CN215757681U

CN215757681U - Novel electrolytic copper foil raw foil device

Info

Publication number: CN215757681U
Application number: CN202121772401.0U
Authority: CN
Inventors: 贾永良; 胡文义; 胡增开; 何雄英
Original assignee: Fujian Clear View Copper Foils Co ltd
Current assignee: Fujian Clear View Copper Foils Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-02-08
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a novel electrolytic copper foil forming device.A copper foil is electrodeposited on the surface of a metal annular carrier belt or other suitable flexible material carrier belts; the carrier belt has a path through the apparatus, wherein the apparatus comprises a plurality of cells arranged in series, the path comprising one side of the carrier belt passing through the plurality of cells and being immersed in the electrolyte; adjustable anode plates are correspondingly arranged in the electrolytic tanks and filled with different electrolytic solutions, and the polar distances between the anode plates in the electrolytic tanks and one side of the carrying belt immersed in the electrolytic solutions are equal or unequal. Compared with the prior art, the device can adjust each process parameter in a targeted manner according to different stages of copper foil deposition, and the polar distance between the cathode and the anode can also be adjusted in an adaptive manner, so that not only can high-quality metal foil products be continuously produced, but also equipment and process flow are simplified, and production cost is saved.

Description

Novel electrolytic copper foil raw foil device

Technical Field

The utility model relates to the technical field of electrolytic copper foil production equipment, in particular to a novel electrolytic copper foil generation device.

Background

The existing electrolytic copper foil production equipment is usually one pot of liquid, namely, electrolyte, additives and the like required by production are added into the same electrolytic tank, the solution proportion can not be adjusted according to the requirements aiming at the characteristics of different stages of metal deposition, and the process parameters such as cathode and anode distance, the electrolyte temperature, the electrolyte inlet speed and the like are difficult to be adjusted adaptively. Therefore, the existing metal foil production equipment not only brings inconvenience to production, but also needs other complicated means if high-quality metal foil is obtained, so that the equipment complexity is increased, and higher research and development test cost is needed to be applied to actual production.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a novel electrolytic copper foil generation device.

In order to achieve the purpose, the utility model provides the following technical scheme:

a new electrolytic copper foil forming device, the copper foil is electrodeposited on the surface of the metal annular carrier belt or other suitable flexible material carrier belt; the carrier belt has a path through the apparatus, wherein the apparatus comprises a plurality of cells arranged in series, the path comprising one side of the carrier belt traversing the plurality of cells in series and being immersed in electrolyte; adjustable anode plates are correspondingly arranged in the electrolytic tanks, and the polar distances between the anode plates in the electrolytic tanks and one side of the carrying belt immersed in the electrolyte are unequal.

Further, along the advancing direction of one side of the carrying belt immersed in the electrolyte, the polar distance between the anode plate in each electrolytic tank and one side of the carrying belt immersed in the electrolyte is reduced in sequence.

Furthermore, the electrolytic tanks and the anode plates are arranged in one-to-one correspondence, and in the same electrolytic tank, one side of the carrying belt immersed in the electrolyte is equal to the pole distance of the anode plates arranged correspondingly.

Further, a copper foil is electrodeposited by a first means on one side surface of a metal ring carrier tape or other suitable flexible material carrier tape; the first means comprises sealing the other side surface and the front and rear end surfaces of the carrier tape with an insulating layer.

Further, one side of the carrying belt, which is immersed in the electrolyte, is arranged in parallel with the anode plate in a flat plate manner.

Further, the polar distance between the anode plate in each electrolytic tank and one side of the carrying belt immersed in the electrolyte is 6-55 mm.

Further, the metal annular carrying belt is made of titanium raw materials or composite materials plated with precious metals on the surfaces.

Further, the side walls of two opposite sides of each electrolytic tank at a preset distance below one side of the carrier belt immersed in the electrolyte are respectively provided with an electrolyte inlet and an electrolyte outlet, the electrolyte inlet or the electrolyte outlet is provided with a control valve capable of adjusting the flow and/or the size of the electrolyte inlet or the electrolyte outlet is adjustable, and the preset distance is 12-80 mm.

Further, the carrying belt is circularly driven by a transmission part group, the transmission part group comprises a lower transmission part group arranged in the electrolytic cells at the end parts of two sides respectively, and an upper transmission part group arranged at two sides of the outside of the upper parts of the electrolytic cells respectively, the upper transmission part group positioned at one side of the electrolytic cells comprises an upper transmission part and a metal foil stripping part, the inner side surface of one end of the upper side of the carrying belt is wound on the upper transmission part, the outer side surface of the inner side of the carrying belt is in abutting contact with the surface of the metal foil stripping part, the upper transmission part and the metal stripping part rotate in opposite directions, and the carrying belt is circularly driven along the lower transmission part group and the upper transmission part group.

The metal foil is stripped by the metal stripping roller, and then passes through the passivation device to generate an anti-oxidation layer on the rear surface, and then is wound by the winding device.

The utility model has the beneficial effects that:

the utility model provides a novel electrolytic copper foil generation device which comprises a plurality of electrolytic tanks, wherein the process parameters of the temperature, the concentration, the additive components, the electrolyte inlet speed and the like of the solution in each electrolytic tank can be independently adjusted. The carrying belt serving as the cathode penetrates through the plurality of electrolytic tanks, and the adjustable anode plates are correspondingly arranged in the plurality of electrolytic tanks, so that various process parameters can be adjusted in a targeted manner in different stages of metal deposition on the carrying belt, and the polar distance between the anode and the cathode can also be adjusted in an adaptive manner, so that high-quality metal foil products can be continuously produced, equipment and process flow are simplified, and the production cost is saved.

Drawings

Fig. 1 is a schematic structural diagram of a novel electrolytic copper foil forming apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic view of a novel electrolytic copper foil forming apparatus according to another embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a carrier tape according to an embodiment of the utility model.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", "one face", "the other face", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "connected", and the like are to be construed broadly, such as "connected", may be fixedly connected, or detachably connected or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be specifically understood in specific cases by those of ordinary skill in the art.

The present invention will be described in detail with reference to the following examples.

Referring to fig. 1-3, in accordance with one aspect of the present invention, there is provided a novel electrolytic copper foil forming apparatus, wherein copper foil is electrodeposited on the surface of a metal ring carrier tape or other suitable flexible material carrier tape 1; the carrier belt 1 has a path through the apparatus, wherein the apparatus comprises a plurality of electrolysis cells 2 arranged in series, and the path comprises one side of the carrier belt 1 continuously traversing the plurality of electrolysis cells 2 and being immersed in the electrolyte; the polar distance between the anode plate 3 in each electrolytic tank 2 and the side of the carrying belt 1 immersed in the electrolyte can be equal or unequal. Specifically, one side of the carrier belt 1 can cross the plurality of electrolytic cells 2 through a gap reserved on the side wall of the adjacent electrolytic cell 2 and be immersed in the electrolyte. The gap is sized so as not to interfere with the smooth passage of the carrier tape 2 and not to contact metal deposited on the carrier tape 2. At the same time, the gap cannot be set too large to prevent the solution in the adjacent electrolytic cell 1 from diffusing from the side of high concentration to the side of low concentration. The anode plate 3 may be disposed at a first preset distance below one side of the carrier belt 2 immersed in the electrolyte, and the pole distance between the anode plate 3 and one side of the carrier belt 2 immersed in the electrolyte may be adjusted by adjusting the height of the anode plate 3. Specifically, the polar distance between the anode plate and the side of the carrier belt 2 immersed in the electrolyte can be finely adjusted by adding or subtracting a gasket with a certain thickness at the fixed position. In the utility model, other process parameters are matched, and the polar distance range is 6-55 mm. Further improved, the range of the polar distance is 8-12 mm. Because the anode corrosion in the electrolysis process can cause the disadvantages of increased power consumption, poor uniformity of metal foil products and the like, the anode plate 3 can be made of special insoluble anode materials, such as lead-antimony alloy or lead-silver alloy anodes, or DSA titanium anodes and the like. The carrier tape 2 may be made of pure titanium or stainless steel with precious metal (e.g., chromium, titanium, etc.) plated on the surface.

Further, along the advancing direction of the side of the carrying belt 1 immersed in the electrolyte, the polar distance between the anode plate 3 in each electrolytic tank 2 and the side of the carrying belt 1 immersed in the electrolyte is reduced in sequence.

Furthermore, the electrolytic tank 2 and the anode plate 3 are arranged in one-to-one correspondence, and in the same electrolytic tank 1, the electrode distance of one side of the carrying belt 1 immersed in the electrolyte is equal to that of the anode plate 3 arranged correspondingly. In a further improvement, the side of the carrier belt 1, which is immersed in the electrolyte, is arranged in parallel with the anode plate 3 in a flat plate manner. In the practice of electrolytic copper foil production, most enterprises adopt a roll-shaped cathode, which is also an equidistant electrode, but the edge of the cathode is not completely enclosed by the electrolytic bath, but is suspended in the middle of the electrolytic bath. Thus, the edge of the cathode is at a distance from the electrolytic bath and the electrolyte level. Therefore, the electric field lines at the edge of the cathode are relatively dense, and the current density at the edge is greater than that at the middle part. The edge effect prevents the current and the metal from being distributed uniformly on the surface of the cathode roll and therefore must be eliminated by special methods. In the utility model, the cathode and the anode are both parallel plates, the distances between the cathode and each part of the anode are completely equal, the edge of the cathode is limited by the electrolyte of the electrolytic cell, and the current distribution of each part on the cathode is uniform.

Further, a copper foil is electrodeposited on one side surface of the metal loop carrier tape or other suitable flexible material carrier tape 1 by a first means; wherein, the first means comprises sealing the other side surface and the front and back end surfaces of the carrier tape 1 by an insulating layer 4. The insulating layer 4 can make the metal deposit convenient follow-up metal foil's peeling off and roll-up on the lower surface of one side in the electrolyte of carrying area 1 submergence, can also avoid carrying area 2 submergence in electrolyte one side upper surface and front and back terminal surface to be corroded by electrolyte, guarantee production process's stability.

Further, the side walls of two opposite sides of each electrolytic tank 2 at a preset distance below one side of the carrier tape 1 immersed in the electrolyte are respectively provided with an electrolyte inlet 201 and an electrolyte outlet 202, the electrolyte inlet 201 or the electrolyte outlet 202 is provided with a control valve capable of adjusting the flow rate, and/or the size of the electrolyte inlet 201 or the electrolyte outlet 202 is adjustable, and the preset distance is 12-80 mm. In a further refinement, the predetermined distance may be set to 16-25 mm. And electrolyte inlet 201 can be set up centrally, perhaps can set up the less inlet 201 in a plurality of intervals on same electrolysis trough 2 to improve the even degree of inlet liquid, and reduce because of the not enough other problems that bring of ion mobility.

Further, the carrier tape 1 is circularly driven by a transmission element group, the transmission element group comprises a first lower transmission element 51 and a second lower transmission element 52 which are respectively arranged in the electrolytic tanks 2 at the end parts of the two sides, and upper

transmission element groups

53 and 54 which are respectively arranged at the two sides of the outside of the upper parts of the electrolytic tanks 1, the upper transmission element group 53 positioned at one side of the electrolytic tanks 2 comprises a first upper transmission element 531 and a compensation element 532, the diameter of the first upper transmission element 531 is larger than that of the compensation element 532, the upper transmission element group 54 positioned at the other side of the electrolytic tanks 2 comprises a second upper transmission element 541 and a metal foil stripping element 542, the inner side surface of one end of the upper part of the carrier tape 1 is wound on the roller surface of the second upper transmission element 541, the outer side surface of the second upper transmission element 541 is in pressing contact with the roller surface of the metal foil stripping element 542, and the carrier tape 1 is arranged along the first lower transmission element 51, the second lower transmission element 52, the second upper transmission element 541, the lower transmission element 51, the upper transmission element 53 and the upper transmission element 53, The upper transmission member 531, the compensation member 532 and the lower transmission member 51 are in circular transmission. The transmission is arranged to give the carrier tape 1 a suitable tension. When the outer side surface of the carrier tape 12 deposited with the metal foil runs to the second upper transmission member 541, on one hand, the carrier tape 1 continues to run forwards around the transmission member group, and on the other hand, in the direction opposite to the running direction of the carrier tape 1, the outer side surface of the carrier tape 1 is pressed against the surface of the metal foil stripping member 542, so that the metal foil can be stripped from the carrier tape 1 and conveyed to the next-stage device in the opposite direction. According to a specific embodiment of the utility model, driving medium, compensation piece, foil strip piece can be the roller form structure. In production, the anode plate 3 is connected with a direct current positive electrode, the carrying belt 1 is connected with a direct current negative electrode, and the manner of connecting the carrying belt with the direct current can be realized by arranging the

conductive rollers

501 and 502 on the first lower transmission piece 51 and the second lower transmission piece 52 respectively. As shown, the surfaces of the

conductive rollers

501 and 502 abut against the inner side surface of the carrier tape 1 and are connected with the negative electrode of the power supply.

Further, the device comprises a passivation treatment device 6 and a winding device 7. The passivation device 6 comprises a passivation treatment tank 61, an upper transmission piece III 62 and an upper transmission piece IV 63 which are positioned on two sides of a notch of the passivation treatment tank 61, and a lower transmission piece III 64 which is positioned in the passivation treatment tank 61 and can enable metal foil to be fully immersed in passivation solution, wherein the outer sides of the upper transmission piece III 62 and the upper transmission piece IV 63 are respectively provided with a pressing piece 65, and the metal foil passes through the rear surface of the passivation treatment device 6 to generate an anti-oxidation layer and then is wound by the winding device 7. According to an embodiment of the present invention, the passivation solution may be a potassium dichromate solution or the like having a certain concentration. Further in accordance with an embodiment of the present invention, the driving member and the pressing member may be roller-shaped structures.

The following describes the present invention in detail with reference to one embodiment thereof.

As shown in figure 1, the novel electrolytic copper foil forming device comprises a metal titanium carrying belt 1, three electrolytic tanks 2 arranged adjacently in parallel, a passivation treatment device 6 and a winding device 7. The metal titanium carrier belt 1 is circularly driven by the transmission gear group as described above, and the lower side of the metal titanium carrier belt 1 passes through the plurality of electrolytic tanks 2 through the gaps reserved on the side walls of the adjacent electrolytic tanks 2 and is immersed in the electrolyte. In each electrolytic tank 2, an anode plate 3 with adjustable height is respectively arranged below the lower side of the metal titanium carrying belt 1, and the lower side of the metal titanium carrying belt 1 and the anode plate 3 are arranged in parallel in a flat plate type. The anode plate 3 is connected with a direct current anode, and the carrying belt 1 is connected with a direct current cathode by arranging

conductive rollers

501 and 502 on the first lower transmission piece 51 and the second lower transmission piece 52 respectively. The distances between the anode plate 3 and the lower side of the metal titanium carrying belt 1 are 12mm,10mm and 8mm in sequence along the advancing direction of the metal titanium carrying belt 1 immersed in the electrolyte. The resulting copper foil is peeled off from the peeling roller 542, fed into a solution filled with potassium dichromate at an appropriate concentration to form a chromium oxidation preventing layer, and then fed into the take-up unit 7 to be wound.

The utility model changes the method of producing one pot of liquid by the existing electrolytic copper foil production equipment, innovatively designs the novel electrolytic copper foil generating device, can perform targeted adjustment on various process parameters for different stages of copper ion deposition on a carrying belt, and can also adaptively adjust the polar distance between a cathode and an anode, thereby being beneficial to producing high-quality metal foil products, simplifying equipment and process flow and saving production cost.

The embodiments in the above embodiments can be further combined or replaced, and the embodiments are only used for describing the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various changes and modifications made to the technical solution of the present invention by those skilled in the art without departing from the design idea of the present invention belong to the protection scope of the present invention.

Claims

1. A novel electrolytic copper foil forming device is characterized in that,

the copper foil is electrodeposited on the surface of a metal loop carrier tape or other suitable flexible material carrier tape;

said carrier strip having a path through the apparatus, wherein said apparatus comprises a plurality of cells arranged in series, said path comprising one side of said carrier strip traversing said plurality of cells in series and being immersed in electrolyte;

adjustable anode plates are correspondingly arranged in the electrolytic tanks, and the polar distances between the anode plates in the electrolytic tanks and one side of the carrying belt immersed in the electrolyte are unequal.

2. The novel electrolytic copper foil forming device as claimed in claim 1, wherein the polar distance between the anode plate in each electrolytic cell and the side of the carrier belt immersed in the electrolyte is reduced in the direction of advancing of the side of the carrier belt immersed in the electrolyte.

3. The novel electrolytic copper foil crude foil device as claimed in claim 2, wherein the electrolytic bath and the anode plate are arranged in one-to-one correspondence, and the side of the carrier belt immersed in the electrolyte is equal to the polar distance of the anode plate arranged correspondingly.

4. The novel electrolytic copper foil forming apparatus as claimed in claim 3, wherein the copper foil is electrodeposited on one side surface of a metal ring carrier tape or other suitable flexible material carrier tape by a first means; the first means comprises sealing the other side surface and the front and rear end surfaces of the carrier tape with an insulating layer.

5. The novel electrolytic copper foil crude foil device according to claim 4, wherein the carrier belt is immersed in the electrolyte and is arranged in parallel with the anode plate in a flat plate manner.

6. The novel electrolytic copper foil crude foil device according to claim 5, wherein the polar distance between the anode plate in each electrolytic cell and the side of the carrying belt immersed in the electrolyte is 6-55 mm.

7. The novel electrolytic copper foil green-forming device as claimed in claim 6, wherein said metal ring carrier tape is made of titanium material or composite material with noble metal plated on the surface.

8. The novel electrolytic copper foil crude foil device as claimed in claim 7, wherein the side walls of the two opposite sides of each electrolytic cell at a preset distance below one side of the carrier belt immersed in the electrolyte are respectively provided with an electrolyte inlet and an electrolyte outlet, the electrolyte inlet or the electrolyte outlet is provided with a control valve capable of adjusting the flow rate, and/or the electrolyte inlet or the electrolyte outlet is adjustable in size, and the preset distance is 12-80 mm.

9. The novel electrolytic copper foil forming device according to claim 8, wherein the carrier tape is circularly driven by a transmission member group, the transmission member group comprises a lower transmission member group respectively arranged in the electrolytic cells at both side ends and an upper transmission member group respectively arranged at both sides of the outside above the plurality of electrolytic cells, the upper transmission member group positioned at one side of the plurality of electrolytic cells comprises an upper transmission member and a metal foil stripping member, the inner side surface of one end of the upper side of the carrier tape is wound on the upper transmission member and the outer side surface of the carrier tape is in pressing contact with the surface of the metal foil stripping member, the upper transmission member and the metal stripping member rotate in opposite directions, and the carrier tape is circularly driven along the lower transmission member and the upper transmission member group.

10. The novel electrolytic copper foil raw foil device according to claim 9, further comprising a passivation treatment device and a winding device, wherein the passivation treatment device comprises a passivation treatment tank, upper transmission member groups positioned on two sides of a notch of the passivation treatment tank, and a lower transmission member group positioned inside the passivation treatment tank and capable of enabling the metal foil to be fully immersed in the passivation solution, and after being stripped by the metal stripping roller, the metal foil passes through the passivation treatment device to generate an oxidation resistant layer on the rear surface and then is wound by the winding device.