Continuous preparation device of metal composite foil for electromagnetic shielding

Abstract

A continuous preparation device for metal composite foils for electromagnetic shielding relates to the technical field of electromagnetic shielding material preparation and comprises a pretreatment device, a flowing electroplating bath, a post-treatment device and a copper foil traction mechanism. The copper foil is driven by the traction mechanism to be sequentially subjected to the working procedures of pretreatment, electroplating and aftertreatment. The anode plates mounted in the flowing electroplating bath in parallel at intervals are formed by combining nickel plates and iron plates, and copper foils penetrate through gaps of the anode plates in an S-shaped route, so that uniform deposition of a plating layer is ensured. According to the utility model, the continuous production of the metal composite foil for electromagnetic shielding is realized, and the production efficiency and the coating quality are obviously improved. Compared with traditional intermittent production, the device has the advantages that the idle time of equipment is shortened, the operation complexity is reduced, and the production cost is reduced. And meanwhile, through cyclic utilization of the electroplating liquid and reasonable design of the anode plate, the uniformity and stability of a plating layer are guaranteed, and the electromagnetic shielding performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic shielding material preparation, especially refers to a kind of continuous preparation device of metal composite foil for electromagnetic shielding. BACKGROUND

[0002] With the progress of technology, the integration of components in electronic products and communication wave frequency are constantly improved, and the superposition of the two leads to the electromagnetic interference phenomenon in electronic products more and more serious, and higher requirements are put forward for the quality and quantity of electromagnetic shielding film. At present, the preparation of electromagnetic shielding material is mostly by electroplating process, but the traditional electroplating device has the following problems:

[0003] Most of the existing electroplating devices are intermittent production, which cannot realize continuous operation, resulting in low production efficiency and difficulty in meeting large-scale production demand. Moreover, the traditional electroplating device has deficiencies in plating layer uniformity and quality control, which is prone to problems such as uneven plating layer thickness and surface defects, affecting the electromagnetic shielding performance. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of continuous preparation device of metal composite foil for electromagnetic shielding, to improve production efficiency and product quality, reduce production cost, meet the large-scale demand in actual production.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a kind of continuous preparation device of metal composite foil for electromagnetic shielding, comprising:

[0006] A pretreatment device is used for surface pretreatment of copper foil;

[0007] A flow electroplating tank is used for depositing nickel-iron alloy plating layer on the surface of copper foil, and a plurality of anode plates are installed in parallel and spaced apart in the flow electroplating tank, and the anode plates are composed of nickel plate and iron plate;

[0008] A post-treatment device is used for cleaning and drying treatment of copper foil after electroplating;

[0009] A copper foil traction mechanism is used to pull the copper foil through the pretreatment device, flow electroplating tank and post-treatment device in sequence, to realize continuous preparation of copper foil;

[0010] When the copper foil enters the flow electroplating tank, it passes through the space between the adjacent two anode plates one by one in an S-shaped route.

[0011] Preferably, the pretreatment device includes an acid pickling tank for removing copper oxide layer on the surface of copper foil and a cleaning tank for removing residual acid pickling solution on the surface of copper foil after acid pickling.

[0012] More preferably, the post-processing device comprises a water spraying component for removing residual plating solution on the surface of the metal foil after plating and an air drying component for drying the metal foil after plating.

[0013] More preferably, the copper foil traction mechanism comprises an unwinding component for releasing the copper foil from a roll, a conductive component in close contact with the copper foil for applying an electric current to the copper foil, a traction component for pulling the copper foil to prevent it from being folded, and a winding component driven by a motor to wind the metal foil after plating and move the copper foil.

[0014] More preferably, the flow plating tank comprises a plating tank and an overflow tank, the bottom of the plating tank continuously enters the plating solution, and the top of the plating tank enters the plating solution into the overflow tank through overflow, and the electrolyte in the overflow tank is sent back into the plating tank through a recovery mechanism.

[0015] More preferably, the bottom of the plating tank is provided with a liquid inlet pipe, a plurality of liquid distribution pipe openings are distributed on the pipe body of the liquid inlet pipe, the liquid inlet pipe is connected to a filter through a liquid inlet pipe main pipe, the filter is connected to a liquid pump, the liquid pump is connected to a liquid storage tank, one end of the liquid storage tank is connected to the overflow tank, a plating tank liquid inlet valve is provided between the liquid inlet pipe and the filter, and a plating tank liquid outlet valve is provided between the overflow tank and the liquid storage tank.

[0016] More preferably, the overflow tank is arranged in close proximity to the plating tank, one side of the plating tank is higher than the overflow tank by 5-10 cm, and a notch is provided along the side of the plating tank for the plating solution to overflow into the overflow tank.

[0017] More preferably, the anode plate is detachably installed in the clamping groove of the left and right inner walls of the plating tank, the lower part of the anode plate extends into the electrolyte, a plurality of traction components are arranged at intervals above the plating tank and at the inner bottom of the plating tank, and the copper foil passes through the interval area between adjacent anode plates under the traction of the plurality of traction components, so that the copper foil and the anode plate are alternately and spacedly arranged in the plating tank.

[0018] The present application realizes continuous production of the metal composite foil for electromagnetic shielding through the organic combination of the pre-treatment device, the flow plating tank, the post-processing device and the copper foil traction mechanism. Compared with the traditional intermittent production method, the production efficiency is significantly improved, the production cost is reduced, and the demand for large-scale production can be better met. The design of the parallel and spaced anode plates in the flow plating tank, combined with the guiding effect of the copper foil traction mechanism, ensures that the copper foil can uniformly contact the plating solution and the anode during plating. This structural design effectively avoids problems such as uneven plating layer thickness and surface defects, significantly improves the quality and consistency of the plating layer, and thus improves the electromagnetic shielding performance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Structure diagram of the pre-treatment device in the embodiment;

[0020] Figure 2 Structure diagram of the flow plating tank and post-treatment device in the embodiment;

[0021] Figure 3 Structure diagram of the flow plating tank in the embodiment;

[0022] Figure 4 Structure diagram of the anode plate in the embodiment;

[0023] Figure 5 Structure diagram of the plating tank and overflow tank in the embodiment.

[0024] In the figure:

[0025] 1 - copper foil 2 - anode plate 3 - pickling tank

[0026] 4 - cleaning tank 5 - water spraying part 6 - air drying part

[0027] 7 - unwinding part 8 - conductive part 9 - traction part

[0028] 10 - tension adjusting device 11 - winding part 12 - plating tank

[0029] 13 - overflow tank 14 - clamping groove 15 - liquid inlet pipe

[0030] 16 - liquid outlet pipe 17 - liquid inlet pipe main pipe 18 - filter

[0031] 19 - liquid pump 20 - liquid storage pool 21 - plating tank liquid inlet valve

[0032] 22 - plating tank liquid outlet valve 23 - cleaning tank liquid inlet

[0033] 24 - cleaning tank liquid outlet 25 - pickling tank liquid inlet

[0034] 26 - pickling tank liquid outlet 27 - insulating plate 28 - iron plate

[0035] 29 - nickel plate 30 - cleaning liquid collecting pool. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in combination with the embodiments and the accompanying drawings. The content mentioned in the embodiments is not a limitation of the present application.

[0037] It should be noted in advance that, in this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them.

[0038] like Figures 1 to 3 As shown, a continuous fabrication apparatus for electromagnetic shielding metal composite foil includes:

[0039] A pretreatment device is used to pretreat the surface of copper foil 1;

[0040] A flowing electroplating tank is used to deposit a nickel-iron alloy coating on the surface of copper foil 1. Multiple anode plates 2 are installed in parallel at intervals inside the flowing electroplating tank. The anode plates 2 are composed of nickel plates and iron plates.

[0041] Post-processing equipment is used to clean and dry the electroplated copper foil 1;

[0042] A copper foil traction mechanism is used to traction copper foil 1 through the pretreatment device, the flowing electroplating tank and the posttreatment device in sequence to realize the continuous preparation of copper foil 1;

[0043] When the copper foil 1 enters the flowing electroplating tank, it passes through the gap between two adjacent anode plates 2 one by one in an S-shaped path.

[0044] In the above structure, the pretreatment device includes an acid pickling tank 3 for removing the copper oxide layer on the surface of the copper foil 1 and a cleaning tank 4 for removing the acid pickling solution remaining on the surface of the copper foil 1 after acid pickling.

[0045] The post-processing device includes a water spraying component 5 for removing residual electroplating solution from the surface of the electroplated metal foil and an air drying component 6 for drying the electroplated metal foil. A cleaning solution collection tank 30 is also provided below the water spraying component 5.

[0046] The copper foil traction mechanism includes an unwinding component 7, a conductive component 8, a traction component 9, a tension adjusting device 10, and a winding component 11. The unwinding component 7 releases the rolled copper foil 1. The conductive component 8 is in close contact with the copper foil 1 to apply current to the copper foil 1. The traction component 9 pulls the copper foil 1 to prevent it from folding. The winding component 11 is driven by a motor to wind up the electroplated metal foil and move the copper foil 1. The tension adjusting device 10 can use a conventional adjusting roller to adjust the tension of the roll.

[0047] The flow plating tank comprises a plating tank 12 and an overflow tank 13, the bottom of the plating tank 12 continuously enters the plating solution and the top of the plating tank 12 enters the plating solution into the overflow tank 13 by overflow, and the electrolyte in the overflow tank 13 is sent into the plating tank 12 by a recycling mechanism.

[0048] The bottom of the plating tank 12 is provided with a liquid inlet pipe 15, a plurality of liquid distribution pipe openings 16 are distributed on the pipe body of the liquid inlet pipe 15, the liquid inlet pipe 15 is connected with a filter 18 through a liquid inlet pipe main pipe 17, the filter 18 is connected with a liquid pump 19, the liquid pump 19 is connected with a liquid storage tank 20, one end of the liquid storage tank 20 is connected with the overflow tank 13, a plating tank liquid inlet valve 21 is arranged between the liquid inlet pipe 15 and the filter 18, and a plating tank liquid outlet valve 22 is arranged between the overflow tank 13 and the liquid storage tank 20. The overflow tank 13 is arranged close to the plating tank 12, one side of the plating tank 12 is higher than the overflow tank 13 by 5-10 cm, and a notch is arranged on the side of the plating tank 12 to allow the plating solution to overflow into the overflow tank 13. Through the reasonable design of the flow plating tank, the plating solution can be stably circulated, which is beneficial to the stability of the metal composite foil product.

[0049] The anode plate 2 is detachably installed in the clamping groove 14 of the inner wall of the plating tank 12 on both sides, and the lower part of the anode plate 2 extends into the electrolyte. A plurality of traction components 9 are arranged at intervals above the plating tank 12 and at the inner bottom of the plating tank 12, and the copper foil 1 passes through the interval area between adjacent anode plates 2 under the traction of the plurality of traction components 9, so that the copper foil 1 and the anode plate 2 are alternately and spaced arranged in the plating tank 12. Those skilled in the art should know that the structure of the anode plate 2 can be directly made of nickel-iron alloy material, or the iron plate 28 and the nickel plate 29 can be combined together to form the anode plate 2 under the premise of saving cost, as shown in Figure 4 The iron plate 28 and the nickel plate 29 are wrapped by the insulating plate 27 around the upper and lower and left and right four sides, and the top end is connected with the conductive component through the wire or the metal conductive sheet, then the anode plate 2 is inserted into the clamping groove 14, the insulating plate 27 can ensure that the anode plate 2 and the plating tank 12 are insulated to avoid affecting the plating process, after being inserted into the clamping groove 14, the anode plate 2 can extend into the plating solution and keep the top end thereof above the plating tank 12, at this time, the front and back surfaces of the anode plate 2 can contact the plating solution.

[0050] The process flow of preparing the metal composite foil for electromagnetic shielding by using the metal composite foil continuous preparation device provided by the above embodiment is as follows:

[0051] S1: preparation stage, the copper foil 1 is pulled from the unwinding component 7 to the winding component 11 through the traction component 9, the plating solution preheated to the set temperature is injected into the flow plating tank, the inflow flow rate of the plating solution in the plating tank 12 is adjusted to the set value, the motor of the winding component 11 is turned on, and the moving speed of the copper foil 1 is adjusted to the set value.

[0052] S2: Electroplating stage: A set current value is supplied to the current loop composed of copper foil 1 and anode plate 2 through conductive component 8, so that the thickness of the plating layer formed on the surface of copper foil 1 immersed in electroplating solution reaches the set value.

[0053] S3: Rewinding stage: After electroplating, the metal composite foil is washed with pure water and dried with hot air in sequence, and then rolled up by the rewinding component 11.

[0054] S4: Annealing stage: The wound metal composite foil is sent to a vacuum annealing furnace for annealing to relieve stress in the metal electroplating layer and remove hydrogen from the plating layer.

[0055] This invention enables the efficient production of metal composite foil for electromagnetic shielding using a continuous production apparatus. The apparatus mainly includes a pretreatment unit, a flowing electroplating tank, a post-treatment unit, and a copper foil traction mechanism. Driven by the traction mechanism, the copper foil sequentially undergoes pretreatment, electroplating, and post-treatment processes. The anode plates, composed of nickel and iron plates, are installed parallel and spaced apart within the flowing electroplating tank. The copper foil passes through the gaps between the anode plates in an S-shaped path, ensuring uniform deposition of the plating layer. The electroplating solution enters the electroplating tank through an inlet pipe and is recycled through an overflow tank, ensuring the stability and uniformity of the plating solution. This continuous process achieves efficient and uniform preparation of a nickel-iron alloy plating layer on the copper foil surface, while simultaneously improving production efficiency and product quality.

[0056] This device enables continuous production of metal composite foil for electromagnetic shielding, significantly improving production efficiency and coating quality. Compared to traditional intermittent production, it reduces equipment downtime and operational complexity, lowering production costs. Simultaneously, the recycling of the electroplating solution and the rational design of the anode plates ensure the uniformity and stability of the coating, enhancing electromagnetic shielding performance. Furthermore, the automated traction mechanism and stable production process reduce manual intervention, further improving production reliability and flexibility.

[0057] To facilitate understanding by those skilled in the art of the improvements of this utility model compared to the prior art, some of the accompanying drawings and descriptions of this utility model have been simplified. The above embodiments are preferred implementations of this utility model. In addition, this utility model can be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A continuous preparation apparatus for metal composite foil for electromagnetic shielding, characterized in that, include: A pretreatment device for surface pretreatment of copper foil (1); A flowing electroplating tank is used to deposit a nickel-iron alloy coating on the surface of copper foil (1). Multiple anode plates (2) are installed in parallel at intervals in the flowing electroplating tank. The anode plates (2) are composed of nickel plates and iron plates. A post-processing device is used to clean and dry the electroplated copper foil (1); A copper foil traction mechanism is used to traction copper foil (1) through the pretreatment device, the flowing electroplating tank and the posttreatment device in sequence to realize the continuous preparation of copper foil (1); When the copper foil (1) enters the flowing electroplating tank, it passes through the gap between two adjacent anode plates (2) in an S-shaped path.

2. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 1, characterized in that: The pretreatment device includes an acid pickling tank (3) for removing the copper oxide layer on the surface of the copper foil (1) and a cleaning tank (4) for removing the acid pickling liquid remaining on the surface of the copper foil (1) after acid pickling.

3. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 1, characterized in that: The post-processing device includes a water spraying component (5) for removing residual electroplating solution from the surface of the electroplated metal foil and an air drying component (6) for drying the electroplated metal foil.

4. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 1, characterized in that: The copper foil traction mechanism includes an unwinding component (7), a conductive component (8), a traction component (9), a tension adjusting device (10), and a winding component (11). The unwinding component (7) is used to release the rolled copper foil (1). The conductive component (8) is in close contact with the copper foil (1) to apply current to the copper foil (1). The traction component (9) is used to traction the copper foil (1) to avoid folding the copper foil (1). The winding component (11) is driven by a motor to wind up the electroplated metal foil and move the copper foil (1).

5. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 4, characterized in that: The flowing electroplating tank includes an electroplating tank (12) and an overflow tank (13). Electroplating liquid continuously enters the bottom of the electroplating tank (12) and overflows into the overflow tank (13) at the top. The electrolyte in the overflow tank (13) is recycled back into the electroplating tank (12) through a recycling mechanism.

6. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 5, characterized in that: The bottom of the electroplating tank (12) is provided with an inlet pipe (15), and multiple liquid outlets (16) are distributed on the pipe body of the inlet pipe (15). The inlet pipe (15) is connected to a filter (18) through an inlet pipe main (17). The filter (18) is connected to a liquid pump (19). The liquid pump (19) is connected to a storage tank (20). One end of the storage tank (20) is connected to an overflow tank (13). An electroplating tank inlet valve (21) is provided between the inlet pipe (15) and the filter (18). An electroplating tank outlet valve (22) is provided between the overflow tank (13) and the storage tank (20).

7. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 6, characterized in that: The overflow trough (13) is set close to the electroplating tank (12). One side of the electroplating tank (12) is 5-10cm higher than the overflow trough (13), and the upper edge of this side of the electroplating tank (12) is provided with a notch for the electroplating solution to overflow into the overflow trough (13).

8. The continuous preparation apparatus for electromagnetic shielding metal composite foil according to claim 5, characterized in that: The anode plate (2) is detachably installed in the slots (14) on the inner walls of the left and right sides of the electroplating tank (12), and the lower part of the anode plate (2) extends into the electrolyte. Multiple traction components (9) are provided at intervals above the electroplating tank (12) and at the bottom of the electroplating tank (12). The copper foil (1) passes through the interval area of ​​the adjacent anode plates (2) in sequence under the traction of the multiple traction components (9) so that the copper foil (1) and the anode plate (2) are alternately arranged in the electroplating tank (12).

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