Filtering device for film removing liquid of circuit board

Abstract

The utility model provides a circuit board stripping liquid filter device, including liquid medicine box, vibrating disk, filter screen, scraping mechanism, liquid medicine box is closed box, its top one end is equipped with liquid inlet, the outside of other end is equipped with the residue box that is communicated with liquid medicine box, vibrating disk is equipped with vibrating disk in the middle upper part of liquid medicine box, the vibrating disk is equipped with the filter screen, scraping mechanism is equipped with the residue box that is communicated with the liquid medicine box. A vibration disc is arranged on the base, the residue falling end of the vibration disc is communicated with the residue receiving box, a residue scraping mechanism is further arranged above the vibration disc, the residue scraping mechanism comprises an annular conveying chain, a plurality of scraping brushes which are evenly distributed are arranged on the annular conveying chain, and the scraping brushes located at the bottom of the annular conveying chain abut against the filter screen. The filter screen, the scraping brush and the vibration disc are combined for filtering, the structure is simple, the occupied space is small, the filtering speed is high, the filtering effect is good, and the filtering precision is convenient to control.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing, in particular to a defilming liquid filtering 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 reacts chemically with the exposed film layer on the circuit board surface to cause it to fall off, and the fallen film residue is mixed with the film removal liquid. In order to recycle and reuse the film removal liquid, a filtering device is generally used to filter and remove the film residue in the film removal liquid.

[0003] The existing filtering device generally sets a drum filter in the defilming liquid tank. Since the mesh of the drum filter is large, the filtering effect is not ideal; or a cam swing filter is set in the defilming liquid tank. The swing structure drives the filter to swing backward and shakes the filter residue to the residue receiving plate. The noise is large, the structure is complex, and the corners of the filter are prone to residue inclusion. Utility Model Content

[0004] The utility model aims to provide a filter device for filtering membrane removal liquid of a circuit board, so as to overcome the shortcomings existing in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a defilming liquid filtering device for a circuit board, comprising a medicine water tank, a vibrating disk, a filter screen, and a scraping mechanism, the medicine water tank being a closed box, a liquid inlet being provided at one end of the top, and a slag receiving box connected to the medicine water tank being provided on the other end; a vibrating disk being provided in the middle and upper part of the medicine water tank, a filter screen being provided on the vibrating disk, and a slag dropping end of the vibrating disk being connected to the slag receiving box; a scraping mechanism being provided above the vibrating disk, and the scraping mechanism comprising an annular conveying chain, a plurality of evenly arranged scraping brushes being provided on the annular conveying chain, and the scraping brush located at the bottom of the annular conveying chain abutting against the filter screen.

[0006] Furthermore, in the above-mentioned demembraning liquid filtering device for the circuit board, 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 of 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 box 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 box. The vibrator is fixed in the middle position of the horizontal plate on the top of the bracket.

[0007] Furthermore, in the above-mentioned circuit board demembraning liquid filtering device, a plurality of evenly arranged heating tubes and cooling tubes are provided at the lower end of the interior of the medicine tank, 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.

[0008] Furthermore, in the above-mentioned demembraning liquid filtration device for the circuit board, the two sides of the medicine water tank are provided with holes of no less number than the heating tubes, the heating tubes are fixed to the holes on one side of the medicine water tank by connector 1, the cooling tubes are fixed to the holes on the other side of the medicine water tank by connector 2, and the vacant holes are blocked by quick-release plugs.

[0009] Furthermore, in the above-mentioned defilming liquid filtering device for the circuit board, the annular conveyor chain includes a motor, a main sprocket, a slave sprocket, chain one, a driving shaft, a driven shaft, and chain two. The motor is fixed to the outside of the medicine tank through a motor seat, and a main sprocket is provided at the output end thereof. The main sprocket is connected to the slave sprocket provided on the driving shaft through chain one. Chain two is provided with two, which are respectively wound around the two ends of the driving shaft and the driven shaft. The driving shaft and the driven shaft are connected to the medicine tank through a bearing seat, and the two ends of the scraper brush are respectively fixed on the two chains two.

[0010] Furthermore, in the above-mentioned defilming liquid filtering device for the circuit board, the slag receiving box is attached to the outside of the medicine water box and seals the connecting opening between the slag receiving box and the medicine water box, and a material guide hopper extending to the inside of the medicine water box is provided on the side of the slag receiving box close to the medicine water box, and the material guide hopper is used to receive the film slag dropped from the vibration plate, and it extends obliquely from the bottom of the slag dropping end of the vibration plate to the inside of the slag receiving box, and a cover plate is also provided on the top of the slag receiving box, a slag discharge port is provided at the bottom of the slag receiving box, and a handle is provided on the top of the cover plate.

[0011] Furthermore, in the above-mentioned circuit board defilming liquid filtering device, a water receiving box located inside the medicine water box is provided below the liquid inlet, the bottom surface of the water receiving box is inclined, and a serrated water outlet groove is provided at the inclined lower end of the bottom surface.

[0012] Furthermore, in the above-mentioned circuit board defilming liquid filtering device, a transparent observation window is also provided on one side of the top of the medicine water tank close to the slag receiving box.

[0013] Compared with the prior art, the utility model has the following beneficial effects: it adopts the filter screen, scraper brush and vibration disk combined filtration, has a simple structure, occupies a small space, has a fast filtration speed, has a good filtration effect, and is convenient for controlling the filtration accuracy, solving the problems of slag inclusion and blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the external structure of the membrane removal liquid filtering device for the circuit board of the utility model;

[0016] Figure 2 The internal structure of the membrane removal liquid filtering device of the circuit board of the utility model is shown in FIG. Figure 1 ;

[0017] Figure 3 The internal structure of the membrane removal liquid filtering device of the circuit board of the utility model is shown in FIG. Figure 2 ;

[0018] Figure 4 It is a schematic diagram of the scraping mechanism and the vibrating plate of the defilming liquid filtering device for circuit boards of the utility model;

[0019] In the figure: 1, medicine tank; 11, liquid inlet; 12, observation window;

[0020] 2. Vibration plate; 21. Tray; 22. Shock-absorbing spring; 23. Bracket; 24. Vibrator;

[0021] 3. Filter;

[0022] 4. Slag scraping mechanism; 41. Scraping brush; 42. Motor; 43. Main sprocket; 44. Slave sprocket; 45. Chain 1; 46. Driving shaft; 47. Driven shaft; 48. Chain 2;

[0023] 5. Slag receiving box; 51. Material guide hopper; 52. Cover plate;

[0024] 6. Heating tube; 7. Cooling tube; 8. Connector 1; 9. Connector 2; 10. Water collecting box. DETAILED DESCRIPTION

[0025] 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.

[0026] Example 1

[0027] like Figure 1-4 As shown, a defilming liquid filtering device for a circuit board comprises a medicine tank 1 and a vibration plate 2, a filter screen 3 and a scraping mechanism 4 arranged in the medicine tank 1. The medicine tank 1 is a closed box body, with a liquid inlet 11 at one end of the top and a slag receiving box 5 connected to the medicine tank 1 at the other end. A liquid outlet is also provided at the lower end of one side of the medicine tank 1 for providing medicine liquid to the defilming equipment. A vibration plate 2 is provided in the middle and upper part of the medicine tank 1, and a filter screen 3 is provided on the vibration plate 2, and the slag dropping end of the vibration plate 2 is connected to the slag receiving box 5. A scraping mechanism 4 is also provided above the vibration plate 2, and the scraping mechanism 4 comprises an annular conveying chain, and a plurality of evenly arranged scraping brushes 41 are provided on the annular conveying chain, and the scraping brush 41 located at the bottom of the annular conveying chain abuts against the filter screen 3. During filtration, the demembraning liquid enters the medicine water tank 1 through the liquid inlet 11 and falls onto the filter screen 3. The vibration disk 2 vibrates, driving the filter screen 3 to vibrate, which can speed up the filtration speed and prevent the membrane residue from clogging the filter screen. At the same time, the scraping brush 41 on the scraping mechanism 4 scrapes off the membrane residue of the filter screen to prevent large volumes of membrane residue from accumulating on the filter screen, and brings the membrane residue into the residue receiving box 5 under the action of the ring conveyor chain, further preventing the membrane residue from clogging the filter screen, and achieving good filtration effect. In addition, the filter screen 3 is easy to replace, and the filter screen specifications can be replaced according to the precision of the circuit on the circuit board. The utility model sets the filtering device in the medicine water tank 1 to reduce the occupied space and make the demembraning equipment structure more compact. The filter screen 3, scraping brush 41, and vibration disk 2 are combined for filtration, which has a simple structure, fast filtration speed, good filtration effect, and convenient control of filtration accuracy, solving the problems of slag inclusion and clogging.

[0028] In the above structure, if Figure 2 , 4 As shown, the vibration plate 2 includes a tray 21, a shock-absorbing spring 22, a bracket 23, and a vibrator 24. The tray 21 is an open frame structure, and its top, bottom, and one side close to the slag box 5 are all open. The filter screen 3 is arranged at the bottom opening of the tray 21. Shock-absorbing springs 22 are arranged at the four corners of the bottom of the tray 21. The shock-absorbing spring 22 is connected to the medicine box 1 through a fixed seat. A bracket 23 is arranged at one end of the tray 21 close to the slag box 5. The bracket 23 is a door-shaped arch frame, and its lower ends are connected to the outside of the tray 21 on both sides, and its upper end extends to the outside of the medicine box 1. The vibrator 24 is fixed in the middle position of the horizontal plate at the top of the bracket 23, and is located outside the medicine box 1, with low noise. Good vibration performance is achieved through the cooperation of the vibrator 24 and the shock-absorbing spring 22, so that the film residue on the filter screen 3 can fall more smoothly to the slag box 5, avoiding the problem of slag inclusion in the corners, and the structure is simple, the space occupied is small, the filtering speed is fast, and the filtering effect is good.

[0029] like Figure 2 , 3As shown, the lower end of the medicine box 1 is also provided with a plurality of evenly arranged heating tubes 6 and cooling tubes 7, the heating tubes 6 are spiral-shaped, and the cooling tubes 7 are arranged one by one corresponding to the heating tubes 6 and inserted inside the heating tubes 6. The temperature of the film removal liquid is accurately controlled by the heating tubes 6 and the cooling tubes 7 to ensure the film removal effect.

[0030] In addition, if Figure 2 , 3 As shown, the two sides of the medicine tank 1 are provided with holes for the number of not less than the number of heating tubes 6. The heating tube 6 is fixed to the hole on one side of the medicine tank 1 through a joint 1 8, and the cooling tube 7 is fixed to the hole on the other side of the medicine tank 1 through a joint 2 9. The vacant holes are blocked by quick-release plugs, which can adapt to different process requirements and have good flexibility. The heating tubes 6 and cooling tubes 7 are arranged according to the maximum number of spaces, and the specific number will be designed according to the capacity of the medicine tank 1. The vacant holes of the heating tubes 6 and cooling tubes 7 will be blocked with quick-release plugs.

[0031] Example 2

[0032] Based on the structure of Example 1, Figure 2 , 4 As shown, the annular conveyor chain includes a motor 42, a main sprocket 43, a slave sprocket 44, a chain 1 45, a driving shaft 46, a driven shaft 47, and a chain 2 48. The motor 42 is fixed to the outside of the liquid medicine box 1 through a motor seat, and a main sprocket 43 is provided at its output end. The main sprocket 43 is connected to the slave sprocket 44 provided on the driving shaft 46 through a chain 1 44. The chain 2 48 is provided with two, which are respectively wound around the two ends of the driving shaft 46 and the driven shaft 47. The driving shaft 46 and the driven shaft 47 are connected to the liquid medicine box 1 through a bearing seat, and the two ends of the scraper 41 are respectively fixed on the two chains 2 48. When the motor 42 is started, the scraper 41 at the bottom of the chain 2 48 scrapes the surface of the filter screen 3, and under the drive of the scraper mechanism, the film residue on the surface of the filter screen 3 is brought into the residue receiving box 5, so as to avoid the accumulation of film residue on the filter screen, clogging the filter screen and affecting the filtering effect, and can reduce the cleaning and maintenance of the filter screen.

[0033] Among them, Figure 1-2 As shown, the slag receiving box 5 is attached to the outside of the medicine box 1 and seals the connection opening between the slag receiving box 5 and the medicine box 1. A guide hopper 51 extending to the inside of the medicine box 1 is provided on the side of the slag receiving box 5 close to the medicine box 1. The guide hopper 51 extends obliquely from the bottom of the slag dropping end of the vibration plate 3 to the inside of the slag receiving box 5, and is used to receive the film slag dropped from the vibration plate 3. A cover plate 52 is also provided on the top of the slag receiving box 5, and a slag discharge port is provided at the bottom of the slag receiving box 5. A handle is provided on the top of the cover plate 52. The film slag is discharged from the bottom of the slag receiving box 5 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 1 for secondary recycling; in addition, the cover plate 52 can be opened for easy maintenance and cleaning.

[0034] In addition, if Figure 2 As shown, a water receiving box 10 is provided inside the medicine water box 1 below the liquid inlet 11, the bottom surface of the water receiving box 10 is inclined, and a sawtooth-shaped water outlet groove is provided at the inclined lower end of the bottom surface. The water receiving box 10 plays a role in buffering water flow and reducing the impact of water flow on the filter 3.

[0035] In addition, if Figure 1-3 As shown, a transparent observation window 12 is further provided on one side of the top of the medicine solution box 1 close to the slag receiving box 5. The observation window 12 is specifically located above the guide hopper 51 to facilitate observation of the film slag collection situation.

[0036] 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.

[0037] 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 circuit board defilming liquid filtering device, characterized in that: It includes a medicine water box, a vibration plate, a filter screen, and a scraping mechanism. The medicine water box is a closed box with a liquid inlet at one top end and a slag receiving box connected to the medicine water box at the other end. A vibration plate is provided in the upper and middle part of the medicine water box, and a filter screen is provided on the vibration plate. The slag dropping end of the vibration plate is connected to the slag receiving box. A scraping mechanism is also provided above the vibration plate. The scraping mechanism includes an annular conveyor chain, and a plurality of evenly arranged scraping brushes are provided on the annular conveyor chain. The scraping brush located at the bottom of the annular conveyor chain abuts against the filter screen.

2. The filter device for removing film from a circuit board according to claim 1, characterized in that: 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 of the bottom surface of the tray. Shock-absorbing springs are arranged at the four corners of the bottom of the tray. The shock-absorbing springs are connected to the medicine box through a fixed seat. A bracket is arranged at one end of the tray close to the slag 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 box. The vibrator is fixed in the middle position of the horizontal plate on the top of the bracket.

3. The membrane removal liquid filtering device for circuit board 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.

4. The filter device for removing film from circuit board according to claim 3, characterized in that: The two sides of the medicine liquid tank are provided with holes for the number of heating tubes or more. The heating tubes are fixed to the holes on one side of the medicine liquid tank via a first joint, and the cooling tubes are fixed to the holes on the other side of the medicine liquid tank via a second joint. The vacant holes are blocked via quick-release plugs.

5. The filter device for removing film from a circuit board according to claim 1, characterized in that: The annular conveyor chain includes a motor, a main sprocket, a slave sprocket, chain 1, a driving shaft, a driven shaft, and chain 2. The motor is fixed to the outside of the medicine tank through a motor seat, and a main sprocket is provided at the output end of the motor. The main sprocket is connected to the slave sprocket provided on the driving shaft through chain 1. Chain 2 is provided with two, which are respectively wound around the two ends of the driving shaft and the driven shaft. The driving shaft and the driven shaft are connected to the medicine tank through a bearing seat, and the two ends of the scraper brush are respectively fixed on the two chains 2.

6. The membrane removal liquid filtering device for circuit board according to claim 1, characterized in that: The slag receiving box is attached to the outside of the medicine water box and seals the connecting opening between the slag receiving box and the medicine water box. A material guide hopper extending to the inside of the medicine water box is provided on one side of the slag receiving box close to the medicine water box. The material guide hopper is used to receive the film slag dropped from the vibration plate, and it extends obliquely from the bottom of the slag dropping end of the vibration plate to the inside of the slag receiving box. A cover plate is also provided on the top of the slag receiving box, a slag discharge port is provided at the bottom of the slag receiving box, and a handle is provided on the top of the cover plate.

7. The circuit board film removal liquid filtering device according to claim 1, characterized in that: A water receiving box located inside the medicine water box is provided below the liquid inlet. The bottom surface of the water receiving box is inclined, and a sawtooth-shaped water outlet groove is provided at the inclined lower end of the bottom surface.

8. The membrane removal liquid filtering device for circuit board according to claim 1 or 6, characterized in that: A transparent observation window is also provided on one side of the top of the medicine box close to the slag receiving box.

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