Novel PP glue filling device for evaluating HDI buried hole
By combining a miniature hydraulic cylinder, heating wire, and vibrator, the shortcomings of traditional glue filling devices in terms of positioning accuracy and bubble control are solved, enabling rapid and accurate positioning and uniform glue filling of HDI buried vias, thereby improving the performance and reliability of circuit boards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional glue filling devices are inadequate in terms of positioning accuracy, glue filling effect, and bubble control, making it difficult to meet the high-density interconnection requirements of HDI circuit boards. This results in glue filling position deviation, unevenness, and overflow, affecting product quality and reliability.
A miniature hydraulic cylinder controls the dispensing nozzle, combined with a heating wire to heat the adhesive and improve its fluidity. An anti-overflow component is used to prevent overflow, and a vibrator is used to reduce air bubbles, achieving fast and precise adhesive filling.
It enables rapid and accurate positioning and uniform glue filling of HDI buried vias, reduces air bubbles, improves product quality and consistency, avoids glue waste and pollution, and enhances the electrical connection stability and signal transmission quality of circuit boards.
Smart Images
Figure CN223968036U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electronic manufacturing technology, specifically relating to a novel PP filling device for evaluating HDI buried vias. Background Technology
[0002] In the field of electronics manufacturing, with the continuous development of high-density interconnect (HDI) technology, the application of HDI circuit boards is becoming increasingly widespread. The quality of the adhesive filling in HDI buried vias plays a crucial role in the performance of the circuit board, directly affecting the electrical connection stability, signal transmission quality, and overall reliability.
[0003] Traditional glue filling devices have many shortcomings in terms of positioning accuracy, glue filling effect, and air bubble control. For example, when dealing with increasingly tiny and densely packed vias, they struggle to achieve rapid and accurate positioning, leading to glue filling position deviations and affecting circuit board performance. Furthermore, glue viscosity is often affected by factors such as ambient temperature. At low temperatures or when the glue's inherent properties result in higher viscosity, uneven filling and air bubble residue are prone to occur during the filling process, thus reducing product yield and quality stability. In addition, glue overflow during the filling process not only causes waste but can also contaminate other parts of the circuit board, increasing subsequent cleaning costs and potential quality risks. Utility Model Content
[0004] The purpose of this invention is to provide a novel PP glue filling device for evaluating HDI buried holes. By activating the drive unit, the device can quickly position the buried holes on the HDI. Then, a micro hydraulic cylinder is activated to control the glue injector to inject glue into the buried holes. Next, the heating wire is activated, and the heat generated by the heating wire is transferred to the glue in the telescopic inner tube, increasing the fluidity of the glue. During glue filling, the anti-overflow component is activated, which expands to seal the gap between the glue injector and the buried hole. At the same time, the vibrator is activated to make the glue vibrate within the glue injector and the buried hole, thereby reducing air bubbles generated during glue filling and increasing product quality and consistency.
[0005] The specific technical solution adopted by this utility model is as follows:
[0006] A novel PP glue filling device for evaluating HDI buried vias includes a base plate with a fixing groove. A bracket is fixedly connected to the upper side of the base plate. The bracket consists of four vertical rods and two horizontal rods. The two horizontal rods are open on opposite sides. A transmission assembly is installed inside one of the horizontal rods, and a limit rod is fixedly connected to the other horizontal rod. A rectangular plate is driven to the outside of the transmission assembly. The end of the rectangular plate away from the transmission assembly is slidably connected to the outside of the limit rod. A miniature hydraulic cylinder is fixedly connected to the lower side of the rectangular plate. A glue transfer tank is fixedly connected to the lower side of the miniature hydraulic cylinder. A glue storage box is screwed to the upper side of the rectangular plate. A telescopic inner tube is fixedly connected to the lower side of the glue storage box. The telescopic inner tube extends into the glue storage box, passes through the rectangular plate, and extends to the lower side of the rectangular plate. One end of the telescopic inner tube is fixedly connected to one end of the glue transfer tank. A glue injector is fixedly connected to the lower side of the glue transfer tank. An anti-overflow component and a vibration component are fixedly connected to the outside of the glue injector.
[0007] Furthermore, the transmission assembly includes a servo motor, which is fixedly connected to one side of the crossbar, and the crossbar contains...
[0008] A screw is rotatably connected, with one end of the screw extending to the outside of the crossbar and fixedly connected to the output end of the servo motor.
[0009] Furthermore, the anti-overflow component includes an air pump, which is fixedly connected to the upper side of the rectangular plate. A telescopic delivery pipe is fixedly connected to the lower side of the air pump, extending into the interior of the air pump. An air bladder is fixedly connected to the end of the telescopic delivery pipe away from the air pump, and the air bladder is fixedly connected to the outside of the glue injector.
[0010] Furthermore, the vibrating element includes a vibrator, which is fixedly connected to the outside of the dispensing device.
[0011] Furthermore, a telescopic outer tube is sleeved on the outside of the telescopic inner tube, and an electric heating wire is fixedly connected inside the telescopic outer tube, with one side of the electric heating wire abutting against the outside of the telescopic outer tube.
[0012] Furthermore, the telescopic outer tube, telescopic inner tube, and telescopic conveying tube are all made of rubber.
[0013] The technical effects achieved by this utility model are as follows:
[0014] This invention discloses a novel PP glue filling device for evaluating HDI buried holes. By activating the drive unit, the device can quickly position the buried holes on the HDI. Then, a micro hydraulic cylinder is activated to control the glue injector to inject glue into the buried holes. Next, the heating wire is activated, and the heat energy generated by the heating wire is transferred to the glue in the telescopic inner tube, increasing the fluidity of the glue. During glue filling, the anti-overflow component is activated, which expands and seals the gap between the glue injector and the buried hole. At the same time, the vibrator is activated, which makes the glue vibrate within the glue injector and the buried hole, thereby reducing air bubbles generated during glue filling and increasing product quality and consistency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 3 This is a utility model Figure 2 A magnified view of a section at point A in the middle;
[0018] Figure 4 This is a cross-sectional structural diagram of the transmission assembly in the figure of this utility model;
[0019] Figure 5 This is a front view structural schematic diagram of the present invention.
[0020] The attached diagram lists the components represented by each number as follows:
[0021] 1. Base plate; 2. Bracket; 3. Servo motor; 4. Glue storage tank; 5. Air pump; 6. Telescopic outer tube; 7. Telescopic delivery tube; 8. Miniature hydraulic cylinder; 9. Fixing groove; 10. Glue transfer box; 11. Airbag; 12. Vibrator; 13. Glue dispenser;
[0022] 14. Rectangular plate; 15. Telescopic inner tube; 16. Heating wire; 17. Screw; 18. Limiting rod. Detailed Implementation
[0023] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0024] like Figures 1-5As shown, a novel PP filling device for evaluating HDI buried vias includes a base plate 1 with a fixing groove 9. A bracket 2 is fixedly connected to the upper side of the base plate 1. The bracket 2 consists of four vertical rods and two horizontal rods. The two horizontal rods are open on opposite sides. A transmission assembly is installed in one of the horizontal rods, and a limit rod 18 is fixedly connected in the other horizontal rod.
[0025] A rectangular plate 14 is connected to the outer side of the transmission assembly. The end of the rectangular plate 14 away from the transmission assembly is slidably connected to the outside of the limit rod 18. A micro hydraulic cylinder 8 is fixedly connected to the lower side of the rectangular plate 14. A glue transfer box 10 is fixedly connected to the lower side of the micro hydraulic cylinder 8. A glue storage box 4 is screwed to the upper side of the rectangular plate 14. A telescopic inner tube 15 is fixedly connected to the lower side of the glue storage box 4. The telescopic inner tube 15 extends into the glue storage box 4. The telescopic inner tube 15 passes through the rectangular plate 14 and extends to the lower side of the rectangular plate 14. One end of the telescopic inner tube 15 is fixedly connected to one end of the glue transfer box 10. A glue injector 13 is fixedly connected to the lower side of the glue transfer box 10. An anti-overflow component and a vibration component are fixedly connected to the outside of the glue injector 13.
[0026] In use, the HDI is placed inside the fixing slot 9, and then the transmission group is started. When the transmission group starts working, it can precisely control the movement of the rectangular plate 14 in the horizontal direction. One end of the rectangular plate 14 is connected to the outer side of the transmission group, and the other end is slidably connected to the outer side of the limiting rod 18. This design ensures that the rectangular plate 14 can move smoothly and accurately along the limiting rod 18 under the drive of the transmission group, thereby achieving precise adjustment of the filling position and accurately positioning it above the HDI buried hole that needs to be filled. When the rectangular plate 14 reaches the predetermined position, the micro hydraulic cylinder 8 starts to operate. The micro hydraulic cylinder 8 can push the glue transfer box 10 downward, so that the glue dispenser 13 gradually approaches the HDI buried hole for filling operation. Then the glue in the glue storage box 4 is transferred to the glue dispenser 13 through the telescopic inner tube 15 and the glue transfer box 10. Inside, the glue is then sprayed out by the glue applicator 13. During the glue filling process, when the glue in the glue applicator 13 is injected into the HDI buried via, the anti-overflow component is activated. This can effectively prevent the glue from overflowing during the injection process, avoiding glue waste and pollution or adverse effects on the surrounding environment and other components, ensuring a clean and efficient glue filling process. After the glue filling is completed, the vibration component is activated. The vibration generated by the component can make the glue fill the buried via more evenly during the injection process, reduce the generation of air bubbles inside the glue, improve the quality and reliability of the glue filling, and ensure that the glue filling effect in the buried via meets the production requirements, thereby ensuring the performance and quality of the entire HDI circuit board.
[0027] The vibrating component is model NTS54-bracket 2.
[0028] like Figure 1 , Figure 2 , Figure 4As shown, the transmission assembly includes a servo motor 3, which is fixedly connected to one side of the crossbar. A screw 17 is rotatably connected inside the crossbar. One end of the screw 17 extends to the outside of the crossbar and is fixedly connected to the output end of the servo motor 3. In use, when the servo motor 3 is started, since the screw 17 is fixedly connected to the output end of the servo motor 3, the rotational motion of the servo motor 3 is directly transmitted to the screw 17, causing the screw 17 to rotate, thereby driving the rectangular plate 14 to move.
[0029] like Figures 1-5 As shown, the anti-overflow component includes an air pump 5, which is fixedly connected to the upper side of the rectangular plate 14. A telescopic delivery pipe 7 is fixedly connected to the lower side of the air pump 5, extending into the air pump 5. An air bladder 11 is fixedly connected to the end of the telescopic delivery pipe 7 away from the air pump 5. The air bladder 11 is fixedly connected to the outside of the glue injector 13. In use, before the glue filling operation begins, the air pump 5 is started, delivering air through the telescopic delivery pipe 7 into the air bladder 11. As the air is continuously filled, the air bladder 11 gradually expands until it tightly fits against the area around the glue injector 13 where it contacts the HDI via, forming a closed protective ring. When the glue injector 13 begins to inject glue into the via, due to the sealing effect of the air bladder 11, even if the glue is filled under a certain pressure, it can effectively prevent the glue from overflowing from the gap between the glue injector 13 and the via, ensuring that the glue is accurately injected into the predetermined position, avoiding glue waste and pollution or adverse effects on the surrounding environment and other components. After the glue filling is completed, the air pump 5 stops working.
[0030] When the airbag 11 is in operation, the gas inside is discharged through the air pump 5, and the airbag 11 contracts back to its initial state so that the next filling operation can be carried out. This improves the working efficiency and reliability of the filling device, and also ensures the stable operation of the anti-overflow component.
[0031] like Figure 2 , Figure 3 , Figure 5 As shown, the vibrating component includes a vibrator 12, which is fixedly connected to the outside of the dispensing pump 13. During use, when the glue is injected into the buried via from the dispensing pump 13 during the glue filling process, the vibrator 12 is activated simultaneously. The vibration generated by the vibrator 12 keeps the glue in a "dynamic" state at the outlet of the dispensing pump 13, preventing the glue from accumulating or clogging at the outlet and ensuring that the glue can flow into the buried via continuously and stably. Moreover, the vibration can also cause the glue to generate small fluctuations in the buried via, which helps to drive away air bubbles in the glue and make the glue fill the corners of the buried via more tightly, improving the quality and reliability of the glue filling, ensuring that the glue in the buried via is filled evenly and without air bubbles, thereby improving the overall performance of the HDI circuit board.
[0032] like Figure 2 , Figure 3As shown, a telescopic outer tube 6 is sleeved on the outside of the telescopic inner tube 15. An electric heating wire 16 is fixedly connected inside the telescopic outer tube 6, with one side of the electric heating wire 16 abutting against the outside of the telescopic outer tube 6. During use, when the glue enters the telescopic inner tube 15, the electric heating wire 16 is activated. The heat generated by the electric heating wire 16 is first transferred to the telescopic inner tube 15, raising its temperature. Then, the heat is transferred to the glue inside the telescopic inner tube 15 through heat conduction. Heating can reduce its viscosity, making it easier to flow, thereby improving the efficiency and quality of glue filling and bringing it to the most suitable viscosity range for glue filling. For example, in a cold working environment, the viscosity of the glue may increase significantly, making glue filling difficult. Activating the heating function of the electric heating wire 16 at this time can restore the glue to a suitable fluidity, ensuring the smooth progress of the glue filling process. It also helps the glue to better fill the buried hole, reducing problems such as air bubbles and uneven filling caused by poor glue fluidity.
[0033] like Figures 1-5 As shown, the telescopic outer tube 6, telescopic inner tube 15, and telescopic delivery tube 7 are all made of rubber. When in use, rubber has excellent elasticity and extensibility, which allows the telescopic outer tube 6, telescopic inner tube 15, and telescopic delivery tube 7 to flexibly adapt to various position changes and dynamic needs during device operation. For example, when the micro hydraulic cylinder 8 pushes the glue transfer box 10 up and down, the telescopic outer tube 6 and telescopic inner tube 15 can extend or retract accordingly without breaking or deforming, ensuring stable glue transmission and normal operation of the heating function for the heating wire 16 inside the telescopic outer tube 6. Similarly, the telescopic delivery tube 7, in the connection between the air pump 5 and the air bag 11, can also easily cope with position changes caused by glue filling operations, ensuring smooth gas delivery and maintaining the anti-overflow function of the air bag 11.
[0034] The working principle of this utility model is as follows: In use, the HDI is placed inside the fixed slot 9, and then the transmission group is started. When the transmission group starts working, it can precisely control the movement of the rectangular plate 14 in the horizontal direction. One end of the rectangular plate 14 is connected to the outer side of the transmission group, and the other end is slidably connected to the outer side of the limiting rod 18. This design ensures that the rectangular plate 14 can move smoothly and accurately along the limiting rod 18 under the drive of the transmission group, thereby achieving precise adjustment of the filling position and accurately positioning it above the HDI buried hole that needs filling. When the rectangular plate 14 reaches the predetermined position, the micro hydraulic cylinder 8 starts operating. The micro hydraulic cylinder 8 can push the glue transfer tank 10 downwards, causing the glue injector 13 to gradually approach the HDI buried hole for filling. Then, the glue in the glue storage tank 4 is transferred to the glue injector 13 through the telescopic inner tube 15 and the glue transfer tank 10, and then sprayed out by the glue injector 13. During the filling process, when the glue in the glue injector 13 is injected into the HDI buried hole...
[0035] During the injection process, the anti-overflow device is activated, which effectively prevents the glue from overflowing, avoiding glue waste and pollution or adverse effects on the surrounding environment and other components. This ensures a clean and efficient glue filling process. After the glue filling is completed, the vibration device is activated. The vibration generated by the device allows the glue to be filled into the buried holes more evenly during the injection process, reducing the generation of air bubbles inside the glue, improving the quality and reliability of the glue filling, and ensuring that the glue filling effect in the buried holes meets the production requirements. This, in turn, guarantees the performance and quality of the entire HDI circuit board.
[0036] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A novel HDI buried via PP grommet evaluation apparatus, characterized by: The utility model provides a kind of glue injection device, including bottom plate (1), the fixed groove (9) is opened on the bottom plate (1), the support (2) is fixedly connected on the bottom plate (1) upside, the support (2) is composed of four vertical poles and two cross bars, two The cross bar opposite side is set to open type, one of the cross bar is installed transmission group, another cross bar is fixedly connected with limit rod (18), the transmission group outside is connected with rectangular plate (14) in transmission, rectangular plate (14) is slidably connected on limit rod (18) outside away from transmission one end, the micro hydraulic cylinder (8) is fixedly connected on rectangular plate (14) downside, the micro hydraulic cylinder (8) is fixedly connected with glue transfer box (10) downside, rectangular plate (14) upside is screwed with glue storage tank (4), the glue storage tank (4) is fixedly connected retractable inner tube (15) downside, retractable inner tube (15) extends to glue storage tank (4) inside, retractable inner tube (15) is fixedly connected with glue transfer box (10) one end, glue transfer box (10) downside is fixedly connected with glue injector (13), glue injector (13) outside is fixedly connected with anti-overflow piece and vibration piece respectively. The transmission group includes servo motor (3), the servo motor (3) is fixedly connected on the side of cross bar, the screw rod (17) is rotatably connected in the cross bar, the screw rod (17) one end extends to the outside of cross bar and is fixedly connected with servo motor (3) output end.
2. The novel HDI buried hole PP glue filling device according to claim 1, characterized in that: The anti-overflow piece includes air pump (5), the air pump (5) is fixedly connected on the upside of rectangular plate (14), the air pump (5) downside is fixedly connected with retractable conveying pipe (7), the retractable conveying pipe (7) extends to air pump (5) inside, the retractable conveying pipe (7) is fixedly connected with air bag (11) away from air pump (5) one end, the air bag (11) is fixedly connected on the outside of glue injector (13).
3. The novel HDI buried hole PP glue filling device according to claim 1, characterized in that: The vibration piece includes vibrator (12), the vibrator (12) is fixedly connected on the outside of glue injector (13).
4. The novel HDI buried hole PP glue filling device according to claim 1, characterized in that: The retractable inner tube (15) outside is sleeved with retractable outer tube (6), the electric heating wire (16) is fixedly connected in the retractable outer tube (6), the electric heating wire (16) one side is abutted with retractable outer tube (6) outside.
5. The novel HDI buried hole PP glue filling device according to claim 1, characterized in that: The retractable outer tube (6), retractable inner tube (15) and retractable conveying pipe (7) are all of rubber material.
6. The novel HDI buried hole PP glue filling device according to claim 5, characterized in that: