Circuit board neutralizing and washing equipment

Abstract

The utility model provides a neutralizing and washing device for a circuit board, which comprises a neutralizing mechanism, a washing mechanism and a conveying line, the neutralizing mechanism comprises a water disc and a neutralizing liquid tank, the neutralizing liquid tank receives overflow liquid of the water disc, a first filter pump is also arranged in the neutralizing liquid tank, a plurality of first spraying components are arranged in the water disc, the water disc is provided with an overflow opening, and the overflow opening is communicated with the washing mechanism. The conveying line and the spraying end of the first spraying component are both located below the horizontal line of the overflow opening. The washing mechanism comprises at least two cleaning tanks which are sequentially arranged in the conveying direction, and between every two adjacent cleaning tanks, the output end of the latter cleaning tank communicates with the input end of the former cleaning tank in the conveying direction, and the output end of the latter cleaning tank is higher than the input end of the former cleaning tank; the last cleaning tank in the conveying direction is provided with a liquid inlet end, and the first cleaning tank is provided with a liquid outlet end; and a second filter pump and a plurality of second spraying components are arranged in the cleaning tank. The equipment can be used for neutralizing by combining spraying and soaking and cleaning the circuit board by connecting multiple grooves in series.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing, and in particular to a circuit board neutralization and washing equipment. Background Technology

[0002] During the circuit board manufacturing process, a large amount of adhesive residue remains inside the holes after drilling. The general method for treating this residue involves first using an expanding agent to swell and soften the residue, followed by etching the expanded hole walls with a strong oxidizing alkaline potassium permanganate solution to remove the residue. At this point, a large amount of alkaline solution remains on the circuit board surface, requiring neutralization with a strong acidic reducing agent. Finally, the circuit board is washed with water.

[0003] Traditional neutralization and washing equipment uses only a single treatment tank for spraying to neutralize and clean circuit boards, resulting in unsatisfactory neutralization and cleaning effects. Utility Model Content

[0004] The purpose of this invention is to provide a circuit board neutralization and washing device that combines spraying and soaking for neutralization and multi-tank series cleaning.

[0005] This utility model provides a circuit board neutralization and washing device, including a neutralization mechanism, a washing mechanism, and a conveyor line that passes sequentially through the neutralization mechanism and the washing mechanism along the circuit board conveying direction. The neutralization mechanism includes a water pan and a neutralization liquid tank, the neutralization liquid tank receiving overflow liquid from the water pan, the conveyor line passing through the water pan, a first filter pump being installed in the neutralization liquid tank, and multiple first spray components being installed in the water pan, distributed on the upper and lower sides of the conveying surface of the conveyor line. The first filter pump is used to extract liquid from the neutralization liquid tank and supply water for the spraying of the first spray components. The water pan has an overflow opening, and the portion of the conveyor line passing through the water pan and the spraying ends of the first spray components are all located below the horizontal line of the overflow opening. The washing mechanism includes at least two washing tanks arranged sequentially along the conveying direction, the conveyor line passing sequentially through the multiple washing tanks; between two adjacent washing tanks, along the conveying direction, the output end of the latter washing tank is connected to the input end of the former washing tank; between two adjacent washing tanks, Along the transmission direction, the output end of the subsequent cleaning tank is higher than the input end of the previous cleaning tank; the water washing mechanism includes an inlet end and an outlet end, the inlet end is located in the last cleaning tank in the transmission direction, and the outlet end is located in the first cleaning tank in the transmission direction; a second filter pump and multiple second spray components are installed in the cleaning tank, and the multiple second spray components are distributed on the upper and lower sides of the transmission surface. The second filter pump is used to extract the liquid in the cleaning tank and supply water for the spray of the second spray components.

[0006] As can be seen from the above scheme, the neutralization mechanism in this scheme combines water tray immersion with spraying from the first spray component to neutralize the circuit board surface. The sprayed neutralizing liquid flows on the circuit board surface in the water tray, resulting in uniform neutralization and good effect. The neutralizing solution overflows into the neutralizing liquid tank through the overflow opening and is then pumped to the first spray component by the first filter pump, realizing the circulation of the neutralizing solution. The water washing mechanism of this scheme includes multiple washing tanks connected in series. The cleaning liquid overflows sequentially from the washing tank at the end of the conveying direction to the washing tank at the beginning, so that the cleaning liquid gradually becomes cleaner during the circuit board conveying and cleaning process, performing a tiered cleaning of the circuit board. The cleaner cleaning liquid flows in from the washing tank at the end and finally flows out from the washing tank at the beginning. Each washing tank is equipped with an independent second filter pump and multiple second spray components, and there is no cross-contamination between washing tanks.

[0007] In a preferred embodiment, all the secondary spray components in the cleaning tank are either slit-type water jets or nozzles, and the cleaning tank equipped with slit-type water jets is located upstream of the cleaning tank equipped with nozzles along the transmission direction.

[0008] Therefore, it can be seen that the cleaning fluid sprayed by the slit-type water jet at the front end of the transmission direction has a large flow rate and a slow speed, which can focus on cleaning the liquid on the surface of the circuit board, while the cleaning fluid sprayed by the nozzle at the rear end of the transmission direction has a small flow rate and a fast speed, which can focus on cleaning the residual liquid inside the holes of the circuit board.

[0009] A further option is to use a slit-type water jet as the first spray component.

[0010] It can be seen that the slit water jet has a slow speed and a large flow rate. After a large amount of neutralizing solution is pumped to the first spray component, it can flow relatively slowly in the water tray, which can fully neutralize the circuit board.

[0011] A further solution is to install a filter component between the connected input and output terminals.

[0012] Therefore, the filter components between adjacent cleaning tanks can filter impurities in the cleaning solution.

[0013] A further embodiment is that the bottom of the water pan is provided with a mounting slot, and the first spray component located below the transmission surface is installed in the mounting slot. The first spray component located below the transmission surface is installed in the water pan through the mounting slot and protrudes from the bottom of the water pan. The bottom of the water pan is provided with an upward protruding structure.

[0014] Therefore, since the first spray component located below the transmission surface needs to be installed inside the water pan, the depth of the water pan cannot be compressed. Setting multiple protruding structures can occupy the space inside the water pan, so that the water pan does not need to hold too much neutralizing liquid, thus improving the flow efficiency of the liquid.

[0015] A further design involves providing openable and closable drainage holes at the bottom of the water tray, between multiple raised structures.

[0016] Therefore, when it is necessary to clean the water tray, the drain hole can be opened to drain the liquid medicine inside the water tray.

[0017] A further embodiment is that the transmission line includes a transmission roller, and the side plates on both sides of the water pan along the width direction of the transmission direction are transmission guide plates. The transmission guide plates are provided with slots, and the transmission roller is installed in the slots.

[0018] Therefore, the side plates on both sides of the water pan can also be used to install transmission rollers, which can reduce the volume of the water pan and reduce the structural complexity of the water pan and transmission line.

[0019] A further embodiment includes multiple conveying rollers, including an upper conveying roller and a lower conveying roller arranged vertically, with a material passage between the upper and lower conveying rollers; the neutralization mechanism also includes a first water-blocking wheel, in the first slot in the conveying direction, the first water-blocking wheel, an upper conveying roller and a lower conveying roller are arranged from top to bottom, and the first water-blocking wheel abuts against the upper conveying roller; the neutralization mechanism also includes a second water-blocking wheel, in the last slot in the conveying direction, the second water-blocking wheel, an upper conveying roller and a lower conveying roller are arranged from top to bottom, and the second water-blocking wheel abuts against the upper conveying roller.

[0020] Therefore, the water-blocking rollers apply downward pressure to the upper conveyor rollers. When a circuit board passes between the upper and lower conveyor rollers, the upper and lower conveyor rollers are in close contact with the upper and lower sides of the circuit board. When there is a gap between two circuit boards being conveyed, the upper and lower conveyor rollers abut against each other. The first and second water-blocking rollers block water at the inlet and outlet of the water pan along the conveying direction, preventing the liquid medicine in the water pan from leaking out. Attached Figure Description

[0021] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0022] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0023] Figure 2 This is a structural diagram of the water tray after disassembly according to an embodiment of the present invention.

[0024] Figure 3 yes Figure 1 A magnified view of point A.

[0025] Figure 4 This is a schematic diagram of the water washing mechanism according to an embodiment of the present invention.

[0026] Figure 5 yes Figure 1 Enlarged view of point B. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Reference Figures 1 to 5 As shown, in order to better demonstrate the water washing mechanism 2, Figure 4 The partial structure of the washing mechanism is shown in the schematic diagram. This embodiment provides a circuit board neutralization and washing device, including a neutralization mechanism 1, a washing mechanism 2, and a conveyor line 3 that passes sequentially through the neutralization mechanism 1 and the washing mechanism 2 along the circuit board conveying direction. The conveyor line 3 consists of multiple conveying rollers 31 arranged sequentially along the conveying direction. The neutralization mechanism 1 includes a neutralization liquid tank 11 and a water tray 12 disposed inside and above the neutralization liquid tank 11. The conveyor line passes through the water tray 12 along the conveying direction, and the circuit board is conveyed through the water tray 12 via the conveyor line. Multiple slit water jets 121 are installed in the water pan 12 and are evenly distributed on the upper and lower sides of the conveying surface of the conveyor line 3. A first filter pump 111 is installed in the neutralizing liquid tank 11. The first filter pump 111 can draw the neutralizing liquid in the neutralizing liquid tank 11 and pump the neutralizing liquid to the slit water jets 121 and spray it toward the conveying surface. As the water jets continue to spray, the water level in the water pan 12 rises and overflows from the overflow opening 122 at the top of the water pan 12. The overflowing neutralizing liquid flows into the neutralizing liquid tank 11, completing the circulation of the neutralizing liquid.

[0029] like Figure 5 As shown, the portion of the conveyor line 3 that passes through the water pan 12 is all located below the horizontal line 15 of the overflow opening 122, allowing the circuit board to be immersed in the neutralizing solution in the water pan 12. In addition, the spraying end of the slit water jet 121 is all located below the horizontal line 15 of the overflow opening 122, and the sprayed neutralizing solution washes the circuit board in the liquid in the water pan 12.

[0030] In this embodiment, multiple mounting slots 123 are provided at the bottom of the water tray 12. The slit-type water jet 121 located on the side below the transmission surface is correspondingly installed in the mounting slot 123. Since the mounting slot 123 and the slit-type water jet 121 below the transmission surface are both located inside the water tray 12 and occupy a certain space, the depth of the water tray 12 cannot be compressed. In order to avoid the water tray 12 from holding too much neutralizing liquid and improve the flow efficiency of the liquid, multiple protruding structures 124 are also provided between the multiple mounting slots 123 at the bottom of the water tray 12 to occupy a certain space.

[0031] In this embodiment, the bottom of the water tray 12 is also provided with a plurality of openable and closable drain holes 125. The drain holes 125 are normally closed when the equipment is running. When it is necessary to clean the water tray 12, the drain holes 125 can be opened to drain the liquid in the water tray 12 before cleaning.

[0032] In this embodiment, as Figure 2 and Figure 3 As shown, the water tray 12 consists of a base plate 128, baffles 127 on both sides along the conveying direction, and side plates on both sides along the width direction along the conveying direction. The side plates on both sides along the width direction along the conveying direction are transmission guide plates 126, which are provided with multiple slots 1261. The transmission rollers 31 are divided into upper transmission rollers 311 and lower transmission rollers 312 arranged vertically, forming a material passage between the upper transmission rollers 311 and lower transmission rollers 312 to transport the circuit board. Each slot 1261 contains one upper transmission roller 311 and one lower transmission roller 312 arranged vertically. In addition, the neutralization mechanism 1 also includes a first water-blocking wheel 13 and a second water-blocking wheel 14. In the first slot 1261 along the transmission direction of the water pan 12, the first water-blocking wheel 13, an upper transmission roller 311, and a lower transmission roller 312 are arranged from top to bottom, with the first water-blocking wheel 13 abutting against the upper transmission roller 311. In the last slot 1261 along the transmission direction, the second water-blocking wheel 14, an upper transmission roller 311, and a lower transmission roller 312 are arranged from top to bottom, with the second water-blocking wheel 14 abutting against the upper transmission roller 311. The water-blocking wheel applies downward pressure to the upper transmission roller 311. When a circuit board passes between the upper transmission roller 311 and the lower transmission roller 312, the upper transmission roller 311 and the lower transmission roller 312 are in close contact with the upper and lower sides of the circuit board. When there is a gap between the transmission of two circuit boards, the upper transmission roller 311 and the lower transmission roller 312 abut against each other. The first and second water-blocking rollers 13 and 14 block water at the inlet and outlet of the water pan 12 along the transmission direction to prevent the liquid medicine in the water pan 12 from leaking out. In addition, since there may be gaps between the groove 1261 of the water pan 12 and the transmission roller 31 or the water-blocking rollers that could cause leakage, the amount of liquid medicine sprayed from the eight slits must be greater than the amount of water that leaks out, so that the liquid level in the water pan 12 can be flush with the overflow opening 122.

[0033] The washing mechanism 2 of the circuit board neutralization washing equipment provided in this embodiment includes five washing tanks 21 arranged sequentially along the transmission direction. The conveyor line 3 passes through these five washing tanks 21 sequentially. Figure 4As shown, between two adjacent cleaning tanks 21, along the transmission direction, the output end 211 of the latter cleaning tank 21 is connected to the input end 212 of the former cleaning tank 21; furthermore, between two adjacent cleaning tanks 21, along the transmission direction, the horizontal line of the output end 211 of the latter cleaning tank 21 is higher than the horizontal line of the input end 212 of the former cleaning tank 21. The water washing mechanism 2 of this embodiment also includes an inlet end 213 and an outlet end 214. The inlet end 213 is located in the last cleaning tank 21 along the transmission direction, and the outlet end 214 is located in the first cleaning tank 21 along the transmission direction. During equipment operation, the cleaner cleaning liquid flows into the last cleaning tank 21 along the transmission direction through the inlet end 213, overflows through the subsequent four cleaning tanks 21, and finally flows out from the outlet end 214 of the first cleaning tank 21 along the transmission direction. In this embodiment, a filter component 22 is provided between the connected input end 212 and output end 211 to filter the flowing cleaning liquid.

[0034] Each cleaning tank 21 is equipped with a second filter pump 215 and multiple second spray components 216. The second spray components 216 are distributed on the upper and lower sides of the transmission surface. The second filter pump 215 in each cleaning tank 21 can draw cleaning fluid from the current cleaning tank 21 and pump it to the multiple second spray components 216 in that cleaning tank 21 to clean the circuit board. The multiple second spray components 216 in each cleaning tank 21 are either slit water jets 217 or nozzles 218. Along the transmission direction, the cleaning tank 21 with slit water jets 217 is located upstream of the cleaning tank 21 with nozzles 218. The slit water jets 217 at the front end of the transmission direction spray a large flow rate and slow speed of cleaning fluid, which can focus on cleaning the cleaning fluid on the surface of the circuit board. The nozzles 218 at the rear end of the transmission direction spray a small flow rate and fast speed of cleaning fluid, which can focus on cleaning the residual cleaning fluid in the holes of the circuit board. The number of cleaning tanks 21 with slit water jets 217 and the number of cleaning tanks 218 with nozzles 218 can be set according to the actual production situation. In this embodiment, one cleaning tank 21 with slit water jets 217 and four cleaning tanks 218 with nozzles 218 are arranged sequentially along the transmission direction.

[0035] The above embodiments illustrate only one implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circuit board neutralization and washing device, comprising a neutralization mechanism, a washing mechanism, and a conveyor line passing sequentially through the neutralization mechanism and the washing mechanism along the circuit board conveying direction, characterized in that, The neutralization mechanism includes a water pan and a neutralization liquid tank. The neutralization liquid tank receives the overflow liquid from the water pan. The conveyor line passes through the water pan. A first filter pump is also installed in the neutralization liquid tank. Multiple first spray components are installed in the water pan. The multiple first spray components are distributed on the upper and lower sides of the conveyor line's transmission surface. The first filter pump is used to extract the liquid in the neutralization liquid tank and supply water for the spraying of the first spray components. The water pan is provided with an overflow opening, and the portion of the conveyor line passing through the water pan and the spraying end of the first spray component are both located below the horizontal line of the overflow opening; The washing mechanism includes at least two washing tanks arranged sequentially along the conveying direction, and the conveyor line passes through multiple washing tanks sequentially. Between two adjacent cleaning tanks, along the transmission direction, the output end of the latter cleaning tank is connected to the input end of the former cleaning tank; Between two adjacent cleaning tanks, along the transmission direction, the output end of the latter cleaning tank is higher than the input end of the former cleaning tank. The washing mechanism includes an inlet end and an outlet end. The inlet end is located in the last cleaning tank in the transmission direction, and the outlet end is located in the first cleaning tank in the transmission direction. The cleaning tank is equipped with a second filter pump and multiple second spray components. The multiple second spray components are distributed on the upper and lower sides of the transmission surface. The second filter pump is used to extract liquid from the cleaning tank and supply water for the spraying of the second spray components.

2. The circuit board neutralization and washing equipment according to claim 1, characterized in that, The multiple second spray components in the cleaning tank are either slit water jets or nozzles. Along the transmission direction, the cleaning tank equipped with the slit water jets is located upstream of the cleaning tank equipped with the nozzles.

3. The circuit board neutralization and washing equipment according to claim 1, characterized in that, The first spray component is a slit-type water jet.

4. The circuit board neutralization and washing equipment according to any one of claims 1 to 3, characterized in that, A filter component is provided between the connected input terminal and the output terminal.

5. The circuit board neutralization and washing equipment according to any one of claims 1 to 3, characterized in that, The bottom of the water tray is provided with a mounting slot. The first spray component located below the transmission surface is installed in the water tray through the mounting slot and protrudes from the bottom of the water tray. The bottom of the water tray is provided with an upward protruding structure.

6. The circuit board neutralization and washing equipment according to claim 5, characterized in that, The bottom of the water tray is also provided with openable and closable drainage holes between the multiple protruding structures.

7. The circuit board neutralization and washing apparatus according to any one of claims 1 to 3, characterized in that, The conveyor line includes a transmission roller, and the side plates on both sides of the water pan along the width direction of the transmission direction are transmission guide plates. The transmission guide plates are provided with slots, and the transmission roller is installed in the slots.

8. The circuit board neutralization and washing equipment according to claim 7, characterized in that, The plurality of the transfer rollers include an upper transfer roller and a lower transfer roller arranged vertically, with a material passage position formed between the upper transfer roller and the lower transfer roller; The neutralization mechanism further includes a first water-blocking wheel. In the first slot in the transmission direction, the first water-blocking wheel, an upper transmission roller, and a lower transmission roller are arranged from top to bottom, and the first water-blocking wheel abuts against the upper transmission roller. The neutralization mechanism further includes a second water-blocking wheel. In the last slot in the transmission direction, the second water-blocking wheel, an upper transmission roller, and a lower transmission roller are arranged from top to bottom, and the second water-blocking wheel abuts against the upper transmission roller.

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