A hot tinning equipment for ultra-fine copper wire and a process thereof

Abstract

The present application relates to copper wire production technical field, provide a kind of ultrafine copper wire's hot tinning equipment and process, including tinning tank, the side of the tinning tank is equipped with cooling tank with outside communication, the bottom and top of the cooling tank are equipped with the hole with tinning tank communication, to be worn and be worn in by copper wire, the top of the inside of the tinning tank is equipped with heating pipe, the inside of the tinning tank is equipped with guide roller assembly.The present application overcomes the deficiencies of prior art, reasonable in design, compact structure, copper wire tinning after cooling makes that tin layer is stable after heating again, makes that tin layer is close to molten state, through mould cutter assembly to the tin material on the surface of copper wire is scraped and is handled, for scraping and smoothing copper wire surface excess tin material, improve the uniformity and conductivity of copper wire surface coating.Tinning tank is equipped with several mould cutter assemblies arranged horizontally, prevent mould cutter assembly from overheating due to long time continuous use, avoid copper wire tinning layer accidental melting, prolong the service life of mould cutter assembly.

Description

Technical Field

[0001] This invention relates to the field of copper wire production technology, specifically to a hot-dip tinning equipment and process for ultra-fine copper wire. Background Technology

[0002] Tin plating of copper wire is a key technology for improving the performance of copper wire, involving multiple steps such as unwinding, annealing, pickling, tin plating, cooling, and winding. However, in existing processes, the tin-plated copper wire is directly wound after cooling, often resulting in an uneven surface coating. This unevenness may be due to uneven deposition during the tin plating process, differences in cooling rates, or improper control of winding tension. Uneven surface not only affects the conductivity continuity of the copper wire but may also accelerate oxidation and corrosion, reducing its service life. To address this, we propose a hot-dip tin plating equipment and process for ultrafine copper wire. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a hot-dip tinning equipment and process for ultra-fine copper wires, which overcomes the deficiencies of existing technologies. It features a reasonable design and compact structure, and solves the problem of uneven plating caused by directly winding up tin-plated copper wires after cooling.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot-dip tinning device for ultra-fine copper wire, comprising a tinning box, a cooling tank communicating with the outside on one side of the tinning box, holes communicating with the tinning box at the bottom and top of the cooling tank for the copper wire to pass through and enter, a heating tube at the top inside the tinning box, a guide roller assembly inside the tinning box for guiding the copper wire entering the tinning box, a section of the copper wire extending out of the tinning box positioned below the heating tube, and a die-cutting assembly inside the tinning box for scraping and smoothing excess tin on the surface of the copper wire.

[0007] Preferably, the guide roller assembly includes a first guide roller, a second guide roller, a third guide roller, and a fourth guide roller. The copper wire entering the tin plating box passes sequentially through the first guide roller, the second guide roller, and the third guide roller, then passes through the bottom of the cooling tank into the cooling tank, then through the top of the cooling tank into the tin plating box, and finally passes through the fourth guide roller and exits the tin plating box. The first guide roller and the fourth guide roller are located on the side away from where the copper wire passes through and enters the tin plating box, and both are located above the tin plating liquid in the tin plating box. The second guide roller and the third guide roller are located in the tin plating liquid in the tin plating box.

[0008] Preferably, the tin plating box is provided with a plurality of horizontally arranged die-cutting assemblies. The die-cutting assemblies include an upper template and a lower template. The bottom of the upper template is provided with a plurality of semi-cylindrical upper die-cuttings, and the lower template is provided with a plurality of semi-cylindrical lower die-cuttings. The upper die-cuttings and lower die-cuttings are arranged correspondingly, and are respectively located on the upper and lower sides of the copper wire after passing through the fourth guide roller.

[0009] Preferably, the tin plating box has a fixing plate on the side away from the first guide roller and the fourth guide roller. The fixing plate is located above the upper template and the lower template. The upper template has trapezoidal pressure blocks extending through the top of the fixing plate on both sides. The trapezoidal pressure blocks are connected to the fixing plate by a first spring. The lower template has inverted trapezoidal pressure blocks extending through the top of the fixing plate on both sides. The inverted trapezoidal pressure blocks are connected to the fixing plate by a second spring. The top of the inverted trapezoidal pressure blocks extends upward toward the upper trapezoidal pressure blocks. The tin plating box is provided with a driving assembly to drive the trapezoidal pressure blocks and the inverted trapezoidal pressure blocks, so that the upper die cutter and the lower die cutter move in opposite directions.

[0010] Preferably, the driving assembly includes a cylinder disposed outside the tin plating box, the output end of the cylinder is provided with a push plate, the two sides of the push plate are provided with connecting rods that penetrate into the tin plating box, the side of the connecting rod away from the push plate is provided with a crossbar, the two ends of the crossbar are provided with push blocks, the front and rear sides of the push blocks are both of isosceles trapezoidal structure, used to push the positive trapezoidal pressure block and the inverted trapezoidal pressure block to move in opposite directions.

[0011] Preferably, the cooling tank is provided with a partition to divide it into upper and lower parts, wherein the upper part is provided with several fans to increase the air circulation speed in the upper part of the cooling tank.

[0012] Preferably, the tin plating box has windows on both the front and rear sides, a baffle is provided in the middle of the window, and sliding plates that can slide laterally along the inside of the window are provided on both sides of the window. The sliding plates and the baffle are staggered so that the sliding plates can slide in front of the baffle. The sliding plates are provided with handles.

[0013] A hot-dip tin plating process for ultra-fine copper wire, the process steps of which are as follows:

[0014] S1. The ultra-fine copper wire, after being pickled and cleaned, is fed into the tin plating box, passes through the guide roller assembly, exits the tin plating box, and is then connected to the take-up device.

[0015] S2. Before tin plating, the copper wire is first preheated by a heating tube, and then it is introduced into the tin bath for tin plating. The temperature of the tin bath is controlled at 240-260℃. The copper wire is uniformly wound up by a winding device at a winding speed of 100-200m / min.

[0016] S3. After tin plating in step S2, the copper wire is inserted into the cooling tank for cooling, and then inserted into the tin plating box again.

[0017] S4. After the copper wire cooled in step S3 passes through the guide roller assembly, it is located below the heating tube. The temperature at this position is controlled to be 200-230℃ by the heating tube.

[0018] S5. The copper wire heated in step S4 is scraped by the die-cutting assembly, pushing the excess solder on the surface of the copper wire to make the solder on the surface of the copper wire uniform while scraping off the excess solder.

[0019] S6. The copper wire that has been cooled after passing through the tin plating box in step S5 is wound up by a winding device.

[0020] Preferably, in step S2, the cooling method is to first cool with air and then use air cooling.

[0021] Preferably, step S5 includes several scraping components, which are replaced sequentially every 10-15 minutes, in a continuous cycle.

[0022] (III) Beneficial Effects

[0023] This invention provides a hot-dip tin-plating device and process for ultrafine copper wire. It offers the following advantages:

[0024] 1. After the copper wire is tin-plated, it is cooled to stabilize the tin layer and then reheated until the tin layer is close to a molten state. Then, the tin material on the surface of the copper wire is scraped off by the die-cutting assembly to remove and smooth the excess tin material on the surface of the copper wire, thereby improving the uniformity and conductivity of the copper wire plating.

[0025] 2. The tin plating box is equipped with several horizontally arranged die-cutting assemblies. These assemblies intermittently scrape the surface of the copper wire, effectively preventing the die-cutting assemblies from overheating due to prolonged continuous use. This avoids accidental melting of the tin plating layer on the copper wire surface and significantly extends the service life of the die-cutting assemblies, ensuring the high efficiency and stability of the tin plating process. Attached Figure Description

[0026] Figure 1 This is a front-view perspective of the overall structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 Right-view stereoscopic diagram of the structure;

[0028] Figure 3 For the present invention Figure 1 Left-view stereoscopic diagram of the structure;

[0029] Figure 4 For the present invention Figure 1 3D sectional view of the structure;

[0030] Figure 5 This is a three-dimensional schematic diagram of the drive component structure of the present invention;

[0031] Figure 6 This is a three-dimensional schematic diagram of the fixing plate structure of the present invention;

[0032] Figure 7 This is a three-dimensional schematic diagram of the die-cutting assembly structure of the present invention;

[0033] Figure 8 This is a schematic diagram showing the separation of the template and template structure in this invention.

[0034] In the diagram: 1. Tin plating box; 2. Cooling tank; 3. Partition plate; 4. Fan; 5. Heating tube; 61. Upper template; 62. Upper die cutter; 63. Positive trapezoidal pressure block; 64. First spring; 71. Lower template; 72. Lower die cutter; 73. Inverted trapezoidal pressure block; 74. Second spring; 8. Fixing plate; 91. Cylinder; 92. Push plate; 93. Connecting rod; 94. Crossbar; 95. Push block; 101. First guide roller; 102. Second guide roller; 103. Third guide roller; 104. Fourth guide roller; 11. Baffle plate; 12. Sliding plate; 13. Handle. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] See attached document Figure 1-8 A hot-dip tinning device for ultra-fine copper wire includes a tinning box 1. One side of the tinning box 1 is provided with a cooling tank 2 communicating with the outside. One side of the cooling tank 2 is open and communicates with the outside. The bottom and top of the cooling tank 2 are provided with holes communicating with the tinning box 1 for the copper wire to pass through. The top of the inside of the tinning box 1 is provided with a heating tube 5 for heating the copper wire. The inside of the tinning box 1 is provided with a guide roller assembly for guiding the copper wire entering the tinning box 1. A section of the copper wire extending out of the tinning box 1 is located below the heating tube 5. The tinning box 1 is provided with a die-cutting assembly for scraping and smoothing excess tin material on the surface of the copper wire.

[0037] In use, the copper wire is guided by the guide roller assembly in the tin plating box 1. During operation, the heating tube 5 first preheats the copper wire body. The preheated copper wire enters the tin liquid in the tin plating box 1 for tin plating. After tin plating, the copper wire passes through the cooling tank 2 from the bottom for cooling, which helps stabilize the plating layer and prevents the plating layer from falling off. Then it passes through the top and enters the tin plating box 1 again. The top of the heating tube 5 then heats the tin-plated copper wire. The heating temperature does not exceed the melting point of tin, so that the tin plating layer of the copper wire is close to the molten state. Then the copper wire passes through the die-cutting assembly. The blade of the die-cutting assembly fits tightly against and surrounds the outer circumference of the copper wire, which helps to push away excess tin material on the surface of the copper wire. It is easy to smooth and scrape off excess tin material on the surface of the copper wire, which improves the uniformity and conductivity of the plating layer on the surface of the copper wire.

[0038] The guide roller assembly includes a first guide roller 101, a second guide roller 102, a third guide roller 103, and a fourth guide roller 104. Each of the four components is equipped with several guide rollers, facilitating the simultaneous tin plating of multiple copper wires and effectively improving tin plating efficiency. The copper wires entering the tin plating box 1 pass sequentially through the first guide roller 101, the second guide roller 102, and the third guide roller 103, then pass through the bottom of the cooling tank 2 into the cooling tank 2, then through the top of the cooling tank 2 into the tin plating box 1, and finally pass through the fourth guide roller 104. After the copper wire passes through the tin plating box 1, the first guide roller 101 and the fourth guide roller 104 are located on the side away from the copper wire passing through the tin plating box 1. Both are located above the tin plating liquid in the tin plating box 1, which helps to improve the preheating effect before tin plating and the heating effect after tin plating. The second guide roller 102 and the third guide roller 103 are located in the tin plating liquid in the tin plating box 1. They are located on both sides of the bottom of the tin plating box 1, which helps to increase the tin plating time and avoid insufficient tin plating on the surface of the copper wire.

[0039] The tin plating box 1 contains several horizontally arranged die-cutting assemblies. These assemblies intermittently scrape the surface of the copper wire to prevent overheating of the die-cutting heads due to prolonged use, which would melt the tin plating layer on the copper wire surface and extend the service life of the die-cutting assemblies. The die-cutting assemblies include an upper template 61 and a lower template 71, which can be separated. The bottom of the upper template 61 has several semi-cylindrical upper die-cutting blades 62, and the lower template 71 has several semi-cylindrical lower die-cutting blades 72. The upper die-cutting blades 62 and lower die-cutting blades 72 are arranged correspondingly and combined to form a circular die-cutting structure. They are respectively located on the upper and lower sides of the copper wire after passing through the fourth guide roller 104, which facilitates the scraping operation on the surface of the tin-plated copper wire.

[0040] A fixing plate 8 is provided on the side of the tin plating box 1 away from the first guide roller 101 and the fourth guide roller 104, so that the die-cutting assembly is away from the fourth guide roller 104, allowing more heating time for the copper wire and ensuring that the tin material on the outside of the copper wire is close to a molten state. The fixing plate 8 is located above the upper template 61 and the lower template 71. The upper template 61 has trapezoidal pressure blocks 63 protruding from the top of the fixing plate 8 on both sides. The trapezoidal pressure blocks 63 are connected to the fixing plate 8 by a first spring 64. The lower template 71 has inverted trapezoidal pressure blocks 73 protruding from the top of the fixing plate 8 on both sides. The inverted trapezoidal pressure blocks 73 are connected to the fixing plate 8 by a second spring 74. The top of the trapezoidal pressure block 73 extends upward toward the positive trapezoidal pressure block 63. The tin plating box 1 is provided with a driving component to drive the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73, so that the upper die 62 and the lower die 72 move in opposite directions. The driving component passes between the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73, so that the positive trapezoidal pressure block 63 moves downward and the inverted trapezoidal pressure block 73 moves downward, further causing the upper die 62 and the lower die 72 to close together to form a complete cutting tool to process the surface tin material of the copper wire. Several die assemblies are provided so that they can be used alternately to avoid the upper die 62 and the lower die 72 from overheating and affecting the scraping effect.

[0041] The driving assembly includes a cylinder 91 located outside the tin plating box 1. A push plate 92 is located at the output end of the cylinder 91. Connecting rods 93, which penetrate into the tin plating box 1, are located on both sides of the push plate 92. A crossbar 94 is located on the side of the connecting rod 93 away from the push plate 92. Push blocks 95 are located at both ends of the crossbar 94. Both the front and rear sides of the push blocks 95 are isosceles trapezoidal structures, used to push the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73 to move in opposite directions. When the cylinder 91 is activated, the push plate 92 pulls the crossbar 94 via the connecting rod 93, further causing the push blocks 95 on both sides to enter between the top of the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73, causing the positive trapezoidal pressure block 63 to move downwards and the inverted trapezoidal pressure block 73 to move upwards. At this time, the upper die cutter 62 and the lower die cutter 72 close together to form a complete cutting tool. After a period of use... The cylinder 91 is restarted, causing the crossbar 94 to pull the push block 95. At this time, the push block 95 passes the first die assembly. Under the action of the first spring 64 and the second spring 74, the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73 in the first die assembly are reset. At this time, the cutter in the first die assembly no longer scrapes the surface of the copper wire. Then, the push block 95 pushes the positive trapezoidal pressure block 63 and the inverted trapezoidal pressure block 73 in the second die assembly so that they move in opposite directions, and the second die assembly forms a complete cutter structure to scrape the surface of the copper wire. By using multiple die assemblies to alternately scrape the surface of the copper wire, the wear of a single cutter can be reduced, and the overheating of the cutter edge can be avoided, which would cause the tin on the surface of the copper wire to melt and affect the tin plating effect.

[0042] The cooling tank 2 is equipped with a partition 3, which divides it into upper and lower parts. The upper part is equipped with several fans 4 to increase the air circulation speed in the upper part of the cooling tank 2. When the copper wire enters the cooling tank 2, it is first cooled at room temperature to cool the tin material on its surface to a non-molten state. Then, it is cooled rapidly by air cooling through the fans 4 to avoid the tin material on the surface of the copper wire being blown away by direct air cooling, which would affect the tin plating quality.

[0043] The tin plating box 1 has windows on both the front and back sides. A baffle 11 is provided in the middle of the window. Sliding plates 12 that can slide horizontally along the inside of the window are provided on both sides of the window. The sliding plates 12 and the baffle 11 are staggered so that the sliding plates 12 can slide in front of the baffle 11. A handle 13 is provided on the sliding plate 12. The sliding plate 12 can be slid to open the window by using the handle 13. Copper wires can be inserted and tin plating solution can be added through the window.

[0044] A hot-dip tin plating process for ultra-fine copper wire, the process steps of which are as follows:

[0045] S1. The ultra-fine copper wire after pickling and impurity removal is fed into the tin plating box 1, passes through the guide roller assembly and exits the tin plating box 1, and is then connected to the take-up device.

[0046] S2. Before tin plating, the copper wire is first preheated by heating tube 5 to prevent cold copper wire from directly entering the hot tin liquid, which would generate thermal stress inside the copper wire and cause deformation or damage. Then it is introduced into the tin liquid for tin plating. The temperature of the tin liquid is controlled at 240-260℃. The copper wire is uniformly wound up by the winding device at a winding speed of 100-200m / min.

[0047] S3. After tin plating in step S2, the copper wire is inserted into the cooling tank 2 for cooling, and then inserted into the tin plating box 1 again. The cooling process after hot tin plating helps to stabilize the plating layer and prevent the plating layer from deforming or falling off.

[0048] S4. After the copper wire cooled in step S3 passes through the guide roller assembly, it is located below the heating tube 5. The temperature at this position is controlled by the heating tube 5 to be 200-230℃ to prevent the tin on the surface of the copper wire from melting directly and affecting the uniformity of the tin.

[0049] S5. The copper wire heated in step S4 is scraped by the die-cutting assembly. After the tin-plated copper wire is heated, the tin on its surface is molten, which can reduce the friction between the die-cutting assembly and the tin on the surface of the copper wire. The cutter of the die-cutting assembly pushes the excess tin on the surface of the copper wire, so that the tin on the surface of the copper wire is uniform and the excess tin is scraped off.

[0050] S6. The copper wire that has been cooled after passing through the tin plating box 1 in step S5 is wound up by the winding device.

[0051] Preferably, in step S2, the cooling method is to first cool with air and then use air cooling to avoid the tin material on the surface of the copper wire being blown away by direct air cooling, which would affect the uniformity of tin plating.

[0052] Preferably, step S5 includes several scraping components, which are replaced sequentially every 10-15 minutes, in a continuous cycle to prevent the scraping components from overheating due to prolonged use, which would affect the uniformity of tin plating and the service life of the tools.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hot-dip tinning device for ultra-fine copper wire, comprising a tinning box (1), characterized in that: The tin plating box (1) has a cooling tank (2) connected to the outside on one side. The bottom and top of the cooling tank (2) are provided with holes connected to the tin plating box (1) for copper wires to pass through. The top of the tin plating box (1) is provided with a heating tube (5). The tin plating box (1) is provided with a guide roller assembly for guiding the copper wires entering the tin plating box (1). A section of the copper wire extending out of the tin plating box (1) is located below the heating tube (5). The tin plating box (1) is provided with a die-cutting assembly for scraping and smoothing excess tin on the surface of the copper wire. The guide roller assembly includes a first guide roller (101), a second guide roller (102), a third guide roller (103), and a fourth guide roller (104). The copper wire entering the tin plating box (1) passes through the first guide roller (101), the second guide roller (102), and the third guide roller (103) in sequence, then passes through the bottom of the cooling tank (2) and enters the cooling tank (2), then passes through the top of the cooling tank (2) and enters the tin plating box (1), and finally passes through the fourth guide roller (104) and exits the tin plating box (1). The first guide roller (101) and the fourth guide roller (104) are located on the side away from where the copper wire passes through and enters the tin plating box (1), and both are located above the tin plating liquid in the tin plating box (1). The second guide roller (102) and the third guide roller (103) are located in the tin plating liquid in the tin plating box (1). The tin plating box (1) is provided with a number of horizontally arranged die-cutting assemblies. The die-cutting assemblies include an upper template (61) and a lower template (71). The bottom of the upper template (61) is provided with a number of semi-cylindrical upper die-cuttings (62), and the lower template (71) is provided with a number of semi-cylindrical lower die-cuttings (72). The upper die-cuttings (62) and the lower die-cuttings (72) are arranged correspondingly, and the two are respectively arranged on the upper and lower sides of the copper wire after passing through the fourth guide roller (104). The tin plating box (1) is provided with a fixing plate (8) on the side away from the first guide roller (101) and the fourth guide roller (104). The fixing plate (8) is located above the upper template (61) and the lower template (71). The upper template (61) is provided with trapezoidal pressure blocks (63) that extend through the top of the fixing plate (8) on both sides. The trapezoidal pressure blocks (63) are connected to the fixing plate (8) by the first spring (64). The lower template (71) is provided with inverted trapezoidal pressure blocks (73) that extend through the top of the fixing plate (8) on both sides. The inverted trapezoidal pressure blocks (73) are connected to the fixing plate (8) by the second spring (74). The top of the inverted trapezoidal pressure blocks (73) extends upward toward the trapezoidal pressure blocks (63). The tin plating box (1) is provided with a driving assembly to drive the trapezoidal pressure blocks (63) and the inverted trapezoidal pressure blocks (73), so that the upper die cutter (62) and the lower die cutter (72) move in opposite directions.

2. The hot-dip tinning equipment for ultrafine copper wire as described in claim 1, characterized in that: The drive assembly includes a cylinder (91) disposed outside the tin plating box (1). The output end of the cylinder (91) is provided with a push plate (92). The two sides of the push plate (92) are provided with connecting rods (93) that penetrate into the tin plating box (1). The side of the connecting rod (93) away from the push plate (92) is provided with a crossbar (94). The two ends of the crossbar (94) are provided with push blocks (95). The front and rear sides of the push block (95) are both isosceles trapezoidal structures, which are used to push the positive trapezoidal pressure block (63) and the inverted trapezoidal pressure block (73) to move in opposite directions.

3. The hot-dip tinning equipment for ultrafine copper wire as described in claim 1, characterized in that: The cooling tank (2) is provided with a partition (3) to divide it into upper and lower parts. The upper part is provided with several fans (4) to increase the airflow speed in the upper part of the cooling tank (2).

4. The hot-dip tinning equipment for ultrafine copper wire as described in claim 1, characterized in that: The tin plating box (1) has windows on both the front and back sides. A baffle (11) is provided in the middle of the window. Sliding plates (12) that can slide horizontally along the inside of the window are provided on both sides of the window. The sliding plates (12) and the baffle (11) are staggered so that the sliding plates (12) can slide in front of the baffle (11). A handle (13) is provided on the sliding plates (12).

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