Protective film pressing device and using method thereof

Abstract

The invention discloses a protective film pressing device and a use method thereof, and belongs to the technical field of protective film processing, the protective film pressing device comprises a cabinet placed above the ground, an unwinding roller is rotatably mounted on the upper surface of the left end of the cabinet, and a winding roller is rotatably mounted on the upper surface of the right end of the cabinet; a fixing frame is fixedly installed on the upper surface of the machine cabinet, a movable plate is arranged above the fixing frame, an air conveying assembly is connected between the fixing frame and the movable plate, a rotating frame is elastically and rotationally connected to the lower portion of the movable plate through a torsional spring, and an obliquely-arranged exhaust roller is rotationally connected to the lower end of the rotating frame. And a heat generation assembly for heating air is arranged on the inner side of the exhaust roller. According to the protective film pressing device and the using method thereof, the exhausting and pressing effects on the protective film can be improved through vibration, gas can be automatically conveyed to heat the protective film in the pressing process, and the exhausting and cleaning effects of the protective film are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of protective film processing, and in particular to a protective film pressing device and a use method thereof. Background Art

[0002] The protective film is a membrane structure used to protect the outer wall of the product. During the production and processing of the protective film, it is necessary to press the adhesive surface of the protective film with a base film for protection before leaving the factory. Therefore, a pressing device is required to achieve the pressing of the two layers of film.

[0003] Prior art 1 (application number: 202322594382.2, Chinese patent with application date of 2023-09-25) discloses a protective film pressing device. By setting a defoaming roller, when the pressed protective film needs to be defoamed, first, the protective film and the base film are pressed on the transmission belt, and there may be small bubbles between the two. At this time, the moving transmission belt drives the protective film to pass under the defoaming roller. Since the gap between the defoaming roller and the transmission belt is small, the gap between the defoaming roller and the transmission belt is adjusted and fixed by the threaded rod and the loose nut. The protective film and the base film passing under the defoaming roller are squeezed to squeeze out the air between them, so as to facilitate the defoaming of the pressed protective film; Prior art 2 (application number: 202011012651.4, Chinese patent with application date of 2020-09-23) discloses a pressing device for the production and processing of protective films, including a workbench, legs, an exhaust unit and an auxiliary heating unit. Element; the legs are fixedly connected to the bottom of the workbench; the exhaust unit is arranged on the top of the workbench, and the auxiliary heating unit is arranged on the workbench on one side of the exhaust unit; the exhaust unit includes a No. 1 bracket, a No. 1 roller and a No. 2 roller; the No. 1 bracket is fixedly connected to the top of the workbench; the No. 1 bracket is rotatably connected to the No. 1 roller and the No. 2 roller; the middle part of the workbench is rotatably connected to an elastic flattening roller through the No. 2 bracket; the workbench between the flattening roller and the No. 1 bracket is rotatably connected to a guide roller through a support; a groove is provided on the workbench at a position corresponding to the flattening roller, and a support roller is rotatably connected in the groove; the protective film and the bottom film are squeezed by the elastic flattening roller in cooperation with the support roller, so as to increase the discharge efficiency of the bubbles between the protective film and the bottom film, thereby increasing the production quality of the protective film; during use, the existing protective film pressing device can realize defoaming treatment by rolling, but the rolling force of the roller is limited, and the bubbles cannot be fully squeezed and discharged, and simply increasing the force will cause the film body to deform and rupture, so there are certain defects in use. Summary of the invention

[0004] The purpose of the present invention is to provide a protective film pressing device and a method of using the same, so as to solve the problem raised by the above background technology that the rolling force of the protective film pressing device on the market is limited and the bubbles cannot be fully squeezed out, while simply increasing the force will cause the film to deform and rupture.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective film laminating device, comprising a cabinet placed above the ground, a reeling roller is rotatably mounted on the upper surface of the left end of the cabinet, and a reeling roller is rotatably mounted on the upper surface of the right end of the cabinet, and an arched bracket is fixedly mounted on the middle position of the upper surface of the reeling roller; guide rollers are symmetrically arranged on both sides of the bracket, and the guide rollers are rotatably mounted on the upper surface of the cabinet, a laminating component for laminating the protective film is arranged on the bracket, and a second motor is fixedly mounted on the upper surface of the bracket, and the output end of the second motor is fixed A cam is installed; a fixed frame is fixedly installed on the upper surface of the cabinet, and a movable plate is arranged above the fixed frame, and an air delivery component is connected between the fixed frame and the movable plate, and an air collecting pipe is fixedly installed on the upper surface of the movable plate, and the air outlet end of the air delivery component is communicated with the air collecting pipe, a rotating frame is elastically rotatably connected to the lower side of the movable plate through a torsion spring, and an inclined exhaust roller is rotatably connected to the lower end of the rotating frame, and a heat generating component for heating the air is arranged on the inner side of the exhaust roller, a cleaning pipe is elastically rotatably installed on the left side of the bracket, and nozzles are evenly connected to the cleaning pipe.

[0006] Preferably, the pressing assembly includes a first motor fixedly mounted on the upper surface of the bracket, and a threaded rod is fixedly mounted on the output end of the first motor, and the lower end of the threaded rod passes through the upper end of the bracket and is threadedly connected to a movable frame, and the movable frame slides against the side wall of the bracket, and a pressing roller is rotatably mounted on the inner side of the movable frame.

[0007] Preferably, a supporting roller is rotatably installed on the inner side of the bracket, and the laminating roller moves downward to cooperate with the supporting roller to extrude the protective film, and the laminating roller and the supporting roller press the protective film during the conveyance of the protective film.

[0008] Preferably, the movable plate forms an elastic lifting structure through the air delivery assembly and the fixed frame, and the second motor drives the cam to rotate to push the movable plate downward.

[0009] Preferably, the gas delivery assembly includes a guide column fixedly mounted on the upper surface of the fixing frame, and a sealing plug is fixedly mounted on the upper end of the guide column, and a gas cylinder is evenly fixedly mounted on the lower surface of the movable plate, and the sealing plug is slidably connected with the inner side of the gas cylinder by interference fit, the upper end of the gas cylinder is respectively connected with an air intake pipe and an exhaust pipe, and both the air intake pipe and the exhaust pipe are provided with a one-way valve structure, and the exhaust pipe is connected with the gas collecting pipe, and a first spring is connected between the fixing frame and the lower end of the gas cylinder.

[0010] Preferably, a top column is fixedly installed on the top of the sealing plug, and a sealing block is connected to the inner upper end of the gas cylinder through a second spring, and the sealing block is fitted to the inner wall of the upper end of the gas cylinder to seal the lower end of the exhaust pipe. At the same time, the lower surface of the sealing block is arranged in an inclined surface, and during the upward movement of the sealing plug, the top column contacts the inclined surface of the sealing block and pushes the sealing block to move elastically to release the blockage of the lower end of the exhaust pipe. During the upward movement of the sealing plug, the air inside the gas cylinder is compressed.

[0011] Preferably, the rotating frame is arranged in an inclined shape, and the exhaust roller rotatably connected to the lower end of the rotating frame is in contact with the upper surface of the protective film, and the movable plate pushes the rotating frame to rotate during the downward movement, while the exhaust roller rolls in contact with the surface of the protective film.

[0012] Preferably, the heat generating component includes a rotating shaft that passes through and is rotatably installed on the lower end of the rotating frame, and the rotating shaft passes through the exhaust roller, and the exhaust roller and the rotating shaft are coaxially arranged, and the exhaust roller is a hollow structure, and the inner wall of the exhaust roller is evenly provided with a friction plate made of elastic material, and the outer wall of the rotating shaft is evenly fixed with a rotating part with a fan-shaped structure, and the inner side of the rotating part is a hollow structure, and the hollow part of the rotating part is filled with a counterweight ball, and the friction plate is attached to the outer wall of the rotating part, and gear rings are fixedly installed on the inner sides of both ends of the exhaust roller, and a driving gear is fixedly installed on the outer side of the end of the rotating shaft, and a driving gear is meshingly connected with the gear ring and the driving gear, and the driving gear is rotatably installed on the outer side of the lower end of the rotating frame.

[0013] Preferably, the rotating shaft is a hollow structure, and a through hole is opened between the hollow structures of the rotating shaft and the rotating part, and the aperture of the through hole is smaller than the diameter of the counterweight ball, the two ends of the rotating shaft are respectively connected to the gas collecting pipe and the cleaning pipe through pipes, and a pull rope is wound around the outside of the cleaning pipe, and the right end of the pull rope is fixedly connected to the outside of the movable plate.

[0014] A protective film laminating device is disclosed, and a method for using the laminating device is also disclosed. The specific method steps are as follows: S1, unwinding the protective film and the base film through the unwinding roller, passing the protective film and the base film under the guide roller and over the support roller after the protective film and the base film are laminated, and rewinding through the rewinding roller, while controlling the first motor to drive the laminating roller to move downward, and cooperating with the support roller to clamp the protective film; S2, start the winding roller to wind up the protective film, so that the laminating roller and the supporting roller press the protective film, and at the same time start the second motor to drive the cam, so as to push the movable plate to move up and down, thereby driving the exhaust roller to squeeze the pressed protective film to achieve automatic exhaust; S3. With the reciprocating rise and fall of the movable plate, the air cylinder can automatically draw air and compress it to generate heat and then transport it to the air collecting pipe, and then transport it to the hollow structure of the rotating shaft through the pipeline. At the same time, the exhaust roller will drive the rotating shaft and the rotating part to rotate during the rotation, so that the rotating part will produce a centrifugal effect during the rotation, thereby causing the exhaust roller to vibrate during the rolling process, further improving the exhaust effect, and friction will occur during the shaking of the counterweight ball, and the friction plate and the rotating part will rub, thereby heating the air flowing through the rotating shaft, and the heated air will be blown to the outside of the unpressed protective film through the nozzle on the cleaning pipe to achieve preheating and cleaning.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the protective film pressing device and the use method thereof can utilize vibration to improve the exhaust and pressing effects of the protective film, and can automatically supply gas to heat the protective film during the pressing process, further improving the exhaust and cleaning effects of the protective film. The specific contents are as follows: 1. A movable plate and an exhaust roller are provided, and the second motor is controlled to drive the cam to rotate, so that the cam can push the movable plate to perform elastic lifting and lowering adjustment, thereby driving the exhaust roller at the lower end of the rotating frame to roll obliquely against the surface of the protective film during the rotation of the rotating frame, thereby achieving effective exhaust of the protective film after lamination and improving the fit between the protective film and the base film.

[0016] 2. An air cylinder and a sealing block are provided. As the movable plate reciprocates and rises and falls, the guide column drives the sealing plug to perform reciprocating interference sliding adjustment in the air cylinder, so that the air cylinder can inhale filtered air through the air inlet pipe. As the sealing plug moves upward, the air cylinder can compress and generate heat for the air inside. When the top column pushes the sealing block to slide elastically, the compressed air inside the air cylinder will enter the air collecting pipe through the exhaust pipe, and the gas in the air collecting pipe will enter the cleaning pipe through the rotating shaft, and be blown to the outside of the unpressed protective film through the nozzle on the cleaning pipe, so as to fully clean the protective film.

[0017] 3. An exhaust roller, a friction plate, a rotating shaft and a rotating part are provided. As the exhaust roller rolls to exhaust air, the exhaust roller will drive the rotating shaft to rotate through the transmission action of the transmission gear, the gear ring and the drive gear, so that the rotating shaft will rub against the friction plate. As the rotating shaft drives the rotating part to rotate, the weighted ball inside the rotating part will shake and rub, thereby further heating the air, thereby heating and heating the protective film, and improving the pressing and exhaust effect of the protective film.

[0018] 4. A rotating shaft and a rotating part are provided. As the rotating shaft and the rotating part rotate, the rotating part will generate centrifugal force during the rotation process, so that the exhaust roller will vibrate during the rolling process, thereby increasing the force applied to the protective film during the rolling process, and further improving the effective exhaust of the protective film after lamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the installation structure of the lamination roller of the present invention; Figure 4 This is a schematic diagram of the installation structure of the fixing frame and the movable plate of the present invention; Figure 5 This is a schematic diagram of the gas delivery cylinder installation structure of the present invention; Figure 6 This is a schematic diagram of the installation structure of the rotating frame of the present invention; Figure 7 It is a schematic diagram of the top cross-sectional structure of the exhaust roller of the present invention; Figure 8 It is a schematic diagram of the side cross-sectional structure of the exhaust roller of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the gas delivery cylinder of the present invention.

[0020] In the figure: 1, cabinet; 2, unwinding roller; 3, winding roller; 4, bracket; 5, first motor; 6, threaded rod; 7, movable frame; 8, pressing roller; 9, supporting roller; 10, guide roller; 11, second motor; 12, cam; 13, fixed frame; 14, movable plate; 15, guide column; 16, sealing plug; 17, top column; 18, air cylinder; 19, first spring; 20, air inlet pipe; 21, exhaust pipe; 22, sealing block; 23, second spring; 24, air collecting pipe; 25, rotating frame; 26, exhaust roller; 2601, friction plate; 27, rotating shaft; 2701, rotating part; 2702, counterweight ball; 28, transmission gear; 29, gear ring; 30, driving gear; 31, cleaning pipe; 32, pull rope. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1-Figure 7As shown, the existing protective film laminating device is not convenient to efficiently remove the bubbles between the film bodies during the laminating process. In order to solve this technical problem, the present embodiment discloses the following technical contents; a protective film laminating device, comprising a cabinet 1 placed above the ground, a reel 2 is rotatably mounted on the upper surface of the left end of the cabinet 1, and a reel 3 is rotatably mounted on the upper surface of the right end of the cabinet 1, and an arched bracket 4 is fixedly mounted in the middle position of the upper surface of the reel 3; guide rollers 10 are symmetrically arranged on both sides of the bracket 4, and the guide rollers 10 are rotatably mounted on the upper surface of the cabinet 1, a laminating component for laminating the protective film is arranged on the bracket 4, and the bracket 4 is fixedly mounted on the upper surface of the cabinet 1, and a cam 12 is fixedly mounted on the output end of the second motor 11; a fixing frame 13 is fixedly mounted on the upper surface of the cabinet 1, and a movable plate 14 is arranged above the fixing frame 13, and an air delivery component is connected between the fixing frame 13 and the movable plate 14, and an air collecting pipe 24 is fixedly mounted on the upper surface of the movable plate 14, and the air outlet end of the air delivery component is communicated with the air collecting pipe 24, a rotating frame 25 is elastically rotatably connected to the lower side of the movable plate 14 through a torsion spring, and an inclined exhaust roller 26 is rotatably connected to the lower end of the rotating frame 25, and a heat generating component for heating air is arranged on the inner side of the exhaust roller 26.

[0023] The pressing assembly includes a first motor 5 fixedly mounted on the upper surface of the bracket 4, and a threaded rod 6 is fixedly mounted on the output end of the first motor 5, and the lower end of the threaded rod 6 passes through the upper end of the bracket 4 and is threadedly connected to a movable frame 7, and the movable frame 7 slides against the side wall of the bracket 4, and a pressing roller 8 is rotatably mounted on the inner side of the movable frame 7; a supporting roller 9 is rotatably mounted on the inner side of the bracket 4, and the pressing roller 8 cooperates with the supporting roller 9 to squeeze the protective film after moving down, and the pressing roller 8 and the supporting roller 9 press the protective film during the transportation of the protective film; the movable plate 14 forms an elastic lifting structure through the air supply assembly and the fixed frame 13, and the second motor 11 drives the cam 12 to push the movable plate 14 downward during the rotation; the rotating frame 25 is arranged in an inclined shape, and the exhaust roller 26 rotatably connected to the lower end of the rotating frame 25 is in contact with the upper surface of the protective film, and the movable plate 14 pushes the rotating frame 25 to rotate during the downward movement, and the exhaust roller 26 rolls in contact with the surface of the protective film; the heat generating component includes a rotating shaft 27 that passes through and is rotatably installed on the lower end of the rotating frame 25, and the rotating shaft 27 passes through the exhaust roller 26, and the exhaust roller 26 and the rotating shaft 27 are coaxially arranged; gear rings 29 are fixedly installed on the inner sides of both ends of the exhaust roller 26, and a driving gear 30 is fixedly installed on the outer side of the end of the rotating shaft 27, and the driving gear 30 is meshed and connected between the gear ring 29 and the driving gear 30, and the driving gear 30 is rotatably installed on the outer side of the lower end of the rotating frame 25.

[0024] By adopting the above technical solution, the protective film on the unwinding roller 2 and the bottom mold are laminated and passed under the guide roller 10 and above the support roller 9, and then the first motor 5 is controlled to drive the threaded rod 6 to rotate, so that the threaded rod 6 drives the movable frame 7 to move downward through the threaded connection. At this time, the pressing roller 8 on the movable frame 7 can cooperate with the support roller 9 to press the protective film, and the winding roller 3 is controlled to rewind the pressed protective film. At the same time, the second motor 11 is started, so that the second motor 11 drives the cam 12 to rotate, so that the cam 12 reciprocates to push the movable plate 14 to perform elastic lifting and lowering adjustment. At this time, the movable plate 14 The rotating frame 25 below rotates elastically, thereby driving the exhaust roller 26 at the lower end of the rotating frame 25 to roll against the surface of the protective film, thereby achieving exhaust. As the exhaust roller 26 rotates, the gear ring 29 set at its end will be meshed and connected with the transmission gear 28, so that the transmission gear 28 drives the driving gear 30 to rotate through the meshing action, so that the rotating shaft 27 drives the rotating part 2701 on its outer side to rotate, so that the rotating part 2701 and the counterweight ball 2702 drive the exhaust roller 26 to vibrate under the action of centrifugal force, thereby improving the pressing effect on the protective film and achieving sufficient exhaust.

[0025] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above embodiment 1. The existing protective film laminating device is not convenient for automatically cleaning and preheating the protective film, so that the subsequent laminating effect is easily affected by impurities and temperature. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 3-Figure 9As shown, a cleaning pipe 31 is elastically rotatably installed on the left side of the bracket 4, and a nozzle is evenly connected to the cleaning pipe 31; the gas delivery assembly includes a guide column 15 fixedly installed on the upper surface of the fixed frame 13, and a sealing plug 16 is fixedly installed on the upper end of the guide column 15, and a gas cylinder 18 is evenly fixedly installed on the lower surface of the movable plate 14, and the sealing plug 16 is slidingly connected on the inner side of the gas cylinder 18 by interference fit, and the upper end of the gas cylinder 18 is respectively connected to the intake pipe 20 and the exhaust pipe 21, and the intake pipe 20 and the exhaust pipe 21 are both provided with a one-way valve structure, and the exhaust pipe 21 is connected to the gas collecting pipe 24, and a first spring 19 is connected between the fixed frame 13 and the lower end of the gas cylinder 18; a top column 17 is fixedly installed on the top of the sealing plug 16, and a sealing block 22 is connected to the inner upper end of the gas cylinder 18 through a second spring 23, and the sealing block 22 is attached to the inner wall of the upper end of the gas cylinder 18 to realize the lower end of the exhaust pipe 21 The sealing is performed, and at the same time, the lower surface of the sealing block 22 is set as an inclined surface, and the top column 17 contacts the inclined surface of the sealing block 22 and pushes the sealing block 22 to move elastically during the upward movement of the sealing plug 16, so as to release the blockage of the lower end of the exhaust pipe 21. During the upward movement of the sealing plug 16, the air inside the gas cylinder 18 is compressed; at the same time, the exhaust roller 26 is a hollow structure, and the inner wall of the exhaust roller 26 is evenly provided with a friction plate 2601 made of elastic material, and the outer wall of the rotating shaft 27 is evenly fixed with a rotating member 2701 with a fan-shaped structure. The rotating shaft 27 is a hollow structure, and a through hole is opened between the hollow structures of the rotating shaft 27 and the rotating member 2701, and the aperture of the through hole is smaller than the diameter of the counterweight ball 2702. The two ends of the rotating shaft 27 are respectively connected to the collecting pipe 24 and the cleaning pipe 31 through pipelines, and the outer side of the cleaning pipe 31 is connected with a pull rope 32, and the right end of the pull rope 32 is fixedly connected to the outer side of the movable plate 14.

[0026] By adopting the above technical solution, as the movable plate 14 moves downward, it will drive the guide column 15 and the gas cylinder 18 to reciprocate and adjust the lifting and lowering, so that the sealing plug 16 can slide back and forth on the inner side of the gas cylinder 18. At this time, the gas cylinder 18 can draw outside air through the air inlet pipe 20, and compress the air when the sealing plug 16 moves upward, thereby generating heat. When the top column 17 on the sealing plug 16 pushes the sealing block 22 to slide elastically, the exhaust pipe 21 can be released, so that the compressed and heated air enters the air collecting pipe 24 through the exhaust pipe 21, and enters the cavity of the rotating shaft 27 through the air collecting pipe 24, and the rotating shaft When the rotating part 27 drives the rotating part 2701 to rotate, the rotating part 2701 will generate heat by friction with the friction plate 2601, and the counterweight balls 2702 in the inner cavity of the rotating part 2701 will also generate heat by friction with each other, thereby further heating the air flowing through the cavity of the rotating shaft 27. The heated air will enter the cleaning tube 31 through the pipeline, and will be evenly blown toward the protective film through the nozzle on the cleaning tube 31, so as to clean and preheat the surface of the protective film, so as to improve the subsequent pressing effect. During the downward movement of the movable plate 14, the cleaning tube 31 will be pulled by the pull rope 32 to perform elastic reciprocating rotation, thereby improving the pretreatment effect on the protective film.

[0027] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective film laminating device, comprising a cabinet (1) placed above the ground, a reeling roller (2) being rotatably mounted on the upper surface of the left end of the cabinet (1), a reeling roller (3) being rotatably mounted on the upper surface of the right end of the cabinet (1), and an arched bracket (4) being fixedly mounted at the middle position of the upper surface of the reeling roller (3); It is characterized in that Guide rollers (10) are symmetrically arranged on both sides of the bracket (4), and the guide rollers (10) are rotatably mounted on the upper surface of the cabinet (1); a pressing assembly for pressing the protective film is arranged on the bracket (4); a second motor (11) is fixedly mounted on the upper surface of the bracket (4), and a cam (12) is fixedly mounted on the output end of the second motor (11); A fixed frame (13) is fixedly mounted on the upper surface of the cabinet (1), and a movable plate (14) is arranged above the fixed frame (13), and a gas transmission component is connected between the fixed frame (13) and the movable plate (14), and a gas collecting pipe (24) is fixedly mounted on the upper surface of the movable plate (14), and the gas outlet end of the gas transmission component is connected to the gas collecting pipe (24), a rotating frame (25) is elastically rotatably connected below the movable plate (14) via a torsion spring, and an inclined exhaust roller (26) is rotatably connected at the lower end of the rotating frame (25), and a heat generating component for heating air is arranged inside the exhaust roller (26), and a cleaning pipe (31) is elastically rotatably mounted on the left side of the bracket (4), and nozzles are evenly connected to the cleaning pipe (31).

2. A protective film laminating device according to claim 1, characterized in that: The pressing assembly comprises a first motor (5) fixedly mounted on the upper surface of the bracket (4), and a threaded rod (6) is fixedly mounted on the output end of the first motor (5), and the lower end of the threaded rod (6) passes through the upper end of the bracket (4) and is threadedly connected to a movable frame (7), and the movable frame (7) slides in contact with the side wall of the bracket (4), and a pressing roller (8) is rotatably mounted on the inner side of the movable frame (7).

3. A protective film laminating device according to claim 2, characterized in that: A support roller (9) is rotatably mounted on the inner side of the bracket (4), and the laminating roller (8) moves downward to cooperate with the support roller (9) to extrude the protective film, and during the conveyance of the protective film, the laminating roller (8) and the support roller (9) press the protective film.

4. The protective film laminating device according to claim 1, characterized in that: The movable plate (14) forms an elastic lifting structure through the air delivery assembly and the fixing frame (13), and the second motor (11) drives the cam (12) to rotate to push the movable plate (14) downward.

5. A protective film laminating device according to claim 4, characterized in that: The gas delivery assembly comprises a guide column (15) fixedly mounted on the upper surface of a fixing frame (13), a sealing plug (16) fixedly mounted on the upper end of the guide column (15), and a gas delivery cylinder (18) evenly fixedly mounted on the lower surface of the movable plate (14), and the sealing plug (16) is slidably connected to the inner side of the gas delivery cylinder (18) by interference fit, the upper end of the gas delivery cylinder (18) is respectively connected to an intake pipe (20) and an exhaust pipe (21), and both the intake pipe (20) and the exhaust pipe (21) are provided with a one-way valve structure, and the exhaust pipe (21) is connected to a gas collecting pipe (24), and a first spring (19) is connected between the fixing frame (13) and the lower end of the gas delivery cylinder (18).

6. A protective film laminating device according to claim 5, characterized in that: A top column (17) is fixedly mounted on the top of the sealing plug (16), and a sealing block (22) is connected to the inner upper end of the gas cylinder (18) via a second spring (23), and the sealing block (22) is fitted to the inner wall of the upper end of the gas cylinder (18) to seal the lower end of the exhaust pipe (21), and the lower surface of the sealing block (22) is arranged in an inclined surface, and when the sealing plug (16) moves upward, the top column (17) contacts the inclined surface of the sealing block (22) and pushes the sealing block (22) to move elastically, so as to release the blockage of the lower end of the exhaust pipe (21), and the air inside the gas cylinder (18) is compressed during the upward movement of the sealing plug (16).

7. The protective film laminating device according to claim 1, characterized in that: The rotating frame (25) is arranged in an inclined shape, and the exhaust roller (26) rotatably connected to the lower end of the rotating frame (25) is in contact with the upper surface of the protective film, and the movable plate (14) pushes the rotating frame (25) to rotate during the downward movement, while the exhaust roller (26) is in contact with the surface of the protective film and rolls.

8. A protective film laminating device according to claim 7, characterized in that: The heat generating component comprises a rotating shaft (27) which penetrates and is rotatably mounted on the lower end of the rotating frame (25), and the rotating shaft (27) penetrates the exhaust roller (26), and the exhaust roller (26) and the rotating shaft (27) are coaxially arranged, and the exhaust roller (26) is a hollow structure, and the inner wall of the exhaust roller (26) is evenly provided with a friction plate (2601) made of elastic material, and the outer wall of the rotating shaft (27) is evenly fixedly provided with a rotating member (2701) with a fan-shaped structure, and the inner side of the rotating member (2701) is a hollow structure. The hollow part of the rotating member (2701) is filled with a weight ball (2702), and the friction plate (2601) is attached to the outer wall of the rotating member (2701). A gear ring (29) is fixedly installed on the inner side of both ends of the exhaust roller (26), and a driving gear (30) is fixedly installed on the outer side of the end of the rotating shaft (27). The driving gear (30) is meshedly connected between the gear ring (29) and the driving gear (30), and the driving gear (30) is rotatably installed on the outer side of the lower end of the rotating frame (25).

9. A protective film laminating device according to claim 8, characterized in that: The rotating shaft (27) is a hollow structure, and a through hole is provided between the hollow structures of the rotating shaft (27) and the rotating member (2701), and the aperture of the through hole is smaller than the diameter of the counterweight ball (2702). The two ends of the rotating shaft (27) are respectively connected to the gas collecting pipe (24) and the cleaning pipe (31) through pipes, and a pull rope (32) is wound around the outside of the cleaning pipe (31), and the right end of the pull rope (32) is fixedly connected to the outside of the movable plate (14).

10. The protective film laminating device according to claim 1, characterized in that: A method for using the pressing device is also disclosed, and the specific method steps are as follows: S1, unwinding the protective film and the base film through the unwinding roller (2), passing the protective film and the base film under the guide roller (10) and over the support roller (9) after the protective film and the base film are bonded together, and then rewinding them through the rewinding roller (3), while controlling the first motor (5) to drive the laminating roller (8) to move downward, and cooperating with the support roller (9) to clamp the protective film; S2, starting the winding roller (3) to wind up the protective film, so that the laminating roller (8) and the supporting roller (9) press the protective film, and at the same time starting the second motor (11) to drive the cam (12), thereby pushing the movable plate (14) to move up and down, thereby driving the exhaust roller (26) to squeeze the pressed protective film, thereby achieving automatic exhaust; S3. As the movable plate (14) reciprocates and rises, the air delivery cylinder (18) can automatically extract air, compress it to generate heat, and then transport it to the air collecting pipe (24), and then transport it to the hollow structure of the rotating shaft (27) through the pipeline. At the same time, the exhaust roller (26) will drive the rotating shaft (27) and the rotating member (2701) to rotate during the rotation process, so that the rotating member (2701) generates a centrifugal effect during the rotation process, thereby causing the exhaust roller (26) to vibrate during the rolling process, further improving the exhaust effect, and friction will occur during the shaking process of the counterweight ball (2702). At the same time, the friction plate (2601) and the rotating member (2701) will rub against each other, thereby heating the air flowing through the rotating shaft (27), and the heated air is blown to the outside of the unpressed protective film through the nozzle on the cleaning pipe (31), thereby achieving preheating and cleaning.

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