A raw material processing structure for lead-free solder bar production

Abstract

The utility model discloses a raw material processing structure for lead -free soldering tin bar production belongs to lead -free soldering tin bar production technical field, and its technical scheme main points include mixing jar, the inside of mixing jar is provided with stirring subassembly, the bottom of mixing jar is provided with melting jar, the inside of melting jar is provided with processing subassembly, stirring subassembly includes the drive motor of fixed connection in the top of mixing jar, can solve the raw material processing structure for lead -free soldering tin bar production of current generally adopts single -shaft stirring etc. Simple rotation movement mixes raw material, and it is inconvenient to fully mix the raw material of different density with big granularity difference, thereby leads to raw material mixing uneven, influences soldering tin bar's component consistency and welding performance, and moreover the raw material processing structure for current production is inconvenient to the stable stirring and continuous conveying of liquid metal, thereby easily appearing alloy segregation phenomenon, influences soldering tin bar's strength and reliability problem.

Description

Technical Field

[0001] This utility model relates to the field of lead-free solder bar production technology, and in particular to a raw material processing structure for lead-free solder bar production. Background Technology

[0002] Lead-free solder bars are commonly used welding materials in the electronics industry. Compared with traditional leaded solder bars, they have lower toxicity and better environmental performance, meeting the requirements of modern society for environmental protection and human health. Therefore, they have been widely used in the field of electronics manufacturing. Lead-free solder bars are usually composed of elements such as tin, silver, and copper, and have a high melting point and good wettability, which can ensure the quality and reliability of welding.

[0003] To address the aforementioned issues, existing patents have provided solutions. However, the existing raw material processing structures for lead-free solder bar production typically employ simple rotary motions such as single-axis stirring to mix the raw materials. This is not conducive to fully mixing raw materials with large differences in particle size and density, resulting in uneven mixing of the raw materials. This affects the consistency of the solder bar's composition and its welding performance. Furthermore, the existing raw material processing structures are not conducive to the stable stirring and continuous conveying of liquid metal, which can easily lead to alloy segregation, affecting the strength and reliability of the solder bar.

[0004] Therefore, a raw material processing structure for the production of lead-free solder bars is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a raw material processing structure for the production of lead-free solder bars. This structure solves the problems of existing raw material processing structures for lead-free solder bar production, which typically use simple rotational motions such as single-axis stirring to mix raw materials. This is not conducive to fully mixing raw materials with large differences in particle size and density, resulting in uneven mixing of raw materials, which affects the consistency of solder bar composition and welding performance. Furthermore, existing raw material processing structures are not conducive to the stable stirring and continuous conveying of liquid metal, which easily leads to alloy segregation, affecting the strength and reliability of solder bars.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a raw material processing structure for the production of lead-free solder bars, including a mixing tank, a stirring assembly inside the mixing tank, a melting tank at the bottom of the mixing tank, and a processing assembly inside the melting tank;

[0007] The stirring assembly includes a drive motor fixedly connected to the top of the mixing tank. The output end of the drive motor is fixedly connected to a rotating shaft. A guide rail is fixedly connected to the outer side of the rotating shaft. Planetary stirring arms are arranged on both sides inside the guide rail. Stirring blades are fixedly connected to the outer side of the planetary stirring arms. A baffle is fixedly connected to the bottom of the planetary stirring arms. A connecting seat is fixedly connected to the outer side of the planetary stirring arms. A scraper is slidably connected inside the connecting seat.

[0008] Preferably, the processing assembly includes a controller fixedly connected to the outside of the melting tank, a heating wire electrically connected to the outside of the controller, and a heat-conducting plate fixedly connected inside the melting tank, the heat-conducting plate being located inside the heating wire.

[0009] Preferably, the melting tank is fixedly connected to a conveying channel, which is located inside the heat-conducting plate.

[0010] Preferably, a servo motor is fixedly connected to the top of the melting tank, and a spiral stirring blade is fixedly connected to the output end of the servo motor. The spiral stirring blade is located inside the conveying channel, and a control valve is provided at the bottom of the conveying channel.

[0011] Preferably, the bottom of the mixing tank is connected to a connecting channel, the bottom of the connecting channel is connected to a discharge pipe, and the bottom of the discharge pipe is connected to a conveying channel.

[0012] Preferably, a temperature sensor is provided on the outside of the melting tank, and the temperature sensor is electrically connected to the controller.

[0013] Preferably, a connecting spring is fixedly connected inside the connecting seat, and the connecting spring is fixedly connected to the inner side of the scraper.

[0014] Preferably, the top of the mixing tank is connected to a feed pipe, and a blocking block is engaged at the top of the feed pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application achieves the effect of fully stirring raw material powders such as tin, silver, and copper through the stirring component, which improves the uniformity and efficiency of raw material mixing. It solves the problem of uneven mixing caused by large differences in particle size and density of raw materials due to two-dimensional planar stirring in traditional stirring equipment. Compared with traditional stirring devices, this stirring component can scrape the raw materials adhering to the tank wall to avoid raw material residue and ensure uniform mixing. It achieves the functions of efficient and uniform mixing of raw materials and prevention of raw material residue.

[0017] 2. This application achieves uniform heating and melting of raw materials through processing components, improving the uniformity of heating and melting efficiency of liquid metal. It solves the problem of insufficient stirring and improper temperature control leading to alloy segregation in traditional furnaces due to unreasonable stirring device design. Moreover, compared with traditional melting devices, it can accurately control the temperature and stably stir and transport the raw materials during the melting process, ensuring the quality of liquid metal, effectively preventing alloy composition segregation, improving the physical properties of solder bars, and realizing the functions of precise temperature control, uniform melting, and stable transport of liquid metal. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the raw material processing structure for the production of lead-free solder bars according to this utility model.

[0019] Figure 2 This is a cross-sectional view of the mixing tank and melting tank of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the stirring assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the processing component of this utility model;

[0022] Figure 5 This is a schematic diagram of the planetary stirring arm of this utility model;

[0023] Figure 6 This is a schematic diagram of the conveying channel of this utility model.

[0024] In the diagram, 1. Mixing tank; 2. Melting tank; 3. Connecting channel; 4. Stirring assembly; 401. Drive motor; 402. Rotating shaft; 403. Guide rail; 404. Planetary stirring arm; 405. Stirring blade; 406. Baffle plate; 407. Connecting seat; 408. Scraper; 5. Processing assembly; 501. Controller; 502. Heating wire; 503. Heat conducting plate; 504. Conveying channel; 505. Servo motor; 506. Spiral stirring blade; 507. Control valve; 6. Discharge pipe; 7. Temperature sensor; 8. Connecting spring; 9. Feed pipe; 10. Blocking block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 The present invention provides the following technical solution:

[0027] A raw material processing structure for the production of lead-free solder bars includes a mixing tank 1, a stirring assembly 4 inside the mixing tank 1, a melting tank 2 at the bottom of the mixing tank 1, and a processing assembly 5 inside the melting tank 2.

[0028] The stirring assembly 4 includes a drive motor 401 fixedly connected to the top of the mixing tank 1. The output end of the drive motor 401 is fixedly connected to a rotating shaft 402. A guide rail 403 is fixedly connected to the outside of the rotating shaft 402. Planetary stirring arms 404 are provided on both sides inside the guide rail 403. Stirring blades 405 are fixedly connected to the outside of the planetary stirring arms 404. A baffle 406 is fixedly connected to the bottom of the planetary stirring arms 404. A connecting seat 407 is fixedly connected to the outside of the planetary stirring arms 404. A scraper 408 is slidably connected inside the connecting seat 407.

[0029] In this embodiment: by starting the drive motor 401 at the top of the mixing tank 1, the drive motor 401 drives the rotating shaft 402 to rotate, and the guide rail 403 on the outside of the rotating shaft 402 rotates accordingly. Under the action of the guide rail 403, the planetary stirring arms 404 on both sides inside the guide rail 403 revolve around the rotating shaft 402 and rotate around their own axis. This planetary motion causes the stirring blades 405 fixed on the outside of the planetary stirring arms 404 to form a complex three-dimensional stirring trajectory in the mixing tank 1, which fully stirs the raw material powder. At the same time, the baffle 406 at the bottom of the planetary stirring arms 404 further disturbs the material flow and enhances the mixing effect. Meanwhile, the scraper 408 in the connecting seat 407 on the outside of the planetary stirring arms 404 slides close to the inner wall of the mixing tank 1 under the action of the connecting spring 8, scraping off the raw material attached to the tank wall to avoid raw material residue and ensure uniform mixing.

[0030] Specifically, such as Figure 4 As shown, the processing component 5 includes a controller 501 fixedly connected to the outside of the melting tank 2. A heating wire 502 is electrically connected to the outside of the controller 501. A heat-conducting plate 503 is fixedly connected inside the melting tank 2. The heat-conducting plate 503 is located inside the heating wire 502.

[0031] Specifically, such as Figure 4 As shown, a conveying channel 504 is fixedly connected inside the melting tank 2, and the conveying channel 504 is located inside the heat-conducting plate 503.

[0032] Specifically, such as Figure 4 As shown, a servo motor 505 is fixedly connected to the top of the melting tank 2, and a spiral stirring blade 506 is fixedly connected to the output end of the servo motor 505. The spiral stirring blade 506 is located inside the conveying channel 504, and a control valve 507 is provided at the bottom of the conveying channel 504.

[0033] In this embodiment: the temperature inside the melting tank 2 is monitored in real time by the temperature sensor 7 on the outside of the melting tank 2, and the data is transmitted to the controller 501. The controller 501 controls the heating wire 502 to work according to the set temperature parameters. The heat generated by the heating wire 502 is evenly transferred to the melting tank 2 through the heat conduction plate 503 to heat and melt the raw materials in the conveying channel 504. At the same time, the servo motor 505 at the top of the melting tank 2 is started, which drives the spiral stirring blade 506 in the conveying channel 504 to rotate. The spiral stirring blade 506 pushes the molten liquid metal forward on the one hand, and stirs the liquid metal on the other hand to make it heat evenly and avoid the phenomenon of alloy composition segregation.

[0034] Specifically, such as Figure 6 As shown, the bottom of the mixing tank 1 is connected to a connecting channel 3, the bottom of the connecting channel 3 is connected to a discharge pipe 6, and the bottom of the discharge pipe 6 is connected to the conveying channel 504.

[0035] Specifically, such as Figure 1 As shown, a temperature sensor 7 is installed on the outside of the melting tank 2, and the temperature sensor 7 is electrically connected to the controller 501.

[0036] In this embodiment: By setting up a connecting channel 3 and a discharge pipe 6, after the tin, silver, and copper powders in the mixing tank 1 are fully mixed by the planetary stirring arm 404, the uniformly mixed raw materials slide down through the connecting channel 3 at the bottom of the mixing tank 1 and enter the discharge pipe 6 at the bottom of the connecting channel 3. The discharge pipe 6 then accurately conveys the raw materials to the inlet of the conveying channel 504 inside the melting tank 2. During the entire transmission process, the connecting channel 3 and the discharge pipe 6 form a closed material transmission path. The raw materials fall naturally by gravity without the need for additional power. By setting up a temperature sensor 7, the temperature sensor 7 on the outside of the melting tank 2 continuously monitors the temperature inside the tank. When the raw materials in the conveying channel 504 begin to melt, the temperature sensor 7 converts the real-time temperature data into an electrical signal and transmits it to the controller 501 on the outside of the melting tank 2. The controller 501 has a built-in preset temperature threshold. If the monitored temperature is lower than the preset value, the controller 501 immediately sends an electrical signal to the heating wire 502 to start the heating wire 502. When the temperature reaches the preset range, the controller 501 automatically adjusts the power of the heating wire 502 or stops heating to maintain a stable melting temperature.

[0037] Specifically, such as Figure 5 As shown, a connecting spring 8 is fixedly connected inside the connecting seat 407, and the connecting spring 8 is fixedly connected to the inner side of the scraper 408.

[0038] Specifically, such as Figure 1 As shown, the top of the mixing tank 1 is connected to a feed pipe 9, and a blockage block 10 is snapped into the top of the feed pipe 9.

[0039] In this embodiment: By setting a connecting spring 8, when the planetary stirring arm 404 revolves and rotates around the axis 402, the connecting seat 407 on the outside of the stirring arm drives the scraper 408 to move synchronously. The connecting spring 8 inside the connecting seat 407 is always in a compressed state, and the scraper 408 is pressed tightly against the inner wall of the mixing tank 1 by the elastic force. When the scraper 408 moves with the stirring arm, if it comes into contact with the raw material powder attached to the tank wall, the spring will automatically extend and retract according to the curvature of the tank wall, so that the scraper 408 always slides against the tank wall, scraping the residual raw material to the bottom of the mixing tank 1. By setting up a feed pipe 9 and a blocking block 10, when adding raw materials, the blocking block 10 at the top of the feed pipe 9 is pulled out upwards. The blocking block 10 is made of rubber and is press-fitted with the inner wall of the feed pipe 9. Tin, silver and copper powders are poured into the mixing tank 1 through the feed pipe 9. After the feeding is completed, the blocking block 10 is re-inserted into the top of the feed pipe 9. The flange of the blocking block 10 fits tightly with the port of the feed pipe 9 to form a sealing structure, preventing dust from escaping and polluting the workshop environment during the feeding process, and preventing external dust, moisture and other impurities from entering the mixing tank 1 and affecting the purity of the raw materials.

[0040] Working principle: When using the raw material processing structure for lead-free solder bar production, first open the plug 10 of the feed pipe 9 at the top of the mixing tank 1, and pour the raw material powders such as tin, silver, and copper into the mixing tank 1 through the feed pipe 9. Then plug the plug 10 to prevent dust leakage. Start the drive motor 401 at the top of the mixing tank 1. The drive motor 401 drives the rotating shaft 402 to rotate, and the guide rail 403 on the outside of the rotating shaft 402 rotates accordingly. The planetary stirring arms 404 on both sides inside the guide rail 403 rotate around the guide rail 403 under the action of the guide rail 403. The rotating shaft 402 revolves around a central axis and rotates on its own axis. This planetary motion causes the stirring blades 405, fixed to the outside of the planetary stirring arm 404, to form a complex three-dimensional stirring trajectory within the mixing tank 1, thoroughly mixing the raw material powder. Simultaneously, the baffle 406 at the bottom of the planetary stirring arm 404 further disrupts the material flow, enhancing the mixing effect. Meanwhile, the scraper 408 within the connecting seat 407 on the outside of the planetary stirring arm 404 slides tightly against the inner wall of the mixing tank 1 under the action of the connecting spring 8, scraping away the raw material adhering to the tank wall. To avoid raw material residue and ensure uniform mixing, the uniformly mixed raw material enters the discharge pipe 6 through the connecting channel 3 at the bottom of the mixing tank 1, and is then transported by the discharge pipe 6 to the conveying channel 504 inside the melting tank 2. At this time, the temperature sensor 7 on the outside of the melting tank 2 monitors the temperature inside the melting tank 2 in real time and transmits the data to the controller 501. The controller 501 controls the heating wire 502 to work according to the set temperature parameters. The heat generated by the heating wire 502 is evenly transferred to the melting tank 2 through the heat conduction plate 503 to heat and melt the raw material in the conveying channel 504. At the same time, the servo motor 505 at the top of the melting tank 2 starts, driving the spiral stirring blade 506 in the conveying channel 504 to rotate. The spiral stirring blade 506 pushes the molten liquid metal forward on the one hand, and stirs the liquid metal on the other hand to make it heat evenly and avoid the phenomenon of alloy composition segregation. When the liquid metal is transported to the bottom of the conveying channel 504, the control valve 507 is opened, and the liquid metal flows out of the conveying channel 504 and enters the subsequent cooling and forming processes, finally producing lead-free solder bars.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A raw material processing structure for lead-free solder bar production, comprising a mixing tank (1), characterized in that: The mixing tank (1) is equipped with a stirring assembly (4), and a melting tank (2) is provided at the bottom of the mixing tank (1). The melting tank (2) is equipped with a processing assembly (5). The stirring assembly (4) includes a drive motor (401) fixedly connected to the top of the mixing tank (1). The output end of the drive motor (401) is fixedly connected to a rotating shaft (402). A guide rail (403) is fixedly connected to the outside of the rotating shaft (402). Planetary stirring arms (404) are provided on both sides inside the guide rail (403). A stirring blade (405) is fixedly connected to the outside of the planetary stirring arm (404). A baffle (406) is fixedly connected to the bottom of the planetary stirring arm (404). A connecting seat (407) is fixedly connected to the outside of the planetary stirring arm (404). A scraper (408) is slidably connected inside the connecting seat (407).

2. The raw material processing structure for lead-free solder bar production according to claim 1, characterized in that: The processing component (5) includes a controller (501) fixedly connected to the outside of the melting tank (2), a heating wire (502) electrically connected to the outside of the controller (501), and a heat-conducting plate (503) fixedly connected inside the melting tank (2), the heat-conducting plate (503) being located inside the heating wire (502).

3. The raw material processing structure for lead-free solder bar production according to claim 2, characterized in that: The melting tank (2) is fixedly connected to a conveying channel (504), which is located inside the heat-conducting plate (503).

4. The raw material processing structure for lead-free solder bar production according to claim 3, characterized in that: A servo motor (505) is fixedly connected to the top of the melting tank (2), and a spiral stirring blade (506) is fixedly connected to the output end of the servo motor (505). The spiral stirring blade (506) is located inside the conveying channel (504), and a control valve (507) is provided at the bottom of the conveying channel (504).

5. The raw material processing structure for lead-free solder bar production according to claim 3, characterized in that: The bottom of the mixing tank (1) is connected to a connecting channel (3), the bottom of the connecting channel (3) is connected to a discharge pipe (6), and the bottom of the discharge pipe (6) is connected to a conveying channel (504).

6. The raw material processing structure for lead-free solder bar production according to claim 2, characterized in that: A temperature sensor (7) is provided on the outside of the melting tank (2), and the temperature sensor (7) is electrically connected to the controller (501).

7. The raw material processing structure for lead-free solder bar production according to claim 1, characterized in that: A connecting spring (8) is fixedly connected inside the connecting seat (407), and the connecting spring (8) is fixedly connected to the inner side of the scraper (408).

8. The raw material processing structure for lead-free solder bar production according to claim 1, characterized in that: The top of the mixing tank (1) is connected to a feed pipe (9), and a blockage block (10) is snapped into the top of the feed pipe (9).

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