Device for guaranteeing stability of automatic adding overflow of HDI (High Density Interconnect) product of PCB (Printed Circuit Board)

Abstract

The utility model relates to the technical field of PCBs (printed circuit boards), and discloses a device for guaranteeing the stability of automatic adding overflow of HDI (high density interconnect) products of PCBs, which comprises a liquid medicine bin, a top cover plate is fixedly connected to the upper top end of the liquid medicine bin, and the upper top end of the top cover plate penetrates into the liquid medicine bin and is fixedly connected with a liquid medicine adding pipe for adding medicine. According to the utility model, the aeration mechanism is arranged, the medicament is added into the medicament bin through the medicament adding pipe, and the medicament exists in the medicament bin, so that when the density of the new medicament is smaller than that of the original medicament, the new medicament is extruded to the surface after being in contact with the original medicament, and the bath solution cannot be replaced; at the moment, an aeration mechanism can be adopted to accelerate mixing of chemicals in the chemical bin, so that the density between the new chemicals and the original chemicals is rapidly changed, and the situation that the density of the new chemicals is too low, the new chemicals are squeezed to the surface by the original chemicals, the new chemicals are discharged and cannot be replaced, and the processing quality of products is affected is avoided.

Description

A device to ensure stable automatic overflow in HDI products on PCB boards Technical Field

[0001] This utility model relates to the field of PCB board technology, specifically to a device for ensuring the stability of automatic overflow addition in HDI products on PCB boards. Background Technology

[0002] In the PCB board HDI product processing, process chemicals are key elements to ensure product quality and production efficiency. With the rapid development of electronic technology, PCB board HDI products are constantly evolving towards high integration, small line width and spacing, and multi-layering. This places more stringent requirements on the processing technology, and process chemicals play an indispensable role in this process. In many stages of PCB board HDI processing, such as copper plating, electroplating, and etching, specific process chemicals are required to achieve the corresponding chemical reactions in order to form the required circuit patterns and conductive layers.

[0003] In the field of PCB HDI product processing, process chemicals play a crucial role in each production stage. Their quality and stability directly affect the final product quality. During processing, new chemicals need to be continuously added to the chemical bath to maintain the effective components and performance of the chemicals. However, existing technologies have some shortcomings. When the density of the newly added chemical is less than that of the existing chemical in the bath, due to the density difference, the new chemical will be squeezed to the surface of the chemical bath and easily discharged from the overflow port. It is difficult to mix it fully with the existing chemical, which leads to the inability of the bath solution to be properly replaced. This prevents the new chemical from effectively participating in the reaction and achieves chemical renewal, seriously affecting the processing quality of PCB HDI products. It may lead to problems such as substandard circuit performance and decreased product yield. Therefore, those skilled in the art provide a device to ensure the stability of the automatic overflow of PCB HDI products to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this utility model is to provide a device that ensures the stability of automatic overflow addition in HDI products on PCB boards, thereby solving the problems mentioned in the background art above.

[0005] This utility model provides the following technical solution: a device for ensuring stable automatic overflow of HDI products on PCB boards, comprising a chemical tank, a top cover plate fixedly connected to the top of the chemical tank, a chemical addition pipe for adding chemicals fixedly connected to the top of the top cover plate extending into the interior of the chemical tank, an overflow pipe for discharging excess chemicals fixedly connected inside the chemical tank, the discharge end of the overflow pipe extending to the outer wall of the chemical tank, a control valve installed at the extension end of the overflow pipe, an aeration mechanism for increasing the mixing degree of chemicals provided on the inner side wall of the chemical tank, and a self-resetting mechanism provided at the overflow end of the overflow pipe.

[0006] Preferably, the aeration mechanism includes an aeration fan fixedly connected to the outer wall of the medicine tank, a connecting air pipe fixedly connected to the gas discharge end of the aeration fan, the connecting air pipe extending into the interior of the medicine tank, a pressure gauge installed at the gas pressure detection end of the aeration fan, an aeration pipe provided on the inner wall of the medicine tank, and the end of the connecting air pipe away from the aeration fan connected to the air inlet end of the aeration pipe.

[0007] Preferably, the outer wall of the aeration pipe is provided with several aeration holes to facilitate gas discharge, and the connection end between the connecting pipe and the aeration pipe is equipped with a gas distributor.

[0008] Preferably, the inner wall of the medicine tank is fixedly connected to the outer wall of the aeration pipe with a protective frame, the outer wall of the protective frame is fixedly connected to a screen for filtering drug impurities, and the outer wall of the aeration pipe is symmetrically fixedly connected to four mounting brackets, which are fixedly connected to the inner wall of the medicine tank.

[0009] Preferably, the self-resetting mechanism includes a lower fixing sleeve fixedly connected to the outer wall of the overflow pipe, the overflow end of the overflow pipe is provided with a flow-blocking shroud, the outer wall of the flow-blocking shroud is fixedly connected with four first fixing brackets in a ring array, the outer wall of the lower fixing sleeve is symmetrically fixedly connected with two second fixing brackets, and two sets of magnetic blocks are fixedly connected to the side of each of the two second fixing brackets opposite to the two first fixing brackets.

[0010] Preferably, a connecting frame is fixedly connected to the side of the two first fixed brackets away from the magnetic block, and a connecting frame is symmetrically fixedly connected to the bottom end of the top cover plate, wherein a tension spring is fixedly sleeved on the inner wall of the two connecting frames, and a guide sleeve is fixedly connected to the top end of the other two first fixed brackets.

[0011] Preferably, two guide rods are symmetrically fixedly connected to the bottom end of the top cover plate, and the two guide rods are slidably sleeved inside the two guide sleeves. A pull rope is fixedly connected to the center of the top top of the flow deflector, and the pull rope extends to the top top of the top cover plate. A pull ball is fixedly connected to the extended end of the pull rope.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention incorporates an aeration mechanism. The agent is added to the inside of the chemical tank through a chemical addition pipe. Since the tank already contains other chemicals, if the density of the new agent is less than that of the original agent, the new agent will be squeezed to the surface upon contact with the original agent, preventing the tank solution from being replaced. The aeration mechanism accelerates the mixing of the chemicals inside the tank, rapidly changing the density between the new and original agents. This prevents the new agent from being too low in density and being squeezed to the surface by the original agent, causing it to be discharged and unable to be replaced, thus affecting the processing quality of the product.

[0014] Meanwhile, a self-resetting mechanism is installed at the overflow end of the overflow pipe. When excess medicine needs to be discharged, the pull rope and pull ball can be pulled to drive the flow barrier to rise. At this time, the overflow end of the overflow pipe opens, which can effectively discharge excess medicine. When the pull rope is released, the tension spring will automatically reset due to the elasticity, thereby driving the flow barrier to re-fit with the lower fixed sleeve. They are also attracted to each other by two magnetic blocks to increase the connection between the two. Furthermore, the guiding effect of the flow barrier and the lower fixed sleeve can be increased by the guidance of the guide rod and the guide sleeve. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of a device for ensuring stable automatic overflow in HDI products on PCB boards;

[0016] Figure 2 is a schematic diagram of the overall side structure of a device for ensuring the stability of automatic overflow addition in HDI products on PCB boards;

[0017] Figure 3 is a schematic diagram of the structure of the medicine water tank in a device for ensuring stable automatic overflow of HDI products on PCB boards.

[0018] Figure 4 is a schematic diagram of the medicine water tank in a device for ensuring stable automatic overflow of HDI products on PCB boards, viewed from below.

[0019] Figure 5 is a schematic diagram of the aeration mechanism in a device that ensures stable automatic overflow of HDI products on PCB boards.

[0020] Figure 6 is an enlarged structural diagram of point A in Figure 4.

[0021] Legend:

[0022] 1. Chemical tank; 2. Top cover; 3. Overflow pipe; 4. Control valve; 5. Aeration mechanism; 51. Aeration fan; 52. Pressure gauge; 53. Connecting air pipe; 531. Aeration pipe; 532. Diverter; 533. Aeration hole; 54. Protective frame; 55. Screen; 56. Mounting bracket; 6. Self-resetting mechanism; 61. Flow baffle; 611. First fixed bracket; 62. Lower fixed sleeve; 621. Second fixed bracket; 622. Magnetic block; 63. Connecting frame; 64. Tension spring; 65. Guide sleeve; 66. Guide rod; 67. Pull rope; 68. Pull ball; 7. Chemical addition pipe. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please refer to Figures 1-6. This utility model provides a technical solution: a device for ensuring the stability of automatic overflow of HDI products on PCB boards, including a chemical tank 1, a top cover plate 2 fixedly connected to the top end of the chemical tank 1, a chemical addition pipe 7 for adding chemicals fixedly connected to the top end of the top cover plate 2 through the interior of the chemical tank 1, an overflow pipe 3 for discharging excess chemicals fixedly connected inside the chemical tank 1, the discharge end of the overflow pipe 3 extending to the outer wall of the chemical tank 1, a control valve 4 installed at the extension end of the overflow pipe 3, an aeration mechanism 5 for increasing the mixing degree of chemicals provided on the inner side wall of the chemical tank 1, and a self-resetting mechanism 6 provided at the overflow end of the overflow pipe 3.

[0025] It should be noted that the liquid addition pipe 7 penetrates through the top cover plate 2 into the interior of the liquid tank 1, facilitating accurate addition of the agent and ensuring that the agent can smoothly enter the liquid tank 1 to meet production needs. The overflow pipe 3 can promptly discharge excess agent, avoiding problems such as overflow due to excessive agent in the liquid tank 1, ensuring a safe and stable production environment. Furthermore, its discharge end extends to the outer wall of the liquid tank 1 and is equipped with a control valve 4, which can flexibly control the amount of agent discharged to adapt to different production conditions. The aeration mechanism 5 is located on the inner wall of the liquid tank 1, which can increase the mixing degree of the agent in the liquid tank 1, making the agent distribution more uniform, improving the agent's effectiveness, and thus improving the quality of PCB board HDI products. The self-resetting mechanism 6 is located at the overflow end of the overflow pipe 3. When the overflow ends, it can automatically restore the overflow pipe 3 to its initial state, ensuring the stability and reliability of the overflow function, reducing manual intervention, and improving the degree of production automation.

[0026] As one embodiment of this example, please refer to Figures 2-4. The aeration mechanism 5 includes an aeration fan 51 fixedly connected to the outer wall of the medicine tank 1. A connecting air pipe 53 is fixedly connected to the gas discharge end of the aeration fan 51. The connecting air pipe 53 extends into the interior of the medicine tank 1. A pressure gauge 52 is installed at the gas pressure detection end of the aeration fan 51. An aeration pipe 531 is provided on the inner wall of the medicine tank 1. The end of the connecting air pipe 53 away from the aeration fan 51 is connected to the air inlet end of the aeration pipe 531. Several aeration holes 533 are opened on the outer wall of the aeration pipe 531 to facilitate gas discharge. A gas diverter 532 is installed at the connection end between the connecting air pipe 53 and the aeration pipe 531.

[0027] It should be noted that the aeration blower 51 is fixed to the outer wall of the chemical tank 1, providing a stable power source for aeration, ensuring the continuity and reliability of gas supply, and guaranteeing smooth aeration operations. The pressure gauge 52 is installed at the gas pressure detection end of the aeration blower 51, enabling real-time monitoring of gas pressure. This allows operators to promptly grasp the aeration pressure situation and easily adjust the aeration intensity according to actual production needs, avoiding any impact on aeration effect due to abnormal pressure, thereby ensuring product quality. The air pipe 53 connects the aeration blower 51 to the inside of the chemical tank 1. The aeration pipe 531 is connected to the aeration pipe 531 to achieve stable gas transmission and ensure that the gas enters the interior of the medicine tank 1 smoothly. The distributor 532 is installed at the connection end of the air pipe 53 and the aeration pipe 531. It can reasonably divide the gas and distribute the gas evenly to each part of the aeration pipe 531 to improve the uniformity of aeration. Several aeration holes 533 opened on the outer wall of the aeration pipe 531 can refine the gas and discharge it, increase the contact area between the gas and the agent, effectively enhance the mixing effect of the agent, make the agent components more evenly distributed, and improve the efficiency of agent use.

[0028] As one embodiment of this example, please refer to Figures 3 and 5. A protective frame 54 is fixedly connected to the inner wall of the medicine tank 1, which is located on the outer wall of the aeration pipe 531. A screen 55 for filtering drug impurities is fixedly connected to the outer wall of the protective frame 54. Four mounting brackets 56 are symmetrically fixedly connected to the outer wall of the aeration pipe 531, and the four mounting brackets 56 are fixedly connected to the inner wall of the medicine tank 1.

[0029] It should be noted that in the complex production environment of the chemical tank 1, the screen 55 can effectively prevent the aeration pipe 531 from being damaged by collisions or scratches from external objects, extend the service life of the aeration pipe 531, reduce equipment maintenance costs and replacement frequency, and ensure production continuity. During the mixing process of the chemicals, some impurities will inevitably be mixed in. The screen 55 can intercept these impurities, preventing them from entering the aeration pipe 531 or adhering to the aeration holes 533, avoiding blockage of the aeration holes 533, ensuring that the gas can be discharged smoothly, maintaining stable aeration effect, ensuring the uniformity of chemical mixing, and thus improving the production quality of PCB board HDI products.

[0030] As one embodiment of this example, please refer to Figures 4 and 6. The self-resetting mechanism 6 includes a lower fixing sleeve 62 fixedly connected to the outer wall of the overflow pipe 3. The overflow end of the overflow pipe 3 is provided with a flow-blocking shroud 61. Four first fixing brackets 611 are fixedly connected to the outer wall of the flow-blocking shroud 61 in a ring array. Two second fixing brackets 621 are symmetrically fixedly connected to the outer wall of the lower fixing sleeve 62. Two sets of magnetic blocks 622 are fixedly connected to the side of each of the two second fixing brackets 621 opposite to the two first fixing brackets 611. A connecting frame 63 is fixedly connected to the side of each of the two first fixing brackets 611 away from the magnetic blocks 622. The lower bottom end of the top cover plate 2 is symmetrically fixedly connected to the connecting frame 63. A tension spring 64 is fixedly sleeved on the inner wall of each of the two connecting frames 63. A guide sleeve 65 is fixedly connected to the upper top of each of the other two first fixing brackets 611.

[0031] It should be noted that the lower fixing sleeve 62 is fixed to the outer wall of the overflow pipe 3, providing a stable installation base for the entire self-resetting mechanism 6, ensuring that all components of the mechanism can function normally. The four first fixing brackets 611 are fixed in a ring array to the outer wall of the flow-blocking cover 61, and cooperate with the two second fixing brackets 621 that are symmetrically fixed to the outer wall of the lower fixing sleeve 62. The flow-blocking cover 61 and the lower fixing sleeve 62 are initially connected and positioned by two sets of magnetic blocks 622. During overflow, the flow-blocking cover 61 may be displaced due to pressure changes, and the magnetic blocks 622 can limit its excessive displacement to a certain extent, playing a buffering and stabilizing role. The two first fixing brackets 611 are connected to the connecting brackets 63 that are symmetrically fixed to the bottom of the top cover plate 2 through the connecting brackets 63, and tension springs 64 are fixedly sleeved on the inner wall of two of the connecting brackets 63. When the overflow ends, the elastic force of the tension springs 64 can automatically pull the flow-blocking cover 61 back to the initial position, realizing the self-resetting function.

[0032] As one embodiment of this example, please refer to Figures 4 and 6. Two guide rods 66 are symmetrically fixedly connected to the bottom end of the top cover plate 2. The two guide rods 66 are slidably sleeved inside the two guide sleeves 65. A pull rope 67 is fixedly connected to the center of the top top of the flow deflector 61. The pull rope 67 extends to the top top of the top cover plate 2, and a pull ball 68 is fixedly connected to the extended end of the pull rope 67.

[0033] It should be noted that when the baffle 61 is displaced due to overflow, the guide rod 66 slides inside the guide sleeve 65, which can effectively prevent the baffle 61 from shifting or shaking during movement, ensuring that it always moves in the correct direction, thereby ensuring the smoothness and stability of the entire overflow process. The pull rope 67 fixed at the center of the top of the baffle 61 extends to the top of the top cover plate 2, and the extended end is fixedly connected to the pull ball 68, providing the operator with a means of manual intervention.

[0034] Working principle: During the process of ensuring the stability of automatic overflow of HDI products on PCB boards, the reagent is added into the reagent tank 1 through the reagent addition pipe 7. Since there is a pre-existing reagent in the reagent tank 1, when the density of the new reagent is less than that of the original reagent, the new reagent will be squeezed to the surface, which will prevent the bath liquid from being replaced and affect the effectiveness of the new reagent. At this time, the aeration mechanism 5 plays a role, the aeration fan 51 runs, and the gas enters the aeration pipe 531 through the connecting air pipe 53. The distributor 532 reasonably distributes the gas to each aeration hole 533 for discharge, which accelerates the mixing of the reagent in the reagent tank 1, so that the density of the new reagent and the original reagent change rapidly. This prevents the new reagent from being squeezed to the surface and discharged due to its low density, ensuring that the new reagent effectively participates in the reaction and improves the product processing quality.

[0035] Meanwhile, the protective frame 54 and screen 55 protect the aeration pipe 531 and filter chemical impurities. The mounting bracket 56 stabilizes the position of the aeration pipe 531. When there is too much chemical in the chemical tank 1 and the excess chemical needs to be discharged, the self-resetting mechanism 6 is activated, pulling the pull ball 68 and the pull rope 67, which drives the flow-blocking hood 61 to rise. The force between the magnetic blocks 622 is weakened, the overflow end of the overflow pipe 3 is opened, and the excess chemical is discharged. After the pull rope 67 is released, the tension spring 64 automatically resets due to its elasticity, causing the flow-blocking hood 61 to re-fit with the lower fixed sleeve 62. The two sets of magnetic blocks 622 attract each other, enhancing their connection. The guide rod 66 slides in the guide sleeve 65, providing good guidance for the flow-blocking hood 61 and the lower fixed sleeve 62, ensuring stable operation of the device.

[0036] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A device for ensuring stable automatic overflow of HDI products on PCB boards, comprising a chemical tank (1), characterized in that: A top cover plate (2) is fixedly connected to the top end of the medicine tank (1). A medicine addition pipe (7) for adding medicine is fixedly connected to the top end of the top cover plate (2) through the inside of the medicine tank (1). An overflow pipe (3) for discharging excess medicine is fixedly connected inside the medicine tank (1). The discharge end of the overflow pipe (3) extends to the outer wall of the medicine tank (1). A control valve (4) is installed at the extension end of the overflow pipe (3). An aeration mechanism (5) for increasing the mixing degree of medicine is provided on the inner side wall of the medicine tank (1). A self-resetting mechanism (6) is provided at the overflow end of the overflow pipe (3).

2. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 1, characterized in that: The aeration mechanism (5) includes an aeration fan (51) fixedly connected to the outer wall of the medicine tank (1). The gas discharge end of the aeration fan (51) is fixedly connected to a connecting air pipe (53). The connecting air pipe (53) extends into the interior of the medicine tank (1). A pressure gauge (52) is installed at the gas pressure detection end of the aeration fan (51). An aeration pipe (531) is provided on the inner wall of the medicine tank (1). The end of the connecting air pipe (53) away from the aeration fan (51) is connected to the air inlet end of the aeration pipe (531).

3. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 2, characterized in that: The outer wall of the aeration pipe (531) is provided with a number of aeration holes (533) to facilitate gas discharge, and the connection end of the connecting pipe (53) and the aeration pipe (531) is equipped with a gas divider (532).

4. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 3, characterized in that: The inner wall of the medicine tank (1) is fixedly connected to the outer wall of the aeration pipe (531) with a protective frame (54). The outer wall of the protective frame (54) is fixedly connected with a screen (55) for filtering drug impurities. The outer wall of the aeration pipe (531) is symmetrically fixedly connected with four mounting brackets (56), and the four mounting brackets (56) are fixedly connected to the inner wall of the medicine tank (1).

5. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 1, characterized in that: The self-resetting mechanism (6) includes a lower fixing sleeve (62) fixedly connected to the outer wall of the overflow pipe (3). The overflow end of the overflow pipe (3) is provided with a flow-blocking hood (61). The outer wall of the flow-blocking hood (61) is fixedly connected with four first fixing brackets (611) in a ring array. The outer wall of the lower fixing sleeve (62) is symmetrically fixedly connected with two second fixing brackets (621). Two sets of magnetic blocks (622) are fixedly connected to the side of each of the two second fixing brackets (621) opposite to the two first fixing brackets (611).

6. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 5, characterized in that: Two first fixed brackets (611) are fixedly connected to a connecting frame (63) on the side away from the magnetic block (622). The bottom end of the top cover plate (2) is symmetrically fixedly connected to the connecting frame (63). The inner walls of the two connecting frames (63) are fixedly sleeved with tension springs (64). The top ends of the other two first fixed brackets (611) are fixedly connected to guide sleeves (65).

7. The device for ensuring stable automatic overflow in HDI products on PCB boards according to claim 6, characterized in that: Two guide rods (66) are symmetrically fixedly connected to the bottom end of the top cover plate (2). The two guide rods (66) are slidably sleeved inside the two guide sleeves (65). A pull rope (67) is fixedly connected to the center of the top top of the flow deflector (61). The pull rope (67) extends to the top top of the top cover plate (2). A pull ball (68) is fixedly connected to the extended end of the pull rope (67).

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