A developing solution circulating filter device

Abstract

The utility model discloses a kind of developing chemical water circulating filtration devices, belong to PCB manufacturing technical field;It includes the developing tank for storing developing chemical water, further include sequentially connected solid filter assembly, liquid drive assembly and ink filter assembly;The one end of solid filter assembly is communicated with the bottom of developing tank, to filter solid material from developing chemical water;The two ends of liquid drive assembly are respectively communicated with solid filter assembly and ink filter assembly, to drive developing chemical water circulating flow;Ink filter assembly includes connecting pipe body, first suction accessory for adsorbing grease, second suction accessory for adsorbing organic matter and third suction accessory for adsorbing polar molecules, the two ends of connecting pipe body are respectively connected with liquid drive assembly and the top of developing tank, first suction accessory, second suction accessory and third suction accessory are respectively detachably connected with connecting pipe body.The utility model can continuously circulate purification to developing chemical water.

Description

Technical Field

[0001] This utility model relates to the field of PCB board manufacturing technology, and in particular to a developing solution circulation filtration device. Background Technology

[0002] In the PCB manufacturing process, the etching process requires the use of developing solutions to remove photoresist.

[0003] In existing technologies, developing solutions gradually dissolve impurities such as ink during recycling, leading to increased viscosity and decreased concentration of active ingredients. These impurities mainly include solid particles, oily substances, organic compounds, and polar molecules. As the number of cycles increases, the accumulation of impurities significantly reduces the activity of the developing solution, typically requiring the machine to be shut down and the solution replaced after 6 hours of use.

[0004] This frequent maintenance not only wastes developing chemicals but also seriously affects production efficiency. Utility Model Content

[0005] In view of this, it is necessary to provide a developer solution circulation and filtration device to solve the problem of ink contamination in existing developer solutions, which requires regular shutdowns for replacement and maintenance, thus affecting production efficiency.

[0006] This utility model provides a developer solution circulation filtration device, including a developer tank for storing developer solution, and a solid filter component, a liquid drive component and an ink filter component connected in sequence.

[0007] One end of the solid filter assembly is connected to the bottom of the developing tank to filter solid substances from the developing solution;

[0008] The two ends of the liquid driving component are respectively connected to the solid filter component and the ink filter component to drive the developer solution to circulate.

[0009] The ink filtration assembly includes a connecting tube, a first adsorbent for adsorbing grease, a second adsorbent for adsorbing organic matter, and a third adsorbent for adsorbing polar molecules. The two ends of the connecting tube are respectively connected to the top of the liquid driving assembly and the developing tank. The first adsorbent, the second adsorbent, and the third adsorbent are detachably connected to the connecting tube.

[0010] Furthermore, the third adsorption element includes a third tank and a polar tank disposed in the third tank. The polar tank is arranged in a spiral configuration and is capable of adsorbing polar molecules in the developing solution.

[0011] Furthermore, the polar tank includes a spirally arranged central axis and polar plates for adsorbing polar molecules. A plurality of polar plates are equidistantly arranged around the central axis, and a gap is formed between two polar plates for the development solution to pass through.

[0012] Furthermore, the tank body is provided with a spiral hole, and the polar groove is inserted into the spiral hole.

[0013] Furthermore, the second adsorbent includes a second tank and an activated carbon filling layer for adsorbing organic matter, the activated carbon filling layer being filled in the second tank.

[0014] Furthermore, the third adsorption element includes a first tank and an adsorption cotton filling layer for adsorbing grease, the adsorption cotton filling layer being filled in the first tank.

[0015] Furthermore, the connecting tube body includes multiple connectors, an input tube, and an output tube. The middle portions of the input tube and the output tube are respectively sealed to the connectors. The distance between the end of the input tube and the connector is longer than the distance between the output tube and the connector. The first adsorption element, the second adsorption element, and the third adsorption element are detachably connected to the connectors.

[0016] Furthermore, the first, second, and third adsorption components are connected to the connector via snap-fit, threaded connection, or quick-connect coupling.

[0017] Furthermore, the solid filtration assembly includes a filter cartridge and a filter element, the filter element being movably installed in the filter cartridge, the bottom of the filter cartridge being connected to the bottom of the developing tank via a pipe, and the top of the filter cartridge being connected to the liquid driving assembly via a pipe.

[0018] Furthermore, the liquid driving assembly includes a driving pump, which is connected to the filter cartridge and the ink filtering assembly via pipes.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention discloses a developer solution circulation filtration device, which includes an ink filtration assembly comprising a connecting tube, a first adsorbent, a second adsorbent, and a third adsorbent. The first adsorbent removes grease from the developer solution, the second adsorbent adsorbs organic matter, and the third adsorbent captures polar molecules in the developer solution, thus separating the ink and developer solution. The first, second, and third adsorbents are detachably connected to the connecting tube, allowing for maintenance without interrupting the entire system; only specific faulty components need to be replaced. The connecting tube is connected at both ends to the outlet of a liquid drive assembly and the top of the developing tank. The liquid drive assembly drives the developer solution through the first, second, and third adsorbents to separate the ink, and then re-exports the relatively pure developer solution back to the developing tank, achieving the recycling of the developer solution. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the connection structure of the solid filter assembly, liquid drive assembly, and ink filter assembly in this utility model. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the connection structure of the solid filter assembly, liquid drive assembly, and ink filter assembly in this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the structure of the ink filter assembly in this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the polarity tank in this utility model;

[0027] Figure 6 This is a schematic diagram of the solid filter component in this utility model.

[0028] In the diagram, 100 represents the developing tank;

[0029] 200. Solid filter assembly; 210. Filter cartridge; 220. Filter element;

[0030] 300. Liquid-driven assembly; 310. Drive pump;

[0031] 400, Ink filter assembly; 410, Connecting pipe; 411, Connector; 412, Input pipe; 413, Output pipe; 420, First adsorption element; 421, First tank; 422, Adsorption cotton filling layer; 430, Second adsorption element; 431, Second tank; 432, Activated carbon filling layer; 440, Third adsorption element; 441, Third tank; 442, Polar tank; 442a, Central shaft; 442b, Polar plate. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] In existing technologies, PCB etching processes rely on developing solutions to remove photoresist. With continuous use of the developing solution, ink dissolves in the solution, increasing its viscosity. This necessitates frequent shutdowns of the developing tank for cleaning, resulting in wasted solutions and reduced production efficiency. Typically, the developing tank needs to be replaced every six hours, severely impacting continuous operation capabilities.

[0034] To address these issues, researchers discovered that ink contamination comprises various components, including grease, organic matter, and polar molecules, making comprehensive removal difficult with a single filtration method. By analyzing the characteristics of the contaminants, a phased treatment approach was proposed: first, solid impurities are intercepted, then different dissolved contaminants are specifically removed using adsorption materials. Simultaneously, considering ease of maintenance, a modular design was adopted to enable rapid replacement of consumables, avoiding overall system downtime.

[0035] Please see Figures 1 to 6 This application discloses a developer solution circulation filtration device, comprising a developer tank 100, a solid filter assembly 200, a liquid drive assembly 300, and an ink filter assembly 400. The developer tank 100 is used to soak a PCB board to remove photoresist and expose the etched pattern.

[0036] The inlet of the solid filter assembly 200 is connected to the bottom of the developing tank 100, and the outlet is connected to the inlet of the liquid drive assembly 300. When the developing solution passes through the solid filter assembly 200, solid substances in the developing solution can be filtered out.

[0037] The two ends of the liquid driving component 300 are connected to the solid filter component 200 and the ink filter component 400, respectively. The liquid driving component 300 can drive the development solution to flow, providing power for the circulation of the development solution.

[0038] The ink filtration assembly 400 includes a connecting tube 410, a first adsorbent 420, a second adsorbent 430, and a third adsorbent 440. The first adsorbent 420 removes grease from the developing solution, the second adsorbent 430 adsorbs organic matter from the developing solution, and the third adsorbent 440 captures polar molecules from the developing solution, thus achieving the separation of ink and developing solution. The first adsorbent 420, second adsorbent 430, and third adsorbent 440 are detachably connected to the connecting tube 410. Maintenance and repair of these adsorbents do not require interrupting the entire system; only specific faulty components need to be replaced. The connecting tube 410 is connected at both ends to the outlet of the liquid drive assembly 300 and the top of the developing tank 100, respectively. The liquid drive assembly drives the developing solution through the first adsorbent 420, second adsorbent 430, and third adsorbent 440 to separate the ink, and then re-exports the relatively pure developing solution to the developing tank 100, achieving the recycling of the developing solution.

[0039] In the specific implementation process, the chemical solution enters the solid filter assembly 200 from the bottom of the developing tank 100, and the filter element 220 traps solid particles such as metal debris. After purification, the chemical solution is pressurized by the liquid drive assembly 300 and enters the ink filter assembly 400, flowing sequentially through the adsorption cotton, the activated carbon layer, and the polar plate array 442b. The adsorption cotton captures oil particles through the fiber gaps, the activated carbon adsorbs organic solvents through its porous structure, and the polar plates 442b capture charged particles using intermolecular forces. The treated chemical solution returns to the top of the developing tank 100 through the connecting pipe 410, forming a continuous circulation purification process.

[0040] In some embodiments, please refer to Figure 4 The third adsorption element 440 includes a third tank 441 and a polar tank 442 disposed in the third tank 441. The polar tank 442 is arranged in a spiral. The spiral shape can extend the flow path of the developing solution and increase the contact time between the polar molecules and the adsorption surface. The polar tank 442 can adsorb the polar molecules in the developing solution, thereby achieving complete separation of the developing solution and the polar molecules.

[0041] In the specific implementation process, the third tank 441 is a container structure used to accommodate the polar tank 442. It can be made of stainless steel or corrosion-resistant plastic. Its internal space is connected to the connecting pipe 410 to guide the medicine to flow through the polar tank 442.

[0042] Among them, the polar tank 442 is a spiral structure with the function of adsorbing polar molecules. Specifically, it can be formed by combining metal plates coated with ion exchange resin. The polar tank 442 is spiral in shape as a whole.

[0043] For further implementation methods, please refer to Figure 4 and Figure 5The polar tank 442 includes a spirally arranged central axis 442a and polar plates 442b for adsorbing polar molecules. Multiple polar plates 442b are equidistantly arranged around the central axis 442a, and a gap is formed between two polar plates 442b for the development solution to pass through, further increasing the adsorption area and improving the separation efficiency of polar molecules.

[0044] In the specific implementation process, the central axis 442a is a spiral core component that supports the polar plate 442b. Specifically, it can be made into a spiral tubular structure using metal or polymer materials. Its spiral shape can extend the flow path of the developing solution.

[0045] The polar plate 442b is a plate-shaped component with polar molecular adsorption function on its surface. Specifically, it can be made of metal plate or ceramic plate with ion exchange resin coating. The equidistant arrangement of polar plates 442b can increase the contact area with the developing solution.

[0046] The liquid channel formed between adjacent polar plates 442b can be controlled within the range of 0.5-2 mm by adjusting the plate spacing. The narrow gap can slow down the flow rate of the developing solution and prolong the adsorption time.

[0047] When the developing solution containing polar molecules enters the polar tank 442, the solution flows in a spiral direction along the central axis 442a, and is simultaneously divided into multiple fine streams by the equidistantly distributed polar plates 442b. The ion exchange resin on the surface of the polar plates 442b adsorbs the polar molecules in the solution through electrostatic attraction.

[0048] Traditional filtration devices typically use a single adsorption layer or a simple filter screen to treat polar molecules, and the adsorption efficiency is limited by the contact area and residence time. This solution, through a spiral-structured polar tank 442, achieves control of the drug flow rate and maximizes the adsorption area within a limited space, thus solving the problem of drug performance degradation caused by residual polar molecules.

[0049] It should be further explained that the third tank 441 is provided with a spiral orifice, and the polar groove 442 is inserted into the spiral orifice. The spiral orifice is a spiral channel structure formed inside the tank, which can be realized by mold casting or machining. Its spiral shape can extend the flow path of the developing solution and increase the contact time with the adsorbent material. The insertion of the polar groove 442 refers to fixing the groove with the polar plate 442b into the spiral orifice by insertion. This can be achieved by interference fit or positioning slot. This structure facilitates quick disassembly and assembly for maintenance or replacement of the adsorbent components.

[0050] In some embodiments, please refer to Figure 4The second adsorbent 430 includes a second tank 431 and an activated carbon filling layer 431. The activated carbon filling layer 431 is made of activated carbon particles, which are filled in the second tank 431. The activated carbon particles can adsorb organic matter in the developing solution that enters the second tank 431, thus purifying the developing solution.

[0051] In practical implementation, the second tank 431 is a container structure for holding activated carbon particles. It can be made of stainless steel or corrosion-resistant plastic. Its internal space is designed to allow the developer solution to pass through and come into contact with the activated carbon particles. The activated carbon particles are carbon-based adsorbent materials with a porous structure. Specifically, they can be coal-based or wood-based activated carbon with a particle size range of 0.5-3 mm, which achieves physical adsorption of organic matter through its surface pore structure.

[0052] When the developing solution passes through the second tank 431, the organic components in the solution are adsorbed and retained by the activated carbon particles, thereby reducing the viscosity of the solution. Since the packing density and contact area of ​​the activated carbon particles can be adjusted according to needs, such as by controlling the particle layer thickness or particle size distribution, it can adapt to different concentrations of organic contamination. The connection between the tank and the circulation pipeline allows for convenient replacement of the activated carbon particles after adsorption saturation, avoiding frequent shutdowns due to decreased adsorption efficiency.

[0053] Traditional solutions typically employ a single filtration structure or lack specific adsorption treatment for organic matter, resulting in ineffective mitigation of the viscosity problem in the developing solution. This solution introduces a second tank 431 filled with activated carbon particles, which directly targets and adsorbs organic matter in the developing solution, significantly extending the solution's lifespan. Simultaneously, the tank structure simplifies maintenance procedures.

[0054] In some embodiments, please refer to Figure 4 The third adsorption element 440 includes a first tank 421 and an adsorption cotton filling layer 422. The adsorption cotton filling layer 422 is grease adsorption cotton. The adsorption cotton is filled in the first tank 421. The adsorption cotton can adsorb the grease in the developing solution that enters the first tank 421 and purify the developing solution.

[0055] In the specific implementation process, the first tank 421 is a container for holding the adsorbent material, which can be made of stainless steel or corrosion-resistant plastic. Its internal space is designed to be filled with adsorbent cotton. The adsorbent cotton is a porous fibrous material, which can be made of polyester fiber cotton or composite polymer material, and captures the oil components in the developing solution through physical adsorption.

[0056] During the development solution circulation process, the solution containing oily impurities flows in from the inlet 421 of the first tank. When it passes through the absorbent cotton layer filled inside the tank, the oily components in the solution are trapped by the porous structure of the absorbent cotton.

[0057] In some embodiments, please refer to Figures 1 to 4 The connecting tube body 410 includes multiple connectors 411, an input tube 412, and an output tube 413. The middle portions of the input tube 412 and the output tube 413 are respectively sealed to the connectors 411. The distance between the end of the input tube 412 and the connector 411 is longer than the distance between the output tube 413 and the connector 411. There is a difference in distance between the input tube 412 and the output tube 413 along the radial and axial directions of the tank, which can increase the utilization rate of the filler material located between the input tube 412 and the output tube 413. Only an activated carbon filling layer 432 or an absorbent cotton filling layer 422 can reach the input tube 412, thereby achieving the filtration and purification of the developing solution.

[0058] The first adsorption element 420, the second adsorption element 430, and the third adsorption element 440 are detachably connected to a connector 411, which facilitates the maintenance and replacement of the failed first adsorption element 420, the second adsorption element 430, and the third adsorption element 440.

[0059] In the specific implementation process, the connector 411 is an interface component used to realize the detachable connection between the pipeline and the adsorption component. Specifically, it can be implemented by a threaded joint with a sealing ring to ensure that no leakage occurs during fluid transmission.

[0060] The first adsorption component 420, the second adsorption component 430, and the third adsorption component 440 are connected to the connector 411 via snap-fit ​​connections, threaded connections, or quick-connect couplings. Snap-fit ​​connections utilize an elastic snap-fit ​​structure to fix the components together; specifically, a mating structure with protrusions and grooves can be used, and installation and removal are completed by pressing or rotating. Threaded connections achieve sealing and fixation through the engagement of internal and external threads; specifically, a standard threaded interface with a sealing ring can be used, and the tightness of the connection is controlled by rotation. Quick-connect couplings achieve rapid docking through a pre-set locking mechanism; specifically, a one-way valve structure with a spring lock can be used, and the fluid channel is opened and closed by inserting or pulling. For example, when the activated carbon particles are saturated, the second adsorption component 430 can be removed from the connector 411 by rotating the threaded interface, replaced with a new component, and then tightened again to restore system operation.

[0061] After the developing solution enters the connector 411 from the input pipe 412, it needs to flow through the adsorption component for adsorption treatment of grease, organic matter and polar molecules. Then it returns to the developing tank 100 through the output pipe 413. The adsorption component is connected to the connector 411 in a detachable manner, and can be directly disassembled and replaced during operation without interrupting the entire circulation system.

[0062] Traditional filtration devices typically use fixed piping connections for their adsorption components, requiring system shutdown and disassembly of the entire pipeline for maintenance, resulting in low efficiency. This solution utilizes a modular connector 411 design to separate the adsorption components from the piping, allowing for replacement of only a single component and significantly reducing maintenance time.

[0063] In some embodiments, please refer to Figure 6 The solid filtration assembly 200 includes a filter cartridge 210 and a filter element 220. The filter element 220 is movably installed in the filter cartridge 210. The bottom of the filter cartridge 210 is connected to the bottom of the developing tank 100 through a pipe, and the top of the filter cartridge 210 is connected to the liquid drive assembly 300 through a pipe. The filter element 210 can filter solid impurities in the developing solution and purify the developing solution.

[0064] In practical implementation, the filter cartridge 210 serves as a container for holding the filter element 220. It can be made of corrosion-resistant metal or plastic. Its bottom connects to the developing tank 100 to receive the solution containing solid impurities, and its top connects to the liquid drive assembly 300 to output the filtered solution. The filter element 220 is the filter medium used to intercept solid impurities. It can be implemented using multi-layer filter screens or sintered filter media. The removable installation method allows the filter element 220 to be removed from the filter cartridge 210 for cleaning or replacement. This means that the filter element 220 and the filter cartridge 210 are detachably connected via a slot, thread, or flange structure, facilitating filter element replacement.

[0065] As the solution containing solid impurities at the bottom of the developing tank 100 enters the filter cartridge 210 through the pipe, the solid matter is intercepted when it flows through the filter element 220. The filtered solution flows out from the top of the filter cartridge 210 and enters the liquid drive assembly 300. After long-term use, the filter element 220 can be quickly disassembled through the movable mounting structure to avoid a decrease in filtration efficiency due to solid accumulation. The pipe connection between the filter cartridge 210 and the liquid drive assembly 300 ensures that the filtered solution can be pumped to the subsequent ink filter assembly 400, forming a circulating flow.

[0066] In some embodiments, the liquid driving assembly 300 includes a driving pump 310, which is connected to the filter cartridge 210 and the ink filter assembly 400 via pipes. The driving pump 310 can drive the developer solution that has passed through solid filtration to circulate, providing power for the flow of the developer solution.

[0067] In practical implementation, the drive pump 310 is a device that drives the flow of liquid through mechanical power. Specifically, it can be a centrifugal pump or a gear pump. Its function is to provide continuous power for the circulation of developing solution.

[0068] When the drive pump 310 operates intermittently, its inlet is connected to the outlet of the filter cartridge 210 via a pipe, and its outlet is connected to the inlet of the ink filter assembly 400 via a pipe. After the drive pump 310 starts, the developing solution enters the solids filter assembly 200 from the bottom of the developing tank 100. After solid impurities are removed by the filter element 220, it flows into the drive pump 310 and is then pumped to the ink filter assembly 400 for adsorption of grease, organic matter, and polar molecules. Finally, it flows back to the top of the developing tank 100 through the connecting pipe 410. Through the continuous operation of the drive pump 310, the developing solution circulates in a closed system, preventing viscosity increases due to ink accumulation.

[0069] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A developer solution circulation and filtration device, comprising a developing tank for storing developer solution, characterized in that, It also includes a solid filter assembly, a liquid drive assembly, and an ink filter assembly connected in sequence; One end of the solid filter assembly is connected to the bottom of the developing tank to filter solid substances from the developing solution; The two ends of the liquid driving component are respectively connected to the solid filter component and the ink filter component to drive the developer solution to circulate. The ink filtration assembly includes a connecting tube, a first adsorbent for adsorbing grease, a second adsorbent for adsorbing organic matter, and a third adsorbent for adsorbing polar molecules. The two ends of the connecting tube are respectively connected to the top of the liquid driving assembly and the developing tank. The first adsorbent, the second adsorbent, and the third adsorbent are detachably connected to the connecting tube.

2. The developer solution circulation filtration device according to claim 1, characterized in that, The third adsorption element includes a third tank and a polar tank disposed in the third tank. The polar tank is arranged in a spiral configuration and is capable of adsorbing polar molecules in the developing solution.

3. The developer solution circulation filtration device according to claim 2, characterized in that, The polar tank includes a spirally arranged central axis and polar plates for adsorbing polar molecules. Multiple polar plates are equidistantly arranged around the central axis, and a gap is formed between two polar plates for the development solution to pass through.

4. The developer solution circulation filtration device according to claim 3, characterized in that, The tank body is provided with a spiral hole, and the polar groove is inserted into the spiral hole.

5. A developer solution circulation filtration device according to claim 1, characterized in that, The second adsorbent includes a second tank and an activated carbon filling layer for adsorbing organic matter, wherein the activated carbon filling layer is filled in the second tank.

6. The developer solution circulation filtration device according to claim 1, characterized in that, The third adsorption element includes a first tank and an adsorption cotton filling layer for adsorbing grease, wherein the adsorption cotton filling layer is filled in the first tank.

7. A developer solution circulation filtration device according to any one of claims 1-6, characterized in that, The connecting tube body includes multiple connectors, an input tube, and an output tube. The middle portions of the input tube and the output tube are respectively sealed to the connectors. The distance between the end of the input tube and the connector is longer than the distance between the output tube and the connector. The first adsorption element, the second adsorption element, and the third adsorption element are detachably connected to the connectors.

8. A developer solution circulation filtration device according to claim 7, characterized in that, The first, second, and third adsorption components are connected to the connector via snap-fit, threaded connection, or quick-connect coupling.

9. A developer solution circulation filtration device according to claim 1, characterized in that, The solid filtration assembly includes a filter cartridge and a filter element. The filter element is movably installed in the filter cartridge. The bottom of the filter cartridge is connected to the bottom of the developing tank through a pipe, and the top of the filter cartridge is connected to the liquid driving assembly through a pipe.

10. A developer solution circulation filtration device according to claim 9, characterized in that, The liquid drive assembly includes a drive pump, which is connected to the filter cartridge and the ink filter assembly via pipes.

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