Open barrel plating

Abstract

The utility model discloses an open type electroplating drum belongs to electroplating device technical field, and electroplating drum includes the cylinder and sets up the inlet and outlet on the cylinder, wherein both ends of cylinder are sealed, and the cross section of cylinder is snail line, and the inner chamber of cylinder forms snail cavity, the inlet and outlet are set up on the lateral wall of snail cavity, and the inlet and outlet are arranged in the terminal position when snail line spirals outward. The circumferential rotation of cylinder along the increasing direction of snail line polar angle can realize the turnover of the material in snail cavity, and the circumferential rotation of cylinder along the decreasing direction of snail line polar angle can realize the unloading of the material in snail cavity. The electroplating drum disclosed by the utility model not only can improve the electroplating effect, but also can realize automatic unloading.

Description

Technical Field

[0001] This utility model belongs to the technical field of electroplating equipment, and specifically relates to an open electroplating drum. Background Technology

[0002] Electroplating drums (also known as barrel plating drums) are the core equipment in the barrel plating process. Their design goal is to allow a large number of small parts to tumble evenly in the electroplating tank while ensuring that the current can pass through smoothly to achieve electroplating.

[0003] The most common cross-section of the roller is hexagonal (hexagonal prism), but there are also round and square rollers. Existing rollers usually have a horizontal opening on their wall, with a cover at the opening. The cover is fixed to the opening by a locking mechanism. During electroplating, the material is loaded and unloaded by opening the cover. The cover must be sealed tightly during electroplating to prevent parts from leaking out. During electroplating, the roller is driven to rotate in the electroplating tank, causing the internal parts to tumble continuously, thereby achieving uniform electroplating.

[0004] Currently, when electroplating parts are rolled down the cylinder wall during electroplating, they cannot be actively dispersed or have their movement trajectory changed. This results in uneven rolling of the parts, which affects the electroplating effect. In addition, the loading and unloading process requires opening the inlet and outlet covers through a locking mechanism, making the whole process quite cumbersome. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art mentioned above. It has a simple structure, reasonable design, and strong practicality.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an open electroplating roller, comprising: a cylinder body, both ends of which are sealed, the cross-section of the cylinder body is a spiral line, and the inner cavity of the cylinder body forms a spiral cavity; The inlet and outlet are located on the outer wall of the volute cavity and are positioned at the end of the volute line. When the cylinder rotates in a circular motion along the direction of increasing polar angle of the volute line, the material inside the volute cavity can be turned over. When the cylinder rotates in a circular motion along the direction of decreasing polar angle of the volute line, the material inside the volute cavity can be unloaded.

[0007] The spiral line containing the cross-section of the spiral cavity is composed of multiple circular arcs connected in sequence.

[0008] The spiral line containing the cross-section of the spiral cavity is composed of multiple straight lines connected in sequence.

[0009] When multiple straight lines are connected in sequence, the included angle between adjacent straight lines is 108°-160°.

[0010] The polar angle θ corresponding to the spiral line where the cross-section of the spiral cavity is located is: 5 / 2π < θ < 5π.

[0011] The range of the shape parameter b corresponding to the spiral line where the spiral cavity cross-section is located is: 0.1 < b < 0.2.

[0012] The inner wall of the spiral cavity is provided with anti-slip texture.

[0013] The inlet and outlet are designed with an outward-sloping design.

[0014] This utility model has the following advantages compared with the prior art: 1. This utility model discloses an open-type electroplating drum. When the drum rotates along the direction of increasing vortex angle, the material is driven and climbed by the drum wall inside the vortex cavity. When the workpieces climb to a limit position, the outermost workpieces will lose balance first and begin to slide downwards. The sliding of the outermost workpieces will disturb the next layer, triggering a chain reaction, causing the workpieces to slide down layer by layer like an "avalanche". This surface sliding process can efficiently expose the bottom workpieces to the surface layer by layer, achieving deep mixing. Therefore, this application strengthens this tumbling process through the unique vortex cross-section design of the drum and the geometric structure of "high lifting at the small radius end and low receiving at the large radius end", ensuring that the workpieces generate sufficient displacement and flipping when falling. Finally, this continuous cycle composed of "overall climbing" and "surface falling" allows all workpieces to be evenly flipped and fully exposed to the electrolyte, thereby obtaining a high-quality electroplating effect. 2. This utility model discloses an open electroplating drum. When the drum rotates in the opposite direction of the increasing polar angle of the volute, the material lifted in the cavity will slide along the smooth and continuous inner wall of the volute cavity under the action of gravity and gather at the lowest inlet and outlet, thereby completing a fast and thorough automatic unloading. Compared with the traditional drum method of stopping the machine and opening the unloading port for unloading, this unloading method achieves fast and low-energy unloading, and there is no residue in the unloading cavity, which greatly improves the unloading efficiency and ease of operation.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an open electroplating drum device according to the present invention; Figure 2 This is a diagram showing the initial rotation state of an open-type electroplating drum according to this utility model. Figure 3 This is a diagram showing the material turning process during the rotation of an open electroplating drum according to this utility model. Figure 4 This is a diagram showing the subsequent rotation state of an open electroplating drum according to the present invention; Figure 5This is a diagram showing the unloading state of an open electroplating drum according to this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Cylinder body; 2. Inlet and outlet; 3. Spiral cavity. Detailed Implementation

[0018] like Figure 1 As shown, this utility model discloses an open electroplating roller, comprising a cylinder body 1 and an inlet / outlet 2 disposed on the cylinder body 1. Both ends of the cylinder body 1 are sealed, the cross-section of the cylinder body 1 is a spiral, and the inner cavity of the cylinder body 1 forms a spiral cavity 3. The inlet / outlet 2 is disposed on the outer wall of the spiral cavity, and the inlet / outlet 2 is arranged at the end position when the spiral spiral spirals outward. When the cylinder body 1 rotates in a circular motion along the direction of increasing polar angle of the spiral, the material inside the spiral cavity 3 can be turned over. When the cylinder body 1 rotates in a circular motion along the direction of decreasing polar angle of the spiral, the material inside the spiral cavity 3 can be unloaded.

[0019] The electroplating drum disclosed in this utility model has a low rotation speed of the drum body 1 during the electroplating process. Therefore, the effect of centrifugal force is not considered during the rotation of the drum. During the electroplating process, the entire workpiece pile is treated as a whole. At this time, the bottom workpiece that makes up the workpiece pile and is in contact with the drum wall is mainly subjected to gravity, friction, and the support force of the drum wall. When the drum body 1 rotates circumferentially along the direction of increasing spiral angle at the beginning of electroplating, all the material inside the drum body 1 enters the bottom inner side of the drum body 1. Figure 1 As shown, when cylinder 1 continues to rotate, the cylinder wall drags the bottom layer of workpieces through static friction. While being dragged, the bottom workpieces transfer the dragging force layer by layer to the upper workpieces through the squeezing and friction between the workpieces, causing the workpiece pile to climb up along the cylinder wall. During this process, the total dragging force on the workpiece pile (cylinder wall friction + internal workpiece friction) counteracts the component of the total downward gravity along the cylinder wall. When cylinder 1 continues to rotate and the workpiece pile is lifted to a limit position, the component of gravity on the surface workpieces becomes the driving force that causes the workpieces to slide down. When this driving force is greater than the static friction on the workpieces, the surface workpieces will lose balance first and begin to slide down. The sliding of the surface workpieces will disturb the next layer of workpieces, triggering a chain reaction, causing the workpieces to slide down layer by layer like an "avalanche". This surface sliding process can efficiently expose the bottom workpieces to the surface layer by layer, achieving deep mixing. Figure 3 This is a schematic diagram of the workpiece falling over. Figure 4The diagram shows the state of the workpiece after it has been tumbled. Therefore, this application uses a unique spiral cross-section design of the roller and a geometric structure of "high lifting at the small radius end and low receiving at the large radius end" to enhance the tumbling process. This ensures that the workpiece has sufficient displacement and tumbling when it falls. Ultimately, this continuous cycle consisting of "overall climbing" and "surface tumbling" allows all workpieces to be evenly tumbled and fully exposed to the electrolyte, thereby obtaining a high-quality electroplating effect.

[0020] Furthermore, the open-type electroplating roller disclosed in this utility model, such as Figure 5 As shown, when the cylinder 1 rotates in the opposite direction of the increase of the volute polar angle, the material lifted in the cavity will slide along the smooth and continuous inner wall of the volute cavity under the action of gravity and gather at the lowest inlet and outlet, thus completing a fast and thorough automatic unloading. Compared with the traditional method of unloading by stopping the machine and opening the unloading port, this unloading method achieves fast and low-energy unloading, and there is no residue in the unloading cavity, which greatly improves the unloading efficiency and ease of operation.

[0021] Furthermore, in this embodiment, the volute line of the volute cavity 3 is formed by multiple segments of arcs connected sequentially to form an arc-shaped inner wall. For this type of volute cavity 3 with an arc-shaped inner wall formed by multiple segments of arcs, the movement of the material on the wall surface is continuously changing due to the smooth transition of the arc of the volute cavity 3. This reduces the impact of movement and makes the rolling action of the workpiece more stable and controllable. For spherical, cylindrical, and other workpieces, the arc-shaped inner wall provides a better contact surface, reducing the high stress concentration caused by point contact or line contact, thereby reducing the risk of scratching the coating. This is crucial for precision workpieces with high surface finish requirements. At the same time, the smooth inner wall makes the overall flow of the material smoother and makes it easier to form a stable and predictable circulation path, which is beneficial to the stability of the electroplating process.

[0022] Furthermore, in this embodiment, the volute line of the volute cavity 3 is formed by multiple straight lines connected sequentially, with the included angle between adjacent straight lines being 108°-160°. In this case, the cross-section of the volute cavity 3 is approximated by a series of straight line segments (i.e., polygons), effectively forming a regular or irregular polygonal roller. When the material moves to the angle (edge) between two straight lines, its direction of movement changes abruptly. This sudden change effectively throws and scatters the material, generating very violent tumbling and mixing. Simultaneously, this intense tumbling ensures that no workpiece can remain hidden in a corner for an extended period; each workpiece is frequently thrown to the top and outside of the material pile, gaining ample electroplating opportunities. This is particularly effective for workpieces that are easily entangled or adhered (such as springs and sheet-like parts). Moreover, compared to the processing of an arc-shaped volute cavity 3, its processing technology is relatively simple, significantly reducing the manufacturing cost of the cylinder 1.

[0023] Furthermore, the polar angle θ corresponding to the volute line containing the cross-section of the volute cavity 3 is: 5 / 2π < θ < 5π. This angular range limits the number of turns in the volute line containing the cross-section of the volute cavity 3. Within this range, the cylinder 1 can provide enough turning points and a sufficiently long path for the workpiece inside, while ensuring a compact structure and controllable cost. This range ensures that the internal space of the drum is used efficiently, accommodating a suitable amount of material, neither too little (affecting efficiency) nor too much (leading to insufficient turning). If the number of turns is less than 5 / 2π, the "volute" shape of the volute line is not obvious, and the lifting height and turning path of the internal material may be insufficient, resulting in an effect similar to a modified polygonal drum, failing to fully utilize its advantages; or if the number of turns exceeds 5π, in addition to a sharp increase in manufacturing costs, the extra turns contribute no further to lifting and turning, but instead increase weight and rotational inertia. In actual electroplating operations, an appropriate number of turns can be selected within this range according to the size of the workpiece to be electroplated.

[0024] Furthermore, the range of the shape parameter b corresponding to the spiral line where the cross-section of the spiral cavity 3 is located is: 0.1 < b < 0.2. This is because the shape parameter b is a key factor determining the "opening speed" or "spacing" of the spiral line. If b < 0.1, the spacing is too narrow, the spiral line is tightly wound, and the material may not be able to obtain sufficient lifting height and will be stuck or congested in the narrow channel. The tumbling action will become cramped and insufficient, and the material is prone to severe compression and friction in the narrow space, leading to scratches. The flow and exchange of the electroplating solution within the cavity will also be hindered. If b > 0.1, the spacing is too wide, the spiral line opens too quickly, and the material needs to rotate a long angle with the cylinder wall to be lifted a small height, resulting in low efficiency. An excessively large spacing may even cause the material to slide down prematurely before reaching the tumbling point, failing to be carried to a sufficiently high position. This will make the tumbling action weak and uncontrollable, significantly reducing the mixing effect. When 0.1 < b < 0.2, the material can be smoothly and stably carried upward by the cylinder wall, with enough space to accelerate and move. After that, the material can be lifted to a sufficiently high position. After reaching the highest point, the mechanical balance is broken, and the material can effectively fall from a sufficiently high position along a steep, inward path, thereby achieving full exposure and mixing.

[0025] Furthermore, the shape parameter b increases sequentially along the outward rotation direction of the volute. As the entire material rolls, the shape parameter b changes synchronously, resulting in a continuous and gradual change in the radius of curvature of the cavity wall. This causes the height at which the material is lifted and its sliding trajectory within the cavity to constantly change. This dynamically changing motion path breaks the "dead zone" or overall sliding phenomenon that may exist in traditional rollers, forcing the material to undergo multi-dimensional, irregular tumbling and mixing. This method greatly improves the mixing uniformity and surface area renewal frequency of the material, ensuring that each workpiece is fully and uniformly exposed to the electroplating solution, thereby effectively improving the uniformity of the electroplated coating and enhancing product quality and production efficiency. Furthermore, the inner wall of the volute cavity 3 is equipped with anti-slip textures. This anti-slip texture design allows the material to move stably along the cylinder wall during the lifting process, reducing unnecessary relative sliding and rolling back, making the lifting process more efficient and controllable. Moreover, due to the increased friction, effective material lifting may not require very high rotational speeds. This helps reduce energy consumption and the risk of violent collisions caused by high centrifugal force.

[0026] Furthermore, the inlet and outlet ports 2 are designed with outward-sloping openings; when the drum reverses to unload, the material gathers at the inlet, and the outward-sloping surface forms a natural slide. At this time, gravity will automatically guide the material to the lowest point of the opening and slide it out smoothly, which greatly promotes the flow of material and avoids the accumulation of material at the edge of the inlet.

[0027] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An open electroplating barrel, characterized by, include: The cylinder (1) is sealed at both ends, the cross section of the cylinder (1) is a spiral line, and the inner cavity of the cylinder (1) forms a spiral cavity (3). The inlet and outlet (2) are located on the outer wall of the volute cavity (3) and the inlet and outlet (2) are located at the end point of the volute. When the cylinder (1) rotates in a circular motion along the direction of increasing polar angle of the volute, the material inside the volute cavity (3) can be turned over. When the cylinder (1) rotates in a circular motion along the direction of decreasing polar angle of the volute, the material inside the volute cavity (3) can be unloaded.

2. An open electroplating barrel according to claim 1, wherein The spiral line of the cross-section of the spiral cavity (3) is composed of multiple circular arcs connected in sequence.

3. An open electroplating barrel as defined in claim 1, wherein The spiral line of the cross-section of the spiral cavity (3) is composed of multiple straight lines connected in sequence.

4. An open electroplating barrel according to claim 3, wherein When multiple straight lines are connected in sequence, the included angle between adjacent straight lines is 108°-160°.

5. An open-type electroplating roller according to claim 2 or 3, characterized in that, The polar angle θ corresponding to the cross-section of the spiral cavity (3) is: 5 / 2π < θ < 5π.

6. An open-type electroplating roller according to claim 2 or 3, characterized in that, The range of the shape parameter b corresponding to the spiral line where the cross section of the spiral cavity (3) is located is: 0.1 < b < 0.

2.

7. An open electroplating barrel as defined in claim 1, wherein The inner wall of the snail-shaped cavity (3) is provided with anti-slip texture.

8. An open-type electroplating roller according to claim 1, characterized in that, The inlet and outlet (2) are set as an inclined opening that slopes outward.

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