A post-developing water washing tank oil stain filtering device

Abstract

The utility model discloses a kind of oil dirt filtering devices of developing post washing tank, it is related to PCB circuit board production auxiliary device technical field, including washing tank, still including primary oil dirt filtering mechanism, secondary oil dirt filtering mechanism and filter box positioning fixed mechanism, secondary oil dirt filtering mechanism contains secondary filter box and oil absorption cotton block, the secondary filter box is located at the front end below washing tank, the bottom of secondary filter box is rectangular array and is provided with through-hole, and three off bottom support rods are horizontally equidistant in secondary filter box inner bottom, and oil absorption cotton block is placed in the upside of the second supporting mesh plate, the upside of the second supporting mesh plate is placed with oil absorption cotton block, filter box positioning fixed mechanism is installed in the top rear end of secondary filter box two sides.The oil dirt filtering device of developing post washing tank, additional secondary oil dirt filtering mechanism, through laying oil absorption cotton block in secondary filter box and filtering oil dirt in water, can ensure that oil dirt is fully captured.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for PCB circuit board production, specifically a device for filtering oil stains in a post-developing water washing tank. Background Technology

[0002] In the PCB manufacturing process, after the developing process, the board must be thoroughly rinsed in a water washing tank to remove residual developer and dissolved resist components from the board surface. During this process, organic oily substances from the developer and resist (commonly known as "developer oil stains") easily accumulate in the water washing tank. The main reasons include: first, organic components such as resins and photoinitiators in dry film and other resists partially emulsify or dissolve during the developing process and are carried into the water washing tank with the water flow; second, trace amounts of lubricating grease may be introduced into the equipment's transmission components; and third, oil stains are not easily dissolved in water and tend to gradually adhere and accumulate on the water surface, tank walls, and circulation system.

[0003] Oil buildup in the washing tank can re-adhere to the board surface, forming contamination points that can lead to defects in subsequent etching or copper plating processes, affecting circuit accuracy and reliability. Oil can also reduce the washing effect, increase water consumption and subsequent wastewater treatment load, and may clog nozzles, pumps, valves and filtration systems, affecting the stable operation of the equipment.

[0004] In existing technologies, oil-absorbing cotton or oil-absorbing felt is installed above the washing tank to intercept floating oil stains based on their adsorption properties. However, oily wastewater tends to flow around the sides and edges of the oil-absorbing cotton during circulation and when panels are entering and exiting, resulting in the oil stains not being fully captured. Utility Model Content

[0005] The technical problem this invention aims to solve is to overcome existing defects and provide a device for filtering oil stains in a post-developing water washing tank. This device adds a secondary oil filtration mechanism, using absorbent cotton blocks placed inside the secondary filter box to filter oil stains in the water. This ensures that the oil stains are fully captured, preventing them from adhering to the PCB circuit board surface during washing. This effectively improves circuit accuracy and reliability, enhances the washing effect, reduces water consumption and subsequent wastewater treatment load, prevents clogging of nozzles, pumps, valves, and the filtration system, and promotes stable equipment operation. This invention effectively solves the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for filtering oil stains in a post-development water washing tank, comprising a water washing tank, and further comprising: The primary oil filtration system is installed at the top inside the washing tank. The secondary oil filtration mechanism includes a secondary filter box, through holes, bottom support rods, feet, a second mesh support plate, and oil-absorbing cotton blocks. The secondary filter box is located below the front end of the washing tank. The bottom of the secondary filter box has through holes arranged in a rectangular array. Three bottom support rods are arranged horizontally at equal intervals inside the bottom of the secondary filter box. The second mesh support plate is placed on the bottom support rods. Oil-absorbing cotton blocks are placed on the upper side of the second mesh support plate. Four feet are installed at the four corners of the bottom of the secondary filter box. The filter box positioning and fixing mechanism is installed on both sides of the top and rear end of the secondary filter box.

[0007] The primary oil filtration mechanism filters the circulating water for the first time. The clean water falls into the washing tank to wash the PCB circuit board. The washed water falls from the front of the washing tank into the top of the secondary filter box. After being filtered by the oil-absorbing cotton block, it enters the bottom of the secondary filter box through the mesh on the second liner plate. The filtered water then flows away through the through hole and can be pumped away by the circulation pump for reuse. The bottom support rod moves the second liner plate away from the bottom of the secondary filter box, allowing water seeping from the oil-absorbing cotton block to flow quickly through the mesh on the second liner plate to the through hole and then be discharged. The support legs support the secondary filter box, allowing water to drain away from the bottom of the secondary filter box after passing through the through hole. The filter box positioning and fixing mechanism limits and fixes the secondary filter box to prevent the secondary filter box from shifting relative to the washing tank due to the impact of the water flow.

[0008] Furthermore, the secondary oil filtration mechanism also includes an edge pressing frame. An edge pressing frame is provided on the top inner side of the secondary filter box, and the bottom of the edge pressing frame presses against the upper edge of the oil-absorbing cotton block. The edge pressing frame presses down on the upper side of the oil-absorbing cotton block, preventing water from falling along the gap between the oil-absorbing cotton block and the inner wall of the secondary filter box, ensuring that water is effectively filtered by the oil-absorbing cotton block.

[0009] Furthermore, the secondary oil filtration mechanism also includes a rectangular limiting groove and a rectangular sealing frame. The upper edge of the oil-absorbing cotton block has a rectangular limiting groove, and the bottom of the edge pressing frame has a rectangular sealing frame that mates with the rectangular limiting groove. The rectangular limiting groove and the rectangular sealing frame work together to further prevent water from falling through the gap between the oil-absorbing cotton block and the inner wall of the secondary filter box. The edge pressing frame and the rectangular sealing frame are integrally formed and connected, and can be made of a flexible material that does not react with oil and water.

[0010] Furthermore, the filter box positioning and fixing mechanism includes a fixing seat, a positioning vertical plate, nuts, positioning bolts, and positioning grooves. Two fixing seats are fixedly connected to the bottom ends of two positioning vertical plates on both sides of the top rear end of the secondary filter box. Two nuts are embedded in the top of each of the two positioning vertical plates, and two transverse positioning bolts are threaded into each nut. Two positioning grooves are respectively formed on both sides of the bottom front end of the washing tank. The ends of the two positioning bolts near the washing tank extend into the corresponding positioning grooves. The fixing seat is used to install the positioning vertical plate. Twisting the positioning bolts allows them to move left and right relative to the nuts. When the positioning bolts extend into the positioning grooves, the relative positions of the washing tank and the secondary filter box are fixed, preventing the secondary filter box from shifting due to water flow impact.

[0011] Furthermore, the primary oil filtration mechanism includes support strips, a filter frame, a liner mesh plate, and an oil-absorbing cotton pad. Two support strips are respectively installed at the top of the washing tank, and the filter frame rests on the two support strips on both sides. A liner mesh plate is installed at the bottom of the filter frame, and an oil-absorbing cotton pad is placed on top of the liner mesh plate. The support strips support the filter frame, and the liner mesh plate inside the filter frame supports the oil-absorbing cotton pad. When water and oil fall onto the oil-absorbing cotton pad, the water seeps down, while the oil is absorbed and retained by the oil-absorbing cotton pad.

[0012] Furthermore, the primary oil filtration mechanism also includes limiting grooves and limiting strips. Each support strip has a limiting groove on its upper side, and two limiting strips are fixedly connected to the bottom of each side of the filter frame. The limiting strips engage with their corresponding limiting grooves. The engagement of the limiting grooves and limiting strips prevents the filter frame from moving back and forth relative to the support strips, improving the stability of the filter frame installation.

[0013] Furthermore, the primary oil filtration mechanism also includes baffles. Four baffles are fixedly connected to the top four corners of the filter frame, and the bottoms of the four baffles press against the upper sides of the four corners of the oil-absorbing cotton pad. The baffles limit the upper side of the oil-absorbing cotton pad, preventing the oil-absorbing cotton pad from moving relative to the filter frame due to water flow impact.

[0014] Compared with existing technologies, the beneficial effects of this post-developing water washing tank oil filtration device are: 1. The post-development water washing tank oil filtration device is equipped with a secondary oil filtration mechanism. By lining the secondary filter box with oil-absorbing cotton blocks, the oil in the water is filtered to ensure that the oil is fully captured.

[0015] 2. The post-development washing tank oil filtration device prevents oil from adhering to the PCB circuit board surface during washing, effectively improving circuit accuracy and reliability, enhancing washing effect, reducing water consumption and subsequent wastewater treatment load, preventing clogging of nozzles, pumps, valves, and the filtration system, and facilitating stable equipment operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a schematic diagram of the primary oil filtration mechanism in this utility model; Figure 4 This is a schematic diagram of the structure of the two-stage oil filtration mechanism in this utility model; In the diagram: 1. Washing tank; 2. Primary oil filtration mechanism; 21. Support bar; 22. Limiting groove; 23. Filter frame; 24. Lining mesh plate I; 25. Stop block; 26. Limiting bar; 27. Oil-absorbing cotton pad; 3. Secondary oil filtration mechanism; 31. Secondary filter box; 32. Through hole; 33. Bottom support rod; 34. Support leg; 35. Lining mesh plate II; 36. Oil-absorbing cotton block; 37. Rectangular limiting groove; 38. Edge pressure frame; 39. Rectangular sealing frame; 4. Filter box positioning and fixing mechanism; 41. Fixing seat; 42. Positioning vertical plate; 43. Nut; 44. Positioning bolt; 45. Positioning groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1, please refer to Figures 1 to 4 This utility model provides a technical solution: a device for filtering oil stains in a water washing tank after development, including a water washing tank 1, and also provided with a primary oil stain filtration mechanism 2, a secondary oil stain filtration mechanism 3, and a filter box positioning and fixing mechanism 4.

[0019] The primary oil filtration unit 2 is installed at the top inside the water washing tank 1.

[0020] The secondary oil filtration mechanism 3 includes a secondary filter box 31, through holes 32, bottom support rods 33, support feet 34, a second mesh plate 35, and oil-absorbing cotton blocks 36. The secondary filter box 31 is located below the front end of the washing tank 1. The bottom of the secondary filter box 31 has through holes 32 arranged in a rectangular array. Three bottom support rods 33 are arranged horizontally at equal intervals inside the bottom of the secondary filter box 31. The second mesh plate 35 is placed on the bottom support rods 33. Oil-absorbing cotton blocks 36 are placed on the upper side of the second mesh plate 35. Four support feet 34 are installed at the four corners of the bottom of the secondary filter box 31.

[0021] The secondary oil filtration mechanism 3 also includes an edge pressing frame 38. The edge pressing frame 38 is provided on the top inner side of the secondary filter box 31, and the bottom of the edge pressing frame 38 presses against the upper edge of the oil-absorbing cotton block 36. The edge pressing frame 38 presses down on the upper side of the oil-absorbing cotton block 36 to prevent water from falling along the gap between the oil-absorbing cotton block 36 and the inner wall of the secondary filter box 31, ensuring that water is effectively filtered by the oil-absorbing cotton block 36.

[0022] The secondary oil filtration mechanism 3 also includes a rectangular limiting groove 37 and a rectangular sealing frame 39. The upper edge of the oil-absorbing cotton block 36 has a rectangular limiting groove 37, and the bottom of the edge pressing frame 38 has a rectangular sealing frame 39 that mates with the rectangular limiting groove 37. The rectangular limiting groove 37 and the rectangular sealing frame 39 work together to further prevent water from falling along the gap between the oil-absorbing cotton block 36 and the inner wall of the secondary filter box 31. The edge pressing frame 38 and the rectangular sealing frame 39 are integrally formed and connected. The edge pressing frame 38 and the rectangular sealing frame 39 can be made of a flexible material that does not react with oil and water.

[0023] The filter box positioning and fixing mechanism 4 is installed on both sides of the top rear end of the secondary filter box 31.

[0024] In use, the primary oil filtration mechanism 2 can perform the first oil filtration on the water circulating in the washing system. The clean water falls into the washing tank 1 to wash the surface of the PCB circuit board. The washed water falls from the front end of the washing tank 1 into the top of the secondary filter box 31. After being filtered by the oil-absorbing cotton block 36, it enters the bottom of the secondary filter box 31 through the mesh on the supporting mesh plate 35. Then, the filtered water flows away through the through hole 32 and can be pumped away by the circulation pump for the next use. The bottom support rod 33 moves the supporting mesh plate 35 away from the bottom of the secondary filter box 31, which facilitates the water seeping out of the oil-absorbing cotton block 36 to flow quickly through the mesh on the supporting mesh plate 35 to the through hole 32 and then be discharged. The support leg 34 supports the secondary filter box 31, which facilitates the water to be discharged from the bottom of the secondary filter box 31 after passing through the through hole 32. The filter box positioning and fixing mechanism 4 limits and fixes the secondary filter box 31 to prevent the secondary filter box 31 from shifting relative to the washing tank 1 due to the impact of the water flow.

[0025] Example 2, please refer to Figures 1 to 4 This utility model provides a technical solution: a device for filtering oil stains in a post-developing water washing tank. This embodiment is a further explanation of the structure of Embodiment 1. The filter box positioning and fixing mechanism 4 includes a fixing seat 41, a positioning vertical plate 42, a nut 43, a positioning bolt 44, and a positioning groove 45. Two fixing seats 41 are fixedly connected to the bottom ends of two positioning vertical plates 42 on both sides of the top and rear ends of the secondary filter box 31. Two nuts 43 are respectively embedded in the top of the two positioning vertical plates 42, and two horizontal positioning bolts 44 are threaded into each of the two nuts 43. Two positioning grooves 45 are respectively opened on both sides of the bottom of the front end of the washing tank 1, and the ends of the two positioning bolts 44 near the washing tank 1 extend into the corresponding positioning grooves 45. The fixing seat 41 is used to install the positioning vertical plate 42. Twisting the positioning bolts 44 allows them to move left and right relative to the nuts 43. When the positioning bolts 44 extend into the positioning grooves 45, the relative positions of the washing tank 1 and the secondary filter box 31 are fixed, preventing the secondary filter box 31 from shifting due to water flow impact.

[0026] Example 3, please refer to Figures 1 to 4 This utility model provides a technical solution: a device for filtering oil stains in a post-development water washing tank. This embodiment is a further explanation of the structure of Embodiment 2. The primary oil filtration mechanism 2 includes support strips 21, a filter frame 23, a lining mesh plate 24, and an oil-absorbing cotton pad 27. Two support strips 21 are respectively installed at the top of the washing tank 1. The filter frame 23 is placed on the two support strips 21 on both sides. The lining mesh plate 24 is installed at the bottom of the filter frame 23, and the oil-absorbing cotton pad 27 is placed on the upper side of the lining mesh plate 24. The support strips 21 support the filter frame 23, and the lining mesh plate 24 inside the filter frame 23 supports the oil-absorbing cotton pad 27. When water and oil fall onto the oil-absorbing cotton pad 27, the water seeps down, while the oil is absorbed and retained by the oil-absorbing cotton pad 27.

[0027] The primary oil filtration mechanism 2 also includes limiting grooves 22 and limiting strips 26. Each support strip 21 has a limiting groove 22 on its upper side, and two limiting strips 26 are fixedly connected to the bottom of both sides of the filter frame 23. The limiting strips 26 engage with the corresponding limiting grooves 22. The engagement of the limiting grooves 22 and the limiting strips 26 prevents the filter frame 23 from moving back and forth relative to the support strips 21, thus improving the stability of the filter frame 23 during installation.

[0028] The primary oil filtration mechanism 2 also includes baffles 25. Four baffles 25 are fixedly connected to the top four corners of the filter frame 23, and the bottoms of the four baffles 25 press against the upper sides of the four corners of the oil-absorbing cotton pad 27. The baffles 25 limit the upper side of the oil-absorbing cotton pad 27 to prevent the oil-absorbing cotton pad 27 from moving relative to the filter frame 23 due to water flow impact.

[0029] It is worth noting that the secondary filter box 31 disclosed in the above embodiments is made of acrylic material.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for filtering oil stains in a post-development washing tank, comprising a washing tank (1), characterized in that, Also includes: The primary oil filtration mechanism (2) is installed at the top inside the water washing tank (1); The secondary oil filtration mechanism (3) includes a secondary filter box (31), through holes (32), bottom support rods (33), support feet (34), a second mesh plate (35), and an oil-absorbing cotton block (36). The secondary filter box (31) is located below the front end of the washing tank (1). The bottom of the secondary filter box (31) has through holes (32) arranged in a rectangular array. Three bottom support rods (33) are arranged horizontally at equal intervals at the bottom of the secondary filter box (31). The second mesh plate (35) is placed on the bottom support rods (33). An oil-absorbing cotton block (36) is placed on the upper side of the second mesh plate (35). Four support feet (34) are installed at the four corners of the bottom of the secondary filter box (31). The filter box positioning and fixing mechanism (4) is installed on both sides of the top rear end of the secondary filter box (31).

2. The device for filtering oil stains in a post-developing water washing tank according to claim 1, characterized in that: The secondary oil filtration mechanism (3) also includes an edge pressing frame (38). The edge pressing frame (38) is provided on the inner side of the top of the secondary filter box (31), and the bottom of the edge pressing frame (38) presses the upper edge of the oil-absorbing cotton block (36).

3. The device for filtering oil stains in a post-developing water washing tank according to claim 2, characterized in that: The secondary oil filtration mechanism (3) also includes a rectangular limiting groove (37) and a rectangular sealing frame (39). The upper edge of the oil-absorbing cotton block (36) is provided with a rectangular limiting groove (37), and the bottom of the edge pressing frame (38) is provided with a rectangular sealing frame (39) that cooperates with the rectangular limiting groove (37).

4. The device for filtering oil stains in a post-developing water washing tank according to claim 1, characterized in that: The filter box positioning and fixing mechanism (4) includes a fixing seat (41), a positioning vertical plate (42), a nut (43), a positioning bolt (44), and a positioning groove (45). The top and rear ends of the secondary filter box (31) are fixedly connected to the bottom ends of the two positioning vertical plates (42). The top of the two positioning vertical plates (42) are respectively inlaid with two nuts (43). The two nuts (43) are respectively threaded with two horizontal positioning bolts (44). The front bottom of the water washing tank (1) is provided with two positioning grooves (45). The ends of the two positioning bolts (44) near the water washing tank (1) are respectively inserted into the corresponding positioning grooves (45).

5. The device for filtering oil stains in a post-developing water washing tank according to claim 1, characterized in that: The primary oil filtration mechanism (2) includes a support strip (21), a filter frame (23), a lining mesh plate (24), and an oil-absorbing cotton pad (27). Two support strips (21) are respectively provided at the top of the water washing tank (1). The two sides of the filter frame (23) are respectively placed on the two support strips (21). The bottom of the filter frame (23) is provided with a lining mesh plate (24), and an oil-absorbing cotton pad (27) is placed on the upper side of the lining mesh plate (24).

6. The device for filtering oil stains in a post-developing water washing tank according to claim 5, characterized in that: The primary oil filtration mechanism (2) also includes a limiting groove (22) and a limiting strip (26). Each support strip (21) has a limiting groove (22) on its upper side. Two limiting strips (26) are fixedly connected to the bottom of both sides of the filter frame (23). The limiting strips (26) are engaged with the corresponding limiting grooves (22).

7. The device for filtering oil stains in a post-developing water washing tank according to claim 6, characterized in that: The primary oil filtration mechanism (2) also includes a baffle (25). Four baffles (25) are fixedly connected to the top four corners of the filter frame (23). The bottoms of the four baffles (25) press against the upper sides of the four corners of the oil-absorbing cotton pad (27).

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