PCB etching liquid cleaning module

Abstract

The invention relates to the technical field of PCB (Printed Circuit Board) cleaning, in particular to a PCB etching liquid cleaning module, which comprises a frame, an etching liquid cleaning module, a cleaning module and a control module, and is characterized in that protruding connecting lugs are arranged on the peripheral edge of the frame and are used for being connected with an execution station; the lower side plates are connected to the two sides of the lower portion of the frame, and the lower side plates arranged on the two sides and the frame form a water storage container; the lower transmission roller frames are uniformly and rotatably arranged at the lower part of the frame at intervals, belt pulleys connected with driving parts are arranged at two ends of the lower transmission roller frames, and the roller top end of the lower transmission roller is higher than the top end of the lower side plate; the top cover plate is arranged at the top of the frame; the water pipe racks are arranged on the top cover plate and the bottom of the frame in pairs, and the water pipe racks penetrate into the frame; and an atomizing nozzle and a flat nozzle are respectively arranged at the end part of each group of water pipe frame. When the lower transmission roller frame is used for conveying, etching liquid on the plate surface is atomized and diluted through the atomizing nozzles, and then the flat nozzle is used for spraying and cleaning the plate surface, so that the residual etching liquid is prevented from continuously corroding the plate material.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board cleaning, and in particular to a PCB board etching liquid cleaning module. Background Art

[0002] PCB etching is to remove the unnecessary copper conductors from the surface of the copper-clad board through chemical etching, leaving the copper conductors to form a circuit pattern, so as to obtain the desired circuit pattern. Before etching, it is necessary to apply a lead-tin anti-corrosion layer on the circuit pattern on the board surface to protect the required circuit pattern from corrosion. After etching is completed, the lead-tin layer on the board surface is cleaned through the tin stripping process. Before tin stripping, if the etching liquid remaining on the board surface is not cleaned up, it is easy to continue to corrode the circuit pattern, resulting in gaps and fractures in the circuit, resulting in a decrease in the quality of the circuit pattern on the board surface. Therefore, before tin stripping, the board needs to be cleaned to remove excess etching liquid on the board surface. Summary of the invention

[0003] The present invention aims to solve the problem in the prior art that when a PCB board is subjected to a tin stripping process, residual etching liquid will continue to corrode circuit patterns, causing circuit quality to deteriorate. To this end, the present invention provides a PCB board etching liquid cleaning module.

[0004] To achieve the above-mentioned purpose, the present invention provides such a PCB etching liquid cleaning module, comprising: a frame, the edges of which are provided with protruding connecting ears for connecting with an execution station; a lower side plate connected to both sides of the lower part of the frame, the lower side plates arranged on both sides and the frame forming a water storage container; a lower transmission roller frame, which is evenly rotated and arranged at the lower part of the frame, and the two ends of the lower transmission roller frame are provided with pulleys connected to a driving member, and the height of the roller top of the lower transmission roller frame exceeds the height of the top of the lower side plate; a top cover plate, which is arranged at the top of the frame; water pipe racks, which are arranged in groups of two, and one group is respectively provided on the top cover plate and the bottom of the frame, and the water pipe rack penetrates into the frame; an atomizing nozzle and a flat nozzle are respectively provided at the end of each group of the water pipe racks, and the atomizing nozzle and the flat nozzle are placed between the gaps of the lower transmission roller frame, and the atomizing nozzle and the flat nozzle are inclined forty-five degrees toward the direction in which the flat nozzle approaches the atomizing nozzle; a drain outlet is arranged at the bottom of the frame.

[0005] As a further improvement of the solution, it also includes: an upper transmission roller frame, which is rotatably arranged on the upper part of the frame in accordance with the number of the lower transmission roller frames, and a gap is left between the upper transmission roller frame and the lower transmission roller frame to allow the sheet material to pass through.

[0006] As a further improvement of the scheme, it also includes: an upper plate, which is arranged on the upper part of the frame on the same side as the lower plate, and a gap is left between the lower plate and the upper plate, and the gap is larger than the gap between the upper transmission roller frame and the lower transmission roller frame.

[0007] As a further improvement of the solution, it also includes: sliding holes, which are opened on both sides of the frame to allow the upper transmission roller frame to slide up / down.

[0008] As a further improvement of the solution, it also includes: an elastic retaining structure, which is installed at a position matching the sliding hole and contacts the upper transmission roller frame, keeps the upper transmission roller frame centered in the sliding hole and performs up / down undulating sliding.

[0009] As a further improvement of the scheme, it also includes: an injection rack, which is clamped on the water pipe rack with the flat nozzle through a clamp arranged thereon, and the injection rack and the flat nozzle maintain the same inclination angle; an air supply pipe, which is connected to the injection rack.

[0010] As a further improvement of the scheme, it also includes: a liquid collecting frame, connected to the drain outlet opened at the bottom of the frame; a conduit, connected to the bottom of the liquid collecting frame; a connecting frame, detachably mounted on the bottom of the liquid collecting frame through a guide plate; an installation frame, installed at the bottom of the connecting frame; a pump, installed in the installation frame, the water suction port of the pump is connected to the conduit; the consumable liquid of the water pipe rack is transported back to the water pipe rack by the pump through the liquid flowing out of the drain outlet.

[0011] As a further improvement of the solution, one side of the bottom of the liquid collecting frame connected to the conduit is tilted downward.

[0012] As a further improvement of the scheme, it also includes: a pH value detection module, which is added between the conduit and the pump, and the liquid enters the pH value detection module through the conduit and then enters the pump; a three-way solenoid valve, whose inlet is connected to the water outlet of the pump; the pH value detection module controls the three-way solenoid valve by judging the pH value of the liquid to make the liquid flow out from one of the first outlet and the second outlet, the first outlet serves as a reflux liquid supply port to supply the liquid into the water pipe rack, and the second outlet serves as a waste liquid discharge port.

[0013] As a further improvement of the scheme, the elastic retaining structure includes: a limit frame, which is installed on the frame to match the position of the sliding hole; a slider, which is slidably arranged in the limit frame, and the end of the upper transmission roller frame passes through the slider; a guide rod, which passes through the slider and the end of the upper transmission roller frame; a spring, which is mounted on the upper and lower sides of the guide rod to keep the slider in the middle position of the limit frame; and a cover plate, which is fixed on the limit frame to cover the slider.

[0014] The present invention brings at least the following effects: 1. The present invention directly installs the frame on the etching production line. When the sheet material coming out after etching is transmitted through the lower transmission roller frame, the etching liquid on the sheet surface is first atomized and diluted by the atomizing nozzle, and then the sheet surface is sprayed and cleaned by the flat nozzle. With the transmission of the lower transmission roller frame, the etching liquid on the sheet material can be cleaned to avoid the residual etching liquid from continuously corroding the sheet material. The cleaned sheet material can directly enter the tin stripping link for tin stripping operation.

[0015] 2. The upper transmission roller frame provided in the present invention can press the sheet material when the sheet material is conveyed and cleaned, so as to prevent the sheet material from moving backward when it is affected by the water flow sprayed obliquely from the flat nozzle.

[0016] 3. The sliding hole and the elastic retaining structure provided in the present invention enable the upper transmission roller frame to apply a certain pressure while pressing the sheet material, so as to better clamp the sheet material between the two transmission roller frames for transmission.

[0017] 4. The liquid collecting frame and pump provided in the present invention can return the water used for cleaning to the water pipe rack for secondary utilization, so as to reduce the waste of water resources; at the same time, the pH value detection module is used to detect the pH value of the recovered water, and the recovered water that meets the requirements is sent to the water pipe rack through the control of the three-way solenoid valve, and the water is discharged through the other outlet of the three-way solenoid valve when it does not meet the requirements after multiple cleanings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a complete schematic diagram of the present invention.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the disassembly.

[0020] Figure 3 For the present invention Figure 2 Side view with the frame removed.

[0021] Figure 4 It is a schematic diagram of the water pipe rack, atomizing nozzle and flat nozzle of the present invention.

[0022] Figure 5 It is a schematic diagram of the clamp, the jet frame and the air supply pipe of the present invention.

[0023] Figure 6 It is a schematic diagram of the liquid collecting frame, the conduit, the connecting frame and the placement frame of the present invention.

[0024] Figure 7 It is a schematic diagram of the interior of the placement frame of the present invention after being cut away.

[0025] Figure 8 It is a schematic diagram of the limit frame and the slider of the present invention.

[0026] Fig. 9 It is a schematic diagram of the limit frame, the sliding block, the guide rod, the spring and the cover plate of the present invention.

[0027] The corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is as follows: 1-frame, 100-connecting ear, 101-drain port, 2-lower side plate, 21-upper side plate; 3-lower transmission roller frame, 31-pulley, 32-upper transmission roller frame, 33-sliding hole; 4-top cover plate, 5-water pipe rack, 51-atomizing nozzle, 52-flat nozzle, 53-water supply connector; 6-clamp, 61-jet frame, 62-air supply pipe; 71-liquid collecting frame, 72-conduit, 73-connecting frame, 74-guide plate, 75-placement frame, 76-pump; 8-pH value detection module, 81-three-way solenoid valve, 82-first outlet, 83-second outlet; 9-limiting frame, 91-sliding block, 92-guide rod, 93-spring, 94-covering plate; 00-sheet. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The present invention specifically provides a PCB board etching liquid cleaning module, as shown in FIG1- Fig. 9As shown, it includes: a frame 1 with protruding connecting ears 100 on the edges of the upper part. When in use, the frame 1 is fixedly installed on the production line workstation through the connecting ears 100, so that the etched sheet 00 can directly enter the frame 1, and lower side plates 2 are fixedly installed on both sides of the frame 1. The lower side plates 2 arranged on both sides and the frame 1 form a water storage container, and lower transmission roller frames 3 are evenly rotated at intervals in the lower part of the frame 1, and pulleys 31 connected to the driving member are provided at both ends of the lower transmission roller frames 3. When in use, the pulley 31 is driven to rotate by the output device on the production line and then drives the lower transmission roller frame 3 to rotate, wherein the height of the roller top of the lower transmission roller frame 3 exceeds the height of the top of the lower side plate 2, so that the sheet 00 will not be resisted by the lower side plate 2 when it comes out of the etching production line and falls on the lower transmission roller frame 3, and the sheet 00 is translated and transported in the frame 1 through the rotation of the lower transmission roller frame 3, enters from one side of the frame 1, and is sent out from the other side of the frame 1.

[0031] according to Figure 2 and Figure 3 As shown, a top cover plate 4 is fixedly installed on the top of the frame 1, and water pipe racks 5 are arranged in groups of two, with one group being provided on the top cover plate 4 and one group being provided on the bottom of the frame 1 respectively. The water pipe racks 5 are provided with a plurality of branch pipes, which penetrate into the interior of the frame 1. The ends of the branch pipes of the two water pipe racks 5 in each group are provided with a mist nozzle 51 and a flat-mouth nozzle 52 respectively. The water pipe racks 5 are connected to an external water source through a water supply connector 53, and the water is pressurized and then sprayed out through the mist nozzle 51 and the flat-mouth nozzle 52. The atomizing nozzle 51 and the flat-mouth nozzle 52 are placed between the gaps of the lower driving roller frame 3 to spray water onto the surface of the sheet 00. The arrangement angles of the flat-mouth nozzles 52 are consistent, so that the curtain-like water flow sprayed by the flat-mouth nozzles 52 can just cover the width of the sheet 00, and the atomizing nozzle 51 and the flat-mouth nozzle 52 are arranged at an angle, and the inclination angle is forty-five degrees in the direction in which the flat-mouth nozzle 52 approaches the atomizing nozzle 51. The advantage of the inclined arrangement is that the sprayed water flow will only flow to one side and will not disperse to both sides. A drain port 101 is provided at the bottom of the frame 1, and the water used to clean the sheet 00 falls on the bottom of the frame 1 and is discharged through the drain port 101. Specifically, according to Figure 3 As shown, the sheet 00 enters the frame 1 from the right side and falls on the lower transmission roller frame 3. The sheet 00 moves to the left with the rotation of the lower transmission roller frame 3. During the movement, it will first encounter the atomizing nozzles 51 arranged on the upper and lower sides. The atomizing nozzles 51 spray mist to adhere to the surfaces of both sides of the sheet 00, thereby diluting the etching liquid remaining on the board surface. As the sheet 00 continues to move through the flat nozzle 52, the flat nozzle 52 sprays a curtain of water to clean the surface of the sheet 00, and cleans the residual etching liquid after dilution. The cleaned sheet 00 is sent out from the other side of the frame 1, thereby completing the cleaning of the sheet 00, and then it can directly enter the tin removal link through the frame 1, thereby realizing production continuity.

[0032] according to Figure 2 and Figure 3 As shown, a jet rack 61 is clamped on the water pipe rack 5 with a flat nozzle 52 through a clamp 6, and the jet rack 61 and the flat nozzle 52 maintain the same inclination angle, and the jet rack 61 supplies air through an external air supply pipe 62. After the sheet material 00 is sprayed and cleaned by the flat nozzle 52, a lot of water stains will remain on the surface. After the spraying is completed, the surface of the sheet material 00 is sprayed by the jet rack 61, and a large amount of water stains attached to the sheet surface are blown away by surface jetting.

[0033] according to Figure 2 and Figure 3 As shown, an upper transmission roller frame 32 is provided in the upper inner part of the frame 1 in accordance with the number of the lower transmission roller frames 3, and a gap is left between the upper transmission roller frame 32 and the lower transmission roller frame 3 to allow the sheet material 00 to pass through. The sheet material 00 enters the gap between the upper transmission roller frame 32 and the lower transmission roller frame 3 and is clamped and transmitted, so that during the transmission of the sheet material 00, it will not go backward on the lower transmission roller frame 3 due to the thrust of the fluid sprayed obliquely by the jet frame 61 and the flat nozzle 52. A sliding hole 33 is provided at the rotation connection between the upper transmission roller frame 32 and the frame 1, and the upper transmission roller frame 32 is located in the sliding hole 33 for the upper transmission roller frame 32 to slide up / down. The upper transmission roller frame 32 is pressed on the sheet material 00 by its own weight, and in response to sheets 00 of different thicknesses, the upper transmission roller frame 32 can adaptively change its height.

[0034] according to Figure 2 and Figure 3 As shown, an upper side plate 21 is fixedly installed on the upper part of the frame 1 on the same side as the lower side plate 2, and a gap is left between the lower side plate 2 and the upper side plate 21. The gap between the side plate and the upper side plate 21 is larger than the gap between the upper transmission roller frame 32 and the lower transmission roller frame 3. The sheet material 00 enters the frame 1 through the gap, and during the spray washing process of the sheet material 00, the generated water vapor will not float out of the frame 1. All cleaning work is completed inside the frame 1 to prevent water vapor from floating out and entering other production lines.

[0035] according to Figure 2 As shown, an elastic retaining structure is provided at a position matching the sliding hole 33, and the elastic retaining structure contacts the upper transmission roller frame 32. The elastic retaining structure can keep the upper transmission roller frame 32 centered in the sliding hole 33 and perform up / down undulating sliding. The elastic retaining structure can make the upper transmission roller frame 32 no longer rely on its own weight to press on the plate surface, but press on the plate material 00 with a certain pressure, and can press the plate material 00 without damaging the surface of the plate material 00.

[0036] according to Figure 6 and Figure 7As shown, a liquid collecting frame 71 is fixedly installed at the drain port 101 opened at the bottom of the frame 1, and the washing water discharged from the drain port 101 falls into the liquid collecting frame 71. The bottom of the liquid collecting frame 71 is connected to a conduit 72. The side of the bottom of the liquid collecting frame 71 connected to the conduit 72 is tilted downward. The liquid collecting frame 71 with an inclined bottom can make the internal washing water better gather in one place, so as to be discharged from the conduit 72. A guide plate 74 is fixedly installed at the bottom of the liquid collecting frame 71, and a connecting frame 73 is slidably installed on the guide plate 74 and is detachably installed by bolts. A placement frame 75 is fixedly connected to the bottom of the connecting frame 73, and a pump 76 is fixedly installed in the placement frame 75. The water suction port of the pump 76 is connected to the conduit 72. The washing water entering the liquid collecting frame 71 from the drain port 101 is pumped out by the pump 76, and the pumped water is refluxed and transported again to provide the water required by the water pipe rack 5. In this way, the circulating water for washing is realized, thereby saving water.

[0037] according to Figure 6 and Figure 7 As shown, a pH value detection module 8 is further provided between the conduit 72 and the pump 76. The cleaning water flowing out of the liquid collecting frame 71 needs to enter the pH value detection module 8 from the conduit 72 and then enter the pump 76. There are two treatment methods for the cleaning water after being detected by the pH value detection module 8. One is that the pH value is unqualified and continued use will cause corrosion to the sheet material 00, so it is discharged as waste water and no longer used; the other is that the pH value is qualified and it can continue to be refluxed and used; therefore, the water outlet of the pump 76 is connected to the inlet of the three-way solenoid valve 81, and by judging the pH value of the discharged cleaning water, the three-way solenoid valve 81 is controlled accordingly to make the liquid flow out from one of the first outlet 82 and the second outlet 83. The recovered cleaning water with a qualified pH value will be discharged from the first outlet 82 as the reflux liquid supply port and supplied to the water required by the water pipe rack 5 for continued use, while the recovered cleaning water with an unqualified pH value will be discharged from the second outlet 83 as the waste liquid discharge port. Under the premise of saving water, it is ensured that repeated use of water will not damage the sheet material 00, so that the cleaning water can play its maximum value.

[0038] according to Figure 8 and Fig. 9As shown, the elastic retaining structure includes: a limit frame 9 installed on the frame 1 to match the position of the sliding hole 33, a slider 91 is slidably installed in the limit frame 9, the end of the upper transmission roller frame 32 passes through the slider 91, so that the upper transmission roller frame 32 can slide with the slider 91, the guide rod 92 passes through the slider 91 and the end of the upper transmission roller frame 32, and springs 93 are sleeved on the upper and lower sides of the guide rod 92. The springs 93 on the upper and lower sides keep the slider 91 in the middle position of the limit frame 9, so that the upper transmission roller frame 32 can return to its original position after maintaining the upward / downward sliding; a cover plate 94 is fixed on the limit frame 9 to cover the slider 91, and the sliding hole 33 can be covered by the cover plate 94 to prevent water stains from flowing out of the hole and prevent external foreign matter from being stuck between the slider 91 and the limit frame 9.

[0039] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A PCB etching liquid cleaning module, comprising: A frame (1) having protruding connection ears (100) on its four edges for connecting to an execution station; a lower side plate (2) connected to both sides of the lower part of the frame (1), the lower side plates (2) arranged on both sides and the frame (1) forming a water storage container; a lower transmission roller frame (3) rotatably arranged at intervals and uniformly arranged at the lower part of the frame (1), the two ends of the lower transmission roller frame (3) being provided with pulleys (31) connected to a driving member, the top height of the roller of the lower transmission roller frame (3) exceeding the top height of the lower side plate (2); a top cover plate (4) arranged on the top of the frame (1); characterized in that it also includes: The water pipe racks (5) are arranged in groups of two, one group being provided on the top cover plate (4) and one group being provided at the bottom of the frame (1), and the water pipe racks (5) are inserted into the interior of the frame (1); an atomizing nozzle (51) and a flat nozzle (52) are provided at the end of each group of the water pipe racks (5), the atomizing nozzle (51) and the flat nozzle (52) being arranged between the gaps of the lower transmission roller frame (3), and the atomizing nozzle (51) and the flat nozzle (52) being inclined at forty-five degrees in the direction in which the flat nozzle (52) approaches the atomizing nozzle (51); and a drainage port (101) being provided at the bottom of the frame (1).

2. The PCB etching liquid cleaning module according to claim 1, characterized in that: Also includes: An upper transmission roller frame (32) is rotatably arranged on the upper part of the frame (1) in accordance with the number of the lower transmission roller frames (3), and a gap is left between the upper transmission roller frame (32) and the lower transmission roller frame (3) to allow the sheet material (00) to pass through.

3. The PCB etching liquid cleaning module according to claim 2, characterized in that: Also includes: An upper side plate (21) is arranged on the upper part of the frame (1) on the same side as the lower side plate (2), and a gap is left between the lower side plate (2) and the upper side plate (21), and the gap is larger than the gap between the upper transmission roller frame (32) and the lower transmission roller frame (3).

4. The PCB etching liquid cleaning module according to claim 3, characterized in that: Also includes: Sliding holes (33) are provided on both sides of the frame (1) to allow the upper transmission roller frame (32) to slide up / down.

5. The PCB etching liquid cleaning module according to claim 4, characterized in that: Also includes: An elastic retaining structure is arranged at a position matching the sliding hole (33) and in contact with the upper transmission roller frame (32), so as to keep the upper transmission roller frame (32) centered in the sliding hole (33) and perform up / down undulating sliding.

6. The PCB etching liquid cleaning module according to claim 5, characterized in that: Also includes: The jet rack (61) is clamped on the water pipe rack (5) with the flat nozzle (52) through a clamp (6) provided thereon, and the jet rack (61) and the flat nozzle (52) maintain the same inclination angle; the air supply pipe (62) is connected to the jet rack (61).

7. The PCB etching liquid cleaning module according to claim 6, characterized in that: Also includes: A liquid collecting frame (71) is connected to a drain port (101) provided at the bottom of the frame (1); a conduit (72) is connected to the bottom of the liquid collecting frame (71); a connecting frame (73) is detachably mounted on the bottom of the liquid collecting frame (71) via a guide plate (74); a placement frame (75) is mounted on the bottom of the connecting frame (73); a pump (76) is mounted in the placement frame (75), and a water suction port of the pump (76) is connected to the conduit (72); and the consumed liquid of the water pipe rack (5) is transported back to the water pipe rack (5) by the pump (76) to discharge the liquid flowing out of the drain port (101).

8. The PCB etching liquid cleaning module according to claim 7, characterized in that: The bottom of the liquid collecting frame (71) is connected to one side of the conduit (72) and is tilted downward.

9. The PCB etching liquid cleaning module according to claim 8, characterized in that: Also includes: A pH value detection module (8) is additionally arranged between the conduit (72) and the pump (76); liquid enters the pH value detection module (8) through the conduit (72) and then enters the pump (76); a three-way solenoid valve (81) has an inlet connected to a water outlet of the pump (76); the pH value detection module (8) controls the three-way solenoid valve (81) by judging the pH value of the liquid, so that the liquid flows out from one of a first outlet (82) and a second outlet (83); the first outlet (82) serves as a reflux liquid supply port to supply the liquid into the water pipe rack (5); and the second outlet (83) serves as a waste liquid discharge port.

10. The PCB etching liquid cleaning module according to claim 9, characterized in that: The elastic retaining structure comprises: a limit frame (9) mounted on the frame (1) in a position matching the sliding hole (33); a slider (91) slidably arranged in the limit frame (9), and the end of the upper transmission roller frame (32) passes through the slider (91); a guide rod (92) passing through the slider (91) and the end of the upper transmission roller frame (32); a spring (93) sleeved on the upper and lower sides of the guide rod (92) to keep the slider (91) in the middle position of the limit frame (9); and a cover plate (94) fixedly arranged on the limit frame (9) to cover the slider (91).

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