A convenient external film replacing, uncovering and covering device

Abstract

The application discloses a kind of external convenient film changing, film uncovering and film coating devices of film coating equipment technical field, including film coating host, film coating host includes film coating host frame, film coating platform is set on film coating host frame, the middle part position of film coating platform is set to the docking station of upper and lower film coating, film coating platform is integrally provided with the sliding passage of broken type in the middle part of docking station, lower die roller is located at the bottom of film coating platform, film coating material on lower die roller is introduced into docking station by sliding passage upward, upper die roller and the lower die roller are integrally rotatably installed on film in and out frame, and the film in and out frame is inserted into the film coating host frame by the lateral sliding insertion of the side of the sliding passage;The application does not need to carry out film changing and film docking operation in the gap of various components of film coating host frame, greatly reduces operation difficulty and labor intensity, improves the speed and efficiency of material replacement downtime, so as to improve the production efficiency of overall equipment.

Description

Technical Field

[0001] This invention relates to the field of film coating equipment technology, specifically to an external, convenient film replacement and film removal coating device. Background Technology

[0002] Existing laminating devices all have the upper and lower molds in fixed positions on the main unit, requiring the film to be installed on the top and bottom of the corresponding positions on the main unit, which is extremely inconvenient and inefficient.

[0003] When using a conventional laminating machine, there are practical problems such as difficulty in changing and connecting the film when replacing the auxiliary film for lamination, and the need to operate inside the equipment, which leads to inconsistencies in operation, low efficiency, and safety issues.

[0004] Conventional laminating equipment uses relatively light and small-sized auxiliary films, making operation relatively easy and the amount used is not large; one roll of film can last for one or several days. However, when using large-sized films, the thickness, length, and pattern specifications of the sheet laminating equipment are different, requiring frequent film replacement and splicing. The operation may need to be carried out more than ten times a day, which makes the problem of inconvenience very prominent and urgently needs to be solved.

[0005] Based on this, the present invention designs an external convenient film replacement, peeling and coating device to solve the practical problems of the above-mentioned coating host, such as difficulty in replacing and connecting the film when changing the auxiliary film for film application, and the need to operate inside the equipment, which is inconvenient, inefficient and unsafe. Summary of the Invention

[0006] The purpose of this invention is to provide an external, convenient film replacement, film removal, and film application device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an external convenient film replacement, film peeling and film covering device, including a film covering host, wherein the film covering host is provided with a docking station for connecting the upper and lower films;

[0008] The coating host includes a coating host frame, on which a coating platform is mounted. The front and rear sides of the coating platform have inlet and outlet ports for the material to be coated. Adjacent to the inlet and outlet ports are auxiliary roller assemblies for assisting in pressing the material to be coated. An upper die roller and a lower die roller are respectively mounted on the upper and lower sides of the coating platform. The middle position of the coating platform is designated as the docking station for upper and lower film coating. The upper die roller and the lower die roller are located on the upper and lower sides of the docking station, respectively. The auxiliary roller assemblies are located on the front and rear sides of the docking station. The coating platform has a segmented sliding channel in the middle of the docking station. The lower die roller is located at the bottom of the coating platform. The coating material on the lower die roller is introduced upwards into the docking station through the sliding channel. Both the upper die roller and the lower die roller are rotatably mounted on an inlet / outlet film frame. The inlet / outlet film frame is laterally slidably inserted into the coating host frame from one side of the sliding channel.

[0009] As a further invention of the present invention: the inlet and outlet film frame includes an upper mold frame for rotatably mounting an upper mold roller and a lower film frame for rotatably mounting a lower mold roller. The upper mold frame and the lower film frame are parallel to each other and horizontally arranged. The middle positions of the left and right sides of the upper mold frame and the lower film frame are fixedly connected by two vertically arranged support frames. A guide roller is rotatably mounted between the two support frames. The support frames are opposite to the sliding channel. The upper mold frame and the lower film frame are respectively provided with guide rail sliding mechanisms corresponding to the film coating main frame.

[0010] As a further invention of the present invention: the guide rail sliding mechanism includes a guide rail frame, which is disposed on the right side of the coating main frame. The top and bottom of the guide rail frame are both equipped with guide rails extending to the left side of the coating main frame. Multiple upper guide wheels are respectively installed on the front and rear side walls of the upper mold frame. The multiple upper guide wheels slide against the inner wall side of the guide rail above the guide rail frame. Multiple lower guide wheels are respectively installed on the bottom of the lower mold frame. The lower guide wheels slide and are engaged with the top of the guide rail below the guide rail frame. A guide wheel motor for driving the rotation of one side of the lower guide wheel is installed on the bottom of the lower mold frame. A drag chain groove is provided on the bottom of the upper mold frame.

[0011] As a further invention: the inlet / outlet film frame is equipped with an adjustable shaft frame assembly for mounting the material roller. The adjustable shaft frame assembly includes two sets of damping friction plates arranged opposite each other and a V-shaped shaft plate. The V-shaped shaft plate has an adjustable screw hole for tightening the damping friction plates. The V-shaped shaft plate is vertically fixedly mounted on a movable slide. The movable slide is laterally slidably engaged on a movable base. The movable base is fixedly mounted on the inlet / outlet film frame. The top of the movable base has a slot, and a lead screw is rotatably mounted in the slot. A slider is threaded onto the lead screw. The top of the slider is fixedly connected to the movable slide. An adjusting screw for driving the lead screw to rotate is provided on the outer wall of the movable base.

[0012] As a further invention of the present invention: the movable slide is slidably nested in the outer ring of the top layer of the movable base, and the outer wall of the movable slide is threaded with a plurality of side fastening bolts for limiting the position of the movable slide.

[0013] As a further invention of the present invention: a limiting mechanism for ensuring lateral movement is provided between the film coating main frame and the inlet / outlet film frame. The limiting mechanism includes a guide rail limiting frame installed on the bottom left side of the film coating main frame and an auxiliary frame fixedly installed on the right side of the inlet / outlet film frame. When the inlet / outlet film frame is inserted into the film coating main frame by sliding laterally along the sliding channel, the left side wall of the inlet / outlet film frame abuts against the guide rail limiting frame, and the auxiliary frame abuts against the right side wall of the film coating main frame.

[0014] As a further invention of the present invention: the bottom of the laminating main frame is provided with a pressing mechanism for pressing against the in-and-out film frame. The pressing mechanism includes a pressing cylinder. The bottom of the pressing cylinder is rotatably mounted on the front and rear sides of the bottom of the laminating main frame via a cylinder rotating seat. An upper connecting plate is rotatably mounted on the telescopic end of the pressing cylinder. A connecting rod is obliquely fixed on the inner end of the upper connecting plate. A pressing frame for pressing against the in-and-out film frame is fixed at the bottom of the rear end of the connecting rod. The bottom of the connecting rod is rotatably mounted on a connecting rotating frame. The connecting rotating frame is fixed on the laminating main frame at the inner position of the cylinder rotating seat.

[0015] As a further invention of the present invention: the bottom of the laminating main frame is provided with a pressing mechanism for pressing against the in-and-out film frame. The pressing mechanism includes a pressing cylinder. The bottom of the pressing cylinder is rotatably mounted on the front and rear sides of the bottom of the laminating main frame via a cylinder rotating seat. An upper connecting plate is rotatably mounted on the telescopic end of the pressing cylinder. A connecting rod is obliquely fixed on the inner end of the upper connecting plate. A pressing frame for pressing against the in-and-out film frame is fixed at the bottom of the rear end of the connecting rod. The bottom of the connecting rod is rotatably mounted on a connecting rotating frame. The connecting rotating frame is fixed on the laminating main frame at the inner position of the cylinder rotating seat.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. During the lamination process of this invention: the laminating host and the film loading / unloading frame are combined into the working state, which can be connected to the board conveying device to realize automatic continuous single-sided / double-sided lamination and film cutting; when changing or connecting film: the film frame is withdrawn from the laminating host, so that the film frame is in an open work position. At this time, the upper film and lower mold can be hoisted and placed into the clamping position. Then, the upper film starting position and the lower film starting position are operated to realize quick docking and bonding. After completion, the film frame is automatically reset to the working position and merged with the laminating host to work together. This greatly improves the convenience of operation. There is no need to change or connect film in the gaps between various components of the laminating host frame. This greatly reduces the difficulty of operation and labor intensity, and improves the speed and efficiency of material change and shutdown for material replacement, thereby improving the overall production efficiency of the equipment.

[0018] 2. The adjustable shaft frame assembly of this invention allows for flexible loading and unloading of different material rollers, and can adapt to various material rollers with different shaft diameters and lengths, thus providing greater adaptability.

[0019] 3. The limiting mechanism set in this invention is used to ensure that the in-and-out film frame moves laterally to a certain position on the laminating main frame, thus ensuring the accuracy of docking during operation;

[0020] 4. The pressing mechanism provided in this invention limits the position of the film frame to ensure that there is no shaking or displacement when the film frame is working with the film coating host frame. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 A schematic diagram of the structure for moving the membrane frame out of the coating platform;

[0023] Figure 3 A schematic diagram of the structure of the film loading and unloading frame located separately within the laminating main unit frame;

[0024] Figure 4 This is a schematic diagram of the structure for entering and exiting the mold frame;

[0025] Figure 5 for Figure 3 The bottom horizontal view;

[0026] Figure 6 This is a schematic diagram of the laminating main frame after the inlet and outlet mold frames have been removed.

[0027] Figure 7 This is a structural diagram showing the location of the coating platform;

[0028] Figure 8 for Figure 4 A magnified view of a section at point A in the middle;

[0029] Figure 9 for Figure 6 A magnified view of a section at point B.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] The components include: a laminating main frame 1, an upper mold roller 10, a lower mold roller 11, a laminating platform 12, a sliding channel 13, a guide rail frame 14, a guide rail 15, an inlet / outlet port 16, an auxiliary roller assembly 17, a guide rail limit frame 18, an inlet / outlet film frame 2, an upper mold frame 20, a lower film frame 21, a support frame 22, a guide roller 23, a lower guide wheel 24, an upper guide wheel 25, a guide wheel motor 26, a drag chain trough 27, an auxiliary frame 28, a damping friction plate 3, a V-shaped shaft plate 30, a damping cylinder 31, a movable slide 32, a movable base 33, an adjusting screw 34, a side fastening bolt 35, a clamping cylinder 4, a cylinder rotating seat 40, an upper connecting plate 41, a connecting rod 42, a clamping frame 43, and a connecting rotating frame 44. Detailed Implementation

[0032] Please see Figure 1-9 The present invention provides a technical solution: an external convenient film replacement, film peeling and film covering device, including a film covering host, wherein the film covering host is provided with a docking station for connecting the upper and lower films;

[0033] The coating machine includes a coating machine frame 1, on which a coating platform 12 is mounted. The coating platform 12 has inlet / outlet ports 16 on its front and rear sides for the material to be coated. Auxiliary roller assemblies 17 for assisting in pressing the material to be coated are located adjacent to the inlet / outlet ports 16. An upper die roller 10 and a lower die roller 11 are respectively mounted on the upper and lower sides of the coating platform 12. The middle position of the coating platform 12 is set as the docking station for upper and lower film coating. The upper die roller 10 and the lower die roller 11 are respectively located at the docking station. The auxiliary roller assembly 17 is set on the front and rear sides of the docking station on the upper and lower sides of the workstation; the film coating platform 12 is provided with a segmented sliding channel 13 in the middle of the docking station; the lower mold roller 11 is located at the bottom of the film coating platform 12; the film coating material on the lower mold roller 11 is introduced upward into the docking station through the sliding channel 13; the upper mold roller 10 and the lower mold roller 11 are rotatably mounted on the film inlet and outlet frame 2; the film inlet and outlet frame 2 is laterally slidably inserted into the film coating main frame 1 from one side of the sliding channel 13;

[0034] During operation, the inlet / outlet film holder 2 and the coating host frame 1 constitute the entire coating host. Under normal operation, the material to be coated enters and exits longitudinally through the inlet / outlet 16 of the coating platform 12. The auxiliary roller assembly 17 mainly provides guiding conveying and coating rolling operations. After the upper and lower films at the upper die roller 10 and lower die roller 11 are joined, the material to be coated can be laminated at the joining station. When the material at the upper die roller 10 and lower die roller 11 is used up and needs to be replaced, traditional operation requires pulling the starting ends of the upper die roller 10 and lower die roller 11 to the joining station for joining. This application directly and completely changes the coating platform 12... The structural design and the arrangement of the upper and lower mold rollers 10 and 11 allow for direct reconnection of the upper and lower mold rollers 10 and 11 when they need to be reconnected. The inlet / outlet film holder 2 is simply pulled laterally from the sliding channel 13 of the film coating platform 12. This allows the upper and lower mold rollers 10 and 11 to be directly separated from the film coating main frame 1, enabling film connection in the external space. This significantly improves operational convenience, eliminating the need to perform film replacement and connection operations within the gaps between various components of the film coating main frame 1. This greatly reduces operational difficulty and labor intensity, increases the speed and efficiency of material replacement and shutdown, and ultimately improves the overall production efficiency of the equipment.

[0035] The inlet / outlet film frame 2 includes an upper mold frame 20 for rotatably mounting the upper mold roller 10 and a lower film frame 21 for rotatably mounting the lower mold roller 11. The upper mold frame 20 and the lower film frame 21 are parallel to each other and horizontally arranged. The middle positions of the left and right sides of the upper mold frame 20 and the lower film frame 21 are fixedly connected by two vertically arranged support frames 22. A guide roller 23 is rotatably mounted between the two support frames 22. The support frames 22 are opposite to the sliding channel 13. The upper mold frame 20 and the lower film frame 21 are respectively provided with guide rail sliding mechanisms corresponding to the film coating main frame 1.

[0036] During operation, the inlet / outlet film holder 2, through the structure of the upper mold frame 20, lower mold frame 21, support frame 22 and guide roller 23, ensures the installation and working status of the upper mold roller 10 and lower mold roller 11, while also ensuring that the inlet / outlet film holder 2 can be smoothly inserted into the coating host frame 1 along the sliding channel 13 and merge with the coating host frame 1 to form the whole of the coating host. The set guide rail sliding mechanism mainly facilitates the smoother and more stable lateral movement of the inlet / outlet film holder 2.

[0037] The guide rail sliding mechanism includes a guide rail frame 14, which is located on the right side of the laminating main frame 1. The top and bottom of the guide rail frame 14 are equipped with guide rails 15 extending to the left side of the laminating main frame 1. The front and rear side walls of the upper mold frame 20 are respectively equipped with multiple upper guide wheels 25, which slide against the inner wall of the guide rail 15 above the guide rail frame 14. The bottom of the lower mold frame 21 is equipped with multiple lower guide wheels 24, which slide and engage with the top of the guide rail 15 below the guide rail frame 14. The bottom of the lower mold frame 21 is equipped with a guide wheel motor 26 for driving the rotation of one side of the lower guide wheel 24. The bottom of the upper mold frame 20 is provided with a drag chain groove 27.

[0038] During operation, the lower mold frame 21 slides and engages with the guide rail 15 at the bottom of the guide rail frame 14 via the lower guide wheel 24, providing stable support and guidance. Therefore, the top of the upper mold frame 20 only needs to cooperate in limiting lateral movement. Thus, the upper mold frame 20 is provided with lateral upper guide wheels 25 at the front and rear to cooperate with the guide rail 15 at the top. The guide wheel motor 26 can drive the lower guide wheel 24 to rotate automatically, thereby facilitating automatic control of the film frame 2 to move out or push in. The cable tray 27 facilitates the routing of the guide wheel motor 26 or other control lines and power lines.

[0039] The inlet / outlet film frame 2 is equipped with an adjustable shaft frame assembly for mounting the material roller. The adjustable shaft frame assembly includes two sets of damping friction plates 3 and V-shaped shaft plates 30 arranged opposite each other. The damping friction plates 3 and V-shaped shaft plates 30 are provided with shaft holes at the top and bottom for forming support. A damping cylinder 31 for driving the damping friction plates 3 to slide vertically is fixedly installed on the V-shaped shaft plate 30. The V-shaped shaft plate 30 is vertically fixedly installed on the movable slide block 32. The movable slide block 32 is laterally slidably locked on the movable base 33. The movable base 33 is fixedly installed on the inlet / outlet film frame 2. The top of the movable base 33 has a slot, and a lead screw is rotatably installed in the slot. A slider is threaded on the lead screw. The top of the slider is fixedly connected to the movable slide block 32. An adjusting screw 34 for driving the lead screw to rotate is provided on the outer wall of the movable base 33.

[0040] The movable slide block 32 is slidably nested in the outer ring of the top layer of the movable base 33, and the outer wall of the movable slide block 32 is threaded with a plurality of side fastening bolts 35 for limiting the position of the movable slide block 32.

[0041] At work, such as Figure 8As shown, the damping friction plate 3 and the V-shaped shaft plate 30 form a shaft hole that restricts the roller shaft. By adjusting the damping cylinder 31, the distance between the damping friction plate 3 is driven, thereby adjusting the shaft hole size and the friction force on the roller shaft, thus controlling the tension of the film tensioning wheel, better controlling the planar adhesion of the film, and eliminating film defects such as bubbles and ripples. The rotating adjusting screw 34 can drive the moving slide 32 to slide laterally on the moving base 33 through the screw structure, thereby changing the distance between the two sets of V-shaped shaft plates 30, thus adapting to rollers of different lengths. The side fastening bolts 35 are mainly used to assist in adjusting the lateral distance. Therefore, the adjustable shaft frame assembly of this invention can flexibly pick up and put in different rollers, and can adapt to various rollers with different shaft diameters and lengths, making it more adaptable.

[0042] The film coating main frame 1 and the film inlet / outlet frame 2 are provided with a limiting mechanism to ensure lateral movement. The limiting mechanism includes a guide rail limiting frame 18 installed on the bottom left side of the film coating main frame 1 and an auxiliary frame 28 fixedly installed on the right side of the film inlet / outlet frame 2. When the film inlet / outlet frame 2 is inserted into the film coating main frame 1 by sliding along the sliding channel 13, the left side wall of the film inlet / outlet frame 2 abuts against the guide rail limiting frame 18, and the auxiliary frame 28 abuts against the right side wall of the film coating main frame 1.

[0043] During operation, the limiting mechanism is mainly used to ensure that the in-and-out film holder 2 moves laterally to a certain position on the film coating host frame 1, thus ensuring the accuracy of docking during operation.

[0044] The bottom of the film-coating main frame 1 is provided with a pressing mechanism for pressing against the in-and-out film frame 2. The pressing mechanism includes a pressing cylinder 4. The bottom of the pressing cylinder 4 is rotatably mounted on the front and rear sides of the bottom of the film-coating main frame 1 via a cylinder rotating seat 40. An upper connecting plate 41 is rotatably mounted on the telescopic end of the pressing cylinder 4. A connecting rod 42 is obliquely fixed on the inner end of the upper connecting plate 41. A pressing frame 43 for pressing against the in-and-out film frame 2 is fixed at the bottom of the rear end of the connecting rod 42. The bottom of the connecting rod 42 is rotatably mounted on a connecting rotating frame 44. The connecting rotating frame 44 is fixed on the film-coating main frame 1 at the inner position of the cylinder rotating seat 40.

[0045] At work, such as Figure 9 As shown, when the in-and-out film holder 2 is horizontally inserted into the laminating main frame 1, in order to prevent the in-and-out film holder 2 from shaking, the pressing cylinder 4 is driven to move. The pressing cylinder 4 drives the upper connecting plate 41 upward, and the upper connecting plate 41 drives the pressing frame 43 downward through the connecting rod 42 to press it down, thereby limiting the position of the in-and-out film holder 2 and ensuring that the in-and-out film holder 2 will not shake or deviate when working with the laminating main frame 1.

Claims

1. An external, convenient film replacement, peeling, and coating device, comprising a coating host, wherein the coating host is provided with a docking station for connecting upper and lower films, characterized in that: The coating host includes a coating host frame (1), on which a coating platform (12) is provided. The front and rear sides of the coating platform (12) are provided with inlet and outlet ports (16) for the material to be coated. The adjacent sides of the inlet and outlet ports (16) are provided with auxiliary roller assemblies (17) for assisting in pressing the material to be coated. The upper mold roller (10) and the lower mold roller (11) are respectively mounted on the upper and lower sides of the coating platform (12). The middle position of the coating platform (12) is set as the docking station for upper and lower film coating. The upper mold roller (10) and the lower mold roller (11) are respectively located at the docking station. The auxiliary roller assembly (17) is set on the front and rear sides of the docking station on the upper and lower sides of the workstation; the film coating platform (12) is provided with a segmented sliding channel (13) in the middle of the docking station; the lower mold roller (11) is located at the bottom of the film coating platform (12); the film coating material on the lower mold roller (11) is introduced upward into the docking station through the sliding channel (13); the upper mold roller (10) and the lower mold roller (11) are rotatably mounted on the inlet and outlet film frame (2); the inlet and outlet film frame (2) is horizontally slidably inserted into the film coating main frame (1) from one side of the sliding channel (13).

2. The externally mounted, convenient film replacement, peeling, and coating device according to claim 1, characterized in that: The inlet and outlet film frame (2) includes an upper mold frame (20) for rotatably mounting the upper mold roller (10) and a lower film frame (21) for rotatably mounting the lower mold roller (11). The upper mold frame (20) and the lower film frame (21) are parallel to each other and horizontally arranged. The middle positions of the left and right sides of the upper mold frame (20) and the lower film frame (21) are fixedly connected by two vertically arranged support frames (22). A guide roller (23) is rotatably installed between the two support frames (22). The support frames (22) are opposite to the sliding channel (13). The upper mold frame (20) and the lower film frame (21) are respectively provided with guide rail sliding mechanisms corresponding to the film coating host frame (1).

3. The externally mounted, convenient film replacement, peeling, and coating device according to claim 2, characterized in that: The guide rail sliding mechanism includes a guide rail frame (14), which is located on the right side of the coating host frame (1). The top and bottom of the guide rail frame (14) are equipped with guide rails (15) extending to the left side of the coating host frame (1). The front and rear side walls of the upper mold frame (20) are respectively equipped with multiple upper guide wheels (25). The multiple upper guide wheels (25) slide against the inner wall of the guide rail (15) above the guide rail frame (14). The bottom of the lower mold frame (21) is equipped with multiple lower guide wheels (24). The lower guide wheels (24) slide and are locked on the top of the guide rail (15) below the guide rail frame (14). The bottom of the lower mold frame (21) is equipped with a guide wheel motor (26) for driving the lower guide wheel (24) on one side to rotate. The bottom of the upper mold frame (20) is provided with a drag chain groove (27).

4. The externally mounted, convenient film replacement, peeling, and coating device according to claim 2, characterized in that: An adjustable shaft frame assembly for mounting the material roller is installed on the inlet / outlet film frame (2). The adjustable shaft frame assembly includes two sets of damping friction plates (3) arranged opposite each other on the left and right and a V-shaped shaft plate (30). The V-shaped shaft plate (30) has an adjustable screw hole (31) for tightening the damping friction plate (3). The V-shaped shaft plate (30) is vertically fixed on the movable slide (32). The movable slide (32) is horizontally slidably locked on the movable base (33). The movable base (33) is fixedly installed on the inlet / outlet film frame (2). The top of the movable base (33) has a slot. A screw is rotatably installed in the slot. A slider is threaded on the screw. The top of the slider is fixedly connected to the movable slide (32). An adjusting screw (34) for driving the screw to rotate is provided on the outer wall of the movable base (33).

5. An external, convenient film replacement, peeling, and coating device according to claim 4, characterized in that: The movable slide (32) is slidably nested on the outer ring of the top layer of the movable base (33), and the outer wall of the movable slide (32) is threaded with a plurality of side fastening bolts (35) for limiting the position of the movable slide (32).

6. The externally mounted, convenient film replacement, peeling, and coating device according to claim 1, characterized in that: A limiting mechanism is provided between the film coating main frame (1) and the inlet / outlet film frame (2) to ensure the lateral movement position. The limiting mechanism includes a guide rail limiting frame (18) installed on the bottom left side of the film coating main frame (1) and an auxiliary frame (28) fixedly installed on the right side of the inlet / outlet film frame (2). When the inlet / outlet film frame (2) is inserted into the film coating main frame (1) by sliding along the sliding channel (13), the left side wall of the inlet / outlet film frame (2) abuts against the guide rail limiting frame (18), and the auxiliary frame (28) abuts against the right side wall of the film coating main frame (1).

7. The externally mounted, convenient film replacement, peeling, and coating device according to claim 1, characterized in that: The bottom of the coating host frame (1) is provided with a pressing mechanism for pressing against the in-and-out film frame (2). The pressing mechanism includes a pressing cylinder (4). The bottom of the pressing cylinder (4) is rotatably mounted on the front and rear sides of the bottom of the coating host frame (1) via a cylinder swivel (40). An upper connecting plate (41) is rotatably mounted on the telescopic end of the pressing cylinder (4). A connecting rod (42) is obliquely fixed on the inner end of the upper connecting plate (41). A pressing frame (43) for pressing against the in-and-out film frame (2) is fixed at the bottom of the rear end of the connecting rod (42). The bottom of the connecting rod (42) is rotatably mounted on a connecting rotating frame (44). The connecting rotating frame (44) is fixed on the coating host frame (1) at the inner position of the cylinder swivel (40).

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