A soaking device for PCB board

Abstract

The present application relates to the technical field of integrated circuit manufacturing, and particularly relates to a soaking device for PCB (Printed Circuit Board). The soaking device comprises a box body, a feeding roller set and a discharging roller set are installed on the box body, a soaking pool, a liquid storage pool and a power pool are arranged in the middle of the box body, a power roller set is arranged in the soaking pool in an inclined manner, a motor is installed in the box body, a rotating roller is rotatably connected in the power pool, an output shaft of the motor penetrates the power pool and is fixedly connected with the rotating roller, and the rotating roller is slidably connected with moving strips which are uniformly distributed in a circumferential direction. The power roller set in the soaking pool drives the PCB to move, and the rotating roller and the moving strips drive the liquid medicine to flow, so that the liquid medicine penetrates or bypasses the PCB to circulate, which not only solves the poor connection between different processes in the PCB production process, but also increases the processing efficiency of the PCB soaking process through structural design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of integrated circuit manufacturing, and particularly relates to a soaking device for a PCB. BACKGROUND

[0002] In the production process of a PCB, a plurality of processes for treating the PCB using different reagents are involved, such as pre-impregnation, etching, copper plating, cleaning and the like. However, the equipment and treatment methods used in different processes are significantly different. For example, the etching process and the cleaning process usually use conveying rollers to convey the PCB into a spraying chamber for spraying treatment, while the pre-impregnation process and the copper plating process usually use a hanging basket to place the PCB into a soaking pool for soaking treatment. This results in the need for frequent transfer of the PCB between different equipment in the production process, poor connection between processes, and difficulty in achieving full-process automatic control. In addition, in the existing soaking process, the PCB can only be slightly agitated in the soaking pool by the hanging basket to promote the mutual flow of the reagent around the PCB, thereby increasing the soaking treatment efficiency. However, this results in insufficient flow of the chemical reagent in the through holes and counterbores of the PCB, and low reagent exchange efficiency. When the concentration of the reagent around the PCB decreases with the reaction time, the treatment efficiency of the PCB will also decrease. This problem is particularly prominent in the copper plating process, which not only reduces the efficiency of the copper plating treatment of the PCB, but also affects the overall production efficiency of the PCB. SUMMARY

[0003] In order to overcome the shortcomings of poor process connection and low process efficiency such as copper plating in the production process of the PCB, the present application provides a soaking device for a PCB.

[0004] The technical implementation scheme of the present application is as follows: a soaking device for a PCB, comprising a box body, a feeding roller set and a discharging roller set are respectively installed at both ends of the box body, a soaking pool, a liquid storage pool and a power pool are arranged in the middle of the box body and are in communication with each other, a power roller set is arranged obliquely in the soaking pool, the power roller set is used for conveying the PCB, the communication part between the soaking pool and the liquid storage pool and the communication part between the soaking pool and the power pool are respectively located on both sides of the power roller set, the power pool is used for pumping the reagent in the liquid storage pool and conveying the reagent into the soaking pool, a motor is installed in the box body, a rotating roller is rotatably connected in the power pool, the output shaft of the motor penetrates the power pool and is fixedly connected with the rotating roller, a plurality of moving strips are uniformly distributed on the rotating roller and are slidably connected with the rotating roller, a first elastic member is arranged between the moving strips and the rotating roller, the moving strips are in contact with the power pool, and a swing mechanism is symmetrically arranged on the box body, the swing mechanism is used for switching the PCB between the horizontal state and the inclined state.

[0005] Preferably, the power pool is provided with a liquid inlet and a liquid outlet, the liquid inlet is communicated with the liquid storage pool, the lower part of the soaking pool is provided with an arc-shaped groove, the liquid outlet is communicated with the lower part of the arc-shaped groove, the soaking pool is fixedly connected with a limiting piece and a limiting baffle, the limiting baffle is located on the side of the arc-shaped groove close to the communication part between the soaking pool and the liquid storage pool, and the limiting piece and the limiting baffle are used for optimizing the liquid flow path together.

[0006] Preferably, the soaking pool is provided with a liquid guide surface, the liquid guide surface is located on the upper side of the arc-shaped groove, and the included angle between the liquid guide surface and the horizontal plane is greater than the included angle between the inclined surface where the power roller set is located and the horizontal plane.

[0007] Preferably, the arc-shaped groove is fixedly connected with longitudinally distributed baffles.

[0008] Preferably, the liquid storage pool is provided with a first baffle and a second baffle, the first baffle and the second baffle are both provided with spaced-apart through holes, the first baffle is located at the communication part between the soaking pool and the liquid storage pool, the second baffle divides the liquid storage pool into a liquid guide cavity and a liquid mixing cavity which are communicated with each other, the liquid guide cavity is communicated with the soaking pool through the first baffle, the liquid mixing cavity is communicated with the liquid inlet, and the liquid guide cavity is used for guiding the stable mixing of the liquid entering the liquid storage pool.

[0009] Preferably, the liquid mixing cavity is provided with spaced-apart bubble generators, spaced-apart liquid supplementing nozzles and spaced-apart gas-liquid separators, the positions of the liquid supplementing nozzles and the gas-liquid separators are both higher than the position of the communication part between the liquid mixing cavity and the liquid inlet.

[0010] Preferably, the liquid guide cavity is provided with a serpentine flow channel, the liquid guide cavity is provided with spaced-apart small vortex fans, and the serpentine flow channel of the liquid guide cavity is provided with spaced-apart sample detectors.

[0011] Preferably, the swinging mechanism comprises an electric push rod, the electric push rod is fixedly connected to the outer side of the box body, the telescopic end of the electric push rod is fixedly connected with a connecting piece, the connecting piece is fixedly connected with a connecting plate, the connecting plate is slidingly connected with a sliding plate, the sliding plate is hingedly connected with a rotating plate, the rotating plate is installed with a swinging roller set, and the swinging roller set is rotatably connected with the box body.

[0012] Preferably, the cleaning mechanism for removing the micro-bubbles attached to the PCB is further provided on the side of the box body close to the feeding roller set, the cleaning mechanism comprises a degassing pool, the degassing pool is communicated with the soaking pool, the degassing pool is provided with a transmission roller set on the inclined surface, the degassing pool is provided with an inclined surface, the degassing pool is provided with alternately distributed liquid injection ports on the inclined surface, and the liquid injection ports are communicated with the liquid outlet.

[0013] Preferably, the degassing tank is provided with auxiliary rotating wheels distributed at intervals.

[0014] The application has the advantages that: the application drives the PCB to move through the power roller group in the soaking tank, and drives the liquid flow through the rotating roller and the moving strip, so that the liquid penetrates or bypasses the PCB to circulate, which not only solves the poor connection between different processes in the PCB production process, but also increases the processing efficiency of the PCB soaking process through structural design, which is a breakthrough compared with the existing PCB soaking device.

[0015] The application limits the flow path and flow area of the liquid in the soaking tank through the limiting piece, the limiting baffle and the longitudinal baffle, and at the same time, the power tank outputs the liquid with fluctuating waves to the PCB, which can not only increase the mixing speed of the liquid and improve the replacement efficiency of the liquid near the PCB, but also increase the probability of the liquid entering the through hole and the blind hole on the PCB and improve the efficiency of copper deposition on the through hole and the blind hole on the PCB.

[0016] The application sprays the liquid to different positions of the PCB through the alternately distributed liquid injection ports, uses the pressure of the liquid impact on the PCB and the liquid flow to the outside of the PCB to clean the micro-bubbles attached to the PCB when it is soaked in the liquid, thereby increasing the efficiency of the subsequent soaking process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the application;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the discharge roller group and the soaking tank of the application;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the soaking tank and the liquid storage tank of the application;

[0020] Figure 4 It is a sectional view of the liquid storage tank and the power tank of the application;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the liquid storage tank of the application;

[0022] Figure 6 It is an enlarged view of A in the application; Figure 5

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the electric push rod and the connecting piece of the application;

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the swinging roller group of the application;

[0025] ​Figure 9 Fig. 3 is a schematic view of the state of the swing roller group after swinging according to the present application;

[0026] Figure 10 Fig. 4 is a schematic view of the three-dimensional structure of the degassing tank and the transmission roller group according to the present application;

[0027] Figure 11 Fig. 5 is a schematic view of the three-dimensional structure of the degassing tank and the liquid spraying port according to the present application;

[0028] Figure 12 Fig. 6 is a schematic view of the enlarged view of B in Fig. 5 according to the present application; Figure 11

[0029] In the above drawings: 1: box body, 2: feeding roller group, 3: discharging roller group, 4: soaking tank, 41: power roller group, 42: limiting piece, 43: limiting baffle, 44: longitudinal baffle, 401: arc-shaped groove, 402: liquid guide surface, 5: liquid storage tank, 51: first baffle, 52: second baffle, 53: bubble generator, 54: liquid supplementing nozzle, 55: gas-liquid separator, 56: small-sized vane fan, 57: sampling detector, 501: liquid guide cavity, 502: mixed liquid cavity, 6: power tank, 601: liquid inlet, 602: liquid outlet, 7: motor, 8: rotating roller, 9: moving strip, 10: electric push rod, 11: connecting piece, 12: connecting plate, 13: sliding plate, 14: rotating plate, 15: swing roller group, 16: degassing tank, 161: liquid spraying port, 17: transmission roller group, 18: auxiliary rotating wheel. DETAILED DESCRIPTION

[0030] The present application will now be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the application are shown. The application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of thorough and complete disclosure of the application and are fully contemplated by the inventor as coming within the scope of the application.

[0031] Embodiment 1: The present embodiment discloses a soaking device for PCB boards, which is used to solve the problem of poor connection between the existing PCB board soaking device and other PCB board production devices and the problem of low process efficiency such as copper deposition of the existing PCB board soaking device.

[0032] Referring to Figures 1-5 ​The utility model provides a kind of soaking device for PCB board, including box 1, the left and right ends of box 1 are respectively equipped with feeding roller group 2 and discharge roller group 3, the middle part of box 1 is equipped with mutually communicating soaking pool 4, liquid storage pool 5 and power pool 6, wherein soaking pool 4 is located in the upper portion of box 1, liquid storage pool 5 is located in the lower portion rear side of box 1, power pool 6 is located in the lower portion front side of box 1, power roller group 41 is arranged in soaking pool 4 and is inclined, power roller group 41 is used to transmit PCB board, the communicating place of soaking pool 4 and liquid storage pool 5 and the communicating place of soaking pool 4 and power pool 6 are respectively located in the two sides of power roller group 41, so that liquid medicine enters soaking pool 4 from power pool 6, and in the process of entering liquid storage pool 5 from soaking pool 4, liquid medicine flows from the lower side of PCB board to the upper side of PCB board, so as to increase the probability of liquid medicine passing through through-hole on PCB board, power pool 6 is used to draw liquid medicine in liquid storage pool 5, and deliver liquid medicine into soaking pool 4, motor 7 is installed in box 1, motor 7 is electrically connected with external control terminal, rotating roller 8 is rotatably connected in power pool 6, with reference to Figure 4 The rotating shaft of rotating roller 8 is eccentric relative to the central axis of power pool 6, the output shaft of motor 7 penetrates power pool 6 and is fixedly connected with rotating roller 8, rotating roller 8 is slidably connected with moving strip 9 which is uniformly distributed in circumferential direction, first elastic member is arranged between moving strip 9 and rotating roller 8, first elastic member is spring, moving strip 9 contacts with power pool 6, oscillating mechanism is arranged on box 1 and is symmetrically distributed, oscillating mechanism is used to drive PCB board to switch between horizontal state and inclined state, oscillating mechanism is electrically connected with control terminal.

[0033] In the above scheme, feeding roller group 2, discharge roller group 3 and power roller group 41 are all existing electric control transmission devices (mainly including motor, belt pulley, corrosion-resistant rubber material transport roller), feeding roller group 2, discharge roller group 3 and power roller group 41 are all double-row transmission rollers, and all of them are electrically connected with control terminal, feeding roller group 2 is located on the left side of box 1, discharge roller group 3 is located on the right side of box 1, feeding roller group 2 and discharge roller group 3 can be directly connected with conveying roller used in existing etching process and cleaning process, so as to form continuous automatic processing flow for pre-soaking, etching, copper plating and cleaning processes, the liquid level of liquid medicine in box 1 is lower than the height of feeding roller group 2 and discharge roller group 3, the volume of liquid storage pool 5 is greater than or equal to the sum of the volume of soaking pool 4 and the volume of power pool 6, so as to improve the replacement frequency of liquid medicine in soaking pool 4 and power pool 6, slow down the flow speed of liquid medicine in liquid storage pool 5, facilitate staff to monitor the concentration of liquid medicine in liquid storage pool 5 and supplement liquid medicine in liquid storage pool 5 in time, the structure composed of power pool 6, rotating roller 8 and moving strip 9 is similar to rotary vane pump, and its working principle is the same as that of rotary vane pump.

[0034] Preferably, with reference to Figures 2-4, the power pool 6 is provided with a liquid inlet 601 and a liquid outlet 602, the liquid inlet 601 is located at the lower part of the power pool 6, the liquid outlet 602 is located at the upper part of the power pool 6, the liquid inlet 601 is communicated with the liquid storage pool 5, the lower part of the soaking pool 4 is provided with an arc-shaped groove 401, the liquid outlet 602 is communicated with the lower part of the arc-shaped groove 401, the thickness of the moving strip 9 is greater than the width of the communication part between the liquid inlet 601 and the power pool 6 and the width of the communication part between the liquid outlet 602 and the power pool 6, so the moving strip 9 cannot extend into the liquid inlet 601 and the liquid outlet 602, the soaking pool 4 is fixedly connected with a limiting piece 42 and a limiting baffle 43, the limiting baffle 43 is located at one side of the arc-shaped groove 401 close to the communication part between the soaking pool 4 and the liquid storage pool 5, and the limiting piece 42 and the limiting baffle 43 are used for optimizing the liquid flow path.

[0035] Preferably, referring to Figure 4 , the soaking pool 4 is provided with a liquid guide surface 402, the liquid guide surface 402 is located at the upper side of the arc-shaped groove 401, the included angle between the liquid guide surface 402 and the horizontal plane is greater than the included angle between the inclined plane where the power roller group 41 is located and the horizontal plane, so as to gradually reduce the distance between the liquid guide surface 402 and the plane where the PCB board is located from bottom to top, so that the pressure of the liquid flowing through the gap between the two gradually increases with the increase of the width of the PCB board, and then the probability of the liquid penetrating the PCB board above the liquid guide surface 402 is improved.

[0036] Preferably, referring to Figure 4 , the arc-shaped groove 401 is fixedly connected with longitudinally distributed spacing baffles 44, the spacing between the two adjacent longitudinally distributed spacing baffles 44 is less than half of the length of the PCB board, so as to increase the effect of the longitudinally distributed spacing baffles 44 on hindering the left and right flow of the liquid.

[0037] In the above scheme, the limiting piece 42 is used to reduce the volume of the soaking pool 4, so as to plan the flow path of the liquid, increase the utilization rate of the liquid and the efficiency of the liquid replacement near the PCB board, the arc-shaped groove 401 is in an inclined state as a whole, the upper part of the arc-shaped groove 401 and the lower part of the liquid guide surface 402 are connected with each other, and the arc-shaped groove 401 and the liquid guide surface 402 are both located below the power roller group 41, the limiting baffle 43 is used to separate the path of the liquid flowing from the lower side of the power roller group 41 to the back, and the longitudinally distributed spacing baffles 44 are used to block the path of the liquid flowing along the left and right sides, so that the liquid below the PCB board can only flow through the through hole on the PCB board or pass through the liquid guide surface 402 on the upper side of the PCB board to flow to the upper side of the PCB board, and finally enter the liquid storage pool 5.

[0038] Preferably, referring to Figures 3-5The first baffle plate 51 and the second baffle plate 52 are provided in the storage pool 5, and the first baffle plate 51 and the second baffle plate 52 are both provided with through holes distributed at intervals. The first baffle plate 51 is located at the communication position of the soaking pool 4 and the storage pool 5. The second baffle plate 52 divides the storage pool 5 into a liquid guiding cavity 501 and a mixed liquid cavity 502 which are in communication with each other. The liquid guiding cavity 501 is in communication with the soaking pool 4 through the first baffle plate 51. The mixed liquid cavity 502 is in communication with the liquid inlet 601. The liquid guiding cavity 501 is used for guiding the stable mixing of the liquid medicine entering the storage pool 5, so as to facilitate the detection of the concentration of the liquid medicine by the staff. According to the detection result, the staff supplements the high-concentration liquid medicine into the mixed liquid cavity 502.

[0039] Preferably, referring to Figures 4-6 , the mixed liquid cavity 502 is provided with bubble generators 53, liquid supplementing nozzles 54 and gas-liquid separators 55 which are distributed at intervals. The positions of the liquid supplementing nozzles 54 and the gas-liquid separators 55 are all higher than the position of the communication position of the mixed liquid cavity 502 and the liquid inlet 601.

[0040] Preferably, referring to Figures 4-6 , the liquid guiding cavity 501 is provided with a serpentine flow channel. The liquid guiding cavity 501 is provided with small vortex fans 56 which are distributed at intervals near the inlet of the serpentine flow channel. The serpentine flow channel of the liquid guiding cavity 501 is provided with sampling detectors 57 which are distributed at intervals.

[0041] In the above scheme, referring to Figure 4 and Figure 5 , the first bending position of the serpentine flow channel is located at the front side of the left part of the liquid guiding cavity 501 in Figure 5 . The last bending position of the serpentine flow channel is located at the rear side of the right part of the liquid guiding cavity 501 in Figure 5 . Therefore, the flow area of the through holes on the first baffle plate 51 gradually increases from front to back (with the direction in Figure 5 as the reference). The flow area of the through holes on the second baffle plate 52 gradually decreases from front to back, so as to relatively balance the liquid flow of different positions when the liquid enters or flows out of the serpentine flow channel, reduce the difference between the liquid flow of the front and rear ends, improve the representativeness of the concentration sample of the detected liquid in the serpentine flow channel, improve the calculation accuracy of the staff when calculating the subsequent liquid medicine adding, the bubble generators 53 are in communication with the external gas supply system. The bubble generators 53 increase the mixing efficiency of the liquid medicine in the mixed liquid cavity 502 and the newly added high-concentration liquid medicine by introducing gas into the mixed liquid cavity 502, so as to promote the rapid and uniform mixing of liquid medicine with different concentrations, thereby ensuring that the concentration of the liquid medicine used in the soaking pool 4 is always in a relatively stable state, and further ensuring that the standard of the processing process is always above the qualified standard.

[0042] Preferably, referring to Figure 2 , Figure 3 and Figures 7-9The swing mechanism includes an electric push rod 10, which is electrically connected to a control terminal. The electric push rod 10 is fixed to the outside of the housing 1. A connector 11 is fixed to the telescopic end of the electric push rod 10. A connecting plate 12 is fixed to the connector 11. A sliding plate 13 is slidably connected to the front side of the connecting plate 12. A rotating plate 14 is hinged to the front side of the sliding plate 13. A swing roller assembly 15 is mounted on the rotating plate 14. The swing roller assembly 15 is electrically connected to the control terminal and is rotatably connected to the housing 1.

[0043] In the above scheme, the oscillating roller group 15 is an existing electrically controlled transmission device (its specific structure is similar to that of the powered roller group 41, also a double-row drive roller). The total stroke of the oscillating roller group 15 conveying the PCB board can be adjusted according to the actual production situation. When the rear side of the oscillating roller group 15 swings to the lowest side, its inclined plane is the same as that of the powered roller group 41. When the rear side of the oscillating roller group 15 swings to the highest side, its horizontal plane is the same as that of the feeding roller group 2 and the discharging roller group 3. (Refer to...) Figure 1 The left swing roller group 15 is initially in a horizontal state when not in operation, and the right swing roller group 15 is initially in an inclined state when not in operation.

[0044] The working principle of the above scheme is as follows:

[0045] The operator first places the PCB board on the feeding roller group 2 (or it is conveyed to the feeding roller group 2 by the conveyor roller group in other production steps). Then, the operator synchronously starts the feeding roller group 2, the discharging roller group 3, the power roller group 41, the motor 7, and the two sets of swing roller groups 15 through the control terminal. The feeding roller group 2 conveys the PCB board to the right onto the left swing roller group 15. When the PCB board has completely moved onto the swing roller group 15, the control terminal closes the left swing roller group 15 and controls the telescopic end of the left electric push rod 10 to retract downwards. The telescopic end of the electric push rod 10 drives the connecting piece 11, the connecting plate 12, the sliding plate 13, and the rotating plate 14 to move downwards together. The sliding plate 13 relative to the... The connecting plate 12 slides forward, and the sliding plate 13 and the rotating plate 14 rotate relative to each other. At this time, the left swing roller group 15 gradually swings downward until the swing roller group 15 swings to the lowest point of its stroke (that is, its inclined plane is the same as the inclined plane of the power roller group 41). The control terminal closes the electric push rod 10 and starts the left swing roller group 15. The swing roller group 15 continues to transport the PCB board to the right until the PCB board leaves the swing roller group 15 and enters the power roller group 41. The control terminal controls the telescopic end of the left electric push rod 10 to move upward and reset. The telescopic end of the electric push rod 10 drives the connecting piece 11, the connecting plate 12, the sliding plate 13 and the rotating plate 14 to move and reset together.

[0046] If the swing roller group 15 needs to be in the starting state during the production process, the total stroke of the swing roller group 15 needs to be increased to ensure that the rightmost side of the PCB does not move above the power roller group 41 before the swing roller group 15 stops swinging.

[0047] When the PCB enters the power roller group 41, the power roller group 41 continues to convey the PCB to the right. Because the PCB is always in an inclined state, the PCB gradually moves downward to the position where it contacts the limiting baffle 43. During this process, the motor 7 always drives the rotating roller 8 to rotate. During the rotation of the rotating roller 8, the moving strip 9 on it is always in contact with the power pool 6 under the action of the first elastic member. At this time, the power pool 6, the rotating roller 8, and the adjacent two moving strips 9 together form a cavity with a constantly changing volume (the power pool 6, the rotating roller 8, and the moving strip 9 can be regarded as an existing rotary vane pump, and its working principle is the same as that of the existing rotary vane pump). When the cavity is in communication with the liquid inlet 601, as the rotating roller 8 continuously rotates, the volume of the cavity continuously increases, thereby sucking the liquid medicine in the mixing liquid chamber 502 through the liquid inlet 601. When the cavity is in communication with the liquid outlet 602, as the rotating roller 8 continuously rotates, the volume of the cavity continuously decreases, thereby delivering the liquid medicine to the arc-shaped groove 401 through the liquid outlet 602.

[0048] After the liquid medicine enters the arc-shaped groove 401, taking the position of the PCB as an example, the liquid medicine is just below the PCB, and because the gap between the limiting baffle 43 and the PCB is small (or the two are in direct contact), it blocks the path of the liquid medicine flowing directly to the right, and the longitudinal baffle 44 blocks the liquid medicine from flowing to the left and right sides. Therefore, the liquid medicine only has three flow paths: through the gap between the PCB and the adjacent longitudinal baffle 44, through the through hole on the PCB, and through the gap between the PCB and the liquid guide surface 402. Because the flow areas of the three flow paths are limited, the flow pressure of the liquid medicine in the three flow paths increases during the continuous delivery of the liquid medicine from the power pool 6 to the soaking pool 4, thereby increasing the probability of the liquid medicine passing through the through hole on the PCB and indirectly increasing the flow rate of the liquid medicine flowing outward from the lower side of the PCB, thereby indirectly increasing the replacement speed of the liquid medicine on the lower side of the PCB.

[0049] During the above process of the liquid medicine entering the soaking pool 4 from the power pool 6, because the volume of the cavity composed of the power pool 6, the rotating roller 8, and the adjacent two moving strips 9 does not change uniformly, the amount of liquid medicine entering the soaking pool 4 is always in a state of constant fluctuation, which causes the flow pressure of the liquid medicine flowing outward from the lower side of the PCB to change constantly, and the liquid medicine flows to the lower surface of the PCB in the form of a wave, thereby causing the liquid medicine on the lower side of the PCB to mix with each other through the constantly fluctuating liquid, further increasing the replacement speed of the liquid medicine around the PCB, and the fluctuating liquid is more easily introduced into the counterbore of the PCB through its flow inertia, thereby increasing the efficiency of copper deposition in the counterbore of the PCB.

[0050] When the liquid medicine flows out from the lower side of the PCB board, it passes through the gap between the upper side of the PCB board and the limiting piece 42, re-enters the liquid storage pool 5 through the first barrier plate 51. At this time, because the flow area of the through hole on the first barrier plate 51 increases from left to right in turn, the amount of liquid medicine flowing into the liquid storage pool 5 from the left side of the soaking pool 4 is less, and the amount of liquid medicine flowing into the liquid storage pool 5 from the right side of the soaking pool 4 is more. Part of the liquid medicine on the left side needs to flow to the right before it can more easily enter the liquid storage pool 5, so that the liquid medicine on both sides of the soaking pool 4 is more easily mixed together. When the power roller group 41 is started, the staff synchronously starts the bubble generator 53 and the small turbofan 56 through the control terminal, so that the liquid medicine entering the liquid storage pool 5 from the right side is accelerated to the left by the small turbofan 56, further promoting the mutual flow of the liquid medicine in the liquid storage pool 5. The staff controls the sampling detector 57 to extract part of the liquid medicine at regular intervals through the control terminal to detect the concentration of the liquid medicine in the liquid storage pool 5. When the liquid medicine in the liquid guide cavity 501 enters the mixing cavity 502 through the second barrier plate 52, it is also affected by the change of the flow area of the through hole on the mixing cavity 502, and relatively uniformly enters the mixing cavity 502. The bubble generator 53 introduces bubbles into the mixing cavity 502, and the bubbles are finally discharged outward from the gas-liquid separator 55. The staff calculates the amount of high-concentration liquid medicine that needs to be supplemented by sampling the liquid medicine, and then the staff controls the liquid supplementing nozzle 54 to spray the required liquid medicine into the mixing cavity 502 through the control terminal. The liquid medicine in the mixing cavity 502 is rapidly mixed under the action of the bubbles, and finally re-enters the power pool 6 through the liquid inlet 601.

[0051] When the power roller group 41 completely transports the PCB board to the right side of the swing roller group 15, the staff closes the right side of the swing roller group 15 through the control terminal, and controls the extension end of the right side of the electric push rod 10 to extend upward through the control terminal. The extension end of the electric push rod 10 drives the right side of the connecting piece 11, the connecting plate 12, the sliding plate 13 and the rotating plate 14 to move upward, so that the right side of the swing roller group 15 gradually rotates to the horizontal state. Then the staff restarts the right side of the swing roller group 15 through the control terminal, and the swing roller group 15 transports the PCB board to the discharge roller group 3, and the discharge roller group 3 transports the PCB board to the next process. When the PCB board completely leaves the right side of the swing roller group 15, the staff controls the extension end of the right side of the electric push rod 10 to drive the connecting piece 11, the connecting plate 12, the sliding plate 13, the rotating plate 14 and the swing roller group 15 to swing back to the original position through the control terminal.

[0052] When the production of the PCB board is stopped, the staff closes the feeding roller group 2, the discharge roller group 3, the power roller group 41, the motor 7, the swing roller group 15, the bubble generator 53 and the small turbofan 56 through the control terminal.

[0053] Embodiment 2: on the basis of embodiment 1, the function of cleaning the PCB board to be prepared to enter the soaking pool 4 by using the liquid medicine is further added.

[0054] Preferably, referring to Figure 7 , Figure 10 and Figure 11 , the removing mechanism for removing the micro-bubbles attached to the PCB board is further included, which is arranged on the left side of the box 1 and between the soaking pool 4 and the left swing supporting roller group 15, and includes the degassing pool 16, the degassing pool 16 is communicated with the soaking pool 4, the driving supporting roller group 17 is arranged on the degassing pool 16 in an inclined manner, the driving supporting roller group 17 is electrically connected with the control terminal, the degassing pool 16 is provided with an inclined surface, and the alternating distributed liquid injection ports 161 are arranged on the inclined surface of the degassing pool 16, the liquid injection ports 161 are communicated with the liquid outlet 602.

[0055] Preferably, referring to Figure 11 and Figure 12 , the auxiliary rotating wheel 18 is arranged on the degassing pool 16 in a spaced manner.

[0056] In the above scheme, the driving supporting roller group 17 is only a single row of driving rollers (the specific structure is similar to that of the power supporting roller group 41, the plane where the driving supporting roller group 17 is located is the same as the plane where the upper driving rollers of the power supporting roller group 41 are located, and the plane where the auxiliary rotating wheel 18 is located is the same as the plane where the lower driving rollers of the power supporting roller group 41 are located), the driving supporting roller group 17 is used to drive the PCB board to move on the upper side of the PCB board, so as to reduce the gap between the PCB board and the bottom surface of the soaking pool 4, increase the pressure of the liquid medicine sprayed from the liquid injection port 161 to impact the PCB board, and then clean the micro-bubbles attached to the PCB board when the PCB board is immersed in the liquid medicine, increase the efficiency of the subsequent soaking treatment, the auxiliary rotating wheel 18 is a passive roller, which is used to reduce the probability of the PCB board contacting the bottom of the degassing pool 16.

[0057] The working principle of the above scheme is as follows:

[0058] When the staff starts the power roller group 41 through the control terminal, the staff synchronously starts the transmission roller group 17, and in the process that the staff conveys the PCB board to the right through the left swing roller group 15, the PCB board enters between the transmission roller group 17 and the adjacent auxiliary rotating wheel 18, and in this process, the power pool 6 continuously conveys the liquid medicine into the liquid inlet 601, the liquid medicine in the left liquid inlet 601 gradually enters the staggered distribution liquid outlet 161, and then because the liquid medicine is sprayed out of the liquid outlet 161, only the gap between the PCB board and the bottom surface of the degassing pool 16 can spray out, so the flow pressure of the liquid medicine is larger than that in the soaking pool 4, and the micro-bubbles generated on the PCB board by soaking in the liquid medicine are easily washed away, thereby increasing the contact efficiency of the liquid medicine and the PCB board, and further increasing the soaking efficiency of the subsequent soaking step, and when the PCB board enters the lower side of the transmission roller group 17, the transmission roller group 17 continuously conveys the PCB board to the right until the PCB board is conveyed into the power roller group 41.

[0059] When the staff stops producing the PCB board, the staff synchronously closes the transmission roller group 17 by closing the power roller group 41 through the control terminal.

[0060] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. An immersion apparatus for PCB boards, characterized in that: The device includes a housing (1), with a feeding roller assembly (2) installed at one end and a discharging roller assembly (3) installed at the other end. A soaking tank (4), a storage tank (5), and a power tank (6) are interconnected in the middle of the housing (1). A power roller assembly (41) is inclinedly arranged inside the soaking tank (4) and is used to transport PCB boards. The connection between the soaking tank (4) and the storage tank (5) is located on one side of the power roller assembly (41), and the connection between the soaking tank (4) and the power tank (6) is located on the other side of the power roller assembly (41). The power tank (6) is used for extraction. The liquid storage tank (5) contains the liquid medicine and transports the liquid medicine to the soaking tank (4). The box (1) is equipped with a motor (7). The power tank (6) is rotatably connected to a rotating roller (8). The output shaft of the motor (7) penetrates the power tank (6) and is fixedly connected to the rotating roller (8). The rotating roller (8) is slidably connected to a circumferentially evenly distributed moving strip (9). A first elastic element is provided between the moving strip (9) and the rotating roller (8). The moving strip (9) is in contact with the power tank (6). The box (1) is provided with a symmetrically distributed swing mechanism. The swing mechanism is used to drive the PCB board to switch between horizontal and inclined states. The power tank (6) is provided with an inlet (601) and an outlet (602). The inlet (601) is connected to the storage tank (5). The lower part of the soaking tank (4) is provided with an arc-shaped groove (401). The outlet (602) is connected to the lower part of the arc-shaped groove (401). A limiting component (42) and a limiting baffle (43) are fixedly connected inside the soaking tank (4). The limiting baffle (43) is located on the side of the arc-shaped groove (401) near the connection between the soaking tank (4) and the storage tank (5). The limiting component (42) and the limiting baffle (43) are used together to optimize the flow path of the liquid. The soaking tank (4) is provided with a liquid guiding surface (402), which is located on the upper side of the arc groove (401). The angle between the liquid guiding surface (402) and the horizontal plane is greater than the angle between the inclined plane where the power idler roller group (41) is located and the horizontal plane. The arc-shaped groove (401) is fixed with longitudinal baffles (44) that are spaced apart. The power tank (6), the rotating roller (8), and the two adjacent moving bars (9) together form a cavity with a constantly changing volume.

2. The immersion apparatus for PCB boards according to claim 1, characterized in that: The storage tank (5) is provided with a first baffle (51) and a second baffle (52). Both the first baffle (51) and the second baffle (52) are provided with through holes spaced apart. The first baffle (51) is located at the connection between the soaking tank (4) and the storage tank (5). The second baffle (52) divides the storage tank (5) into a liquid guiding chamber (501) and a liquid mixing chamber (502) that are connected to each other. The liquid guiding chamber (501) is connected to the soaking tank (4) through the first baffle (51). The liquid mixing chamber (502) is connected to the liquid inlet (601). The liquid guiding chamber (501) is used to guide the medicine liquid entering the storage tank (5) to mix smoothly.

3. The immersion apparatus for PCB boards according to claim 2, characterized in that: The mixing chamber (502) is provided with spaced bubble generators (53), spaced liquid replenishing nozzles (54), and spaced gas-liquid separators (55). The positions of the liquid replenishing nozzles (54) and the gas-liquid separators (55) are both higher than the position where the mixing chamber (502) communicates with the liquid inlet (601).

4. The immersion apparatus for PCB boards according to claim 3, characterized in that: The liquid guiding cavity (501) is provided with a serpentine flow channel, the liquid guiding cavity (501) is provided with small turbine fans (56) distributed at intervals, and the serpentine flow channel of the liquid guiding cavity (501) is provided with sampling detectors (57) distributed at intervals.

5. An immersion apparatus for PCB boards according to claim 4, characterized in that: The swing mechanism includes an electric push rod (10), which is fixed to the outside of the housing (1). The telescopic end of the electric push rod (10) is fixed to a connector (11), and the connector (11) is fixed to a connecting plate (12). The connecting plate (12) is slidably connected to a sliding plate (13), and the sliding plate (13) is hinged to a rotating plate (14). A swing roller assembly (15) is installed on the rotating plate (14), and the swing roller assembly (15) is rotatably connected to the housing (1).

6. The immersion apparatus for PCB boards according to claim 5, characterized in that: It also includes a removal mechanism for removing microbubbles attached to the PCB board. The removal mechanism is located on the side of the housing (1) near the feed roller group (2). The removal mechanism includes a degassing tank (16). The degassing tank (16) is connected to the soaking tank (4). A transmission roller group (17) is inclinedly arranged on the degassing tank (16). The degassing tank (16) is provided with an inclined surface. Alternating spray nozzles (161) are provided on the inclined surface of the degassing tank (16). The spray nozzles (161) are connected to the liquid outlet (602).

7. An immersion apparatus for PCB boards according to claim 6, characterized in that: The degassing tank (16) is provided with auxiliary rotors (18) spaced apart.

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