A lead-free multi-alloy solder

Abstract

This invention relates to the field of tin alloy solder technology and discloses a lead-free multi-element alloy solder, a tin material. The tin material is formed by pouring molten liquid metal into the interior of a mold assembly and cooling it. The composition of the tin material includes tin, silver, copper, bismuth, antimony, and nickel. The weight ratio of the composition of the tin material is: tin: 92-93 parts; silver: 2-3.5 parts; copper: 0.46-0.54 parts; bismuth: 1-2 parts; antimony: 2.5-3 parts; nickel: 0.05-0.1 parts. This invention uses a first scraper that moves on the top of the mold body to scrape off oxides and impurities on the surface of the liquid metal. When the first scraper moves to one side of the fixed frame, it moves to the side of the second scraper. Then the first scraper moves upward, and the second scraper can scrape off the oxides and impurities on the first scraper, avoiding secondary pollution. This allows for the cyclical scraping of oxides and impurities on the surface of the liquid metal, improving the aesthetics of the tin material and the overall quality of the soldering.

Description

Technical Field

[0001] This invention relates to the field of tin alloy solder technology, specifically a lead-free multi-element alloy solder. Background Technology

[0002] With increasing environmental protection requirements, lead-free solders have been developed, and their performance requirements are becoming increasingly stringent. Solders suitable for harsh environments or demanding scenarios are now in demand. Different industries have different requirements for solder materials: the automotive electronics industry requires high temperature resistance and high mechanical strength; the new energy industry requires high mechanical strength and resistance to complex outdoor environments; the microelectronics industry requires high mechanical strength and high drop resistance; and the photovoltaic industry requires resistance to aging in complex outdoor environments. To meet the above requirements for solder bars, a lead-free multi-alloy solder is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a lead-free multi-element alloy solder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a lead-free multi-element alloy solder, comprising...

[0005] The tin material is formed by pouring molten liquid metal into the interior of a mold assembly and cooling it. The composition of the tin material includes tin, silver, copper, bismuth, antimony, and nickel.

[0006] The weight ratio of the tin material is as follows:

[0007] Tin: 92-93 parts;

[0008] Silver: 2-3.5 parts;

[0009] Copper: 0.46-0.54 parts;

[0010] Bismuth: 1-2 parts;

[0011] Antimony: 2.5-3 parts;

[0012] Nickel: 0.05-0.1 parts.

[0013] This invention also provides a manufacturing process for lead-free multi-element alloy solder, comprising the following steps:

[0014] S1. The raw materials tin ingots, silver, copper, antimony, bismuth and nickel are manually added into the tin melting furnace in a certain proportion;

[0015] S2. The raw materials are heated to 345℃-355℃ in the tin melting furnace, and after adding sawdust to remove impurities, antioxidants are added and stirred for 15-30 minutes.

[0016] S3. A small amount of molten tin waste gas will be generated during the molten tin process. After the molten tin waste gas is cooled, it will be treated by a dust collector before being discharged.

[0017] S4. A certain amount of tin dross will be generated in the tin melting furnace, and the tin dross will be collected by the raw material supplier;

[0018] S5. Pour the molten liquid metal into the interior of the mold assembly, and obtain tin material after the liquid metal cools down.

[0019] Preferably, the bottom of the mold assembly is provided with a support platform, the top of the support platform is provided with a template assembly, and the top of the support platform is provided with a cleaning assembly in front of the template assembly.

[0020] The mold assembly includes a mold body, a casting groove, and a cooling water guide cavity. The mold body is mounted on the top of a support platform. The casting groove is located on the top of the mold body. The cooling water guide cavity is located inside the mold body. Both ends of the cooling water guide cavity are provided with liquid guiding pipes. A top post is movably inserted into the bottom of the casting groove. A deep groove is opened on the rear side of the mold body. A push post is movably inserted into the deep groove. One end of the push post abuts against the bottom end of the top post. A first telescopic spring is fixedly connected between the push post and the mold body. A reset component is provided on one side of the top post.

[0021] Preferably, the reset assembly includes a fixing block and a second telescopic spring. The fixing block is fixedly connected to one side of the top column, and the second telescopic spring is fixedly connected to the top of the fixing block and the inner side of the deep groove.

[0022] Preferably, the template assembly includes a bracket, an electric push rod, a connector, and a character mold. The bracket is mounted on the top of the support platform, the electric push rod is mounted on the top of the bracket, the connector is mounted on the push rod end of the electric push rod, and the character mold is mounted on the connector. The top of the character mold has an installation groove, the connector is inserted into the installation groove, a limiting post is movably inserted into the top of the character mold, one end of the limiting post is inserted into the installation groove, and a first tension spring is movably sleeved on the outer side of the limiting post at the top of the character mold.

[0023] Preferably, one end of the first tension spring is fixedly connected to the top of the character mold, and the other end of the first tension spring is fixedly connected to the outside of the limiting post.

[0024] Preferably, the cleaning assembly includes a column, a fixing frame, and a first guide column. The column is fixedly connected to the top of the support platform, the fixing frame is fixedly connected to the front side of the support platform, the first guide column is fixedly connected between the column and the fixing frame, a fixing ring is movably sleeved on the outer side of the first guide column, a second guide rod is fixedly connected to the outer side of the fixing ring, the bottom end of the second guide rod is slidably connected to the top of the support platform, a connecting ring is movably sleeved on the outer side of the second guide rod, a connecting seat is rotatably connected to one side of the connecting ring, a first scraper is installed on the other side of the connecting ring, a second scraper is installed on the inner side of the fixing frame, and a drive assembly is installed on both sides of the top of the support platform.

[0025] Preferably, the drive assembly includes a support plate, a geared motor, and a rotating base. The support plate is mounted on the top of the support platform, the geared motor is mounted on one side of the support plate, the rotating base is fixedly connected to the output shaft of the geared motor, a third guide post is movably passed through one side of the rotating base, a second tension spring is movably sleeved on the outer side of the third guide post, and one end of the third guide post is fixedly connected to one side of the connecting base.

[0026] Preferably, one end of the second tension spring is fixedly connected to one side of the rotary seat, and the other end of the second tension spring is fixedly connected to the outside of the third guide post.

[0027] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0028] 1. This invention obtains a highly reliable lead-free solder by adding other elements to tin-copper solder. Antimony is used to improve soldering performance; bismuth is used to lower the melting point of the solder, thus expanding its application window, but it also improves mechanical properties; silver and nickel are used to improve the mechanical strength, corrosion resistance and high temperature resistance of the solder; through the reasonable ratio and synergistic effect of each element, the solder can meet the needs of more applications.

[0029] 2. In this invention, the first scraper moves on the top of the mold body to scrape off oxides and impurities on the surface of the liquid metal. When the first scraper moves to one side of the fixed frame, it moves to the side of the second scraper. Then the first scraper moves upward, and the second scraper can scrape off the oxides and impurities on the first scraper to avoid secondary pollution. Then the first scraper moves horizontally. The movement trajectory of the first scraper is rectangular, which can complete the cyclic scraping of oxides and impurities on the surface of the liquid metal, improving the aesthetics of the tin material and the overall quality of the welding.

[0030] 3. When the letter mold needs to be replaced, the limiting post is pulled upward to move it upward, so that one end of the limiting post is disengaged from the inside of the mounting groove. At this time, the letter mold can be pushed to disengage from the outside of the connector, thus completing the disassembly of the letter mold. The operation is simple and quick. By replacing the letter mold, it is possible to match the markings of different specifications of tin materials. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0034] Figure 3 For the present invention Figure 2 Enlarged structural diagram of area A in the middle;

[0035] Figure 4 This is a schematic diagram of the rear view structure of the present invention;

[0036] Figure 5 For the present invention Figure 4 Enlarged structural diagram of area A in the middle;

[0037] Figure 6 This is a top view of the structure of the present invention.

[0038] Explanation of reference numerals in the attached drawings: 1. Support platform; 21. Mold body; 22. Casting tank; 23. Cooling water guide cavity; 24. Liquid guide pipe; 25. Top column; 26. Deep groove; 27. Push column; 28. First telescopic spring; 29. ​​Fixing block; 210. Second telescopic spring; 31. Bracket; 32. Electric push rod; 33. Connector; 34. Character mold; 35. Mounting groove; 36. Limiting column; 37. First tension spring; 41. Column; 42. Fixing frame; 43. First guide column; 44. Fixing ring; 45. Second guide rod; 46. Connecting ring; 47. Connecting seat; 48. First scraper; 49. Second scraper; 51. Support plate; 52. Gear motor; 53. Rotary seat; 54. Third guide column; 55. Second tension spring. Detailed Implementation

[0039] 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.

[0040] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0041] Example 1

[0042] This invention provides a technical solution: a lead-free multi-element alloy solder, comprising...

[0043] Tin solder is formed by pouring molten liquid metal into a mold assembly and allowing it to cool and solidify. The composition of tin solder includes tin, silver, copper, bismuth, antimony, and nickel; the weight ratio of the tin solder composition is: tin: 93 parts; silver: 2.6 parts; copper: 0.49 parts; bismuth: 1.5 parts; antimony: 2.8 parts; nickel: 0.07 parts. Tin and copper are the most basic and common metallic elements in lead-free solder. High-reliability lead-free solder is obtained by adding other elements to tin-copper solder. Antimony is used to improve soldering performance; bismuth is used to lower the solder's melting point, expanding its application window, but it also improves mechanical properties; silver and nickel are used to improve the solder's mechanical strength, corrosion resistance, and high-temperature resistance. The reasonable proportions and synergistic effects of these elements ensure that the solder meets the application requirements.

[0044] This invention also provides a manufacturing process for lead-free multi-element alloy solder, comprising the following steps:

[0045] S1. The raw materials tin ingots, silver, copper, antimony, bismuth and nickel are manually added into the tin melting furnace in a certain proportion;

[0046] S2. The raw materials are heated to 350°C in a tin melting furnace, and after adding sawdust to remove impurities, antioxidants are added and stirred for 25 minutes.

[0047] S3. A small amount of molten tin waste gas will be generated during the molten tin process. After the molten tin waste gas is cooled, it will be treated by a dust collector before being discharged.

[0048] S4. A certain amount of tin dross will be generated in the tin melting furnace, and the tin dross will be collected by the raw material supplier;

[0049] S5. Pour the molten liquid metal into the interior of the mold assembly, and obtain tin material after the liquid metal cools down.

[0050] Example 2

[0051] Please see Figure 1-6 Unlike Embodiment 1, the bottom of the mold assembly is provided with a support platform 1, the top of the support platform 1 is provided with a template assembly, and the top of the support platform 1 is provided with a cleaning assembly in front of the template assembly.

[0052] By setting up a mold assembly, the solidification rate of liquid metal can be increased, and the solidified tin material can be easily cut. The mold assembly includes a mold body 21, a casting tank 22, and a cooling water guide cavity 23. The mold body 21 is installed on the top of the support platform 1, the casting tank 22 is set on the top of the mold body 21, and the cooling water guide cavity 23 is set inside the mold body 21. Both ends of the cooling water guide cavity 23 are provided with liquid guiding pipes 24. Before the liquid metal is cast, the cooling water is introduced into the interior of the cooling water guide cavity 23 through the liquid guiding pipes 24, and then the cooling water is discharged through another liquid guiding pipe 24. The circulating water can cool the liquid metal, thereby increasing the forming rate of the liquid metal.

[0053] During material feeding, the electric push rod 32 drives the character mold 34 to reset, causing the character mold 34 to detach from the top of the mold body 21. Then, the push rod 27 is pushed to move, and the first telescopic spring 28 is compressed, causing one end of the push rod 27 to push the top rod 25 to move upward, causing the top rod 25 to push one end of the solder material to move. At this time, the second telescopic spring 210 is compressed, causing one end of it to detach from the inside of the casting tank 22, thus facilitating the removal of the solder material. The top rod 25 is movably inserted into the bottom of the casting tank 22. A deep groove 26 is opened on the rear side of the mold body 21, and the push rod 27 is movably inserted into the inside of the deep groove 26. One end of the push rod 27 abuts against the bottom end of the top rod 25.

[0054] To facilitate the casting of tin material, a first telescopic spring 28 is fixedly connected between the push post 27 and the mold body 21. A reset assembly is provided on one side of the top post 25. The reset assembly includes a fixing block 29 and a second telescopic spring 210. The fixing block 29 is fixedly connected to one side of the top post 25, and the second telescopic spring 210 is fixedly connected to the top of the fixing block 29 and the inner side of the deep groove 26. After the tin material is removed, by releasing the push post 27, the push post 27 will reset under the force of the first telescopic spring 28. At the same time, the second telescopic spring 210 can drive the top post 25 to reset, so that one end of the top post 25 moves into the interior of the deep groove 26.

[0055] By setting up the template component, it is easy to identify the tin material and facilitate the replacement of the character mold 34. The template component includes a bracket 31, an electric push rod 32, a connector 33, and a character mold 34. The bracket 31 is installed on the top of the support platform 1, the electric push rod 32 is installed on the top of the bracket 31, the connector 33 is installed on the push rod end of the electric push rod 32, and the character mold 34 is installed on the connector 33. The top of the character mold 34 has a mounting groove 35, and the connector 33 is inserted into the mounting groove 35. A limiting post 36 is movably inserted into the top of the character mold 34. One end of the limiting post 36 is inserted into the mounting groove 35, and a first tension spring 37 is movably sleeved on the outside of the limiting post 36 at the top of the character mold 34. One end of the first tension spring 37 is fixedly connected to the top of the character mold 34, and the other end of the first tension spring 37 is fixedly connected to the outside of the limiting post 36. The push rod of the electric push rod 32 drives the character mold 34 to abut against the top of the mold body 21. The numbers at the bottom of the character mold 34 can be formed after the liquid metal solidifies. When the character mold 34 needs to be replaced, the limiting post 36 is pulled upward to move it upward, so that one end of the limiting post 36 is disengaged from the inside of the mounting groove 35. At this time, the character mold 34 can be pushed to disengage from the outside of the connector 33, thereby completing the disassembly of the character mold 34. The operation is simple and quick. The character mold 34 can be replaced to match the markings of different specifications of tin materials.

[0056] During installation, the mounting slot 35 is engaged with the outside of the connector 33, causing the connector 33 to abut against the inclined surface of the limiting post 36, thereby pushing the limiting post 36 upward. At this time, the first tension spring 37 is in a stretched state. When one end of the limiting post 36 disengages from the connector 33, the first tension spring 37 drives the limiting post 36 to reset, so that the limiting post 36 is engaged with the outside of the connector 33, thus completing the installation of the character mold 34.

[0057] By setting up a cleaning component, oxides and impurities on the surface of liquid metal can be scraped off. When the first scraper 48 moves to one side of the fixing frame 42, it moves to the side of the second scraper 49. Then, the first scraper 48 moves upward, and the second scraper 49 can scrape off the oxides and impurities on the first scraper 48, avoiding secondary contamination. Then, the first scraper 48 moves horizontally. The movement trajectory of the first scraper 48 is rectangular, which can complete the scraping of oxides and impurities on the surface of liquid metal, improving the aesthetics of the tin material and the overall quality of the soldering. The cleaning component includes a column 41, a fixing frame 42, and a first guide column. 43. The column 41 is fixedly connected to the top of the support platform 1, the fixing frame 42 is fixedly connected to the front side of the support platform 1, the first guide column 43 is fixedly connected between the column 41 and the fixing frame 42, the outer side of the first guide column 43 is movably sleeved with a fixing ring 44, the outer side of the fixing ring 44 is fixedly connected with a second guide rod 45, the bottom end of the second guide rod 45 is slidably connected to the top of the support platform 1, the outer side of the second guide rod 45 is movably sleeved with a connecting ring 46, one side of the connecting ring 46 is rotatably connected with a connecting seat 47, the other side of the connecting ring 46 is equipped with a first scraper 48, the inner side of the fixing frame 42 is equipped with a second scraper 49, and the top two sides of the support platform 1 are equipped with drive components.

[0058] By setting up a drive assembly, the first scraper 48 can be moved along a rectangular trajectory. The drive assembly includes a support plate 51, a reduction motor 52, and a rotating base 53. The support plate 51 is mounted on the top of the support platform 1, the reduction motor 52 is mounted on one side of the support plate 51, and the rotating base 53 is fixedly connected to the output shaft of the reduction motor 52. A third guide post 54 is movably passed through one side of the rotating base 53. A second tension spring 55 is movably sleeved on the outer side of the third guide post 54. One end of the second tension spring 55 is fixedly connected to one side of the rotating base 53, and the other end of the second tension spring 55 is fixedly connected to the outer side of the third guide post 54. One end of the third guide post 54 is fixedly connected to one side of the connecting seat 47. The output shaft of the high-speed motor 52 drives the rotating seat 53 to rotate, and the rotating seat 53 can drive the third guide post 54 to rotate. At this time, one end of the third guide post 54 drives the connecting ring 46 on the connecting seat 47 to slide inside the second guide rod 45. The second tension spring 55 is in a stretched state. At this time, the third guide post 54 gives the connecting seat 47 a thrust, which can prevent the second guide rod 45 from moving. When the first scraper 48 abuts against the top of the mold body 21, the connecting seat 47 on the third guide post 54 will drive the second guide rod 45 to slide, so that the first scraper 48 moves on the top of the mold body 21, which can scrape off the oxides and impurities on the surface of the liquid metal.

[0059] In terms of working principle or structural principle, tin and copper are the most basic and conventional metallic elements in lead-free solder. High-reliability lead-free solder is obtained by adding other elements to tin-copper solder. Antimony is used to improve soldering performance; bismuth is used to lower the solder's melting point, widening its application window, but it also improves mechanical properties; silver and nickel are used to improve the solder's mechanical strength, corrosion resistance, and high-temperature resistance. The reasonable proportions and synergistic effects of these elements ensure that the solder meets the requirements of its application.

[0060] When the molten liquid metal is poured, the electric push rod 32 is extended by controlling the switch group. The push rod 32 drives the character mold 34 to abut against the top of the mold body 21. The numbers set at the bottom of the character mold 34 can form numbers after the liquid metal solidifies, making it easy to identify the tin material. Then, the liquid metal is introduced into the casting tank 22, and the geared motor 52 is started by controlling the switch group. The output shaft of the geared motor 52 drives the rotating seat 53 to rotate. The rotating seat 53 can drive the third guide post 54 to rotate. At this time, one end of the third guide post 54 drives the connecting ring 46 on the connecting seat 47 to slide inside the second guide rod 45. The second tension spring 55 is in a stretched state. At this time, the third guide post 54 gives the connecting seat 47 a push force, which can prevent the second guide rod 45 from moving. When the first scraper 48 abuts against the top of the mold body 21, the connecting seat 47 on the third guide post 54 will drive the second guide rod 45 to move. The sliding motion allows the first scraper 48 to move on top of the mold body 21, scraping away oxides and impurities from the surface of the liquid metal. When the first scraper 48 moves to one side of the fixing frame 42, it moves to the side of the second scraper 49. Then, the first scraper 48 moves upward, and the second scraper 49 scrapes away the oxides and impurities on the first scraper 48, preventing secondary contamination. Then, the first scraper 48 moves horizontally. The movement trajectory of the first scraper 48 is rectangular, which can complete the scraping of oxides and impurities from the surface of the liquid metal, improving the aesthetics of the tin material and the overall quality of the welding.

[0061] Before the liquid metal is cast, cooling water is introduced into the cooling water guide cavity 23 through the liquid guide pipe 24, and then the cooling water is discharged through another liquid guide pipe 24. The circulating water can cool the liquid metal, thereby increasing the forming rate of the liquid metal. When the character mold 34 needs to be replaced, pull the limiting post 36 upward to move it upward, so that one end of the limiting post 36 is disengaged from the inside of the mounting groove 35. At this time, the character mold 34 can be pushed to disengage from the outside of the connector 33, thus completing the disassembly of the character mold 34. The operation is simple and quick. The character mold 34 can be replaced to match the markings of different specifications of tin materials. During installation, the mounting groove 35 is snapped onto the outside of the connector 33, so that the connector 33 abuts against the inclined surface of the limiting post 36, thereby pushing the limiting post 36 upward. At this time, the first tension spring 37 is in a stretched state. When one end of the limiting post 36 is disengaged from the connector 33, the first tension spring 37 drives the limiting post 36 to reset, so that the limiting post 36 is snapped onto the outside of the connector 33, thus completing the installation of the character mold 34.

[0062] After the tin material cools, the electric push rod 32 drives the character mold 34 to reset, causing the character mold 34 to detach from the top of the mold body 21. Then, the push rod 27 is pushed to move, and the first telescopic spring 28 is compressed, causing one end of the push rod 27 to push the top rod 25 to move upward, causing the top rod 25 to push one end of the tin material to move. At this time, the second telescopic spring 210 is compressed, causing one end of it to detach from the inside of the casting tank 22, thus facilitating the removal of the tin material and saving time and effort. After the tin material is removed, by releasing the push rod 27, the push rod 27 will reset under the force of the first telescopic spring 28. At the same time, the second telescopic spring 210 can drive the top rod 25 to reset, causing one end of the top rod 25 to move into the inside of the deep tank 26.

[0063] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A lead-free multi-alloy solder, characterized by: Comprising A tin material, which is internally cooled and formed by pouring a molten liquid metal into a mold assembly, the composition of the tin material comprising: tin, silver, copper, bismuth, antimony, and nickel; The composition of the tin material is in parts by weight ratio: Tin: 92-93 parts; Silver: 2-3.5 parts; Copper: 0.46-0.54 parts; Bismuth: 1-2 parts; Antimony: 2.5-3 parts; Nickel: 0.05-0.1 parts.

2. The process for producing a lead-free multi-alloy solder according to claim 1, wherein Comprising the following steps: S1, raw tin ingot, silver, copper, antimony, bismuth and nickel are manually put into the tin melting furnace according to certain proportion; S2, the raw materials are heated to 345-355℃ in the tin melting furnace, after adding wood chips for impurity removal, then adding antioxidant, and stirring for 15-30min; S3, a small amount of molten tin waste gas is generated during the melting process, which is discharged after cooling and dust removal treatment; S4, a certain amount of tin slag is generated from the tin melting furnace, which is collected by the raw material supplier; S5, pour the molten liquid metal into the inside of the mold assembly, and get the tin material after the liquid metal cools down.

3. The process for producing a lead-free multi-alloy solder according to claim 2, wherein: The bottom of the mold assembly is provided with a supporting table (1), the top of the supporting table (1) is provided with a mold plate assembly, and the front side of the top of the supporting table (1) is provided with a cleaning assembly; The mold assembly comprises a mold body (21), a pouring groove (22) and a cooling water flow guide cavity (23), the mold body (21) is installed on the top of the supporting table (1), the pouring groove (22) is arranged on the top of the mold body (21), the cooling water flow guide cavity (23) is arranged in the inside of the mold body (21), both ends of the cooling water flow guide cavity (23) are provided with liquid guide pipes (24), the bottom of the pouring groove (22) is movably inserted with a top column (25), the rear side of the mold body (21) is provided with a deep groove (26), the inside of the deep groove (26) is movably inserted with a push column (27), one end of the push column (27) abuts against the bottom end of the top column (25), the first extension spring (28) is fixedly connected between the push column (27) and the mold body (21), and the one side of the top column (25) is provided with a reset assembly.

4. The process of claim 3, wherein the alloy is a lead-free multi-alloy solder. The reset assembly comprises a fixed block (29) and a second extension spring (210), the fixed block (29) is fixedly connected to one side of the top column (25), and the second extension spring (210) is fixedly connected to the top of the fixed block (29) and the inside of the deep groove (26).

5. The process of claim 3, wherein the alloy is a lead-free multi-alloy solder. The template assembly includes a support (31), an electric push rod (32), a connecting head (33) and a character matrix (34), the support (31) is installed on the top of the support table (1), the electric push rod (32) is installed on the top of the support (31), the connecting head (33) is installed on the push rod end of the electric push rod (32), the character matrix (34) is installed on the connecting head (33), the top of the character matrix (34) is provided with a mounting groove (35), the connecting head (33) is inserted into the inside of the mounting groove (35), the top of the character matrix (34) is movably inserted into a limiting column (36), one end of the limiting column (36) is inserted into the inside of the mounting groove (35), and the outside of the limiting column (36) is movably sleeved with a first tension spring (37) on the top of the character matrix (34).

6. The process for producing a lead-free multi-alloy solder according to claim 5, wherein: One end of the first tension spring (37) is fixedly connected to the top of the character matrix (34), and the other end of the first tension spring (37) is fixedly connected to the outside of the limiting column (36).

7. The process of claim 3, wherein the alloy is a lead-free multi-component alloy solder. The cleaning assembly includes a stand column (41), a fixing frame (42) and a first guide column (43), the stand column (41) is fixedly connected to the top of the support table (1), the fixing frame (42) is fixedly connected to the front side of the support table (1), and the first guide column (43) is fixedly connected between the stand column (41) and the fixing frame (42), the outside of the first guide column (43) is movably sleeved with a fixed ring (44), the outside of the fixed ring (44) is fixedly connected with a second guide rod (45), the bottom end of the second guide rod (45) is slidably connected to the top of the support table (1), the outside of the second guide rod (45) is movably sleeved with a connecting ring (46), one side of the connecting ring (46) is rotatably connected with a connecting seat (47), the other side of the connecting ring (46) is provided with a first scraper (48), the inside of the fixing frame (42) is provided with a second scraper (49), and the top of the support table (1) is provided with a driving assembly.

8. The production process of a lead-free multi-element alloy solder according to claim 7, characterized in that: The driving assembly includes a support plate (51), a speed reducer motor (52) and a rotating seat (53), the support plate (51) is installed on the top of the support table (1), the speed reducer motor (52) is installed on one side of the support plate (51), and the rotating seat (53) is fixedly connected to the output shaft of the speed reducer motor (52). The one side of the rotating seat (53) movably penetrates a third guide column (54), the outside of the third guide column (54) movably sleeved with a second tension spring (55), and one end of the third guide column (54) is fixedly connected to one side of the connecting seat (47).

9. The production process of a lead-free multi-element alloy solder according to claim 8, characterized in that: One end of the second tension spring (55) is fixedly connected to one side of the rotating seat (53), and the other end of the second tension spring (55) is fixedly connected to the outside of the third guide column (54).

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