CN114351221A - System and method for automatically and quantitatively adding liquid medicine for electroplating printed circuit board - Google Patents
System and method for automatically and quantitatively adding liquid medicine for electroplating printed circuit board Download PDFInfo
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- CN114351221A CN114351221A CN202210145750.2A CN202210145750A CN114351221A CN 114351221 A CN114351221 A CN 114351221A CN 202210145750 A CN202210145750 A CN 202210145750A CN 114351221 A CN114351221 A CN 114351221A
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Abstract
The invention discloses a system and a method for automatically and quantitatively adding liquid medicine for electroplating a printed circuit board, and the system and the method comprise a first portal frame (1) and a liquid medicine volume adjusting device arranged on a cross beam of the first portal frame (1), wherein the liquid medicine volume adjusting device comprises a second portal frame (2) fixedly arranged on the cross beam of the first portal frame (1), a plurality of transparent medicine adding barrels (3) are fixedly arranged at the bottom of the cross beam of the second portal frame (2), a tail end port of an electromagnetic valve (4) is connected with a liquid outlet pipe (5), a plurality of third portal frames (6) corresponding to the transparent medicine adding barrels (3) are fixedly arranged on the cross beam of the second portal frame (2), a lifting electric cylinder (7) and an adjusting rod (8) are fixedly arranged on the cross beam of the third portal frame (6), and a high liquid level probe (9) is fixedly arranged on an extending end of a piston rod. The invention has the beneficial effects that: compact structure, alleviate workman working strength, shorten plating solution preparation time, greatly improve electroplating efficiency, improve the plating layer quality.
Description
Technical Field
The invention relates to the technical field of electroplating of printed circuit boards in electronic component assemblies, in particular to a system and a method for automatically and quantitatively adding a liquid medicine for electroplating of the printed circuit boards.
Background
The electronic component assembly comprises a single-sided circuit board, a double-sided circuit board, a multilayer printed circuit board, a printed circuit board and the like, and the electronic component assembly is a core component of the controller and can play an important role in controlling automatic operation of a numerical control machine tool, cutting equipment and the like. The electroplating solution comprises a liquid medicine A, a liquid medicine B and a liquid medicine C which are mixed into a whole, and the thickness of the electroplated layer is different when the volume ratio of the liquid medicine A, the liquid medicine B and the liquid medicine C is different.
The existing electroplating method comprises the following steps: a worker weighs the liquid medicine A by using the graduated cylinder, then pours the liquid medicine in the graduated cylinder into the electroplating bath, similarly pours the weighed liquid medicine B into the electroplating bath, and pours the weighed liquid medicine C into the electroplating bath; then, the worker wraps the printed circuit board with the dry film, only the through hole is ensured to be exposed, and then the worker puts the printed circuit board into the electroplating solution and finally forms an electroplated layer with a certain thickness on the inner wall of each through hole of the printed circuit board after electrifying. When the thickness of the electroplated layer needs to be changed, the volumes of the three kinds of liquid medicine injected into the electroplating bath are only needed to be changed.
However, although this plating method can achieve plating on the inner wall of the through hole of the printed circuit board, in practical operation, the following technical drawbacks still exist: I. used liquid medicine A's volume is great, and the volume that the graduated flask was called is limited, consequently need the workman to use the graduated flask to weigh many times, ensure that the volume of liquid medicine A who weighs many times equals liquid medicine A's design and add the dose, this has increased workman's working strength undoubtedly, liquid medicine A's preparation time has still been increased simultaneously, and then the electroplating efficiency of printed circuit board has been reduced, liquid medicine B and liquid medicine C also need weigh many times repeatedly with the same reason, the same working strength that has increased the workman, the electroplating efficiency of printed circuit board has been reduced. II. The accumulated and weighed liquid medicine can generate a large amount of accumulated errors undoubtedly, so that the thickness of the electroplated layer is not within the designed thickness range, and the quality of the electroplated layer is reduced. III, liquid medicine A, liquid medicine B and liquid medicine C pour into the plating bath into the back, adopt single blade stirring mode in the plating bath, be difficult to with the abundant misce bene of three kinds of liquid medicines, lead to the nature of electroplated layer poor, and then reduced the quality of electroplated layer.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a system and a method for automatically and quantitatively adding a liquid medicine for electroplating a printed circuit board, which have the advantages of compact structure, reduced working strength of workers, shortened preparation time of electroplating liquid, greatly improved electroplating efficiency and improved quality of an electroplating layer.
The purpose of the invention is realized by the following technical scheme: a system for automatically and quantitatively adding liquid medicine for electroplating a printed circuit board comprises a first portal frame and a liquid medicine volume adjusting device arranged on a cross beam of the first portal frame, wherein the liquid medicine volume adjusting device comprises a second portal frame fixedly arranged on the cross beam of the first portal frame, a plurality of transparent medicine adding barrels are fixedly arranged at the bottom of the cross beam of the second portal frame, a bottom port of each transparent medicine adding barrel penetrates through the cross beam of the first portal frame, an extending end of each transparent medicine adding barrel is connected with an electromagnetic valve, a tail end port of each electromagnetic valve is connected with a liquid outlet pipe, a plurality of third portal frames corresponding to the transparent medicine adding barrels are fixedly arranged on the cross beam of the second portal frame, a lifting electric cylinder and an adjusting rod are fixedly arranged on the cross beam of each third portal frame, a piston rod of each lifting electric cylinder sequentially penetrates through the cross beam of the third portal frame and the cross beam of the second portal frame and extends into the corresponding transparent medicine adding barrels, a high liquid level probe is fixedly arranged on the extending end of the piston rod, the lower end part of the adjusting rod penetrates through the cross beam of the second portal frame and extends into the corresponding transparent cartridge adding barrel, a low liquid level probe is fixedly arranged on the extending end of the adjusting rod, and a detection head of the low liquid level probe is arranged below a detection head of the high liquid level probe;
still set firmly many feed liquor pipes corresponding with transparent medicine feed cylinder respectively on the crossbeam of second portal frame, the lower port of feed liquor pipe stretches into in transparent medicine feed cylinder, and is located the top of high liquid level probe, and the last port department of feed liquor pipe is connected with pipeline I, and pipeline I's the other end is connected with the drawing liquid pump, and the drawing liquid port department of drawing liquid pump is connected with pipeline II, pipeline II's the other end and storage medicine bucket intercommunication.
The graduated scale that has set firmly a plurality of vertical settings between the crossbeam of first portal frame and the crossbeam of second portal frame, the graduated scale sets up in adjacent two transparent cartridge cases that add, and the bottom of second portal frame crossbeam sets firmly three transparent cartridge cases that add.
The beam below of first portal frame still is provided with the plating bath, and the plating bath sets up under the drain pipe, all is provided with a plurality of power pack on the lateral wall about the plating bath, and power pack's output shaft stretches into in the plating bath, and extends to serve and be connected with the hob.
The power unit comprises a speed reducer fixedly arranged on the side wall of the electroplating bath and a motor fixedly arranged on the speed reducer, wherein an output shaft of the motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with one end of the screw rod.
The top of high liquid level probe and low liquid level probe all sets firmly the mounting panel, and the mounting panel that is located on the high liquid level probe can be dismantled and connect on the effect of lift electric cylinder piston rod is served, and the mounting panel that is located on the low liquid level probe can be dismantled and connect on the bottom portion of adjusting the pole.
And the cylindrical surface at the upper end part of the adjusting rod is provided with an external thread, the external thread is in threaded connection with two locking nuts, and the two locking nuts respectively abut against the upper surface and the lower surface of the third portal frame beam.
The liquid pump is installed on a beam of the first portal frame.
And a liquid discharge valve positioned below the power unit is arranged on the side wall of the electroplating bath.
The liquid level sensor also comprises a controller, wherein the controller is electrically connected with the electromagnetic valve, the liquid discharge valve, the high liquid level probe and the low liquid level probe through signal wires.
A method for automatically and quantitatively adding a liquid medicine for electroplating a printed circuit board comprises the following steps:
s1, adding liquid medicine A, liquid medicine B and liquid medicine C into the three medicine storage barrels in advance by workers;
s2, a worker controls a liquid pump corresponding to the left transparent dosing barrel to start on a controller, the liquid pump pumps out liquid medicine A in a medicine storage barrel, the pumped liquid medicine sequentially passes through a pipeline II, the liquid pump, a pipeline I, an upper end port of a liquid inlet pipe, the liquid inlet pipe and a tail end port of the liquid inlet pipe and finally enters the left transparent dosing barrel, along with the rising of the water level of the liquid medicine A in the left transparent dosing barrel, when the liquid level of the liquid medicine A reaches a detection head of a high liquid level probe, the high liquid level probe immediately sends an electric signal to the controller, after the controller receives the control, the liquid pump is immediately controlled to be closed, after the controller controls the electromagnetic valve to start, the liquid medicine A in the left transparent dosing barrel sequentially passes through the electromagnetic valve, the liquid outlet pipe and the tail end port of the liquid outlet pipe and finally flows into the electroplating bath under the self gravity, when the liquid level of the liquid medicine A is reduced to the detection head of a low liquid level probe, the low liquid level probe immediately sends an electric signal to the controller, and the controller immediately controls the electromagnetic valve to be closed after receiving the electric signal; similarly, the liquid pump corresponding to the middle transparent dosing barrel is controlled to be started, namely, the liquid medicine B is pumped into the middle transparent dosing barrel and then is injected into the electroplating bath, and the liquid pump corresponding to the right transparent dosing barrel is controlled to be started, namely, the liquid medicine C is pumped into the transparent dosing barrel and then is injected into the electroplating bath;
s3, when the liquid medicine A, the liquid medicine B and the liquid medicine C are all injected into the electroplating bath, a worker controls a motor of each power unit to start, the torque of the motor is reduced by a speed reducer to drive a screw rod to rotate, the screw rod stirs the three liquid medicines, and the three liquid medicines can be uniformly mixed after being stirred and mixed for a period of time;
s4, putting a first batch of printed circuit boards to be electroplated into the electroplating bath by a worker, and electroplating an electroplated layer in the through holes of the printed circuit boards after starting a power supply;
s5, after the electroplating is finished, controlling the drain valve to start, discharging all the liquid medicine in the electroplating bath to the outside of the electroplating bath through the drain valve, and repeating the operations of the steps S2-S4 to realize the electroplating of the second batch of printed circuit boards;
s6, when the thickness of the electroplated layer is changed, a worker firstly controls a piston rod of the lifting electric cylinder corresponding to the left transparent medicine adding cylinder to extend out or retract, the piston rod drives the high liquid level probe to move downwards or upwards, so that the vertical distance between the detection head of the high liquid level probe and the detection head of the low liquid level probe is changed, when the bottom surface of the detection head of the high liquid level probe points to the corresponding scale I on the scale, the volume enclosed by the detection head of the high liquid level probe, the detection head of the low liquid level probe and the inner wall of the transparent medicine adding cylinder is equal to the volume of a newly designed liquid medicine A, and the volume of the liquid medicine A added into the electroplating bath is changed; similarly, the piston rod of the lifting electric cylinder corresponding to the middle transparent dosing cylinder is controlled to extend or retract, so that the volume of the liquid medicine B added into the electroplating bath can be changed, and the piston rod of the lifting electric cylinder corresponding to the right transparent dosing cylinder is controlled to extend or retract, so that the volume of the liquid medicine C added into the electroplating bath can be changed, and the volume ratio of the liquid medicine A to the liquid medicine B to the liquid medicine C is finally changed; repeating the operations of the steps S2-S4, so that an electroplated layer with another thickness can be electroplated in the through hole of the printed circuit board.
The invention has the following advantages: compact structure, alleviate workman working strength, shorten plating solution preparation time, greatly improve electroplating efficiency, improve the plating layer quality.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic main section view of FIG. 1;
FIG. 3 is a schematic structural view of a liquid medicine volume adjusting device;
FIG. 4 is a schematic view of the connection of the high level probe of FIG. 3 to the mounting plate;
FIG. 5 is a schematic view of the connection of the transparent cartridge of FIG. 3 to a solenoid valve;
FIG. 6 is a schematic view of the structure of the drug storage barrel;
FIG. 7 is a schematic view of the structure of the plating bath;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a schematic view of the present invention for adjusting the volume of liquid A;
in the figure, 1-a first portal frame, 2-a second portal frame, 3-a transparent loading cylinder, 4-an electromagnetic valve, 5-a liquid outlet pipe, 6-a third portal frame, 7-a lifting electric cylinder, 8-an adjusting rod, 9-a high liquid level probe, 10-a low liquid level probe, 11-a detection head, 12-a liquid inlet pipe, 13-a pipeline I, 14-a liquid pump, 15-a pipeline II, 16-a medicine storage barrel, 17-a scale, 19-an electroplating bath, 20-a screw rod, 21-a speed reducer, 22-a motor, 23-a mounting plate, 24-a locking nut and 25-a liquid discharge valve.
Detailed Description
The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:
as shown in fig. 1 to 8, a system for automatically and quantitatively adding a liquid medicine for electroplating a printed circuit board comprises a first portal frame 1 and a liquid medicine volume adjusting device arranged on a cross beam of the first portal frame 1, wherein the liquid medicine volume adjusting device comprises a second portal frame 2 fixedly arranged on the cross beam of the first portal frame 1, a plurality of transparent medicine adding barrels 3 are fixedly arranged at the bottom of the cross beam of the second portal frame 2, a bottom port of each transparent medicine adding barrel 3 penetrates through the cross beam of the first portal frame 1, an extending end of each transparent medicine adding barrel is connected with a solenoid valve 4, a tail port of each solenoid valve 4 is connected with a liquid outlet pipe 5, a plurality of third portal frames 6 corresponding to the transparent medicine adding barrels 3 are fixedly arranged on the cross beam of the second portal frame 2, a lifting electric cylinder 7 and an adjusting rod 8 are fixedly arranged on the cross beam of each third portal frame 6, a piston rod of each lifting electric cylinder 7 sequentially penetrates through the cross beam of the third portal frame 6 and the cross beam of the second portal frame 2 and extends into the corresponding transparent medicine adding barrel 3, a high liquid level probe 9 is fixedly arranged at the extending end of the piston rod, the lower end part of the adjusting rod 8 penetrates through the cross beam of the second portal frame 2 and extends into the corresponding transparent cartridge adding barrel 3, a low liquid level probe 10 is fixedly arranged at the extending end of the adjusting rod 8, and a detection head 11 of the low liquid level probe 10 is arranged below a detection head 11 of the high liquid level probe 9; still set firmly many feed liquor pipes 12 corresponding with transparent cartridge case 3 that adds on the crossbeam of second portal frame 2 respectively, the lower port of feed liquor pipe 12 stretches into in transparent cartridge case 3 that adds, and be located the top of high liquid level probe 9, the last port department of feed liquor pipe 12 is connected with pipeline I13, pipeline I13's the other end is connected with drawing liquid pump 14, drawing liquid pump 14 installs on the crossbeam of first portal frame 1, drawing liquid port department of drawing liquid pump 14 is connected with pipeline II15, pipeline II 15's the other end and store up explosive barrel 16 intercommunication.
The scale 17 that has set firmly a plurality of vertical settings between the crossbeam of first portal frame 1 and the crossbeam of second portal frame 2, scale 17 sets up in two adjacent transparent cartridge cases 3 that add, and the bottom of 2 crossbeams of second portal frame has set firmly three transparent cartridge cases 3 that add. Still be provided with plating bath 19 below the crossbeam of first portal frame 1, be provided with the flowing back valve 25 that is located power unit below on the lateral wall of plating bath 19, plating bath 19 sets up under drain pipe 5, all is provided with a plurality of power unit on the lateral wall about plating bath 19, and power unit's output shaft stretches into in plating bath 19, and extends to serve and be connected with hob 20, power unit is including setting firmly reduction gear 21 on the lateral wall of plating bath 19, the motor 22 on reduction gear 21, and the output shaft of motor 22 is connected with the input shaft of reduction gear 21, and the output shaft of reduction gear 21 is connected with the one end of hob 20.
The top of high liquid level probe 9 and low liquid level probe 10 all sets firmly mounting panel 23, and the mounting panel 23 that is located on high liquid level probe 9 can be dismantled and connect on the effect of 7 piston rods of lift electric jar is served, and the mounting panel 23 that is located on low liquid level probe 10 can be dismantled and connect on adjusting the bottom portion of pole 8. The cylindrical surface of the upper end part of the adjusting rod 8 is provided with an external thread, the external thread is in threaded connection with two locking nuts 24, and the two locking nuts 24 respectively abut against the upper surface and the lower surface of the beam of the third portal frame 6.
The liquid level detection device further comprises a controller, wherein the controller is electrically connected with the electromagnetic valve 4, the liquid discharge valve 25, the high liquid level probe 9 and the low liquid level probe 10 through signal wires, the electromagnetic valve 4 and the liquid discharge valve 25 are controlled to be started or closed through the controller, and meanwhile, liquid level signals sent to the controller by the high liquid level probe 9 and the low liquid level probe 10 can be received in real time.
A method for automatically and quantitatively adding a liquid medicine for electroplating a printed circuit board comprises the following steps:
s1, adding liquid medicine A, liquid medicine B and liquid medicine C into the three medicine storage barrels 16 in advance by workers;
s2, a worker controls a liquid pumping pump 14 corresponding to the left transparent medicine adding cylinder 3 to start on a controller, the liquid pumping pump 14 pumps the liquid medicine A in the medicine storage barrel 16, the pumped liquid medicine sequentially passes through a pipeline II15, the liquid pumping pump 14, a pipeline I13, the upper port of the liquid inlet pipe 12, the liquid inlet pipe 12 and the tail end port of the liquid inlet pipe 12 to finally enter the left transparent medicine adding cylinder 3, along with the rise of the water level of the liquid medicine A in the left transparent medicine adding cylinder 3, when the liquid level of the liquid medicine A reaches the detection head 11 of the high liquid level probe 9, the high liquid level probe 9 immediately sends an electric signal to the controller, the controller immediately controls the liquid pumping pump 14 to close after receiving the controller, after closing, the controller controls the electromagnetic valve 4 to start, the liquid medicine A in the left transparent medicine adding cylinder 3 sequentially passes through the electromagnetic valve 4, the liquid outlet pipe 5 and the tail end port of the liquid outlet pipe 5 under the self gravity and finally flows into the electroplating bath 19, when the liquid level of the liquid medicine A is reduced to the detection head 11 of the low liquid level probe 10, the low liquid level probe 10 immediately sends an electric signal to the controller, and the controller immediately controls the electromagnetic valve 4 to be closed after receiving the electric signal; similarly, the liquid pumping pump 14 corresponding to the middle transparent medicine adding cylinder 3 is controlled to be started, so that the liquid medicine B can be pumped into the middle transparent medicine adding cylinder 3 and then is injected into the electroplating bath 19, the liquid pumping pump 14 corresponding to the right transparent medicine adding cylinder 3 is controlled to be started, so that the liquid medicine C can be pumped into the transparent medicine adding cylinder 3 and then is injected into the electroplating bath 19;
s3, when the liquid medicine A, the liquid medicine B and the liquid medicine C are all injected into the electroplating bath 19, a worker controls the motors 22 of all power units to start, the torque of the motors 22 is reduced by the speed reducer 21 to drive the spiral rods 20 to rotate, the spiral rods 20 stir the three liquid medicines, and when the three liquid medicines are stirred and mixed for a period of time, the three liquid medicines can be uniformly mixed; because left hob 20 makes the liquid medicine do helical motion to the right, simultaneously hob 20 on right side makes the liquid medicine do the spiral flow to the left, compares traditional single stirring mode of blade, very big increase the area of contact of three kinds of liquid medicines, and then realized making the abundant misce bene of three kinds of liquid medicines in the short time.
S4, putting the first batch of printed circuit boards to be electroplated into the electroplating bath 19 by workers, and electroplating layers in the through holes of the printed circuit boards after the power supply is started;
s5, after the electroplating is finished, controlling the drain valve 25 to start, discharging all the liquid medicine in the electroplating bath to the outside of the electroplating bath 19 through the drain valve 25, and repeating the operations of the steps S2-S4 to realize the electroplating of the second batch of printed circuit boards; because the vertical spacing between the detection head 11 of the high liquid level probe 9 and the detection head 11 of the low liquid level probe 10 in the three transparent charging barrels 3 is always kept unchanged, the volume ratio of the liquid medicine A, the liquid medicine B and the liquid medicine C in the electroplating bath 19 is ensured to be consistent in the electroplating operation process of each batch, so that the thickness of electroplated layers electroplated on the printed circuit boards in each batch is ensured to be consistent all the time, and compared with the traditional method of adopting a graduated cylinder weighing type charging electroplating bath, the method can not generate weighing accumulated errors and greatly improves the electroplating quality;
s6, when the thickness of the electroplated layer is changed, a worker firstly controls a piston rod of the lifting electric cylinder 7 corresponding to the left transparent cartridge adding barrel 3 to extend out or retract, the piston rod drives the high liquid level probe 9 to move downwards or upwards, so that the vertical distance between the detection head 11 of the high liquid level probe 9 and the detection head 11 of the low liquid level probe 10 is changed, when the bottom surface of the detection head 11 of the high liquid level probe 9 points to a corresponding scale I on the scale 17, the volume enclosed by the detection head 11 of the high liquid level probe 9, the detection head of the low liquid level probe 10 and the inner wall of the transparent cartridge adding barrel 3 is equal to the volume of the newly designed liquid medicine A, and the volume of the liquid medicine A added into the electroplating tank 19 is changed as shown in figure 9; similarly, the piston rod of the lifting electric cylinder 7 corresponding to the middle transparent medicine adding cylinder 3 is controlled to extend or retract, so that the volume of the liquid medicine B added into the electroplating bath can be changed, the piston rod of the lifting electric cylinder 7 corresponding to the right transparent medicine adding cylinder 3 is controlled to extend or retract, so that the volume of the liquid medicine C added into the electroplating bath can be changed, and the volume ratio of the liquid medicine A, the liquid medicine B and the liquid medicine C is finally changed; repeating the operations of the steps S2-S4, so that an electroplated layer with another thickness can be electroplated in the through hole of the printed circuit board. Therefore, only the lifting of the piston rod of the lifting electric cylinder 7 needs to be controlled, so that the bottom surface of the high liquid level probe 9 is pointed to the corresponding scale on the graduated scale 17, the volume of liquid medicine in the electroplating bath 19 can be set, the manual weighing with the measuring cylinder for multiple times is not needed, the working strength of workers is greatly reduced, the liquid adding time is shortened, and the electroplating efficiency of the printed circuit board is greatly improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a system for automatic ration adds liquid medicine for printed circuit board is electroplated which characterized in that: the device comprises a first portal frame (1) and a liquid medicine volume adjusting device arranged on a cross beam of the first portal frame (1), wherein the liquid medicine volume adjusting device comprises a second portal frame (2) fixedly arranged on the cross beam of the first portal frame (1), the bottom of the cross beam of the second portal frame (2) is fixedly provided with a plurality of transparent medicine adding barrels (3), the bottom port of each transparent medicine adding barrel (3) penetrates through the cross beam of the first portal frame (1), the extending end of each transparent medicine adding barrel is connected with a solenoid valve (4), the tail end port of each solenoid valve (4) is connected with a liquid outlet pipe (5), a plurality of third portal frames (6) corresponding to the transparent medicine adding barrels (3) are fixedly arranged on the cross beam of each second portal frame (2), a lifting electric cylinder (7) and an adjusting rod (8) are fixedly arranged on the cross beam of each third portal frame (6), and a piston rod of each lifting electric cylinder (7) sequentially penetrates through the cross beam of each third portal frame (6), A crossbeam of the second portal frame (2) extends into the corresponding transparent cartridge adding barrel (3), a high liquid level probe (9) is fixedly arranged on the extending end of the piston rod, the lower end part of the adjusting rod (8) penetrates through the crossbeam of the second portal frame (2) and extends into the corresponding transparent cartridge adding barrel (3), a low liquid level probe (10) is fixedly arranged on the extending end of the adjusting rod (8), and a detection head (11) of the low liquid level probe (10) is arranged below a detection head (11) of the high liquid level probe (9);
still set firmly many feed liquor pipes (12) corresponding with transparent cartridge case (3) that add on the crossbeam of second portal frame (2) respectively, the lower port of feed liquor pipe (12) stretches into in transparent cartridge case (3) that add, and be located high liquid level probe (9), the last port department of feed liquor pipe (12) is connected with pipeline I (13), the other end of pipeline I (13) is connected with drawing liquid pump (14), the drawing liquid mouth department of drawing liquid pump (14) is connected with pipeline II (15), the other end and medicine storage barrel (16) intercommunication of pipeline II (15).
2. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: the scale (17) that a plurality of vertical settings have set firmly between the crossbeam of first portal frame (1) and the crossbeam of second portal frame (2), scale (17) set up in adjacent two transparent add between cartridge case (3), and the bottom of second portal frame (2) crossbeam sets firmly three transparent cartridge case (3) that adds.
3. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: still be provided with plating bath (19) below the crossbeam of first portal frame (1), plating bath (19) set up under drain pipe (5), all are provided with a plurality of power pack on the lateral wall about plating bath (19), and power pack's output shaft stretches into in plating bath (19), and extends to serve and be connected with hob (20).
4. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 3, wherein: the power unit comprises a speed reducer (21) fixedly arranged on the side wall of the electroplating bath (19) and a motor (22) fixedly arranged on the speed reducer (21), wherein an output shaft of the motor (22) is connected with an input shaft of the speed reducer (21), and an output shaft of the speed reducer (21) is connected with one end of a screw rod (20).
5. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: the top of high liquid level probe (9) and low liquid level probe (10) all has set firmly mounting panel (23), and mounting panel (23) that lie in on high liquid level probe (9) can be dismantled and connect on the effect of lift electric cylinder (7) piston rod is served, and mounting panel (23) that lie in on low liquid level probe (10) can be dismantled and connect on the bottom portion of adjusting pole (8).
6. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: the cylindrical surface of the upper end part of the adjusting rod (8) is provided with an external thread, the external thread is connected with two locking nuts (24) in a threaded manner, and the two locking nuts (24) are respectively abutted against the upper surface and the lower surface of the beam of the third portal frame (6).
7. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: the liquid pump (14) is arranged on a beam of the first portal frame (1).
8. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 3, wherein: and a drain valve (25) positioned below the power unit is arranged on the side wall of the electroplating tank (19).
9. The system for automatically and quantitatively adding the chemical solution for electroplating the printed circuit board according to claim 1, wherein: the device also comprises a controller, wherein the controller is electrically connected with the electromagnetic valve (4), the drain valve (25), the high liquid level probe (9) and the low liquid level probe (10) through signal wires.
10. A method for automatically and quantitatively adding a chemical solution for electroplating a printed circuit board, which adopts the system for automatically and quantitatively adding a chemical solution for electroplating a printed circuit board as claimed in any one of claims 1 to 9, and is characterized in that: it comprises the following steps:
s1, adding liquid medicine A, liquid medicine B and liquid medicine C into the three medicine storage barrels (16) in advance by workers;
s2, a worker controls a liquid drawing pump (14) corresponding to the left transparent medicine adding barrel (3) to be started on a controller, the liquid drawing pump (14) draws liquid medicine A in a medicine storage barrel (16), the drawn liquid medicine sequentially passes through a pipeline II (15), the liquid drawing pump (14), a pipeline I (13), an upper port of a liquid inlet pipe (12), the liquid inlet pipe (12) and a tail end port of the liquid inlet pipe (12) and finally enters the left transparent medicine adding barrel (3), along with the rising of the water level of the liquid medicine A in the left transparent medicine adding barrel (3), when the liquid level of the liquid medicine A reaches a detection head (11) of a high liquid level probe (9), the high liquid level probe (9) immediately sends an electric signal to the controller, the liquid drawing pump (14) is immediately controlled to be closed after the control, the controller controls an electromagnetic valve (4) to be started, the liquid medicine A in the left transparent medicine adding barrel (3) sequentially passes through the electromagnetic valve (4) under the self gravity, The liquid outlet pipe (5) and the tail end port of the liquid outlet pipe (5) finally flow into the electroplating bath (19), when the liquid level of the liquid medicine A is reduced to the detection head (11) of the low liquid level probe (10), the low liquid level probe (10) immediately sends an electric signal to the controller, and the controller immediately controls the electromagnetic valve (4) to be closed after receiving the electric signal; similarly, the liquid pumping pump (14) corresponding to the middle transparent cartridge adding barrel (3) is controlled to be started, namely the liquid medicine B is pumped into the middle transparent cartridge adding barrel (3) and then is injected into the electroplating bath (19), and the liquid pumping pump (14) corresponding to the right transparent cartridge adding barrel (3) is controlled to be started, namely the liquid medicine C is pumped into the transparent cartridge adding barrel (3) and then is injected into the electroplating bath (19);
s3, when the liquid medicine A, the liquid medicine B and the liquid medicine C are all injected into the electroplating bath (19), a worker controls a motor (22) of each power unit to start, the torque of the motor (22) is reduced by a speed reducer (21) to drive a spiral rod (20) to rotate, the spiral rod (20) stirs the three liquid medicines, and after the three liquid medicines are stirred and mixed for a period of time, the three liquid medicines can be uniformly mixed;
s4, putting the first batch of printed circuit board to be electroplated into the electroplating bath (19) by a worker, and electroplating a plating layer in the through hole of the printed circuit board after starting a power supply;
s5, after the electroplating is finished, controlling the drain valve (25) to start, discharging all the liquid medicine in the electroplating tank to the outside of the electroplating tank (19) through the drain valve (25), and repeating the operations of the steps S2-S4 to realize the electroplating of the second batch of printed circuit boards;
s6, when the thickness of the electroplated layer is changed, a worker firstly controls a piston rod of a lifting electric cylinder (7) corresponding to the left transparent cartridge adding barrel (3) to extend out or retract, the piston rod drives the high liquid level probe (9) to move downwards or upwards, so that the vertical distance between a detection head (11) of the high liquid level probe (9) and a detection head (11) of the low liquid level probe (10) is changed, when the bottom surface of the detection head (11) of the high liquid level probe (9) points to a corresponding scale I on a scale (17), the volume enclosed by the detection head (11) of the high liquid level probe (9), the detection head of the low liquid level probe (10) and the inner wall of the transparent cartridge adding barrel (3) is equal to the volume of newly designed liquid medicine A, so that the volume of the liquid medicine A added into the electroplating bath (19) is changed; similarly, the piston rod of the lifting electric cylinder (7) corresponding to the middle transparent medicine adding cylinder (3) is controlled to extend or retract, so that the volume of the liquid medicine B added into the electroplating bath can be changed, the piston rod of the lifting electric cylinder (7) corresponding to the right transparent medicine adding cylinder (3) is controlled to extend or retract, so that the volume of the liquid medicine C added into the electroplating bath can be changed, and the volume ratio among the liquid medicine A, the liquid medicine B and the liquid medicine C is finally changed; repeating the operations of the steps S2-S4, so that an electroplated layer with another thickness can be electroplated in the through hole of the printed circuit board.
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| CN116083999A (en) * | 2023-03-07 | 2023-05-09 | 四川英创力电子科技股份有限公司 | Device and method for precisely adding liquid medicine into electroplating bath |
| CN116219414A (en) * | 2023-02-01 | 2023-06-06 | 四川英创力电子科技股份有限公司 | Copper plating device and method for improving electroless plating quality of circuit board |
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| CN114351221B (en) | 2022-10-25 |
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