Hot tinning equipment for superfine copper wire and process of hot tinning equipment

Abstract

The invention relates to the technical field of copper wire production, and provides a hot tinning device and process for a superfine copper wire, the hot tinning device comprises a tinning box, one side of the tinning box is provided with a cooling tank communicated with the outside, the bottom and the top of the cooling tank are both provided with holes communicated with the tinning box, and the copper wire can penetrate out and penetrate in through the holes; a heating pipe is arranged at the top of the interior of the tinning box, and a guide roller assembly is arranged in the tinning box. The device overcomes the defects in the prior art and is reasonable in design and compact in structure, the copper wire is cooled after tinning, a tin layer is stabilized and then heated again, after the tin layer is close to a molten state, tin on the surface of the copper wire is scraped through the die cutter assembly, redundant tin on the surface of the copper wire is scraped off and smoothed, and the copper wire surface quality is improved. And the uniformity and the conductivity of the copper wire surface coating are improved. And a plurality of die cutter assemblies which are horizontally arranged are arranged in the tin plating box, so that the die cutter assemblies are prevented from being overheated due to long-time continuous use, a copper wire tin plating layer is prevented from being molten accidentally, and the service life of the die cutter assemblies is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of copper wire production, and particularly relates to a hot tin plating device and process for ultra-fine copper wire. Background Art

[0002] The copper wire tin plating process, as a key technology to improve the performance of copper wire, involves multiple links such as wire pay-off, annealing, pickling, tin plating, cooling and wire winding. However, in the existing process, the copper wire after tin plating is directly wound after cooling, and the surface coating is often uneven. This unevenness may be due to uneven deposition during the tin plating process, differences in cooling rate or improper control of the winding tension. The surface unevenness not only affects the conductive continuity of the copper wire, but also may accelerate oxidation and corrosion, reducing its service life. Therefore, we propose a hot tin plating device and process for ultra-fine copper wire. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the present invention provides a hot tin plating device and process for ultra-fine copper wire, which overcomes the deficiencies of the prior art, is reasonably designed, has a compact structure, and solves the problem that the copper wire after existing tin plating is directly wound after cooling and the coating is uneven.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A hot tin plating device for ultra-fine copper wire includes a tin plating tank. One side of the tin plating tank is provided with a cooling tank communicated with the outside. The bottom and top of the cooling tank are both provided with holes communicated with the tin plating tank for the copper wire to pass through and penetrate. A heating pipe is provided at the top inside the tin plating tank. A guide roller assembly is provided inside the tin plating tank for guiding the copper wire entering the tin plating tank. A section of the copper wire extending out of the tin plating tank is arranged below the heating pipe. A die knife assembly is provided inside the tin plating tank for scraping and smoothing the excess tin on the surface of the copper wire.

[0007] Preferably, the guide roller assembly includes a first guide roller member, a second guide roller member, a third guide roller member and a fourth guide roller member. The copper wire entering the tin plating tank sequentially passes through the first guide roller member, the second guide roller member, the third guide roller member, then penetrates into the cooling tank through the bottom of the cooling tank, then penetrates into the tin plating tank through the top of the cooling tank, and finally passes through the fourth guide roller member and exits the tin plating tank. The first guide roller member and the fourth guide roller member are arranged on the side far from the copper wire entering and exiting the tin plating tank, and both are arranged above the tin plating solution in the tin plating tank. The second guide roller member and the third guide roller member are arranged in the tin plating solution in the tin plating tank.

[0008] Preferably, a plurality of horizontally arranged die knife assemblies are provided in the tinning box, and the die knife assemblies include an upper template and a lower template. A plurality of semi-cylindrical upper die knives are provided at the bottom of the upper template, and a plurality of semi-cylindrical lower die knives are provided on the lower template. The upper die knives and the lower die knives are arranged correspondingly, and both are respectively arranged on the upper and lower sides of the copper wire after passing through the fourth guide roller.

[0009] Preferably, a fixed plate is provided on the side of the tinning box away from the first guide roller member and the fourth guide roller member, and the fixed plate is located above the upper template and the lower template, and positive trapezoidal pressure blocks passing through the top of the fixed plate are provided on both sides of the upper template, and the positive trapezoidal pressure blocks are connected to the fixed plate through a first spring, and inverted trapezoidal pressure blocks passing through the top of the fixed plate are provided on both sides of the lower template, and the inverted trapezoidal pressure blocks are connected to the fixed plate through a second spring, and the top of the inverted trapezoidal pressure block extends toward the top of the positive trapezoidal pressure block, and a driving assembly is provided on the tinning box to drive the positive trapezoidal pressure block and the inverted trapezoidal pressure block, so that the upper mold knife and the lower mold knife move in opposite directions.

[0010] Preferably, the driving assembly includes a cylinder arranged outside the tinning box, a push plate is provided at the output end of the cylinder, connecting rods penetrating into the tinning box are provided on both sides of the push plate, a cross bar is provided on the side of the connecting rod away from the push plate, push blocks are provided at both ends of the cross bar, and the front and rear sides of the push block are both isosceles trapezoidal structures, which are used to push the positive trapezoidal pressure block and the inverted trapezoidal pressure block to move in opposite directions.

[0011] Preferably, a partition is provided in the cooling trough to divide it into an upper and lower part, wherein a plurality of fans are provided in the upper part to increase the air circulation speed in the upper part of the cooling trough.

[0012] Preferably, windows are provided on the front and rear sides of the tinning box, a baffle is provided in the middle of the window, sliding plates that can slide laterally along the window are provided on both sides of the window, the sliding plate and the baffle are staggered so that the sliding plate can slide in front of the baffle, and a handle is provided on the sliding plate.

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

[0014] S1. The ultra-fine copper wire after pickling and impurity removal is passed into the tinning box, passes through the guide roller assembly and then passes out of the tinning box, and then is connected to the wire take-up device;

[0015] S2. Before tinning, the copper wire is preliminarily heated by a heating tube, and then passed into the tin liquid for tinning. The temperature of the tin liquid is controlled at 240-260°C, and the copper wire is evenly wound by a winding device at a speed of 100-200m / min.

[0016] S3, after tinning in step S2, the copper wire is inserted into a cooling tank for cooling, and then inserted into the tinning 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, and the temperature at this position is controlled by the heating tube to be 200 - 230 °C;

[0018] S5. Scraping the copper wire heated in step S4 through the die knife assembly to push the excess solder on the surface of the copper wire, so that the solder on the surface of the copper wire is uniform while scraping off the excess solder;

[0019] S6. Reeling in the copper wire cooled after passing through the tin plating tank in step S5 through the wire reeling device.

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

[0021] Preferably, in step S5, there are several scraping assemblies, and the scraping assemblies are sequentially replaced every 10 - 15 minutes, circulating in sequence from the head to the tail.

[0022] (III) Beneficial effects

[0023] The embodiment of the present invention provides a hot tin plating device and process for ultra - fine copper wire. It has the following beneficial effects:

[0024] 1. After the copper wire is tin - plated and cooled to make the tin layer stable, it is heated again. After the tin layer is close to the molten state, the die knife assembly is used to scrape the solder on the surface of the copper wire, which is used to scrape off and smooth the excess solder on the surface of the copper wire, improving the uniformity and conductivity of the coating on the surface of the copper wire.

[0025] 2. There are several die knife assemblies arranged horizontally in the tin plating tank. The several die knife assemblies sequentially and intermittently scrape the surface of the copper wire, effectively preventing the die knife assembly from overheating due to long - term continuous use, thus avoiding the accidental melting of the tin - plated layer on the surface of the copper wire, significantly prolonging the service life of the die knife assembly, and ensuring the high efficiency and stability of the tin plating process. Description of the drawings

[0026] Figure 1 It is the main view three - dimensional schematic diagram of the overall structure of the present invention;

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

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

[0029] Figure 4 For the present invention Figure 1 Sectional three - dimensional schematic diagram of the structure;

[0030] Figure 5 Schematic three-dimensional view of the driving component structure of the present invention;

[0031] Figure 6 Schematic three-dimensional view of the fixed plate structure of the present invention;

[0032] Figure 7 Schematic three-dimensional view of the die cutter assembly structure of the present invention;

[0033] Figure 8 Schematic view of the separation of the upper template and the template structure of the present invention.

[0034] In the figure: 1, tin plating box; 2, cooling tank; 3, partition board; 4, fan; 5, heating pipe; 61, upper template; 62, upper die cutter; 63, positive trapezoidal pressing block; 64, first spring; 71, lower template; 72, lower die cutter; 73, inverted trapezoidal pressing block; 74, second spring; 8, fixed plate; 91, cylinder; 92, push plate; 93, connecting rod; 94, cross bar; 95, push block; 101, first guide roller component; 102, second guide roller component; 103, third guide roller component; 104, fourth guide roller component; 11, baffle; 12, sliding plate; 13, handle. Specific embodiments

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] Refer to the attached Figure 1-8 , a hot tin plating device for ultra-fine copper wires, comprising a tin plating box 1, a cooling tank 2 communicated with the outside is arranged on one side of the tin plating box 1, the cooling tank 2 is open on one side and communicated with the outside, holes are arranged at the bottom and top of the cooling tank 2 and communicated with the tin plating box 1 for the copper wire to pass through and penetrate, a heating pipe 5 is arranged at the top inside the tin plating box 1 for heating the copper wire, a guide roller assembly is arranged inside the tin plating box 1 for guiding the copper wire entering the tin plating box 1, a section of the copper wire extending out of the tin plating box 1 is arranged below the heating pipe 5, and a die cutter assembly is arranged inside the tin plating box 1 for scraping and smoothing the excess tin on the surface of the copper wire.

[0037] During use, the copper wire is guided through the guide roller assembly in the tin plating tank 1. During operation, the heating tube 5 first preheats the copper wire body. The preheated copper wire enters the tin bath in the tin plating tank 1 for tin plating. After tin plating, the copper wire passes through the bottom and into the cooling tank 2 for cooling, which helps to stabilize the coating and prevent the coating from peeling off. Then it passes out from the top and enters the tin plating tank 1 again, and then passes through the top of the heating tube 5 to heat the tinned copper wire. The heating temperature does not exceed the melting point of tin, making the tin coating on the copper wire close to the molten state. Then the copper wire passes through the die knife assembly. The cutting edges of the die knife assembly are closely attached and surround the outer circumference of the copper wire, which helps to push the excess tin on the surface of the copper wire, facilitating the smoothing and scraping of the excess tin on the surface of the copper wire, and improving the uniformity and conductivity of the coating on the surface of the copper wire.

[0038] The guide roller assembly includes a first guide roller member 101, a second guide roller member 102, a third guide roller member 103, and a fourth guide roller member 104. A number of guide rollers are provided on each of them, which is convenient for tin plating multiple copper wires at one time, and can effectively improve the tin plating efficiency. The copper wire entering the tin plating tank 1 passes through the first guide roller member 101, the second guide roller member 102, and the third guide roller member 103 in sequence, then passes through the bottom of the cooling tank 2 and into the cooling tank 2, and then passes through the top of the cooling tank 2 and into the tin plating tank 1, and finally passes out of the tin plating tank 1 after passing through the fourth guide roller member 104. The first guide roller member 101 and the fourth guide roller member 104 are arranged on one side far from the copper wire entering and leaving the tin plating tank 1, and both are arranged above the tin bath in the tin plating tank 1, which is convenient for improving the preheating effect before copper wire tin plating and the heating effect after copper wire tin plating is completed. The second guide roller member 102 and the third guide roller member 103 are arranged in the tin bath in the tin plating tank 1, and the two are respectively arranged on both sides of the inner bottom of the tin plating tank 1, which is convenient for increasing the tin plating time and avoiding too little tin plating amount on the surface of the copper wire.

[0039] A number of die knife assemblies arranged horizontally are provided in the tin plating tank 1. The number of die knife assemblies intermittently performs scraping treatment on the surface of the copper wire in sequence, avoiding overheating of the cutting heads of the die knife assemblies during long-term use, resulting in melting of the tin coating on the surface of the copper wire and improving the service life of the die knife assemblies. The die knife assembly includes an upper template 61 and a lower template 71, which can be detachably arranged. A number of semi-cylindrical upper die knives 62 are provided at the bottom of the upper template 61, and a number of semi-cylindrical lower die knives 72 are provided on the lower template 71. The upper die knives 62 and the lower die knives 72 are arranged correspondingly, and the two form a circular die knife structure in combination, and the two are respectively arranged on the upper and lower sides of the copper wire after passing through the fourth guide roller member 104, which is convenient for scraping the excess material on the surface of the tinned copper wire.

[0040] On one side of the tin plating box 1 away from the first guide roller member 101 and the fourth guide roller member 104, a fixing plate 8 is provided, so that the die knife assembly is away from the fourth guide roller member 104, leaving more heating time for the copper wire, which is convenient for ensuring that the solder on the outer side of the copper wire is close to the molten state. The fixing plate 8 is located above the upper template 61 and the lower template 71. On both sides of the upper template 61, there are positive trapezoidal pressing blocks 63 passing through the top of the fixing plate 8. The positive trapezoidal pressing blocks 63 are connected to the fixing plate 8 through the first springs 64. On both sides of the lower template 71, there are inverted trapezoidal pressing blocks 73 passing through the top of the fixing plate 8. The inverted trapezoidal pressing blocks 73 are connected to the fixing plate 8 through the second springs 74. The top of the inverted trapezoidal pressing block 73 extends upward toward the upper part of the positive trapezoidal pressing block 63. A driving assembly is provided on the tin plating box 1 to drive the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73, so that the upper die knife 62 and the lower die knife 72 move in opposite directions. The driving assembly passes between the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73, so that the positive trapezoidal pressing block 63 moves downward and the inverted trapezoidal pressing block 73 moves downward, further causing the upper die knife 62 and the lower die knife 72 to close into a complete tool to process the solder on the surface of the copper wire. And a plurality of die knife assemblies are provided and can be used alternately to avoid overheating of the upper die knife 62 and the lower die knife 72 and affecting the scraping effect.

[0041] The driving assembly includes a cylinder 91 arranged outside the tin plating box 1. The output end of the cylinder 91 is provided with a push plate 92. On both sides of the push plate 92, there are connecting rods 93 penetrating into the tin plating box 1. On the side of the connecting rod 93 away from the push plate 92, there is a cross bar 94. At both ends of the cross bar 94, there are push blocks 95. The front and back sides of the push blocks 95 are both in an isosceles trapezoidal structure, which is used to push the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73 to move in opposite directions. When the cylinder 91 is started, at this time, the push plate 92 pulls the cross bar 94 through the connecting rod 93, further causing the push blocks 95 on both sides to enter between the top of the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73, and causing the positive trapezoidal pressing block 63 to move downward and the inverted trapezoidal pressing block 73 to move upward. At this time, the upper die knife 62 and the lower die knife 72 close into a complete tool. After using for a period of time, start the cylinder 91 again and make the cross bar 94 pull the push block 95 to move. At this time, the push block 95 exceeds the first die knife assembly. At this time, under the action of the first spring 64 and the second spring 74, the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73 in the first die knife assembly are reset. At this time, the tool in the first die knife assembly no longer scrapes the surface of the copper wire. Then at this time, the push block 95 will push the positive trapezoidal pressing block 63 and the inverted trapezoidal pressing block 73 in the second die knife assembly to make the two move in opposite directions, and make the second die tool assembly form a complete tool structure to scrape the surface of the copper wire. By alternately scraping the surface of the copper wire through multiple die tool assemblies, the wear of a single tool can be reduced, and it can be avoided that the solder on the surface of the copper wire melts due to overheating of the cutting edge of the tool, affecting the tin plating effect.

[0042] The cooling tank 2 is provided with a partition plate 3, which divides it into upper and lower parts. Among them, several fans 4 are arranged in the upper part 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 lower the solder on its surface to a non-molten state, and then air-cooled rapidly by the fans 4 to avoid the solder on the surface of the copper wire being blown away by direct air cooling, which affects the tin plating quality.

[0043] Windows are provided on both the front and rear sides of the tin plating box 1. A baffle 11 is arranged in the middle of the window, and sliding plates 12 that can slide horizontally in the window are arranged on both sides of the window. The sliding plates 12 and the baffle 11 are arranged in a staggered manner so that the sliding plates 12 can slide in front of the baffle 11. A handle 13 is arranged on the sliding plates 12. The sliding plates 12 can be slid by the handle 13 to open the window, and the copper wire can be inserted and the tin plating solution can be added through the window.

[0044] A hot tin plating process for ultra-fine copper wire is as follows:

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

[0046] S2. Before tin plating, the copper wire is first preliminarily heated by the heating tube 5 to avoid the internal generation of thermal stress in the copper wire when the cold copper wire directly enters the hot tin solution, which may cause deformation or damage. Then it is introduced into the tin solution for tin plating. The temperature of the tin solution is controlled at 240 - 260 °C, and the copper wire is evenly wound by the wire winding device. The winding speed is 100 - 200 m / min.

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

[0048] S4. The copper wire after cooling in step S3 is located below the heating tube 5 after passing through the guide roller assembly. The temperature at this position is controlled at 200 - 230 °C by the heating tube 5 to avoid the solder on the surface of the copper wire from melting directly, which affects the uniformity of the solder.

[0049] S5. The copper wire after heating in step S4 is scraped by the die knife assembly. After the tin-plated copper wire is heated, the solder on its surface is in a molten state, which can reduce the friction between the die knife assembly and the solder on the surface of the copper wire. The tool of the die knife assembly pushes 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.

[0050] S6. The copper wire after cooling and exiting the tin plating box 1 in step S5 is wound by the wire winding device.

[0051] Preferably, in step S2, the cooling method is to first cool by air and then use the air-cooling method to avoid the solder on the surface of the copper wire being blown by directly using air cooling, which affects the uniformity of tin plating.

[0052] Preferably, in step S5, several scraping components are provided, and the scraping components are replaced in turn every 10-15 minutes, and the head and tail are circulated in turn to avoid overheating of the cutting tools of the scraping components during long-term use, which affects the uniformity of tin plating and the service life of the cutting tools.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hot tin plating device for ultra-fine copper wires, comprising a tin plating tank (1), characterized in that: One side of the tin plating box (1) is provided with a cooling tank (2) communicating with the outside. The bottom and top of the cooling tank (2) are both provided with holes communicating with the tin plating box (1) for the copper wire to pass through and penetrate. A heating pipe (5) is provided at the top inside the tin plating box (1). A guide roller assembly is provided inside the tin plating box (1) for guiding the copper wire entering the tin plating box (1). A section of the copper wire extending out of the tin plating box (1) is arranged below the heating pipe (5). A die knife assembly is provided inside the tin plating box (1) for scraping and smoothing the excess tin on the surface of the copper wire.

2. The hot tin plating equipment for ultra-fine copper wire according to claim 1, characterized in that: The guide roller assembly includes a first guide roller member (101), a second guide roller member (102), a third guide roller member (103) and a fourth guide roller member (104). The copper wire entering the tin plating box (1) sequentially passes through the first guide roller member (101), the second guide roller member (102), the third guide roller member (103), then penetrates into the cooling tank (2) through the bottom of the cooling tank (2), then penetrates into the tin plating box (1) through the top of the cooling tank (2), and finally passes through the fourth guide roller member (104) and exits the tin plating box (1). The first guide roller member (101) and the fourth guide roller member (104) are arranged on the side far from the copper wire passing through and penetrating the tin plating box (1), and both are arranged above the tin plating solution in the tin plating box (1). The second guide roller member (102) and the third guide roller member (103) are arranged in the tin plating solution in the tin plating box (1).

3. The hot tin plating equipment for an ultra-fine copper wire as described in claim 2, characterized in that: A number of horizontally arranged die knife assemblies are provided inside the tin plating box (1). The die knife assembly includes an upper template (61) and a lower template (71). A number of semi-cylindrical upper die knives (62) are provided at the bottom of the upper template (61). A number of semi-cylindrical lower die knives (72) are provided on the lower template (71). The upper die knives (62) and the lower die knives (72) are arranged correspondingly, and are respectively arranged on the upper and lower sides of the copper wire after passing through the fourth guide roller member (104).

4. The hot tin plating device for ultra-fine copper wire according to claim 3, characterized in that: A fixing plate (8) is provided on one side of the tin plating box (1) far from the first guide roller member (101) and the fourth guide roller member (104). The fixing plate (8) is located above the upper template (61) and the lower template (71). Trapezoidal pressing blocks (63) passing through the top of the fixing plate (8) are provided on both sides of the upper template (61). The trapezoidal pressing blocks (63) are connected to the fixing plate (8) through first springs (64). Trapezoidal pressing blocks (73) passing through the top of the fixing plate (8) are provided on both sides of the lower template (71). The trapezoidal pressing blocks (73) are connected to the fixing plate (8) through second springs (74). The top of the trapezoidal pressing blocks (73) extends towards the upper side of the trapezoidal pressing blocks (63). A driving assembly is provided on the tin plating box (1) to drive the trapezoidal pressing blocks (63) and the trapezoidal pressing blocks (73) so that the upper die knives (62) and the lower die knives (72) move in opposite directions.

5. The hot tin plating equipment for an ultra-fine copper wire according to claim 4, characterized in that: The driving assembly includes a cylinder (91) arranged outside the tin plating box (1). The output end of the cylinder (91) is provided with a push plate (92). Connecting rods (93) penetrating into the tin plating box (1) are arranged on both sides of the push plate (92). A cross bar (94) is arranged on the side of the connecting rod (93) away from the push plate (92). Push blocks (95) are arranged at both ends of the cross bar (94). The front and rear sides of the push block (95) are both of an isosceles trapezoid structure and are used to push the positive trapezoid pressing block (63) and the inverted trapezoid pressing block (73) to move in opposite directions.

6. The hot tin plating equipment for an ultra-fine copper wire according to claim 1, characterized in that: A partition plate (3) is arranged in the cooling tank (2), dividing it into upper and lower parts. A plurality of fans (4) are arranged in the upper part to increase the air circulation speed in the upper part of the cooling tank (2).

7. The hot tin plating equipment for an ultra-fine copper wire as described in claim 1, characterized in that: Windows are provided on both the front and rear sides of the tin plating box (1). A baffle (11) is arranged in the middle of the window. Sliding plates (12) capable of sliding horizontally in the window are arranged on both sides of the window. The sliding plates (12) and the baffle (11) are arranged in a staggered manner so that the sliding plates (12) can slide in front of the baffle (11). A handle (13) is arranged on the sliding plate (12).

8. A hot tin plating process for ultra-fine copper wires, comprising using the hot tin plating equipment for ultra-fine copper wires according to any one of claims 1-7, characterized in that: The process steps are as follows: S1. The ultra-fine copper wire after pickling and impurity removal is introduced into the tin plating box (1), passes through the guide roller assembly, then exits the tin plating box (1), and is then connected to the wire winding device. S2. Before tin plating, the copper wire is first preliminarily heated by the heating tube (5), and then introduced into the tin bath for tin plating. The temperature of the tin bath is controlled at 240 - 260 °C. The wire winding device winds the copper wire evenly, and the winding speed is 100 - 200 m / min. S3. The copper wire after tin plating in step S2 is introduced into the cooling tank (2) for cooling, and then re-introduced into the interior of the tin plating box (1). S4. The cooled copper wire in step S3 is located below the heating tube (5) after passing through the guide roller assembly. The temperature at this position is controlled at 200 - 230 °C by the heating tube (5). S5. The copper wire heated in step S4 is scraped by the die knife assembly to push the excess tin on the surface of the copper wire, making the tin on the surface of the copper wire uniform while scraping off the excess tin. S6. The wire winding device winds the copper wire that has cooled after exiting the tin plating box (1) in step S5.

9. The hot tin plating process for an ultra-fine copper wire as described in claim 8, characterized in that: In step S2, the cooling method is to first cool by air and then use the air cooling method.

10. The hot tin plating process for an ultra-fine copper wire as described in claim 8, characterized in that: In step S5, a plurality of scraping assemblies are provided, and the scraping assemblies are sequentially replaced every 10 - 15 minutes, and the cycle is repeated from the beginning to the end.

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