Liquid crystal display panel laminating equipment

Abstract

The present invention belongs to the technical field of liquid crystal display production, and specifically is a liquid crystal display panel bonding device, comprising a workbench, a first slide rail is arranged on one side of the workbench; a first sliding trolley is slidably connected to the inside of the first slide rail, a first hydraulic cylinder is arranged on the top of the first sliding trolley, a connecting frame is arranged on the top of the output end of the first hydraulic cylinder, a bearing frame is arranged on the end of the connecting frame away from the first hydraulic cylinder, and a plurality of second hydraulic cylinders are arranged on the top of the bearing frame; the liquid crystal display panel bonding device described in the present invention is provided with an exhaust box; when in use, a sealed space is formed between the panel and the touch screen in the exhaust box; the sealed space is evacuated, and then the touch screen is controlled to move downward to bond with the panel below; during the entire bonding process, the air between the panel and the touch screen is fully evacuated, effectively limiting the residual air between the panel and the touch screen after bonding, which is beneficial to improving the bonding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid crystal display screen production, in particular to a liquid crystal display screen panel bonding device. Background Art

[0002] The liquid crystal display is a flat, thin display device composed of a certain number of color or black and white pixels, placed in front of a light source or a reflective surface; specifically, when the liquid crystal display module is produced, the liquid crystal panel and the touch screen need to be bonded together, and the touch screen needs to be bonded to the upper side of the liquid crystal display, and the two overlap each other. The display screen of the liquid crystal display can be operated through the touch screen.

[0003] When attaching a touch screen to a display panel, the existing production line needs to first fix the display panel, then use a suction cup to absorb the touch screen, and then transfer the touch screen to the surface of the display panel for bonding. During the bonding process, the air between the display panel and the touch screen is squeezed out. However, in the actual bonding process, it may be difficult to completely discharge the air between the display panel and the touch screen, resulting in air easily remaining between the display panel and the touch screen, which in turn reduces the bonding quality.

[0004] To this end, the present invention provides a liquid crystal display panel laminating device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the liquid crystal display panel bonding device described in the present invention comprises a workbench, a first slide rail is arranged on one side of the workbench; a first sliding trolley is slidably connected inside the first slide rail, a first hydraulic cylinder is arranged on the top of the first sliding trolley, a connecting frame is arranged on the output end of the first hydraulic cylinder, a bearing frame is arranged on the end of the connecting frame away from the first hydraulic cylinder, a plurality of second hydraulic cylinders are arranged on the top of the bearing frame, and a vacuum suction cup is arranged on the bottom end of the output end of the second hydraulic cylinder;

[0007] A vacuum box is provided at the top of the workbench, and the internal dimensions of the vacuum box are the same as those of the panel and the touch screen; a one-way valve is provided on the side of the vacuum box, and an output end of the one-way valve is externally connected to an air pump;

[0008] A first conveyor is arranged on one side of the workbench, and a second conveyor is arranged on the other side of the workbench.

[0009] Preferably, a connecting pipe is provided on the side of the vacuum box, and an air cylinder is provided at one end of the connecting pipe away from the vacuum box, the top of the air cylinder is sealed and the bottom is connected; a support frame is provided at the bottom end of the air cylinder, and an air plate is slidably connected to the top of the support frame and located inside the air cylinder.

[0010] Preferably, a pair of discharge holes are opened on both sides of the vacuum box, a push plate is inserted into one of the discharge holes, a third hydraulic cylinder is externally connected to the push plate, the third hydraulic cylinder is installed on the side of the workbench, and the output end of the third hydraulic cylinder is connected to the push plate;

[0011] A blocking plate is provided at the opening of another unloading hole, and a fourth hydraulic cylinder is provided above the blocking plate. The fourth hydraulic cylinder is installed on one side of the vacuum box and the output end is connected to the blocking plate; a receiving plate is provided on one side of the top of the workbench close to the blocking plate; the receiving plate is close to the end of the blocking plate and is located at the bottom of the blocking plate.

[0012] Preferably, a plurality of receiving rollers are evenly rotated on the top surface of the receiving plate.

[0013] Preferably, a fifth hydraulic cylinder is arranged at the center of the top of the carrying frame, a carrying plate is arranged at the bottom of the output end of the fifth hydraulic cylinder, and the length of the carrying plate is the same as the internal width of the vacuum box; a pair of first notches are opened at the bottom of the carrying plate based on central symmetry, and a magnetic plate is arranged inside the first notch; the carrying plate is made of magnetic material; and the magnetic plate is initially adsorbed in the first notch by magnetic force;

[0014] A pair of second slide rails are arranged on one side of the vacuum box and at the top of the workbench, a second sliding trolley is slidably connected inside the second slide rails, and an electromagnet is arranged on the top of the second sliding trolley.

[0015] Preferably, a second notch is provided at the center of the bottom end of the supporting plate, and an airbag is arranged inside the second notch.

[0016] Preferably, two pairs of rectangular holes are symmetrically opened on both sides of the vacuum box, a pad is inserted into the inside of the rectangular hole, a linkage frame is provided at one end of the pad outside the rectangular hole, a sixth hydraulic cylinder is provided on one side of the linkage frame, the sixth hydraulic cylinder is installed on the top of the workbench and the output end of the sixth hydraulic cylinder is connected to the linkage frame.

[0017] Preferably, a pair of receiving holes are symmetrically opened on both sides of the vacuum box, and the ends of the receiving holes are connected to the rectangular hole; a regulating plate is inserted into the inside of the receiving hole, and a driving component is provided on one side of the regulating plate outside the receiving hole.

[0018] Preferably, the driving assembly includes a motor installed on the side of the vacuum box, and a friction wheel is provided at the end of the output end of the motor, and there is a constant extrusion friction force between the wheel surface of the friction wheel and the surface of the regulating plate.

[0019] Preferably, a vibrator is provided at the bottom end of the workbench, and is opened and closed by a microcomputer, automatically starting during the lamination process and automatically closing after the lamination is completed.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention discloses a liquid crystal display panel bonding device, which is provided with an air extraction box; when in use, a sealed space exists between the panel and the touch screen in the air extraction box; the sealed space is evacuated, and then the touch screen is controlled to move downward to bond with the panel below; during the entire bonding process, the air between the panel and the touch screen is fully extracted, which effectively limits the residual air between the panel and the touch screen after bonding, and is beneficial to improving the bonding quality.

[0022] 2. The liquid crystal display panel bonding device described in the present invention is provided with an air cylinder; when the air pump box is evacuated, the air cylinder connected to the air pump box through the connecting pipe maintains the same pressure as the sealed space between the air pump box; when the pressure of the sealed space in the air pump box is reduced to a certain level, that is, the negative pressure continues to increase to cause the touch screen to deform and damage; the air plate inside the air cylinder is pumped upward by the negative pressure, and a guide rod that passes through the top of the air cylinder is provided at the top of the air plate; the staff stops pumping when they observe the guide rod; and when the air plate moves upward, it stabilizes the air pressure inside the air pump box, thereby preventing the negative pressure of the gas from further increasing; it is convenient for the staff to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 is a stereogram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the workbench of the present invention;

[0026] Figure 3 is a schematic diagram of the vacuum box of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection structure of the vacuum box of the present invention;

[0028] Figure 5 It is a schematic diagram of the position of the blocking plate of the present invention;

[0029] Figure 6 It is a schematic diagram of the gas cylinder connection structure of the present invention;

[0030] Figure 7It is a schematic diagram of the connection structure of the bearing frame of the present invention;

[0031] Figure 8 is a schematic diagram of a carrier plate of the present invention;

[0032] Fig. 9 is a schematic diagram of a second slide rail of the present invention;

[0033] Fig.10 It is a schematic diagram of the connection structure of the pad of the present invention;

[0034] Fig.11 It is a schematic diagram of the connection structure of the control board of the present invention.

[0035] In the figure: 1, workbench; 2, first slide rail; 21, first sliding trolley; 22, first hydraulic cylinder; 23, connecting frame; 24, bearing frame; 241, second hydraulic cylinder; 242, vacuum suction cup; 243, fifth hydraulic cylinder; 244, bearing plate; 245, first notch; 246, magnetic plate; 247, second notch; 248, airbag; 3, first conveyor; 31, second conveyor; 4, vacuum box; 40, rectangular hole; 4 01. receiving hole; 41. one-way valve; 42. connecting pipe; 43. air cylinder; 44. air plate; 45. support frame; 46. discharge hole; 47. push plate; 471. blocking plate; 48. third hydraulic cylinder; 49. receiving plate; 491. fourth hydraulic cylinder; 5. second slide rail; 51. second sliding trolley; 52. electromagnet; 6. pad; 61. linkage frame; 62. sixth hydraulic cylinder; 7. regulating plate; 71. friction wheel; 72. motor. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figure 1 to Figure 2 As shown, a liquid crystal display panel bonding device according to an embodiment of the present invention comprises a workbench 1, a first slide rail 2 is arranged on one side of the workbench 1; a first sliding trolley 21 is slidably connected inside the first slide rail 2, a first hydraulic cylinder 22 is arranged on the top of the first sliding trolley 21, a connecting frame 23 is arranged on the output end of the first hydraulic cylinder 22, a bearing frame 24 is arranged on the end of the connecting frame 23 away from the first hydraulic cylinder 22, a plurality of second hydraulic cylinders 241 are arranged on the top of the bearing frame 24, and a vacuum suction cup 242 is arranged on the bottom of the output end of the second hydraulic cylinder 241;

[0038] A vacuum box 4 is provided at the top of the workbench 1, and the internal dimensions of the vacuum box 4 are the same as those of the panel and the touch screen; a one-way valve 41 is provided on the side of the vacuum box 4, and an air pump is externally connected to the output end of the one-way valve 41;

[0039] A first conveyor 3 is provided on one side of the workbench 1, and a second conveyor 31 is provided on the other side of the workbench 1;

[0040] When the touch screen is now attached to the display panel, it may be difficult to completely exhaust the air between the display panel and the touch screen, resulting in residual air between the display panel and the touch screen, which in turn reduces the quality of the attachment. To solve the above problems, the embodiment of the present invention provides a plurality of structures such as an air extraction box 4 and a vacuum suction cup 242. The specific use process is as follows. When in use, the first conveyor 3 conveys the display panel to a position close to the workbench 1, and similarly, the second conveyor 31 also conveys the touch screen to a position close to the workbench 1. Then, the first sliding trolley 21 is started, and the first sliding trolley 21 drives the first hydraulic cylinder 22 to move synchronously. The first hydraulic cylinder 22 drives the bearing frame 24 to move synchronously through the connecting frame 23. Then, by cooperating with the second hydraulic cylinder 241 and the vacuum suction cup 242, the display panel on the first conveyor 3 is first transferred to the inside of the air extraction box 4, and then the air extraction box 4 is The internal suction cup sucks and fixes the bottom of the panel; then the touch screen is transferred to the interior of the vacuum box 4. At this time, there is no contact between the panel and the touch screen, and the internal size of the vacuum box 4 is the same as that of the panel and the touch screen; therefore, there is a sealed space between the panel and the touch screen; then the air pump externally connected to the one-way valve 41 is started to extract the air in the sealed space of the vacuum box 4, and the air is stopped when it is extracted to a certain extent to prevent the negative pressure in the sealed space from being too large, causing deformation and damage to the touch screen; then the touch screen is controlled to move downward to fit the panel below; during the entire bonding process, the air between the panel and the touch screen is fully extracted, which effectively limits the residual air between the panel and the touch screen after bonding, which is beneficial to improving the bonding quality; it should be pointed out that when unloading after bonding, it is necessary to first release the suction cup in the vacuum box 4 from the bottom of the panel; then the bonded panel is transferred through the vacuum suction cup 242.

[0041] like Figures 1 to 6 As shown, a connecting pipe 42 is provided on the side of the vacuum box 4, and an end of the connecting pipe 42 away from the vacuum box 4 is connected to an air cylinder 43, and the top of the air cylinder 43 is sealed and connected to the bottom; a support frame 45 is provided at the bottom of the air cylinder 43, and an air plate 44 is slidably connected to the top of the support frame 45 and located inside the air cylinder 43; when the vacuum box 4 is evacuated, the pressure of the sealed space of the air cylinder 43 and the vacuum box 4 is kept the same through the connecting pipe 42; when the pressure of the sealed space in the vacuum box 4 is reduced to a certain level, that is, the negative pressure continues to increase, which will cause the touch screen to deform and be damaged; the air plate 44 inside the air cylinder 43 is drawn upward by the negative pressure, and a guide rod is provided on the top of the air plate 44 to pass through the top of the air cylinder 43; the staff stops pumping when observing the guide rod; and when the air plate 44 moves upward, it stabilizes the air pressure inside the vacuum box 4, thereby preventing the negative pressure of the gas from further increasing; it is convenient for the staff to operate.

[0042] A pair of discharge holes 46 are provided on both sides of the vacuum box 4, a push plate 47 is inserted into one of the discharge holes 46, and a third hydraulic cylinder 48 is externally connected to the push plate 47. The third hydraulic cylinder 48 is installed on the side of the workbench 1, and the output end of the third hydraulic cylinder 48 is connected to the push plate 47;

[0043] A blocking plate 471 is provided at the opening of the other unloading hole 46, and a fourth hydraulic cylinder 491 is provided above the blocking plate 471. The fourth hydraulic cylinder 491 is installed on one side of the vacuum box 4 and the output end is connected to the blocking plate 471; a receiving plate 49 is provided on the side of the top of the workbench 1 close to the blocking plate 471; the receiving plate 49 is close to the end of the blocking plate 471 and is located at the bottom of the blocking plate 471; when the bonding is completed, the third hydraulic cylinder 48 is started, and the third hydraulic cylinder 48 controls the push plate 47 to move into the vacuum box 4 through the unloading hole 46, thereby pushing the bonded panel in the vacuum box 4; at the same time, the fourth hydraulic cylinder 491 is started, and the fourth hydraulic cylinder 491 drives the blocking plate 471 to move upward, and the blocking plate 471 releases the blockage of the other unloading hole 46; the panel inside the vacuum box 4 is pushed out onto the receiving plate 49 through the unloading hole 46, and the unloading is completed, thereby improving the automation effect of the equipment.

[0044] The top surface of the receiving plate 49 is provided with a plurality of receiving rollers for uniform rotation, thereby reducing the friction force of the panel on the receiving plate 49 and protecting the panel.

[0045] like Figures 3 to 11 As shown, a fifth hydraulic cylinder 243 is provided at the center of the top of the carrying frame 24, and a carrying plate 244 is provided at the bottom of the output end of the fifth hydraulic cylinder 243, and the length of the carrying plate 244 is the same as the internal width of the vacuum box 4; a pair of first notches 245 are opened at the bottom of the carrying plate 244 based on central symmetry, and a magnetic plate 246 is provided inside the first notch 245; the carrying plate 244 is made of magnetic material; initially, the magnetic plate 246 is adsorbed in the first notch 245 by magnetic force;

[0046] A pair of second slide rails 5 are provided on one side of the vacuum box 4 and at the top of the workbench 1. A second sliding trolley 51 is slidably connected inside the second slide rails 5. An electromagnet 52 is provided on the top of the second sliding trolley 51. When the touch screen is attached to the panel, it is necessary to drive the touch screen to move downward after the sealed space between the touch screen and the panel is evacuated. When the touch screen moves down close to the panel, it stops. Then, the electromagnet 52 is energized. The electromagnet 52 generates magnetic attraction to the magnetic plate 246 in the first notch 245 at the bottom end of the carrier plate 244. Then, the carrier plate 244 is driven to move downward through the fifth hydraulic cylinder 243, so that The middle part of the touch screen is bent downward and contacts the panel, and then the second sliding carriage 51 is controlled to slide on the second slide rail 5. The pair of second sliding carriages 51 move in opposite directions, driving the electromagnet 52 to move synchronously during movement, and the electromagnet 52 drives the magnetic plate 246 to move synchronously. The magnetic plate 246 moves toward the end of the touch screen, so that the touch screen is gradually attached to the panel from the middle to the two ends, and the residual air between the touch screen and the panel is further driven away, which is beneficial to further improve the bonding quality; at the same time, the vacuum suction cup 242 is adaptively released from the adsorption of the touch screen and moves upward to avoid hindering the movement of the magnetic plate 246.

[0047] A second notch 247 is provided at the center of the bottom end of the supporting plate 244, and an airbag 248 is provided inside the second notch 247; when the supporting plate 244 is controlled to move downward, the airbag 248 is inflated synchronously, and after the airbag 248 expands, it presses against the touch screen below, thereby causing the middle position of the touch screen to be concave downward and fit with the panel below; thereafter, when the supporting plate 244 squeezes the touch screen below to be completely attached to the panel, the airbag 248 is squeezed into the second notch 247; the touch screen located between a pair of magnetic plates 246 is fully fitted to the panel through the pressure of the airbag 248, thereby ensuring the fitting effect.

[0048] Two pairs of rectangular holes 40 are symmetrically provided on both sides of the vacuum box 4, and a pad 6 is inserted into the inside of the rectangular hole 40. A linkage frame 61 is provided at one end of the pad 6 outside the rectangular hole 40, and a sixth hydraulic cylinder 62 is provided on one side of the linkage frame 61. The sixth hydraulic cylinder 62 is installed on the top of the workbench 1 and the output end of the sixth hydraulic cylinder 62 is connected to the linkage frame 61; when the touch screen is driven to fit onto the panel through the magnetic plate 246, the pad 6 is controlled to extend into the vacuum box 4, and then the vacuum suction cup 242 releases the adsorption of the touch screen; and as the magnetic plate 246 moves toward the end of the touch screen, the pad 6 is controlled by the sixth hydraulic cylinder 62 and the linkage frame 61 to gradually separate from the vacuum box 4, so as to avoid damage to the end of the touch screen due to excessive force, so as to facilitate use by the staff.

[0049] A pair of receiving holes 401 are symmetrically provided on both sides of the vacuum box 4, and the ends of the receiving holes 401 are connected to the rectangular hole 40; an adjusting plate 7 is inserted into the inside of the receiving hole 401, and a driving component is provided on one side of the adjusting plate 7 located outside the receiving hole 401; when the touch screen is squeezed and bent, the driving component continuously controls the adjusting plate 7 to squeeze the end of the touch screen, so as to avoid a gap between the end of the touch screen and the vacuum box 4 when the touch screen is bent, which may cause air leakage in the space between the touch screen and the panel.

[0050] The driving assembly includes a motor 72 installed on the side of the vacuum box 4, and a friction wheel 71 is provided at the end of the output end of the motor 72. There is a constant extrusion friction force between the wheel surface of the friction wheel 71 and the surface of the regulating plate 7. When the motor 72 is started in use, the motor 72 drives the friction wheel 71 to continuously rotate with the surface of the regulating plate 7. The friction wheel 71 continuously drives the regulating plate 7 to press against the end of the touch screen with a stable pressing force through friction force, thereby preventing the end of the touch screen from being excessively squeezed and damaged.

[0051] A vibrator is provided at the bottom of the workbench 1, and is turned on and off by a microcomputer, automatically starting during the bonding process and automatically shutting down after the bonding is completed. Starting the vibrator during use is beneficial to improving the firmness of the bonding between the touch screen and the panel.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid crystal display panel bonding device, characterized in that: The invention comprises a workbench (1), wherein a first slide rail (2) is arranged on one side of the workbench (1); a first sliding trolley (21) is slidably connected inside the first slide rail (2); a first hydraulic cylinder (22) is arranged at the top end of the first sliding trolley (21); a connecting frame (23) is arranged at the output end of the first hydraulic cylinder (22); a bearing frame (24) is arranged at the end of the connecting frame (23) away from the first hydraulic cylinder (22); a plurality of second hydraulic cylinders (241) are arranged at the top end of the bearing frame (24); a vacuum suction cup (242) is arranged at the bottom end of the output end of the second hydraulic cylinder (241); A vacuum box (4) is arranged at the top of the workbench (1), and the internal dimensions of the vacuum box (4) are the same as those of the panel and the touch screen; a one-way valve (41) is arranged on the side of the vacuum box (4), and an output end of the one-way valve (41) is externally connected to an air pump; A first conveyor (3) is arranged on one side of the workbench (1), and a second conveyor (31) is arranged on the other side of the workbench (1); a fifth hydraulic cylinder (243) is arranged at the center of the top end of the support frame (24), and a support plate (244) is arranged at the bottom end of the output end of the fifth hydraulic cylinder (243), and the length of the support plate (244) is the same as the internal width of the vacuum box (4); a pair of first notches (245) are opened at the bottom end of the support plate (244) based on central symmetry, and a magnetic plate (246) is arranged inside the first notch (245); the support plate (244) is made of magnetic material; initially, the magnetic plate (246) is adsorbed in the first notch (245) by magnetic force; A pair of second slide rails (5) are provided on one side of the vacuum box (4) and at the top of the workbench (1), the second slide rails (5) are slidably connected to a second sliding trolley (51) inside, and an electromagnet (52) is provided at the top of the second sliding trolley (51); a second notch (247) is provided at the center of the bottom end of the support plate (244), and an air bag (248) is provided inside the second notch (247); two pairs of rectangular holes (40) are symmetrically provided on both sides of the vacuum box (4), a pad (6) is inserted inside the rectangular hole (40), a linkage frame (61) is provided at one end of the pad (6) outside the rectangular hole (40), and a sixth hydraulic cylinder is provided on one side of the linkage frame (61). (62), the sixth hydraulic cylinder (62) is installed on the top of the workbench (1) and the output end of the sixth hydraulic cylinder (62) is connected to the linkage frame (61); a pair of receiving holes (401) are symmetrically opened on both sides of the vacuum box (4), and the ends of the receiving holes (401) are connected to the rectangular hole (40); a regulating plate (7) is inserted into the inside of the receiving hole (401), and a driving component is arranged on the side of the regulating plate (7) located outside the receiving hole (401); the driving component includes a motor (72) installed on the side of the vacuum box (4), and a friction wheel (71) is arranged at the end of the output end of the motor (72), and there is a constant extrusion friction between the wheel surface of the friction wheel (71) and the surface of the regulating plate (7).

2. The liquid crystal display panel bonding device according to claim 1, characterized in that: A connecting pipe (42) is provided on the side of the vacuum box (4), and an end of the connecting pipe (42) away from the vacuum box (4) is connected to an air cylinder (43), and the top end of the air cylinder (43) is sealed and the bottom end is connected; a support frame (45) is provided at the bottom end of the air cylinder (43), and an air plate (44) is slidably connected to the top end of the support frame (45) and located inside the air cylinder (43).

3. The liquid crystal display panel bonding device according to claim 1, characterized in that: A pair of discharge holes (46) are provided on both sides of the vacuum box (4), a push plate (47) is inserted into one of the discharge holes (46), a third hydraulic cylinder (48) is externally connected to the push plate (47), the third hydraulic cylinder (48) is installed on the side of the workbench (1), and the output end of the third hydraulic cylinder (48) is connected to the push plate (47); A blocking plate (471) is provided at the opening of another discharge hole (46), a fourth hydraulic cylinder (491) is provided above the blocking plate (471), the fourth hydraulic cylinder (491) is installed on one side of the vacuum box (4) and the output end is connected to the blocking plate (471); a receiving plate (49) is provided on the top of the workbench (1) near the blocking plate (471); the receiving plate (49) is close to the end of the blocking plate (471) and is located at the bottom of the blocking plate (471).

4. The liquid crystal display panel bonding device according to claim 3, characterized in that: The top surface of the receiving plate (49) is provided with a plurality of receiving rollers which rotate evenly.

5. The liquid crystal display panel bonding device according to claim 1, characterized in that: A vibrator is provided at the bottom end of the workbench (1), and is turned on and off by a microcomputer, automatically starting during the lamination process and automatically closing after the lamination is completed.

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