Vertical film removing device for circuit board

Abstract

The utility model provides a vertical film removing device of a circuit board, which comprises a rack, a clamp and a film removing mechanism, the rack comprises a bottom frame and an upper frame arranged above the bottom frame, a liquid medicine box is arranged in the bottom frame, a filtering mechanism is arranged in the liquid medicine box, a reaction tank is arranged in the upper frame, and the film removing mechanism is arranged in the reaction tank. The clamp moves in the reaction tank in a vertical state through the conveying mechanism, the film removing mechanism is arranged in the reaction tank and comprises two spraying discs symmetrically arranged on the two sides of the clamp with the clamp as the center, each spraying disc comprises a plurality of spraying pipes evenly distributed in the conveying direction of the clamp, the spraying pipes are vertically arranged and provided with a plurality of evenly-distributed nozzles, and the nozzles are arranged on the spraying discs. And the nozzle and the spray pipe are obliquely arranged. According to the utility model, the film is removed by adopting a vertical film removing mode, the nozzles are obliquely arranged, the film at a dead angle position or a position with smaller line width and line distance can be thoroughly removed, slag inclusion is avoided, and a circulating system of liquid medicine is formed through the liquid medicine tank, the spraying disc and the reaction tank, so that resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing, in particular to a vertical 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 strong alkaline solution to remove the etching resist layer protecting the copper surface at 50℃-60℃ to reveal the circuit pattern. The chemical reaction between the chemical solution and the exposed anti-corrosion layer on the PCB board causes it to fall off.

[0003] The traditional film removal device adopts horizontal film removal, which has some problems: when spraying the solution, due to the influence of the gravity of the solution, the exchange speed of the solution on the upper and lower surfaces of the circuit board is different, which leads to uneven film removal on the upper and lower surfaces and poor film removal effect; and due to the large area of ​​the substrate, it is easy to leave film residues, resulting in low film removal efficiency and incomplete cleaning of film residues; the horizontal film removal device generally uses a roller group to drive the circuit board to move, which is easy to produce indentations on the board surface and cause circuit defects. When producing ultra-fine circuits, it will cause circuit short circuits or open circuits, and the roller group has a large shielding area, resulting in uneven film removal.

[0004] In addition, with the development of the PCB industry, the impedance requirements of various conductors are getting higher and higher, which inevitably requires stricter control of the conductor width. The nozzle of the current film removal device generally sprays the solution 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. Utility Model Content

[0005] The utility model aims to provide a vertical film removal device for a circuit board to overcome the shortcomings in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a vertical film removal device for a circuit board, comprising a frame, a clamp and a film removal mechanism, the frame comprising a bottom frame and an upper frame arranged above the bottom frame, a medicine box is arranged inside the bottom frame, a filtering mechanism is arranged inside the medicine box, a reaction tank for film removal is arranged inside the upper frame, a circuit board is loaded on the clamp, and is moved in a vertical state in the reaction tank through a conveying mechanism, the film removal mechanism is arranged in the reaction tank, comprising two spray discs, the two spray discs are symmetrically arranged on both sides of the clamp with the clamp as the center, the spray disc comprises a plurality of nozzles evenly arranged along the conveying direction of the clamp, the nozzle is vertically arranged, and a plurality of evenly arranged nozzles are arranged along the vertical direction, the nozzle is arranged parallel to the circuit board on the clamp, and the nozzle is inclined to the nozzle, that is, the nozzle does not spray vertically on the circuit board.

[0007] Furthermore, in the above-mentioned vertical film removal device for circuit boards, the spray angle of the nozzle (the angle between the central axis of the nozzle and the horizontal direction) is 10-20°, that is, the angle between the nozzle and the nozzle is 70-80°.

[0008] Furthermore, in the above-mentioned vertical film removal device for circuit boards, the nozzles on adjacent nozzles are staggered in the vertical direction.

[0009] Furthermore, in the vertical film removal device for circuit boards, the nozzles on adjacent nozzles are tilted in staggered directions, specifically: the nozzles of one nozzle are all tilted upward, and the nozzles on the adjacent nozzles are all tilted downward at the same tilt angle.

[0010] Furthermore, in the vertical film removal device for the above-mentioned circuit board, 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 is provided at the bottom of the diverter pipe, and the liquid inlet is connected to the medicine tank through a water inlet pipeline. A plurality of the spray pipes are fixed above the diverter pipe, and 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 vertical film removal device for the above-mentioned circuit board, a quick-release joint is provided at the bottom of the nozzle, and is connected to the flow channel arranged inside the diversion pipe through the quick-release joint; a through hole corresponding to the nozzle is provided on the support plate, and a plug is provided on the top of the nozzle, and the plug is inserted in the through hole and extends above the support plate.

[0012] Furthermore, in the vertical film removal device of the above-mentioned circuit board, the conveying mechanism is used to vertically convey the clamp, including a transmission assembly arranged at the bottom of the upper frame, the transmission assembly is used to drive the clamp to move along the conveying direction, including a transmission seat, a transmission shaft, a driven shaft, a magnetic wheel one, and a magnetic wheel two. The transmission shaft is arranged along the conveying direction and is arranged parallel to the outside of the transmission seat. The transmission shaft is connected to the servo motor through a coupling. There are multiple driven shafts, which are arranged inside the transmission seat and rotatably connected to the transmission seat. A magnetic wheel two is fixed on one end of each driven shaft extending out of the transmission seat, and a plurality of magnetic wheels one corresponding to the magnetic wheel two are arranged on the transmission shaft, and the magnetic wheel one cooperates with the magnetic wheel two. Each driven shaft is also provided with a roller located inside the transmission seat, and the bottom of the clamp is connected to the roller.

[0013] Furthermore, in the above-mentioned vertical film removal device for the circuit board, the conveying mechanism also includes a guide assembly on the top of the upper frame, the guide assembly includes a guide seat plate and an upper guide wheel, the guide seat plate is a U-shaped groove plate arranged along the conveying direction, and a plurality of groups of upper guide wheels arranged in parallel in pairs are provided on both sides of the bottom, and the upper end of the clamp passes between the upper guide wheels arranged in pairs.

[0014] Furthermore, in the above-mentioned vertical film removal device for circuit boards, a cavity is provided inside the upper frame at the rear side of the reaction tank for the rotation of an unloaded fixture, and a conveying mechanism is also provided inside the cavity.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a simple and compact structure, and adopts a vertical film removal method, which can solve the problem of uneven and incomplete film removal in horizontal film removal, and the nozzle is tilted and does not spray vertically on the circuit board, which can remove the etching resist layer in the dead corners of the circuit board or positions with small line width and line spacing, avoid slag inclusion, and ensure clean and thorough film removal; in addition, a medicine water circulation system is formed by the medicine water tank, spray plate, and reaction tank, which is convenient for recycling the medicine water for reuse and saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a vertical film removal device for a circuit board of the utility model;

[0018] Figure 2 This is a schematic diagram of the interior of the upper rack of the vertical film removal device for the circuit board of the utility model;

[0019] Figure 3 for Figure 2 Side view of

[0020] Figure 4 It is a schematic diagram of the film removal mechanism of the vertical film removal device for circuit boards of the utility model;

[0021] Figure 5 This is a front view of the spray plate of the vertical film removal device for circuit boards of the utility model;

[0022] Figure 6 It is a side view of the spray plate of the vertical film removal device of the circuit board of the utility model;

[0023] In the figure: 1, frame; 11, bottom frame; 12, upper frame; 13, reaction tank;

[0024] 2. Fixture;

[0025] 3. Film removal mechanism; 31. Spray plate; 311. Spray pipe; 312. Nozzle; 313. Diverter pipe; 3131. Liquid inlet; 314. Support plate; 315. Quick-release connector; 316. Plug;

[0026] 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;

[0027] 5. Medicine box. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] like Figure 1-6 As shown, a vertical film removal device for a circuit board comprises a frame 1, a fixture 2 and a film removal mechanism 3. The frame 1 comprises a bottom frame 11 and an upper frame 12 arranged above the bottom frame 11. A medicine box 5 is arranged inside the bottom frame 11, and a filtering mechanism (not shown in the figure) is arranged inside the medicine box 5. A reaction tank 13 for film removal is arranged inside the upper frame 12. Switch doors are arranged at the front and rear sides of the upper frame 12, and an observation window is arranged on the door. The circuit board is loaded on the fixture 2 and is conveyed in a vertical state in the reaction tank 13 by the conveying mechanism 4. The film removal mechanism 3 is arranged in the reaction tank 13, and includes two spray discs 31. The two spray discs 31 are symmetrically arranged on both sides of the fixture 2 with the fixture 2 as the center. The spray disc 31 includes a plurality of nozzles 311 evenly arranged along the conveying direction of the fixture 2. The nozzle 311 is vertically arranged, and a plurality of evenly arranged nozzles 312 are arranged along the vertical direction. The nozzle 311 is arranged parallel to the circuit board on the fixture 2, and the nozzle 312 is inclined to the nozzle 311, that is, the nozzle 312 does not spray vertically on the circuit board. The utility model adopts a vertical film removal method to remove the film, which can solve the problem of uneven and incomplete film removal in horizontal film removal, and the nozzle 312 is 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; in addition, the medicine tank 5 is arranged in the base frame 11, and when spraying, the medicine enters the spray plate 31 from the medicine tank 5 through the water inlet pipe to spray out the film, and after the film is removed, the medicine carries the film residue from the reaction tank 13 into the medicine tank 5, and then flows into the bottom of the medicine tank 5 after being filtered by the filtering mechanism in the medicine tank 5, and the filtered medicine is recycled and reused to form a medicine circulation system, and the overall structure is compact, which is convenient for recycling medicine and saves resources.

[0031] In the above structure, if Figure 6 As shown, the spray angle A of the nozzle 312 (the angle between the central axis of the nozzle and the horizontal direction) is 10-20°, that is, the angle B between the nozzle 312 and the nozzle 311 is 70-80°.

[0032] like Figure 4-6 As shown, the nozzles 312 on adjacent nozzles 311 are staggered in the vertical direction, and the liquid medicine sprayed from the nozzles 312 is fan-shaped, fully covering the circuit board on the fixture 2.

[0033] like Figure 4-6 As shown, the inclination directions of the nozzles 312 on adjacent nozzles 311 are staggered. Specifically, the nozzles 312 of one nozzle 311 are all tilted upward, and the nozzles 312 on the adjacent nozzles 311 are all tilted downward at the same inclination angle. This arrangement allows the spraying to be in two vertically staggered fan shapes, with a wider spraying range, further ensuring that the etching resist layer at the dead corners of the circuit board or at positions with small line widths and line spacings is completely removed.

[0034] Example 2

[0035] Based on the structure of Example 1, Figure 4-6 As shown, the spray plate 31 also includes a shunt pipe 313 and a support plate 314. The spray plate 31 is fixed in the upper frame 12 through the shunt pipe 313 and the support plate 314. The bottom of the shunt pipe 313 is provided with a liquid inlet 3131, and the liquid inlet 3131 is connected to the medicine water tank 5 through a water inlet pipeline. A plurality of the spray pipes 311 are fixed above the shunt pipe 313. The support plate 314 is arranged parallel to the shunt pipe 313 to support the upper end of the spray pipe 311 and improve the stability of the spray plate. The shunt pipe 313 can control the medicine water flow rate and spray pressure of a spray plate 31.

[0036] like Figure 4-6 As shown, a quick-release joint 315 is provided at the bottom of the nozzle 311, and is communicated with the flow channel provided inside the diverter pipe 313 through the quick-release joint 315; a through hole corresponding to the nozzle 311 is provided on the support plate 314, and a plug 316 is provided on the top of the nozzle 311, and the plug 316 is inserted in the through hole and extends above the support plate 314. The nozzle 311 can be quickly installed through the quick-release joint 315 and the plug 315, which has a simple structure and is easy to install.

[0037] like Figure 2-3As 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 12, 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 shafts and is arranged inside the transmission seat 411. It is rotatably connected to the transmission seat 411, and 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 wheel 2 415, and the magnetic wheel 1 414 cooperates with the magnetic wheel 2 415. Each driven shaft 413 is also provided with a roller 416 located inside the transmission seat 411, and 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 movement stability.

[0038] In addition, if 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.

[0039] 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.

[0040] like Figure 1-3 As shown, the upper rack 12 is also provided with a cavity located at the rear side of the reaction tank 13 for the rotation of the unloaded fixture 2, 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.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] 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 vertical film removal device for a circuit board, characterized in that: It includes a frame, a clamp and a film removal mechanism, the frame includes a bottom frame and an upper frame arranged above the bottom frame, the bottom frame is provided with a medicine box inside, the medicine box is provided with a filtering mechanism, the upper frame is provided with a reaction tank for film removal, the clamp is loaded with a circuit board, and moves in a vertical state in the reaction tank through a conveying mechanism, the film removal mechanism is arranged in the reaction tank, including two spray discs, the two spray discs are symmetrically arranged on both sides of the clamp with the clamp as the center, the spray disc includes a plurality of nozzles evenly arranged along the conveying direction of the clamp, the nozzle is vertically arranged, the nozzle is parallel to the circuit board on the clamp, and a plurality of evenly arranged nozzles are provided along the vertical direction, and the nozzle and the nozzle are inclined.

2. The vertical film removal device for a circuit board according to claim 1, characterized in that: The spray angle of the nozzle is 10-20°.

3. The vertical film removal device for circuit board according to claim 2, characterized in that: The nozzles on adjacent nozzles are staggered in the vertical direction.

4. The vertical film removal device for a circuit board according to claim 2, characterized in that: The inclination directions of the nozzles on adjacent nozzles are staggered.

5. The vertical 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 is provided at the bottom of the diverter pipe, and the liquid inlet is connected to the medicine tank 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.

6. The vertical film removal device for a circuit board according to claim 5, characterized in that: A quick-release joint is provided at the bottom of the nozzle, and is connected to the flow channel arranged inside the diverter pipe through the quick-release joint; a through hole corresponding to the nozzle is provided on the support plate, and a plug is provided on the top of the nozzle, and the plug is inserted into the through hole and extends above the support plate.

7. The vertical film removal device for a circuit board according to claim 1, characterized in that: The conveying mechanism is used for vertically conveying the clamp, and includes a transmission assembly arranged at the bottom of the upper frame. The transmission assembly is used for driving the clamp to move along the conveying direction, and includes a transmission seat, a transmission shaft, a driven shaft, a magnetic wheel 1, and a magnetic wheel 2. The transmission shaft is arranged along the conveying direction and is arranged parallel to the outside of the transmission seat. The transmission shaft is connected to the servo motor through a coupling. There are multiple driven shafts, which are arranged inside the transmission seat and rotatably connected to the transmission seat. A magnetic wheel 2 is fixed on one end of each driven shaft extending out of the transmission seat. A plurality of magnetic wheels 1 corresponding to the magnetic wheel 2 are arranged on the transmission shaft. The magnetic wheel 1 cooperates with the magnetic wheel 2. Each driven shaft is also provided with a roller located inside the transmission seat, and the bottom of the clamp is connected to the roller.

8. The vertical film removal device for a circuit board according to claim 7, characterized in that: The conveying mechanism also includes a guide assembly on the top of the upper frame, and the guide assembly includes a guide seat plate and an upper guide wheel. The guide seat plate is a U-shaped groove plate arranged along the conveying direction, and multiple groups of upper guide wheels arranged in parallel in pairs are provided on both sides of the bottom. The upper end of the clamp passes between the upper guide wheels arranged in pairs.

9. The vertical film removal device for a circuit board according to claim 1 or 8, characterized in that: The upper frame is also provided with a cavity located at the rear side of the reaction tank for the unloaded clamp to rotate, and a conveying mechanism is also provided inside the cavity.

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