A soft board line oxidation prevention processing device

Abstract

The utility model discloses a kind of anti-oxidation treatment equipment of soft board circuit, including oven, the both ends of oven are respectively provided with feed inlet and discharge port, and feed inlet and discharge port place are commonly equipped with the installation of mesh belt conveyor, the oven is movably installed with baffle, the top of oven is fixedly installed with electric cylinder for driving baffle, the bottom of baffle is fixedly installed with multiple hot air knives, the bottom of baffle is fixedly installed with multiple pitch adjusting mechanism, two sliding blocks are installed on pitch adjusting mechanism;The utility model is equipped with mesh belt conveyor, pitch adjusting mechanism etc., can be in oven using pitch adjustable pressure wheel to press the two side edges of FPC tightly on mesh belt surface, to facilitate using mesh belt conveyor to FPC coiled tape is transported, and using hot air knife to the OSP on the surface of FPC is dried in conveying process, use effect is good, and can be adapted to different width FPC, and wide adaptability.

Description

Technical Field

[0001] This utility model relates to the technical field of flexible printed circuit board (FPC) processing equipment, specifically an anti-oxidation treatment device for FPCs, used for roll-to-roll continuous drying of OSP anti-oxidation treatment on the surface of FPCs. Background Technology

[0002] Flexible printed circuit boards (FPCs) are widely used in consumer electronics, automotive electronics, and medical devices due to their thinness, flexibility, and high integration. To prevent oxidation of the copper foil circuitry in FPCs, an organic protective film is formed on the copper surface using the OSP (Optical Separation Film) process. The drying quality after OSP coating directly determines the film adhesion, corrosion resistance, and compatibility with subsequent processing; therefore, OSP-coated FPCs require drying treatment.

[0003] A search revealed that patent CN221562569U discloses a drying device for printed circuit boards. By setting a limiting component, two clamping plates are pulled outward to place the circuit board to be dried on the top of the limiting seat. Then, the two clamping plates are released, and the slide rod is reset under the action of the spring, so that the two clamping plates clamp and limit the circuit board, ensuring that the circuit board remains stable during the drying process and preventing it from being blown off by the wind and causing damage, thus improving the stability of the drying work.

[0004] While the above-mentioned solutions can clamp the flexible circuit board to improve its stability during the drying process, they are only applicable to the processing of sheet-like flexible circuit boards and cannot be applied to roll-to-roll FPC production. Therefore, we propose a kind of anti-oxidation treatment equipment for flexible circuit boards. Utility Model Content

[0005] The purpose of this invention is to provide an anti-oxidation treatment device for flexible printed circuit boards (FPCBs) to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An anti-oxidation treatment device for flexible printed circuit boards includes an oven with an inlet and an outlet at both ends. A mesh belt conveyor is installed through both the inlet and outlet. A partition is movably installed inside the oven. An electric cylinder for driving the partition is fixedly installed on the top of the oven. Multiple hot air knives are fixedly installed on the bottom of the partition. Multiple spacing adjustment mechanisms are fixedly installed on the bottom of the partition. Each spacing adjustment mechanism has two sliders installed on it. The spacing adjustment mechanism is used to adjust the spacing between the two sliders. The bottom of each slider is connected to a wheel frame through an elastic telescopic mechanism, and a pressure roller is rotatably installed inside the wheel frame.

[0008] As a further embodiment of this utility model: the spacing adjustment mechanism includes a bidirectional screw rod rotatably mounted on the bottom of the partition plate via a bearing seat, a handwheel is mounted on one end of the bidirectional screw rod, and the slider is fitted onto the bidirectional screw rod through a threaded hole. The bottom of the partition plate is fixedly mounted with a guide rail above each bidirectional screw rod, and the slider is slidably fitted onto the corresponding guide rail through a guide groove.

[0009] As a further embodiment of this utility model: the elastic telescopic mechanism includes a sleeve fixedly installed at the bottom of the slider. A spring and a sliding rod are arranged sequentially from top to bottom inside the sleeve. The bottom end of the sliding rod is fixedly connected to the top of the wheel frame. A guide pin is fixedly installed on the outside of the sliding rod inside the sleeve. Two opening slots are symmetrically opened on the outer wall of the sleeve, and the two ends of the guide pin are located in the corresponding opening slots.

[0010] As a further embodiment of this utility model: after the push rod end of the electric cylinder is inserted into the oven, it is fixedly connected to the partition through a force sensor. Multiple guide rods are slidably installed on the top of the oven, and the bottom end of the guide rods is fixedly connected to the top of the partition.

[0011] As a further embodiment of this utility model: air curtain machines are fixedly installed at both ends of the oven above the inlet and outlet, respectively. Air inlets and outlets are respectively opened at both ends of the oven above the two air curtain machines. An intake fan is fixedly installed on the outer wall of the oven at the corresponding position of the intake port, and an exhaust fan is fixedly installed on the outer wall of the oven at the corresponding position of the outlet.

[0012] As a further improvement of this utility model: the air inlet of the air intake fan is equipped with a filter cartridge, and the air outlet of the exhaust fan is equipped with an activated carbon filter element.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention, by setting up a mesh belt conveyor and a spacing adjustment mechanism, can press the two sides of the FPC onto the mesh belt surface using adjustable pressure rollers in the drying oven. This facilitates the conveying of the FPC roll using the mesh belt conveyor, and the OSP on the FPC surface is dried using hot air knives during the conveying process. It has good performance and can be adapted to FPCs of different widths, making it widely adaptable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an anti-oxidation treatment device for flexible printed circuit boards.

[0016] Figure 2 for Figure 1 A sectional view.

[0017] Figure 3This is a schematic diagram of the spacing adjustment mechanism in an anti-oxidation treatment device for flexible printed circuit boards.

[0018] Among them, the oven 1, mesh belt conveyor 2, mesh belt 3, partition 4, electric cylinder 5, force sensor 6, guide rod 7, hot air knife 8, guide rail 9, slider 10, bidirectional screw 11, sleeve 12, spring 13, slide rod 14, pressure roller 15, opening groove 16, guide pin 17, handwheel 18, inspection door 19, air curtain machine 20, air intake fan 21, filter cartridge 22, exhaust fan 23, activated carbon filter element 24. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation in the specification, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] Please see Figures 1-3In this embodiment of the present invention, an anti-oxidation treatment device for flexible printed circuit boards (FPCs) includes an oven 1, which is designed to be 3m long × 1m wide × 0.8m high. The oven 1 has an inlet and an outlet at both ends, and a mesh belt conveyor 2 is installed at both the inlet and outlet. The mesh belt 3 of the mesh belt conveyor 2 is 600mm wide and has a conveying speed of 0.5-3m / min. The mesh belt 3 is made of stainless steel wire mesh or polytetrafluoroethylene (PTFE) with a surface roughness Ra≤0.8μm to avoid scratching the FPC. A partition 4 is movably installed inside the oven 1, and an electric cylinder 5 for driving the partition 4 is fixedly installed on the top of the oven 1. Multiple hot air blades 8 are fixedly installed at the bottom of the partition 4. The power of the hot air blades 8 is 2kW, the air outlet width is 0.5-1mm, the wind speed is adjustable from 15-25m / s, the temperature is controlled at 80-95℃, and the temperature control accuracy is ±2℃. Multiple spacing adjustment mechanisms are fixedly installed at the bottom of the partition 4. Each spacing adjustment mechanism is equipped with two sliders 10. The spacing adjustment mechanism is used to adjust the spacing between the two sliders 10. The bottom of each slider 10 is connected to a wheel frame through an elastic telescopic mechanism, and a pressure roller 15 is rotatably installed in the wheel frame. The pressure roller 15 is made of silicone material with a hardness of 50-70 Shore A to avoid damaging the FPC.

[0024] By adopting the above-mentioned solution, in use, the OSP-coated FPC roll is passed through the inlet and outlet of the drying oven 1. The spacing between every two corresponding pressure rollers 15 is adjusted according to the width of the roll so that the two pressure rollers 15 can press on the edges of both sides of the roll to press the roll tightly onto the surface of the mesh belt 3 and avoid contact with the OSP-coated copper foil. Then, the hot air knife 8 and the mesh belt conveyor 2 are started, so that the OSP coating can be dried by hot air during the conveying of the FPC roll. Under the action of the pressure rollers 15, the hot air can be prevented from blowing the FPC roll off the mesh belt 3 or causing the FPC roll to shake, thus ensuring the drying effect.

[0025] Specific combination Figure 2 and Figure 3 In one embodiment of this utility model, the spacing adjustment mechanism includes a bidirectional screw 11 rotatably mounted on the bottom of the partition 4 via a bearing seat. A handwheel 18 is mounted on one end of the bidirectional screw 11. The slider 10 is fitted onto the bidirectional screw 11 through a threaded hole. A guide rail 9 is fixedly mounted on the bottom of the partition 4 above each bidirectional screw 11. The slider 10 is slidably fitted onto the corresponding guide rail 9 through a guide groove.

[0026] By rotating the double-acting screw 11 through the handwheel 18, the two sliders 10 can be driven to move in opposite directions simultaneously through the engagement of the double-acting screw 11 with the threaded hole on the slider 10. This allows for the adjustment of the distance between the two pressure rollers 15, enabling the positioning of FPC tapes of different widths. Specifically, the distance between the two pressure rollers 15 can be adjusted from 50 to 500 mm to accommodate FPC tapes of different widths.

[0027] Specific combination Figure 2 and Figure 3 In one embodiment of the present invention, the elastic telescopic mechanism includes a sleeve 12 fixedly installed at the bottom of the slider 10. A spring 13 and a slide rod 14 are arranged sequentially from top to bottom inside the sleeve 12. The bottom end of the slide rod 14 is fixedly connected to the top of the wheel frame. A guide pin 17 is fixedly installed on the outside of the slide rod 14 inside the sleeve 12. Two opening slots 16 are symmetrically opened on the outer wall of the sleeve 12. The two ends of the guide pin 17 are located in the corresponding opening slots 16.

[0028] With the spring 13 in place, when the slider 10 moves downward, the pressure roller 15 presses against the edge of the FPC, and the slide rod 14 compresses the spring 13. Thus, the spring force of the spring 13 makes the pressure roller 15 press the FPC tightly onto the surface of the mesh belt 3. The spring force of the spring 13 is adjustable from 5 to 15 N, and can automatically compensate for the pressure according to the thickness of the FPC, avoiding damage to the FPC due to excessive pressing force. With the cooperation of the guide pin 17 and the opening groove 16, the slide rod 14 can be prevented from rotating inside the sleeve 12, and the slide rod 14 can be prevented from falling off the bottom of the sleeve 12.

[0029] Specific combination Figure 2 In one embodiment of this utility model, the push rod end of the electric cylinder 5 is inserted into the oven 1 and then fixedly connected to the partition 4 through the force sensor 6. The force sensor 6 has an accuracy of ±0.1N and monitors the pressure of the pressure roller 15 on the FPC in real time. Multiple guide rods 7 are slidably installed on the top of the oven 1. The bottom end of the guide rod 7 is fixedly connected to the top of the partition 4. The number of guide rods 7 is not less than 4, ensuring that the partition 4 rises and falls smoothly. The rising and falling stroke of the partition 4 is 0-100mm, realizing the precise adjustment of the distance between the hot air knife 8 and the FPC from 10-30mm.

[0030] Air curtain machines 20 are fixedly installed at both ends of the oven 1 above the inlet and outlet, respectively. The air pressure of the air curtain machines 20 is 0.1-0.2 MPa, forming a vertical air barrier. Air inlets and outlets are respectively opened at both ends of the oven 1 above the two air curtain machines 20. Air intake fans 21 are fixedly installed on the outer wall of the oven 1 at the corresponding positions of the air inlets. The air volume of the air intake fans 21 is 500-1000 m³ / h. 3 / h, an exhaust fan 23 is fixedly installed on the outer wall of the oven 1 at the corresponding position of the air outlet, and the air volume of the exhaust fan 23 is 600-1200m³ / h. 3 / h.

[0031] The air inlet of the air intake fan 21 is equipped with an F8 grade filter cartridge 22 with a filtration accuracy of ≥1μm to ensure the cleanliness of the incoming air; the air outlet of the exhaust fan 23 is equipped with an activated carbon filter element 24 with an adsorption efficiency of ≥90% to treat the volatile organic compounds generated during the OSP drying process.

[0032] In addition, please combine Figure 1 In one embodiment of this utility model, the oven 1 is equipped with inspection doors 19 on both the front and rear sides. The edges of the inspection doors 19 are provided with silicone sealing strips, and the air leakage rate is <5%. The inner wall of the oven 1 is covered with 50mm thick aluminum silicate insulation cotton with a thermal conductivity ≤0.03W / (m·K), so that the surface temperature of the oven 1 is ≤40℃, reducing heat loss.

[0033] Furthermore, multiple temperature and humidity sensors are installed inside the oven 1, and a PLC controller is installed outside the oven 1 to monitor the temperature and humidity inside the oven 1 in real time, and adjust the operating power of the hot air knife 8, the air intake fan 21 and the exhaust fan 23 according to the temperature and humidity data, so as to ensure the best drying effect.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-oxidation treatment device for flexible printed circuit boards, characterized in that: The oven (1) includes an oven with an inlet and an outlet at both ends, and a mesh belt conveyor (2) is installed at both the inlet and outlet. A partition (4) is movably installed inside the oven (1). An electric cylinder (5) for driving the partition (4) is fixedly installed on the top of the oven (1). Multiple hot air knives (8) are fixedly installed on the bottom of the partition (4). Multiple spacing adjustment mechanisms are fixedly installed on the bottom of the partition (4). Each spacing adjustment mechanism has two sliders (10) installed on it. The spacing adjustment mechanism is used to adjust the spacing between the two sliders (10). The bottom of each slider (10) is connected to a wheel frame through an elastic telescopic mechanism, and a pressure roller (15) is rotatably installed inside the wheel frame.

2. The anti-oxidation treatment equipment for flexible printed circuit boards according to claim 1, characterized in that: The spacing adjustment mechanism includes a bidirectional screw (11) rotatably mounted on the bottom of the partition (4) via a bearing seat. A handwheel (18) is mounted on one end of the bidirectional screw (11). The slider (10) is fitted onto the bidirectional screw (11) through a threaded hole. A guide rail (9) is fixedly mounted on the bottom of the partition (4) above each bidirectional screw (11). The slider (10) is slidably fitted onto the corresponding guide rail (9) through a guide groove.

3. The anti-oxidation treatment equipment for flexible printed circuit boards according to claim 2, characterized in that: The elastic telescopic mechanism includes a sleeve (12) fixedly installed at the bottom of the slider (10). A spring (13) and a slide rod (14) are arranged sequentially from top to bottom inside the sleeve (12). The bottom end of the slide rod (14) is fixedly connected to the top of the wheel frame. A guide pin (17) is fixedly installed on the outside of the slide rod (14) inside the sleeve (12). Two opening slots (16) are symmetrically opened on the outer wall of the sleeve (12). The two ends of the guide pin (17) are located in the corresponding opening slots (16).

4. The anti-oxidation treatment equipment for flexible printed circuit boards according to claim 1, characterized in that: After the push rod end of the electric cylinder (5) is inserted into the oven (1), it is fixedly connected to the partition (4) through the force sensor (6). Multiple guide rods (7) are slidably installed on the top of the oven (1), and the bottom end of the guide rods (7) is fixedly connected to the top of the partition (4).

5. The anti-oxidation treatment equipment for flexible printed circuit boards according to claim 1, characterized in that: Air curtain machines (20) are fixedly installed at both ends of the oven (1) above the inlet and outlet. Air inlets and outlets are respectively opened at both ends of the oven (1) above the two air curtain machines (20). An air intake fan (21) is fixedly installed on the outer wall of the oven (1) at the corresponding position of the air inlet. An exhaust fan (23) is fixedly installed on the outer wall of the oven (1) at the corresponding position of the air outlet.

6. The anti-oxidation treatment equipment for flexible printed circuit boards according to claim 5, characterized in that: The air inlet of the air intake fan (21) is equipped with a filter cartridge (22), and the air outlet of the exhaust fan (23) is equipped with an activated carbon filter element (24).

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