A constant pressure buffer plate mechanism for a PCB board laminating machine
By using the pressing, venting, and rolling components of the constant pressure buffer plate mechanism, the problem of air residue between PCB boards during pressing is solved, achieving uniform adhesive distribution and stable layer positions, thus improving the pressing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN BAO JIAN ELECTRONIC TECH LTD CO
- Filing Date
- 2026-04-23
- Publication Date
- 2026-06-02
AI Technical Summary
When existing laminating machines laminate PCB boards, air can easily accumulate between adjacent layers, leading to uneven distribution of adhesive and affecting the lamination effect.
The constant pressure buffer plate mechanism includes a pressing assembly, an air venting assembly, an anti-deviation assembly, and a rolling assembly. The pressure plate is driven to move downward by a hydraulic cylinder, the pressing roller rolls to vent air, the buffer spring and damper buffer, the guide block limits the movement, and the roller reduces friction, so as to achieve effective pressing between the layers and air removal.
It improves the lamination effect of PCB boards, prevents uneven distribution of adhesive caused by air residue, ensures stable layer positions, and enhances lamination quality.
Smart Images
Figure CN122138341A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laminating machines, and more particularly to a constant pressure buffer plate mechanism for a PCB board laminating machine. Background Technology
[0002] Multilayer PCBs refer to multi-layer circuit boards used in electrical products. Multilayer boards use more single-sided or double-sided wiring boards. A printed circuit board with one double-sided inner layer and two single-sided outer layers, or two double-sided inner layers and two single-sided outer layers, is formed by alternating layers of the board through a positioning system and insulating adhesive materials, with the conductive patterns interconnected according to design requirements. This is called a four-layer or six-layer printed circuit board, also known as a multilayer printed circuit board. When processing multilayer printed circuit boards, a laminating machine is required to process the PCB board.
[0003] A search revealed Chinese patent application CN210183667U, which discloses a multi-level buffer plate mechanism for a multi-layer circuit board. The mechanism includes a power mechanism, a pressure plate, a pressure seat, a primary buffer mechanism, an adjusting buffer mechanism, a support, and a secondary buffer mechanism. The power mechanism includes a hydraulic cylinder, the bottom of which is fixedly connected to the top of the pressure plate. The pressure plate is fixedly mounted on an upper slide, which is connected to the pressure seat via an upper guide rod. The top of the pressure seat has a pressure mold that mates with the pressure plate, and a support is located below the pressure seat. A primary buffer mechanism and an adjusting buffer mechanism are located between the pressure seat and the support. The secondary buffer mechanism includes a rubber column and a limiting column. The rubber column is located between the support and the platform, and its upper and lower ends are fixed. This invention employs a multi-level buffer mechanism, utilizing the reaction force of the buffer mechanism to equalize the pressure on the circuit board, causing the pressure on the circuit board to gradually change over a wide range, thus prolonging the pressing process and improving the pressing effect.
[0004] When existing pressing mechanisms press PCB boards, they usually squeeze the PCB boards from top to bottom. However, during the squeezing process, air may be present between adjacent layers, which can lead to uneven distribution of adhesive between the layers and thus affect the pressing effect of the PCB boards. Summary of the Invention
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A constant pressure buffer plate mechanism for a PCB board pressing machine includes a base, a conveyor belt, support plates fixed on both sides of the base, and a pressing assembly. The conveyor belt is mounted on the base, and a fixed plate is connected between the two support plates. The pressing assembly includes a hydraulic cylinder, a support plate, and a pressing plate. The hydraulic cylinder is fixed on the fixed plate, and its extended end is connected to the support plate. A buffer spring is connected between the pressing plate and the support plate, and a damper is provided inside the buffer spring. An exhaust assembly is provided at the bottom of the pressing plate. The exhaust assembly includes two supports, two swing frames, a pressing plate, and two pressing rollers. The supports are fixed on both sides of the bottom of the pressing plate. The swing frames are rotatably connected to the supports and are arranged in a figure-eight shape. The pressing rollers are rotatably connected to the swing frames. A return spring is connected between the top of the pressing plate and the pressing plate. The two sides of the pressing plate are attached to the two swing frames. When one end of the swing frame deflects to one side, its other end pushes the pressing plate downward until the pressing roller and the pressing plate are on the same plane.
[0006] Preferably, the conveyor belt includes a pad, two supports, a connecting plate, a rotating rod, a rotating roller, a connecting belt, and a conveyor motor. The pad is fixed to the base by the supports, the connecting plate is fixed to the pad, the rotating rod is rotatably connected to the connecting plate, the rotating roller is fixedly sleeved on the rotating rod, the two rotating rollers are rotatably connected to the connecting belt, the connecting belt is in contact with the pad, and the conveyor motor is fixed to one side of the connecting plate, with its output end fixedly connected to one of the rotating rods.
[0007] Preferably, a guide opening is provided through one side of each of the two support plates, and a guide block is slidably connected to the inner wall of the guide opening, the guide block being fixed to one side of the support plate.
[0008] Preferably, anti-deviation components are provided on both sides of the base to limit the pressing of the PCB board.
[0009] Preferably, the anti-deviation assembly includes a buffer pad, a side plate, a limiting plate, a sleeve, a piston, and a push rod. The side plate is fixed on the base, the sleeve is fixed on one side of the side plate, the piston is slidably connected inside the sleeve, one end of the push rod is connected to one side of the piston, and the other end is connected to the limiting plate. A piston spring is provided between the piston and the sleeve, and a conduit is provided between the buffer pad and the sleeve.
[0010] Preferably, a rolling assembly is provided on one side of the base, and the rolling assembly is fitted with the conveyor belt.
[0011] Preferably, the rolling assembly includes two rolling plates, a connecting seat, a connecting frame, a roller, and a transmission component. The two rolling plates are fixed on the support, and each of the two rolling plates has a through-hole on one side. A sliding plate is slidably connected to the inner wall of the sliding hole, and a sliding plate spring is provided between one side of the sliding plate and the sliding hole. The two sides of the connecting seat are connected to the two sliding plates. The connecting frame is connected to the connecting seat through an electric push rod. The roller is rotatably connected to the connecting frame, and the conveyor belt is connected to the sliding plate through the transmission component.
[0012] Preferably, the transmission component includes a connecting shaft, two pulleys, a belt, two rotating shafts, a half gear, a driven wheel, and a rack. The connecting shaft is fixed to one side of the rotating rod. Both rotating shafts are rotatably connected to the rolling plate. One pulley is fixedly sleeved on the connecting shaft, and the other pulley is fixedly sleeved on one of the rotating shafts. The two pulleys are rotatably connected to the belt. The half gear is fixedly sleeved on one of the rotating shafts, and the driven wheel is fixedly sleeved on the other rotating shaft. The half gear meshes with the driven wheel. One side of the slide plate is connected to the rack, and the driven wheel meshes with the rack.
[0013] Preferably, the top of the fixing plate has a through hole, the hydraulic cylinder is fixed in the through hole, the protruding end of the hydraulic cylinder is fixed to the support plate by bolts, and the buffer spring is welded between the pressure plate and the support plate.
[0014] Preferably, the bracket is fixed to both sides of the bottom of the pressure plate by bolts, the swing frame is rotatably connected to the bracket by bearings, the pressing roller is rotatably connected to the swing frame by bearings, and the two sides of the pressing plate are attached to the two swing frames.
[0015] The beneficial effects of this invention are as follows: 1. This invention, through the setting of a pressing component and an venting component, allows the PCB board to be placed on a conveyor belt during the pressing process. The conveyor belt moves the PCB board, and when it moves to below the pressing component, the hydraulic cylinder is activated, which drives the pressure plate downward, thereby pressing the PCB board. During this process, the setting of buffer springs and dampers effectively buffers the pressing of the PCB board. As the pressure plate moves downward, the pressing rollers act on the PCB board, and the swing frame drives the pressing rollers to roll on the surface of the PCB board under pressure. Thus, the rolling of the two pressing rollers not only presses the adjacent layers but also removes air between the two layers, thereby improving the pressing effect of the PCB board and preventing uneven glue distribution caused by air residue between the two layers, which would affect the pressing effect of the PCB board. 2. In this invention, the pressing assembly and anti-deviation assembly are configured so that when the PCB board is pressed by the pressing assembly, the support plate will drive the guide block to slide downward. At this time, the guide block will squeeze the buffer pad when it slides. The buffer pad can further buffer the pressing of the PCB board. In addition, after the buffer pad is squeezed, the gas inside it will be transported to the inside of the sleeve through the conduit. The air pressure inside the sleeve will increase with the input of gas. The piston will push the push rod to slide to one side under the action of air pressure. At this time, the limiting plate will act on both sides of the PCB board to limit the position of multiple layers, so as to improve the pressing effect of the PCB board and prevent displacement between layers due to pressure and adhesive sliding during the pressing process, so as to cause misalignment of the layers during pressing and thus affect the pressing effect of the PCB board. 3. The present invention, through the setting of the rolling assembly, when the PCB board is conveyed by the conveyor belt, the two pulleys and the belt cooperate to drive the shaft to rotate the half gear. When the half gear rotates, it meshes with the driven wheel. When the driven wheel is meshed, it rotates. At this time, the rack drives the roller to move under the action of the driven wheel. The direction of the roller's movement is opposite to the direction of the conveyor belt. Therefore, when the roller acts on the PCB board, the pressure on the PCB board will increase. The rotation of the roller can reduce the friction between the roller and the PCB board, thereby preventing displacement between the layers due to the action of the roller. When the roller rolls, it can further exhaust the air between the layers, thereby further improving the pressing effect of the PCB board. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the constant pressure buffer plate mechanism of a PCB board laminating machine proposed in this invention; Figure 2 This is a schematic diagram of the conveyor belt structure of the constant pressure buffer platen mechanism of a PCB board laminating machine proposed in this invention; Figure 3 This is a partial structural schematic diagram of the constant pressure buffer plate mechanism of a PCB board laminating machine proposed in this invention; Figure 4 This is a schematic diagram of the main structure of the pressing component of the constant pressure buffer plate mechanism of the PCB board pressing machine proposed in this invention. Figure 5 This is a schematic diagram of the pressing component structure of the constant pressure buffer plate mechanism of the PCB board pressing machine proposed in this invention; Figure 6 This is a schematic diagram of the anti-deviation component structure of the constant pressure buffer platen mechanism of a PCB board laminating machine proposed in this invention; Figure 7 for Figure 6The structural diagram at point A is presented in the text; Figure 8 This is a schematic diagram of the rolling assembly structure of the constant pressure buffer platen mechanism of a PCB board laminating machine proposed in this invention; Figure 9 This is a schematic diagram of the transmission structure of the constant pressure buffer plate mechanism of a PCB board pressing machine proposed in this invention.
[0017] In the attached diagram: 1. Base; 2. Support plate; 3. Conveyor belt; 4. Pressing assembly; 5. Rolling assembly; 6. Pad plate; 7. Support; 8. Connecting plate; 9. Rotating rod; 10. Rotating roller; 11. Connecting belt; 12. Conveyor motor; 13. Exhaust assembly; 14. Guide port; 15. Fixing plate; 16. Anti-deviation assembly; 17. Hydraulic cylinder; 18. Support plate; 19. Guide block; 20. Damper; 21. Buffer spring; 22. Pressure plate; 23. Bracket; 24. Swing frame; 25. 26. Return spring; 27. Pressing plate; 28. Pressing roller; 29. Buffer pad; 30. Side plate; 31. Limiting plate; 32. Sleeve; 33. Piston; 34. Piston spring; 35. Push rod; 36. Rolling plate; 37. Slide; 38. Slide spring; 39. Connecting seat; 40. Connecting frame; 41. Roller; 42. Transmission component; 43. Connecting shaft; 44. Pulley; 45. Belt; 46. Rotating shaft; 47. Half gear; 48. Driven wheel; 49. Rack. Detailed Implementation
[0018] Example 1, referring to Figures 1-5A constant pressure buffer plate mechanism for a PCB board pressing machine includes a base 1, a conveyor belt 3, support plates 2 fixed on both sides of the base 1, and a pressing assembly 4. The conveyor belt 3 is mounted on the base 1 and is used to transport the PCB board during pressing. The support plates 2 are bolted to the base 1, and a fixing plate 15 is bolted between the two support plates 2. The pressing assembly 4 includes a hydraulic cylinder 17, a support plate 18, and a pressure plate 22. A through hole is provided at the top of the fixing plate 15, and the hydraulic cylinder 17 is fixed in the through hole. One end of the hydraulic cylinder 17 is bolted to the support plate 18. A buffer spring 21 is welded between the pressure plate 22 and the support plate 18. A damper 20 is provided inside the buffer spring 21. An exhaust assembly 13 is provided at the bottom of the pressure plate 22. Component 13 consists of two supports 23, two swing frames 24, a pressing plate 26, and two pressing rollers 27. The supports 23 are fixed to both sides of the bottom of the pressing plate 22 by bolts. The swing frames 24 are rotatably connected to the supports 23 by bearings. The two swing frames 24 are arranged in a V-shape. The pressing rollers 27 are rotatably connected to the swing frames 24 by bearings. A return spring 25 is welded between the top of the pressing plate 26 and the pressing plate 22. The two sides of the pressing plate 26 are attached between the two swing frames 24. When one end of the swing frame 24 deflects to one side, its other end will push the pressing plate 26 downward until the pressing rollers 27 and the pressing plate 26 are on the same plane. The pressing effect of the PCB board is improved by the cooperation of the pressing rollers 27 and the pressing plate 26.
[0019] During the PCB board lamination process, the PCB board is placed on the conveyor belt 3, which moves the PCB board. When it moves to below the lamination assembly 4, the hydraulic cylinder 17 is activated, which moves the pressure plate 22 downward, thus laminating the PCB board. During this process, the buffer spring 21 and damper 20 effectively buffer the lamination of the PCB board. As the pressure plate 22 moves downward, the lamination roller 27 acts on the PCB board, and the swing frame 24 drives the lamination roller 27 to roll on the surface of the PCB board under pressure. The rolling of the two lamination rollers 27 not only laminates the adjacent layers but also removes air between the two layers, thereby improving the lamination effect of the PCB board and preventing uneven glue distribution caused by air residue between the two layers, which would affect the lamination effect of the PCB board.
[0020] In this invention, the conveyor belt 3 includes a pad 6, two supports 7, a connecting plate 8, a rotating rod 9, a rotating roller 10, a connecting belt 11, and a conveyor motor 12. The pad 6 is fixed to the base 1 by the supports 7. The connecting plate 8 is fixed to the pad 6 by bolts. The rotating rod 9 is rotatably connected to the connecting plate 8 by bearings. The rotating roller 10 is fixedly sleeved on the rotating rod 9. The two rotating rollers 10 are rotatably connected to the connecting belt 11. The connecting belt 11 is in contact with the pad 6. The conveyor motor 12 is fixed to one side of the connecting plate 8 by bolts. One end of the conveyor motor 12 is fixedly connected to one of the rotating rods 9. When conveying the PCB board, the conveyor motor 12 is started, and the conveyor motor 12 drives the rotating roller 10 to rotate, thereby causing the connecting belt 11 to move the PCB board.
[0021] Based on the above, in order to improve the stability of the movement of the support plate 18, a guide port 14 is provided through one side of the two support plates 2. A guide block 19 is slidably connected to the inner wall of the guide port 14. The guide block 19 is fixed to one side of the support plate 18 by bolts, which is used to improve the stability of the pressing assembly 4 pressing the PCB board and improve the pressing effect of the PCB board.
[0022] Example 2, refer to Figures 1-7 A constant pressure buffer plate mechanism for a PCB board pressing machine, compared with Embodiment 1, has anti-deviation components 16 on both sides of the base 1 to limit the pressing of the PCB board.
[0023] Based on the above, the anti-deviation assembly 16 includes a buffer pad 28, a side plate 29, a limiting plate 30, a sleeve 31, a piston 32, and a push rod 34. The buffer pad 28 is disposed between the guide block 19 and the guide port 14. The side plate 29 is fixed to the base 1 by bolts. The sleeve 31 is bolted to one side of the side plate 29. The piston 32 is slidably connected inside the sleeve 31. One end of the push rod 34 is bolted to one side of the piston 32, and the other end is bolted to the limiting plate 30. A piston spring 33 is disposed between the piston 32 and the sleeve 31. A guide tube is disposed between the buffer pad 28 and the sleeve 31.
[0024] When the PCB board is pressed by the pressing assembly, the support plate 18 drives the guide block 19 to slide downward. At this time, the guide block 19 will squeeze the buffer pad 28 when it slides. The buffer pad 28 can further buffer the pressing of the PCB board. In addition, after the buffer pad 28 is squeezed, the gas inside it will be transported to the inside of the sleeve 31 through the conduit. The air pressure inside the sleeve 31 will increase with the input of gas. The piston 32 will push the push rod 34 to slide to one side under the action of air pressure. At this time, the limiting plate 30 will act on both sides of the PCB board to limit the position of multiple layers, so as to improve the pressing effect of the PCB board and prevent displacement between layers due to pressure and adhesive sliding during the pressing process, so as to cause misalignment of the layers during pressing and thus affect the pressing effect of the PCB board.
[0025] Example 3, referring to Figures 1-9 A constant pressure buffer plate mechanism for a PCB board pressing machine, compared with Embodiment 1, is provided with a rolling assembly 5 on one side of the base 1, and the rolling assembly 5 and the conveyor belt 3 are in cooperation.
[0026] Based on the above, the rolling assembly 5 includes two rolling plates 35, a connecting seat 39, a connecting frame 40, a roller 41, and a transmission component 42. The two rolling plates 35 are fixed to the support 7 by bolts. A sliding opening 36 is provided through one side of each of the two rolling plates 35. A sliding plate 37 is slidably connected to the inner wall of the sliding opening 36. A sliding plate spring 38 is provided between one side of the sliding plate 37 and the sliding opening 36. The two sides of the connecting seat 39 are connected to the two sliding plates 37 by bolts. The connecting frame 40 is connected to the connecting seat 39 by an electric push rod. The roller 41 is rotatably connected to the connecting frame 40 by a bearing. The conveyor belt 3 is connected to the sliding plate 37 by the transmission component 42.
[0027] Based on the above, the transmission component 42 consists of a connecting shaft 43, two pulleys 44, a belt 45, two rotating shafts 46, a half gear 47, a driven wheel 48, and a rack 49. The connecting shaft 43 is fixed to one side of the rotating rod 9. Both rotating shafts 46 are rotatably connected to the rolling plate 35 through bearings. One pulley 44 is fixedly sleeved on the connecting shaft 43, and the other pulley 44 is fixedly sleeved on one of the rotating shafts 46. The two pulleys 44 are rotatably connected to the belt 45. The half gear 47 is fixedly sleeved on one of the rotating shafts 46, and the driven wheel 48 is fixedly sleeved on the other rotating shaft 46. When the half gear 47 rotates, it meshes with the driven wheel 48. One side of the sliding plate 37 is connected to the rack 49 by bolts, and the driven wheel 48 meshes with the rack 49.
[0028] When the PCB board is conveyed by the conveyor belt 3, the engagement between the two pulleys 44 and the belt 45 causes the shaft 46 to drive the half gear 47 to rotate. When the half gear 47 rotates, it meshes with the driven wheel 48. When the driven wheel 48 is meshed, it rotates. At this time, the rack 49 drives the roller 41 to move under the action of the driven wheel 48. The direction of movement of the roller 41 is opposite to the direction of the conveyor belt 3. Therefore, when the roller 41 acts on the PCB board, the pressure on the PCB board will increase. The rotation of the roller 41 can reduce the friction between the roller 41 and the PCB board, thereby preventing displacement between the layers due to the action of the roller 41. When the roller 41 rolls, it can further exhaust the air between the layers, thereby further improving the pressing effect of the PCB board.
[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A constant pressure buffer platen mechanism for a PCB board pressing machine, comprising a base (1), a conveyor belt (3), support plates (2) fixed on both sides of the base (1), and a pressing assembly (4), wherein the conveyor belt (3) is disposed on the base (1), characterized in that, A fixed plate (15) is connected between the two support plates (2). The pressing assembly (4) includes a hydraulic cylinder (17), a support plate (18), and a pressure plate (22). The hydraulic cylinder (17) is fixed on the fixed plate (15), and its extended end is connected to the support plate (18). A buffer spring (21) is connected between the pressure plate (22) and the support plate (18). A damper (20) is provided inside the buffer spring (21). An exhaust assembly (13) is provided at the bottom of the pressure plate (22). The exhaust assembly (13) includes two supports (23), two swing frames (24), a pressing plate (26), and two pressing rollers (27). The supports (23) are fixed on both sides of the bottom of the pressing plate (22). The swing frames (24) are rotatably connected to the supports (23). The two swing frames (24) are arranged in a figure-eight shape. The pressing rollers (27) are rotatably connected to the swing frames (24). A return spring (25) is connected between the top of the pressing plate (26) and the pressing plate (22). The two sides of the pressing plate (26) are attached between the two swing frames (24). When one end of the swing frame (24) deflects to one side, its other end pushes the pressing plate (26) downward until the pressing rollers (27) and the pressing plate (26) are on the same plane.
2. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, The conveyor belt (3) includes a pad (6), two supports (7), a connecting plate (8), a rotating rod (9), a rotating roller (10), a connecting belt (11), and a conveyor motor (12). The pad (6) is fixed on the base (1) by the supports (7). The connecting plate (8) is fixed on the pad (6). The rotating rod (9) is rotatably connected to the connecting plate (8). The rotating roller (10) is fixedly sleeved on the rotating rod (9). The two rotating rollers (10) are rotatably connected to the connecting belt (11). The connecting belt (11) is in contact with the pad (6). The conveyor motor (12) is fixed on one side of the connecting plate (8), and its output end is fixedly connected to one of the rotating rods (9).
3. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, One side of each of the two support plates (2) is provided with a guide opening (14), and a guide block (19) is slidably connected to the inner wall of the guide opening (14). The guide block (19) is fixed to one side of the support plate (18).
4. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, The base (1) is provided with anti-deviation components (16) on both sides to limit the pressing of the PCB board.
5. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 4, characterized in that, The anti-deviation assembly (16) includes a buffer pad (28), a side plate (29), a limiting plate (30), a sleeve (31), a piston (32), and a push rod (34). The side plate (29) is fixed on the base (1), the sleeve (31) is fixed on one side of the side plate (29), the piston (32) is slidably connected inside the sleeve (31), one end of the push rod (34) is connected to one side of the piston (32), and the other end is connected to the limiting plate (30). A piston spring (33) is provided between the piston (32) and the sleeve (31), and a conduit is provided between the buffer pad (28) and the sleeve (31).
6. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, A rolling assembly (5) is provided on one side of the base (1), and the rolling assembly (5) and the conveyor belt (3) are in cooperation.
7. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 6, characterized in that, The rolling assembly (5) includes two rolling plates (35), a connecting seat (39), a connecting frame (40), a roller (41), and a transmission component (42). The two rolling plates (35) are fixed on the support (7). A sliding opening (36) is provided on one side of each of the two rolling plates (35). A sliding plate (37) is slidably connected to the inner wall of the sliding opening (36). A sliding plate spring (38) is provided between one side of the sliding plate (37) and the sliding opening (36). The two sides of the connecting seat (39) are connected to the two sliding plates (37). The connecting frame (40) is connected to the connecting seat (39) through an electric push rod. The roller (41) is rotatably connected to the connecting frame (40). The conveyor belt (3) is connected to the sliding plate (37) through the transmission component (42).
8. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 7, characterized in that, The transmission component (42) includes a connecting shaft (43), two pulleys (44), a belt (45), two rotating shafts (46), a half gear (47), a driven wheel (48), and a rack (49). The connecting shaft (43) is fixed to one side of the rotating rod (9). Both rotating shafts (46) are rotatably connected to the rolling plate (35). One pulley (44) is fixedly sleeved on the connecting shaft (43), and the other pulley (44) is fixedly sleeved on one of the rotating shafts (46). The two pulleys (44) are rotatably connected to the belt (45). The half gear (47) is fixedly sleeved on one of the rotating shafts (46), and the driven wheel (48) is fixedly sleeved on the other rotating shaft (46). The half gear (47) meshes with the driven wheel (48). One side of the sliding plate (37) is connected to the rack (49), and the driven wheel (48) meshes with the rack (49).
9. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, The top of the fixed plate (15) has a through hole, the hydraulic cylinder (17) is fixed in the through hole, the extended end of the hydraulic cylinder (17) is fixed to the support plate (18) by bolts, and the buffer spring (21) is welded between the pressure plate (22) and the support plate (18).
10. The constant pressure buffer plate mechanism of a PCB board laminating machine according to claim 1, characterized in that, The bracket (23) is fixed to both sides of the bottom of the pressure plate (22) by bolts. The swing frame (24) and the bracket (23) are rotatably connected by bearings. The pressing roller (27) is rotatably connected to the swing frame (24) by bearings. The two sides of the pressing plate (26) are attached between the two swing frames (24).