PCB automatic dry film pressing line

Abstract

The invention relates to the technical field of PCB (Printed Circuit Board) processing, in particular to a PCB processing device which comprises a rack, and a conveying line is arranged on the rack; a feeding device, a dust removal device, a dry film pressing device, an airing and turning device and a discharging device are sequentially arranged on the machine frame in the conveying direction of the conveying line, the discharging device comprises a driver and an L-shaped frame, the two sides of one end of the L-shaped frame can be rotationally installed on the machine frame, and the driver is installed on the machine frame and is in transmission connection with the rotating center of the L-shaped frame; the driver can drive the swinging end of the L-shaped frame to swing to be horizontal and to be lapped on the discharging end of the conveying line, the back face of the L-shaped frame in the horizontal state can bear a PCB, a limiting hook block is arranged at the end, away from the discharging end of the conveying line, of the back face of the L-shaped frame, and the limiting hook block can contain and limit the corresponding side edge of the PCB; a plate bearing mechanism is slidably arranged on the rack and located in front of discharging of the conveying line. According to the automatic dry film pressing line for the PCB, the blanking stability can be improved, and the film pressing quality and the production efficiency are ensured.

Description

Technical Field

[0001] This invention relates to the field of PCB processing technology, and more specifically to an automatic dry film pressing line for PCB boards. Background Technology

[0002] In the PCB manufacturing industry, a special solid photosensitive polymer film, commonly referred to as dry film, is typically laminated onto the surface of the PCB using a hot-pressing process. This film undergoes a chemical reaction under ultraviolet light, forming a protective layer for the circuit patterns during subsequent development processes, which are then used in subsequent etching or electroplating steps.

[0003] Current PCB dry film lamination production lines are typically composed of multiple independent machines. The coordination between processes such as feeding, dust removal, lamination, flipping and cooling, and unloading often requires manual assistance. This not only results in low production efficiency but also easily leads to secondary contamination of the PCB surface during manual intervention, affecting lamination quality. Furthermore, existing production lines mostly use horizontal conveying for unloading. When laminated PCBs are stacked horizontally, the dry film is not yet fully set, making it prone to adhesion and scratching, leading to dry film damage. Therefore, vertical stacking is generally used. Although some manufacturers have attempted to use robotic arms for vertical PCB loading, issues such as uneven PCB transfer and poor positioning results can lead to PCB slippage and misalignment. Additionally, the stacked PCBs have low uniformity, increasing the workload for subsequent finishing.

[0004] To address the aforementioned issues, there is an urgent need to design an integrated automated dry film lamination line for PCB boards, enabling automated connection of each process, improving the stability and uniformity of material cutting, and ensuring lamination quality and production efficiency. Summary of the Invention

[0005] In order to overcome one of the shortcomings of the prior art, the purpose of this invention is to provide an automatic dry film laminating line for PCB boards. This automatic dry film laminating line for PCB boards can improve the stability of material feeding and ensure laminating quality and production efficiency.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] An automatic dry film laminating line for PCB boards includes a frame with a conveyor line mounted on it. Along the conveying direction of the conveyor line, the frame is sequentially equipped with a feeding device, a dust removal device, a dry film laminating device, a cooling and turning device, and a discharging device. The discharging device includes a driver and an L-shaped frame. Both sides of one end of the L-shaped frame are rotatably mounted on the frame. The driver is mounted on the frame and is connected to the rotation center of the L-shaped frame. The driver can drive one swinging end of the L-shaped frame to a horizontal position and place it on the discharge end of the conveyor line. In the horizontal state, the back of the L-shaped frame... The L-shaped frame is capable of receiving PCB boards. A limiting hook block is provided on the back of the L-shaped frame away from the discharge end of the conveyor line. The limiting hook block can accommodate and restrict the corresponding side of the PCB board. A support plate mechanism is slidably provided in front of the discharge end of the conveyor line. The support plate mechanism can be close to or away from the discharge end of the conveyor line. When the driver drives the L-shaped frame and the PCB board on its back to change from a horizontal state to a vertical state, the receiving end of the support plate mechanism can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block and receive the PCB board.

[0008] In some possible implementations, the plate support mechanism includes a perforated frame mounted on the frame, a sliding platform slidably mounted on the perforated frame, and a plate receiving seat mounted on the sliding platform. The sliding platform can be close to or away from the discharge end of the conveyor line. The perforated frame is provided with a clearance space to avoid the swing end of the L-shaped frame. When the driver drives the L-shaped frame and the PCB board on its back from a horizontal state to a vertical state, the perforated frame can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block. The plate receiving seat can support the PCB board on the perforated frame to prevent the PCB board from falling over.

[0009] In some possible implementations, the cutout frame is provided with an inclined raised part at one end near the material outlet of the conveyor line. The slope of the inclined raised part is inclined towards the receiving plate seat. When the L-shaped frame changes from a horizontal state to a vertical state, the inclined raised part can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block.

[0010] In some possible implementations, the inclined section includes a gentle slope and a steep slope, the gentle slope being near one end of the conveyor line discharge end, the sliding platform being able to slide to the bottom of the steep slope, and the rotational lever arm between the limiting hook block and the rotation center of the L-shaped frame not exceeding the length of the gentle slope between the rotation center of the L-shaped frame and the top of the steep slope.

[0011] In some possible implementations, the frame is provided with a pushing mechanism, which includes a pushing cylinder and a pushing seat mounted on the telescopic end of the pushing cylinder. The pushing cylinder is mounted on the frame in the corresponding area at the discharge end of the conveyor line. Two guide posts are movably inserted on the outward side of the pushing seat. A pushing block is connected to the outward end of the two guide posts. A shock-absorbing spring is movably fitted on the area between the two guide posts and the pushing seat and the pushing block. The two ends of the shock-absorbing spring are respectively connected to the pushing seat and the pushing block. The pushing cylinder can drive the pushing block to press and stack the PCB board of the L-shaped frame placed on the support plate mechanism.

[0012] In some possible implementations, the L-shaped frame includes a rotating shaft, two rotating arms, and support arms disposed at one end of the two rotating arms. The two ends of the rotating shaft are rotatably mounted on the frame below and in front of the discharge end of the conveyor line. One end of the rotating shaft is connected to the rotating end of the driver. The other end of each rotating arm is adjustablely mounted on the outer wall of the rotating shaft. The two rotating arms and their corresponding support arms are vertically connected and form an L-shape. One movable end of each support arm can rest on the discharge end of the conveyor line, and the two support arms are connected by a connecting rod. The back surfaces of the two support arms together form a support plane. A limiting hook is mounted on the back surface of the support arm near the rotating arm. The limiting hook has a notch at the end facing the movable end of the support arm, which, in conjunction with the back surface of the support arm, forms a slot for securing a PCB board. A guide wheel is rotatably mounted on the end of the limiting hook located at the notch, and the outer circumference of the guide wheel extends into the slot.

[0013] In some possible implementations, a sloping protrusion is provided on the area of ​​both support arms at the slot inlet.

[0014] In some possible implementations, the dust removal device includes a support, a feeding roller, and a take-up roller. The feeding roller and the take-up roller are rotatably mounted on the support at both ends. The support is mounted on a frame and has a take-up motor for driving the take-up roller. Two parallel adhesive rollers are rotatably mounted on the support. A winding roller is rotatably mounted on the side of the support near the feeding roller. A support conveyor structure is located directly below the support. The inlet and outlet ends of the support conveyor structure are connected to the conveyor line. The two adhesive rollers cooperate with the support conveyor structure to clamp and convey a PCB board. The adhesive film released by the feeding roller bypasses the winding roller and abuts against both adhesive rollers. The take-up roller can take up the adhesive film that bypasses the winding roller. When the take-up roller takes up the adhesive film, it drives the two adhesive rollers to rotate.

[0015] In some possible implementations, slide rails are provided on both sides of the bracket, and a sliding seat is slidably mounted on each slide rail. The two ends of the winding roller are rotatably mounted on the sliding seats, and a guide rod is movably inserted into each sliding seat. A limit ring is provided on the two guide rods, and a compression spring is movably fitted on the guide rod in the area between the limit ring and the sliding seat. The other ends of the two guide rods are connected to the telescopic end of the clamping cylinder on the bracket through a connecting plate.

[0016] In some possible implementations, the feeding device includes an automatic stacking mechanism, a drive shaft, a tilting arm mounted on the drive shaft, and a tilting motor mounted on a frame. Several suction cups are provided on one side of the tilting arm. The drive shaft is rotatably mounted on the frame in the corresponding area at the feed end of the conveyor line. The feed end of the conveyor line and the automatic stacking mechanism are respectively located on both sides of the tilting arm. A clearance area is provided on the feed end of the conveyor line to avoid the tilting arm. Guide plates are provided on both sides of the frame at the feed end of the conveyor line. The tilting motor can drive the tilting arm to move between the feed end of the conveyor line and the automatic stacking mechanism to transfer the PCB boards stacked on the automatic stacking mechanism and place them flat on the feed end of the conveyor line.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention's automated dry film laminating line for PCB boards achieves fully automated integration of the entire process, including feeding, dust removal, laminating, cooling and flipping, and unloading. It eliminates the need for manual assistance, significantly improving production efficiency and reducing secondary contamination of PCB boards caused by human contact. The unloading device utilizes an L-shaped frame for horizontal receiving and vertical swing, combined with a support plate mechanism for ejection, to achieve vertical unloading and stacking of PCB boards. This avoids the adhesion and scratching problems that occur when horizontally stacking the dry film before it has set, ensuring laminating quality. The cooperation between the limiting hook and the guide wheel not only limits the horizontal receiving of the PCB boards but also reduces frictional resistance during ejection, ensuring smooth transfer. The dust removal device uses a combination of adhesive film and adhesive rollers to adhere and remove dust from the PCB board surface. Compared to traditional blowing and electrostatic dust removal, this method is more effective at cleaning fine dust and adhesive impurities. Furthermore, the adhesive film can be automatically replaced with the take-up roller, ensuring continuous and stable dust removal. The feeding device automatically feeds PCB boards using suction cups and a flipping arm. The guide plate ensures the positional accuracy of the PCB boards as they are fed onto the conveyor line, laying the foundation for the smooth operation of subsequent processes.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the feeding device in an embodiment of the present invention;

[0022] Figure 3 This is a partial structural schematic diagram of the feeding device in an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the dust removal device in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the feeding device and the bearing plate mechanism in an embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional schematic diagram of the cooperation between the feeding device and the bearing plate mechanism in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the feeding device in an embodiment of the present invention;

[0027] Figure 8 This is a cross-sectional schematic diagram of the cooperation between the feeding device and the bearing plate mechanism in another embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] Frame 100, supporting conveyor structure 110, guide plate 120;

[0030] Conveyor line 200, clearance area 210;

[0031] Feeding device 300, automatic stacking mechanism 310, drive shaft 320, tilting arm 330, tilting motor 340, suction cup 350;

[0032] Dust removal device 400, bracket 410, slide rail 411, feeding roller 420, winding roller 430, winding motor 440, sticking roller 450, winding roller 460, sliding seat 470, guide rod 480, limit ring 481, pressure spring 482, pressing cylinder 490;

[0033] 500-ton desiccant film drying device;

[0034] Cooling and turning device 600;

[0035] The components include: feeding device 700, driver 710, L-shaped frame 720, rotating shaft 721, rotating arm 722, support arm 723, connecting rod 724, slope protrusion 725, limiting hook block 730, notch 731, and guide wheel 732.

[0036] 800 bearing plate mechanism, 810 hollow frame, 811 inclined raised part, 812 gentle slope section, 813 steep slope section, 820 sliding platform, 830 connecting plate seat, 840 clearance space;

[0037] Pushing mechanism 900, pushing cylinder 910, pushing seat 920, guide column 930, pushing block 940, shock absorber spring 950. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] Reference Figures 1 to 8 As shown, this application provides an automatic dry film laminating line for PCB boards, including a frame 100, on which a conveyor line 200 is arranged; the frame 100 is sequentially arranged with a feeding device 300, a dust removal device 400, a dry film pressing device 500, a cooling and turning device 600, and a discharging device 700 along the conveying direction of the conveyor line 200. The discharging device 700 includes a driver 710 and an L-shaped frame 720. Both sides of one end of the L-shaped frame 720 are rotatably mounted on the frame 100. The driver 710 is mounted on the frame 100 and is connected to the rotation center of the L-shaped frame 720. The driver 710 can drive one swinging end of the L-shaped frame 720 to swing horizontally and place it on the discharge end of the conveyor line 200. In its flat state, the back of the L-shaped frame 720 can support a PCB board. A limiting hook block 730 is provided on the back of the L-shaped frame 720 away from the discharge end of the conveyor line 200. The limiting hook block 730 can accommodate and restrict the corresponding side of the PCB board. A support plate mechanism 800 is slidably provided in front of the discharge end of the conveyor line 200. The support plate mechanism 800 can be close to or away from the discharge end of the conveyor line 200. When the driver 710 drives the L-shaped frame 720 and the PCB board on its back to change from a horizontal state to a vertical state, the receiving end of the support plate mechanism 800 can cooperate with the swinging action of the L-shaped frame 720 to push the PCB board on the back of the L-shaped frame 720 out from the limiting hook block 730 and support the PCB board.

[0040] Specifically, the conveyor line 200 adopts a belt conveyor or a roller conveyor, and its conveying speed can be adjusted according to the processing rhythm of each process to achieve precise connection between each process. In this application, the conveyor line 200 adopts a multi-segment structure design, which is adapted to the actions of the feeding device 300, dust removal device 400, film drying device 500, cooling and turning device 600, and unloading device 700, etc. Therefore, it can be selected as a belt conveyor or a roller conveyor according to the requirements. In some embodiments, the belt conveyor can even be selected as a single conveyor or multiple conveyor belts according to the requirements. The driver 710 adopts a servo motor, which can precisely control the swing angle and speed of the L-shaped frame 720 to ensure the stability of PCB board receiving and transfer. This lamination line integrates all devices into one unit via the frame 100. After the feeding device 300 automatically feeds the PCB board, the conveyor line 200 sequentially conveys the PCB board to the dust removal device 400, the dry film pressing device 500, and the cooling and turning device 600, which respectively complete the dust removal, lamination, and turning and cooling processes. Finally, the unloading device 700, in conjunction with the board support mechanism 800, completes the vertical unloading. The entire process requires no manual intervention, effectively improving production efficiency and avoiding PCB board surface contamination caused by human contact.

[0041] Furthermore, in the actual production process, since uncoated PCBs are generally fed flat, the feeding device 300 can be a conventional multi-axis robot. The dust removal device 400 can use electrostatic dust removal or adhesive dust removal, for example, patent CN202210994694.X - Circuit Board Inspection Equipment and Dust Removal Method with Dust Removal Robot or CN202211422205.X - Circuit Board Inspection Equipment with Automatic Dust Removal Structure; the dry film pressing device 500 has a conventional structure, and can refer to the technical solutions in patent CN206212439U - An Automatic Wetting and Dry Film Applying Device for Flexible Circuit Boards or CN117858368A - A Cover Film Pressing Equipment for Flexible Circuit Boards, which will not be described in detail here. The purpose of the cooling and flipping device 600 is to cool and flip the PCB board after pressing the dry film, so that the subsequent unloading device 700 can unload the material. For this purpose, it can adopt the technical solution in the circuit board flipping structure of patent 202220690592.4. The above structural design is all prior art, and will not be described in detail in this application.

[0042] The unloading device 700 of this lamination line uses an L-shaped frame 720 to horizontally support the PCB board, and then drives it to swing to a vertical position via a servo motor. In conjunction with the support plate mechanism 800, the PCB board is pushed out and vertically supported and stacked. Compared with the traditional horizontal unloading method, this avoids the sticking and scratching problems that occur when the PCB board is just finished lamination due to the dry film not being set, effectively ensuring the quality of dry film lamination. The setting of the limiting hook block 730 can limit the PCB board during the horizontal support and swinging process of the L-shaped frame 720, preventing the PCB board from slipping or shifting, and ensuring the stability of the transfer process.

[0043] See Figure 2 and Figure 3 To facilitate PCB board loading, in one embodiment of this application, the loading device 300 includes an automatic stacking mechanism 310, a drive shaft 320, a flipping arm 330 mounted on the drive shaft 320, and a flipping motor 340 mounted on the frame 100. A plurality of suction cups 350 are provided on one side of the flipping arm 330. The drive shaft 320 is rotatably mounted on the frame 100 in the corresponding area at the feed end of the conveyor line 200. The feed end of the conveyor line 200 and the automatic stacking mechanism 310... The 0 are respectively set on both sides of the flipping arm 330. The feed end of the conveyor line 200 is provided with a clearance area 210 to avoid the flipping arm 330. The frame 100 is provided with guide plates 120 on both sides of the feed end of the conveyor line 200. The flipping motor 340 can drive the flipping arm 330 to move between the feed end of the conveyor line 200 and the automatic stacking mechanism 310, so as to transfer the PCB boards stacked on the automatic stacking mechanism 310 and place them flat on the feed end of the conveyor line 200.

[0044] Specifically, the automatic stacking mechanism 310 uses a screw lifting platform in conjunction with a material support plate, which can automatically lift the stacked PCB boards according to the feeding rhythm, so that the topmost PCB board is always in the suction position of the suction cup 350. The suction cup 350 is a vacuum suction cup, which provides negative pressure through a vacuum generator, which can stably adsorb the PCB board and avoid damage to the PCB board during the adsorption process. The automatic stacking mechanism 310 is actually a conventional technical solution, which will not be described in detail in this application. For details, please refer to the technical solutions in patent CN202121556888.9-Automatic loading and unloading equipment and automatic loading system for tray chip materials or CN202321951987.6-A material box lifting and loading machine.

[0045] In the above embodiments, the flipping motor 340 is a stepper motor, which can precisely control the flipping angle of the flipping arm 330, ensuring that the PCB board is smoothly flipped from a vertical adsorption state to a horizontal placement state. During loading, the flipping arm 330 rotates to one side of the automatic stacking mechanism 310, and the suction cup 350 adsorbs the topmost PCB board. Then, the flipping motor 340 drives the drive shaft 320 to rotate, causing the flipping arm 330 to flip to the feeding end of the conveyor line 200. Preferably, it flips 180° in this application. Then, the suction cup 350 releases the PCB board, which falls onto the conveyor line 200. The guide plate 120 limits and guides the PCB board, ensuring it is accurately positioned on the conveying path of the conveyor line 200. The avoidance zone 210 prevents interference between the flipping arm 330 and the conveyor line 200. This loading device achieves automatic adsorption, flipping, and loading of PCB boards with high positioning accuracy and fast loading efficiency, laying the foundation for the smooth progress of subsequent processes.

[0046] It should be noted that in the above embodiments, the conveyor line 200 adapted to the feeding device 300 is actually a roller conveyor mechanism. In order to avoid the tilting arm 330, the roller on it is provided with a relief ring groove structure, or the movable space on the tilting arm 330 avoids the roller mentioned above. As long as the feeding of the tilting arm 330 and the normal conveying of the conveyor line 200 can be achieved, it is acceptable.

[0047] See Figure 1 and Figure 4 To improve dust removal efficiency, in one embodiment of this application, the dust removal device 400 includes a support 410, a feeding roller 420, and a winding roller 430. The two ends of the feeding roller 420 and the winding roller 430 are rotatably mounted on the support 410. The support 410 is mounted on the frame 100. A winding motor 440 for driving the winding roller 430 to rotate is provided on the support 410. Two parallel sticking rollers 450 are rotatably mounted on the support 410, with the support 410 located on the side of the two sticking rollers 450 closest to the feeding roller 420. A winding roller 460 is rotatably mounted on the frame 100. A support conveyor structure 110 is located directly below the support 410. The inlet and outlet ends of the support conveyor structure 110 are connected to the conveyor line 200. Two adhesive rollers 450 can cooperate with the support conveyor structure 110 to clamp and deliver the PCB board. The adhesive film released by the unloading roller 420 bypasses the winding roller 460 and abuts against both adhesive rollers 450. The take-up roller 430 can take up the adhesive film that bypasses the winding roller 460. When the take-up roller 430 takes up the adhesive film, it can drive the two adhesive rollers 450 to rotate.

[0048] Specifically, the adhesive roller 450 is made of silicone with an adhesive layer on its surface, possessing both elasticity and stickiness, allowing it to make close contact with the PCB board surface. The supporting conveyor structure 110 employs air cushion conveying, steel belt conveying, or roller conveying to avoid scratching the PCB board surface, while simultaneously working with the adhesive roller 450 to achieve stable clamping and feeding of the PCB board. A dust-removing adhesive film is wound on the unloading roller 420. After passing over the winding roller 460, the film tightly abuts against the outer walls of the two adhesive rollers 450. The take-up motor 440 drives the take-up roller 430 to rotate, achieving automatic unwinding and take-up of the adhesive film. The adhesive rollers 450 rotate synchronously under the influence of the adhesive film. When the PCB board is conveyed by the support conveyor structure 110 and passes between the two adhesive rollers 450, the adhesive film on the adhesive rollers 450 makes close contact with the upper and lower surfaces of the PCB board, adhering and removing fine dust and impurities from the surface. Compared with traditional air blowing and electrostatic dust removal, the dust removal effect is better, and it can effectively clean sticky impurities, avoiding problems such as poor dry film adhesion, air bubbles, and edge curling caused by impurity residue. The take-up roller 430 can promptly take back the adhesive film with impurities, ensuring that the adhesive rollers 450 are always in contact with clean adhesive film, thus guaranteeing the continuity and stability of the dust removal effect.

[0049] In the above embodiment, for ease of adjustment, slide rails 411 are provided on both sides of the bracket 410, and a sliding seat 470 is slidably mounted on each slide rail 411. The two ends of the winding roller 460 are rotatably mounted on the sliding seat 470, and a guide rod 480 is movably inserted into each sliding seat 470. A limit ring 481 is provided on the two guide rods 480. A compression spring 482 is movably fitted on the guide rod 480 in the area between the limit ring 481 and the sliding seat 470. The other ends of the two guide rods 480 are connected to the telescopic end of the clamping cylinder 490 on the bracket 410 through a connecting plate.

[0050] Specifically, the clamping cylinder 490 drives the winding roller 460 to slide along the slide rail 411 via the guide rod 480 and the sliding seat 470, which can adjust the distance between the winding roller 460 and the adhesive roller 450, thereby adjusting the pressure between the adhesive film and the adhesive roller 450. The pressure spring 482 provides elastic pressure, ensuring that the adhesive film is always in close contact with the adhesive roller 450, preventing slippage between the adhesive roller 450 and the adhesive film when it rotates, and accommodating rotational deviations of the adhesive roller 450 and the winding roller 460, thus preventing the adhesive film from breaking due to excessive tension. This structure ensures a tight fit between the adhesive film and the adhesive roller 450, thereby ensuring close contact between the adhesive roller 450 and the PCB board surface, improving the dust removal effect.

[0051] See Figure 1 , Figures 5 to 7To better receive and unload PCB boards, in one embodiment of this application, the L-shaped frame 720 includes a rotating shaft 721, two rotating arms 722, and support arms 723 disposed at one end of the two rotating arms 722. The two ends of the rotating shaft 721 are rotatably mounted on the frame 100 located in front of and below the discharge end of the conveyor line 200. One end of the rotating shaft 721 is connected to the rotating end of the driver 710. The other end of each rotating arm 722 is adjustablely mounted on the outer wall of the rotating shaft 721. The two rotating arms 722 and the corresponding support arms 723 are vertically connected and form an L-shape. One end of each support arm 723 is movable. The end can be placed on the discharge end of the conveyor line 200, and the two support arms 723 are connected by a connecting rod 724; the back sides of the two support arms 723 together form a support plane; the limiting hook block 730 is installed on the back side of the support arm 723 near the rotating arm 722, and the limiting hook block 730 has a notch 731 on the end facing the movable end of the support arm 723. The notch 731 cooperates with the back side of the support arm 723 to form a slot for holding the PCB board. The limiting hook block 730 is rotatably provided with a guide wheel 732 on the end of the notch 731, and the outer periphery of the guide wheel 732 extends into the slot.

[0052] Specifically, the rotating shaft 721 is mounted on the frame 100 via a bearing seat to ensure smooth rotation. An opening is provided at one end of the rotating arm 722, which is fitted onto the outer wall of the rotating shaft 721. The rotating arm 722 is positioned between the openings and secured with a locking nut. This design allows adjustment of the mounting position of the rotating arm 722 on the rotating shaft 721 according to the length of the PCB board, thereby adjusting the support length of the support arm 723 to accommodate different PCB board specifications and improve the device's versatility. The connecting rod 724 enhances the connection strength between the two support arms 723, ensuring the flatness of the support surface. The notch 731 of the limiting hook block 730 and the slot formed by the support arm 723 can accurately lock the side of the PCB board. The guide wheel 732 is made of polyurethane and its outer periphery extends into the slot. When the PCB board is locked in or pushed out, it rolls into contact with the guide wheel 732, changing sliding friction into rolling friction, greatly reducing frictional resistance, avoiding scratch damage to the side of the PCB board, and ensuring the smoothness of the ejection process.

[0053] See Figure 7Furthermore, each of the two support arms 723 is provided with a sloping protrusion 725 at the entrance end of the slot. The slope of the sloping protrusion 725 faces the discharge end of the conveyor line 200, which can guide the PCB board conveyed by the conveyor line 200, allowing the side of the PCB board to slide smoothly into the slot, avoiding the PCB board getting stuck at the entrance end of the slot, and ensuring smooth PCB board reception. At the same time, the structure of the sloping protrusion 725 allows the L-shaped frame 720 to be flipped to a vertical state, causing the PCB board in the slot to tilt towards the support mechanism 800, which facilitates the support mechanism 800 to receive it, and also facilitates the subsequent tilted vertical stacking of the PCB board on the support mechanism 800, preventing the stacked PCB board from falling over.

[0054] See Figure 5 and Figure 6 In one embodiment of this application, the plate support mechanism 800 includes a cutout frame 810 disposed on the frame 100, a sliding platform 820 slidably disposed on the cutout frame 810, and a receiving plate seat 830 disposed on the sliding platform 820. The sliding platform 820 can be close to or away from the discharge end of the conveyor line 200. The cutout frame 810 is provided with a clearance space 840 for avoiding the swing end of the L-shaped frame 720. When the driver 710 drives the L-shaped frame 720 and the PCB board on its back to change from a horizontal state to a vertical state, the cutout frame 810 can cooperate with the swinging action of the L-shaped frame 720 to push the PCB board on the back of the L-shaped frame 720 out of the limiting hook block 730. The receiving plate seat 830 can support the PCB board on the cutout frame 810 to prevent the PCB board from falling over.

[0055] Specifically, the cutout frame 810 is constructed from aluminum alloy profiles, making it lightweight and structurally strong. The sliding platform 820 is slidably connected to the cutout frame 810 via a linear guide rail and is driven by a cylinder or lead screw module. This allows for adjustment of the position of the receiving seat 830 according to the specifications and stacking quantity of the PCB boards, ensuring the neatness of the PCB board stacking. The clearance space 840 prevents motion interference between the L-shaped frame 720 and the cutout frame 810 during the swinging process, ensuring smooth swinging and ejection actions. When the L-shaped frame 720 changes from a horizontal to a vertical position, the side of the PCB board contacts the end of the cutout frame 810. As the L-shaped frame 720 continues to swing, the cutout frame 810 gradually ejects the PCB board from the slot of the limiting hook block 730. The ejected PCB board finally lands on the receiving seat 830 for vertical or inclined vertical support. The entire ejection and support process is smooth, without any jamming, friction, or scratching issues. In the above embodiment, the design of the sloping protrusion 725 causes the PCB board, after being pushed out, to naturally fall towards the receiving plate seat 830 due to its own weight. Its slightly inclined design facilitates the stability of PCB board stacking.

[0056] In the improved embodiment described above, to prevent the stacked PCB boards from collapsing, the cutout frame 810 is provided with an inclined tilting part 811 at the end near the discharge end of the conveyor line 200. The slope of the inclined tilting part 811 faces the receiving seat 830. When the L-shaped frame 720 changes from a horizontal to a vertical state, the inclined tilting part 811 can cooperate with the swinging motion of the L-shaped frame 720 to push the PCB board on the back of the L-shaped frame 720 out of the limiting hook block 730. The design of the inclined tilting part 811 can effectively prevent the bottom of the PCB board from sliding towards the discharge end of the conveyor line 200 after it is pushed out of the limiting hook block 730, ensuring that the PCB board is stably stacked on the cutout frame 810. At the same time, the design of the inclined tilting part 811 ensures that all PCB boards stacked on the cutout frame 810 tilt towards the receiving seat 830.

[0057] See Figure 6 In the above-mentioned improved scheme, the inclined lifting part 811 includes a gentle slope section 812 and a steep slope section 813. The gentle slope section 812 is located near the discharge end of the conveyor line 200. The sliding platform 820 can slide to the bottom of the steep slope section 813. The rotational lever arm 722 between the limiting hook block 730 and the rotation center of the L-shaped frame 720 does not exceed the length of the gentle slope section 812 between the rotation center of the L-shaped frame 720 and the top of the steep slope section 813. The design of the gentle slope section 812 is mainly to cooperate with the L-shaped frame 720 to push out the PCB board, while the design of the steep slope section 813 is mainly to facilitate the natural stacking of the PCB board in the later stage, and to avoid the PCB board from sliding due to the gentle slope section 812 automatically, thereby causing the stack to collapse. In addition, the setting of the gentle slope section 812 realizes the initial ejection and sliding guidance of the PCB board. As the L-shaped frame 720 continues to swing, the support arm 723 on it will push the PCB board that has fallen on the gentle slope section 812 to slide to the side of the steep slope section 813 until the L-shaped frame 720 stops rotating. At this time, the bottom surface of the PCB board is on the steep slope section 813.

[0058] It should be noted that the board receiving seat 830 mainly supports the PCB boards stacked in an inclined state. It can automatically move away from the discharge end of the conveyor line 200 according to the number of PCB boards stacked, and adapt to the number of PCB boards stacked.

[0059] See Figure 8To ensure that the PCB boards on the steep slope section 813 can be received by the receiving plate holder 830 and that the PCB boards on the receiving plate holder 830 are more tightly stacked, in an improved embodiment of this application, a pushing mechanism 900 is provided on the frame 100. The pushing mechanism 900 includes a pushing cylinder 910 and a pushing seat 920 installed on the telescopic end of the pushing cylinder 910. The pushing cylinder 910 is installed on the frame 100 in the corresponding area at the discharge end of the conveyor line 200, and the pushing seat 920 extends outward. Two guide posts 930 are movably inserted on one side. A push block 940 is connected to the outward end of the two guide posts 930. A shock-absorbing spring 950 is movably fitted on the area between the push seat 920 and the push block 940 of the two guide posts 930. The two ends of the shock-absorbing spring 950 are connected to the push seat 920 and the push block 940 respectively. The push cylinder 910 can drive the push block 940 to press and stack the PCB board of the L-shaped frame 720 on the support plate mechanism 800.

[0060] Specifically, the end face of the push block 940 is equipped with a rubber buffer pad to prevent hard contact damage to the PCB board during the push process. Simultaneously, its end face is an inclined plane, with the inclination angle matching the inclination angle of the PCB boards stacked on the receiving plate base 830. The shock-absorbing spring 950 buffers the pushing force of the push cylinder 910, preventing excessive force from damaging the PCB board or dry film. After the receiving plate base 830 on the bearing mechanism 800 receives several PCB boards, the push cylinder 910 drives the push block 940 to move towards the PCB board, simultaneously allowing the PCB boards on the steep slope section 813 to finally slide stably onto the receiving plate base 830 or onto the already stacked PCB boards on the receiving plate base 830. This design presses and tightens the stacked PCB boards, ensuring the neatness of the vertically stacked PCB boards, preventing displacement and scattering during subsequent transportation, and reducing the gap between PCB boards, thus improving space utilization.

[0061] It should be further explained that, in this embodiment, when the receiving plate holder 830 needs to support the PCB board, that is, when the L-shaped frame 720 rotates to the vertical position, the sliding platform 820 will drive the receiving plate holder 830 to approach the L-shaped frame 720, and the receiving plate holder 830 will be inserted into the bottom surface of the PCB board. At this time, because the PCB board is supported by the inclined steep slope section 813, the receiving plate holder 830 will not contact the bottom surface of the PCB board. When the PCB board slides completely from the connection between the steep slope section 813 and the gentle slope section 812 to the steep slope section 813 due to its own weight or the pushing action of the L-shaped frame 720, the bottom surface of the PCB board will be pushed by the pushing cylinder 910 through the pushing block 940 and slide to the bottom of the steep slope section 813. At this time, the receiving plate holder 830 will support and lift the PCB board sliding on the steep slope section 813. After receiving the PCB board, due to the inclined design of the steep slope section 813, the PCB board on the steep slope section 813 will eventually fall onto the receiving seat 830, and will not fall towards the discharge end of the conveyor line 200. After receiving one PCB board, the push cylinder 910, together with the push block 940 and the receiving seat 830, clamps the PCB board stack and then moves a certain distance away from the discharge end of the conveyor line 200. At this time, the L-shaped frame 720 has room to move again, and can then reverse and reset to wait for the arrival of the next PCB board.

[0062] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automatic dry film lamination line for PCB boards, characterized in that, The system includes a frame on which a conveyor line is mounted. Along the conveying direction of the conveyor line, the frame is sequentially equipped with a feeding device, a dust removal device, a film drying device, a cooling and turning device, and a discharging device. The discharging device includes a driver and an L-shaped frame. Both sides of one end of the L-shaped frame are rotatably mounted on the frame. The driver is mounted on the frame and is connected to the rotation center of the L-shaped frame. The driver can drive one swinging end of the L-shaped frame to a horizontal position and place it on the discharge end of the conveyor line. In the horizontal state, the back of the L-shaped frame can support the PC (polycarbonate). Board B, the L-shaped frame has a limiting hook block on the back end away from the discharge end of the conveyor line. The limiting hook block can accommodate and restrict the corresponding side of the PCB board. The frame is slidably provided with a support plate mechanism in front of the discharge end of the conveyor line. The support plate mechanism can approach or move away from the discharge end of the conveyor line. When the driver drives the L-shaped frame and the PCB board on its back from a horizontal state to a vertical state, the receiving end of the support plate mechanism can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block and receive the PCB board.

2. The automatic dry film lamination line for PCB boards according to claim 1, characterized in that: The plate support mechanism includes a perforated frame mounted on the machine frame, a sliding platform slidably mounted on the perforated frame, and a plate receiving seat mounted on the sliding platform. The sliding platform can be close to or away from the discharge end of the conveyor line. The perforated frame is provided with a clearance space to avoid the swing end of the L-shaped frame. When the driver drives the L-shaped frame and the PCB board on its back to change from a horizontal state to a vertical state, the perforated frame can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block. The plate receiving seat can support the PCB board on the perforated frame to prevent the PCB board from falling over.

3. The automatic dry film lamination line for PCB boards according to claim 2, characterized in that: The hollow frame is provided with an inclined raised part at one end near the material outlet of the conveyor line. The slope of the inclined raised part is inclined towards the receiving plate seat. When the L-shaped frame changes from a horizontal state to a vertical state, the inclined raised part can cooperate with the swinging action of the L-shaped frame to push the PCB board on the back of the L-shaped frame out from the limiting hook block.

4. The automatic dry film lamination line for PCB boards according to claim 3, characterized in that: The inclined section includes a gentle slope and a steep slope. The gentle slope is located near the discharge end of the conveyor line. The sliding platform can slide to the bottom of the steep slope. The rotational arm between the limiting hook block and the rotation center of the L-shaped frame does not exceed the length of the gentle slope between the rotation center of the L-shaped frame and the top of the steep slope.

5. The automatic dry film lamination line for PCB boards according to claim 1, characterized in that: The frame is equipped with a pushing mechanism, which includes a pushing cylinder and a pushing seat mounted on the telescopic end of the pushing cylinder. The pushing cylinder is mounted on the frame in the corresponding area at the discharge end of the conveyor line. Two guide pillars are movably inserted on the outward side of the pushing seat. A pushing block is connected to the outward end of the two guide pillars. A shock-absorbing spring is movably fitted on the area between the two guide pillars and the pushing seat. The two ends of the shock-absorbing spring are respectively connected to the pushing seat and the pushing block. The pushing cylinder can drive the pushing block to press and stack the PCB board of the L-shaped frame on the support plate mechanism.

6. The automatic dry film lamination line for PCB boards according to claim 1, characterized in that: The L-shaped frame includes a rotating shaft, two rotating arms, and support arms mounted on one end of the two rotating arms. The two ends of the rotating shaft are rotatably mounted on the frame below and in front of the material outlet of the conveyor line. One end of the rotating shaft is connected to the rotating end of the driver. The other end of each rotating arm is adjustablely mounted on the outer wall of the rotating shaft. The two rotating arms and their corresponding support arms are vertically connected and form an L-shape. One movable end of each support arm can rest on the material outlet of the conveyor line, and the two support arms are connected by a connecting rod. The back surfaces of the two support arms together form a support plane. A limiting hook is mounted on the back surface of the support arm near the rotating arm. The limiting hook has a notch at the end facing the movable end of the support arm, which, in conjunction with the back surface of the support arm, forms a slot for securing a PCB board. A guide wheel is rotatably mounted on the end of the limiting hook located at the notch, and the outer circumference of the guide wheel extends into the slot.

7. The automatic dry film lamination line for PCB boards according to claim 6, characterized in that: Both of the support arms are provided with a sloping protrusion in the area at the entrance end of the slot.

8. An automatic dry film lamination line for PCB boards according to any one of claims 1-6, characterized in that: The dust removal device includes a support frame, a feeding roller, and a winding roller. The two ends of the feeding roller and the winding roller are rotatably mounted on the support frame, which is mounted on the machine frame. A winding motor for driving the winding roller to rotate is installed on the support frame. Two parallel adhesive rollers are rotatably mounted on the support frame. A winding roller is rotatably mounted on the side of the two adhesive rollers near the feeding roller. A support conveyor structure is installed directly below the support frame. The inlet and outlet ends of the support conveyor structure are connected to the conveyor line. The two adhesive rollers can cooperate with the support conveyor structure to clamp and convey PCB boards. The adhesive film released by the feeding roller bypasses the winding roller and abuts against both adhesive rollers. The winding roller can wind up the adhesive film that bypasses the winding roller. When the winding roller winds up the adhesive film, it can drive the two adhesive rollers to rotate.

9. The automatic dry film lamination line for PCB boards according to claim 8, characterized in that: The bracket has slide rails on both sides, and a sliding seat is slidably mounted on each slide rail. The two ends of the roller are rotatably mounted on the sliding seats. A guide rod is movably inserted into each sliding seat. A limit ring is provided on the two guide rods. A compression spring is movably fitted on the guide rod in the area between the limit ring and the sliding seat. The other ends of the two guide rods are connected to the telescopic end of the clamping cylinder on the bracket through a connecting plate.

10. The automatic dry film lamination line for PCB boards according to claim 1, characterized in that: The feeding device includes an automatic stacking mechanism, a drive shaft, a tilting arm mounted on the drive shaft, and a tilting motor mounted on a frame. Several suction cups are provided on one side of the tilting arm. The drive shaft is rotatably mounted on the frame in the corresponding area at the feed end of the conveyor line. The feed end of the conveyor line and the automatic stacking mechanism are respectively located on both sides of the tilting arm. A clearance area is provided on the feed end of the conveyor line to avoid the tilting arm. Guide plates are provided on both sides of the frame at the feed end of the conveyor line. The tilting motor can drive the tilting arm to move between the feed end of the conveyor line and the automatic stacking mechanism to transfer the PCB boards stacked on the automatic stacking mechanism and place them flat on the feed end of the conveyor line.

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