Copper-clad aluminum reflective tape production line and copper-clad aluminum reflective tape produced by same

Abstract

The invention relates to the technical field of photovoltaic solder strips, and discloses a copper-clad aluminum reflective tape production line which comprises a copper-aluminum cladding device and a hot-dip tinning device which are fixedly arranged on a foundation, and an aluminum rod preforming device is arranged on the upstream side of the copper-aluminum cladding device; the aluminum rod preforming device comprises a pair of preforming pinch rollers which are arranged up and down; the hot-dip tinning device comprises a tinning tank, a guide wheel A, a guide wheel B and a guide wheel C, wherein the guide wheel A and the guide wheel B are arranged in the tinning tank, and the guide wheel C is arranged above the tinning tank and located above the guide wheel A. The guide wheel A and the guide wheel C can translate relative to the guide wheel B. By arranging the aluminum rod preforming device, an aluminum rod is flattened in advance, meanwhile, the quality, stability and consistency of raw materials can be effectively controlled, the problem that aluminum is prone to being exposed due to large deformation in the later calendering process is solved, and the product quality is improved; the guide wheel A and the guide wheel C in the hot-dip tinning device can translate relative to the guide wheel B, and the path of copper-clad aluminum passing through tinning liquid can be adjusted, so that the thickness of a tin layer is effectively controlled, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic solder tapes, and particularly to a production line for copper-clad aluminum reflective tapes. Background Art

[0002] In the field of metal material processing, copper-clad aluminum solder tapes are widely used in multiple industries such as photovoltaic and electronics due to the comprehensive advantages of the good electrical conductivity of copper and the light weight and low cost of aluminum. However, the existing production technologies of copper-clad aluminum solder tapes have significant defects, which severely restrict the improvement of product quality and the control of production costs.

[0003] In terms of raw material acquisition, most production enterprises rely on purchasing ready-made copper-clad aluminum wire rods. This procurement mode not only increases the external dependence of production, raises the uncertainty of raw material supply, but also makes it difficult for enterprises to control the quality of copper-clad aluminum wire rods at the source.

[0004] In the production process, the manufacturing of solder tapes requires wire drawing and multiple rolling processes. First, the purchased copper-clad aluminum wire rods are wire-drawn to reduce the diameter. Subsequently, through multiple rolling processes, the round copper-clad aluminum wire rods are transformed into flat tapes. However, there are two prominent problems in this process: Aluminum exposure is likely to occur during the rolling process: Due to the physical property differences between copper and aluminum, during multiple rolling processes, the deformation of copper-clad aluminum wire rods is uneven, and the aluminum core layer is extremely likely to break through the outer copper coating and be exposed. Aluminum exposure not only seriously affects the appearance quality of the solder tapes, but also significantly reduces the key properties such as the electrical conductivity and corrosion resistance of the solder tapes. When applied in the photovoltaic field, solder tapes with aluminum exposure may lead to a decrease in the connection reliability of battery modules, an increase in resistance, a reduction in power generation efficiency, and even affect the service life of the entire photovoltaic system.

[0005] Large amount of tin consumption and high costs: In the existing solder tape production lines, in the tin plating process, there is a lack of effective means to precisely control the thickness of the tin layer, and often an excessive amount of tin is used to ensure product quality. This not only causes waste of tin resources but also significantly increases the raw material cost. Summary of the Invention

[0006] The purpose of the present invention is to provide a production line for copper-clad aluminum reflective tapes to solve the problems of easy aluminum exposure during rolling and high costs caused by a large amount of tin consumption in the existing production process.

[0007] The above technical purpose of the present invention is achieved through the following technical solutions: Copper-clad aluminum reflective tape production line, including a copper-aluminum cladding device, a welding device, a drawing device, a rolling device, a grooving device, a heat treatment device, a hot dip tinning device and a winding device fixedly arranged on a foundation. An aluminum rod preforming device is arranged on the upstream side of the copper-aluminum cladding device; the aluminum rod preforming device includes a pair of preforming pressing wheels arranged up and down; the aluminum rod can be flattened by the aluminum rod preforming device, and then the outer layer of copper is clad, so as to avoid the problem that the copper-clad aluminum base tape is prone to expose aluminum due to large deformation during the later rolling device pressing. The hot dip tinning device includes a tinning tank, guide wheels A and B arranged in the tinning tank, and a guide wheel C arranged above the tinning tank and above guide wheel A. Guide wheels A and C can move relative to guide wheel B. By moving guide wheels A and C, the path of the copper-clad aluminum passing through the tinning solution can be adjusted. The longer the path, the thicker the tin layer covering the copper-clad aluminum base tape. By changing the path length, the thickness of the solder tape outside the copper-clad aluminum base tape can be effectively controlled, thereby further controlling the cost. At the same time, it can cooperate with solder tapes of different specifications and different speeds for tinning work.

[0008] The present invention is further arranged as: a pair of end forming rollers arranged front and back are arranged on the downstream side of the pair of preforming pressing wheels, and a shaping ring groove with a semicircular cross-section is formed in the middle of the end forming rollers; A pair of shaping pressing wheels arranged up and down are arranged on the downstream side of the pair of forming rollers. The circular aluminum rod can be flattened by the preforming pressing wheels, the two ends of the aluminum rod can be shaped by the end forming rollers to make it more smooth, and then further shaped by the shaping pressing wheels to make it into the required shape, such as a waist shape.

[0009] The present invention is further arranged as: guide wheels A and C are rotatably connected to a moving frame, the moving frame is connected with a servo linear module for driving it to move, the servo linear module is electrically connected to a controller, the moving frame can be driven to move by the servo linear module, and the moving frame can drive guide wheels A and C to move, so as to change the relative distance between guide wheels A and B, thereby adjusting the path of the solder tape passing through the tinning solution. The longer the path length, the greater the thickness of the later tinning, so as to meet the requirements of different coating thicknesses.

[0010] The present invention is further arranged as: the tinning tank is fixedly arranged on a pressure sensor, the pressure sensor is electrically connected to the controller, the height of the tinning solution in the tinning tank can be monitored in real time by the pressure sensor. When the pressure sensor detects that the weight of the tinning tank has decreased, it means that the tinning solution in the tinning tank is less, and then the servo linear module is controlled to drive the moving frame to move, and the moving frame drives guide wheels A and C to move, so that the path length of the solder tape passing through the tinning solution is always equal, so that the tinning amount on the solder tape is more uniform and the quality stability of the solder tape is improved; at the same time, when the pressure sensor detects that the tinning solution in the tinning tank is less than the set value, a corresponding alarm is issued through the controller to inform the staff to add tin.

[0011] The present invention is further configured as: the copper-aluminum cladding device includes an aluminum rod guide wheel, a copper strip guide wheel, a combining guide wheel, a plurality of copper strip arc-turning rollers arranged in a gradually changing manner, and a plurality of copper strip edge-pressing rollers arranged in a progressive manner, which are arranged vertically. The copper strip arc-turning roller includes a roller base body, an arc portion formed at the end of the roller base body, and a plane portion tangent to the arc portion; the central angles of the arc portions of the plurality of copper strip arc-turning rollers gradually increase in sequence, and the maximum central angle of the arc portion increases to 90 degrees. The copper strip can be gradually turned over through the plurality of arc portions so as to wrap the copper strip on the lower outer wall of the flattened aluminum rod. The angles θ between the plurality of copper strip edge-pressing rollers and the horizontal plane gradually decrease in sequence, and the minimum angle of the angle θ is 0 degree. After the copper strip is turned over by the copper strip arc-turning roller, both ends of the copper strip are arranged upward, and then both ends of the copper strip are gradually inclined inward through the copper strip edge-pressing rollers until both ends of the copper strip are abutted against the aluminum rod.

[0012] The present invention is further configured as: an aluminum rod positioning roller is arranged above the copper strip arc-turning roller, and a positioning flange is arranged at the outer end of the aluminum rod positioning roller; the aluminum tube positioning roller can limit the position of the flattened aluminum rod at the center, so as to ensure the position accuracy of the copper strip cladding on the aluminum rod. Flanges are formed at both ends of the aluminum rod guide wheel and the copper strip guide wheel. The flattened aluminum rod and the copper strip can be centered by the flanges, ensuring the accuracy of the feeding position.

[0013] The present invention is further configured as: the hot dip tinning device further includes an air knife and a glass bead spraying mechanism arranged on the downstream side of the air knife; The glass bead spraying mechanism includes an electrostatic spray gun and a plate electrode respectively arranged on both sides of the solder tape. The electrostatic spray gun is connected with a glass bead feeding pipe. A glass bead feeding flow control device is arranged on the upstream side of the glass bead feeding pipe and the glass beads are transported to the electrostatic spray gun through high-pressure gas. After the electrostatic spray gun is electrified, the glass beads are further accelerated and the glass beads are excited onto the temporarily solidifying tin layer of the solder tape. Finally, the glass beads are fixed after the tin layer solidifies.

[0014] The present invention is further configured as: the particle size of the glass beads ejected by the electrostatic spray gun is 0.1 - 3 μm; the refractive index of the glass beads is 1.5 - 2.0.

[0015] The present invention is further configured as: a ceramic sheath is arranged between the air knife and the guide wheel B, and the lower end of the ceramic sheath extends into the tin liquid in the tinning tank box; the tinning liquid in the tinning tank box will float to the surface layer of the tinning liquid due to oxidation or impurities inside its material. The floating matter can be effectively blocked by the ceramic sheath, preventing the solder tape from carrying away the floating matter and affecting the quality. There are at least two tin liquid preliminary precipitation rollers arranged inside the ceramic sheath. The welding tape bypasses the tin liquid preliminary precipitation rollers in sequence. Through the tin liquid preliminary precipitation rollers, the redundant cleaning liquid on the welding tape can be preliminarily peeled off, and then through the air knife, the tin layer thickness of the welding tape can be further thinned and controlled.

[0016] The copper-clad aluminum reflective tape produced by the copper-clad aluminum reflective tape production line includes an aluminum core layer, a copper layer coated on the outer side of the aluminum core layer, and a tin layer arranged on the outer side of the copper layer. A glass microsphere layer is arranged on one side of the tin layer, and the glass microsphere layer is dispersed on the surface of the tin layer or embedded inside the tin layer.

[0017] The prominent effects of the present invention are as follows: Compared with the prior art, by arranging an aluminum rod preforming device to perform pre-flattening treatment on the aluminum rod, the quality, stability and consistency of the raw materials can be effectively controlled at the same time, avoiding the problem of easy aluminum exposure due to large deformation during the later rolling process, and improving the product quality.

[0018] In the hot dip tinning device, the guide wheel A and the guide wheel C can translate relative to the guide wheel B, which can adjust the path of the copper-clad aluminum passing through the tinning solution, thereby effectively controlling the tin layer thickness and reducing the production cost.

[0019] The setting of the pressure sensor can monitor the height of the tinning solution in real time and automatically adjust the distance between the guide wheel A and the guide wheel B to ensure uniform tinning amount of the welding tape and improve the stability of the product quality.

[0020] The glass microsphere spraying mechanism forms a glass microsphere layer on the tin layer, which can enhance the reflective effect of the reflective tape and improve the photoelectric conversion efficiency of the later photovoltaic equipment.

[0021] The setting of the ceramic sheath and the tin liquid preliminary precipitation rollers can effectively block floating objects, preliminarily peel off redundant tin liquid, further control the tin layer thickness and improve the product quality. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a partial assembly schematic diagram of the aluminum rod preforming device and the copper-aluminum cladding device of the present invention; Figure 3 is a schematic diagram of the process of the copper strip covering the aluminum rod; Figure 4 is a schematic structural diagram of the hot dip tinning device of the present invention; Figure 5 is a schematic structural diagram of the copper-clad aluminum reflective tape of the present invention.

[0023] Reference numerals: 1. Aluminum rod preforming device; 2. Copper-aluminum cladding device; 3. Hot dip tinning device; 4. Welding device; 5. Drawing device; 6. Rolling device; 7. Heat treatment device; 11. Preformed pressing wheel; 12. End forming roller; 13. Shaping ring groove; 14. Shaping pressing wheel; 21. Aluminum rod guide wheel; 22. Copper strip guide wheel; 23. Combining guide wheel; 24. Copper strip arc turning roller; 25. Copper strip edge pressing roller; 26. Aluminum rod positioning roller; 241. Roller base; 242. Arc part; 243. Plane part; 261. Positioning flange; 31. Tin plating tank box; 32. Guide wheel A; 33. Guide wheel B; 34. Moving frame; 35. Servo linear module; 36. Pressure sensor; 37. Air knife; 38. Glass bead spraying mechanism; 39. Ceramic sheath; 40. Tin liquid preliminary precipitation roller; 381. Electrostatic spray gun; 382. Electrode plate; 383. Glass bead feed pipe; 41. Output shaft; 42. Box body; 43. Synchronous gear; 44. Idler gear; 80. Copper strip; 81. Aluminum rod; 90. Welding tape; 901. Aluminum core layer; 902. Copper layer; 903. Tin layer; 904. Glass bead layer. Specific embodiments

[0024] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0025] The following refers to Figures 1 to 5 to illustrate the embodiments of the present invention: Copper-clad aluminum reflective tape production line: As Figure 1 . Figure 2 shown, this production line includes a copper-aluminum cladding device 2, a welding device 4, a drawing device 5, a rolling device 6, a grooving device, a heat treatment device 7, a hot dip tin plating device 3 and a winding device fixedly arranged on the foundation. An aluminum rod preforming device 1 is provided on the upstream side of the copper-aluminum cladding device 2, and the aluminum rod preforming device 1 includes a pair of preformed pressing wheels 11 arranged up and down. The peeled aluminum rod can be flattened by the aluminum rod preforming device, and then the outer layer of copper is clad, so as to avoid the problem of easy aluminum exposure due to large deformation when the copper-clad aluminum base tape is pressed by the later rolling device.

[0026] As Figure 4As shown in the figure, the hot dip tinning device 3 includes a tinning tank 31, a guide wheel A 32 and a guide wheel B 33 arranged in the tinning tank 31, and a guide wheel C 30 arranged above the tinning tank 31 and above the guide wheel A. The guide wheel A 32 and the guide wheel C 30 can translate relative to the guide wheel B 33. By moving the guide wheel A and the guide wheel C, the path of the copper-clad aluminum passing through the tinning solution can be adjusted. The longer the path, the thicker the tin layer covering the outside of the copper-clad aluminum baseband. By changing the path length, the thickness of the solder strip outside the copper-clad aluminum baseband can be effectively controlled, thereby controlling the cost.

[0027] Main production steps: First, peel the aluminum rod 81 and clean the copper strip 80; then the aluminum rod preforming device flattens the aluminum rod, and then the copper-aluminum cladding device clads the copper strip outside the flattened aluminum rod. The welding device welds the joints at both ends of the copper strip to form a copper-clad aluminum flat strip. After welding, it is polished, and then enters the drawing device for stretching and thinning to form a smaller copper-clad aluminum flat strip. The coolant in the drawing device simultaneously inclines the copper-clad aluminum material, and then the rolling device performs multi-stage pressing on the copper-clad aluminum flat strip. The width of the flat strip gradually increases and the thickness gradually decreases. Then the grooving device presses out a reflective groove, such as a V-shaped groove, on one side of the copper-clad aluminum flat strip. Then the heat treatment device adjusts the tensile strength and yield strength of the rolled copper-clad aluminum flat strip and eliminates stress; the heat-treated copper-clad aluminum flat strip is coated with a layer of tin on its outer side after passing through the hot dip tinning device, and the thickness of the tin layer is controlled.

[0028] Specific structure of the aluminum rod preforming device: A pair of end forming rollers 12 arranged front and back are provided on the downstream side of a pair of preforming rollers 11, and a shaping ring groove 13 with a semi-circular cross-section is formed in the middle of the end forming rollers 12; A pair of shaping rollers 14 arranged up and down are provided on the downstream side of a pair of forming rollers 12. The preforming rollers 11, the end forming rollers 12 and the shaping rollers 14 are all rotatably connected to the base of the aluminum rod preforming device. The circular aluminum rod can be flattened by the preforming rollers, the two ends of the aluminum rod can be shaped by the end forming rollers to make them smoother, and then further shaped by the shaping rollers to make it into the required shape, such as a waist shape.

[0029] Specific structure of the copper-aluminum cladding device: As Figure 2 、 Figure 3 shown, the copper-aluminum cladding device 2 includes an aluminum rod guide wheel 21, a copper strip guide wheel 22, a bonding guide wheel 23, a plurality of copper strip turning arc rollers 24 arranged in a gradient manner, and a plurality of copper strip edge pressing rollers 25 arranged in a progressive manner, which are rotatably connected to the cladding base.

[0030] The copper strip arc-turning roller 24 includes a roller base body 241, an arc portion 242 formed at the end of the roller base body 241, and a plane portion 243 tangent to the arc portion 242. The central angles of the arc portions 242 of multiple copper strip arc-turning rollers 24 increase sequentially, and the maximum central angle of the arc portion increases to 90 degrees. The copper strip 80 can be gradually flanged through multiple arc portions, so as to wrap the copper strip 80 on the outer wall of the lower part of the flattened aluminum rod 81.

[0031] The angles θ between multiple copper strip edge-pressing rollers 25 and the horizontal plane decrease sequentially, and the minimum angle of the angle θ is 0 degree. After the copper strip is flanged by the copper strip arc-turning roller, both ends of the copper strip are arranged upward, and then both ends of the copper strip are gradually inclined inward through the copper strip edge-pressing rollers until both ends of the copper strip are abutted against the aluminum rod.

[0032] An aluminum rod positioning roller 26 is arranged above the copper strip arc-turning roller 24, and a positioning flange 261 is arranged at the outer end of the aluminum rod positioning roller 26. The aluminum pipe positioning roller can limit the position of the flattened aluminum rod 81 in the center, so as to ensure the position accuracy of the copper strip 80 coated on the aluminum rod.

[0033] Flange edges 211 are formed at both ends of the aluminum rod guide wheel 21 and the copper strip guide wheel 22. The flattened aluminum rod 81 and the copper strip 80 can be centered by the flange edges, ensuring the accuracy of the feeding position.

[0034] The specific structure of the hot-dip tinning device 3: As Figure 4 shown, the guide wheel A 32 and the guide wheel C 30 are rotatably connected to the moving frame 34. The moving frame 34 is connected with a servo linear module 35 that drives it to move. The servo linear module 35 is electrically connected to the controller. The guide wheel B is rotatably connected to an independent support, and the independent support and the servo linear module are fixed on the frame of the hot-dip tinning device. The servo linear module can drive the moving frame to move, and the moving frame can drive the guide wheel A and the guide wheel C to move, so as to change the relative distance between the guide wheel A and the guide wheel B, and further adjust the path of the welding strip passing through the tinning solution. The longer the path length, the greater the thickness of the tin coating in the later stage, which can meet the requirements of different coating thicknesses.

[0035] The tin plating tank 31 is fixedly installed on the pressure sensor 36, and the pressure sensor 36 is electrically connected to the controller. The height of the tin plating solution in the tin plating tank 31 can be monitored in real time through the pressure sensor 36. When the pressure sensor 36 detects a decrease in the weight of the tin plating tank 31, it indicates that the tin plating solution in the tin plating tank has decreased. At this time, the control servo linear module drives the moving frame to move, and the moving frame drives the guide wheel A 32 and the guide wheel C 30 to move, so that the path length of the solder tape passing through the tin plating solution is always equal, thereby making the tin plating amount on the solder tape more uniform and improving the quality stability of the solder tape. At the same time, when the pressure sensor detects that the tin plating solution in the tin plating tank is less than the set value, a corresponding alarm is issued through the controller to inform the staff to add tin.

[0036] The hot dip tin plating device 3 further includes an air knife 37 and a glass bead spraying mechanism 38 arranged on the downstream side of the air knife 37.

[0037] The glass bead spraying mechanism 38 includes an electrostatic spray gun 381 and a plate electrode 382 respectively arranged on both sides of the solder tape 90. The electrostatic spray gun 381 is connected with a glass bead feed pipe 383. The upstream side of the glass bead feed pipe 383 is provided with a glass bead feed flow control device and is transported to the electrostatic spray gun through high-pressure gas. After the electrostatic spray gun is electrified, the glass beads are accelerated again, so that the glass beads are ejected onto the temporarily solidified tin layer of the solder tape, and finally the glass beads are fixed after the tin layer solidifies.

[0038] The particle size of the glass beads ejected by the electrostatic spray gun 381 is 0.1 - 3 μm, and the refractive index of the glass beads is 1.5 - 2.0.

[0039] A ceramic sheath 39 is arranged between the air knife 37 and the guide wheel B 33, and the lower end of the ceramic sheath 39 extends into the tin solution in the tin plating tank 31. The tin plating solution in the tin plating tank will float to the surface of the tin plating solution due to oxidation or impurities inside its material. The ceramic sheath can effectively block the floating substances and prevent the solder tape from taking away the floating substances and affecting the quality.

[0040] At least two tin solution preliminary precipitation rollers 40 are arranged in the ceramic sheath 39. The solder tape bypasses the tin solution preliminary precipitation rollers in sequence. Through the tin solution preliminary precipitation rollers, the excess washing solution on the solder tape can be preliminarily peeled off, and then the tin layer thickness of the solder tape can be further thinned and controlled through the air knife.

[0041] Copper-clad aluminum reflective tape, such as Figure 5 shown, includes an aluminum core layer 901, a copper layer 902 coated on the outside of the aluminum core layer 901, a tin layer 903 arranged on the outside of the copper layer 902, and a glass bead layer 904 is arranged on one side of the tin layer 903. The glass bead layer 904 is dispersed on the surface of the tin layer 903 or embedded inside the tin layer 903.

[0042] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. Copper-clad aluminum reflective tape production line, including copper-aluminum cladding device (2), welding device, drawing device, rolling device, grooving device, heat treatment device, hot dip tinning device (3) and winding device, characterized in that: An aluminum rod preforming device (1) is provided on the upstream side of the copper-aluminum cladding device (2); the aluminum rod preforming device (1) includes a pair of preforming pressure wheels (11) arranged vertically. The hot dip tinning device (3) includes a tinning tank (31), guide wheels A (32) and guide wheels B (33) arranged in the tinning tank (31), and a guide wheel C (30) arranged above the tinning tank (31) and above the guide wheel A. The guide wheels A (32) and guide wheels C (30) can translate relative to the guide wheels B (33).

2. The copper-clad aluminum reflective tape production line according to claim 1, characterized in that: A pair of end forming rollers (12) arranged front and back are provided on the downstream side of the pair of preforming pressure wheels (11). A shaping ring groove (13) with a semicircular cross-section is formed in the middle of the end forming rollers (12). A pair of shaping pressure wheels (14) arranged vertically are provided on the downstream side of the pair of forming rollers (12).

3. The copper-clad aluminum reflective tape production line according to claim 1, characterized in that: The guide wheels A (32) and guide wheels C (30) are rotatably connected to a moving frame (34), and the moving frame (34) is connected to a servo linear module (35) that drives it to move.

4. The copper-clad aluminum reflective tape production line according to claim 3, characterized in that: The tinning tank (31) is fixedly arranged on a pressure sensor (36).

5. The copper-clad aluminum reflective tape production line according to claim 1, characterized in that: The copper-aluminum cladding device (2) includes an aluminum rod guide wheel (21), a copper strip guide wheel (22), a combining guide wheel (23), a plurality of copper strip arc-turning rollers (24) arranged with a gradual change, and a plurality of copper strip edge-pressing rollers (25) arranged progressively. The copper strip arc-turning roller (24) includes a roller base body (241), an arc portion (242) formed at the end of the roller base body (241), and a plane portion (243) tangent to the arc portion (242). The angles θ of the plurality of copper strip edge-pressing rollers (25) with the horizontal plane gradually decrease in sequence.

6. The copper-clad aluminum reflective tape production line according to claim 5, characterized in that: An aluminum rod positioning roller (26) is provided above the copper strip arc-turning roller (24), and a positioning flange (261) is provided at the outer end of the aluminum rod positioning roller (26). Edges (211) are formed at both ends of the aluminum rod guide wheel (21) and the copper strip guide wheel (22).

7. The copper-clad aluminum reflective tape production line according to claim 1, characterized in that: The hot dip tinning device (3) further includes an air knife (37) and a glass bead spraying mechanism (38) arranged on the downstream side of the air knife (37). The glass bead spraying mechanism (38) includes an electrostatic spray gun (381) and a plate electrode (382) respectively arranged on both sides of the solder tape (90). The electrostatic spray gun (381) is connected to a glass bead feed pipe (383).

8. The copper-clad aluminum reflective tape production line according to claim 7, characterized in that: The particle size of the glass beads ejected by the electrostatic spray gun (381) is 0.1 - 3 μm; the refractive index of the glass beads is 1.5 - 2.

0.

9. The copper-clad aluminum reflective tape production line according to claim 7, wherein: A ceramic sheath (39) is provided between the air knife (37) and the guide wheel B (33), and the lower end of the ceramic sheath (39) extends into the tin bath of the tinning tank (31). At least two tin bath preliminary precipitation rods (40) are arranged in the ceramic sheath (39).

10. The copper-clad aluminum reflective tape produced by the copper-clad aluminum reflective tape production line according to claim 7 or 8 or 9, characterized in that: It includes an aluminum core layer (901), a copper layer (902) coated outside the aluminum core layer (901), a tin layer (903) arranged outside the copper layer (902), a glass bead layer (904) is provided on one side of the tin layer (903), and the glass bead layer (904) is dispersed on the surface of the tin layer (903) or embedded inside the tin layer (903).

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