CN115216813A - Method for regulating and controlling transverse thickness of copper foil - Google Patents
Method for regulating and controlling transverse thickness of copper foil Download PDFInfo
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- CN115216813A CN115216813A CN202210830292.6A CN202210830292A CN115216813A CN 115216813 A CN115216813 A CN 115216813A CN 202210830292 A CN202210830292 A CN 202210830292A CN 115216813 A CN115216813 A CN 115216813A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000011889 copper foil Substances 0.000 title claims abstract description 86
- 230000001276 controlling effect Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 19
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 20
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000011888 foil Substances 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 description 46
- 238000010586 diagram Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 238000005282 brightening Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to a method for regulating and controlling the transverse thickness of a copper foil, which comprises the following steps: s1, generating an electrolytic copper foil; s2, transmitting and detecting the transverse thickness information of the electrolytic copper foil, and transmitting the information to a control system; s3, judging whether the coordinate is within a preset range or not, and if not, acquiring the transverse coordinate of the corresponding position exceeding the preset range; s4, adjusting the thickness of the position corresponding to the position exceeding the preset range to enable the thickness to be within the preset range: s421, adjusting the current adjustment amount required by the thickness and setting a current presetting range; s422, judging whether the current is in a current presetting range, if so, adjusting the current to enable the transverse thickness information to be in the preset range; otherwise, when the current regulation reaches the end value of the current presetting range, the current regulation is maintained, and S423: and controlling the flow of the copper sulfate electrolyte exceeding the corresponding position of the current preset range to be within a preset range. The invention adjusts the uniformity of the thickness and realizes the high-precision control of the thickness of the copper foil, thereby prolonging the service cycle of the anode plate.
Description
Technical Field
The invention relates to the technical field of raw foil production, in particular to a method for regulating and controlling the transverse thickness of a copper foil.
Background
At present, copper foil is an indispensable important basic material in the electronic industry, particularly, with the further upgrading of new energy industry, the production of electrolytic copper foil is that copper crystal grains are plated on the surface of a part soaked by flowing copper sulfate solution by a cathode roller according to the electroplating principle, the thickness of the plated copper foil depends on the size of current, the electroplating time of the cathode roller in the copper sulfate solution and the rotating speed of the cathode roller, the width of the cathode roller is the width of the copper foil, however, the current led from an anode is not uniform in the width direction of the cathode roller along with the change of a conductive layer on the surface of an anode.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a method for controlling the lateral thickness of a copper foil, which can effectively solve the problems in the prior art.
The technical scheme of the invention is as follows:
a method for regulating and controlling the transverse thickness of a copper foil comprises the following specific steps:
s1, introducing copper sulfate electrolyte between an anode unit and a cathode roller of a copper foil device to carry out electrolytic foil generation, and generating an electrolytic copper foil on the surface of the cathode roller;
s2, the electrolytic copper foil is conveyed outwards, the transverse thickness information of the electrolytic copper foil is detected through a detection unit in the conveying process, and the transverse thickness information is transmitted to the control system;
s3, the control system judges whether the transverse thickness information is in a preset range or not according to the transverse thickness information, if so, no operation is performed; if not, acquiring a transverse coordinate of a position corresponding to the position of the electrolytic copper foil, in which the transverse thickness information exceeds a preset range;
s4, adjusting the thickness of the position corresponding to the transverse thickness information in the electrolytic copper foil exceeding the preset range to enable the transverse thickness information to be within the preset range, specifically:
s421, obtaining the current regulating quantity needed by the thickness regulation exceeding the preset range and setting the current preset range;
s422, the control system judges whether the current regulation is in a current presetting range according to the transverse thickness information, if so, the thickness is regulated by independently controlling the current of the anode plate region at the position corresponding to the preset range, so that the transverse thickness information is in the preset range; if not, when the current adjustment reaches the end value of the current pre-adjustment range, keeping the end value unchanged, and simultaneously entering step S423;
and S423, adjusting the thickness of the position corresponding to the transverse thickness information exceeding the preset range in the electrolytic copper foil by controlling the flow of the copper sulfate electrolyte exceeding the position corresponding to the current preset range so as to enable the thickness to be within the preset range.
Further, in step S2, the detecting units are arranged at equal intervals in the transverse direction of the electrolytic copper foil and sequentially labeled in the transverse direction, and the transverse coordinates of the position corresponding to the position where the transverse thickness information exceeds the preset range in the electrolytic copper foil can be obtained according to the sequential labels of the detecting units.
Further, in step S3, the preset range may be set according to a management and control requirement of an actual product.
Further, in step S421, the current presetting range may be set according to a control requirement of an actually produced product, and a maximum value of the current presetting range is set to 80-95% of the maximum adjustable current limit value in the lateral thickness information, and a minimum value of the current presetting range is set to 105-120% of the minimum adjustable current limit value in the lateral thickness information.
The invention has the advantages that:
the anode plate at the foil outlet end of the anode unit is provided with a plurality of short anode plates along the width direction, each short anode plate is connected with a corresponding independent direct current power supply, the input current is regulated by the respective independent direct current power supply, the thickness condition of the copper foil in the width direction is transversely detected by the detection unit, the independent direct current power supplies and the copper sulfate electrolyte flow of the secondary liquid inlet are controlled in a linkage manner to flexibly control the current of the short anode plates, so that the uniformity of the thickness is adjusted, the high-precision control of the thickness of the copper foil is realized, and the service cycle of the anode plates can be prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a foil generating apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an anode plate with a thickened edge in a foil generating apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic view of a partial structure of an anode plate with a thickened edge in a foil generating apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a liquid inlet and outlet unit in the green foil device provided by the embodiment of the invention.
Fig. 5 is a schematic diagram of an inclined surface of a secondary liquid inlet in the foil generating device according to the embodiment of the invention.
Fig. 6 is a schematic structural diagram of a regulating unit in the foil generating device according to the embodiment of the present invention.
Fig. 7 is a schematic partial structural diagram of a limiting mechanism of an adjusting unit in a foil generating device according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an adjustable unit in the foil generating apparatus according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a control unit in the foil generating device according to the embodiment of the present invention.
FIG. 10 is a schematic structural diagram of an adjustable unit and a control unit in a foil generating apparatus according to an embodiment of the present invention.
Fig. 11 is a flow chart of the intelligent control process for the copper foil thickness of the present invention.
FIG. 12 is a flow chart of the process for controlling the lateral thickness of the copper foil according to the present invention.
Detailed Description
To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail by way of examples in conjunction with the accompanying drawings:
referring to fig. 1, a foil forming apparatus includes an anode unit 1 electrically connected to a positive electrode, a cathode roller 2 electrically connected to a negative electrode, a transfer unit 14 provided at one side of the cathode roller 2, a detection unit 15 for detecting a lateral thickness (i.e., a width direction) of a copper foil, and a secondary detection unit for detecting a longitudinal thickness of the copper foil; the anode unit 1 comprises an arc-shaped machine groove 3 and a plurality of anode plates 4 which are arranged at the upper end of the arc-shaped machine groove 3 in a radial sequence respectively; the foil generating device also comprises a liquid inlet and outlet unit for adjusting the volume and concentration of the solution in the arc-shaped machine groove 3, an adjusting unit for adjusting the distance between the cathode plate and the anode plate, an adjustable unit for intelligently controlling the transverse thickness of the copper foil and a regulating and controlling unit.
The number of the anode plates 4 is 10-30, and the number of the anode plates 4 is 18 in the embodiment.
As shown in figures 2-3, the device utilizes the increase portion to make the interval between the clearance position of adjacent anode plate and the cathode roller reduce to make the corresponding position cladding thicker, effectively prevent to tear the limit.
The anode plate 4 comprises a height increasing part 41 and an anode plate main body 42, the two side edges of the anode plate main body 42, which are arranged corresponding to the adjacent anode plate 4, are respectively provided with the corresponding height increasing part 41 in a connecting way, and the minimum distance between the height increasing part 41 and the cathode roller 2 is smaller than the distance between the anode plate main body 42 and the cathode roller 2; the maximum thickness of the raised part 41 is 0.1-10% of the thickness of the anode plate main body 42, and the width of the raised part 41 is 0.1-15% of the width of the anode plate 4.
The height of the raised portion 41 is too large, which may cause uneven coating and may cause the pitch of the anode plate body 42 to be unable to be finely adjusted. The height of the raised portion 41 is too small to effectively prevent edge tearing. Preferably, the maximum thickness of the raised portion 41 is 0.5 to 5% of the thickness of the anode plate main body 42, and the width of the raised portion 41 is 0.5 to 5% of the width of the anode plate 4. More preferably, the maximum thickness of the raised portion 41 is 1 to 3% of the thickness of the anode plate main body 42, and the width of the raised portion 41 is 1 to 3% of the width of the anode plate 4. In this embodiment, the two side edges of the anode plate main body 42 extend upward in an integrated streamline shape to gradually thicken to form the raised portion 41, the maximum thickness of the raised portion 41 is 2% of the thickness of the anode plate main body 42, and the width of the raised portion 41 is 2% of the width of the anode plate 4.
As shown in fig. 4, the liquid inlet and outlet unit regulates and controls the concentration uniformity of the dissolved liquid in the whole circular arc machine groove 3, so that the concentrations of the dissolved liquid on two sides of the circular arc machine groove 3 and the liquid inlet notch 8 tend to be close to each other, and the specific structure is as follows:
business turn over liquid unit contains to set up 3 radial central authorities' axial feed liquor notch 8 of circular arc machine groove, anode plate 4 sets up radially in proper order respectively along the 8 left and right sides of feed liquor notch to 3 both sides upper ends of circular arc machine groove, clearance between negative pole roller 2 and all anode plates 4 forms the anode tank, circular arc machine groove 3 in the both sides of feed liquor notch 8 all are provided with a plurality of intercommunications the second grade inlet 9 of anode tank, second grade inlet 9 and feed liquor notch 8 are connected external corresponding solution tank through corresponding solution pump respectively, second grade inlet 9 is rectangular slit structure, and sets up the position between the connecting gap of circular arc machine groove 3 in adjacent a plurality of anode plates 4. In this embodiment, the splicing surface of the anode plate 4 is an inclined surface inclined upward.
The setting on inclined plane makes second grade inlet 9 upwards set up, avoids directly to cathode roll 2 feeding, plays the buffering effect, prevents that local production from burning the paper tinsel or the bubble problem. And a plurality of strip-shaped slit secondary liquid inlets 9 are additionally arranged to supplement additives, so that the concentration uniformity of the solution in the whole circular arc machine groove 3 is regulated, the concentration of the solution on two sides of the circular arc machine groove 4 is close to that of the liquid inlet notch 8, the thickness uniformity of the copper foil in the length direction is promoted to be improved, different additives such as brightening agents and the like can be added into the solution of the secondary liquid inlets 9 according to different stages, the rough surface crystal grains of the copper foil are fine, and the high-quality copper foil is produced.
As shown in fig. 5, a straight line AB formed by connecting a lower right end point a of the anode plate 4 with a point B on the cathode roller 2 is defined to be tangent to the cathode roller 2, a straight line AC formed by connecting the lower right end point a of the anode plate 4 with an upper right end point C of a second adjacent anode plate 4 on the anode plate 4 is defined, an included angle between the AC and the AB is defined to be α, an adjustment range of the inclined plane is defined to be 2 α, and corresponding included angles α are respectively arranged towards two sides by taking the tangent line AB as a center line (the adjustment range is associated with the thickness of the anode plate 4 and the distance between the anode plate 4 and the cathode roller), and an extension line of the straight line AD where the inclined plane is located falls within the adjustment range 2 α. Preferably, the straight line AD and the coincidence of straight line AB at inclined plane place, the inclination on this inclined plane can effectively avoid directly to the feeding of cathode roll 2, prolongs the distance between 9 exports of second grade inlet and the cathode roll 2 for liquid has sufficient buffer distance to avoid directly influencing cathode roll 2. If the inclination angle is too small, the local liquid concentration of the cathode roller 2 is rapidly increased, so that the thickness of the copper foil at the position is rapidly increased, and the overall electroplating effect is influenced; the inclination angle is crossed and is beaten the unable setting of one side, and on the other hand can produce certain vortex problem, all influences the quality of copper foil finally.
In other embodiments, the inlet slot 8 is also divided into a plurality of guide channels by corresponding partition plates, and each inlet guide channel is respectively connected with the solution pump through a corresponding metering valve and a multi-way pipe.
In other embodiments, the secondary liquid inlet 9 is divided into a plurality of diversion channels by corresponding partition plates, each liquid inlet diversion channel is connected to the solution pump through a corresponding metering valve and a multi-way pipe, the width of the diversion channel is 1-5 mm, the number of the diversion channels of the secondary liquid inlet 9 is the same as or more than that of the liquid inlet notches 8, preferably 15-25, and in this embodiment, the number of the diversion channels of the secondary liquid inlet 9 is the same as that of the liquid inlet notches 8, and is 15. The secondary liquid inlet 9 is divided into a plurality of flow guide channels to control the flow, the transverse uniformity of the copper foil is improved, the generation of seersucker and soft wrinkles is reduced, the liquid inlet amount is accurately controlled by using the metering valve, and the problem of foil burning or uneven thickness caused by excessive liquid inlet is prevented.
In other embodiments, the aperture of the secondary liquid inlet 9 along the two sides of the circular arc machine groove 3 from the liquid inlet notch 8 is gradually increased, and the maximum aperture is smaller than the aperture of the liquid inlet notch 8, and the aperture of the secondary liquid inlet 9 is gradually increased more quickly to promote the concentration uniformity of each position as the solution concentration is lower the more the two sides of the circular arc machine groove 3 go up. The width of the liquid inlet notch 8 is defined as D, wherein the width of the topmost secondary liquid inlet 9 is 0.1-0.2D, the width is limited and is matched with a metering valve to control the liquid inlet flow of the solution, the local concentration is prevented from being excessively increased, and the foil burning risk and probability can be effectively reduced.
As a further step, a liquid outlet 10 is arranged at the upper end of the inner arc surface of the arc-shaped machine groove 3 and above the topmost anode plate 4, the liquid outlet 10 is communicated with a liquid drainage channel embedded in the arc-shaped machine groove 3, and an outlet of the liquid drainage channel is arranged on the outer side of the outer arc surface of the arc-shaped machine groove 3 and has a downward opening.
As shown in fig. 6 to 7, the adjusting unit can flexibly adjust the spacing between the cathode and the anode at each position to solve the problem of increasing the gap between the anode plate and the cathode roll, and can adjust the thickness in the length direction, and the specific structure is as follows: comprises a driving mechanism for driving the anode plate 4 to move and a limiting mechanism for limiting the anode plate 4 to move up and down.
Furthermore, the driving mechanism comprises a plurality of screw rods 51 which respectively penetrate through and are screwed with the circular arc machine grooves 3, threaded holes which penetrate through the upper end and the lower end of each circular arc machine groove 3 are formed in the positions, corresponding to the anode plates 4, of the circular arc machine grooves 3, the screw rods 51 respectively penetrate through the circular arc machine grooves 3 through being in threaded connection with the corresponding threaded holes, and the tail ends of the screw rods are respectively in rotary connection with the back surfaces of the corresponding anode plates 4.
Further, the limiting mechanism comprises limiting plates 61 arranged at the upper ends of the front side and the rear side of the circular arc-shaped machine groove 3, sliding blocks 63 fixedly connected to the two ends of the limiting plates are embedded into sliding grooves 62 formed in the limiting plates 61, the anode plate 4 is vertically moved and connected and arranged between the two limiting plates 61, and the sliding grooves 62 are formed in the positions, corresponding to the anode plate 4, of the inner side surfaces of the limiting plates 61. The distance between the cathode and the anode at each position can be flexibly adjusted to solve the problem that the gap between the anode plate 4 and the cathode roller 2 is enlarged, and the screw 51 is utilized to independently control each anode plate 4 to carry out different adjustments on the anode plates 4 in copper sulfate solutions with different concentrations, thereby improving the practicability.
Further, the part of the screw 51 connected with the back of the circular arc-shaped machine groove 3 is a non-threaded rod part, a part of the threaded hole communicated with the back of the circular arc-shaped machine groove 3 is provided with a non-threaded through hole, and the surface of the non-threaded through hole is provided with a corresponding sealing ring 7; specifically, the outer diameter of the sealing ring 7 is larger than the diameter of a through hole of the circular arc machine groove 3 for installing the screw rod, the sealing ring 7 is compressed during installation, and the sealing performance of the circular arc machine groove 3 is ensured, or an existing sealing mechanism is adopted.
In other embodiments, the anode unit 1 is provided with an anode thickening plate 18 with a thickness of 1-2 mm on the upper surface of the anode plate 4 between the liquid inlet notch 8 and the foil outlet end, the distance between the anode plate 4 and the cathode roller 2 is reduced by additionally arranging the anode thickening plate 18 on the rear side, the thickness of the copper foil in the length direction can be effectively adjusted, and the thickness is increased after the particles are finer and finer along with the gradual generation of the copper foil, so that the quality of the copper foil can be ensured.
In other embodiments, the screw 51 includes a conductive portion connected to the anode plate 4 and an insulating portion disposed at one end of the arc-shaped slot 3, the conductive portions of the screw 51 are respectively connected to the corresponding first independent dc power supplies, and the input current is regulated by the respective first independent dc power supplies, and the insulating portion is sleeved with the corresponding insulating sleeve 16. The screw rod 51 is set to be a conductive part and an insulating part, the insulating part is convenient for personnel to operate and adjust safely, the conductive part can directly guide current into the anode plate 4, a conductive layer is coated on the upper surface of the anode plate 4, and the current fed into each anode plate can be flexibly adjusted according to conditions so as to adjust the copper foil generating thickness.
In other embodiments, the driving mechanism 5 further includes a detachable plate 52 fixedly mounted on the back of the anode plate 4, the end of the screw 51 is rotatably connected to the back of the detachable plate 52, and the sliding block 63 is fixedly connected to two sides of the detachable plate 52, the detachable plate 52 is disposed to facilitate the anode plate 4 to be rotatably connected to the screw 51; and when the screw 51 is provided with a conductive portion, the detachable plate 52 is provided with a conductive material, ensuring smooth conduction of electric current to the anode plate 4.
As shown in fig. 8, the adjustable unit flexibly regulates and controls the current passing through each position of the anode plate 4 at the foil outlet end of the anode unit according to the thickness condition in the width direction to adjust the uniformity of the transverse thickness and realize the high-precision control of the thickness of the copper foil, so that the service cycle of the anode can be prolonged, and the adjustable unit has the following specific structure:
the anode plate 4 at the foil outlet end of the anode unit 1 is formed by splicing 10 to 30 short anode plates 11 along the width direction, preferably, the anode plate 4 at the foil outlet end of the anode unit 1 comprises 10 to 20 short anode plates 11, and in the embodiment, the anode plate 4 at the foil outlet end of the anode unit 1 preferably comprises 15 short anode plates 11; each short anode plate 11 is respectively connected with a corresponding second independent direct current power supply 17, the input current is regulated by the respective second independent direct current power supply 17, the anode of the second independent direct current power supply 17 is connected with the short anode plate 11, and the cathode of the second independent direct current power supply 17 is respectively connected with the cathode roller 2; the uniformity of the thickness cannot be accurately adjusted due to too few short anode plates 11, and on the other hand, the larger cost is increased due to too many short anode plates, and on the other hand, the installation of equipment is not facilitated due to dense parts; the position of the anode plate 4 of the arc-shaped machine groove 3 at the foil outlet end is provided with a corresponding secondary liquid inlet 9, the secondary liquid inlet 9 at the position is divided into a plurality of flow guide channels by corresponding division plates, each liquid inlet flow guide channel is respectively connected with the solution pump through a corresponding metering valve and a multi-way pipe, and the outlet of each flow guide channel is arranged in a clearance corresponding to the adjacent two short anode plates 11.
In other embodiments, a detection unit 15 for detecting the lateral thickness of the copper foil may be further included. Preferably, in order to improve the detection accuracy and precision, the detecting units 15 are arranged at equal intervals in the transverse direction of the electrolytic copper foil, and the detecting units 15 are arranged below the conveying unit 14 and the short anode plates 11 or between adjacent conveying rollers of the conveying unit 14.
In other embodiments, the short anode plates 11 are arranged at intervals, and two opposite side edges of the short anode plates 11 are extended upwards in an integrated streamline shape and are arranged in a gradually thickened manner, the distance between the gap position and the cathode roller is reduced through the thickened arrangement, and the thickness of the copper foil at the gap position and the non-gap position is further adjusted.
As shown in fig. 9, the adjusting and controlling unit can control the electrolysis area of the effective anode unit 1 at the corresponding position by flexibly controlling the rising and falling of the shielding plate 12 according to the thickness condition in the width direction, so as to adjust the thickness of the effective anode unit, realize high-precision control of the thickness of the copper foil, and prolong the service life of the anode plate 4. The concrete structure is as follows: contain and reciprocate to set up every the shield plate 12 of short strip anode plate 11 front end, shield plate 12 install in between negative pole roller 2 and the short strip anode plate 11, shield plate 12 reciprocates the setting through corresponding lift cylinder 13 individual drive respectively.
Further, the detection unit 15 and/or the lifting cylinder 13 and/or the second independent direct current power supply 17 and/or the metering valve are/is arranged in a linkage mode through a control system. The lifting and descending of each shielding plate 12 and/or the current of each short anode plate 11 are/is controlled in a linkage manner, so that the transverse thickness of the copper foil is adjusted, and the practicability and the control accuracy are improved.
As shown in fig. 10, an embodiment of the present invention further provides an intelligent control method for a copper foil thickness, which includes the following steps:
s1, introducing a copper sulfate electrolyte between the anode unit 1 and the cathode roller 2 to perform electrolytic foil generation, and generating an electrolytic copper foil on the surface of the cathode roller 2;
s2, the electrolytic copper foil is conveyed outwards through the conveying unit 14, the transverse thickness information of the electrolytic copper foil is detected through the detection unit in the conveying process, and the transverse thickness information is transmitted to the control system;
s3, the control system judges whether the transverse thickness information is within a preset range or not according to the transverse thickness information, if so, no operation is performed, and if not, the transverse coordinate of the position corresponding to the position, in which the transverse thickness information exceeds the preset range, in the electrolytic copper foil is obtained;
and S4, adjusting the thickness of the position corresponding to the position of the electrolytic copper foil with the transverse thickness information exceeding the preset range to be within the preset range.
In step S1, the copper sulfate electrolyte may be selected from existing copper sulfate electrolytes without limitation. In the electrolytic foil production process, control of specific parameters, such as current density and concentration, is also a prior art, and will not be described again here.
In step S2, the detecting units are disposed at equal intervals in the transverse direction of the electrolytic copper foil, and are sequentially numbered in the transverse direction, so that the thickness of the electrolytic copper foil in the transverse direction can be obtained in real time. The type of the detection unit is not limited, and a non-contact detection unit, such as an X-ray thickness gauge, may be selected.
In step S3, the preset range may be set according to a management and control requirement of an actual product. Specifically, for example, in the currently mainstream 4-8mm electrolytic copper foil, the preset range may be within a tolerance of ± 20% of the actual thickness. For example, 5mm electrolytic copper foil, the predetermined range is 4.9mm to 5.1mm. And acquiring the transverse coordinate of the position corresponding to the transverse thickness information in the electrolytic copper foil exceeding the preset range according to the sequence label of the detection unit. Further, the transverse coordinate of the position corresponding to the transverse thickness information exceeding the preset range may be a single point or a plurality of points. When the transverse coordinate of the position corresponding to the transverse thickness information exceeding the preset range comprises a plurality of continuous points (and cannot be eliminated through subsequent adjustment), the transverse coordinate (with the thickness as a vertical coordinate) can be fitted to form a changed curve, so that the coordinate of the highest point or the lowest point is obtained. And when the thickness corresponding to the highest point/lowest point coordinate cannot be eliminated through adjustment subsequently, defining the highest point/lowest point coordinate as a damaged position, and further sending corresponding maintenance personnel to perform quick positioning and maintenance.
In step S4, in other embodiments, the method may further include:
s41, adjusting the thickness of the position corresponding to the transverse thickness information exceeding the preset range in the electrolytic copper foil by controlling the lifting and the falling of the shielding plate 12 exceeding the position corresponding to the preset range so as to enable the transverse thickness information to be in the preset range.
In step S41, by controlling the shield plate 12 at the position corresponding to the position exceeding the preset range to move up and down, the electrolysis area of the effective anode unit 1 at the corresponding position can be controlled to adjust the thickness thereof. Specifically, if the thickness of the copper foil at the corresponding position is thick, the shielding plate 12 at the corresponding position can be lowered to partially shield the copper foil so as to reduce the generation of the copper foil at the corresponding position; if the copper foil at a few positions is thinner, the shielding of the shielding plate 12 on the anode unit 1 is reduced to increase the generation of the copper foil at the position, and the effect of energy saving can be achieved by combining intelligent control.
In step S4, in other embodiments, the method may further include:
and S42, adjusting the thickness of the position corresponding to the transverse thickness information exceeding the preset range in the electrolytic copper foil by controlling the current of the short anode plate 11 exceeding the corresponding position of the preset range so as to enable the transverse thickness information to be in the preset range.
In step S42, the current of the short anode plates 11 at the corresponding positions exceeding the preset range is controlled, so that the electrolysis efficiency at the corresponding positions can be controlled to adjust the thickness of the short anode plates. Specifically, if the copper foil at the corresponding position is thick, the current of the short anode plate 11 at the position can be reduced to reduce the generation of the copper foil at the position; if the thickness of the copper foil at a few positions is thinner, the current of the short anode plate 11 at the position is increased to increase the generation of the copper foil at the position.
In step S42, in other embodiments, the method may further include:
s421, obtaining the current regulating quantity needed by the thickness regulation exceeding the preset range and setting the current preset range;
s422, the control system judges whether the current regulation is in a current presetting range according to the transverse thickness information, if so, the thickness is regulated by controlling the current of the short anode plates 11 at the corresponding positions, so that the transverse thickness information is in a preset range; if not, when the current regulation reaches the end value of the current presetting range, keeping the end value unchanged, and simultaneously entering step S423; specifically, the current preset range may be set according to a management and control requirement of an actually produced product, a maximum value of the current preset range is set to 80-95% of an adjustable maximum limit value of the current when the transverse thickness information is obtained, and a minimum value of the current preset range is set to 105-120% of an adjustable minimum limit value of the current when the transverse thickness information is obtained.
And S423, adjusting the thickness of the position corresponding to the position of the transverse thickness information in the electrolytic copper foil exceeding the preset range by controlling the copper sulfate electrolyte flow of the secondary liquid inlet 9 exceeding the position corresponding to the current preset range, so that the thickness is adjusted within the preset range under the condition of reducing energy consumption.
In step S4, in other embodiments, the method may further include:
s43, the thickness of the position corresponding to the position of the transverse thickness information in the electrolytic copper foil exceeding the preset range is adjusted to be within the preset range by controlling the flow of the copper sulfate electrolyte of the secondary liquid inlet 9 exceeding the position corresponding to the preset range.
In step S43, the copper sulfate electrolyte concentration at the corresponding position can be controlled to adjust the thickness of the copper sulfate electrolyte by controlling the copper sulfate electrolyte flow rate of the secondary liquid inlet 9 exceeding the corresponding position of the preset range. Specifically, if the copper foil at the corresponding position is thicker, the concentration of the copper sulfate electrolyte at the position can be weakened to reduce the generation of the copper foil at the position; if the thickness of the copper foil at a few positions is small, the concentration of the copper sulfate electrolyte at the position is increased.
In step S4, in another embodiment, the steps S41, S42, and S43 may be controlled in a linkage manner, so as to quickly adjust the thickness of the corresponding position. Specifically, when the transverse coordinate of the position corresponding to the transverse thickness information exceeding the preset range includes a plurality of continuous points, or when the thickness cannot be adjusted within the preset range by independently controlling the S41, S42 and S43, the lifting and lowering of the shielding plate 12, the current of the short anode plate 11 and the copper sulfate electrolyte flow of the secondary liquid inlet 9 can be controlled in a linked manner to perform rapid control.
In step S4, in other embodiments, the method may further include:
the liquid inlet notch 8 is also divided into a plurality of flow guide channels by corresponding partition plates, and each liquid inlet flow guide channel is connected with the solution pump through a corresponding metering valve and a multi-way pipe. The liquid inlet amount is controlled by controlling the metering valves of the flow guide channels, and the liquid inlet amount and the steps S41, S42 and S43 can be controlled in a linkage manner, so that the thickness adjustment of the corresponding position is quickly realized.
After step S4, the method may further include:
and S5, acquiring corresponding control parameters of each type of electrolytic copper foil in the production process. Therefore, in the process of generating the electrolytic copper foil with the type, the control parameters can be quickly called for production, so that the dependence on manpower can be greatly reduced, and automatic control is realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A method for regulating and controlling the transverse thickness of a copper foil is characterized by comprising the following steps: the method comprises the following specific steps:
s1, introducing a copper sulfate electrolyte between an anode unit and a cathode roller of a copper foil device to carry out electrolytic foil generation, and generating an electrolytic copper foil on the surface of the cathode roller;
s2, the electrolytic copper foil is conveyed outwards, the transverse thickness information of the electrolytic copper foil is detected by a detection unit in the conveying process, and the transverse thickness information is transmitted to the control system;
s3, the control system judges whether the transverse thickness information is within a preset range or not according to the transverse thickness information, if so, no operation is performed; if not, acquiring a transverse coordinate of a position corresponding to the position of the electrolytic copper foil, in which the transverse thickness information exceeds a preset range;
s4, adjusting the thickness of the position corresponding to the transverse thickness information in the electrolytic copper foil exceeding the preset range to enable the transverse thickness information to be within the preset range, specifically:
s421, obtaining the current regulating quantity needed by the thickness regulation exceeding the preset range and setting the current preset range;
s422, the control system judges whether the current regulation is in a current presetting range according to the transverse thickness information, if so, the thickness is regulated by independently controlling the current of the anode plate region at the position corresponding to the preset range, so that the transverse thickness information is in the preset range; if not, when the current regulation reaches the end value of the current pre-regulation range, keeping the end value unchanged, and simultaneously entering step S423;
and S423, adjusting the thickness of the position corresponding to the transverse thickness information exceeding the preset range in the electrolytic copper foil by controlling the flow of the copper sulfate electrolyte exceeding the position corresponding to the current preset range so as to ensure that the thickness is within the preset range.
2. The intelligent control method for the thickness of the copper foil according to claim 1, characterized in that: in step S2, the detecting units are arranged at equal intervals along the transverse direction of the electrolytic copper foil, and sequentially labeled along the transverse direction, and the obtained transverse coordinate of the position corresponding to the position where the transverse thickness information exceeds the preset range in the electrolytic copper foil can be obtained according to the sequential label of the detecting unit.
3. The method for controlling the transverse thickness of the copper foil according to claim 1, wherein: in step S3, the preset range may be set according to the management and control requirement of the actual product.
4. The method for regulating the transverse thickness of the green foil as claimed in claim 1, wherein: in step S421, the current presetting range may be set according to a management and control requirement of an actually produced product, and a maximum value of the current presetting range is set to 80-95% of an adjustable maximum limit value of current when the lateral thickness information is received, and a minimum value of the current presetting range is set to 105-120% of an adjustable minimum limit value of current when the lateral thickness information is received.
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| CN115216813B (en) | 2024-04-16 |
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