A segmented electrolytic activation and masking fixture for continuous electroplating
Patent Information
- Application Number
- CN202522276836.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-10-28
AI Technical Summary
[0004]然而，这种均一活化的方式无法满足结构或材质不对称工件的处理需求；使得当对于不锈钢与铜的复合材料以及单侧存在焊渣和另一侧仅为轻微氧化物的工件，其不同表面对活化强度的要求截然不同，若同样施加强电流，则可能导致基材发生过腐蚀，影响产品质量与性能，为此，我们提出一种用于连续电镀的分段式电解活化加遮蔽的治具
本实用新型通过内子槽沿产品移动方向划分非屏蔽电镀区域和屏蔽电镀区，非屏蔽电镀区域通过两个第一石墨板对产品两端电镀面进行正常电镀，屏蔽电镀区则利用阳极遮蔽板遮蔽产品待弱活化表面的电流，仅通过第二石墨板对产品一端电镀面电镀；这种分段式设计能精准匹配产品不同表面的电镀需求，避免待弱活化表面过度活化或电镀，有效解决传统治具电镀均匀性差、无法针对性处理不同区域的问题，显著提升产品电镀的精准度，保障产品电镀质量符合工艺标准。
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Figure CN224858471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electroplating technology, specifically a segmented electrolytic activation and masking fixture for continuous electroplating. Background Technology
[0002] Electroplating is a process that uses the principle of electrolysis to deposit a thin layer of metal or alloy on the surface of metal or other material parts. This process can give the substrate surface functions such as corrosion resistance, wear resistance, conductivity, reflectivity and decoration, and is widely used in electronics, aerospace, automobiles and daily hardware.
[0003] In continuous electroplating processes, electrolytic activation is a crucial pretreatment step, the effect of which directly determines the adhesion between the subsequent plating layer and the substrate, as well as the quality of the final product. Currently, the activation fixtures commonly used in the industry are mostly of the anode-unshielded type. Under this structure, when the product passes through the activation tank continuously, both its front and back surfaces are exposed to the same electric field environment, resulting in a basically consistent activation current density on both sides and a uniform degree of activation.
[0004] However, this uniform activation method cannot meet the processing requirements of workpieces with asymmetrical structures or materials. This means that for stainless steel and copper composite materials, as well as workpieces with weld slag on one side and only slight oxides on the other, the activation intensity requirements for different surfaces are completely different. If the same strong current is applied, it may cause over-corrosion of the substrate, affecting product quality and performance. To address this, we propose a segmented electrolytic activation and masking fixture for continuous electroplating. Summary of the Invention
[0005] The purpose of this invention is to provide a segmented electrolytic activation and shielding fixture for continuous electroplating, so as to solve the problems mentioned in the background art.
[0006] The objective of this utility model can be achieved through the following technical solutions: A segmented electrolytic activation and shielding fixture for continuous electroplating includes: an outer sub-tank, an inner sub-tank, a product, and a rectifier body. The inner sub-tank is mounted at the center of the inner side of the outer sub-tank, and the product is mounted at the center of the inner sub-tank. At least one unshielded electroplating area and one shielded electroplating area are arranged along the product's movement direction. The unshielded electroplating area includes two first graphite plates, which are respectively fixedly mounted on the front and rear inner walls of the inner sub-tank for electroplating the electroplated surfaces at both ends of the product. The shielded electroplating area includes a second graphite plate and an anode shielding plate. The second graphite plate is fixedly mounted on the rear inner wall of the inner sub-tank for electroplating one end of the product, and the anode shielding plate is fixedly mounted on the front inner wall of the inner sub-tank for shielding the current flowing through the product.
[0007] Preferably, a plurality of support rods are fixedly installed at equal intervals on the inner side of the outer sub-slot near the upper end of the inner sub-slot. Each support rod has a bracket rod fixedly installed at its upper end, and each bracket rod has a positioning guide roller rotatably installed at its lower end. Each positioning guide roller is equipped with a product. An anode conductive mechanism is fixedly installed at the upper end of each bracket rod, and an anode wire is fixedly installed on the inner side of each anode conductive mechanism.
[0008] Preferably, weirs are symmetrically installed at both ends of the inner sub-slot, and a number of fixing rods are fixedly installed at equal intervals along the product movement direction on the inner sidewall of the inner sub-slot. A cathode wire is symmetrically fixedly installed at the center of one end of each fixing rod, and an independent first graphite plate and a second graphite plate are fixedly installed on one side of each fixing rod.
[0009] Preferably, both the first graphite plate and the second graphite plate are cathode conductive components, and a plurality of the first graphite plates and the second graphite plates are distributed at intervals along the transmission direction of the product. The first graphite plate and the second graphite plate each correspond to an independent rectifier body, and each of the first graphite plate and the second graphite plate is electrically connected to an independent rectifier body through an independent cathode wire; the anode conductive mechanism is electrically connected to the rectifier body through an anode wire.
[0010] Preferably, a conductive water jet is fixedly installed between the weir and the anode conductive mechanism, and the conductive water jet is used to spray activation liquid into the area between the product and the first graphite plate and the second graphite plate.
[0011] Preferably, the conductive water jet outlet direction faces the activation surface of the product, a filter plate is installed on the inner side of the outer sub-tank near the lower end of both ends of the inner sub-tank, and the positioning guide rollers are symmetrically arranged along the product conveying direction. The positioning guide rollers are used to limit the position of the product during the electrolytic activation process.
[0012] The beneficial effects of this utility model are: This invention divides the product's electroplating area into an unshielded electroplating area and a shielded electroplating area along the product's movement direction using an inner sub-tank. In the unshielded electroplating area, two first graphite plates are used to perform normal electroplating on both ends of the product's electroplating surface. In the shielded electroplating area, an anode shielding plate is used to shield the current on the surface of the product to be weakened and activated, and only one end of the product's electroplating surface is electroplated using a second graphite plate. This segmented design can accurately match the electroplating requirements of different surfaces of the product, avoid over-activation or electroplating of the surface to be weakened and activated, effectively solve the problems of poor electroplating uniformity and inability to specifically treat different areas in traditional fixtures, significantly improve the accuracy of product electroplating, and ensure that the product electroplating quality meets process standards. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an enlarged schematic diagram of the internal structure of the inner sub-slot of this utility model; Figure 3 This is an enlarged schematic diagram of the internal structure of the outer sub-slot of this utility model; Figure 4 This is an enlarged schematic diagram of the positioning mechanism structure of this utility model.
[0014] The following labels are used in the attached diagram: 1. Outer sub-tank; 2. Inner sub-tank; 3. Product; 4. Rectifier body; 5. Unshielded electroplating area; 51. First graphite plate; 6. Shielded electroplating area; 61. Second graphite plate; 62. Anode shielding plate; 7. Support rod; 71. Support rod; 72. Positioning guide roller; 8. Anode conductive mechanism; 81. Anode wire; 9. Fixing rod; 91. Cathode wire; 10. Weir; 11. Conductive water jet; 12. Filter plate. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0016] like Figures 1-4 As shown, a segmented electrolytic activation and shielding fixture for continuous electroplating includes: an outer sub-tank 1, an inner sub-tank 2, a product 3, and a rectifier body 4. The inner sub-tank 2 is installed at the center of the inner side of the outer sub-tank 1, and the product 3 is installed at the center of the inner sub-tank 2. At least one unshielded electroplating area 5 and one shielded electroplating area 6 are arranged along the moving direction of the product 3. The unshielded electroplating area 5 includes two first graphite plates 51, which are respectively fixedly installed on the front and rear inner walls of the inner sub-tank 2 for electroplating the electroplating surfaces at both ends of the product 3. The shielded electroplating area 6 includes a second graphite plate 61 and an anode shielding plate 62. The second graphite plate 61 is fixedly installed on the rear inner wall of the inner sub-tank 2 for electroplating one end of the electroplating surface of the product 3, and the anode shielding plate 62 is fixedly installed on the front inner wall of the inner sub-tank 2 for shielding the current flowing through the surface of the product 3 to be weakly activated.
[0017] In practice, the outer sub-tank 1 serves as the external support frame of the overall fixture, providing installation and protection space for the inner sub-tank 2. The inner sub-tank 2 is the core working area for the electrolytic activation and electroplating of the product 3. Its internal division into an unshielded electroplating area 5 and a shielded electroplating area 6 allows for differentiated treatment of different electroplating requirements on different surfaces of the product 3. The two first graphite plates 51 in the unshielded electroplating area 5 are symmetrically distributed on the front and rear inner walls of the inner sub-tank 2, enabling uniform electroplating of both ends of the product 3 that require normal electroplating. The second graphite plate 61 in the shielded electroplating area 6 is responsible for the electroplating operation on one end of the product 3, while the anode shielding plate 62 precisely blocks the current flow through the surface of the product 3 to be weakly activated through physical shielding, preventing over-activation or electroplating in this area. The rectifier body 4 provides stable current support for the entire electroplating process.
[0018] As a technical optimization of this utility model, a number of support rods 7 are fixedly installed at equal intervals on the inner side of the outer sub-slot 1 near the upper end of the inner sub-slot 2. Each support rod 7 has a bracket rod 71 fixedly installed at its upper end. Each bracket rod 71 has a positioning guide roller 72 rotatably installed at its lower end. Each positioning guide roller 72 is equipped with a product 3. An anode conductive mechanism 8 is fixedly installed at the upper end of the bracket rod 71. An anode wire 81 is fixedly installed on the inner side of the anode conductive mechanism 8.
[0019] In practice, the support rod 7 on the inner side of the outer sub-tank 1, near the upper end of the inner sub-tank 2, serves to support the bracket rod 71, ensuring the stable installation of the entire transmission and conductive components. The bracket rod 71 provides a carrier for the rotational installation of the positioning guide roller 72 and a fixed support point for the anode conductive mechanism 8. The positioning guide roller 72 achieves continuous and stable transmission of the product 3 through rotation, ensuring that the product 3 moves along a preset path during electrolytic activation and electroplating, avoiding positional deviation that affects processing quality. The anode conductive mechanism 8 is a key component for current transmission. The anode wire 81 on its inner side can transmit the current from the rectifier body 4 to the anode conductive mechanism 8, providing anode current for the electroplating process.
[0020] As a technical optimization of this utility model, weirs 10 are symmetrically installed at both ends of the inner sub-slot 2. Several fixing rods 9 are fixedly installed at equal intervals along the moving direction of the product 3 on the inner sidewall of the inner sub-slot 2. A cathode wire 91 is symmetrically fixedly installed at the center of one end of the fixing rod 9. A first graphite plate 51 and a second graphite plate 61 that are independent of each other are fixedly installed on one side of the fixing rod 9.
[0021] In specific implementation, the weirs 10 at both ends of the inner sub-tank 2 are mainly used to control the liquid level of the activation liquid and other liquids in the inner sub-tank 2 to prevent liquid overflow. At the same time, they can also guide and seal the product 3 entering or flowing out of the inner sub-tank 2. The fixing rods 9 installed on the inner sidewall of the inner sub-tank 2 along the moving direction of the product 3 are important fixing carriers for the first graphite plate 51 and the second graphite plate 61. Their equally spaced distribution design can ensure that the first graphite plate 51 and the second graphite plate 61 are evenly arranged on the moving path of the product 3, thereby realizing continuous and uniform electroplating of the product 3. The cathode wire 91 at the center of one end of the fixing rod 9 is used to transmit the cathode current of the rectifier body 4 to the first graphite plate 51 and the second graphite plate 61 to ensure that the cathode conductive parts can work normally. Moreover, the first graphite plate 51 and the second graphite plate 61 are installed independently of each other, which facilitates their maintenance, replacement and independent control.
[0022] As a technical optimization of this utility model, the first graphite plate 51 and the second graphite plate 61 are both cathode conductive components. A plurality of first graphite plates 51 and second graphite plates 61 are distributed at intervals along the transmission direction of product 3. The first graphite plate 51 and the second graphite plate 61 correspond to independent rectifier bodies 4 respectively. Each first graphite plate 51 and the second graphite plate 61 is electrically connected to an independent rectifier body 4 through an independent cathode wire 91. The anode conductive mechanism 8 is electrically connected to the rectifier body 4 through an anode wire 81.
[0023] In practice, the first graphite plate 51 and the second graphite plate 61, as cathode conductive components, are key transmission components for cathode current during the electroplating process. Their spaced distribution along the transmission direction of product 3 ensures that the electroplating surfaces at different positions of product 3 can continuously receive cathode current during the movement of product 3, achieving continuous electroplating. The first graphite plate 51 and the second graphite plate 61 each correspond to an independent rectifier body 4 and are connected by an independent cathode wire 91. This independent control method allows for precise adjustment of the current magnitude of each graphite plate according to the needs of different electroplating areas of product 3, improving electroplating quality and flexibility. The anode conductive mechanism 8 is connected to the rectifier body 4 through the anode wire 81, forming a complete current loop to ensure the smooth progress of the electroplating process.
[0024] As a technical optimization of this utility model, a conductive water jet 11 is fixedly installed between the weir 10 and the anode conductive mechanism 8. The conductive water jet 11 is used to spray activation liquid into the area between the product 3 and the first graphite plate 51 and the second graphite plate 61.
[0025] In practice, the conductive water jet 11 is installed between the weir 10 and the anode conductive mechanism 8. This position ensures that the activated liquid sprayed by the water jet accurately acts on the area between the product 3 and the first graphite plate 51 and the second graphite plate 61. The spraying of the activated liquid can clean and activate the electroplated surface of the product 3, remove surface impurities, and improve the adhesion and uniformity of electroplating. On the other hand, the conductive water jet 11 can also play an auxiliary role in conductivity, enhance the current conduction effect between the product 3 and the cathode conductive component, and further ensure the stability and reliability of the electroplating process.
[0026] As a technical optimization of this utility model, the liquid outlet direction of the conductive water jet 11 is towards the activation surface of the product 3. A filter plate 12 is installed on the inner side of the outer sub-tank 1 near the lower end of the two ends of the inner sub-tank 2. The positioning guide roller 72 is symmetrically arranged along the transmission direction of the product 3. The positioning guide roller 72 is used to limit the position of the product 3 during the electrolytic activation process.
[0027] In practice, the conductive water jet 11 exits towards the activation surface of product 3, allowing the activation liquid to directly act on the surface to be treated, maximizing the activation effect. The filter plate 12, located on the inner side of the outer sub-tank 1 near the lower ends of the inner sub-tank 2, is primarily used to filter the activation liquid and other liquids flowing from the inner sub-tank 2, removing impurities and waste residue generated during electroplating. This facilitates liquid recycling or subsequent treatment, reducing resource waste and environmental pollution. The positioning guide rollers 72 are symmetrically arranged along the conveying direction of product 3. This symmetrical structure limits the position of product 3 from both sides, more precisely defining its position during the electrolytic activation process. This effectively prevents product 3 from shifting or shaking, ensuring that each part of product 3 is accurately aligned with the corresponding graphite plate and activation liquid action area, guaranteeing the quality of electrolytic activation and electroplating.
[0028] Working principle: First, the operator injects sufficient activation liquid into the inner tank 2 inside the outer tank 1. The weirs 10 installed symmetrically at both ends of the inner tank 2 automatically control the level of activation liquid to prevent overflow. At the same time, the filter plates 12 installed on the inner side of the outer tank 1 near the lower ends of the inner tank 2 enter the working state, preparing for subsequent activation liquid filtration. Next, according to the specifications of the surface of the product 3 to be weakly activated, the anode shielding plate 62 is fixed on the inner wall of the front end of the inner tank 2 to ensure that it can accurately correspond to the area of the product 3 to be weakly activated. Then, the transmission system is started to transport the product 3 to the area inside the outer tank 1 near the upper end of the inner tank 2. The support rods 7 fixed at equal intervals on the inner side of the outer tank 1 are equipped with bracket rods 71 at the upper end. The positioning guide rollers 72 installed at the lower end of the bracket rods 71 start to operate. Since the positioning guide rollers 72 are symmetrically arranged along the transmission direction of the product 3, they can stably clamp and guide the product 3, so that the product 3 smoothly enters the working area in the center of the inner tank 2, laying the foundation for subsequent electrolytic activation and electroplating. Secondly, when product 3 reaches the designated position in inner sub-tank 2, rectifier body 4 is activated. On one hand, the anode conductive mechanism 8 fixedly installed at the upper end of the support rod 71 establishes an electrical connection with rectifier body 4 through the inner anode wire 81, transmitting the anode current to the electroplating working area. On the other hand, on one side of the fixing rod 9, which is fixed at equal intervals along the moving direction of product 3 on the inner wall of inner sub-tank 2, there are independent first graphite plates 51 and second graphite plates 61, and both the first graphite plates 51 and the second graphite plates 61 are cathode conductive components, which are symmetrically installed at the center of one end of the fixing rod 9. The cathode wires 91 are connected to the independent rectifier body 4 to form an independent cathode current circuit. At this time, in the unshielded electroplating area 5 in the inner sub-tank 2, the two first graphite plates 51 are energized on the front and rear inner walls of the inner sub-tank 2 to perform normal electroplating on the electroplating surfaces at both ends of the product 3. In the shielded electroplating area 6, the second graphite plate 61 on the rear inner wall of the inner sub-tank 2 is energized to electroplat one end of the electroplating surface of the product 3. At the same time, the anode shielding plate 62 on the front inner wall of the inner sub-tank 2 precisely shields the current flowing through the surface of the product 3 to be weakly activated, so as to realize the differentiated electroplating treatment of different areas of the product 3.
[0029] Finally, during the segmented electroplating process, the conductive water jet 11, fixedly installed between the weir 10 and the anode conductive mechanism 8, is activated. Its liquid outlet direction is towards the activated surface of the product 3, precisely spraying the activated liquid into the area between the product 3 and the first graphite plate 51 and the second graphite plate 61. The activated liquid can clean the impurities on the electroplated surface of the product 3 and enhance the adhesion of the coating. On the other hand, it can assist in conductivity, improve the stability of current conduction, and at the same time remove the heat generated during the electroplating process, maintaining a stable temperature in the working area. As the electroplating operation progresses, the activated liquid in the inner sub-tank 2 will flow out from both ends and enter the inner side of the outer sub-tank 1. The filter plate 12 in the outer sub-tank 1 filters the outflowing activated liquid, removing impurities and electroplating waste. The filtered activated liquid can be recycled and reinjected into the inner sub-tank 2 for reuse. During this process, the positioning guide roller 72 continuously guides the product 3 to move along the transmission direction, so that the product 3 sequentially completes the processing of the unshielded electroplating area 5 and the shielded electroplating area 6, and finally completes the entire continuous electroplating process and is transported to the next process.
[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A segmented electrolytic activation and masking fixture for continuous electroplating, characterized in that, include: The outer sub-slot (1), inner sub-slot (2), product (3) and rectifier body (4) are provided. The inner sub-slot (2) is installed at the center of the inner side of the outer sub-slot (1). The product (3) is installed at the center of the inner sub-slot (2). At least one unshielded electroplating area (5) and one shielded electroplating area (6) are provided along the moving direction of the product (3). The unshielded electroplating area (5) and the shielded electroplating area (6) are each provided with an independently controlled rectifier body (4). The unshielded electroplating area (5) includes two first graphite plates (51), which are respectively fixedly installed on the front and rear inner walls of the inner sub-tank (2) for electroplating the electroplating surfaces at both ends of the product (3). The shielded electroplating area (6) includes a second graphite plate (61) and an anode shielding plate (62). The second graphite plate (61) is fixedly installed on the inner wall of the rear end of the inner sub-tank (2) for electroplating one end of the product (3). The anode shielding plate (62) is fixedly installed on the inner wall of the front end of the inner sub-tank (2) for shielding the current flowing through the product (3).
2. The segmented electrolytic activation and masking fixture for continuous electroplating according to claim 1, characterized in that, Several support rods (7) are fixedly installed at equal intervals on the inner side of the outer sub-slot (1) near the upper end of the inner sub-slot (2). Each support rod (7) has a bracket rod (71) fixedly installed on its upper end. Each bracket rod (71) has a positioning guide roller (72) for guiding transmission rotatably installed on its lower end. Each positioning guide roller (72) is equipped with a product (3). An anode conductive mechanism (8) is fixedly installed on the upper end of each bracket rod (71). An anode wire (81) is fixedly installed on the inner side of each anode conductive mechanism (8).
3. A segmented electrolytic activation and masking fixture for continuous electroplating according to claim 2, characterized in that, Weirs (10) are symmetrically installed at both ends of the inner sub-slot (2). Several fixing rods (9) are fixedly installed at equal intervals along the moving direction of the product (3) on the inner sidewall of the inner sub-slot (2). A cathode wire (91) is symmetrically fixedly installed at the center of one end of the fixing rod (9). A first graphite plate (51) and a second graphite plate (61) that are independent of each other are fixedly installed on one side of the fixing rod (9).
4. A segmented electrolytic activation and masking fixture for continuous electroplating according to claim 3, characterized in that, The first graphite plate (51) and the second graphite plate (61) are both cathode conductive components. A plurality of the first graphite plates (51) and the second graphite plates (61) are distributed at intervals along the transmission direction of the product (3). The first graphite plate (51) and the second graphite plate (61) correspond to independent rectifier bodies (4) respectively. Each first graphite plate (51) and the second graphite plate (61) is electrically connected to an independent rectifier body (4) through an independent cathode wire (91). The anode conductive mechanism (8) is electrically connected to the rectifier body (4) through an anode wire (81).
5. A segmented electrolytic activation and masking fixture for continuous electroplating according to claim 3, characterized in that, A conductive water jet (11) is fixedly installed between the weir (10) and the anode conductive mechanism (8). The conductive water jet (11) is used to spray activation liquid into the area between the product (3) and the first graphite plate (51) and the second graphite plate (61).
6. A segmented electrolytic activation and masking fixture for continuous electroplating according to claim 5, characterized in that, The conductive water jet (11) is directed toward the activation surface of the product (3). A filter plate (12) is installed on the inner side of the outer sub-tank (1) near the lower end of the two ends of the inner sub-tank (2). The positioning guide roller (72) is symmetrically arranged along the transmission direction of the product (3). The positioning guide roller (72) is used to limit the position of the product (3) during the electrolytic activation process.