A high-voltage film removal device for circuit boards

Abstract

The present invention provides a high-pressure defilming device for circuit boards, including a frame, a fixture, a defilming module, a filter module 1, and a filter module 2. The frame includes a bottom frame and an upper frame arranged above the bottom frame, a reaction tank is arranged inside the upper frame, and a medicine water tank is arranged inside the bottom frame. The fixture moves in a vertical state in the reaction tank through a conveying mechanism. The defilming module is arranged in the reaction tank, including two spray discs symmetrically arranged on both sides of the fixture with the fixture as the center; the filter module 1 is used for coarse filtration of the suspension, and the filter module 2 finely filters the suspension through multiple filtrations; the defilming liquid after filtration and purification is connected to the defilming module, and the medicine water tank, the filter module 1, the filter module 2 and the defilming module form a filtering circulation system for the defilming liquid. The present invention uses inclined spraying to remove the membrane, and the defilming is clean and thorough; and the defilming module is integrated with the filtering device, so as to realize the recycling of the defilming liquid, save resources, and is suitable for defilming of various circuit boards, with a wide range of uses.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board manufacturing, and in particular to a high-voltage film removal device for a circuit board. Background Art

[0002] The production of circuit boards usually adopts the process of substrate dry film → exposure → development → etching → film removal. Among them, film removal is one of the core processes of the circuit board wet process. Its working principle is to use a special film removal liquid to remove the film layer (etching resist layer) that protects the copper surface to reveal the circuit pattern. The film removal liquid chemically reacts with the exposed film layer on the circuit board surface to make it fall off, and the fallen film residue is mixed with the film removal liquid to form a suspension.

[0003] With the development of PCB industry, the impedance requirements of various conductors are getting higher and higher, which inevitably requires stricter control of conductor width. The nozzle of the current film removal device generally sprays the liquid vertically to the circuit board, which will cause the dead corners of the circuit board or the positions with small line width and line spacing to be not cleaned thoroughly, resulting in the problem of slag inclusion.

[0004] In addition, in order to recycle and reuse the film stripping liquid, a filtering device is required to filter and remove the film residue in the film stripping liquid. Existing film stripping equipment generally has a filtering device to filter the suspension, and the mixed film stripping liquid needs to be transported to the filtering device. The transportation is troublesome and easily causes the loss of the film stripping liquid, which reduces the recovery rate of the film stripping liquid, increases the purchase cost of the film stripping liquid and the equipment cost, and thus increases the manufacturing cost of the circuit board.

[0005] In addition, traditional filtration methods mostly use bag-type, cotton core or filter-type filtration, which are complex in structure and high in cost. Moreover, due to the large amount of filter residue in the membrane removal, the traditional filtration method has limited filtration capacity and slow filtration speed. It needs frequent maintenance and replacement of filter elements, etc. The maintenance frequency is high, otherwise it will be blocked by membrane residue and cannot be used. Maintenance requires downtime, which affects production efficiency. In addition, the membrane removal liquid is toxic, and manual maintenance increases the possibility of work-related injuries. Moreover, when filtering, only one filtration method is used, and the filtration effect is not ideal. The filtered membrane removal liquid is not pure enough, which affects the membrane removal effect and is not suitable for the membrane removal of fine circuit boards. Summary of the invention

[0006] The present invention aims to provide a high-voltage film removal device for a circuit board to overcome the deficiencies in the prior art.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a high-pressure defilming equipment for circuit boards, including a frame, a clamp, a defilming module, a filter module 1, and a filter module 2. The frame includes a base frame and an upper frame arranged above the base frame. A reaction tank for defilming is arranged inside the upper frame. A medicine water tank is arranged below the reaction tank inside the base frame. A circuit board is loaded on the clamp and moves in a vertical state in the reaction tank through a conveying mechanism. The defilming module is arranged in the reaction tank, including two spray discs symmetrically arranged on both sides of the clamp with the clamp as the center; the filter module 1 is arranged in the medicine water tank for coarse filtering of the suspension entering the medicine water tank, and the filter module 2 is arranged on one side of the medicine water tank for fine filtering of the suspension through multiple filtrations; the defilming liquid after multiple filtrations and purification is connected to the liquid inlet pipeline of the defilming module, and the medicine water tank, the filter module 1, the filter module 2 and the defilming module constitute a filtering circulation system for the defilming liquid.

[0008] Furthermore, in the above-mentioned high-pressure defilming equipment for circuit boards, the spray plate includes a plurality of nozzles evenly arranged along the conveying direction of the fixture, the nozzles are vertically arranged, the nozzles are arranged parallel to the circuit board on the fixture, and a plurality of evenly arranged nozzles are provided along the vertical direction, the nozzles are inclined to the nozzles, and the spraying angle of the nozzles is 10-20°.

[0009] Furthermore, in the above-mentioned high-pressure film removal equipment for circuit boards, the nozzles on adjacent nozzles are staggered in the vertical direction; and the inclination directions of the nozzles on adjacent nozzles are staggered.

[0010] Furthermore, in the above-mentioned high-pressure defilming equipment for circuit boards, the spray plate also includes a diverter pipe and a support plate. The spray plate is fixed in the upper frame through the diverter pipe and the support plate. A liquid inlet 1 is provided at the bottom of the diverter pipe. The liquid inlet 1 is connected to the filter module 2 through a water inlet pipeline. A plurality of the spray pipes are fixed above the diverter pipe. The support plate is arranged parallel to the diverter pipe and is used to support the upper end of the spray pipe.

[0011] Furthermore, in the above-mentioned high-pressure defilming equipment for the circuit board, the filtering module 1 includes a vibrating plate, a filter screen, a scraping mechanism, and a slag receiving box. The vibrating plate is arranged in the middle and upper part of the medicine water tank, and a filter screen is arranged thereon. The scraping mechanism is arranged above the vibrating plate, including an annular conveyor chain, and a plurality of evenly arranged scraping brushes are arranged on the annular conveyor chain. The scraping brush located at the bottom of the annular conveyor chain abuts against the filter screen; a liquid inlet 2 is arranged at one end of the top of the medicine water tank, and a slag receiving box connected to the medicine water tank is arranged on the outside of the other end, and the slag dropping end of the vibrating plate is connected to the slag receiving box.

[0012] Furthermore, in the above-mentioned high-pressure defilming equipment for circuit boards, the vibration plate includes a tray, a shock-absorbing spring, a bracket, and a vibrator. The tray is an open frame structure, and its top, bottom and one side close to the slag box are all open. The filter is arranged at the opening on the bottom surface of the tray, and shock-absorbing springs are arranged at the four corners of the bottom of the tray. The shock-absorbing springs are connected to the medicine tank through a fixed seat. A bracket is provided at one end of the tray close to the slag box, and the bracket is a door-type arch frame, and its lower end is connected to the outside of the tray on both sides, and its upper end extends to the outside of the medicine tank. The vibrator is fixed in the middle position of the horizontal plate on the top of the bracket.

[0013] Furthermore, in the above-mentioned high-pressure film removal equipment for the circuit board, a plurality of evenly arranged heating tubes and cooling tubes are provided at the lower end of the interior of the medicine box, wherein the heating tubes are spiral-shaped, and the cooling tubes are arranged one by one corresponding to the heating tubes and inserted inside the heating tubes.

[0014] Furthermore, in the above-mentioned high-pressure demembraning equipment for circuit boards, the filter module 2 is arranged on a fixed frame, and includes a magnetic pump 1 and a centrifugal cylinder. The magnetic pump 1 is connected to a drug extraction pipe arranged at the lower end of the drug tank, and the centrifugal cylinder is connected to the outlet of the magnetic pump 1 through a pipeline, and is used for centrifugally separating the membrane residue and the demembraning liquid in the suspension; the centrifugal cylinder includes a cylinder body, a liquid inlet pipe, a drain pipe, and a slag discharge port. The cylinder body includes a cylindrical upper cylinder body and a conical lower cylinder body. The liquid inlet pipe is arranged at the upper end of the upper cylinder body, and the liquid outlet of the liquid inlet pipe extends into the interior of the upper cylinder body and is tangentially arranged along the inner circumferential wall of the upper cylinder body. The drain pipe is arranged at the top of the upper cylinder body, and its lower end is provided with an extended convex pipe extending to the interior of the upper cylinder body and crossing the liquid outlet of the liquid inlet pipe. The slag discharge port is arranged at the bottom of the lower cylinder body, and a joint for connecting the slag discharge pipe is provided on the slag discharge port; the slag discharge pipe discharges the membrane residue discharged from the centrifugal cylinder to the top of the filter screen.

[0015] Furthermore, in the above-mentioned high-pressure membrane removal equipment for circuit boards, there are multiple centrifugal cylinders, which are connected in series along the flow direction of the chemical solution.

[0016] Furthermore, in the above-mentioned high-pressure membrane removal equipment for the circuit board, the filtration module 2 also includes a temporary storage tank arranged downstream of the centrifugal cylinder, the temporary storage tank is connected to the drain pipe of the centrifugal cylinder through a pipeline, and is used to precipitate the liquid discharged from the centrifugal cylinder, the upper end of the temporary storage tank is provided with an overflow port, and the overflow port is connected to the lower end of the medicine tank through a pipeline; the lower end of the temporary storage tank is provided with a liquid outlet, and a magnetic pump 2 is provided on the connecting pipeline of the liquid outlet.

[0017] Furthermore, in the above-mentioned high-pressure demembrane equipment for the circuit board, the filter module 2 also includes at least two cotton core filters, multiple cotton core filters are connected in parallel, and one of the cotton core filters is a redundant filter for backup, the inlet at the bottom of the cotton core filter is connected to the liquid extraction port at the lower end of the temporary storage tank through a pipe, and the outlet at the upper end of the cotton core filter is connected to the demembrane module on the demembrane equipment through a pipe.

[0018] Furthermore, in the above-mentioned high-pressure defilming equipment for the circuit board, an air valve is provided on the inlet pipe of each cotton core filter, and a pressure gauge and an electric valve are also provided on the outlet pipe of each cotton core filter.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The vertical film stripping method can solve the problem of uneven and incomplete film stripping in horizontal film stripping. The nozzle is tilted and does not spray vertically on the circuit board. The etching resist layer in the dead corner of the circuit board or the position with small line width and line spacing can be removed to avoid slag inclusion and ensure clean and thorough film stripping.

[0021] 2. Use a centrifugal drum for preliminary filtration, and use a temporary storage tank to precipitate the membrane removal liquid filtered by the centrifugal drum. The centrifugal drum has a large filtration capacity and a fast filtration speed. There is no filter screen inside, no need for driving, and no parts that need to be disassembled for maintenance. It has a simple structure, is easy to operate, and is basically maintenance-free, which improves the filtration efficiency and operational safety. Use multiple cotton core filters for fine filtration, and the number of cotton core filters to be used can be freely switched according to the pressure flow, and the cotton core can be replaced and repaired without stopping work. The operation is simple and convenient. Use a centrifugal drum, a temporary storage tank, and a cotton core filter for fine filtration, with good filtration effect and high filtration efficiency. It can not only adapt to conventional circuit board membrane removal, but also to fine circuit board membrane removal, and has a wide range of adaptability.

[0022] 3. The membrane removal module is integrated with the filtration device, and the overall structure is compact, which is convenient for recovering the medicine, avoiding the loss of membrane removal solution, saving resources and reducing costs;

[0023] 4. Through the combination of multi-stage filtration, the recycling of the defilming liquid is realized, which saves resources, and the filtration of the defilming liquid achieves the best effect. It can be suitable for the defilming of various circuit boards and has a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The structure of the high-voltage film removal device of the circuit board of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 2 The structure of the high-voltage film removal device of the circuit board of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 3 It is a schematic diagram of the internal structure of the high-voltage film removal device for the circuit board of the present invention;

[0028] Figure 4 for Figure 3 Side view of

[0029] Figure 5 It is a schematic diagram of a film stripping module of a high-voltage film stripping device for a circuit board of the present invention;

[0030] Figure 6 A front view of a spray plate of a high-pressure film removal device for a circuit board of the present invention;

[0031] Figure 7 A side view of a spray plate of a high-pressure film removal device for a circuit board of the present invention;

[0032] Figure 8 Schematic diagram of the connection between the filter module 1 and the filter module 2 of the high-pressure membrane removal device of the circuit board of the present invention Figure 1 ;

[0033] Fig. 9 Schematic diagram of the connection between the filter module 1 and the filter module 2 of the high-pressure membrane removal device of the circuit board of the present invention Figure 2 ;

[0034] Fig.10 This is a schematic diagram of the external structure of the medicine box of the high-pressure film removal equipment of the circuit board of the present invention;

[0035] Fig.11 The internal structure of the filter module of the high-pressure membrane removal device of the circuit board of the present invention is shown in FIG. Figure 1 ;

[0036] Fig.12 The internal structure of the filter module of the high-pressure membrane removal device of the circuit board of the present invention is shown in FIG. Figure 2 ;

[0037] Fig.13 A schematic diagram of a scraping mechanism and a vibrating plate of a high-pressure film removal device for a circuit board of the present invention;

[0038] Fig.14 The structure diagram of the second filter module of the high-pressure membrane removal device of the circuit board of the present invention is shown in FIG. Figure 1 ;

[0039] Fig.15 The structure diagram of the second filter module of the high-pressure membrane removal device of the circuit board of the present invention is shown in FIG. Figure 2 ;

[0040] Fig.16 It is a structural schematic diagram of a centrifugal cylinder of a high-pressure film removal device for a circuit board of the present invention;

[0041] Fig.17 The filtering principle diagram of the third embodiment of the high-pressure film removal device for the circuit board of the present invention;

[0042] Fig.18 The filtering principle diagram of the fourth embodiment of the high-pressure film removal device for the circuit board of the present invention;

[0043] Fig.19 The filtering principle diagram of the fifth embodiment of the high-pressure film removal device for circuit boards of the present invention;

[0044] In the figure: 100, filtering module 1; 200, filtering module 2; 300, membrane removal module;

[0045] 1. Rack; 101. Base frame; 102. Upper frame; 103. Reaction tank;

[0046] 2. Fixture;

[0047] 3. Spray plate; 31. Spray pipe; 32. Nozzle; 33. Diverter pipe; 331. Liquid inlet 1; 34. Support plate; 35. Quick-release connector; 36. Plug;

[0048] 4. Conveying mechanism; 41. Transmission assembly; 411. Transmission seat; 412. Transmission shaft; 413. Driven shaft; 414. Magnetic wheel 1; 415. Magnetic wheel 2; 416. Roller; 42. Guide assembly; 421. Guide seat plate; 422. Upper guide wheel;

[0049] 5. Chemical solution tank; 501. Second liquid inlet; 502. Water receiving box; 503. Observation window;

[0050] 6. Vibration plate; 61. Tray; 62. Shock-absorbing spring; 63. Bracket; 64. Vibrator;

[0051] 7. Filter;

[0052] 8. scraper mechanism; 81. scraper brush; 82. motor; 83. main sprocket; 84. slave sprocket; 85. chain 1; 86. driving shaft; 87. driven shaft; 88. chain 2;

[0053] 9. Slag receiving box; 91. Material guide hopper; 92. Cover plate;

[0054] 10. Heating pipe; 11. Cooling pipe; 12. Connector 1; 13. Connector 2;

[0055] 14. Fixed frame;

[0056] 15. Magnetic pump 1; 16. Centrifugal cylinder; 161. Cylinder body; 162. Liquid inlet pipe; 163. Drain pipe; 1631. Extended convex pipe; 164. Slag discharge port; 165. Joint; 166. Slag discharge pipe;

[0057] 17. Temporary storage tank; 18. Cotton core filter; 19. Magnetic pump 2; 20. Air valve; 21. Pressure gauge; 12. Electric valve. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Example 1

[0060] like Figure 1-19 As shown, a high-pressure film removal device for circuit boards includes a frame 1, a fixture 2, a film removal module 300, a filter module 1 100, and a filter module 2 200. The frame 1 includes a bottom frame 101 and an upper frame 102 arranged above the bottom frame 101. A reaction tank 103 for film removal is arranged inside the upper frame 102. A switch door is arranged at the front and rear sides of the upper frame 102, and an observation window is arranged on the door. A medicine box 5 is arranged below the reaction tank 103 inside the bottom frame 101. The circuit board is loaded on the fixture 2, and is vertically conveyed in the reaction tank 103 by a conveying mechanism 4. The state moves, the defilming module 300 is arranged in the reaction tank 103, including two spray plates 3 symmetrically arranged on both sides of the clamp with the clamp 2 as the center; the filtering module 1 100 is arranged in the medicine tank 5, and is used for coarse filtering of the suspension entering the medicine tank 5, and the filtering module 2 200 is arranged on one side of the medicine tank 5, and finely filters the suspension through multiple filtrations; the defilming liquid after multiple filtrations and purification is connected to the liquid inlet pipeline of the defilming module 300, and the medicine tank 5, the filtering module 1 100, the filtering module 2 200 and the defilming module 300 constitute a filtering circulation system for the defilming liquid. During defilming, the defilming liquid (suspension) carrying the membrane residue after the reaction in the reaction tank 103 falls from the reaction tank 103 into the medicine box 5 below, and then enters the spray plate 3 through the water inlet pipe for spraying for defilming after being filtered by the filter module 1 100 and the filter module 2 200, and the defilming liquid is recycled and reused to form a circulation system for the defilming liquid. The present invention also integrates the defilming module 300 with the filtering device, and the overall structure is compact, which is convenient for recovering the medicine, avoiding the loss of the defilming liquid, saving resources, and reducing costs. Moreover, through the combined filtration of multi-stage filtration methods, the defilming liquid has a high degree of purity and achieves the best filtration effect. It is suitable for defilming of various circuit boards (including fine circuit boards) and has a wide range of uses.

[0061] like Figure 5-7As shown, the spray plate 3 includes a plurality of spray pipes 31 evenly arranged along the conveying direction of the fixture 2, the spray pipes 31 are vertically arranged, the spray pipes 31 are parallel to the circuit board on the fixture 2, and a plurality of evenly arranged nozzles 32 are provided along the vertical direction, the nozzles 32 are tilted to the spray pipes 31, that is, the nozzles 312 do not spray vertically on the circuit board, and the spray angle (the angle between the center axis of the nozzle and the horizontal direction) A of the nozzles 32 is 10-20°, that is, the angle B between the nozzles 312 and the spray pipes 311 is 70-80°. The vertical film removal method can solve the problem of uneven and incomplete film removal in horizontal film removal, and the nozzles 32 are tilted and not sprayed vertically on the circuit board, which can remove the etching resist layer at the dead corner of the circuit board or the position with small line width and line spacing, avoid slag inclusion, and ensure clean and thorough film removal.

[0062] like Figure 5-7 As shown, the nozzles 32 on adjacent nozzles 31 are staggered in the vertical direction, and the liquid medicine sprayed from the nozzles 32 is fan-shaped, which fully covers the circuit board on the fixture 2. The inclination directions of the nozzles 32 on adjacent nozzles 31 are staggered. Specifically, the nozzles 32 of a nozzle 31 are all tilted upward, and the nozzles 32 on the adjacent nozzles 31 are all tilted downward at the same inclination angle. Through this arrangement, the spraying is in the shape of two vertically staggered fans, and the spraying range is wider, further ensuring that the etching resist layer at the dead corner of the circuit board or the position with small line width and line spacing is completely removed.

[0063] like Figure 4-7 As shown, the spray disc 3 also includes a shunt pipe 33 and a support plate 34. The spray disc 3 is fixed in the upper frame 102 through the shunt pipe 33 and the support plate 34. The shunt pipe 33 is provided with a liquid inlet 331 at the bottom. The liquid inlet 331 is connected to the filter module 2 200 through the water inlet pipeline. A plurality of the spray pipes 31 are fixed above the shunt pipe 33. The support plate 34 is arranged above the shunt pipe 33 in parallel to support the upper end of the spray pipe 31 and improve the stability of the spray disc 3. The flow rate and spray pressure of the medicine of a spray disc 3 can be controlled by the shunt pipe 33. A quick-release joint 35 is provided at the bottom of the spray pipe 31, and is connected to the flow channel arranged inside the shunt pipe 33 through the quick-release joint 35; the support plate 34 is provided with a through hole corresponding to the spray pipe 31, and a plug 36 is provided at the top of the spray pipe 31. The plug 36 is inserted into the through hole and extends to the top of the support plate 34. The nozzle 31 can be quickly installed through the quick-release joint 35 and the plug 36, and the structure is simple and the installation is convenient.

[0064] like Figure 3-4As shown, the conveying mechanism 4 is used to vertically convey the fixture 2, including a transmission assembly 41 arranged at the bottom of the upper frame 102, and the transmission assembly 41 is used to drive the fixture 2 to move along the conveying direction, including a transmission seat 411, a transmission shaft 412, a driven shaft 413, a magnetic wheel 1 414, and a magnetic wheel 2 415. The transmission shaft 412 is arranged along the conveying direction and is arranged parallel to the outside of the transmission seat 411. The transmission shaft 412 is connected to the servo motor (not shown in the figure) through a coupling. The driven shaft 413 is provided with a plurality of driven shafts 413, which are arranged inside the transmission seat 411. The driven shaft 413 is rotatably connected to the transmission seat 411. A magnetic wheel 2 415 is fixed to one end of each driven shaft 413 extending out of the transmission seat 411. The transmission shaft 412 is provided with a plurality of magnetic wheels 1 414 corresponding to the magnetic wheels 2 415. The magnetic wheels 1 414 cooperate with the magnetic wheels 2 415. Each driven shaft 413 is also provided with a roller 416 located inside the transmission seat 411. The bottom of the clamp 2 is connected to the roller 416. The outer side of the roller 416 is also provided with a guide groove that cooperates with the clamp 2 to ensure the stability of movement. In addition, Figure 2-3 As shown, the conveying mechanism 4 further includes a guide assembly 42 on the top of the upper frame 12, the guide assembly 42 includes a guide seat plate 421 and an upper guide wheel 422. The guide seat plate 421 is a U-shaped groove plate arranged along the conveying direction, and a plurality of groups of upper guide wheels 422 arranged in parallel are arranged in pairs on both sides of the bottom thereof, and the upper end of the clamp 2 passes between the upper guide wheels 422 arranged in pairs. The guide assembly 42 can guide the movement of the clamp 2 and prevent the upper end of the clamp 2 from swinging during the movement of the clamp 2.

[0065] During transportation, the servo motor drives the transmission shaft 412 to drive the magnetic wheel 1 414 to rotate, and the magnetic wheel 1 414 drives the magnetic wheel 2 415 matched therewith to rotate, so that the driven shaft 413 and the roller 416 arranged on the driven shaft 413 rotate, and the rotation of the multiple rollers 416 drives the clamp 2 to move, the structure is simple and compact, and the transportation is stable. During the spraying and film removal process, the conveying mechanism 4 keeps working, and the reaction time of the liquid medicine is controlled by controlling the conveying speed, thereby improving the production efficiency.

[0066] In addition, if Figure 2-3 As shown, the upper rack 102 is also provided with a cavity located at the rear side of the reaction tank 103 for the unloaded fixture 2 to rotate, and the cavity is also provided with a conveying mechanism 4. This arrangement allows the fixture 2 to circulate on the production line of the circuit board, with a high degree of automation and can improve the utilization rate of the fixture.

[0067] Example 2

[0068] Based on the structure of Example 1, Figure 8-13As shown, the filtration module 100 includes a vibration plate 6, a filter screen 7, a scraping mechanism 8, and a residue receiving box 9. The vibration plate 6 is arranged in the middle and upper part of the medicine box 5, and a filter screen 7 is arranged thereon. The scraping mechanism 8 is arranged above the vibration plate 6, and includes an annular conveying chain. A plurality of evenly arranged scraping brushes 81 are arranged on the annular conveying chain. The scraping brush 81 located at the bottom of the annular conveying chain abuts against the filter screen 7. The above-mentioned annular conveyor chain includes a motor 82, a main sprocket 83, a slave sprocket 84, a chain 1 85, a driving shaft 86, a driven shaft 87, and a chain 2 88. The motor 82 is fixed to the outside of the medicine box 5 through a motor seat, and its output end is provided with a main sprocket 83, and the main sprocket 83 is connected to the slave sprocket 84 provided on the driving shaft 86 through a chain 1 84. The chain 2 88 is provided with two, which are respectively wound around the two ends of the driving shaft 86 and the driven shaft 87. The driving shaft 86 and the driven shaft 87 are connected to the medicine box 5 through a bearing seat, and the two ends of the scraper 81 are respectively fixed on the two chains 2 88. When the motor 82 is started, the scraper 81 located at the bottom of the chain 2 88 scrapes the surface of the filter screen 7, and under the drive of the scraper mechanism, the film residue on the surface of the filter screen 7 is brought into the residue receiving box 9, so as to avoid the film residue from accumulating on the filter screen, blocking the filter screen and affecting the filtering effect, and can reduce the cleaning and maintenance of the filter screen.

[0069] like Figure 10-12 As shown, a second liquid inlet 501 connected to the reaction tank 103 is provided at one end of the top of the medicine water tank 5, and a water receiving box 502 located inside the medicine water tank 5 is provided below the second liquid inlet 501. The bottom surface of the water receiving box 502 is inclined, and a serrated water outlet groove is provided at the inclined lower end of the bottom surface. The water receiving box 502 plays a role in buffering the water flow and reducing the impact of the water flow on the filter 7; a slag receiving box 9 connected to the medicine water tank 5 is provided on the outside of the other end of the medicine water tank 5, and the slag dropping end of the vibration plate 6 is connected to the slag receiving box 9. The slag receiving box 9 is attached to the outside of the medicine box 5 and seals the connection opening between the slag receiving box 9 and the medicine box 5. A guide hopper 91 extending to the inside of the medicine box 5 is provided on the side of the slag receiving box 9 close to the medicine box 5. The guide hopper 91 extends obliquely from the bottom of the slag dropping end of the vibration plate 6 to the inside of the slag receiving box 9, and is used to receive the film slag dropped from the vibration plate 6. A cover plate 92 is also provided on the top of the slag receiving box 9, and a slag discharge port is provided at the bottom of the slag receiving box 9. A handle is provided on the top of the cover plate 92. The film slag is discharged from the bottom of the slag receiving box 9 to the slag extruder, and then the film is squeezed dry by the slag extruder, and the medicine is squeezed back into the medicine box 5 for secondary recycling; in addition, the cover plate 92 can be opened for easy maintenance and cleaning. In addition, a transparent observation window 503 is also provided on the side of the top of the medicine box 5 close to the slag receiving box 9. The observation window 503 is specifically located above the guide hopper 91, which is convenient for observing the collection of film slag.

[0070] In the above structure, if Fig.11 , 13As shown, the vibration plate 6 includes a tray 61, a shock-absorbing spring 62, a bracket 63, and a vibrator 64. The tray 61 is an open frame structure, and its top, bottom, and one side close to the slag box 9 are all open. The filter screen 7 is arranged at the bottom opening of the tray 61. Shock-absorbing springs 62 are arranged at the four corners of the bottom of the tray 61. The shock-absorbing spring 62 is connected to the medicine box 5 through a fixed seat. A bracket 63 is arranged at one end of the tray 61 close to the slag box 9. The bracket 63 is a door-shaped arch frame, and its lower ends are connected to the outside of the tray 61 on both sides, and its upper end extends to the outside of the medicine box 5. The vibrator 64 is fixed in the middle of the horizontal plate at the top of the bracket 63, and is located outside the medicine box 5, with low noise. Good vibration performance is achieved through the cooperation of the vibrator 64 and the shock-absorbing spring 62, so that the film residue on the filter screen 7 can fall more smoothly to the slag box 9, avoiding the problem of slag clamping in the corners, and the structure is simple, the space occupied is small, the filtering speed is fast, and the filtering effect is good.

[0071] In addition, if Figure 10-12 As shown, the lower end of the medicine box 5 is also provided with a plurality of uniformly arranged heating tubes 10 and cooling tubes 11. The heating tubes 10 are spiral-shaped, and the cooling tubes 11 are arranged one-to-one with the heating tubes 10 and inserted inside the heating tubes 10. The temperature of the film removal liquid is accurately controlled by the heating tubes 10 and the cooling tubes 11 to ensure the film removal effect. Figure 2 , 3 As shown, the two sides of the medicine box 5 are provided with holes for the number of not less than the heating tubes 10, the heating tubes 10 are fixed to the holes on one side of the medicine box 5 through the joint 12, and the cooling tubes 11 are fixed to the holes on the other side of the medicine box 5 through the joint 2 13, and the vacant holes are blocked by quick-release plugs, which can adapt to different process requirements and have good flexibility. The heating tubes 10 and cooling tubes 11 are arranged according to the maximum number of spaces, and the specific number will be designed according to the capacity of the medicine box 5. The holes of the vacant heating tubes 10 and cooling tubes 11 will be blocked with quick-release plugs.

[0072] Example 3

[0073] Based on the structure of Example 2, Figure 8 , 9As shown in 14-16, the filtration module 200 is arranged on the fixed frame 14, including a magnetic pump 15 and a centrifugal cylinder 16. The magnetic pump 15 is connected to the medicine extraction pipe arranged at the lower end of the medicine tank 5, and the centrifugal cylinder 16 is connected to the outlet of the magnetic pump 15 through a pipeline, and is used for centrifugally separating the membrane residue and the membrane removal liquid in the suspension; the centrifugal cylinder 16 includes a cylinder body 161, a liquid inlet pipe 162, a drain pipe 163, and a residue discharge port 164. The cylinder body 161 includes a cylindrical upper cylinder body and a conical lower cylinder body. The liquid inlet pipe 162 is arranged at the upper end of the upper cylinder body, and the liquid outlet of the liquid inlet pipe 162 extends into the interior of the upper cylinder body and is tangentially arranged along the inner peripheral wall of the upper cylinder body. The drain pipe 163 is arranged at the top of the upper cylinder, and the lower end thereof is provided with an extension convex pipe 1631 extending to the inside of the upper cylinder and crossing the liquid outlet of the liquid inlet pipe 162, and the extension convex pipe 1631 exceeds the liquid outlet of the liquid inlet pipe 162 by a certain distance to avoid the suspension being directly discharged without separation, which affects the filtering effect. The slag discharge port 164 is arranged at the bottom of the lower cylinder, and the slag discharge port 164 is provided with a joint 165 connected to the slag discharge pipe 166, which is quick and convenient to install; the slag discharge pipe 166 discharges the membrane slag discharged from the centrifugal cylinder to the top of the filter screen 7, that is, returns to the filter module 100 for filtration again, and completely separates the liquid medicine in the membrane slag, so as to realize automatic, continuous and complete separation of the membrane slag.

[0074] The magnetic pump 15 provides water pressure energy for the suspension entering the centrifugal cylinder 16, so that it has a working pressure of 2-3 bar, and the suspension entering the cylinder 161 moves downward along the inner wall of the cylinder 161 at a certain speed. Under the centrifugal gravity of the spiral movement, the difference in solid and liquid specific gravity is used, and the specific gravity is expanded by several thousand times by relying on the centrifugal force field. The membrane residue in the suspension is separated from the liquid medicine, and the liquid medicine is discharged from the drain pipe 163 at the top of the cylinder 161. The membrane residue falls to the discharge port 164 and flows to the back stage process. The centrifugal cylinder 16 has a large filtering capacity and a fast filtering speed. There is no filter screen inside, no need to drive, and no parts that need to be disassembled and maintained. It has a simple structure, is easy to operate, and is basically maintenance-free, which improves the filtering efficiency and the safety of operation.

[0075] In addition, if Figure 8 , 9 As shown in 14-17, the filtering module 200 also includes a temporary storage tank 17 arranged downstream of the centrifugal cylinder 16, and the temporary storage tank 17 is connected to the drain pipe 163 of the centrifugal cylinder 16 through a pipeline, and is used to precipitate the liquid discharged from the centrifugal cylinder 16. The upper end of the temporary storage tank 17 is provided with an overflow port, and the overflow port is connected to the lower end of the medicine tank 5 through a pipeline; the lower end of the temporary storage tank 17 is provided with a liquid outlet, and the connecting pipeline of the liquid outlet is provided with a magnetic pump 2 19, and the magnetic pump 2 19 pumps the demembraning liquid in the temporary storage tank 17 to the demembraning module 300.

[0076] A liquid level sensor group is provided in the temporary storage tank 17, and the liquid level sensor group is electrically connected to the magnetic pump 15 and the magnetic pump 2 19. When the liquid level sensor group detects that the liquid level in the temporary storage tank 17 is too high, in order to avoid the overflow port being blocked and the liquid overflowing the tank, the liquid level sensor group sends a signal to control the magnetic pump 15 to stop; when the liquid level sensor group detects that the liquid level in the temporary storage tank 17 is too low, the liquid level sensor group sends a signal to control the magnetic pump 2 19 to stop, to avoid empty pumping, thereby improving the safety of the equipment.

[0077] During operation, the magnetic pump 15 extracts liquid medicine from the liquid medicine tank 5, and the purified liquid medicine is stored in the temporary storage tank 17 after centrifugal filtration by the centrifugal cylinder 16, and then pumped to the main nozzle of the demembrane module 300 by the magnetic pump 2 19. At the same time, the film residue discharged from the centrifugal cylinder 16 is discharged to the filter module 100 through the residue discharge pipe 166 for re-filtration and separation, which can be used for demembrane of circuit boards with low precision requirements.

[0078] Example 4

[0079] Based on the structure of Example 2, Figure 8 , 9 As shown in , 14-16, and 18, the filtration module 200 is arranged on the fixed frame 14, and includes a magnetic pump 15 and a centrifugal cylinder 16. The centrifugal cylinder 16 is provided with a plurality of them and connected in series along the flow direction of the liquid medicine; the magnetic pump 15 is connected to the medicine extraction pipe arranged at the lower end of the liquid medicine tank 5, and the centrifugal cylinder 16 is connected to the outlet of the magnetic pump 15 through a pipeline, and is used for centrifugally separating the membrane residue and the membrane removal liquid in the suspension; the centrifugal cylinder 16 includes a cylinder body 161, a liquid inlet pipe 162, a drain pipe 163, and a residue discharge port 164. The cylinder body 161 includes a cylindrical upper cylinder body and a conical lower cylinder body. The liquid inlet pipe 162 is arranged at the upper end of the upper cylinder body, and the liquid outlet of the liquid inlet pipe 162 extends into the upper cylinder body. The drain pipe 163 is arranged inside and tangentially along the inner peripheral wall of the upper cylinder. The drain pipe 163 is arranged at the top of the upper cylinder, and its lower end is provided with an extended convex pipe 1631 extending to the inside of the upper cylinder and crossing the liquid outlet of the liquid inlet pipe 162. The extended convex pipe 1631 exceeds the liquid outlet of the liquid inlet pipe 162 by a certain distance to avoid the suspension being directly discharged without separation, which affects the filtering effect. The slag discharge port 164 is arranged at the bottom of the lower cylinder, and the slag discharge port 164 is provided with a joint 165 connected to the slag discharge pipe 166, which is quick and convenient to install; the slag discharge pipe 166 discharges the membrane slag discharged from the centrifugal cylinder to the top of the filter screen 7, that is, returns to the filter module 100 for filtration again, and completely separates the liquid in the membrane slag, thereby realizing automatic, continuous and thorough separation of the membrane slag.

[0080] The magnetic pump 15 provides water pressure energy for the suspension entering the centrifugal cylinder 16, so that it has a working pressure of 2-3 bar, and the suspension entering the cylinder 161 moves downward along the inner wall of the cylinder 161 at a certain speed. Under the centrifugal gravity of the spiral movement, the difference in solid and liquid specific gravity is used, and the specific gravity is expanded by several thousand times by relying on the centrifugal force field. The membrane residue in the suspension is separated from the liquid medicine, and the liquid medicine is discharged from the drain pipe 163 at the top of the cylinder 161. The membrane residue falls to the discharge port 164 and flows to the back stage process. The centrifugal cylinder 16 has a large filtering capacity and a fast filtering speed. There is no filter screen inside, no need to drive, and no parts that need to be disassembled and maintained. It has a simple structure, is easy to operate, and is basically maintenance-free, which improves the filtering efficiency and the safety of operation.

[0081] In this embodiment, Figure 8 , 9 As shown in 14-16 and 18, two centrifugal cylinders 16 are provided, which can ensure that the water inlet pressure of the second centrifugal cylinder is within the working pressure range of 2-3 bar, and has a good separation effect. In order to reduce the pressure loss entering the rear centrifugal cylinder 16. The centrifugal cylinder 16 located upstream is arranged below the centrifugal cylinder 16 located downstream, that is, the multiple centrifugal cylinders 16 are distributed in a stepped manner extending upward along the flow direction of the liquid medicine, and the drainage pipe 163 of the upstream centrifugal cylinder 16 is connected to the liquid inlet pipe 162 of the downstream centrifugal cylinder 16 through a right-angle connecting pipe.

[0082] In addition, if Figure 8 , 9 As shown in , 14-16, and 18, the filtration module 200 also includes a temporary storage tank 17 arranged downstream of the centrifugal cylinder 16, and the temporary storage tank 17 is connected to the drain pipe 163 of the centrifugal cylinder 16 through a pipeline, and is used to precipitate the liquid discharged from the centrifugal cylinder 16. The upper end of the temporary storage tank 17 is provided with an overflow port, and the overflow port is connected to the lower end of the medicine tank 5 through a pipeline; the lower end of the temporary storage tank 17 is provided with a liquid outlet, and the connecting pipeline of the liquid outlet is provided with a magnetic pump 2 19, and the magnetic pump 2 19 pumps the demembraning liquid in the temporary storage tank 17 to the demembraning module 300.

[0083] A liquid level sensor group is provided in the temporary storage tank 17, and the liquid level sensor group is electrically connected to the magnetic pump 15 and the magnetic pump 2 19. When the liquid level sensor group detects that the liquid level in the temporary storage tank 17 is too high, in order to avoid the overflow port being blocked and the liquid overflowing the tank, the liquid level sensor group sends a signal to control the magnetic pump 15 to stop; when the liquid level sensor group detects that the liquid level in the temporary storage tank 17 is too low, the liquid level sensor group sends a signal to control the magnetic pump 2 19 to stop, to avoid empty pumping, thereby improving the safety of the equipment.

[0084] During operation, the magnetic pump 15 extracts liquid medicine from the liquid medicine tank 5, and the purified liquid medicine is stored in the temporary storage tank 17 after two-stage centrifugal filtration by two centrifugal cylinders 16, and then pumped to the main nozzle of the demembrane module 300 through the magnetic pump 2 19. At the same time, the film residue discharged from the two centrifugal cylinders 16 is discharged to the filter module 100 through the residue discharge pipe 166 for re-filtration and separation, which can be used for demembrane of circuit boards with low precision requirements.

[0085] Example 5

[0086] Based on the structure of Example 3 or Example 4, Figure 8 , 9 As shown in , 14-16, and 19, the filtering module 200 also includes at least two cotton core filters 18, and the multiple cotton core filters 18 are connected in parallel, and one of the cotton core filters 18 is a redundant filter for backup. The inlet at the bottom of the cotton core filter 18 is connected to the liquid extraction port at the lower end of the temporary storage tank 17 through a pipeline, and the outlet at the upper end of the cotton core filter 18 is connected to the film removal module 300 on the film removal device through a pipeline. The magnetic pump 2 19 is located between the cotton core filter 18 and the temporary storage tank 17 to ensure the flow rate of the liquid medicine.

[0087] like Fig.19 As shown, an air valve 20 is provided on the inlet pipe of each cotton core filter 18, and a pressure gauge 21 and an electric valve 22 are also provided on the outlet pipe of each cotton core filter 18. The outlet pressure of the cotton core filter 18 is detected by the pressure gauge 21, and the electric valve 22 controls its valve opening according to the detected pressure to ensure the best filtering effect; in addition, when the electric valve 22 is fully opened and still cannot meet the pressure requirement, it means that the cotton core filter 18 is blocked and needs to be replaced, and the air valve 20 of the blocked cotton core filter 18 is closed, and the spare cotton core filter 18 is started at the same time, so as to ensure that the equipment can run continuously without stopping, thereby ensuring production efficiency.

[0088] When making fine lines (high precision requirements), magnetic pump 2 19 is connected to the main nozzle of the membrane removal module 300 after filtering from the temporary storage tank 17 through the cotton core filter 18. The cotton core filter 18 is connected in parallel, and the number of cotton core filters 18 to be used can be freely switched according to the pressure flow, thereby increasing the filtering speed, and the cotton core can be replaced and repaired without stopping work, which is simple and convenient to operate.

[0089] In addition, if Figure 8 , 9As shown in 14-15, the filter module 200 is integrated on the fixed frame 14, and the bottom of the fixed frame 14 is provided with foot pads and universal wheels, which can be easily moved and transported, and has good flexibility; specifically, the magnetic pump 15 and the magnetic pump 2 19 are fixed on the bottom plate inside the fixed frame 14, and the top plate of the fixed frame 14 is stepped. A temporary storage tank 17 is provided on the top plate of the fixed frame 14 located below, and a centrifugal cylinder 16 and a cotton core filter 18 are provided on the top plate of the fixed frame 14 located above, and multiple cotton core filters 18 are arranged side by side with the temporary storage tank 17, and the centrifugal cylinder 16 is located above the magnetic pump 15.

[0090] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0091] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-voltage film removal device for a circuit board, characterized in that: It includes a frame, a clamp, a demembrane module, a filter module 1 and a filter module 2. The frame includes a bottom frame and an upper frame arranged above the bottom frame. A reaction tank for demembrane is arranged inside the upper frame. A medicine box located below the reaction tank is arranged inside the bottom frame. A circuit board is loaded on the clamp and moves in a vertical state in the reaction tank through a conveying mechanism. The demembrane module is arranged in the reaction tank and includes two spray plates symmetrically arranged on both sides of the clamp with the clamp as the center; the filter module 1 is arranged in the medicine box and is used for coarse filtering of the suspension entering the medicine box; the filter module 2 is arranged on one side of the medicine box and finely filters the suspension through multiple filtrations; the demembrane liquid purified by multiple filtrations is connected to the liquid inlet pipeline of the demembrane module, and the medicine box, the filter module 1, the filter module 2 and the demembrane module form a filtering circulation system for the demembrane liquid; The spray plate includes a plurality of spray pipes evenly arranged along the conveying direction of the fixture, the spray pipes are arranged vertically, the spray pipes are arranged parallel to the circuit board on the fixture, and a plurality of evenly arranged nozzles are arranged along the vertical direction, the nozzles are arranged obliquely to the spray pipes, and the spray angle of the nozzles is 10-20°; The first filter module includes a vibration plate, a filter screen, a scraping mechanism, and a slag receiving box. The vibration plate is arranged in the middle and upper part of the medicine tank, and a filter screen is arranged on it. The scraping mechanism is arranged above the vibration plate, including an annular conveyor chain, and a plurality of evenly arranged scraping brushes are arranged on the annular conveyor chain. The scraping brush located at the bottom of the annular conveyor chain abuts against the filter screen; a liquid inlet port 2 is arranged at one end of the top of the medicine tank, and a slag receiving box connected to the medicine tank is arranged outside the other end, and the slag dropping end of the vibration plate is connected to the slag receiving box; the vibration plate includes a tray, a shock absorbing spring, a bracket, and a vibrator. The tray is an open frame structure, and its top, bottom and one side close to the slag receiving box are all open. The filter screen is arranged at the bottom opening of the tray, and shock absorbing springs are arranged at the four corners of the bottom of the tray. The shock absorbing spring is connected to the medicine tank through a fixed seat. A bracket is arranged at one end of the tray close to the slag receiving box. The bracket is a door-type arch frame, and its lower end is connected to the outside of the tray on both sides, and its upper end extends to the outside of the medicine tank. The vibrator is fixed in the middle position of the horizontal plate at the top of the bracket.

2. The high-voltage film removal device for circuit boards according to claim 1, characterized in that: The nozzles on adjacent nozzles are staggered in the vertical direction, and the inclination directions of the nozzles on adjacent nozzles are staggered.

3. The high-voltage film removal device for circuit boards according to claim 1, characterized in that: The spray plate also includes a diverter pipe and a support plate. The spray plate is fixed in the upper frame through the diverter pipe and the support plate. A liquid inlet 1 is provided at the bottom of the diverter pipe. The liquid inlet 1 is connected to the filter module 2 through the water inlet pipeline. A plurality of the spray pipes are fixed above the diverter pipe. The support plate is arranged parallel to the diverter pipe and is used to support the upper end of the spray pipe.

4. The high-voltage film removal device for circuit boards according to claim 1, characterized in that: A plurality of evenly arranged heating tubes and cooling tubes are also provided at the lower end of the medicine box. The heating tubes are spiral-shaped. The cooling tubes are arranged one by one corresponding to the heating tubes and are inserted inside the heating tubes.

5. The high-voltage film removal device for circuit boards according to claim 1, characterized in that: The filter module 2 is arranged on a fixed frame, and includes a magnetic pump 1 and a centrifugal cylinder. The magnetic pump 1 is connected to a medicine extraction pipe arranged at the lower end of the medicine tank. The centrifugal cylinder is connected to the outlet of the magnetic pump 1 through a pipeline, and is used for centrifugally separating membrane residue and membrane removal liquid in the suspension; the centrifugal cylinder includes a cylinder body, a liquid inlet pipe, a drain pipe, and a slag discharge port. The cylinder body includes a cylindrical upper cylinder body and a conical lower cylinder body. The liquid inlet pipe is arranged at the upper end of the upper cylinder body, and the liquid outlet of the liquid inlet pipe extends into the interior of the upper cylinder body and is tangentially arranged along the inner circumferential wall of the upper cylinder body. The drain pipe is arranged at the top of the upper cylinder body, and an extension convex pipe is provided at its lower end, which extends to the interior of the upper cylinder body and passes over the liquid outlet of the liquid inlet pipe. The slag discharge port is arranged at the bottom of the lower cylinder body, and a joint for connecting the slag discharge pipe is provided on the slag discharge port; the slag discharge pipe discharges the membrane residue discharged from the centrifugal cylinder to the top of the filter screen.

6. The high-voltage film removal device for circuit boards according to claim 5, characterized in that: The centrifugal cylinders are provided in plurality and are connected in series along the flow direction of the liquid medicine.

7. The high-voltage film removal device for circuit boards according to claim 5 or 6, characterized in that: The second filtration module also includes a temporary storage tank arranged downstream of the centrifugal cylinder, which is connected to the drain pipe of the centrifugal cylinder through a pipeline and is used to precipitate the liquid discharged from the centrifugal cylinder. An overflow port is arranged at the upper end of the temporary storage tank, and the overflow port is connected to the lower end of the medicine tank through a pipeline; a liquid outlet is arranged at the lower end of the temporary storage tank, and a magnetic pump 2 is arranged on the connecting pipeline of the liquid outlet.

8. The high-voltage film removal device for circuit boards according to claim 7, characterized in that: The filter module 2 also includes at least two cotton core filters, multiple cotton core filters are connected in parallel, and one of the cotton core filters is a redundant filter for backup. The inlet at the bottom of the cotton core filter is connected to the liquid extraction port at the lower end of the temporary storage tank through a pipe, and the outlet at the upper end of the cotton core filter is connected to the membrane removal module on the membrane removal equipment through a pipe.

9. The high-voltage film removal device for circuit boards according to claim 8, characterized in that: An air valve is arranged on the inlet pipe of each cotton core filter, and a pressure gauge and an electric valve are also arranged on the outlet pipe of each cotton core filter.

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