A counter-rotating PCB board automatic laminating machine

Abstract

The present invention relates to the field of circuit board lamination, specifically to a counter-rotating PCB board automatic lamination machine, comprising a base, on which a symmetrically arranged fixing plate is fixedly installed, and a receiving plate is also fixed on the base, characterized in that the counter-rotating PCB board automatic lamination machine also comprises: a vertical lamination mechanism, which is arranged on the fixing plate, and the vertical lamination mechanism comprises a vertical lamination assembly and a rotating roller; a driving assembly, which is arranged on the base and connected to the vertical lamination assembly, and the driving assembly can drive the rotating roller to rotate when the vertical lamination assembly moves, and the fixing plate is provided with a transverse lamination mechanism connected to the driving assembly, and the transverse lamination mechanism comprises a transverse lamination assembly and a pressing roller; a guiding assembly, which is arranged on the vertical lamination assembly and connected to the transverse lamination assembly, and the base is provided with a limiting mechanism connected to the transverse lamination assembly and the vertical lamination assembly.

Description

Technical Field

[0001] The invention relates to the field of circuit board lamination, in particular to a counter-rotating automatic lamination machine for PCB boards. Background Art

[0002] With the rapid development of the electronics industry, circuit board wiring is becoming more and more sophisticated. Most circuit board manufacturers use dry film to complete pattern transfer, and the use of dry film is becoming more and more popular. In PCB production, we will mention the concept of pattern transfer, because the production of conductive patterns is the foundation of PCB production. Therefore, the pattern transfer process is of great significance to PCB production.

[0003] The inner layer dry film includes multiple processes such as inner layer film lamination, exposure and development, and inner layer etching. The inner layer film lamination is to paste a special photosensitive film on the surface of the copper plate, which is what we call a dry film. This film will solidify when exposed to light, forming a protective film on the board. Exposure and development is to expose the board with the film, and the light-transmitting part is solidified, and the non-light-transmitting part is still a dry film. Then after development, the uncured dry film is removed, and the board with the cured protective film is etched. After the film is removed, the inner layer circuit pattern is transferred to the board. During the film lamination process, bubbles should be avoided as much as possible. If there are bubbles, it will cause the film to be stripped in the subsequent development and etching. Even if the bubbles are not on the line, the circuit board needs to be repaired after the development. The main reason for the existence of bubbles is that there is spatial overlap in the length or width direction of the film, which causes bubbles or even wrinkles after the film is attached to the copper foil. Summary of the invention

[0004] The object of the present invention is to provide a counter-rotating automatic laminator for PCB boards to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A counter-rotating PCB board automatic laminating machine comprises a base, on which a symmetrically arranged fixing plate is fixedly mounted, and a receiving plate for holding a circuit board is also fixed on the base, characterized in that the counter-rotating PCB board automatic laminating machine further comprises:

[0007] A vertical film pressing mechanism is arranged on the fixed plate, and the vertical film pressing mechanism comprises a vertical film pressing assembly and a rotating roller, and the vertical film pressing assembly can drive the rotating roller to perform film lamination on the film placed on the receiving plate;

[0008] A driving assembly is arranged on the base and connected to the vertical film pressing assembly. The driving assembly can drive the rotating roller to rotate when the vertical film pressing assembly moves. A transverse film pressing mechanism connected to the driving assembly is arranged on the fixed plate. The transverse film pressing mechanism includes a transverse film pressing assembly and symmetrically arranged pressing rollers. The driving assembly can drive the two pressing rollers to move closer to or away from each other through the transverse film pressing assembly.

[0009] A guide assembly is arranged on the vertical film pressing assembly and connected to the transverse film pressing assembly. The guide assembly can adjust the height of the pressing roller when the transverse film pressing assembly moves. A limiting mechanism connected to the transverse film pressing assembly and the vertical film pressing assembly is arranged on the base. The limiting mechanism is used to control the intermittent rotation of the pressing roller through the transverse film pressing assembly.

[0010] As a further solution of the present invention: the vertical film pressing assembly includes a screw rod rotatably mounted on the fixed plate, a threaded sleeve movably mounted on the screw rod and cooperating with the screw rod thread, a baffle is fixed on the threaded sleeve, a guide structure connected to the baffle is provided on the fixed plate, the baffle is rotatably connected to the rotating roller and connected to the driving assembly, and the guide structure is connected to the horizontal film pressing assembly and the limiting mechanism.

[0011] As a further solution of the present invention: the guide structure includes a guide rod fixedly mounted on the fixed plate, a guide sleeve movably mounted on the guide rod, the baffle plate fixed on the guide sleeve, and a support plate connected to the guide assembly and the limiting mechanism fixed on the baffle plate.

[0012] As a further solution of the present invention: the driving assembly includes a motor fixedly mounted on the baffle, a transmission rod rotatably mounted on the baffle and connected to the motor output shaft, and a belt sleeved on the transmission rod and connected to the rotating shaft of the rotating roller, and the transmission rod is connected to the transverse film pressing assembly.

[0013] As a further solution of the present invention: the transverse film pressing assembly includes a guide groove provided on the transmission rod, a fixed rod fixedly installed on the baffle, and a movable sleeve movably installed on the fixed rod and symmetrically arranged, a rhombus block engaged with the guide groove is rotatably installed on the movable sleeve, and a sliding structure connected with the movable sleeve is arranged on the base;

[0014] The sliding structure is connected to the limiting mechanism and the guiding assembly and fixedly connected to the pressure roller, a limiting groove No. 1 is provided on the movable sleeve, and a limiting rod No. 1 engaged with the limiting groove No. 1 is fixed on the fixed rod.

[0015] As a further solution of the present invention: the sliding structure includes a sliding plate fixedly mounted on the movable sleeve, a sliding groove is provided on the sliding plate, a sliding block is slidably mounted in the sliding groove, a rotating rod is rotatably mounted on the sliding block, the rotating rod is fixedly connected to the pressure roller, and the rotating rod is connected to the guide assembly and the limiting mechanism.

[0016] As a further solution of the present invention: the guide assembly includes guide grooves opened on the support plate and symmetrically arranged, a guide rod rotatably mounted on the support plate, and a limit block fixedly mounted on the support plate and abutting against the guide rod, and the guide grooves are engaged with the rotating rod.

[0017] As a further solution of the present invention: the limiting mechanism includes a tilting block and a tilting rod fixedly mounted on the support plate and symmetrically arranged, a toothing assembly arranged on the support plate and connected to the rotating rod, and a guide wheel fixedly mounted on the toothing assembly and symmetrically arranged, and the guide wheel cooperates with the tilting block and the tilting rod.

[0018] As a further solution of the present invention: the engaging assembly includes a limiting sleeve movably mounted on the rotating rod, a gear fixedly mounted on the limiting sleeve, a rack plate fixedly mounted on the support plate and meshing with the gear, the limiting sleeve is fixedly connected to the guide wheel, a No. 2 limiting groove is provided on the limiting sleeve, and a No. 2 limiting rod engaged with the No. 2 limiting groove is fixed on the rotating rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can perform film coating processing on the film through the vertical film pressing mechanism. At the same time, the driving component applies a pre-tightening force in the length direction of the film through the vertical film pressing mechanism. The driving component will also drive the transverse film pressing mechanism to apply a pre-tightening force in the width direction of the film, and under the action of the guiding component, the height of the pressing roller is controlled. When the transverse film pressing mechanism moves, the limiting mechanism will control the intermittent rotation of the pressing roller to increase the applied pre-tightening force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of an embodiment of a counter-rotating PCB board automatic laminating machine.

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0022] Figure 3 The figure is a structural schematic diagram of another angle in an embodiment of a counter-rotating PCB board automatic laminating machine.

[0023] Figure 4The present invention is a schematic diagram of the connection relationship among a driving assembly, a part of a lateral laminating mechanism, a vertical laminating mechanism, a guiding assembly, and a limiting mechanism in one embodiment of a reverse-rotating PCB board automatic laminating machine.

[0024] Figure 5 The present invention is a schematic structural diagram of part of the driving components and part of the lateral laminating mechanism in one embodiment of a counter-rotating PCB board automatic laminating machine.

[0025] Figure 6 The figure is a schematic diagram of the exploded structure of a part of the lateral laminating mechanism in one embodiment of a counter-rotating PCB board automatic laminating machine.

[0026] Figure 7 The present invention is a schematic diagram of the connection relationship between the guide assembly and part of the limiting mechanism in one embodiment of a reverse-rotating PCB board automatic laminating machine.

[0027] Figure 8 The figure is a schematic diagram of the connection relationship between the lateral laminating mechanism and part of the limiting mechanism in one embodiment of a counter-rotating PCB board automatic laminating machine.

[0028] Fig. 9 A schematic diagram of a partially exploded structure of an embodiment of a counter-rotating PCB board automatic laminating machine.

[0029] In the figure: 1. base; 2. fixed plate; 3. screw rod; 4. threaded sleeve; 5. baffle; 6. support plate; 7. guide sleeve; 8. guide rod; 9. motor; 10. transmission rod; 11. guide groove; 12. belt; 13. rotating roller; 14. fixed rod; 15. movable sleeve; 16. diamond block; 17. sliding plate; 18. sliding block; 19. rotating rod; 20. pressure roller; 21. limiting sleeve; 22. guide wheel; 23. gear; 24. guide groove; 25. rack plate; 26. guide rod; 27. limiting block; 28. tilting block; 29. ​​tilting rod; 30. receiving plate. DETAILED DESCRIPTION

[0030] 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.

[0031] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0032] See also Figures 1 to 9 In an embodiment of the present invention, a counter-rotating PCB board automatic laminating machine comprises a base 1, on which a symmetrically arranged fixing plate 2 is fixedly mounted, and a receiving plate 30 for holding a circuit board is also fixed on the base 1, characterized in that the counter-rotating PCB board automatic laminating machine further comprises:

[0033] The vertical film pressing mechanism is arranged on the fixed plate 2, and the vertical film pressing mechanism includes a vertical film pressing assembly and a rotating roller 13. The vertical film pressing assembly can drive the rotating roller 13 to perform film coating on the film placed on the receiving plate 30. The vertical film pressing assembly includes a screw rod 3 rotatably mounted on the fixed plate 2, and a threaded sleeve 4 that is threadably mounted on the screw rod 3 and is threadedly matched with the screw rod 3 is movably mounted on the screw rod 3, and a baffle 5 is fixed on the threaded sleeve 4. A guide structure connected to the baffle 5 is provided on the fixed plate 2, and the baffle 5 is rotatably connected to the rotating roller 13 and connected to the driving assembly, and the guide structure is connected to the lateral film pressing assembly and the limiting mechanism, wherein the guide structure includes a guide rod 8 fixedly mounted on the fixed plate 2, a guide sleeve 7 movably mounted on the guide rod 8, the baffle 5 is fixed on the guide sleeve 7, and a support plate 6 connected to the guide assembly and the limiting mechanism is fixed on the baffle 5.

[0034] See also Figure 1 , Figure 3-4 It should be noted that the circuit board is placed on the receiving plate 30, and the film is placed on the circuit board. In the initial state, the rotating roller 13 is separated from the film processing. At this time, the screw 3 rotates, driving the threaded sleeve 4 to move, thereby driving the baffle 5 to move. The baffle 5 will drive the guide sleeve 7 to move through the support plate 6, so that the guide sleeve 7 moves along the length direction of the guide rod 8. The guide rod 8 and the guide sleeve 7 have a guiding function, so that the threaded sleeve 4 moves along the length direction of the screw 3 and will not rotate with the screw 3. When the baffle 5 moves, it will also drive the rotating roller 13 to move. When the rotating roller 13 moves to the position where it fits with the film, under the action of the rotating roller 13, the circuit board is coated. When the rotating roller 13 moves to the film position, it will apply a certain pressure to the film. The size of the rotating roller 13 is slightly larger than the size of the film to ensure that the film is fully laminated.

[0035] A driving assembly is arranged on the base 1 and connected to the vertical film pressing assembly. The driving assembly can drive the rotating roller 13 to rotate when the vertical film pressing assembly moves. The driving assembly includes a motor 9 fixedly mounted on the baffle 5, a transmission rod 10 rotatably mounted on the baffle 5 and connected to the output shaft of the motor 9, and a belt 12 sleeved on the transmission rod 10 and connected to the rotating shaft of the rotating roller 13. The transmission rod 10 is connected to the horizontal film pressing assembly.

[0036] See also Figure 1 , Figure 3-6 Furthermore, in order to prevent bubbles or overlap in the film during the lamination process, a certain pre-tightening force needs to be applied to the film. When the rotating roller 13 moves from left to right along the length direction of the film, the rotating roller 13 can be driven to rotate counterclockwise to apply a certain pre-tightening force to the film. At this time, the motor 9 works, driving the transmission rod 10 to rotate, thereby driving the rotating roller 13 to rotate counterclockwise through the belt 12.

[0037] The fixed plate 2 is provided with a transverse film pressing mechanism connected to the driving assembly, the transverse film pressing mechanism includes a transverse film pressing assembly and a symmetrically arranged pressing roller 20, and the driving assembly can drive the two pressing rollers 20 to move closer to or away from each other through the transverse film pressing assembly. The transverse film pressing assembly includes a guide groove 11 opened on the transmission rod 10, a fixed rod 14 fixedly installed on the baffle 5, and a movable sleeve 15 movably installed on the fixed rod 14 and symmetrically arranged, and a rhombus block 16 engaged with the guide groove 11 is rotatably installed on the movable sleeve 15. The base 1 is provided with a movable sleeve 16 engaged with the movable sleeve 1 5; the sliding structure is connected to the limiting mechanism and the guide assembly and is fixedly connected to the pressure roller 20, the movable sleeve 15 is provided with a No. 1 limiting groove, and the fixed rod 14 is fixed with a No. 1 limiting rod engaged with the No. 1 limiting groove, wherein the sliding structure comprises a sliding plate 17 fixedly mounted on the movable sleeve 15, the sliding plate 17 is provided with a sliding groove, a sliding block 18 is slidably mounted in the sliding groove, a rotating rod 19 is rotatably mounted on the sliding block 18, the rotating rod 19 is fixedly connected to the pressure roller 20, and the rotating rod 19 is connected to the guide assembly and the limiting mechanism.

[0038] See also Figure 1 , Figure 3-6 , Figure 8-9, further speaking, when the rotating roller 13 rotates, a preload can be applied in the length direction of the film. In order to ensure that the film does not overlap or wrinkle in the width direction, a preload needs to be applied in the width direction of the film. When the transmission rod 10 rotates, the guide groove 11 is driven to rotate. The guide groove 11 can be divided into four sections. The first section is a first semi-annular groove, the second section is a first spiral groove connected to the first semi-annular groove, the third section is a second semi-annular groove connected to the first spiral groove, and the fourth section is a second spiral groove connected to the first semi-annular groove and the second semi-annular groove. The first spiral groove and the second spiral groove are arranged to cross each other. In the initial state, the diamond block 16 is located in the first semi-annular groove, and the two movable sleeves 15 are located at the end of the stroke in the direction of approaching each other, so that the two pressure rollers 20 are located at the end of the stroke in the position close to each other. When the guide groove 11 moves, the diamond block 16 is driven to enter the first spiral groove, so that the two movable sleeves 1 5 moves along the length direction of the fixed rod 14 and moves in the direction away from each other. Since the No. 1 limiting groove and the No. 1 limiting rod are engaged, it is ensured that the movable sleeve 15 will not deviate during the movement. The movable sleeve 15 will also drive the sliding plate 17 to move, and drive the sliding block 18 to move through the sliding groove, thereby driving the rotating rod 19 to move, so that the two pressing rollers 20 move in the direction away from each other. The pressing roller 20 will move along the width direction of the film to apply a certain pre-tightening force to the film to ensure that the film will not overlap in space. When the diamond block 16 moves into the second semi-annular groove, the pressing roller 20 moves to the end of the stroke, and the transmission rod 10 continues to rotate, so that the diamond block 16 enters the second spiral groove, so that the two pressing rollers 20 move in the direction of approaching each other. When the diamond block 16 returns to the first semi-annular groove, the pressing roller 20 returns to the initial position, and the above steps are repeated, thereby achieving the effect of driving the pressing roller 20 to reciprocate.

[0039] A guide assembly is arranged on the vertical film pressing assembly and connected to the horizontal film pressing assembly. The guide assembly can adjust the height of the pressing roller 20 when the horizontal film pressing assembly moves. The guide assembly includes a guide groove 24 opened on the support plate 6 and symmetrically arranged, a guide rod 26 rotatably mounted on the support plate 6, and a limit block 27 fixedly mounted on the support plate 6 and abutting against the guide rod 26. The guide groove 24 is engaged with the rotating rod 19.

[0040] See also Figure 1-4 , Figure 7, further speaking, the guide groove 24 can be divided into four sections, the first section is a short straight groove, the second section is an inclined groove connected to the short straight groove, the third section is a long straight groove connected to the inclined groove, and the fourth section is a vertical groove connected to the long straight groove and the short straight groove. The guide rod 26 is in a parallel position with the long straight groove and abuts against the limit block 27. In the initial state, the rotating rod 19 is located at the end of the stroke on one side of the short straight groove. At this time, the two pressure rollers 20 are located at the end of the stroke in the direction of approaching each other. When the movable sleeve 15 moves in a direction away from each other, the rotating rod 19 moves along the length direction of the short straight groove. When the rotating rod 19 moves into the inclined groove, the sliding block 18 is driven to move in the slide groove and move in a direction away from the base 1, so that the pressure roller 20 is separated from the film. When the rotating rod 19 moves to abut against the side of the guide rod 26 facing the base 1, When the rotating rod 19 is in the connecting position, the guide rod 26 is driven to rotate. When the rotating rod 19 disengages from the inclined groove and enters the long straight groove, the rotating rod 19 is separated from the guide rod 26. Under the action of gravity, the guide rod 26 abuts against the limit block 27 again. When the rotating rod 19 moves to the end of the stroke on one side of the long straight groove, the movable sleeve 15 moves to the end of the stroke. At this time, the movable sleeve 15 will move in the direction of approaching each other. When the rotating rod 19 moves to the abutment position with the other side of the guide rod 26, under the action of the limit block 27, it is ensured that the rotating rod 19 will not disengage from the long straight groove. When the rotating rod 19 moves into the vertical groove, under the action of gravity, the sliding block 18 returns to the initial position, and the above steps are repeated, thereby achieving the purpose of controlling the pressure roller 20 to abut against the film when moving in the direction away from each other, and to separate from the film when moving towards each other.

[0041] The base 1 is provided with a limiting mechanism connected with the transverse film pressing assembly and the vertical film pressing assembly, and the limiting mechanism is used to control the intermittent rotation of the pressing roller 20 through the transverse film pressing assembly, and the limiting mechanism includes a tilting block 28 and a tilting rod 29 fixedly mounted on the support plate 6 and symmetrically arranged, a toothing assembly arranged on the support plate 6 and connected with the rotating rod 19, and a guide wheel 22 fixedly mounted on the toothing assembly and symmetrically arranged, and the guide wheel 22 cooperates with the tilting block 28 and the tilting rod 29, wherein the toothing assembly includes a limiting sleeve 21 movably mounted on the rotating rod 19, a gear 23 fixedly mounted on the limiting sleeve 21, and a rack plate 25 fixedly mounted on the support plate 6 and meshing with the gear 23, the limiting sleeve 21 is fixedly connected to the guide wheel 22, a No. 2 limiting groove is opened on the limiting sleeve 21, and a No. 2 limiting rod engaged with the No. 2 limiting groove is fixed on the rotating rod 19.

[0042] See also Figure 1-4 , Figure 7-9Finally, in order to increase the preload force on the film, it is necessary to drive the pressure roller 20 to rotate. In the initial state, the rotating rod 19 is located at the end of the stroke on one side of the short straight groove. At this time, the limiting sleeve 21 is located at the end of the stroke in the direction of the guide groove 24, and the gear 23 and the rack plate 25 are in a matching position. When the rotating rod 19 moves along the length direction of the short straight groove, the gear 23 is driven to move. When the gear 23 moves to the meshing position with the rack plate 25, the rotating rod 19 is driven to rotate by the gear 23, thereby driving the pressure roller 20 to rotate. When the gear 23 and the rack plate 25 are separated, the guide wheel 22 moves to the abutment position with the tilting block 28, so that the limiting sleeve 21 moves in the direction away from the guide groove 24, thereby ensuring the relative position between the gear 23 and the rack plate 25. The gear 23 is changed to ensure that the gear 23 does not interfere with the rack plate 25. When the rotating rod 19 enters the long straight groove and moves toward the vertical groove, and when the gear 23 moves to the misaligned position with the rack plate 25, the guide wheel 22 moves to the abutment position with the tilting rod 29, and under the action of the tilting rod 29, the limiting sleeve 21 moves toward the guide groove 24 again, so that the gear 23 returns to the matching position with the rack plate 25 again, and the above steps are repeated to ensure that when the height of the pressure roller 20 changes, the rack plate 25 does not interfere with the gear 23. When the gear 23 is separated from the rack plate 25, the guide wheel 22 on the limiting sleeve 21 just moves to the matching position with the limiting block 27 and the tilting rod 29, ensuring that the limiting sleeve 21 can move to the desired position.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A counter-rotating PCB board automatic laminating machine, comprising a base (1), on which a symmetrically arranged fixing plate (2) is fixedly mounted, and a receiving plate (30) for holding a circuit board is also fixed on the base (1), characterized in that: The counter-rotating PCB board automatic laminating machine also includes: A vertical film pressing mechanism is arranged on the fixed plate (2), the vertical film pressing mechanism comprising a vertical film pressing component and a rotating roller (13), the vertical film pressing component can drive the rotating roller (13) to perform film lamination on the film placed on the receiving plate (30); A driving assembly is arranged on the base (1) and connected to the vertical film pressing assembly, the driving assembly can drive the rotating roller (13) to rotate when the vertical film pressing assembly moves, the fixed plate (2) is provided with a transverse film pressing mechanism connected to the driving assembly, the transverse film pressing mechanism comprises a transverse film pressing assembly and symmetrically arranged pressing rollers (20), and the driving assembly can drive the two pressing rollers (20) to move towards or away from each other through the transverse film pressing assembly; A guide assembly is arranged on the vertical film pressing assembly and connected to the horizontal film pressing assembly, the guide assembly can adjust the height of the pressing roller (20) when the horizontal film pressing assembly moves, and a limiting mechanism connected to the horizontal film pressing assembly and the vertical film pressing assembly is arranged on the base (1), the limiting mechanism is used to control the intermittent rotation of the pressing roller (20) through the horizontal film pressing assembly; The vertical film pressing assembly comprises a screw (3) rotatably mounted on the fixed plate (2); a threaded sleeve (4) threadably mounted on the screw (3) and threadedly matched with the screw (3); a baffle (5) is fixed on the threaded sleeve (4); a guide structure connected to the baffle (5) is provided on the fixed plate (2); the baffle (5) is rotatably connected to the rotating roller (13) and connected to the driving assembly; the guide structure is connected to the horizontal film pressing assembly and the limiting mechanism; The driving assembly comprises a motor (9) fixedly mounted on the baffle (5), a transmission rod (10) rotatably mounted on the baffle (5) and connected to the output shaft of the motor (9), and a belt (12) sleeved on the transmission rod (10) and connected to the rotating shaft of the rotating roller (13); the transmission rod (10) is connected to the transverse film pressing assembly; The transverse film pressing assembly comprises a guide groove (11) provided on the transmission rod (10), a fixed rod (14) fixedly mounted on the baffle (5), and a movable sleeve (15) movably mounted on the fixed rod (14) and symmetrically arranged, a rhombus block (16) engaged with the guide groove (11) being rotatably mounted on the movable sleeve (15), and a sliding structure connected with the movable sleeve (15) being arranged on the base (1); The sliding structure is connected to the limiting mechanism and the guide assembly and is fixedly connected to the pressure roller (20); a first limiting groove is provided on the movable sleeve (15); and a first limiting rod engaged with the first limiting groove is fixed on the fixed rod (14); The guide structure comprises a guide rod (8) fixedly mounted on the fixed plate (2), a guide sleeve (7) movably mounted on the guide rod (8), the baffle plate (5) being fixed on the guide sleeve (7), and a support plate (6) connected to the guide assembly and the limiting mechanism being fixed on the baffle plate (5); The guide assembly comprises a guide groove (24) opened on the support plate (6) and arranged symmetrically, a guide rod (26) rotatably mounted on the support plate (6), and a limit block (27) fixedly mounted on the support plate (6) and abutting against the guide rod (26), wherein the guide groove (24) is engaged with the rotating rod (19).

2. The reverse-rotating PCB board automatic laminating machine according to claim 1, characterized in that: The sliding structure comprises a sliding plate (17) fixedly mounted on the movable sleeve (15), the sliding plate (17) being provided with a sliding groove, a sliding block (18) being slidably mounted in the sliding groove, a rotating rod (19) being rotatably mounted on the sliding block (18), the rotating rod (19) being fixedly connected to the pressure roller (20), and the rotating rod (19) being connected to the guide assembly and the limiting mechanism.

3. The reverse-rotating PCB board automatic laminating machine according to claim 2, characterized in that: The limiting mechanism comprises a tilting block (28) and a tilting rod (29) fixedly mounted on the support plate (6) and symmetrically arranged, a toothing assembly arranged on the support plate (6) and connected to the rotating rod (19), and a guide wheel (22) fixedly mounted on the toothing assembly and symmetrically arranged, the guide wheel (22) cooperating with the tilting block (28) and the tilting rod (29).

4. The reverse-rotating PCB board automatic laminating machine according to claim 3, characterized in that: The gearing assembly comprises a limiting sleeve (21) movably mounted on the rotating rod (19), a gear (23) fixedly mounted on the limiting sleeve (21), and a rack plate (25) fixedly mounted on the supporting plate (6) and meshing with the gear (23); the limiting sleeve (21) is fixedly connected to the guide wheel (22); a second limiting groove is formed on the limiting sleeve (21); and a second limiting rod engaged with the second limiting groove is fixed on the rotating rod (19).

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