed rollers, wherein each set of rollers is distributed on both sides of the conveying unit, and the spacing between the multiple sets of rollers decreases sequentially along the conveying direction of the conveying unit, so that the central axes of the two adjacent gypsum boards are simultaneously adjusted to be on the same straight line during the process of adjusting the chasing of the two adjacent gypsum boards. Step 200: Adjust the spacing between the gypsum boards and convey two adjacent gypsum boards on the conveying unit at a fixed spacing; Step 300: Cover the gypsum board surface with a film-coated fabric, and monitor the relative position between the gypsum board and the film-coated fabric in real time. Automatically correct the position of the film-coated fabric so that the film-coated fabric is evenly applied to the gypsum board surface. The film-coated fabric will bond the surfaces of the gypsum boards distributed at fixed intervals together. Step 400: Cut a notch on the side of the film-coated fabric between two adjacent gypsum boards, and fold the film-coated fabric that extends beyond the gypsum board downwards to completely wrap the two sides of the gypsum board. Step 500: Cut the film covering between two adjacent gypsum boards in the middle, turn the gypsum board to be transported so that the other two sides of the gypsum board are facing the covering roller, and completely wrap the other two sides of the gypsum board.

2. The method for manufacturing prefabricated coated gypsum board according to claim 1, characterized in that, In step 200, the steps for adjusting the spacing between gypsum boards so that two adjacent gypsum boards are conveyed at a fixed spacing are as follows: Multiple blocking components that can move up and down are set below the conveying unit, and an infrared detection unit for detecting gypsum board is set above the conveying unit. The current conveying distance of the gypsum board is calculated by combining the conveying speed of the infrared detection unit and the conveying unit; The blocking component is adjusted to move upward according to the conveying distance to separate the two gypsum boards, and the separation distance between the two gypsum boards is calculated according to the separation time of separating the two gypsum boards and the conveying speed of the conveying unit. Until the partition distance is the same as the fixed spacing, the blocking component moves downward, and the above steps are repeated to continuously convey all the gypsum boards at the fixed spacing.

3. The method for manufacturing prefabricated coated gypsum board according to claim 2, characterized in that, The infrared detection unit and the blocking component are on the same vertical line. The infrared detection unit outputs the width of the plasterboard on the conveying unit. Based on the output data of the infrared detection unit, it is determined whether plasterboard has been transmitted to the infrared detection unit.

4. The method for manufacturing prefabricated coated gypsum board according to claim 2, characterized in that, The fixed spacing between two adjacent gypsum boards is twice the thickness of the gypsum board, and the film-coated fabric covers the surface of all gypsum boards with equal spacing. Wherein, the length of the coated fabric between two adjacent gypsum boards is twice the thickness of the gypsum board, and the total length of the coated fabric extending beyond the two sides of the gypsum board is twice the thickness of the gypsum board, and the length of the coated fabric extending beyond a single side of the gypsum board is the thickness of the gypsum board.

5. The method for manufacturing prefabricated coated gypsum board according to claim 2, characterized in that, In steps 400 and 500, the conveying unit is divided into two sections. The first section of the conveying unit is used to fold the film covering fabric on both sides of the gypsum board, and the second section of the conveying unit is used to fold the film covering fabric at both ends of the gypsum board. The method for folding the film-coated fabric on each of the four sides of the gypsum board is as follows: During the conveying process of the first conveying unit, a cutting mechanism is used to form a slit in the film-coated fabric between two adjacent gypsum boards. The length of the slit is the same as the distance between the two adjacent gypsum boards, and the width of the slit is the length of the film-coated fabric extending beyond one side. The film-coated fabric extending beyond the two sides of the gypsum board is folded by covering rollers at different inclination angles and then adhered to the two sides of the gypsum board. The film-coated fabric between two adjacent gypsum boards is cut using a cutting mechanism, wherein the cutting position of the cutting mechanism is the center position of the film-coated fabric between the two adjacent gypsum boards. The gypsum board is conveyed to the second conveying unit. Covering rollers with different inclination angles are set on both sides of the second conveying unit. The covering rollers gradually fold the film covering material that extends beyond both ends of the gypsum board and stick it to both ends of the gypsum board.

6. The method for manufacturing prefabricated coated gypsum board according to claim 5, characterized in that, The cutting mechanism is installed during the conveying process of the first conveying unit, and the cutting mechanism is located downstream of the covering roller of the first conveying unit.

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