Soaking device for PCB

Abstract

The invention relates to the technical field of integrated circuit manufacturing, in particular to a soaking device for a PCB. Comprising a box body, a feeding carrier roller set and a discharging carrier 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 carrier roller set is obliquely arranged in the soaking pool, a motor is installed in the box body, a rotating roller is rotationally connected in the power pool, and a motor is installed in the rotating roller. An output shaft of the motor penetrates through the power pool and is fixedly connected with the rotating roller, and the rotating roller is slidably connected with moving strips which are evenly distributed in the circumferential direction. According to the PCB soaking device, the PCB is driven to move through the power carrier roller set in the soaking pool, the liquid medicine is driven to flow through the rotating rollers and the moving strips, the liquid medicine penetrates through or bypasses the PCB to circularly flow, the problem of poor cohesion between different processes in the PCB production process is solved, and the treatment efficiency of the PCB soaking process is improved through the 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, limiting baffle and longitudinal baffle, and at the same time uses the power tank to output fluctuating liquid 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 blind hole on the PCB and improve the efficiency of copper deposition on the through hole and blind hole on the PCB.

[0016] The application sprays 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; Figure 2 It is a schematic diagram of the three-dimensional structure of the discharge roller group and the soaking tank of the application; Figure 3 It is a schematic diagram of the three-dimensional structure of the soaking tank and the liquid storage tank of the application; Figure 4 It is a sectional view of the liquid storage tank and the power tank of the application; Figure 5 It is a schematic diagram of the three-dimensional structure of the liquid storage tank of the application; Figure 6 It is a schematic diagram of the three-dimensional structure of the liquid storage tank of the application; Figure 5 It is an enlarged view of A in the application; Figure 7 It is a schematic diagram of the three-dimensional structure of the electric push rod and the connecting piece of the application; Figure 8 It is a schematic diagram of the three-dimensional structure of the swinging roller group of the application; Figure 9 It is a schematic diagram of the state of the swinging roller group of the application after swinging; Figure 10 It is a schematic diagram of the three-dimensional structure of the degassing tank and the transmission roller group of the application; Figure 11It is a three-dimensional structural schematic diagram of the gas removal tank and the liquid injection port of the application. Figure 12 It is a three-dimensional structural schematic diagram of the gas removal tank and the liquid injection port of the application. Figure 11 It is an enlarged view of B in the application.

[0018] In the above figure: 1: box body, 2: feeding roller group, 3: discharging roller group, 4: soaking tank, 41: power roller group, 42: limiting part, 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 part, 12: connecting plate, 13: sliding plate, 14: rotating plate, 15: swinging roller group, 16: gas removal tank, 161: liquid injection port, 17: transmission roller group, 18: auxiliary rotating wheel. DETAILED DESCRIPTION

[0019] 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 for thoroughness and completeness, and fully convey the scope of the application to the skilled person.

[0020] Embodiment 1: This embodiment discloses a soaking device for PCB board, 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 immersion of the existing PCB board soaking device.

[0021] With reference to Figures 1-5The utility model provides a kind of soaking device for PCB board, including box 1, the left and right ends of box 1 are equipped with feeding roller group 2 and discharge roller group 3 respectively, 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 located respectively at 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, 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 uniformly distributed movement strip 9, first elastic member is arranged between movement strip 9 and rotating roller 8, first elastic member is spring, movement 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. Figure 4

[0022] 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, power pool 6, rotating roller 8 and movement strip 9 form a structure similar to a rotary vane pump, and their working principles are the same as that of rotary vane pump.

[0023] Preferably, referring 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.

[0024] 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 surface 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.

[0025] 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 direction flow of the liquid.

[0026] 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.

[0027] Preferably, referring to Figures 3-5The first baffle plate 51 and the second baffle plate 52 are provided with through holes which are distributed at intervals, the first baffle plate 51 is located at the communication position between the soaking pool 4 and the liquid storage pool 5, and the second baffle plate 52 divides the liquid storage pool 5 into a liquid guide cavity 501 and a mixed liquid cavity 502 which are in communication with each other, the liquid guide 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 guide cavity 501 is used for guiding the stable mixing of the liquid medicine entering the liquid storage pool 5, and it is convenient for the staff to detect the concentration of the liquid medicine, the staff supplements the high-concentration liquid medicine into the mixed liquid cavity 502 according to the detection result.

[0028] 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, and the positions of the liquid supplementing nozzles 54 and the gas-liquid separators 55 are higher than the position of the communication position between the mixed liquid cavity 502 and the liquid inlet 601.

[0029] Preferably, referring to Figures 4-6 The liquid guide cavity 501 is provided with a serpentine flow channel, the liquid guide cavity 501 is provided with small vortex fans 56 which are distributed at intervals near the inlet of the serpentine flow channel, and the serpentine flow channel of the liquid guide cavity 501 is provided with sampling detectors 57 which are distributed at intervals.

[0030] In the above scheme, the serpentine flow channel of the liquid guide cavity 501 refers 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 guide cavity 501 in Figure 5 , and the last bending position of the serpentine flow channel is located at the rear side of the right part of the liquid guide 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 (taking 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 make the liquid medicine at different positions relatively balanced when entering or flowing out of the serpentine flow channel, reduce the difference between the flow amounts of the liquid medicine at the front and rear ends, improve the representativeness of the concentration sample of the detected liquid medicine in the serpentine flow channel, improve the calculation accuracy of the staff when calculating the subsequent liquid medicine supplementing, the bubble generators 53 are in communication with an 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, promote the rapid and uniform mixing of liquid medicines with different concentrations, so as to ensure that the concentration of the liquid medicine used in the soaking pool 4 is always in a relatively stable state, and further ensure that the standard of the processing process is always above the qualified standard.

[0031] Preferably, referring to Figure 2 , Figure 3 and Figures 7-9The swinging mechanism comprises an electric push rod 10, the electric push rod 10 is electrically connected with the control terminal, the electric push rod 10 is fixedly connected to the outer side of the box body 1, the telescopic end of the electric push rod 10 is fixedly connected with a connecting piece 11, the connecting piece 11 is fixedly connected with a connecting plate 12, the front side of the connecting plate 12 is slidingly connected with a sliding plate 13, the front side of the sliding plate 13 is hingedly connected with a rotating plate 14, the rotating plate 14 is provided with a swinging roller set 15, the swinging roller set 15 is electrically connected with the control terminal, and the swinging roller set 15 is rotationally connected with the box body 1.

[0032] In the above scheme, the swinging roller set 15 is an existing electric control transmission device (its specific structure is similar to that of the power roller set 41, and it is also a double-row transmission roller), and the total stroke of the swinging roller set 15 for conveying the PCB board can be adjusted according to the actual production situation. When the rear side of the swinging roller set 15 swings to the lowermost side, the inclined plane where the swinging roller set 15 is located is the same as the inclined plane where the power roller set 41 is located. When the rear side of the swinging roller set 15 swings to the uppermost side, the horizontal plane where the swinging roller set 15 is located is the same as the horizontal plane where the feeding roller set 2 and the discharging roller set 3 are located. Referring to Figure 1 The initial non-working state of the left swinging roller set 15 is a horizontal state, and the initial non-working state of the right swinging roller set 15 is an inclined state.

[0033] The working principle of the above scheme is as follows: The worker first places the PCB board on the feeding roller set 2 (or conveys it to the feeding roller set 2 from the conveying roller set in other production steps), and then synchronously starts the feeding roller set 2, the discharging roller set 3, the power roller set 41, the motor 7 and the two swinging roller sets 15 through the control terminal. The feeding roller set 2 conveys the PCB board to the left swinging roller set 15 on the right. When the PCB board is completely moved to the swinging roller set 15, the control terminal closes the left swinging roller set 15, and controls the telescopic end of the left electric push rod 10 to shrink downward. 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 downward together. The sliding plate 13 slides forward relative to the connecting plate 12, and the sliding plate 13 and the rotating plate 14 rotate relative to each other. At this time, the left swinging roller set 15 gradually swings downward until the swinging roller set 15 swings to the lowermost side of its stroke (i.e., the inclined plane where the swinging roller set 15 is located is the same as the inclined plane where the power roller set 41 is located). The control terminal closes the electric push rod 10 and starts the left swinging roller set 15. The swinging roller set 15 continues to convey the PCB board to the right, until the PCB board leaves the swinging roller set 15 and enters the power roller set 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.

[0034] In the above process, if it is required that the swing roller group 15 is always 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 board does not move above the power roller group 41 before the swing roller group 15 stops swinging.

[0035] When the PCB board enters the power roller group 41, the power roller group 41 continues to convey the PCB board to the right. Because the PCB board is always in an inclined state, the PCB board gradually moves downward to a 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 thereon 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 volume that changes continuously (the power pool 6, the rotating roller 8, and the moving strip 9 can be regarded as an existing rotary vane pump, and their 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.

[0036] After the liquid medicine enters the arc-shaped groove 401, taking the position of the PCB board as an example, the liquid medicine is just below the PCB board, and because the gap between the limiting baffle 43 and the PCB board is small (or the two are in direct contact), the liquid medicine is blocked from flowing directly to the right. 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 board and the adjacent longitudinal baffle 44, through the through hole on the PCB board, and through the gap between the PCB board 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 board and indirectly increasing the flow rate of the liquid medicine flowing outward from the lower side of the PCB board.

[0037] During the above process of the liquid medicine entering the soaking pool 4 from the power pool 6, because the volume of the cavity formed by 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 board to change constantly, and the liquid medicine flows to the lower surface of the PCB board in the form of a wave, thereby causing the liquid medicine on the lower side of the PCB board to mix with each other through the constantly fluctuating liquid, further increasing the replacement speed of the liquid medicine around the PCB board. At the same time, the fluctuating liquid is more likely to enter the counterbore of the PCB board through its flow inertia, thereby increasing the efficiency of copper deposition in the counterbore of the PCB board.

[0038] When the liquid medicine flows out of 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.

[0039] 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.

[0040] 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.

[0041] Embodiment 2: on the basis of embodiment 1, it is further added that the PCB board to be prepared to enter the soaking pool 4 is cleaned by using the liquid medicine.

[0042] Preferably, referring to Figure 7 , Figure 10 and Figure 11 , a cleaning 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 swinging roller group 15, and includes a degassing pool 16 in communication with the soaking pool 4, a transmission roller group 17 arranged on the degassing pool 16 in an inclined manner, the transmission roller group 17 being electrically connected with the control terminal, and the degassing pool 16 being provided with an inclined surface and a plurality of liquid spraying ports 161 arranged on the inclined surface in an alternating manner, the liquid spraying ports 161 being in communication with the liquid outlet 602.

[0043] Preferably, referring to Figure 11 and Figure 12 , the degassing pool 16 is provided with a plurality of auxiliary rotating wheels 18 arranged in an interval manner.

[0044] In the above scheme, the transmission roller group 17 is only a single row of transmission rollers (the specific structure is similar to that of the power roller group 41, the plane where the transmission roller group 17 is located is the same as the plane where the upper transmission rollers of the power 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 transmission rollers of the power roller group 41 are located), which is used to drive the PCB board on the upper side to move, thereby reducing the gap between the PCB board and the bottom surface of the soaking pool 4, increasing the pressure of the liquid medicine sprayed from the liquid spraying port 161 to impact the PCB board, and thereby cleaning the micro-bubbles attached to the PCB board when it is immersed in the liquid medicine, and increasing the efficiency of the subsequent soaking process. 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.

[0045] The working principle of the above scheme is as follows: When the staff starts the power roller group 41 through the control terminal, the transmission roller group 17 is started synchronously. During the process that the staff transports the PCB board to the right through the left swinging roller group 15, the PCB board enters between the transmission roller group 17 and the adjacent auxiliary rotating wheel 18. In this process, the power pool 6 continuously transports the liquid medicine into the liquid inlet 601, and the liquid medicine in the left liquid inlet 601 gradually enters the staggered liquid spraying ports 161. Subsequently, because the liquid medicine is sprayed out of the liquid spraying port 161, it can only be sprayed out of the gap between the PCB board and the bottom surface of the degassing pool 16, so the flow pressure of the liquid medicine is greater than that of the liquid medicine in the soaking pool 4, which is easy to flush away the micro-bubbles generated on the PCB board when it is immersed in the liquid medicine, thereby increasing the contact efficiency of the liquid medicine and the PCB board, and further increasing the soaking efficiency of the subsequent soaking step. When the PCB board enters the lower side of the transmission roller group 17, the transmission roller group 17 continuously transports the PCB board to the right until the PCB board is transported into the power roller group 41.

[0046] When the worker stops producing the PCB board, the worker closes the driving roller set 41 synchronously with the driving roller set 17 through the control terminal.

[0047] Finally, it should be noted that the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A soak apparatus for PCB boards, characterized by: The utility model provides a kind of PCB soaking device, including box (1), the both ends of the box (1) are respectively equipped with feeding roller group (2) and discharging roller group (3), the middle part of the box (1) is equipped with mutually communicating soaking pool (4), liquid storage pool (5) and power pool (6), the power roller group (41) is arranged in the soaking pool (4) and is inclined, the power roller group (41) is used to transmit PCB board, the communication place of the soaking pool (4) and the liquid storage pool (5) and the communication place of the soaking pool (4) and the power pool (6) are respectively located on the both sides of the power roller group (41), the power pool (6) is used to extract liquid medicine in the liquid storage pool (5), and liquid medicine is delivered to the soaking pool (4) inside, motor (7) is installed in the box (1), rotating roller (8) is rotatably connected in the power pool (6), the output shaft of the motor (7) penetrates the power pool (6) and is fixedly connected with the rotating roller (8), the rotating roller (8) is slidably connected with the circumferentially uniformly distributed moving strip (9), first elastic member is arranged between the moving strip (9) and the rotating roller (8), the moving strip (9) is in contact with the power pool (6), the box (1) is provided with symmetrically distributed swing mechanism, and the swing mechanism is used to drive PCB board to switch between horizontal and inclined state.

2. A soak apparatus for PCBs as defined in claim 1, characterized in that: The power pool (6) is provided with a liquid inlet (601) and a liquid outlet (602), 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 soaking pool (4) is fixedly connected with a limiting piece (42) and a limiting baffle (43), the limiting baffle (43) is located on the side of the arc-shaped groove (401) close to the communication place of the soaking pool (4) and the liquid storage pool (5), the limiting piece (42) and the limiting baffle (43) are used for optimizing the liquid flow path.

3. A soak apparatus for PCBs as defined in claim 2, characterized in that: The soaking pool (4) is provided with a liquid guide surface (402), the liquid guide surface (402) is located on the upper side of the arc-shaped groove (401), and 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.

4. A soak apparatus for PCBs as defined in claim 3, characterized in that: The arc-shaped groove (401) is fixedly connected with longitudinally distributed spacing baffles (44).

5. A soak apparatus for PCB boards as claimed in claim 3, wherein: The liquid storage pool (5) is provided with a first baffle (51) and a second baffle (52), the first baffle (51) and the second baffle (52) are both provided with spaced-apart through holes, the first baffle (51) is located at the communication place of the soaking pool (4) and the liquid storage pool (5), the second baffle (52) divides the liquid storage pool (5) into a liquid guide cavity (501) and a mixed liquid cavity (502) which are communicated with each other, the liquid guide cavity (501) is communicated with the soaking pool (4) through the first baffle (51), the mixed liquid cavity (502) is communicated with the liquid inlet (601), and the liquid guide cavity (501) is used for guiding the liquid medicine entering the liquid storage pool (5) to mix stably.

6. A soak apparatus for PCBs as defined in claim 5, characterized in that: The mixed liquid chamber (502) is provided with bubble generators (53) distributed at intervals, liquid supplementing nozzles (54) distributed at intervals and gas-liquid separators (55) distributed at intervals, and the liquid supplementing nozzles (54) and the gas-liquid separators (55) are located higher than the position where the mixed liquid chamber (502) communicates with the liquid inlet (601).

7. A soak apparatus for PCB boards as defined in claim 5, characterized in that: The liquid guiding chamber (501) is provided with a serpentine flow channel, and the liquid guiding chamber (501) is provided with small vortex fans (56) distributed at intervals, and the serpentine flow channel of the liquid guiding chamber (501) is provided with sampling detectors (57) distributed at intervals.

8. A soak apparatus for PCB boards as defined in claim 2, characterized by: The swinging mechanism comprises an electric push rod (10) fixed to the outside of the box (1), a connecting piece (11) fixed to the telescopic end of the electric push rod (10), a connecting plate (12) fixed to the connecting piece (11), a sliding plate (13) slidingly connected to the connecting plate (12), a rotating plate (14) hingedly connected to the sliding plate (13), and a swinging roller set (15) installed on the rotating plate (14) and rotationally connected to the box (1).

9. The soak apparatus for PCB boards as claimed in claim 5, wherein: The cleaning mechanism for removing micro-bubbles attached to the PCB is arranged on the side of the box (1) close to the feeding roller set (2), and comprises a degassing tank (16) communicating with the soaking tank (4), a transmission roller set (17) arranged obliquely on the degassing tank (16), and an inclined surface provided on the degassing tank (16), and the degassing tank (16) is provided with liquid injection ports (161) alternately distributed on the inclined surface and communicating with the liquid outlet (602).

10. A soak apparatus for PCB boards as defined in claim 9, characterized by: The degassing tank (16) is provided with auxiliary rotating wheels (18) distributed at intervals.

Images