Independent film wrapping device for gypsum board production

Abstract

The application belongs to the technical field of product packaging, and particularly relates to an independent film covering packaging device for gypsum board production, which comprises a diffusion type exhaust assembly, a fixed baffle rod, a heating edge sealing assembly, a pre-partition assembly, a gypsum board conveying assembly and a double-layer film covering assembly, the diffusion type exhaust assembly is arranged in the heating edge sealing assembly, and the fixed baffle rod is arranged on the gypsum board conveying assembly. The application can extrude the air between the two layers of films through the high-pressure gas on the upper and lower sides, can control the sequence of automatic opening of the V-shaped jet pipe, and thus can control the exhaust sequence and direction of the gas. In addition, the pre-partition pressing plate which is lowered before the frame type edge sealing device can isolate and pre-partition the area where the gypsum board is located before exhaust, which can limit the exhaust direction of the gas on one hand and can avoid the influence of the compressed air on the films of other parts on the other hand.

Description

Technical Field

[0001] This invention belongs to the field of product packaging technology, specifically referring to an independent film-coated packaging device for gypsum board production. Background Technology

[0002] When gypsum board is packaged individually, it is usually wrapped with plastic film. The process is quite complicated. Generally, the gypsum board is placed between two layers of plastic film, and then the edges are sealed and cut by heating. The current processing equipment is quite complex and mostly consists of large-scale assembly lines.

[0003] Moreover, the biggest problem in the above process is how to remove the air between the two layers of film to reduce the volume occupied after packaging. Commonly used air extraction devices not only need to control the movement and opening and closing of the air nozzle, but also need to place the air nozzle between the two layers of film first. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an independent film-coating packaging device for gypsum board production. This solution still uses pressure difference to control gas movement, but it does not require the air nozzle to be placed between the lower and upper film. Instead, the air between the two films is squeezed out by the higher pressure gas on both sides. The V-shaped air jet pipe can control the automatic opening sequence of the air jet pipe, thereby controlling the gas discharge sequence and direction.

[0005] In addition, the pre-partitioned pressure plate, which descends before the frame-type edge sealing device, can isolate and pre-partition the area where the gypsum board is located before the exhaust. This can limit the direction of gas exhaust and prevent compressed air from affecting the film in other parts.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes an independent film-coating packaging device for gypsum board production, including a diffuser exhaust assembly, a fixed baffle, a heated edge sealing assembly, a pre-division assembly, a gypsum board conveying assembly, and a double-layer film-coating assembly. The diffuser exhaust assembly is disposed in the heated edge sealing assembly, the fixed baffle is disposed on the gypsum board conveying assembly, the heated edge sealing assembly is slidably disposed on the fixed baffle, the pre-division assembly is disposed on the outside of the heated edge sealing assembly, and the double-layer film-coating assembly is disposed on the gypsum board conveying assembly. Furthermore, the diffuser exhaust assembly includes a limiting slide plate and an air jet pipe. The limiting slide plate is provided with an array of vertical slide grooves, each vertical slide groove having the same top height and the length of the vertical slide grooves decreasing from the middle to both sides. The air jet pipe is slidably disposed in the vertical slide groove.

[0007] Compressed air, which is at a pressure greater than atmospheric pressure, is ejected from the jet pipe, allowing the upper film to adhere tightly to the upper surface of the gypsum board. This achieves the purpose of removing excess air between the lower and upper films before sealing the edges.

[0008] The V-shaped arrangement of the jet pipes enables the gradual exhaust of air from the center to both sides during the descent of the frame-sealing device.

[0009] A compression spring can be installed between the top of the vertical chute and the jet pipe, or the jet pipe can be positioned at the bottom of the vertical chute by weight alone.

[0010] Preferably, the diffuser exhaust assembly further includes a fixed valve plate and a sliding valve plate. The fixed valve plate is disposed at the air inlet end of the jet pipe and has a fixed air inlet hole. The sliding valve plate is slidably disposed on the inner side of the fixed valve plate and has a sliding air inlet hole that matches the fixed air inlet hole. The air inlet end of the jet pipe is connected to an external air source through a pipe.

[0011] By controlling the jet sequence of the jet pipe, not only can the amount of compressed gas used be saved and costs reduced, but the airflow direction between the lower and upper membrane layers can also be controlled through the jet sequence.

[0012] Furthermore, the fixed stop bar is provided with a crossbar portion, which is located below the sliding valve plate. When the sliding valve plate abuts against the crossbar portion, the jet pipe continues to descend, causing the sliding valve plate to retract toward the jet pipe, thereby causing the fixed air inlet and the sliding air inlet to overlap.

[0013] By limiting the sliding valve plate with the crossbar and combining it with the distribution design of the vertical slide grooves, automatic control of the opening sequence of the jet pipe can be achieved.

[0014] Furthermore, the heated edge sealing assembly includes a frame-type edge sealing device, and the pre-partitioning assembly includes a pre-partitioning pressure plate, a spring mounting plate, and a pre-tightening spring. The pre-partitioning pressure plate is engaged and slidably disposed on the outside of the frame-type edge sealing device, the spring mounting plate is fixedly connected to the outside of the frame-type edge sealing device, and the pre-tightening spring is disposed between the pre-partitioning pressure plate and the spring mounting plate.

[0015] The pre-partitioned pressure plate can press against the partitioning pad before the jet pipe is turned on, so that the lower film and the upper film form a channel that connects to the outside on both sides below the frame sealing device. On the one hand, it can prevent the gas ejected from the jet pipe from affecting the lower film and the upper film in other positions. On the other hand, it can match the gas ejected from the jet pipe, and stably and controllably realize the discharge of gas between the lower film and the upper film.

[0016] Preferably, the heated edge sealing assembly further includes a guide rod support, a lifting guide rod, and a crossbeam. The guide rod support is fixed to the side of the frame-type edge sealing device, the lifting guide rod is fixed between the guide rod supports, and a guide frame is provided on the fixed stop bar. The lifting guide rod is slidably disposed in the guide frame.

[0017] Furthermore, the gypsum board conveying assembly includes a roller support and conveying rollers, the conveying roller array is disposed on the roller support, and the fixed stop bar is disposed on the roller support.

[0018] Furthermore, the pre-segmentation assembly also includes a partitioning pad, which is disposed between the roller supports and located directly below the pre-segmentation pressure plate.

[0019] Furthermore, the double-layer coating assembly includes a lower film and an upper film, the lower film being located below the gypsum board and the upper film being located above the gypsum board, and the roller support being provided with a clearance groove for guiding the lower film.

[0020] Since the lower film is held against both the gypsum board and the conveyor rollers, the adjacent conveyor rollers can tension the lower film, resulting in good adhesion to the surface of the gypsum board. Therefore, it is possible to determine whether to install symmetrical diffuser exhaust components under the gypsum board based on the specific circumstances.

[0021] Preferably, the double-layer coating assembly further includes a pressure roller support and an upper pressure roller. The pressure roller support is disposed on the roller support, and the upper pressure roller is rotatably disposed on the pressure roller support. The upper film and the upper pressure roller are in rolling contact.

[0022] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The compressed air ejected from the jet pipe at a pressure greater than atmospheric pressure can make the upper film adhere tightly to the upper surface of the gypsum board, thereby achieving the purpose of expelling excess air between the lower and upper films before sealing the edges.

[0023] (2) The V-shaped jet pipes can achieve the technical effect of gradually discharging air from the middle to both sides during the descent of the frame sealing device.

[0024] (3) A compression spring can be installed between the top of the vertical chute and the jet pipe, or the jet pipe can be positioned at the bottom of the vertical chute by weight alone.

[0025] (4) By controlling the jet sequence of the jet pipe, not only can the amount of compressed gas used be saved and the cost saved, but the air flow direction between the lower and upper membrane can also be controlled by the jet sequence.

[0026] (5) By limiting the sliding valve plate with the crossbar and combining the distribution design of the vertical slide groove, the automatic control of the opening sequence of the jet pipe can be realized.

[0027] (6) The pre-partitioned pressure plate can press against the partitioning pad before the jet pipe is turned on, so that the lower film and the upper film form a channel that is connected to the outside on both sides under the frame sealing device. On the one hand, it can avoid the gas ejected from the jet pipe from affecting the lower film and the upper film in other positions. On the other hand, it can match the gas ejected from the jet pipe and stably and controllably realize the discharge of gas between the lower film and the upper film. Attached Figure Description

[0028] Figure 1 This is a perspective view of an independent film-coated packaging device for gypsum board production proposed in this invention; Figure 2 This is a front view of an independent film-coated packaging device for gypsum board production proposed in this invention; Figure 3 This is a left view of an independent film-coated packaging device for gypsum board production proposed in this invention; Figure 4 This is a top view of an independent film-coated packaging device for gypsum board production proposed in this invention; Figure 5 for Figure 3 A cross-sectional view along section line AA; Figure 6 for Figure 2 A cross-sectional view along the cutting line BB; Figure 7 for Figure 2 A magnified view of a section at point I; Figure 8 for Figure 6 Enlarged view of a section at point II; Figure 9 for Figure 1 Enlarged view of a section at point III; Figure 10 for Figure 6 Enlarged view of a section at point IV; Figure 11 This is a schematic diagram showing the distribution and direction of the air jets on the top and bottom sides of the plasterboard.

[0029] Among them, 1. Diffuser exhaust assembly, 2. Fixed baffle, 3. Heated edge sealing assembly, 4. Pre-division assembly, 5. Gypsum board conveying assembly, 6. Double-layer film covering assembly, 11. Limiting slide plate, 12. Air jet pipe, 13. Fixed valve plate, 14. Sliding valve plate, 21. Crossbar, 22. Guide frame, 31. Frame-type edge sealing device, 32. Guide rod support, 33. Lifting guide rod, 34. Crossbeam, 41. Pre-division pressure plate, 42. Spring mounting plate, 43. Pre-tension spring, 44. Dividing pad, 51. Roller bracket, 52. Conveying roller, 61. Lower film, 62. Upper film, 63. Pressure roller bracket, 64. Upper pressure roller, 111. Vertical chute, 131. Fixed air inlet, 141. Sliding air inlet, 511. Alternating chute.

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

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

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figures 1-10 As shown, the present invention proposes an independent film-coating packaging device for gypsum board production, including a diffuser exhaust assembly 1, a fixed baffle 2, a heated edge sealing assembly 3, a pre-division assembly 4, a gypsum board conveying assembly 5, and a double-layer film-coating assembly 6. The diffuser exhaust assembly 1 is disposed in the heated edge sealing assembly 3, the fixed baffle 2 is disposed on the gypsum board conveying assembly 5, the heated edge sealing assembly 3 is slidably disposed on the fixed baffle 2, the pre-division assembly 4 is disposed on the outside of the heated edge sealing assembly 3, and the double-layer film-coating assembly 6 is disposed on the gypsum board conveying assembly 5. The diffuser exhaust assembly 1 includes a limiting slide plate 11 and an air jet pipe 12. Vertical slide grooves 111 are arranged in an array on the limiting slide plate 11. The top height of each vertical slide groove 111 is the same, and the length of the vertical slide groove 111 decreases from the middle to both sides. The air jet pipe 12 is slidably disposed in the vertical slide groove 111.

[0034] The compressed air, which is at a pressure greater than atmospheric pressure, ejected through the jet pipe 12 can make the upper film 62 adhere tightly to the upper surface of the gypsum board, thereby achieving the purpose of expelling excess air between the lower film 61 and the upper film 62 before sealing the edges.

[0035] The V-shaped arrangement of the jet pipes 12 enables the gradual discharge of air from the middle to both sides during the descent of the frame sealing device 31.

[0036] A compression spring can be optionally installed between the top of the vertical slide 111 and the jet pipe 12, or the jet pipe 12 can be positioned at the bottom of the vertical slide 111 by weight alone.

[0037] The diffuser exhaust assembly 1 also includes a fixed valve plate 13 and a sliding valve plate 14. The fixed valve plate 13 is located at the air inlet end of the jet pipe 12 and has a fixed air inlet hole 131. The sliding valve plate 14 is slidably located inside the fixed valve plate 13 and has a sliding air inlet hole 141 that matches the fixed air inlet hole 131. The air inlet end of the jet pipe 12 is connected to an external air source through a pipe.

[0038] By controlling the jet sequence of the jet pipe 12, not only can the amount of compressed gas used be saved and costs reduced, but the airflow direction between the lower membrane 61 and the upper membrane 62 can also be controlled by the jet sequence.

[0039] The fixed stop bar 2 is provided with a crossbar 21, which is located below the sliding valve plate 14. When the sliding valve plate 14 abuts against the crossbar 21, the jet pipe 12 continues to descend, causing the sliding valve plate 14 to retract toward the jet pipe 12, thereby causing the fixed air inlet 131 and the sliding air inlet 141 to overlap.

[0040] By limiting the sliding valve plate 14 with the crossbar 21 and combining the distribution design of the vertical slide groove 111, automatic control of the opening sequence of the jet pipe 12 can be achieved.

[0041] The heated edge sealing assembly 3 includes a frame-type edge sealing device 31, and the pre-partitioning assembly 4 includes a pre-partitioning pressure plate 41, a spring mounting plate 42, and a pre-tensioning spring 43. The pre-partitioning pressure plate 41 is engaged and slidably disposed on the outside of the frame-type edge sealing device 31, the spring mounting plate 42 is fixedly connected to the outside of the frame-type edge sealing device 31, and the pre-tensioning spring 43 is disposed between the pre-partitioning pressure plate 41 and the spring mounting plate 42.

[0042] The pre-partition pressure plate 41 can press against the partition pad 44 before the jet pipe 12 is opened, so that the lower film 61 and the upper film 62 form a channel that is open to the outside on both sides under the frame sealing device 31. On the one hand, it can prevent the gas ejected from the jet pipe 12 from affecting the lower film 61 and the upper film 62 in other positions. On the other hand, it can match the gas ejected from the jet pipe 12, and stably and controllably realize the discharge of gas between the lower film 61 and the upper film 62.

[0043] The heated edge sealing assembly 3 also includes a guide rod support 32, a lifting guide rod 33, and a crossbeam 34. The guide rod support 32 is fixed to the side of the frame-type edge sealing device 31, and the lifting guide rod 33 is fixed between the guide rod supports 32. The fixed stop bar 2 is also provided with a guide frame 22, and the lifting guide rod 33 is slidably disposed in the guide frame 22.

[0044] The gypsum board conveying assembly 5 includes a roller support 51 and conveying rollers 52. The conveying rollers 52 are arranged in an array on the roller support 51, and the fixed stop bar 2 is arranged on the roller support 51.

[0045] The pre-segmentation component 4 also includes a partitioning pad 44, which is disposed between the roller supports 51 and located directly below the pre-segmentation pressure plate 41.

[0046] The double-layer coating assembly 6 includes a lower film 61 and an upper film 62. The lower film 61 is located below the gypsum board, and the upper film 62 is located above the gypsum board. The roller support 51 is provided with a clearance groove 511 for guiding the lower film 61.

[0047] Since the lower film 61 is simultaneously held against the gypsum board and the conveying roller 52, the adjacent conveying roller 52 can tension the lower film 61, resulting in a good adhesion to the surface of the gypsum board. Therefore, it is possible to determine whether to install a symmetrical diffuser exhaust assembly 1 below the gypsum board as needed.

[0048] The double-layer coating assembly 6 also includes a pressure roller support 63 and an upper pressure roller 64. The pressure roller support 63 is mounted on the roller support 51, and the upper pressure roller 64 is rotatably mounted on the pressure roller support 63. The upper film 62 and the upper pressure roller 64 are in rolling contact.

[0049] like Figure 11 As shown, the dashed arrow indicates the nozzle orientation of the jet pipe 12, the square in the middle represents the plasterboard, the jet pipes 12 arranged in a V-shape are arranged above the plasterboard, and whether a symmetrical diffuser exhaust assembly 1 needs to be set below the plasterboard can be determined according to the actual situation. The diffuser exhaust assemblies 1 on the upper and lower sides have the same movement steps but opposite directions. Springs need to be set between the vertical slide groove 111 and the jet pipe 12 below, as well as between the sliding valve plate 14 and the jet pipe 12. Taking the air jet pipe 12 above the plasterboard as an example: during the descent of the limiting slide plate 11, the sliding valve plate 14 in the middle position contacts the crossbar 21 first, so the air jet pipe 12 in the middle position opens first, thereby pushing the target air in the central area to both sides; then the air jet pipes 12 on both sides open in sequence, pushing the target air further to the side; until all the air jet pipes 12 are opened and the target air is basically discharged, the lower film 61 and the upper film 62 can be heated and pressed together by the frame sealing device 31.

[0050] In practical use, the gypsum board is conveyed in one direction by the movement of the conveying roller 52. The specific cycle is that after conveying one unit distance, the conveying roller 52 stops for a period of time. During the period when the conveying roller 52 stops, the lower film 61 and the upper film 62 are vented and sealed. After sealing once, the movement of the gypsum board can carry the lower film 61 and the upper film 62 at the same time. Therefore, the rolled lower film 61 and upper film 62 can be placed on a non-powered rotating shaft, which can be released when stretched.

[0051] After the gypsum board moves to the bottom of the frame-type edge sealing device 31, the lower film 61 and the upper film 62 can be heated and sealed by the descent of the frame-type edge sealing device 31. Since the edge sealing in the front of the gypsum board in the direction of movement has been completed in the previous process, the frame-type edge sealing device 31 only needs to have the edge sealing function of three sides.

[0052] The frame-type edge sealing device 31 descends along the guide frame 22 under the action of the external telescopic push rod. First, the pre-partitioning pressure plate 41 will press against the partitioning pad 44, sandwiching the lower film 61 and the upper film 62 between the pre-partitioning pressure plate 41 and the partitioning pad 44, changing the area where the gypsum board is located from being open to the outside on three sides to being open to the outside on two sides, thus completing the pre-partitioning.

[0053] Subsequently, the frame sealing device 31 continues to descend. The jet pipe 12, located in the middle position, is at its lowest height. The sliding valve plate 14 on it will first contact the crossbar 21 and retract into the jet pipe 12 under the limit of the crossbar 21. In the free state, the sliding valve plate 14 extends out of the jet pipe 12, and the sliding air inlet 141 and the fixed air inlet 131 do not overlap. At this time, the jet pipe 12 is in the closed state. When the sliding valve plate 14 retracts into the jet pipe 12, the fixed air inlet 131 and the sliding air inlet 141 overlap, the jet pipe 12 opens, and gas is sprayed downwards. The gas ejected from the jet pipe 12 located above the plasterboard will push the upper film 62 to adhere tightly to the upper surface of the plasterboard, and the gas ejected from the jet pipe 12 located below the plasterboard will push the lower film 61 to adhere tightly to the lower surface of the plasterboard, thereby squeezing the air between the lower film 61 and the upper film 62 toward both sides of the plasterboard.

[0054] Since the jet pipe 12 opens sequentially from the middle to both sides, the gas between the lower membrane 61 and the upper membrane 62 will be gradually squeezed from the middle to both sides until it is discharged from both sides.

[0055] Subsequently, the frame-type edge sealing device 31 continues to descend. When the frame-type edge sealing device 31 abuts against the partition pad 44 and the roller bracket 51, it can heat and fuse the lower film 61 and the upper film 62 to complete the edge sealing of the gypsum board. After the frame-type edge sealing device 31 completes the edge sealing, it can also simultaneously complete the cutting step.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An independent film-coating packaging device for gypsum board production, characterized in that: The assembly includes a diffuser exhaust assembly (1), a fixed baffle (2), a heated edge sealing assembly (3), a pre-division assembly (4), a gypsum board conveying assembly (5), and a double-layer film-coating assembly (6). The diffuser exhaust assembly (1) is located in the heated edge sealing assembly (3), the fixed baffle (2) is located on the gypsum board conveying assembly (5), the heated edge sealing assembly (3) is slidably located on the fixed baffle (2), the pre-division assembly (4) is located on the outside of the heated edge sealing assembly (3), and the double-layer film-coating assembly (6) is located on the gypsum board conveying assembly (5). The diffuser exhaust assembly (1) includes a limiting slide plate (11) and an air jet pipe (12). The limiting slide plate (11) is provided with an array of vertical slide grooves (111). The top height of each vertical slide groove (111) is the same, and the length of the vertical slide groove (111) decreases from the middle to both sides. The air jet pipe (12) is slidably disposed in the vertical slide groove (111). The diffuser exhaust assembly (1) further includes a fixed valve plate (13) and a sliding valve plate (14). The fixed valve plate (13) is located at the air inlet end of the jet pipe (12). The fixed valve plate (13) is provided with a fixed air inlet hole (131). The sliding valve plate (14) is slidably located inside the fixed valve plate (13). The sliding valve plate (14) is provided with a sliding air inlet hole (141) that matches the fixed air inlet hole (131). The air inlet end of the jet pipe (12) is connected to an external air source through a pipe. The fixed stop bar (2) is provided with a crossbar (21), which is located below the sliding valve plate (14). When the sliding valve plate (14) abuts against the crossbar (21), the jet pipe (12) continues to descend, causing the sliding valve plate (14) to retract toward the jet pipe (12), thereby causing the fixed air inlet (131) and the sliding air inlet (141) to overlap.

2. The independent film-coating packaging device for gypsum board production according to claim 1, characterized in that: The heated edge sealing assembly (3) includes a frame-type edge sealing device (31), and the pre-partition assembly (4) includes a pre-partition pressure plate (41), a spring mounting plate (42), and a pre-tightening spring (43). The pre-partition pressure plate (41) is engaged and slidably disposed on the outside of the frame-type edge sealing device (31), the spring mounting plate (42) is fixedly connected to the outside of the frame-type edge sealing device (31), and the pre-tightening spring (43) is disposed between the pre-partition pressure plate (41) and the spring mounting plate (42).

3. The independent film-coating packaging device for gypsum board production according to claim 2, characterized in that: The heated edge sealing assembly (3) also includes a guide rod support (32), a lifting guide rod (33) and a crossbeam (34). The guide rod support (32) is fixed to the side of the frame edge sealing device (31). The lifting guide rod (33) is fixed between the guide rod supports (32). The fixed stop bar (2) is also provided with a guide frame (22). The lifting guide rod (33) is slidably disposed in the guide frame (22).

4. The independent film-coating packaging device for gypsum board production according to claim 3, characterized in that: The gypsum board conveying assembly (5) includes a roller bracket (51) and conveying rollers (52), the conveying rollers (52) are arranged in an array on the roller bracket (51), and the fixed stop bar (2) is arranged on the roller bracket (51).

5. The independent film-coating packaging device for gypsum board production according to claim 4, characterized in that: The pre-partitioning component (4) also includes partitioning pads (44), which are disposed between the roller supports (51) and are located directly below the pre-partitioning pressure plate (41).

6. The independent film-coating packaging device for gypsum board production according to claim 5, characterized in that: The double-layer coating assembly (6) includes a lower film (61) and an upper film (62). The lower film (61) is located below the gypsum board, and the upper film (62) is located above the gypsum board. The roller support (51) is provided with a clearance groove (511) for guiding the lower film (61).

7. The independent film-coating packaging device for gypsum board production according to claim 6, characterized in that: The double-layer coating assembly (6) further includes a pressure roller bracket (63) and an upper pressure roller (64). The pressure roller bracket (63) is mounted on a roller bracket (51), and the upper pressure roller (64) is rotatably mounted on the pressure roller bracket (63). The upper film (62) and the upper pressure roller (64) are in rolling contact.

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