Circuit board pretreatment equipment

Abstract

The utility model discloses circuit board pretreatment equipment, which relates to the technical field of circuit board preparation, and comprises a board grinding device and a water tank, a filter drawer is inserted into the side wall of the water tank, and the filter drawer is directly drawn out from the side wall of the water tank when replaced, so that the filter drawer is convenient to install and clean, the time for replacing the filter drawer is reduced, and the production efficiency is improved. Polishing liquid flows into the filter screen on the bottom face of the first drawer from the flow guide pipe to be filtered and then reaches the bottom of the water tank, the bottom face of the filtering drawer is supported by the conveying roller, and when the first drawer is pulled out, the second drawer slides to the position below the flow guide pipe in the length direction of the water tank, and the second drawer can continue to filter the polishing liquid; and when the filter screen of the first drawer cannot be filtered due to the fact that the filter screen is filled with chippings, the polishing liquid flows into the second drawer from the first hole to be filtered, and the situation that the polishing liquid cannot be filtered due to the fact that personnel do not find that the first drawer needs to be replaced is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board preparation, in particular to a circuit board pre-processing device. Background Art

[0002] Usually, in the production process of printed circuit boards (PCBs), in order to improve the bonding strength between solder mask ink and copper surface, a common physical treatment method is to use abrasive brushes and polishing fluid to deoxidize and roughen the copper surface. The abrasive brushes will produce wear and debris during the abrasive brushing process. The debris is mixed with the polishing fluid and then flushed on the surface of the circuit board, which may cause the debris to be stuck in the pores such as the copper-plated holes in the circuit board, causing the circuit board to be scrapped. At present, filtering equipment is used to remove the debris in the polishing fluid, but the filtering equipment is difficult to replace and the replacement time is long, resulting in a long equipment downtime, which is not conducive to improving production efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a circuit board pre-processing device to reduce the time for replacing the filtering device and improve the production efficiency.

[0004] According to an embodiment of the utility model, a circuit board pre-processing device is provided, comprising: a grinding plate device and a water tank, the grinding plate device comprising a spray pipe and a grinding brush roller, the spray pipe sprays grinding liquid, the grinding brush roller can rotate to grind the circuit board, and a guide pipe is provided at the bottom of the grinding plate device; a filter drawer is plugged into the side wall of the water tank, a filter screen is installed on the bottom surface of the filter drawer, the filter drawer comprises a first drawer and a second drawer whose sides abut against each other, the first drawer is located below the guide pipe, the grinding liquid flows from the guide pipe into the first drawer, and passes through the first drawer After filtration, it reaches the bottom of the water tank; the water tank is provided with a plurality of conveying rollers at intervals along its length direction, and both ends of the conveying rollers are rotatably connected to the side walls of the water tank, and a plurality of the conveying rollers support the bottom surface of the filtering drawer. When the first drawer is pulled out, the second drawer slides along the length direction of the water tank to the bottom of the guide pipe; the side wall of the first drawer is provided with a first hole, and the side wall of the second drawer is provided with a second hole, and the first hole and the second hole are connected. When the first drawer cannot filter, the polishing liquid flows from the first hole into the second drawer for filtration.

[0005] The circuit board pre-processing equipment described in the utility model has at least the following beneficial effects: the present embodiment is provided with a grinding plate device and a water tank, and a filter drawer is plugged into the side wall of the water tank. When the filter drawer is replaced, it is directly pulled out from the side wall of the water tank, which is convenient for the installation and cleaning of the filter drawer and saves the time for replacing the filter drawer. A filter screen is installed on the bottom surface of the filter drawer. The filter drawer includes a first drawer and a second drawer whose sides abut against each other. The grinding liquid flows into the first drawer from the guide pipe, and after being filtered by the filter screen on the bottom surface of the first drawer, it reaches the bottom of the water tank, thereby filtering the debris in the grinding liquid. The water tank is provided with a plurality of conveying rollers at intervals along its length direction, and both ends of the conveying rollers are rotatably connected to the side walls of the water tank. The conveying rollers support the bottom of the filter drawer. The surface is arranged so that the filter drawer can slide along the length direction of the water tank. When the first drawer needs maintenance and cleaning, the first drawer is pulled out, and the second drawer slides along the length direction of the water tank to the bottom of the guide pipe. The second drawer can continue to filter the polishing liquid, which is beneficial to reduce the time of replacing the filtering equipment, which is beneficial to reduce the equipment downtime and improve production efficiency. The first hole of the first drawer is connected with the second hole of the second drawer. When the filter screen of the first drawer is full of debris and cannot filter, the polishing liquid flows into the second drawer from the first hole for filtration, ensuring that the filter drawer can filter the polishing liquid and avoiding the failure to filter the polishing liquid due to the failure of personnel to replace the first drawer in time, so that the filter drawer can be used for a longer time and production efficiency is improved.

[0006] According to a circuit board pre-processing device described in the utility model, the filter drawer is provided with an outer panel, the side wall of the water tank is provided with an opening, the filter drawer is plugged into the opening, the outer panel is located in the opening, the outer panel is made of transparent acrylic material, and the outer panel can observe the filter drawer.

[0007] According to a circuit board pre-processing device described in the utility model, the filter drawer is provided with an installation frame and a fixed frame, the installation frame is located on the bottom surface of the filter drawer, the filter screen is located between the installation frame and the fixed frame, and the fixed frame and the filter screen are fixedly connected to the installation frame by bolts.

[0008] According to the circuit board pre-processing equipment described in the utility model, a height difference is provided between the first hole and the top surface of the first drawer.

[0009] According to a circuit board pre-processing device described in the utility model, a limit column is provided on the outer wall of the water tank, one end of the limit column is connected to the water tank through a bearing, the filter drawer is provided with a fixed rubber sleeve, and a groove is provided on the side of the fixed rubber sleeve. After the limit column is rotated, the end of the limit column away from the bearing can be clamped in the fixed rubber sleeve.

[0010] According to a circuit board pre-processing device described in the utility model, an anti-stop block is provided above the filter drawer, and the anti-stop block is located above the filter drawer. After the limit column rotates, the anti-stop block can support the limit column.

[0011] According to the circuit board pre-processing equipment described in the utility model, a sensor is installed on the inner wall of the water tank, and the sensor is located above the first drawer. The sensor is used to detect the position signal of the filter drawer.

[0012] According to the circuit board pre-processing equipment described in the utility model, a conveying roller is provided below the grinding device, and a plurality of the conveying rollers are arranged at intervals along the length direction of the water tank. A plurality of the conveying rollers are connected to a driving device so that the plurality of the conveying rollers can convey the circuit board.

[0013] According to a circuit board pre-processing device described in the utility model, a plurality of pressure rollers are provided above the conveying roller, the pressure rollers contact the upper surface of the circuit board, and the grinding plate device is located between two of the pressure rollers to prevent the circuit board from moving up and down during grinding.

[0014] According to the circuit board pre-processing equipment described in the utility model, a baffle is provided between the spray pipe and the pressure roller, and the polishing liquid can flow downward along the baffle.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is an isometric view of a circuit board pre-processing device in an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of a circuit board pre-processing device in an embodiment of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of the A part;

[0020] Figure 4 Bit Figure 2 A partial enlarged view of the B area;

[0021] Figure 5 It is an axonometric view of the filtering device in the embodiment of the utility model.

[0022] Reference numerals:

[0023] Grinding plate device 100; circuit board 101; spray pipe 110; nozzle 111; grinding brush roller 120;

[0024] Water tank 200; opening 201; water pump 210; conveying roller 220; bearing 230; limiting column 240; anti-stop block 250; sensor 260;

[0025] Filter drawer 300 ; outer plate 301 ; mounting frame 302 ; fixing frame 303 ; filter screen 304 ; fixing rubber sleeve 305 ; first drawer 310 ; first hole 311 ; second drawer 320 ; second hole 321 .

[0026] A grinding box 400 ; a flow guide tube 410 ; a pressure roller 420 ; a conveying roller 430 ; a baffle 440 ; and a cover plate 450 . DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 4The embodiment of the utility model provides a circuit board pre-treatment device, including a grinding plate device 100 and a water tank 200, the grinding plate device 100 includes a spray pipe 110 and a grinding brush roller 120, the spray pipe 110 sprays grinding liquid, and the grinding brush roller 120 can rotate to grind the circuit board 101 to grind the surface of the circuit board 101, and the bottom of the grinding plate device 100 is provided with a guide pipe 410, and the side wall of the water tank 200 is plugged with a filter drawer 300, and the bottom surface of the filter drawer 300 is installed with a filter screen 304, and the filter drawer 300 includes a first drawer 310 and a second drawer 320 with sides abutting each other. The first drawer 310 is located below the guide pipe 410, and the grinding liquid flows from the guide pipe 410 into the first drawer 310, and reaches the bottom of the water tank 200 after being filtered by the first drawer 310, so as to filter the debris of the grinding liquid, avoid the debris generated in the pre-treatment grinding from being stuck in the hole of the circuit board 101, and avoid The circuit board 101 does not need to be scrapped, and the filter drawer 300 is plugged into the water tank 200. When installing, replacing and cleaning the filter drawer 300, the filter drawer 300 can be directly pulled out or plugged in, which is conducive to the replacement of the filter drawer 300, saving the time for replacing the filter drawer 300 and saving the equipment downtime. The water tank 200 is provided with a plurality of conveying rollers 220 at intervals along the length direction. The two ends of the conveying rollers 220 are rotatably connected to the side walls of the water tank 200. The plurality of conveying rollers 220 support the bottom surface of the filter drawer 300. The filter drawer 300 can slide along the length direction of the water tank 200. When the first drawer 310 needs to be replaced or cleaned, the first drawer 310 is pulled out, and the second drawer 320 slides along the length direction of the water tank 200 to the bottom of the guide pipe 410. The second drawer 320 can continue to filter the polishing liquid, reducing the time for replacing the filtering equipment, saving the equipment downtime, and helping to improve production efficiency.

[0032] Reference Figure 3 and Figure 5 Optionally, a first hole 311 is provided on the side wall of the first drawer 310, and a second hole 321 is provided on the side wall of the second drawer 320. The first hole 311 and the second hole 321 are connected, and the polishing liquid can flow from the first hole 311 into the second hole 321. When there are too many debris in the filter screen 304 of the first drawer 310 and it cannot be filtered, the polishing liquid accumulates and rises in the first drawer 310, and the polishing liquid flows from the first hole into the second drawer 320, and is filtered through the filter screen 304 on the bottom surface of the second drawer 320, and reaches the bottom of the water tank 200 after filtration, so as to avoid the failure to filter the polishing liquid due to the failure of personnel to replace and clean the first drawer 310 in time, so that the filter drawer 300 can be used for a longer time, which is beneficial to improving production efficiency.

[0033] Reference Figure 1 and Figure 5Optionally, the filter drawer 300 is provided with an outer panel 301, the side wall of the water tank 200 is provided with an opening 201, the filter drawer 300 is plugged into the opening 201, the outer panel 301 of the filter drawer 300 is located in the opening 201, and the outer panel 301 is made of transparent acrylic material, so that the filter drawer 300 can be observed through the outer panel 301, so that personnel can timely inspect the filter drawer 300, avoid the filter screen 304 of the filter drawer 300 from accumulating debris and causing the polishing liquid to be unable to be filtered, and ensure that the filter drawer 300 can filter the polishing liquid.

[0034] Reference Figure 3 and Figure 5 Optionally, the filter drawer 300 is provided with a mounting frame 302 and a fixing frame 303, the mounting frame 302 is located at the bottom surface of the filter drawer 300, the filter screen 304 is located between the mounting frame 302 and the fixing frame 303, the fixing frame 303 and the filter screen 304 are fixedly connected to the mounting frame 302 by bolts, so that the filter screen 304 can be detachably installed on the mounting frame 302, which is beneficial to the replacement and cleaning of the filter screen 304 in the filter drawer 300.

[0035] Reference Figure 3 and Figure 5 Optionally, a height difference is provided between the first hole 311 and the top surface of the first drawer 310. When the filter 304 of the first drawer 310 is accumulated and cannot be filtered, the polishing liquid flows into the second drawer 320 from the first hole 311 of the first drawer 310, thereby preventing the polishing liquid from overflowing from the top surface of the first drawer 310 to the bottom of the water tank 200, thereby ensuring the filtration of the polishing liquid.

[0036] Reference Figure 1 and Figure 5 Optionally, a limiting column 240 is provided on the outer wall of the water tank 200, and one end of the limiting column 240 is connected to the water tank 200 through a bearing 230, so that the limiting column 240 can rotate in a vertical plane. The filter drawer 300 is provided with a fixed rubber sleeve 305, and the side wall of the fixed rubber sleeve 305 is provided with a groove. The fixed rubber sleeve 305 is located on the outer plate 301, and the filter drawer 300 is inserted into the opening 201 of the water tank 200. After the limiting column 240 rotates, one end of the limiting column 240 away from the bearing 230 is clamped on the fixed rubber sleeve 305, so that the filter drawer 300 is fixed in the water tank 200, preventing the filter drawer 300 from sliding out of the opening 201 during use.

[0037] It can be understood that one end of the limit column 240 connected to the bearing 230 is located above the opening 201. Due to the effect of gravity, after the limit column 240 rotates, the end of the limit column 240 away from the bearing 230 is located on the side of the filter drawer 300, which is conducive to fixing the filter drawer 300 after the limit column 240 rotates.

[0038] Reference Figure 1 and Figure 5Optionally, the water tank 200 is provided with an anti-blocking block 250 on the side wall of the opening 201, and the anti-blocking block 250 is located above the opening 201. When removing the filter drawer 300, the limiting column 240 is rotated. After the limiting column 240 is separated from the fixed rubber sleeve 305, the limiting column 240 is rotated so that the limiting column 240 is supported on the anti-blocking block 250, and the filter drawer 300 can be pulled out from the opening 201. When installing the filter drawer 300, the anti-blocking block supports the limiting column 240 so that the filter drawer 300 can be directly plugged into the opening 201, thereby preventing the limiting column 240 from hindering the installation and disassembly of the filter drawer 300.

[0039] Reference Figure 2 and Figure 5 Optionally, a sensor 260 is installed on the inner wall of the water tank 200, and the sensor 260 is located above the first drawer 310. The sensor 260 is used to detect the position signal of the filter drawer 300 to ensure that the filter drawer 300 is provided below the guide tube 410 to ensure that the filter drawer 300 can filter the polishing liquid.

[0040] Reference Figure 1 and Figure 2 Optionally, a circuit board pre-processing device described in some embodiments of the utility model is further provided with a polishing box 400, a plurality of polishing devices 100 are installed in the polishing box 400 at intervals along the length direction of the polishing box 400, and both ends of the polishing brush roller 120 are rotatably connected to the side walls of the polishing box 400.

[0041] Reference Figure 2 Optionally, a conveying roller 430 is provided under the grinding device 100, and both ends of the conveying roller 430 are rotatably connected to the grinding box 400. Several conveying rollers 430 are arranged at intervals along the length direction of the water tank 200. Several conveying rollers 430 are connected to a driving device so that several conveying rollers 430 can convey the circuit board 101, thereby realizing the automatic conveyance of the circuit board 101 in the pre-treatment grinding of the circuit board 101.

[0042] Reference Figure 2 Optionally, a plurality of pressure rollers 420 are provided above the conveying roller 430, and both ends of the pressure rollers 420 are rotatably connected to the polishing box 400. The pressure rollers 420 contact the upper surface of the circuit board 101, and the pressure rollers 420 are used to prevent the circuit board 101 from moving up and down during the polishing process. The grinding device 100 is located between the two pressure rollers 420, that is, the spray pipe 110 and the grinding brush roller 120 are located between the two pressure rollers 420, so that when the grinding device 100 polishes the circuit board 101, the pressure rollers 420 prevent the circuit board 101 from moving up and down, thereby ensuring that the surface of the circuit board 101 is evenly polished.

[0043] Reference Figure 4Optionally, a baffle 440 is provided between the spray pipe 110 and the pressure roller 420, and the polishing liquid can flow downward along the baffle 440, so that the spray pipe 110 can fall on the surface of the circuit board 101 along the baffle 440, ensuring that the polishing liquid falls on the circuit board 101 and the circuit board 101 is polished.

[0044] It can be understood that the pressure roller 420 and the grinding brush roller 120 are respectively connected to a driving device, the rotation direction of the pressure roller 420 is opposite to the rotation direction of the conveying roller 430, and the rotation direction of the grinding brush roller 120 is opposite to the rotation direction of the conveying roller 430, which is beneficial to the transmission of the circuit board 101.

[0045] It is understandable that the water tank 200 is connected to a water pump 210, and the water pump 210 transports the polishing liquid at the bottom of the water tank 200 to the spray pipe 110, so as to realize the recycling of the polishing liquid.

[0046] Reference Figure 4 The spray pipe 110 is provided with a plurality of nozzles 111 along its axial direction. The nozzles 111 are located above the circuit board 101 . The nozzles 111 continuously spray polishing liquid onto the surface of the circuit board 101 .

[0047] Reference Figure 1 and Figure 2 Optionally, a cover plate 450 is provided on the top of the grinding box 400 , and the cover plate 450 can be opened upward, which is conducive to the maintenance and inspection of the grinding plate device 100 , the pressure roller 420 and other structures inside the grinding box 400 .

[0048] It is understandable that the polishing liquid can be a volcanic ash solution, or other solutions used for pre-treatment of the circuit board 101, which can be selected according to actual production applications, and this application does not make a sole limitation.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A circuit board pre-processing device, characterized in that: include: The plate grinding device comprises a spray pipe and a grinding brush roller, wherein the spray pipe sprays a grinding liquid, the grinding brush roller can rotate to grind the circuit board, and a guide pipe is provided at the bottom of the plate grinding device; A water tank, wherein a filter drawer is inserted into a side wall of the water tank, a filter screen is installed on the bottom surface of the filter drawer, the filter drawer comprises a first drawer and a second drawer whose sides abut against each other, the first drawer is located below the guide pipe, the polishing liquid flows from the guide pipe into the first drawer, and reaches the bottom of the water tank after being filtered by the first drawer; The water tank is provided with a plurality of conveying rollers at intervals along the length direction thereof, and both ends of the conveying rollers are rotatably connected to the side walls of the water tank, and the plurality of conveying rollers support the bottom surface of the filter drawer, and when the first drawer is pulled out, the second drawer slides along the length direction of the water tank to the bottom of the guide pipe; A first hole is provided on the side wall of the first drawer, and a second hole is provided on the side wall of the second drawer. The first hole and the second hole are connected. When the first drawer cannot filter, the polishing liquid flows from the first hole into the second drawer for filtering.

2. A circuit board pre-processing device according to claim 1, characterized in that: The filter drawer is provided with an outer plate, the side wall of the water tank is provided with an opening, the filter drawer is plugged into the opening, the outer plate is located in the opening, the outer plate is made of transparent acrylic material, and the filter drawer can be observed through the outer plate.

3. A circuit board pre-processing device according to claim 1, characterized in that: The filter drawer is provided with an installation frame and a fixing frame, the installation frame is located on the bottom surface of the filter drawer, the filter screen is located between the installation frame and the fixing frame, and the fixing frame and the filter screen are fixedly connected to the installation frame by bolts.

4. A circuit board pre-processing device according to claim 1, characterized in that: A height difference is provided between the first hole and the top surface of the first drawer.

5. The circuit board pre-processing equipment according to claim 1, characterized in that: The outer wall of the water tank is provided with a limit column, one end of the limit column is connected to the water tank through a bearing, the filter drawer is provided with a fixed rubber sleeve, and the side of the fixed rubber sleeve is provided with a groove. After the limit column is rotated, the end of the limit column away from the bearing can be clamped in the fixed rubber sleeve.

6. A circuit board pre-processing device according to claim 5, characterized in that: An anti-stop block is provided above the filter drawer, and the anti-stop block is located above the filter drawer. After the limiting column rotates, the anti-stop block can support the limiting column.

7. A circuit board pre-processing device according to claim 1, characterized in that: A sensor is installed on the inner wall of the water tank. The sensor is located above the first drawer and is used to detect a position signal of the filter drawer.

8. The circuit board pre-processing equipment according to claim 1, characterized in that: A conveying roller is provided below the grinding plate device, and a plurality of the conveying rollers are arranged at intervals along the length direction of the water tank. A plurality of the conveying rollers are connected to a driving device so that the plurality of the conveying rollers can convey the circuit board.

9. A circuit board pre-processing device according to claim 8, characterized in that: A plurality of pressure rollers are arranged above the conveying rollers, and the pressure rollers contact the upper surface of the circuit board. The grinding plate device is located between two of the pressure rollers to prevent the circuit board from moving up and down during the grinding process.

10. A circuit board pre-processing device according to claim 9, characterized in that: A baffle is provided between the spray pipe and the pressure roller, and the polishing liquid can flow downward along the baffle.

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