Electrolytic copper foil production apparatus with high immersion rate

Abstract

The application provides a high-impregnation-rate electrolytic copper foil production device, which comprises a shell, a first anode groove in an arc shape is formed in the top surface of the shell, a liquid inlet channel is formed in the groove bottom of the first anode groove, a cover is arranged on the top of the shell, a second anode groove in an arc shape is formed in the bottom surface of the cover, a discharge opening is formed in the groove bottom of the second anode groove and is communicated to the upper end surface of the cover, the first anode groove and the second anode groove are tightly arranged after the cover is closed, a plurality of anode plates are sequentially arranged on the inner walls of the first anode groove and the second anode groove in a circumferential direction, a cathode roller is rotatably arranged at the opposite side walls of the first anode groove, the cathode roller is arranged at intervals with the plurality of anode plates, and an electrolysis area is formed between the plurality of anode plates and the cathode roller. The production efficiency of the whole foil production device can be improved, and the oxidation of the cathode roller can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrolytic copper foil foiling device, in particular to a high immersion rate electrolytic copper foil foiling device. BACKGROUND

[0002] The electrolytic copper foil foiling device mainly sets the anode plate and the cathode roller in the anode groove, adds the electrolyte between the anode plate and the cathode roller, and passes the current through the anode plate and the cathode roller. According to the principle of electroplating, the surface of the cathode roller immersed in the electrolyte will be plated with copper grains. With the rotation of the cathode roller, the copper foil plated on the surface of the cathode roller is continuously peeled off, and the process of electrolytic copper foil foiling is completed.

[0003] At present, the anode groove of the existing foiling device is generally semicircular because the cathode roller needs to be frequently disassembled for replacement, maintenance and maintenance. For example, the patent application with the title of a foiling machine capable of accurately controlling the overall area density of copper foil, application number 201910335207.7, the cross section of the circular arc anode groove is semicircular. This setting makes the area of the anode plate and the cathode roller in contact with the copper sulfate solution for electrolysis small, the area of the copper foil attached to the surface of the cathode roller for electroplating small, thereby reducing the overall production efficiency of the foiling device. In addition, only the lower half of the cathode roller is immersed in the electrolyte, and the unimmersed part is exposed to the air in a large area, which is easy to cause oxidation and reduce the overall service life of the cathode roller. SUMMARY

[0004] The present application provides a high immersion rate electrolytic copper foil foiling device, which can effectively solve the above problems.

[0005] The present application is implemented as follows:

[0006] A high immersion rate electrolytic copper foil foiling device, comprising:

[0007] A shell with an arc-shaped first anode groove in the top surface, the groove bottom of the first anode groove is provided with a liquid inlet channel;

[0008] A cover body with a sealing cover on the top of the shell, the bottom surface of the cover body is provided with an arc-shaped second anode groove, the groove bottom of the second anode groove is provided with a discharge opening connected to the upper end surface of the cover body. After the cover body is closed, the first anode groove and the second anode groove are sealed and closed.

[0009] A plurality of anode plates, a plurality of the anode plates are sequentially laid on the inner walls of the first anode groove and the second anode groove in the circumferential direction;

[0010] A cathode roller is rotatably arranged at opposite sidewalls of the first anode groove, and is spaced apart from the anode plates to form electrolysis zones between the anode plates and the cathode roller.

[0011] Further, the inner walls of the first and second anode grooves are respectively provided with a lower pressing bead and an upper pressing bead close to the groove opening, the top of the lower pressing bead is provided with a sealing ring surrounding the inner side of the first anode groove opening, and the upper part of the sealing ring protrudes from the first anode groove opening, and after the cover is closed, the sealing ring is tightly arranged in the joint of the first and second anode grooves by the pressing effect of the upper and lower pressing beads.

[0012] Further, the top surface of the shell is provided with a first sealing groove surrounding the outer side of the first anode groove opening, and the bottom surface of the cover is provided with a second sealing groove surrounding the outer side of the second anode groove opening, and after the cover is closed, the first and second sealing grooves are mutually closed to form an annular sealing cavity, the sealing cavity is connected with an external vacuum device, and after the sealing cavity is vacuumized, the sealing ring is tightly arranged in the joint of the first and second anode grooves under the action of negative pressure.

[0013] Further, the upper end surface of the first sealing groove and the lower end surface of the second sealing groove are respectively provided with sealing pads, the sealing pads abut each other after the cover is closed, and the sealing pads are tightly arranged under the action of negative pressure after the sealing cavity is vacuumized.

[0014] Further, the curvature of the two inner walls defining the second anode groove is B, and B ranges from 15° to 75°.

[0015] Further, each of the anode plates is provided with a conductive interface on one side close to the first anode groove or the second anode groove, each of the anode plates is connected with an independent DC power supply and adjusts the input current through the independent DC power supply.

[0016] Further, the inner walls of the first and second anode grooves are respectively provided with conductive through holes corresponding to the positions of the conductive interfaces.

[0017] Further, the cover is provided with liquid outlet channels on the two inner walls close to the discharge opening and communicating to the outer surface of the cover.

[0018] The beneficial effects of the present application are:

[0019] The high-impregnation-rate electrolytic copper foil production device provided by the application comprises a shell with a first anode groove opened on the top surface, a cover body capable of being sealed and arranged on the top of the shell, and a second anode groove opened on the bottom surface of the cover body, and the first anode groove and the second anode groove are arranged in a sealed manner after the cover body is closed. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 An explosion structure diagram of the high-impregnation-rate electrolytic copper foil production device provided by the application.

[0022] Figure 2 A three-dimensional structure diagram of the shell provided by the application.

[0023] Figure 3 A three-dimensional bottom view structure diagram of the cover body provided by the application.

[0024] Figure 4 A cross-sectional structure diagram of the high-impregnation-rate electrolytic copper foil production device provided by the application after the cover body is opened.

[0025] Figure 5 A three-dimensional structure diagram of the shell provided by the application. Figure 4 A local enlarged diagram of position A in the shell. DETAILED DESCRIPTION

[0026] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0027] In the description of the present application, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0028] Referring to Figures 1-5 As shown in the drawings, a high-impregnation-rate electrolytic copper foil foiling device comprises:

[0029] A shell 1 is provided with an arc-shaped first anode groove 11 on the top surface, and a liquid inlet channel 12 is provided on the groove bottom of the first anode groove 11. In this embodiment, the cross section of the first anode groove 11 is semicircular, and in other embodiments, the cross section of the first anode groove 11 can be adjusted adaptively according to specific conditions.

[0030] A cover 2 is provided on the top of the shell 1. In this embodiment, one end of the cover 2 is hinged to the shell 1, and the other end is locked to the shell 1 by a lock catch. In other embodiments, the cover 2 and the shell 1 can also be sealed by other existing cover locking methods, which are not specifically limited here. An arc-shaped second anode groove 21 is provided on the bottom surface of the cover 2. In this embodiment, the cross section of the second anode groove 21 is semicircular, and in other embodiments, the cross section of the second anode groove 21 can be adjusted adaptively according to specific conditions. A discharge opening 22 is provided on the groove bottom of the second anode groove 21, which is communicated to the upper end surface of the cover 2, so that the copper foil attached to the surface of the cathode roller by electrolysis can be stripped and taken out through the discharge opening 22. After the cover 2 is closed, the first anode groove 11 and the second anode groove 21 are sealed and closed.

[0031] A plurality of anode plates 3, connected to the positive pole of the power supply, are sequentially laid on the inner walls of the first anode groove 11 and the second anode groove 21 in the circumferential direction; the anode plates 3 can be made of special insoluble anode materials, such as lead-antimony alloy or lead-silver alloy anodes, or DSA titanium anodes, etc.

[0032] A cathode roller 4, connected to the negative pole of the power supply, is a titanium roller, and the two ends thereof are rotatably arranged on the opposite side walls of the first anode groove 11; specifically, in the embodiment, the two ends of the cathode roller 4 are respectively provided with rotating shafts, and the opposite side walls of the first anode groove 11 and the second anode groove 21 are respectively provided with shaft holes matched with the rotating shafts; in other embodiments, the cathode roller 4 can also be rotatably arranged on the opposite side walls of the first anode groove 11 through other existing connection modes, such as ball bearing connection, etc., and the cathode roller 4 is arranged in a spaced manner with the plurality of anode plates 3, and the plurality of anode plates 3 and the cathode roller 4 form an electrolysis area 5, electrolyte is introduced into the electrolysis area 5 through the liquid inlet channel 12, an electric field is formed in the electrolysis area 5, and copper ions migrate to the surface of the cathode roller 4 and deposit to form copper foil under the action of the electric field; in the embodiment, the electrolyte is a copper sulfate solution.

[0033] Referring to Figure 1 , the cathode roller 4 includes a roller surface 41 for foil production and a side part 42 arranged on both sides of the roller surface 41; the surface roughness of the roller surface 41 satisfies Ra<0.2mm and Rz<1.5mm; and the side part 42 is formed through hydrogen peroxide oxidation treatment. By finely grinding the roller surface 41, the pinholes on the surface of the copper foil produced rapidly can be effectively eliminated. In addition, the treatment of the side part 42 is also conducive to solving the problem that the copper foil produced rapidly is prone to breaking during stripping. The width of the side part 42 is preferably 20-30mm. In one of the embodiments, the width of the side part 42 is about 25mm.

[0034] The cathode roller 4 can be prepared by the following method:

[0035] S11, the surface of the cathode roller 4 is divided into a roller surface 41 for foil production and a side part 42 arranged on both sides of the roller surface 41;

[0036] S12, the roller surface 41 is ground using a grinding wheel, so that the roughness of the roller surface 41 satisfies Ra<0.2mm and Rz<1.5mm;

[0037] S13, the side part 42 is treated with hydrogen peroxide oxidation.

[0038] Further, in step S12, the roll surface 41 is ground with 80#, 120#, 220#, 320#, 400#, 600# and 800# grinding wheels in sequence, so that the roughness of the roll surface 41 satisfies: Ra < 0.2 mm, Rz < 1.5 mm.

[0039] Further, in step S13, the step of oxidizing the edge portion 42 with hydrogen peroxide is: wiping and infiltrating the edge portion 42 with hydrogen peroxide.

[0040] Through the above structure, the traditional semi-circular anode groove is expanded to a larger-than-semi-circular anode groove combined by the first anode groove and the second anode groove, the area of electrolytic contact between the anode plate and the cathode roller through the electrolyte is increased, the area of the copper foil generated by electrolysis and attached to the surface of the cathode roller is increased, and the production efficiency of the whole foil production device is improved. The cathode roller can be taken out or installed by opening the cover, so that the cathode roller can be replaced, repaired and cleaned. At the same time, the area of the cathode roller immersed in the electrolyte is increased, the immersion rate of the cathode roller is improved, the surface oxidation of the cathode roller caused by long-term exposure to air is avoided, and the service life of the cathode roller is prolonged.

[0041] Specifically, in the embodiment, the sealing structure between the first anode groove 11 and the second anode groove 21 is set as follows: the inner walls of the first anode groove 11 and the second anode groove 21 are respectively provided with a lower pressing bead 111 and an upper pressing bead 211 close to the groove opening, the top of the lower pressing bead 111 is provided with a sealing ring 112 around the inner side of the groove opening of the first anode groove 11, and the upper part of the sealing ring 112 protrudes from the groove opening of the first anode groove 11. After the cover 2 is closed, the sealing ring 112 is attached to the inner side of the joint of the first anode groove 11 and the second anode groove 21 by the pressing effect of the upper pressing bead 211 and the lower pressing bead 111. In the embodiment, the material of the sealing ring 112 is elastic rubber. In other embodiments, the material of the sealing ring 112 can also be other types of elastic materials, such as silica gel, etc. Thus, the first anode groove 11 and the second anode groove 21 are sealed and closed, and when the electrolyte is introduced through the liquid inlet channel 12, the electrolyte will not flow out from the joint between the first anode groove 11 and the second anode groove 21, avoiding unnecessary loss and increasing production cost.

[0042] In order to further strengthen the sealing effect of the joint between the first anode groove 11 and the second anode groove 21, a first sealing groove 13 is formed on the top surface of the shell 1 around the outer side of the slot of the first anode groove 11, and a second sealing groove 23 is formed on the bottom surface of the cover 2 around the outer side of the slot of the second anode groove 21. After the cover 2 is closed, the first sealing groove 13 and the second sealing groove 23 are closed to form an annular sealing cavity 6. The sealing cavity 6 is connected to an external vacuum device. After the sealing cavity 6 is evacuated, the sealing ring 112 is tightly sealed on the inner side of the joint between the first anode groove 11 and the second anode groove 21 under the action of negative pressure. Therefore, through the arrangement of the sealing cavity 6, the sealing ring 112 can be always tightly sealed on the inner side of the joint between the first anode groove 11 and the second anode groove 21 during the operation of the foil production device, avoiding the situation that the sealing ring 112 cannot seal the joint after being oxidized due to long-term immersion in the electrolyte, causing the electrolyte to overflow. Therefore, even if the sealing ring 112 loses some elasticity, it will not greatly affect the production efficiency of the foil production device. The staff only needs to check the sealing ring 112 regularly and replace it if necessary.

[0043] In order to further strengthen the sealing effect of the joint between the first anode groove 11 and the second anode groove 21, the upper end surface of the first sealing groove 13 and the lower end surface of the second sealing groove 23 are respectively provided with sealing pads 7. In this embodiment, the material of the sealing pads 7 is elastic rubber. In other embodiments, the material of the sealing pads 7 can also be other types of elastic materials, such as silicone. After the cover 2 is closed, the sealing pads 7 abut against each other. After the sealing cavity 6 is evacuated, the sealing pads 7 are tightly sealed under the action of negative pressure. Therefore, through the double sealing of the sealing ring 112 and the sealing pads 7, the sealing effect between the first anode groove 11 and the second anode groove 21 after the cover is closed is ensured, and when the electrolyte is introduced through the liquid inlet channel 12, the electrolyte will not flow out from the joint between the first anode groove 11 and the second anode groove 21, avoiding unnecessary loss and increasing production cost.

[0044] In order to make the electrolyte flow under the driving of the cathode roller in the anode groove formed by the first anode groove 11 and the second anode groove 21, the two side inner wall arcs of the second anode groove 21 are defined as B, and the range of B is 15°-75°. The thickness and area density of the copper foil produced by electrolysis are affected by the concentration of copper ions in the electrolyte and the rotating speed of the cathode roller 4. In the embodiment, the two side inner wall arcs of the second anode groove 21 are set as 45°, so that the electrolyte can have sufficient flowability under the driving of the self-rotation of the cathode roller 4, the copper ions in the electrolyte are uniformly dispersed, the production efficiency of the copper foil is improved, and the production quality of the copper foil is ensured. In other embodiments, the range and specific setting value of B can be adjusted according to the actual production.

[0045] Further, one side of each of the anode plates 3 close to the first anode groove 11 or the second anode groove 21 is provided with a conductive interface, and each of the anode plates 3 is connected to an independent direct current power supply and adjusts the input current through the independent direct current power supply.

[0046] Further, the inner walls of the first anode groove 11 and the second anode groove 21 are respectively provided with conductive through holes corresponding to the positions of the conductive interfaces.

[0047] In order to make the electrolyte flow under the driving of the cathode roller in the anode groove formed by the first anode groove 11 and the second anode groove 21, the two side inner wall arcs of the second anode groove 21 are defined as B, and the range of B is 15°-75°. The thickness and area density of the copper foil produced by electrolysis are affected by the concentration of copper ions in the electrolyte and the rotating speed of the cathode roller 4. In the embodiment, the two side inner wall arcs of the second anode groove 21 are set as 45°, so that the electrolyte can have sufficient flowability under the driving of the self-rotation of the cathode roller 4, the copper ions in the electrolyte are uniformly dispersed, the production efficiency of the copper foil is improved, and the production quality of the copper foil is ensured. In other embodiments, the range and specific setting value of B can be adjusted according to the actual production.

[0048] Working principle:

[0049] S21, install the cathode roller 4 into the first anode groove, and cover the cover body 2;

[0050] S22, vacuumize the sealed cavity 6 through the vacuumizing device, and realize the sealing setting of the joint between the first anode groove 11 and the second anode groove 21 through the double sealing of the sealing ring 112 and the sealing gasket 7;

[0051] S23, introduce the electrolyte into the electrolysis area 5 through the liquid inlet channel 12 until the anode plate 3 at the highest position in the second anode groove is immersed, and make the electrolyte flow out from the liquid outlet channel 24 to realize the circulation of the electrolyte.

[0052] S24, the power is turned on, an electric field is generated in the electrolytic area 5, under the action of the electric field, the cations move to the cathode roller 4, and the anions move to the anode plate 3, Cu 2+ is reduced to Cu by obtaining 2 electrons and is crystallized on the cathode roller 4 to form a copper foil;

[0053] S25, the copper foil on the surface of the cathode roller 4 is stripped through the discharge opening 22, and is continuously wound and collected through the roller, that is, the process of electrolytic copper foil foiling is completed.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-impregnation-rate electrolytic copper foil production apparatus characterized by comprising: The utility model relates to a kind of electrolytic cell, including: Shell (1), top surface is equipped with arc first anode groove (11), the groove bottom of the first anode groove (11) is equipped with liquid inlet passage (12); Cover (2), sealing cover is equipped in the top of shell (1), the bottom surface of cover (2) is equipped with arc second anode groove (21), the groove bottom of the second anode groove (21) is equipped with discharge opening (22) that is communicated to the upper end surface of cover (2), after cover (2) cover, the first anode groove (11) and second anode groove (21) are sealed cover and set between; The inner wall of the first anode groove (11) and second anode groove (21) is equipped with lower pressing joint (111) and upper pressing joint (211) respectively close to the groove mouth, the top of the lower pressing joint (111) is equipped with ring the sealing ring (112) of the first anode groove (11) groove mouth inside one week; The top surface of shell (1) is equipped with ring the first sealing groove (13) of the first anode groove (11) groove mouth outside one week, the bottom surface of cover (2) is equipped with ring the second sealing groove (23) of the second anode groove (21) groove mouth outside one week, after cover (2) cover, the first sealing groove (13) and second sealing groove (23) are mutually cover and form annular sealing cavity (6), sealing cavity (6) is connected with external vacuum device, after sealing cavity (6) vacuumizing, the sealing ring (112) is sealed and fits in the joint inside of the first anode groove (11) and second anode groove (21) under the action of negative pressure, the upper end surface of the first sealing groove (13) and the lower end surface of the second sealing groove (23) are respectively equipped with sealing pad (7), after cover (2) cover, the sealing pad (7) is mutually abutted, between the sealing pad (7) is sealed and fits under the action of negative pressure after sealing cavity (6) vacuumizing; Several anode plates (3), several the anode plate (3) is sequentially laid on the inner wall of the first anode groove (11) and second anode groove (21) along circumference; Cathode roller (4), two ends are rotationally arranged with the opposite side wall of the first anode groove (11) respectively, and the cathode roller (4) is spaced apart from several the anode plate (3), and several the anode plate (3) and the cathode roller (4) form electrolytic zone (5) between.

2. An electrolytic copper foil production apparatus with high infusion rate according to claim 1, wherein The upper part of the sealing ring (112) protrudes from the groove mouth of the first anode groove (11), and after the cover (2) is closed, the sealing ring (112) is fitted in the joint inside of the first anode groove (11) and the second anode groove (21) by the pressing effect of the upper pressing joint (211) and the lower pressing joint (111).

3. The high-throwing power electro-deposited copper foil production apparatus of claim 1, wherein, The curvature of the two side inner walls of the second anode groove (21) is defined as B, and B ranges from 15° to 75°.

4. The high-throwing power electro-deposited copper foil production apparatus of claim 1, wherein, Each of the anode plates (3) has a conductive interface on one side close to the first anode groove (11) or the second anode groove (21), and each of the anode plates (3) is connected to an independent DC power supply and adjusts the input current through the independent DC power supply.

5. An electrolytic copper foil production apparatus with high infusion rate according to claim 4, wherein The inner wall of the first anode groove (11) and the second anode groove (21) is respectively provided with a conductive through hole corresponding to the position of the conductive interface.

6. A high-throwing power electro-deposited copper foil production apparatus as claimed in claim 1, wherein, The cover body (2) is provided with a liquid outlet channel (24) communicated to the outer surface of the cover body (2) on the inner wall of the two sides close to the discharge opening (22).

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