A local roughening device and roughening method for the silver surface of an LED bracket

Abstract

The present invention relates to a local roughening device for the silver surface of an LED bracket and a roughening method thereof. The roughening device includes a spray device, an upper template, a lower template, a mounting frame and a lifting device. The lifting device is used to drive the upper template to rise and fall. The spray device includes a metal nozzle for connecting to the positive pole of a power supply. The LED bracket is connected to the negative pole of the power supply. The upper template and the lower template are used to clamp the LED bracket. The lower template is provided with a hollow hole for exposing the area to be roughened on the silver surface of the LED bracket. The spray device is used to spray the roughening solution on the area to be roughened on the silver surface of the LED bracket to perform anode roughening of the silver surface. The present application can improve the bonding force between the LED bracket and the plastic sealant by selectively roughening the hollow part and the semi-etched area of ​​the LED bracket, thereby improving the airtightness of the LED device after plastic sealing. At the same time, it can also prevent the bright silver surface of other areas from being roughened, without changing the original brightness and other properties of the LED bracket.

Description

Technical Field

[0001] The present application relates to the technical field of manufacturing LED brackets, and in particular to a device for roughening a silver surface of an LED bracket and a roughening method thereof. Background Art

[0002] The LED bracket is the carrier of the LED device. It plays multiple roles such as carrying chips, supporting packaging, protecting welding wires, conducting electricity, dissipating heat, reflecting light, etc. It has a significant impact on the optoelectronic performance and reliability of LEDs. The bonding strength between the LED bracket and the plastic sealant is very strong. If moisture seeps between the two, it will cause the plastic sealant and the LED bracket to delaminate, and may even cause serious situations such as breaking the welding wires and causing circuit interruptions. Therefore, improving the airtightness of LED devices can start from the design of the LED bracket, such as designing a moisture-proof structure and extending the moisture infiltration path. Figure 1 and Figure 2 Some models of LED brackets 100 have hollow parts or half-etched parts ( Figure 2 The roughened area 101 in the middle is involved in the packaging, so the bonding force between the LED bracket 100 and the plastic sealant 102 can be enhanced by increasing the roughness of the side surface of the LED bracket 100 and the semi-etched position, thereby improving the airtightness of the LED device.

[0003] Since the final coating of the LED bracket is a bright silver layer, any roughened coating before silver plating will reduce the roughness due to the filling of bright silver, resulting in cost waste. In addition, for the LED bracket, it not only serves as a substrate but also plays a reflective role. Therefore, the overall surface roughening treatment cannot be performed after silver plating. Therefore, it is necessary to develop a reliable silver surface local roughening technology. Summary of the invention

[0004] In order to solve the technical problem that the existing LED bracket cannot be roughened on the entire surface after silver plating, the present invention provides a device for roughening the silver surface of an LED bracket and a roughening method thereof.

[0005] On the one hand, the present application provides a device for local roughening of the silver surface of an LED bracket, comprising a spray device, an upper template, a lower template, a mounting frame and a lifting device, wherein the lifting device is arranged on the mounting frame, and the lifting device is used to drive the upper template to rise and fall, the spray device comprises a metal nozzle for connecting to the positive pole of a power supply, and the LED bracket is connected to the negative pole of the power supply, the upper template and the lower template are used to clamp the LED bracket, and the lower template is provided with a hollow hole for exposing the area to be roughened on the silver surface of the LED bracket, and the spray device is used to spray the roughening solution on the area to be roughened on the silver surface of the LED bracket to perform anodic roughening of the silver surface.

[0006] By adopting the above technical scheme, the present application can realize the local selective roughening of the silver surface of the LED bracket by setting a spray device, an upper template and a lower template. The upper template and the lower template clamp the LED bracket to realize the edge sealing of the LED bracket. A hollow hole is opened on the lower template. The spray device can spray the roughening solution on the area to be roughened of the LED bracket. Then the metal nozzle is connected to the positive pole of the power supply, and the LED bracket is connected to the negative pole of the power supply to realize the anode roughening of the area to be roughened. The silver surface in other areas is sealed by the upper template and the lower template, isolated from the roughening solution, and will not be roughened. The present application selectively roughens the hollow part and the semi-etched area of ​​the LED bracket, which can improve the bonding strength between the LED bracket and the plastic sealant, thereby improving the airtightness of the LED device after plastic sealing, and can pass the high-level red ink test. At the same time, it can also prevent the bright silver surface in other areas from being roughened, and does not change the original brightness and other performances of the LED bracket; in addition, the present application also has the advantages of stable process, high yield rate and low cost.

[0007] Preferably, the roughening solution is K 2 CO 3 Solution or Na 2 CO 3 Solution.

[0008] By adopting the above technical scheme, the silver surface is subjected to anodic electrolysis in a roughening solution, and the roughness of the silver surface is improved by the lattice expansion caused by the oxidation of the silver surface. This application does not use corrosive roughening of the silver surface, but electrochemical roughening, which can save the cost of precious metals, the roughening effect is easy to control, the process is simple, the cost is low, and the yield rate is high.

[0009] Preferably, the spray device comprises, from bottom to top, a bottom plate, a first-level steady-flow water bladder, a first-level water baffle, a second-level steady-flow water bladder, a second-level water baffle, a trough bladder and a nozzle plate, the first-level water baffle and the second-level water baffle are both provided with a plurality of overflow holes in an array, the first-level water baffle is arranged on the first-level steady-flow water bladder, the second-level water baffle is arranged on the second-level steady-flow water bladder, a plurality of metal nozzles are arranged in an array on the nozzle plate, the lower template is arranged on the trough bladder, a water inlet is provided on the bottom plate, water flows into the first-level steady-flow water bladder, the second-level steady-flow water bladder and the trough bladder in turn, and is sprayed out from the metal nozzle, and a drainage groove is provided on the trough bladder for draining the roughening solution sprayed from the metal nozzle to the outside of the trough bladder.

[0010] By adopting the above technical solution, the stability and uniformity of the spray water flow can be improved.

[0011] Preferably, a water retaining area is provided on the first-level water retaining plate, and the water retaining area corresponds to the position of the water inlet of the bottom plate.

[0012] By adopting the above technical solution, the roughening solution enters from the water inlet of the bottom plate and will be sprayed on the water retaining area on the first-level water retaining plate. The water retaining area will block all the water columns and then slowly fill the first-level flow stabilizing water tank, and the water flow tends to be stable.

[0013] Preferably, the lower template is made of soft rubber material, and the inner surface of the hollow hole is provided with a chamfer to form a bell mouth facing downward.

[0014] By adopting the above technical solution, since the hollow hole is in an outer trumpet shape, the roughening solution can enter the hollow hole more smoothly and reach the lower surface of the LED bracket to perform an anode roughening reaction, which is not easy to affect the roughening efficiency and effect.

[0015] Preferably, the roughening equipment also includes a tab pulling device, a roughening cylinder, a front water washing cylinder, a rear water washing cylinder, a front tab dropping cylinder and a rear tab dropping cylinder, which are used to continuously roughen the LED bracket material strip, and the spray device, the upper template and the lower template are all arranged in the roughening cylinder, and the bottom of the roughening cylinder is provided with an upper water inlet and a drain outlet, and the upper water inlet is connected to the water inlet on the bottom plate of the spray device; the front water washing cylinder is used to wash and clean the LED bracket before roughening, and the rear water washing cylinder is used to wash and clean the LED bracket after roughening, the front tab dropping cylinder and the rear tab dropping cylinder are used to accommodate the feeding redundancy of the LED bracket material strip, and the tab pulling device is used to pull the LED bracket material strip forward intermittently.

[0016] By adopting the above technical solution, the roughening equipment described in the present application adopts a continuous pressing plate mode to achieve continuous processing and can be applied to a continuous LED bracket production line.

[0017] On the other hand, the present application provides a roughening method of the above-mentioned silver surface local roughening device of the LED bracket, comprising the following steps:

[0018] S1: Reserve a set length of LED bracket strips in the front and rear film dropping cylinders;

[0019] S2: Use the pull-tab device to pull the LED bracket material belt forward, so that the LED bracket material belt enters the roughening tank from the front washing tank;

[0020] S3: Use the lifting device to move the upper template downward, and press the LED bracket strip between the upper template and the lower template;

[0021] S4: Start the spraying device, and the roughening solution is sprayed upward from the metal nozzle, passes through the hollow holes on the lower template, and sprays to the roughening area of ​​the LED bracket. At this time, the LED bracket strip is connected to the negative pole of the power supply, and the metal nozzle is connected to the positive pole of the power supply;

[0022] S5: After the spraying reaches the preset time, the roughening is completed and the spraying stops;

[0023] S6: Use the lifting device to move the upper template upward and loosen the LED bracket strip;

[0024] S7: Use the pull-tab device to pull the LED bracket material belt forward again, and the LED bracket material belt enters the rear washing tank from the roughening tank;

[0025] S8: Repeat the above steps to allow the LED bracket material strip to enter the rear film dropping tank from the rear water washing tank.

[0026] By adopting the above technical solution, the roughening described in the present application can achieve continuous processing and can be applied to a continuous LED bracket production line.

[0027] Preferably, in step S4, the roughening solution is 35 g / L K 2 CO 3 Solution or Na 2 CO 3 Solution, coarsening temperature is 20-25℃.

[0028] By adopting the above technical solution, the silver surface is subjected to anodic electrolysis in a roughening solution, and the roughness of the silver surface is improved by the lattice expansion caused by the oxidation of the silver surface.

[0029] Preferably, before step S1, a pre-treatment step of removing oil from the LED bracket strip is also included, which specifically includes the following sub-steps:

[0030] S0.1: Cathode degreasing: At 60°C, use 30 g / L KOH solution to perform cathode electrolytic degreasing on the LED bracket strip connected to the positive pole of the power supply;

[0031] S0.2: Wash with water;

[0032] S0.3: Sulfuric acid washing, use 10% sulfuric acid solution at room temperature to neutralize the strong alkali.

[0033] By adopting the above technical solution, the cleanliness of the LED can be guaranteed.

[0034] Preferably, after step S8, a post-processing step is further included, specifically including the following steps:

[0035] S9: cathode electrolysis, at 20-25°C, the LED bracket material strip is connected to the positive electrode of the power supply for electrolysis under the spraying of 30g / L KOH solution;

[0036] S10: washing with water;

[0037] S11: Perform sulfuric acid washing, using 5%-8% sulfuric acid solution to neutralize the strong alkali at room temperature;

[0038] S12: washing with water;

[0039] S13: Anti-oxidation treatment of the silver surface;

[0040] S14: Drying.

[0041] By adopting the above technical solution, since the silver surface after roughening in step S4 is relatively rough, there are many holes, and there are many tiny particles in the holes, which are not easy to clean. This application adopts the cathode electrolysis method in S9, and the bubbles generated by electrolysis are used to drive away the tiny particles in the holes, and the cleaning effect is good.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. The present application can achieve local selective roughening of the silver surface of the LED bracket by setting a spray device, an upper template and a lower template. The present application selectively roughens the hollow part and the semi-etched area of ​​the LED bracket, which can improve the bonding force between the LED bracket and the plastic sealant, thereby improving the airtightness of the LED device after plastic sealing, and can pass the high-level red ink test. At the same time, it can also prevent the bright silver surface of other areas from being roughened, and does not change the original brightness and other performances of the LED bracket;

[0044] 2. This application also has the advantages of stable process, high yield and low cost;

[0045] 3. Adopt continuous pressing mode to realize continuous processing, which can be applied to continuous LED bracket production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the cross-sectional structure of the LED bracket after plastic sealing is drawn;

[0047] Figure 2 A schematic diagram showing the highlighting of the silver surface to be roughened of the LED bracket is depicted;

[0048] Figure 3 A three-dimensional diagram of the first embodiment of the silver surface local roughening device described in the present application is depicted;

[0049] Figure 4 A schematic diagram of the exploded structure of the first embodiment of the silver surface local roughening device described in the present application is depicted;

[0050] Figure 5 A half-section schematic diagram of the first embodiment of the silver surface local roughening device described in the present application is depicted;

[0051] Figure 6 A schematic diagram of the state of the upper template and the lower template after being pressed together in the first embodiment of the silver surface local roughening equipment described in the present application is depicted;

[0052] Figure 7 A partial structural schematic diagram of an LED bracket to be roughened in the first embodiment of the present application is depicted;

[0053] Figure 8 A top view of the lower template in the first embodiment of the present application is depicted;

[0054] Fig. 9 A schematic diagram of the matching relationship between the upper template, the lower template, the LED bracket and the metal nozzle in the first embodiment of the present application is depicted;

[0055] Fig.10 A partial structural schematic diagram of the metal nozzle described in the present application is depicted;

[0056] Fig.11 A three-dimensional diagram of the second embodiment of the silver surface local roughening device described in the present application is shown.

[0057] Explanation of the reference numerals: 10, spray device; 11, metal nozzle; 12, bottom plate; 121, water inlet; 13, first-level steady-flow water bladder; 14, first-level water baffle; 141, overflow hole; 142, water retaining area; 15, second-level steady-flow water bladder; 16, second-level water baffle; 161, overflow hole; 17, trough bladder; 171, drainage trough; 18, nozzle plate; 20, upper template; 30, lower template; 31, hollow hole; 32, chamfer; 40, mounting frame; 50, lifting device; 60, film pulling device; 70, roughening cylinder; 701, water inlet; 702, drain outlet; 71, front water washing cylinder; 72, rear water washing cylinder; 73, front film dropping cylinder; 74, rear film dropping cylinder; 100, LED bracket; 101, area to be roughened; 102, plastic sealing glue. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-11 This application is described in further detail.

[0059] Embodiment 1:

[0060] Reference Figure 1 and Figure 2 The embodiment of the present application discloses a device for local roughening of the silver surface of an LED bracket, comprising a spray device 10, an upper template 20, a lower template 30, a mounting frame 40 and a lifting device 50, wherein the lifting device 50 is arranged on the mounting frame 40, and the lifting device 50 is used to drive the upper template 20 to rise and fall, the spray device 10 comprises a metal nozzle 11, which is used to connect the positive pole of the power supply, and the LED bracket 100 is connected to the negative pole of the power supply, the upper template 20 and the lower template 30 are used to clamp the LED bracket 100, and the lower template 30 is provided with a hollow hole 31, which is used to expose the area 101 to be roughened on the silver surface of the LED bracket 100, and the spray device 10 is used to spray the roughening solution on the area 101 to be roughened on the silver surface of the LED bracket 100 to perform anodic roughening of the silver surface.

[0061] In an embodiment, the roughening solution is K 2 CO3 Solution or Na 2 CO 3 Solution, by electrolyzing the silver surface in the roughening solution, the silver surface roughness is improved by the lattice expansion caused by the oxidation of the silver surface. Generally, the temperature of the roughening solution can be selected at 20-25℃, K 2 CO 3 The concentration of the solution can be selected as 35g / L, and of course it can be adjusted according to actual needs.

[0062] Reference Figure 3 The pressing force between the upper template 20 and the lower template 30 is adjusted by the lifting device 50. The lifting device 50 is preferably a cylinder, and the pressing force is easy to adjust and relatively stable. The upper template 20 is a flat plate, which can be a hard plate or a soft plate made of materials such as silicone and rubber. The soft plate can reduce the pressure damage to the surface of the LED bracket 100; the lower template 30 is made of soft rubber material, such as silicone or rubber, so that when the upper template 20 and the lower template 30 are pressed together, the periphery of the LED bracket 100 can be sealed to isolate the roughening solution.

[0063] The roughening method of the roughening device in this embodiment includes the following steps:

[0064] Place the LED bracket 100 on the lower template 30;

[0065] The upper template 20 is driven downward by the lifting device 50 to press the LED bracket 100 between the upper template 20 and the lower template 30;

[0066] The spray device 10 is started, and the roughening solution is sprayed upward from the metal nozzle 11, passes through the hollow hole 31 on the lower template 30, and sprays to the roughening area 101 of the LED bracket 100. At this time, the LED bracket 100 is connected to the negative pole of the power supply, and the metal nozzle 11 is connected to the positive pole of the power supply, and the LED bracket 100 is subjected to anodic roughening (also known as anodic electrolysis or anodic oxidation);

[0067] After the spraying reaches the preset time, the roughening is completed and the spraying stops;

[0068] The upper template 20 is moved upward by using the lifting device 50 , the LED bracket 100 is released, and the LED bracket 100 is taken out.

[0069] The present application does not use corrosive roughening of the silver surface, but electrochemical roughening, which can save precious metal costs, the roughening effect is easy to control, the process is simple, the cost is low, and the yield rate is high.

[0070] Reference Figure 4 and Figure 5In order to improve the stability and uniformity of the spray water flow, the spray device 10 includes a bottom plate 12, a first-level steady flow water bladder 13, a first-level water baffle 14, a second-level steady flow water bladder 15, a second-level water baffle 16, a groove bladder 17 and a nozzle plate 18 from bottom to top. The first-level water baffle 14 and the second-level water baffle 16 are both provided with a plurality of overflow holes 141 and 161 in an array. The first-level water baffle 14 is arranged on the first-level steady flow water bladder 13, the second-level water baffle 16 is arranged on the second-level steady flow water bladder 15, and a plurality of metal nozzles 11 are arranged in an array on the nozzle plate 18. The lower template 30 is arranged on the groove bladder 17, and a water inlet 121 is provided on the bottom plate 12. The water flow enters the first-level steady flow water bladder 13, the second-level steady flow water bladder 15 and the groove bladder 17 in sequence, and is sprayed out from the metal nozzle 11. The groove bladder 17 is provided with a drainage groove 171 for draining the roughening solution sprayed by the metal nozzle 11 to the outside of the groove bladder 17.

[0071] Reference Figure 4 and Figure 5 The first-level water retaining plate 14 is provided with a water retaining area 142 , and the water retaining area 142 corresponds to the position of the water inlet 121 of the bottom plate 12 .

[0072] The roughening solution enters from the water inlet 121 of the bottom plate 12, and will be sprayed on the water retaining area 142 on the first-level water retaining plate 14. The water retaining area 142 will completely block the water column, and then slowly fill the first-level steady flow water bladder 13, and the water flow tends to be stable; after the first-level steady flow water bladder 13 is filled, it will overflow upward from the overflow hole 141 on the first-level water retaining plate 14, and the first-level water retaining plate 14 will further slowly increase the water level in the second-level steady flow water bladder 15. The function of the second-level water retaining plate 16 is also to stabilize the water flow. When the roughening solution enters the trough 17, it is already very stable, the water pressure is uniform, and the consistency of the water columns sprayed out by the multiple metal nozzles 11 is very high, thereby effectively ensuring the high consistency of the roughening degree of all the areas 101 to be roughened of the LED bracket 100.

[0073] Reference Fig.10 Since the functional units on the LED bracket 100 are generally small in size, the aperture of the metal nozzle 11 should also be relatively small. The water column sprayed by a single metal nozzle 11 should have strong penetrating power, and then a large number of them are arrayed to form a water wall to make the spray more uniform.

[0074] The spray device 10 sprays the roughening solution from bottom to top. If the roughening area 101 on the LED bracket 100 is narrow, the hollow hole 31 on the lower template 30 will also be narrow, and the roughening solution will have difficulty passing through the hollow hole 31 to reach the lower surface of the LED bracket 100, which affects the roughening efficiency and effect. Fig. 9The lower template 30 is made of soft rubber material, and the inner surface of the hollow hole 31 is provided with a chamfer 32 to form a downward-facing trumpet mouth. Since the hollow hole 31 is in an outer trumpet shape, the roughening solution can enter the hollow hole 31 more smoothly and reach the lower surface of the LED bracket 100 to perform an anodic roughening reaction, which is not easy to affect the roughening efficiency and effect.

[0075] The present application can achieve local selective roughening of the silver surface of the LED bracket 100 by setting up a spray device 10, an upper template 20 and a lower template 30. The upper template 20 and the lower template 30 clamp the LED bracket 100 to achieve edge sealing of the LED bracket 100. A hollow hole 31 is opened on the lower template 30. The spray device 10 can spray the roughening solution on the roughening area 101 of the LED bracket 100, and then the metal nozzle 11 is connected to the positive pole of the power supply, and the LED bracket 100 is connected to the negative pole of the power supply to achieve anodic roughening of the roughening area 101. The silver surfaces in other areas are sealed by the upper template 20 and the lower template 30, isolated from the roughening solution, and will not be roughened. The present application selectively roughens the hollowed-out portion and the half-etched area of ​​the LED bracket 100, which can improve the bonding strength between the LED bracket 100 and the plastic encapsulation adhesive 102, thereby improving the airtightness of the LED device after plastic encapsulation, and can pass a high-level red ink test. At the same time, it can also prevent the bright silver surface of other areas from being roughened, and does not change the original brightness and other performances of the LED bracket 100; in addition, the present application also has the advantages of stable process, high yield rate, and low cost.

[0076] Embodiment 2:

[0077] Reference Fig.11 , which is different from the first embodiment in that the local roughening device for the silver surface of the LED bracket can be applied to the continuous LED bracket 100 production line, and the roughening device also includes a pull-tab device 60, a roughening cylinder 70, a front water washing cylinder 71, a rear water washing cylinder 72, a front film-dropping cylinder 73 and a rear film-dropping cylinder 74, which are used to continuously roughen the LED bracket material strip, and the spray device 10, the upper template 20 and the lower template 30 are all arranged in the roughening cylinder 70, and the bottom of the roughening cylinder 70 is provided with an upper water inlet 701 and a drain outlet 702, and the upper water inlet 701 is connected to the water inlet 121 on the bottom plate 12 of the spray device 10; the front water washing cylinder 71 is used to wash and clean the LED bracket material strip before roughening, and the rear water washing cylinder 72 is used to wash and clean the LED bracket material strip after roughening, and the front film-dropping cylinder 73 and the rear film-dropping cylinder 74 are used to accommodate the feeding redundancy of the LED bracket material strip, and the pull-tab device 60 is used to pull the LED bracket material strip intermittently forward.

[0078] The roughening method of the silver surface local roughening device of the LED bracket 100 described in this embodiment includes the following steps:

[0079] The pre-treatment step of removing oil from the LED bracket material strip is used to ensure the cleanliness of the surface of the LED bracket 100, and specifically includes the following sub-steps:

[0080] S0.1: Cathode degreasing: At 60°C, use 30 g / L KOH solution to perform cathode electrolytic degreasing on the LED bracket strip connected to the positive pole of the power supply;

[0081] S0.2: Wash with water;

[0082] S0.3: Sulfuric acid washing, use 10% sulfuric acid solution at room temperature to neutralize the strong alkali.

[0083] The following are the key steps for local roughening of the silver surface.

[0084] S1: Reserve a set length of LED bracket strip in the front film dropping cylinder 73 and the rear film dropping cylinder 74;

[0085] S2: Use the pull-tab device 60 to pull the LED bracket material belt forward, so that the LED bracket material belt enters the roughening tank 70 from the front washing tank 71;

[0086] S3: Use the lifting device 50 to drive the upper template 20 to move downward, and press the LED bracket strip between the upper template 20 and the lower template 30;

[0087] S4: Start the spray device 10, and the roughening solution is sprayed upward from the metal nozzle 11, passes through the hollow hole 31 on the lower template 30, and sprays to the roughening area 101 of the LED bracket 100. At this time, the material strip of the LED bracket 100 is connected to the negative pole of the power supply, and the metal nozzle 11 is connected to the positive pole of the power supply;

[0088] S5: After the spraying reaches the preset time, the roughening is completed and the spraying stops;

[0089] S6: Use the lifting device 50 to drive the upper template 20 to move upward and loosen the LED bracket strip;

[0090] S7: Use the pull-tab device 60 to pull the LED bracket material belt forward again, and the LED bracket material belt enters the post-washing tank 72 from the roughening tank 70;

[0091] S8: Repeat the above steps to allow the LED bracket strip to enter the rear film dropping cylinder 74 from the rear water washing cylinder 72 .

[0092] After the local roughening of the silver surface is completed, a post-processing step is also included, which specifically includes the following steps:

[0093] S9: cathode electrolysis, at 20-25°C, the LED bracket material strip is connected to the positive electrode of the power supply for electrolysis under the spraying of 30g / L KOH solution;

[0094] S10: washing with water;

[0095] S11: Perform sulfuric acid washing, using 5%-8% sulfuric acid solution to neutralize the strong alkali at room temperature;

[0096] S12: washing with water;

[0097] S13: Anti-oxidation treatment of the silver surface;

[0098] S14: Drying.

[0099] In this embodiment, in step S4, the roughening solution is 35 g / L K 2 CO 3 Solution or Na 2 CO 3 The roughening temperature of the solution is preferably 20-25°C.

[0100] Since the silver surface after roughening in step S4 is relatively rough, there are many holes, and there are many tiny particles in the holes, which are not easy to clean. The present application adopts the cathode electrolysis method in S9, and the bubbles generated by electrolysis drive away the tiny particles in the holes, which has a good cleaning effect.

[0101] The LED bracket material belt is in a static state during the spray roughening process. Therefore, when the processes at the front and rear ends of the roughening process need to be fed continuously or the feeding rhythm is inconsistent, it is necessary to set the front film dropping cylinder 73 and the rear film dropping cylinder 74. The LED bracket material belt naturally droops in the front film dropping cylinder 73 and the rear film dropping cylinder 74. When the front and rear processes need to feed, the LED bracket material belt will become shorter, but it will not be tightened, and will not affect the feeding and discharging of the front and rear processes.

[0102] This embodiment adopts a continuous pressing plate mode to achieve continuous processing and can be applied to a continuous LED bracket production line.

[0103] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for roughening the silver surface of an LED bracket. It is characterized in that The invention comprises a spray device (10), an upper template (20), a lower template (30), a mounting frame (40) and a lifting device (50); the lifting device (50) is arranged on the mounting frame (40) and is used to drive the upper template (20) to move up and down; the spray device (10) comprises a metal nozzle (11); the metal nozzle (11) and the LED bracket (100) are respectively connected to two poles of a power supply; the upper template (20) and the lower template (30) are used to clamp the LED bracket (100); the lower template (30) is provided with a hollow hole (31) for exposing a roughening area (101) on the silver surface of the LED bracket (100); the spray device (10) is used to spray a roughening solution on the roughening area (101) on the silver surface of the LED bracket (100) to perform anodizing of the silver surface; The lower template (30) is made of a soft rubber material, and the inner surface of the hollow hole (31) is provided with a chamfer (32) for forming a downwardly directed bell mouth to expose the roughening area (101) of the silver surface of the LED bracket (100) and guide the flow direction of the roughening liquid; The spray device (10) comprises, from bottom to top, a bottom plate (12), a first-level stabilizing water bladder (13), a first-level water baffle (14), a second-level stabilizing water bladder (15), a second-level water baffle (16), a groove bladder (17) and a nozzle plate (18); the first-level water baffle (14) and the second-level water baffle (16) are both provided with a plurality of overflow holes (141, 161) in an array for stabilizing water flow; the first-level water baffle (14) is arranged on the first-level stabilizing water bladder (13), and the second-level water baffle (16) is arranged on the second-level water baffle (16). On the flow-stabilizing water bladder (15), a plurality of metal nozzles (11) are arranged in an array on the nozzle plate (18), the lower template (30) is arranged on the groove bladder (17), and a water inlet (121) is provided on the bottom plate (12), and water flows sequentially into the first-stage flow-stabilizing water bladder (13), the second-stage flow-stabilizing water bladder (15), and the groove bladder (17), and is sprayed out from the metal nozzle (11); the groove bladder (17) is provided with a drainage groove (171) for draining the roughening liquid sprayed from the metal nozzle (11) to the outside of the groove bladder (17).

2. The local roughening device for the silver surface of the LED bracket according to claim 1, It is characterized in that The roughening solution is K 2 CO 3 Solution or Na 2 CO 3 Solution.

3. The silver surface local roughening device of the LED bracket according to claim 1, It is characterized in that The primary water retaining plate (14) is provided with a water retaining area (142), and the water retaining area (142) corresponds to the position of the water inlet (121) of the bottom plate (12).

4. The silver surface local roughening device of the LED bracket according to claim 1, It is characterized in that The roughening equipment further comprises a sheet pulling device (60), a roughening cylinder (70), a front water washing cylinder (71), a rear water washing cylinder (72), a front sheet dropping cylinder (73) and a rear sheet dropping cylinder (74), which are used to continuously roughen the LED bracket material strip. The spray device (10), the upper template (20) and the lower template (30) are all arranged in the roughening cylinder (70). The bottom of the roughening cylinder (70) is provided with a water inlet (701) and a water outlet (702). The water inlet ( 701) is connected to the water inlet (121) on the bottom plate (12) of the spray device (10); the front water washing cylinder (71) is used to wash and clean the LED bracket material strip before roughening, and the rear water washing cylinder (72) is used to wash and clean the LED bracket material strip after roughening. The front film dropping cylinder (73) and the rear film dropping cylinder (74) are used to accommodate the feed redundancy of the LED bracket material strip, and the pulling device (60) is used to pull the LED bracket material strip intermittently forward.

5. A roughening method for the silver surface local roughening device of the LED bracket according to claim 4, It is characterized in that The following steps are involved: S1: A LED bracket strip of a set length is reserved in the front film dropping cylinder (73) and the rear film dropping cylinder (74); S2: Using the pull-tab device (60) to pull the LED bracket material belt forward, so that the LED bracket material belt enters the roughening tank (70) from the front washing tank (71); S3: using the lifting device (50) to drive the upper template (20) to move downward, and pressing the LED bracket strip between the upper template (20) and the lower template (30); S4: The spraying device (10) is started, and the roughening liquid is sprayed upward from the metal nozzle (11), passes through the hollow hole (31) on the lower template (30), and sprays onto the roughening area (101) of the LED bracket (100). At this time, the LED bracket material strip and the metal nozzle (11) are respectively connected to the two poles of the power supply; S5: After the spraying reaches the preset time, the roughening is completed and the spraying stops; S6: Using the lifting device (50) to drive the upper template (20) to move upward, and loosen the LED bracket material strip; S7: Using the pull-tab device (60) to pull the LED bracket material belt forward again, the LED bracket material belt enters the post-washing tank (72) from the roughening tank (70); S8: Repeat the above steps to allow the LED bracket strip to enter the rear film dropping tank (74) from the rear water washing tank (72).

6. The roughening method according to claim 5, It is characterized in that In step S4, the roughening solution is 35 g / L K 2 CO 3 Solution or Na 2 CO 3 Solution, coarsening temperature is 20-25℃.

7. The roughening method according to claim 5, It is characterized in that Before step S1, a pre-treatment step of removing oil from the LED bracket strip is also included, which specifically includes the following sub-steps: S0.1: Cathode degreasing: At 60°C, use 30 g / L KOH solution to connect the LED bracket strip to the power supply for cathode electrolytic degreasing; S0.2: Wash with water; S0.3: Sulfuric acid washing: use 10% sulfuric acid solution at room temperature to neutralize the strong alkali.

8. The roughening method according to claim 5, It is characterized in that After step S8, a post-processing step is also included, which specifically includes the following steps: S9: cathode electrolysis, at 20-25°C, the LED bracket material strip is sprayed with 30g / L KOH solution and connected to a power source for electrolysis; S10: washing with water; S11: Perform sulfuric acid washing, using 5%-8% sulfuric acid solution to neutralize the strong alkali at room temperature; S12: washing with water; S13: Anti-oxidation treatment of the silver surface; S14: Drying.

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