An anti-oxidation coating encapsulation device for an electrode pin of an LED lamp bead
Patent Information
- Application Number
- CN202611269924.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-20
- Publication Date
- 2026-10-16
AI Technical Summary
其一，传统镀锡设备多采用垂直直线升降进出锡液的作业方式，引脚垂直浸入锡液时易裹挟空气，在镀层表面形成气泡、针孔缺陷，导致镀锡层疏松不致密，防氧化防护效果大幅降低；同时直线浸锡热冲击集中，易出现镀层厚薄不均、堆锡、漏镀等质量问题，批量产品一致性差
[0021] By driving the gears and ring gears to mesh and transmit power, and with the precise positioning of the guide shaft and guide ring groove, the traditional linear lifting and lowering tinning method of the LED lamp bead is changed. The LED lamp bead electrode pins gradually cut into and detach from the molten solder along an arc trajectory. The molten solder can slowly climb and wet the pin surface, effectively avoiding the problem of air encapsulation, greatly reducing plating bubbles and pinhole defects, making the tin plating layer on the pin surface more continuous and dense, and fundamentally improving the anti-oxidation performance and plating reliability of the electrode pins.
Smart Images
Figure CN122918485A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of anti-oxidation processing technology for electrode pins, specifically to an anti-oxidation coating encapsulation device for LED lamp bead electrode pins. Background Technology
[0002] LED lamp bead electrode leads are mostly made of copper substrate, which is extremely susceptible to oxidation and corrosion by oxygen and moisture in the air. This leads to a decrease in the solderability of the leads and an increase in contact resistance, which seriously affects the conductivity, welding reliability and overall lifespan of the LED lamp bead. Therefore, the industry generally adopts the lead tin plating process to form a dense anti-oxidation coating to achieve protective encapsulation of the electrode leads.
[0003] Currently, existing LED lead tin plating equipment still suffers from numerous technical defects in practical production applications, severely restricting the improvement of lead anti-oxidation packaging accuracy and mass production yield. Firstly, traditional tin plating equipment often employs a vertical linear lifting and lowering method for entering and exiting the molten tin. When the lead is vertically immersed in the molten tin, air is easily trapped, forming bubbles and pinholes on the plating surface, resulting in a loose and non-dense tin layer and significantly reduced anti-oxidation protection. Simultaneously, the concentrated thermal shock during linear tin plating easily leads to uneven plating thickness, tin buildup, and incomplete plating, resulting in poor consistency in batch products. Furthermore, the existing equipment's slag removal and tin plating actions are independent and cannot be synchronized. Oxidized tin dross on the molten tin surface cannot be cleaned in real time, easily adhering to the lead surface, further aggravating plating defects and reducing packaging yield. Additionally, traditional equipment often uses multiple independent drive mechanisms to complete movement and lifting actions, resulting in complex equipment structures, low motion accuracy, high failure rates, and high production costs.
[0004] Secondly, after long-term scraping of tin surface dross by the scraper of traditional tin plating equipment, dross residue easily remains on the surface. Existing equipment lacks a dedicated and suitable automatic dross removal structure, relying mostly on manual cleaning periodically. This is not only labor-intensive and inefficient, but the residual dross can also secondary contaminate the tin bath and the leads to be processed, continuously affecting the stability of the tin plating process. Furthermore, conventional rigid dross removal structures are prone to hard collisions with the scraper, which can easily cause scraper deformation and structural damage over long-term operation. This results in short service life of equipment parts, high maintenance frequency and operating costs, and the lack of a dedicated collection structure for scattered dross, leading to poor cleanliness during operation.
[0005] Therefore, this invention proposes an anti-oxidation coating packaging device for the electrode pins of LED beads to solve the above problems. Summary of the Invention
[0006] To address the shortcomings of existing technologies, this invention provides an anti-oxidation coating packaging device for the electrode pins of LED beads, thereby solving the problems mentioned in the background art.
[0007] To achieve the above objectives, the present invention provides the following technical solution: an anti-oxidation coating encapsulation device for the electrode pins of LED lamp beads, comprising: a tin-immersion device and a first component mounted thereon, wherein a tin furnace assembly is provided on the tin-immersion device, and a conveying module mounted on the tin-immersion device is provided directly above the tin furnace assembly; the first component comprises: a guide plate fixedly connected to a fixed surface at the lower end of the conveying module, a guide ring groove being provided on the side of the guide plate away from the conveying module, a ring tooth being fixedly connected to the side of the guide plate away from the conveying module, and an inverted C-shaped moving part being slidably engaged on the outer ring of the guide plate;
[0008] The inverted C-shaped moving part has a vertical groove on the side away from the guide plate. Limiting grooves are formed in the inverted C-shaped moving parts on both sides of the vertical groove. A lifting part is slidably connected in the vertical groove. T-shaped strips are connected to the fixed plates on both sides of the lifting part. The T-shaped strips are slidably connected in the limiting grooves. A drive gear is rotatably connected to the side of the lifting part near the guide plate. A guide shaft is fixedly connected to the side of the drive gear away from the lifting part.
[0009] The T-shaped strip on one side of the lifting part extends to the outside of the inverted C-shaped moving part through the limiting groove. A connecting piece is fixedly connected to the extended end of the lifting part. A shaft is fixedly connected inside the connecting piece. A scraper is fixedly connected to the bottom of the shaft.
[0010] It also includes a second component for cleaning the scraper.
[0011] Preferably, the guide plate is rectangular with a rhomboid cross-section, the guide ring groove surrounds the outer ring of the annular gear, the inverted C-shaped moving part is mirrored C-shaped, and the inverted C-shaped moving part is engaged with one end of the guide plate with a triangular groove that engages with the rhomboid surfaces at both ends of the guide plate.
[0012] Preferably, the vertical groove is arranged perpendicular to the bottom surface, the two sets of limiting grooves are arranged perpendicular to the bottom surface and parallel to each other, the lifting part has a built-in drive motor, and the output shaft of the drive motor is fixedly connected to the drive gear, the guide shaft is arranged as a column rod and is slidably connected in the guide ring groove.
[0013] Preferably, the connector is located on the side of the inverted C-shaped moving part near the discharge end of the solder pot assembly, the shaft extends to the top of the solder pot assembly, and the scraper is inclined at the bottom towards the discharge end, with the scraper located directly above the solder pot assembly.
[0014] Preferably, the second component includes an extension fixedly connected to the right side of the guide plate, a fixing strip fixedly connected to the lower end of the extension, an inverted V-shaped scraper fixedly connected to the side of the fixing strip near the solder pot assembly, a metal support strip fixedly connected inside the inverted V-shaped scraper, and a collection tank fixedly connected to the bottom end of the inverted V-shaped scraper near the solder pot assembly.
[0015] It also includes a third component for installing and placing LED beads of different specifications.
[0016] Preferably, the extension body extends vertically downwards, the fixing strip is set perpendicular to the extension body, and the fixing strip is set on one side of the discharge end of the solder pot assembly. The inverted V-shaped scraper has an inverted V-shaped cross-section and is composed of a vertical plate perpendicular to the solder pot assembly and an inclined plate inclined towards the solder pot assembly. The inverted V-shaped scraper is made of a high-temperature resistant metal material that does not wet with solder. The metal support strip is in an inclined state, with one end fixedly connected to the vertical plate in the inverted V-shaped scraper and the other end abutting against the inclined plate in the inverted V-shaped scraper. The metal support strip is made of metal material with a certain degree of flexibility and resilience. The bottom height of the inclined plate in the inverted V-shaped scraper is higher than the bottom scraping surface height of the scraper.
[0017] Preferably, the third component includes an upper frame fixedly connected to the lifting part on the side away from the drive gear. The upper frame is located directly above the solder pot assembly. An inner frame is fixedly connected to the middle of the inner cavity of the upper frame. A drive component is fixedly installed in the inner frame. A bidirectional lead screw is sleeved at the other end of the synchronous belt in the drive component. The bidirectional lead screw is rotatably connected to the inner frame. Both ends of the bidirectional lead screw are driven by L-shaped connecting rods. A guide strip is fixedly connected to the middle of the bottom surface of the inner frame. A bearing part is fixedly connected to the outer side of one end of the L-shaped connecting rod outside the inner frame.
[0018] Preferably, the upper frame is a rectangular body with an opening at the bottom, the driving component consists of a driving motor and a timing belt, and the two sides of the bidirectional lead screw are arranged with opposite threads.
[0019] Preferably, the guide bar is arranged parallel to the bidirectional lead screw, the L-shaped connecting rod is arranged in a C-shape, one end is located inside the inner frame and is connected to the bidirectional lead screw for transmission, the other end is located outside the inner frame and the inner side is slidably connected to the guide bar, the bearing part is a C-shaped clamping plate formed by bending, the lower end extends to the center to form a lower clamping edge, the lower clamping edge is parallel to the bottom surface and forms a clamping groove.
[0020] Compared with the prior art, the present invention provides an anti-oxidation coating encapsulation device for the electrode pins of LED beads, which has the following advantages:
[0021] By driving the gears and ring gears to mesh and transmit power, and with the precise positioning of the guide shaft and guide ring groove, the traditional linear lifting and lowering tinning method of the LED lamp bead is changed. The LED lamp bead electrode pins gradually cut into and detach from the molten solder along an arc trajectory. The molten solder can slowly climb and wet the pin surface, effectively avoiding the problem of air encapsulation, greatly reducing plating bubbles and pinhole defects, making the tin plating layer on the pin surface more continuous and dense, and fundamentally improving the anti-oxidation performance and plating reliability of the electrode pins.
[0022] By utilizing the matching and snapping structure of the diamond-cut guide plate and the inverted C-shaped moving part triangular groove, the horizontal movement of the mechanism is ensured to be smooth and stable, realizing the synchronous linkage operation of slag scraping and tin immersion from the feeding end to the discharging end; the scraper cleans the oxidized tin dross on the surface of the tin liquid in real time, ensuring that the pins are always in clean tin liquid to complete the tin plating, effectively improving the uniformity and adhesion of the tin plating layer, eliminating plating defects caused by tin dross adhesion, and greatly improving the product packaging yield.
[0023] Relying on the high-temperature resistant, non-stick inverted V-shaped scraper, combined with the lifting action of the lifting unit, it can automatically and forcibly scrape off the solder dross adsorbed on the scraper surface without manual intervention, keeping the scraper working surface clean at all times, completely avoiding secondary contamination of the solder bath and the leads to be processed by residual solder on the scraper, and ensuring the process stability of continuous tin plating operations.
[0024] The inverted V-shaped scraper body is equipped with a metal support strip with elasticity and resilience, which can achieve flexible contact and scraping of slag. This ensures sufficient scraping force to remove slag and ensure thorough cleaning, while avoiding deformation and damage to the scraper and scraper body caused by rigid contact. This effectively extends the service life of equipment parts, reduces the frequency of equipment maintenance and operation and maintenance costs, and, together with the collection tank, enables automatic collection of slag, preventing slag from overflowing and falling back, and improving the cleanliness of equipment operation.
[0025] The device uses a two-way lead screw to drive two sets of L-shaped connecting rods and C-shaped bearing parts to open and close in a centered manner. It can adaptively accommodate LED beads of different specifications and sizes for clamping and positioning without the need to change tooling fixtures. The device has strong versatility, greatly expands the application range of the device, and effectively improves production adaptation efficiency.
[0026] The C-type card plate-type carrier supports the LED chip body, making the electrode pins completely exposed and unobstructed. This completely avoids structural interference during the tin-plating process, ensuring that there are no dead corners in the tin plating operation and that the LED chip body is not contaminated. At the same time, the centering clamping structure can accurately unify the tin-plating position and depth of all LED chip pins, eliminating problems such as tin buildup, missed plating, and uneven plating caused by skewed tin plating. This greatly improves the tin plating accuracy and consistency of batch products. Moreover, the automated clamping and positioning can be adapted to continuous production line operations, improving the overall level of packaging automation and production efficiency. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0028] Figure 2 This is a partial structural diagram of the present invention;
[0029] Figure 3 This is a partial front view of the structure of the present invention;
[0030] Figure 4 This is a partial structural diagram of the present invention from another perspective;
[0031] Figure 5 This is a disassembled structural diagram of the first and second components of the present invention;
[0032] Figure 6 This is a cross-sectional view of the first component of the present invention;
[0033] Figure 7 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;
[0034] Figure 8 This is a structural diagram of the third component of the present invention;
[0035] Figure 9 This is a cross-sectional view of the third component of the present invention.
[0036] In the picture:
[0037] 11. Tin dipping equipment; 12. Tin furnace assembly; 13. Conveying module;
[0038] 21. Guide plate; 22. Guide ring groove; 23. Ring gear; 24. Inverted C-shaped moving part; 25. Vertical groove; 26. Limiting groove; 27. Drive gear; 28. Guide shaft; 29. Lifting part; 210. Connecting part; 211. Shaft; 212. Scraper;
[0039] 31. Extension body; 32. Fixing strip; 33. Inverted V-shaped scraper; 34. Collection tank; 35. Metal support strip;
[0040] 41. Upper frame; 42. Inner frame; 43. Drive unit; 44. Two-way lead screw; 45. L-shaped connecting rod; 46. Guide bar; 47. Bearing unit. Detailed Implementation
[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0043] Example
[0044] Please refer to Figures 1 to 6 As shown:
[0045] To address the problems mentioned in the technical solutions, this invention provides an anti-oxidation coating encapsulation device for the electrode pins of LED beads, comprising: a tin-immersion device 11 and a first component mounted thereon; a tin furnace assembly 12 is provided on the tin-immersion device 11, and a conveying module 13 mounted on the tin furnace assembly 12 is provided directly above the tin furnace assembly 12; the first component includes: a guide plate 21 fixedly connected to a fixed surface at the lower end of the conveying module 13; the guide plate 21 is rectangular and its cross-section is diamond-shaped; the guide plate 21 is located away from the conveying module 13. One side of the guide plate 21 is provided with a guide ring groove 22. The side of the guide plate 21 away from the conveying module 13 is fixedly connected with an annular toothed member 23. The guide ring groove 22 is arranged around the outer ring of the annular toothed member 23. The outer ring of the guide plate 21 is slidably engaged with an inverted C-shaped moving member 24. The inverted C-shaped moving member 24 is arranged in a mirror C shape. One end of the inverted C-shaped moving member 24 is engaged with a triangular groove that is engaged with the diamond-shaped surfaces at both ends of the guide plate 21. The inverted C-shaped moving member 24 is used to move back and forth on the guide plate 21, providing horizontal movement drive for tin plating and tin dross removal operations.
[0046] A vertical groove 25 is provided on the side of the inverted C-shaped moving part 24 away from the guide plate 21. The vertical groove 25 is perpendicular to the bottom surface. Limiting grooves 26 are provided in the inverted C-shaped moving parts 24 on both sides of the vertical groove 25. The vertical groove 25 and the limiting grooves 26 cooperate to assist the vertical up and down movement of the lifting part 29 and the connecting part 210. The two sets of limiting grooves 26 are perpendicular to the bottom surface and are arranged parallel to each other. The lifting part 29 is slidably connected in the vertical groove 25. T-shaped strips are connected to the fixing plates on both sides of the lifting part 29. The T-shaped strips are slidably connected in the limiting grooves 26. The side of the lifting part 29 near the guide plate 21 is rotatably connected to the drive gear 27. The lifting part 29 has a built-in drive motor. Furthermore, the output shaft of the drive motor is fixedly connected to the drive gear 27. The drive motor built into the lifting part 29 is used to drive the drive gear 27 to rotate in the opposite direction. The drive gear 27 rotates around the ring gear 23 in the opposite direction, and moves up and down in the inverted C-shaped moving part 24 in coordination with the lifting part 29. When the lifting part 29 is below the vertical groove 25, it works with the LED lamp bead motor pins placed on the third component to perform tin plating operation from the feeding end to the discharging end. The side of the drive gear 27 away from the lifting part 29 is fixedly connected to the guide shaft 28. The guide shaft 28 is set as a column and is slidably connected in the guide ring groove 22 to provide limit guidance for the movement of the drive gear 27.
[0047] A T-shaped strip on one side of the lifting part 29 extends through the limiting groove 26 to the outside of the inverted C-shaped moving part 24. A connecting part 210 is fixedly connected to the extended end of the lifting part 29. The connecting part 210 is used to coordinate the vertical lifting and lowering movement of the lifting part 29. The connecting part 210 is located on the side of the inverted C-shaped moving part 24 near the discharge end of the tin furnace assembly 12. A shaft 211 is fixedly connected inside the connecting part 210. The shaft 211 extends to the top of the tin furnace assembly 12. A scraper 212 is fixedly connected to the bottom of the shaft 211. The scraper 212 is set in an inclined position with its lower end towards the discharge end. The scraper 212 is located directly above the tin furnace assembly 12. The scraper 212 is used to follow the left and right reciprocating movement of the inverted C-shaped moving part 24. When the lifting part 29 is placed at the lower end of the inverted C-shaped moving part 24, it contacts the tin surface on the tin furnace assembly 12. The tin dross is first scraped off from the feeding end to the discharge end, and then the workpiece is immersed in tin to ensure the cleanliness of the tin immersion of the motor pins.
[0048] It also includes a second component for cleaning scraper 212.
[0049] A further embodiment: Please refer to Figures 3 to 9 As shown:
[0050] The second component includes an extension 31 fixedly connected to the right side of the guide plate 21. The extension 31 extends vertically downward, and a fixing strip 32 is fixedly connected to the lower end of the extension 31. The fixing strip 32 is perpendicular to the extension 31 and is located on the discharge end side of the solder pot assembly 12. The fixing strip 32 provides rigid support for the inverted V-shaped scraper 33. The side of the fixing strip 32 closest to the solder pot assembly 12 is fixedly connected to the inverted V-shaped scraper 33. The inverted V-shaped scraper 33 has an inverted V-shaped cross-section and consists of a vertical plate perpendicular to the solder pot assembly 12 and an inclined plate inclined towards the solder pot assembly 12. The inverted V-shaped scraper 33 is made of a high-temperature resistant metal that does not wet with solder. The inverted V-shaped scraper 33 is used to fit against the scraper 212 when it moves to the position of the inverted V-shaped scraper 33. The bottom surface of the inverted V-shaped scraper 33 is higher than the height of the scraper 212. The scraper 212 is provided, and the lower end of the scraper 212 carrying the tin dross is in contact with the inverted V-shaped scraper 33. During the lifting process of the lifting part 29, the scraper 212 rises together and comes into contact with the inverted V-shaped scraper 33 to scrape off the tin dross adsorbed on the scraper 212. Under the action of gravity, the dross falls into the collection tank 34 for collection. A metal support strip 35 is fixedly connected inside the inverted V-shaped scraper 33. The collection tank 34 is fixedly connected to the side of the bottom of the inverted V-shaped scraper 33 near the tin furnace assembly 12. The metal support strip 35 is in an inclined state. One end of it is fixedly connected to the vertical plate in the inverted V-shaped scraper 33, and the other end is in contact with the inclined plate in the inverted V-shaped scraper 33. The metal support strip 35 is made of metal and has a certain degree of flexibility and resilience. The bottom height of the inclined plate in the inverted V-shaped scraper 33 is higher than the bottom scraping surface height of the scraper 212.
[0051] It also includes a third component for installing and placing LED beads of different specifications.
[0052] The third component includes an upper frame 41 fixedly connected to the lifting part 29 on the side away from the drive gear 27. The upper frame 41 is located directly above the solder pot assembly 12. The upper frame 41 is a rectangular body with an opening at the bottom. An inner frame 42 is fixedly connected to the middle of the inner cavity of the upper frame 41. A drive component 43 is fixedly installed inside the inner frame 42. The drive component 43 is used to drive the bidirectional lead screw 44 to rotate synchronously. The drive component 43 consists of a drive motor and a timing belt. The other end of the timing belt in the drive component 43 is sleeved with the bidirectional lead screw 44. The bidirectional lead screw 44 is rotatably connected to the inner frame. Inside the body 42, the two sides of the bidirectional lead screw 44 are threaded with opposite directions. Both ends of the bidirectional lead screw 44 are connected to L-shaped connecting rods 45 for driving and moving in the center following the forward rotation of the bidirectional lead screw 44. A guide bar 46 is fixedly connected to the middle of the bottom surface of the inner frame 42. The guide bar 46 and the L-shaped connecting rod 45 cooperate to form a guide line limit. The guide bar 46 is arranged parallel to the bidirectional lead screw 44. The L-shaped connecting rod 45 is C-shaped, with one end located inside the inner frame 42 and drivingly connected to the bidirectional lead screw 44, and the other end located outside the inner frame 42. The inner side is slidably connected to the guide strip 46. An L-shaped connecting rod 45 is fixedly connected to a bearing part 47 on one end of the outer side of the inner frame 42. The bearing part 47 is a bent C-shaped clamping plate, with its lower end extending to form a lower clamping edge. The lower clamping edge is parallel to the bottom surface, forming a snap-fit groove. The bearing part 47 moves in the center, and under the action of its snap-fit groove, the LED beads to be tinned are installed into the snap-fit groove of the bearing part 47, allowing for suspended mounting and positioning with LED beads of different specifications. The upper part of the LED bead is mounted in the snap-fit groove, and its bottom... The LED lamp bead motor pins are placed outside the lower end of the bearing part 47. When the lifting part 29 moves to the bottom of the inverted C-shaped moving part 24, the LED lamp bead motor pins come into contact with the molten tin in the tin furnace assembly 12 to perform a tin plating operation from left to right. After the tin plating is completed, the inverted C-shaped moving part 24 moves to the rightmost end of the guide plate 21. Under the meshing transmission of the drive gear 27 and the ring gear 23, the drive gear 27 moves upward in the opposite direction around the ring gear 23. The third component moves up with the lifting part 29. Under the action of the externally installed cooling and drying mechanism, the tin layer is quickly cooled and then transferred to the next step.
[0053] Among them, the metal support bar 35 is made of spring steel and manufactured by tempering heat treatment process. It achieves flexible contact and scraping of slag by relying on elastic deformation. Under normal conditions, it continuously applies top support elastic force to the inclined plate, so that the inverted V-shaped scraper body 33 inclined plate maintains the outward pre-opening angle.
[0054] Specifically, the V-shaped scraper 33 is made of stainless steel and can withstand a long-term continuous working temperature of less than or equal to 850℃; its instantaneous high-temperature impact resistance is up to 1000℃, which is far higher than the conventional molten tin working temperature of tin furnace: 260-320℃, with a maximum of 450℃.
[0055] Furthermore, the inner and outer surfaces of the V-shaped scraper 33 are plasma-sprayed with a high-temperature resistant and non-stick boron nitride coating, and the coating thickness is controlled at 0.1mm. Boron nitride has a graphite-like layered structure with extremely low surface free energy. Molten tin is a liquid metal with high surface tension. According to the principle of wetting determination, a liquid contact angle greater than 90° is considered non-wetting. The contact angle of molten tin on the surface of the boron nitride coating can reach more than 25°. The molten tin and tin dross cannot spread and be adsorbed, and automatically slide off under gravity.
[0056] The working principle of all the content in the above embodiments is as follows:
[0057] When in use, the LED beads to be processed are placed in the third component, the drive unit 43 is started, and the bidirectional lead screw 44 is rotated; because the two sides of the bidirectional lead screw 44 have opposite threads, the two sets of L-shaped connecting rods 45 move towards each other along the guide bar 46, thereby driving the two side bearing parts 47 to move closer together synchronously.
[0058] The carrier part 47 is a C-shaped card plate formed by bending. The lower end of the card slot holds and positions the LED lamp bead in the air. The main body of the lamp bead is supported by the card slot, and the bottom electrode pin is exposed below the carrier part 47, realizing the universal centering positioning of lamp beads of different specifications and ensuring the consistency of the subsequent tinning position.
[0059] After clamping, the drive gear 27 and the ring gear 23 are in the initial meshing state. The inverted C-shaped moving part 24 is placed on the far left of the guide plate 21, located at the feeding end of the tin furnace assembly 12. The lifting part 29 is placed at the bottom of the inverted C-shaped moving part 24. The guide shaft 28 at the rear end of the drive gear 27 extends into the guide ring groove 22 to provide circumferential guidance for subsequent movement. When the motor inside the lifting part 29 is driven, the drive gear 27 rotates in the opposite direction and meshes with the ring gear 23 to drive the inverted C-shaped moving part 24 to move horizontally from left to right on the guide plate 21. The guide plate 21 is a rectangular plate with a rhomboid cross section, which is adapted to and engaged with the triangular groove at the end of the inverted C-shaped moving part 24 to ensure smooth and stable movement.
[0060] During the movement, the connector 210 and shaft 211 fixed to one side of the lifting part 29 move to the right in sync, so that the scraper 212 always sticks to the surface of the molten tin in the tin furnace assembly 12. First, the tin oxide dross on the surface of the molten tin is scraped off from the left feed end to the right discharge end to clean the tin surface and ensure that the pins are clean when immersed in tin.
[0061] At the same time, the LED electrode pins on the feed side are immersed in clean molten tin to complete the tin plating process, forming a uniform tin plating layer on the pin surface to achieve anti-oxidation substrate protection.
[0062] Because the annular toothed component 23 is annularly arranged, when the LED lamp bead assembly is immersed in the tin furnace assembly 12, the bottom pin of the LED lamp bead moves in an arc-shaped trend and gradually enters the tin furnace assembly 12. It does not move in a straight line up, down, left, right and up. This arc cuts into the molten tin, and the molten tin slowly climbs and gradually wets the pin surface. It is not easy to trap air, which can significantly reduce bubble pinhole defects and make the anti-oxidation tin plating layer more continuous and dense.
[0063] When the inverted C-shaped moving part 24 moves to the rightmost discharge side of the guide plate 21, the built-in drive motor of the lifting part 29 continues to rotate, driving the drive gear 27 to rotate. The drive gear 27 moves in the opposite circumferential direction along the ring gear 23. With the sliding limit of the guide shaft 28 in the guide ring groove 22, the lifting part 29 is smoothly lifted upward after moving horizontally into position, causing the LED lamp bead electrode pin to detach from the molten solder in the solder pot assembly 12. At the same time, as the lifting part 29 drives the scraper 212 to rise, the scraper 212 moves to the position of the inverted V-shaped scraper 33 of the second component and comes into contact with it. The inverted V-shaped scraper 33 is made of a high-temperature resistant metal material that does not wet with solder. Its inclined plate abuts against the surface of the rising scraper 212, forcibly scraping off the solder dross adsorbed on the scraper 212.
[0064] The scraped tin dross falls into the collection tank 34 below under the action of gravity and is collected. The metal support strip 35 inside the inverted V-shaped scraper 33 has elasticity and recovery force. When the scraper 212 is lifted by the lifting part 29 and squeezes the inclined plate upward, the inclined plate retracts inward and compresses the metal support strip 35. The support strip generates uniform elastic buffer, and the inclined plate is completely attached to the surface of 212. Relying on the pre-tightening elastic force to provide stable dross scraping pressure, the tin dross adsorbed on the scraper surface is completely scraped off into the collection tank 34. After the scraper descends and detaches, the metal support strip 35 elastically recovers and pushes the inclined plate to automatically return to the pre-opening angle. This ensures the dross scraping contact force and avoids rigid collision damage to the scraper. At the same time, it allows the inclined plate to adaptively fit the scraper surface.
[0065] After the LED beads are fully lifted by the lifting unit 29, the tin plating layer on the surface of the electrode pins is rapidly cooled and solidified under the action of the external cooling and drying mechanism, forming a dense and stable anti-oxidation plating layer. Then the device is reset, the carrier 47 is released, the LED beads that have completed the tin plating and anti-oxidation encapsulation are removed and transferred to the next process, and the device enters the next working cycle.
[0066] Please refer to the above work process. Figures 1 to 9 .
[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead, comprising: A tin-immersion apparatus (11) and a first component mounted thereon, wherein a tin furnace assembly (12) is provided on the tin-immersion apparatus (11), and a conveying module (13) mounted on the tin-immersion apparatus (11) is provided directly above the tin furnace assembly (12). The first component comprises: a guide plate (21) fixedly connected to a fixed surface at the lower end of the conveying module (13), wherein a guide ring groove (22) is provided on the side of the guide plate (21) away from the conveying module (13), and an annular toothed member (23) is fixedly connected to the side of the guide plate (21) away from the conveying module (13), and an inverted C-shaped moving member (24) is slidably engaged on the outer ring of the guide plate (21). The inverted C-shaped moving part (24) has a vertical groove (25) on the side away from the guide plate (21). Limiting grooves (26) are provided in the inverted C-shaped moving parts (24) on both sides of the vertical groove (25). A lifting part (29) is slidably connected in the vertical groove (25). T-shaped strips are connected to the fixing plates on both sides of the lifting part (29). The T-shaped strips are slidably connected in the limiting grooves (26). A drive gear (27) is rotatably connected to the side of the lifting part (29) close to the guide plate (21). A guide shaft (28) is fixedly connected to the side of the drive gear (27) away from the lifting part (29). The T-shaped strip on one side of the lifting part (29) extends to the outside of the inverted C-shaped moving part (24) through the limiting groove (26). A connecting piece (210) is fixedly connected to the extended end of the lifting part (29). A shaft (211) is fixedly connected inside the connecting piece (210). A scraper (212) is fixedly connected to the bottom of the shaft (211). It also includes a second component for cleaning the scraper (212).
2. The anti-oxidation coating encapsulation device for LED lamp bead electrode pins according to claim 1, characterized in that: The guide plate (21) is a rectangular plate with a rhomboid cross-section. The guide ring groove (22) is arranged around the outer ring of the annular toothed member (23). The inverted C-shaped moving member (24) is a mirror C-shaped member. The inverted C-shaped moving member (24) is engaged with the guide plate (21) at one end, and a triangular groove is provided to engage with the rhomboid surfaces at both ends of the guide plate (21).
3. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 1, characterized in that: The vertical groove (25) is set perpendicular to the bottom surface, the two sets of limiting grooves (26) are set perpendicular to the bottom surface and parallel to each other, the lifting part (29) has a built-in drive motor, and the output shaft of the drive motor is fixedly connected to the drive gear (27), the guide shaft (28) is set as a column rod and is slidably connected in the guide ring groove (22).
4. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 1, characterized in that: The connector (210) is located on the side of the inverted C-shaped moving part (24) near the discharge end of the tin furnace assembly (12). The shaft (211) extends to the top of the tin furnace assembly (12). The scraper (212) is arranged with its lower end inclined towards the discharge end. The scraper (212) is located directly above the tin furnace assembly (12).
5. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 1, characterized in that: The second component includes an extension (31) fixedly connected to the right side of the guide plate (21). A fixing strip (32) is fixedly connected to the lower end of the extension (31). An inverted V-shaped scraper (33) is fixedly connected to the side of the fixing strip (32) near the solder pot assembly (12). A metal support strip (35) is fixedly connected inside the inverted V-shaped scraper (33). A collection tank (34) is fixedly connected to the bottom end of the inverted V-shaped scraper (33) near the solder pot assembly (12). It also includes a third component for installing and placing LED beads of different specifications.
6. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 5, characterized in that: The extension body (31) extends vertically downwards, and the fixing strip (32) is set perpendicular to the extension body (31). The fixing strip (32) is set on one side of the discharge end of the tin furnace assembly (12). The inverted V-shaped scraper (33) has an inverted V-shaped cross-section. It is composed of a vertical plate perpendicular to the tin furnace assembly (12) and an inclined plate inclined towards the tin furnace assembly (12). The inverted V-shaped scraper (33) is made of a high-temperature resistant metal material that does not wet with tin. The metal support strip (35) is in an inclined state. One end of it is fixedly connected to the vertical plate in the inverted V-shaped scraper (33), and the other end is in contact with the inclined plate in the inverted V-shaped scraper (33). The metal support strip (35) is made of metal material with a certain degree of flexibility and resilience. The bottom height of the inclined plate in the inverted V-shaped scraper (33) is higher than the bottom scraping surface height of the scraper (212).
7. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 5, characterized in that: The third component includes an upper frame (41) fixedly connected to the lifting part (29) on the side away from the drive gear (27). The upper frame (41) is located directly above the tin furnace assembly (12). An inner frame (42) is fixedly connected to the middle of the inner cavity of the upper frame (41). A drive component (43) is fixedly installed inside the inner frame (42). A bidirectional lead screw (44) is sleeved on the other end of the synchronous belt in the drive component (43). The bidirectional lead screw (44) is rotatably connected inside the inner frame (42). Both ends of the bidirectional lead screw (44) are connected to L-shaped connecting rods (45). A guide strip (46) is fixedly connected to the middle of the bottom surface of the inner frame (42). A bearing part (47) is fixedly connected to the outer side of one end of the L-shaped connecting rod (45) outside the inner frame (42).
8. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 7, characterized in that: The upper frame (41) is a rectangular body with an opening at the bottom. The drive unit (43) consists of a drive motor and a timing belt. The two-way lead screw (44) has opposing threads on both sides.
9. The anti-oxidation coating encapsulation device for the electrode pins of an LED lamp bead according to claim 7, characterized in that: The guide bar (46) is arranged parallel to the bidirectional lead screw (44). The L-shaped connecting rod (45) is arranged in a C-shape. One end is located inside the inner frame (42) and is connected to the bidirectional lead screw (44) for transmission. The other end is located outside the inner frame (42) and its inner side is slidably connected to the guide bar (46). The bearing part (47) is a C-shaped clamping plate formed by bending. The lower end extends in the center to form a lower clamping edge. The lower clamping edge is parallel to the bottom surface and forms a clamping groove.