Screening and storing device for tin-based spherical welding powder for SMT

Abstract

The invention discloses a tin-based spherical welding powder screening and storing device for SMT. The tin-based spherical welding powder screening and storing device comprises a box body, an opening is formed in one side of the top of the box body, a primary screening mechanism is installed on the outer side of the opening of the box body, an assembling frame is installed in the box body, a driving motor is installed on one side of the assembling frame, and the power output end of the driving motor is connected with a transmission assembly; the top of the transmission assembly is matched with the primary screening mechanism, one side of the transmission assembly is connected with a conveying mechanism, the conveying mechanism is installed on the assembling frame and located on the lower side of the opening, the output end of the conveying mechanism is connected with a fine screening mechanism, the outer side of the fine screening mechanism is provided with a material collecting assembly, and the output end of the material collecting assembly is connected with a qualified product storage box; the output end of the fine screening mechanism is connected with a discharging disc, the output end of the discharging disc is connected with an unqualified product containing box, the qualified product containing box and the unqualified product containing box are both installed at the bottom of the inner side of the box body, installation assemblies are installed on the outer side of the qualified product containing box and the outer side of the unqualified product containing box, and receding grooves are formed in the positions, on the outer side of the qualified product containing box and the outer side of the unqualified product containing box, of the box body.

Description

Technical Field

[0001] The invention belongs to the technical field of tin-based spherical solder powder, and in particular relates to a sieving and storing device for tin-based spherical solder powder for SMT. Background Art

[0002] Tin-based alloy spherical solder powder is an indispensable connection material in the electronics industry. The application of surface mount technology (SMT), which uses solder paste as the main connection material, has made the electronic assembly process more efficient and miniaturized. SMT technology has become the mainstream of electronic assembly technology.

[0003] Solder paste is mainly composed of solder powder and flux paste, of which solder powder accounts for about 88-90% by weight. Solder powder is one of the most important materials for preparing solder paste. One of the most important quality indicators of solder powder is the particle size distribution of the powder, that is, the particle size distribution specification of the product. The particle size distribution can only be within a certain range. Powder that exceeds the particle size range is returned powder. Therefore, a screening and collection device is required to screen the tin-based spherical solder powder during the production process.

[0004] However, the existing screening and storage device cannot remove impurities in the tin-based spherical solder powder during use. Moreover, when the material is fed and screened, too much tin-based spherical solder powder is poured in at one time, causing the tin-based spherical solder powder to pile up and then cause the screen to be blocked, thereby reducing the screening effect and affecting work efficiency. Moreover, the powder cannot be stored in time after screening, which affects subsequent use. Summary of the Invention

[0005] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a device for screening and storing tin-based spherical solder powder for SMT.

[0006] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0007] The device for screening and storing tin-based spherical solder powder for SMT comprises a box body, a top side of the box body is provided with an opening, a primary screening mechanism is installed on the outer side of the opening of the box body, an assembly frame is installed in the box body, a driving motor is installed on one side of the assembly frame, a power output end of the driving motor is connected with a transmission component, the top of the transmission component cooperates with the primary screening mechanism, one side of the transmission component is connected with a conveying mechanism, the conveying mechanism is installed on the assembly frame and is located at the lower side of the opening, the output end of the conveying mechanism is connected with a fine screening mechanism, a material receiving component is provided on the outer side of the fine screening mechanism, the output end of the material receiving component is connected with a qualified storage box, the output end of the fine screening mechanism is connected with a discharging tray, the output end of the discharging tray is connected with an unqualified storage box, the qualified storage box and the unqualified storage box are both installed at the bottom of the inner side of the box body, the outer sides of the qualified storage box and the unqualified storage box are provided with mounting components, the box body is provided with an air avoidance groove on the outer sides of the qualified storage box and the unqualified storage box, and the top outer side of the air avoidance groove is hinged with a dustproof plate.

[0008] The primary screening mechanism further defines that the primary screening mechanism includes side panels mounted on both sides of the opening, with a plurality of guide sleeves evenly mounted on the side panels. The guide sleeves are slidably connected to a slide rod, an L-shaped clamping seat is connected to the inner side of the slide rod, and a plurality of springs are installed between the L-shaped clamping seat and the side panels. A primary screening frame is mounted between the L-shaped clamping seats on both sides. The top of the primary screening frame is provided with a discharge port arranged in a trumpet-shaped structure, and a removable primary screening plate is mounted on the bottom of the primary screening frame. This structural design can screen out impurities contained in tin-based spherical solder powder.

[0009] It is further defined that the transmission assembly includes a transmission rod connected to the power output end of the drive motor, the top of the transmission rod passes through the box and extends to the outside thereof, a bearing is installed on the upper side of the transmission rod, the bearing is installed on the top surface of the box, an eccentric cam is installed on the top of the transmission rod, the eccentric cam contacts the outside of the slide bar, and a first bevel gear is installed on the lower side of the transmission rod, the first bevel gear is meshed with a second bevel gear, the second bevel gear is connected to a linkage rod, and the linkage rod is connected to the conveying mechanism. This structural design can drive the primary screening mechanism, the conveying mechanism, and the fine screening mechanism to move.

[0010] The conveying mechanism further defines a conveying box mounted on an assembly frame, a conveying channel disposed within the conveying box, a conveying rod mounted within the conveying channel, one side of the conveying rod connected to a linkage rod, the other side of the conveying rod connected to a fine screening mechanism, a spiral conveying blade mounted on the outer side of the conveying rod, and a feed chute disposed at the top of the conveying box, connected to the feed channel, the feed chute being positioned directly below the opening. This structural design facilitates the uniform delivery of tin-based spherical solder powder into the fine screening mechanism for screening.

[0011] The fine screening mechanism further defines a mechanism comprising a rotating rod connected to a conveying rod, with rotating frames mounted on the left and right sides of the rotating rod. A feed frame is mounted on the outside of the left rotating frame, which is rotatably mounted outside the output end of the conveying channel. A discharge frame is mounted on the outside of the right and left rotating frames, which is rotatably mounted within a discharge tray. A fine screening drum is mounted between the feed frame and the discharge frame. This structural design facilitates the separation of tin-based spherical solder powder into finished product powder and returned powder.

[0012] It is further defined that the conveying box is equipped with a guide frame on the outer side of the output end of the conveying channel, and the guide frame is arranged in the feeding frame. Such a structural design facilitates the tin-based spherical solder powder output by the conveying mechanism to enter the fine screening mechanism.

[0013] The material receiving assembly further defines a material receiving box mounted on the outside of the fine screening drum, with inclined feed chutes provided on the front and rear sides of the bottom of the material receiving box, a confluence trough provided between the front and rear inclined feed chutes, a guide plate installed in the confluence trough, inclined from left to right and from bottom to top, a material receiving channel installed at the lowest point of the guide plate, and an output end of the material receiving channel provided above the qualified receiving box. This structural design facilitates the guided output of the finished powder screened by the fine screening mechanism.

[0014] It is further defined that the discharge tray is provided with a discharge channel at the output end of the discharge frame, and the output end of the discharge channel is arranged on the upper side of the unqualified storage box. Such a structural design facilitates the guided discharge of the returned powder.

[0015] The mounting assembly further defines a configuration in which the mounting assembly includes anti-vibration seats mounted on the front and rear sides of the bottom of the box body, the anti-vibration seats being provided with a slide groove, a slider being slidably connected within the slide groove, the slider being mounted on either side of the qualified storage box and the unqualified storage box, a cover plate being mounted between the anti-vibration seats on both sides, the cover plate being disposed on top of the qualified storage box and the unqualified storage box, and the bottom output ends of the receiving channel and the discharging channel being both mounted through the cover plate. This structural design prevents the qualified storage box and the unqualified storage box from shaking after installation.

[0016] The invention further defines that the cover plate is provided with an assembly groove on the upper side of the qualified storage box, the assembly groove is provided with an assembly seat, the assembly seat is provided with a drying box, the bottom of the drying box is provided with a plurality of mesh holes, and a desiccant is placed in the drying box. This structural design dries and stores qualified solder powder for subsequent use.

[0017] The beneficial effects of the present invention are as follows: the present invention can remove impurities in the tin-based spherical solder powder by arranging a primary screening mechanism, thereby improving the subsequent screening effect; by arranging a conveying mechanism, the tin-based spherical solder powder can be evenly output to the fine screening mechanism, thereby preventing the occurrence of excessive tin-based spherical solder powder being poured in at one time, causing the tin-based spherical solder powder to be piled up, and then causing the clogging of the fine screening mechanism, thereby reducing the screening effect and affecting the work efficiency; the tin-based spherical solder powder is screened out into qualified solder powder and return material powder through the fine screening mechanism, and is timely classified and output for storage under the effect of the receiving component and the discharge tray, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0019] Figure 1 This is a schematic diagram of the axial structure of a device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of a device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the planar cross-sectional structure of the primary screening mechanism of the device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of a receiving assembly of a device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0023] Figure 5 This is an enlarged structural diagram of position A of the device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0024] Figure 6 This is an enlarged structural diagram of position B of the device for screening and storing tin-based spherical solder powder for SMT according to an embodiment of the present invention;

[0025] The main component symbols are described as follows:

[0026] Box body 1, opening 2, primary screening mechanism 3, assembly frame 4, drive motor 5, transmission assembly 6, conveying mechanism 7, fine screening mechanism 8, material receiving assembly 9, qualified storage box 10, discharge tray 11, unqualified storage box 12, installation assembly 13, air avoidance groove 14, dustproof plate 15, side plate 16, guide sleeve 17, slide bar 18, L-shaped clamp seat 19, spring 20, primary screening frame 21, discharge port 22, primary screening plate 23, transmission rod 24, bearing 25, eccentric cam 26, first bevel gear 27, second bevel gear 2 8. Linkage rod 29, conveying box 30, conveying channel 31, conveying rod 32, spiral conveying blade 33, discharge chute 34, rotating rod 35, rotating frame 36, feed frame 37, discharge frame 38, fine screening drum 39, guide frame 40, material collection box 41, inclined discharge chute 42, confluence trough 43, guide plate 44, material collection channel 45, discharge channel 46, anti-movement seat 47, slide 48, slider 49, cover plate 50, assembly groove 51, assembly seat 52, drying box 53, mesh 54, desiccant 55. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0028] Example 1, as Figure 1 and Figure 2 As shown, a sieving and storing device for tin-based spherical solder powder for SMT is provided. An opening 2 is provided on one side of the top of the box body 1. A primary screening mechanism 3 is installed on the outside of the opening 2 of the box body 1. An assembly rack 4 is installed in the box body 1. A drive motor 5 is installed on one side of the assembly rack 4. The power output end of the drive motor 5 is connected to a transmission component 6. The top of the transmission component 6 cooperates with the primary screening mechanism 3. One side of the transmission component 6 is connected to a conveying mechanism 7. The conveying mechanism 7 is installed on the assembly rack 4 and is located at the lower side of the opening 2. The output end of the conveying mechanism 7 is connected to a fine screening mechanism 8. A material receiving assembly 9 is provided on the outside of the screening mechanism 8, and the output end of the material receiving assembly 9 is connected to a qualified storage box 10, the output end of the fine screening mechanism 8 is connected to a discharge tray 11, and the output end of the discharge tray 11 is connected to an unqualified storage box 12, the qualified storage box 10 and the unqualified storage box 12 are both installed at the bottom inner side of the box body 1, and an installation assembly 13 is installed on the outside of the qualified storage box 10 and the unqualified storage box 12, and the box body 1 is provided with an air avoidance groove 14 on the outside of the qualified storage box 10 and the unqualified storage box 12, and a dustproof plate 15 is hinged on the outside of the top of the air avoidance groove 14.

[0029] In this embodiment, when in use, the drive motor 5 is started, so that the drive motor 5 drives the transmission component 6 to move, and the transmission component 6 drives the primary screening mechanism 3, the conveying mechanism 7 and the fine screening mechanism 8 to work, and then the tin-based spherical solder powder is poured into the primary screening mechanism 3, and the primary screening mechanism 3 performs preliminary screening on the tin-based spherical solder powder. Impurities in the tin-based spherical solder powder remain in the primary screening mechanism 3, and the tin-based spherical solder powder falls from the lower side of the opening 2 through the primary screening mechanism 3 into the conveying mechanism 7, and the conveying mechanism 7 conveys the tin-based spherical solder powder so that the tin-based spherical solder powder is evenly output from the conveying mechanism 7 to the fine screening mechanism 8 to prevent the tin-based spherical solder powder from accumulating. The fine screening mechanism 8 finely screens the tin-based spherical solder powder, and the qualified solder powder is screened out from the fine screening mechanism 8 and enters the material receiving component 9. The material receiving component 9 collects the qualified solder powder and outputs it to the qualified storage box 10 for storage. The returned powder remaining in the fine screening mechanism 8 is conveyed into the discharge tray 11, and output by the discharge tray 11 into the unqualified storage box 12 for storage. When it is necessary to take out the solder powder in the qualified storage box 10 and the unqualified storage box 12, by opening the dustproof plate 15 and pulling the qualified storage box 10 and the unqualified storage box 12 outward, they can be taken out from the installation component 13 in the box body 1.

[0030] Example 2, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 1, the primary screening mechanism 3 includes side panels 16 installed on both sides of the outside of the opening 2, and a number of guide sleeves 17 are evenly installed on the side panels 16. The guide sleeves 17 are slidably connected to the slide rod 18, and the inner side of the slide rod 18 is connected to the L-shaped clamp seat 19. A number of springs 20 are installed between the L-shaped clamp seat 19 and the side panels 16, and a primary screening frame 21 is installed between the L-shaped clamp seats 19 on both sides. The top of the primary screening frame 21 is provided with a discharge port 22 with a trumpet-shaped structure, and the bottom of the primary screening frame 21 is installed with a detachable primary screening plate 23.

[0031] In this embodiment, when in use, the transmission assembly 6 is driven by the driving motor 5, and the transmission assembly 6 pushes the slide bar 18 on one side, so that the slide bar 18 slides along the guide sleeve 17, and at the same time pushes the L-shaped clamp seat 19 on one side, and stretches the spring 20, and the L-shaped clamp seat 19 pushes the primary screening frame 21, and the primary screening frame 21 pushes the L-shaped clamp seat 19 on the other side, and the L-shaped clamp seat 19 pushes the slide bar 18 on the other side to slide along the guide sleeve 17, and at the same time squeezes the spring 20, so that the primary screening frame 21 moves, and the rotational movement of the transmission assembly 6 pushes the slide bar 18 on one side to move, so that the primary screening frame 21 can perform horizontal reciprocating motion, thereby screening the tin-based spherical solder powder through the primary screening plate 23, so that the impurities stay on the primary screening plate 23 after screening, and the solder powder enters the conveying mechanism 7 through the primary screening plate 23.

[0032] Example 3, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1, the transmission assembly 6 includes a transmission rod 24 connected to the power output end of the drive motor 5, the top of the transmission rod 24 passes through the box body 1 and extends to its outside, a bearing 25 is installed on the upper side of the transmission rod 24, the bearing 25 is installed on the top surface of the box body 1, an eccentric cam 26 is installed on the top of the transmission rod 24, the eccentric cam 26 is in contact with the outer side of the slide rod 18, a first bevel gear 27 is installed on the lower side of the transmission rod 24, the first bevel gear 27 is meshed with a second bevel gear 28, the second bevel gear 28 is connected to a linkage rod 29, and the linkage rod 29 is connected to the conveying mechanism 7.

[0033] In this embodiment, when in use, the transmission rod 24 is driven to rotate by the driving motor 5, and the transmission rod 24 rotates smoothly through the bearing 25. When the transmission rod 24 rotates, its top drives the eccentric cam 26 to rotate. When the eccentric cam 26 rotates, it pushes the slide bar 18 to move, thereby causing the primary screening mechanism 3 to perform the primary screening work, and the lower side of the transmission rod 24 drives the first bevel gear 27 to rotate, the first bevel gear 27 drives the second bevel gear 28, the second bevel gear 28 drives the linkage rod 29 to rotate, and the linkage rod 29 drives the conveying mechanism 7 to perform the conveying work.

[0034] Example 4, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1, the conveying mechanism 7 includes a conveying box 30 installed on the assembly frame 4, a conveying channel 31 is provided in the conveying box 30, a conveying rod 32 is installed in the conveying channel 31, one side of the conveying rod 32 is connected to the linkage rod 29, and the other side of the conveying rod 32 is connected to the fine screening mechanism 8, a spiral conveying blade 33 is installed on the outside of the conveying rod 32, and a discharge trough 34 connected to the conveying channel 31 is provided on the top of the conveying box 30, and the discharge trough 34 is arranged on the lower side of the opening 2.

[0035] In this embodiment, when in use, the conveying rod 32 is driven by the linkage rod 29, and the conveying rod 32 drives the spiral conveying blade 33 to move in the conveying channel 31 in the conveying box 30, so that the tin-based spherical solder powder that falls from the discharge chute 34 into the conveying channel 31 is evenly output to the fine screening mechanism 8 under the conveyance of the spiral conveying blade 33, and will not accumulate and affect the screening effect.

[0036] Example 5, as Figure 2As shown, this embodiment adds the following structure on the basis of embodiment 1, the fine screening mechanism 8 includes a rotating rod 35 connected to the conveying rod 32, and rotating frames 36 are installed on the left and right sides of the rotating rod 35, wherein a feed frame 37 is installed on the outer side of the left rotating frame 36, and the feed frame 37 is rotatably set on the outer side of the output end of the conveying channel 31, and a discharge frame 38 is installed on the outer side of the right and left rotating frames 36, and the discharge frame 38 is rotatably set in the discharge tray 11, and a fine screening drum 39 is installed between the feed frame 37 and the discharge frame 38.

[0037] In this embodiment, during operation, the conveying rod 32 drives the rotating rod 35 to rotate, and the two sides of the rotating rod 35 drive the rotating frame 36, and the rotating frame 36 drives the feed frame 37 and the discharge frame 38 to rotate, and the feed frame 37 and the discharge frame 38 drive the fine screening drum 39 to rotate, so that the tin-based spherical solder powder enters the fine screening drum 39 from the feed frame 37 for screening. After screening by the fine screening drum 39, qualified solder powder flows out from the fine screening drum 39, is collected and output through the receiving component 9, and the powder remaining in the fine screening mechanism 8 is the returned powder, which is finally transported into the discharge tray 11 for output.

[0038] Example 6, as Figure 2 and Figure 4 As shown, this embodiment adds the following structure on the basis of embodiment 4: the conveying box 30 is installed with a guide frame 40 on the outside of the output end of the conveying channel 31, and the guide frame 40 is set in the feeding frame 37.

[0039] In this embodiment, when in use, the tin-based spherical solder powder output from the conveying channel 31 can be output into the feeding frame 37 under the guidance effect of the guide frame 40, thereby improving the output effect.

[0040] Example 7, as Figure 4 and Figure 5 As shown, this embodiment adds the following structure on the basis of embodiment 1, the material receiving assembly 9 includes a material receiving box 41 installed on the outside of the fine screening drum 39, and inclined material discharge troughs 42 are provided on the front and rear sides of the bottom of the material receiving box 41, and a confluence trough 43 is provided between the inclined material discharge troughs 42 on the front and rear sides. A guide plate 44 is installed in the confluence trough 43, which is inclined from left to right and from bottom to top. A material receiving channel 45 is installed at the lowest point of the guide plate 44, and the output end of the material receiving channel 45 is set on the upper side of the qualified storage box 10.

[0041] In this embodiment, qualified welding powder flows out from the fine screening drum 39 and enters the material receiving box 41, and falls at the bottom of the material receiving box 41. The bottom of the material receiving box 41 is provided with an inclined discharge chute 42, so that the qualified welding powder flows into the confluence chute 43 under the guidance of the inclined discharge chute 42, and is finally transported to the material receiving channel 45 through the guide plate 44 in the confluence chute 43, and is output to the qualified storage box 10 through the material receiving channel 45 for storage.

[0042] Example 8, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1: the discharge tray 11 is provided with a discharge channel 46 at the output end of the discharge frame 38 , and the output end of the discharge channel 46 is arranged on the upper side of the unqualified storage box 12 .

[0043] In this embodiment, the returned powder output from the fine screening drum 39 enters the discharge tray 11 through the discharge frame 38, and falls into the discharge channel 46 from the discharge tray 11, and is guided through the discharge channel 46 to be output to the unqualified storage box 12 for storage.

[0044] Example 9, as Figure 4 As shown, this embodiment adds the following structure on the basis of embodiment 1, the installation component 13 includes an anti-movement seat 47 installed on the front and rear sides of the bottom of the box body 1, and a slide groove 48 is provided on the anti-movement seat 47. A slider 49 is slidably connected in the slide groove 48. The slider 49 is installed on both sides of the qualified storage box 10 and the unqualified storage box 12. A cover plate 50 is installed between the anti-movement seats 47 on both sides. The cover plate 50 is set on the top of the qualified storage box 10 and the unqualified storage box 12, and the bottom output ends of the receiving channel 45 and the discharging channel 46 are both installed through the cover plate 50.

[0045] In this embodiment, when installing the qualified storage box 10 and the unqualified storage box 12, it is only necessary to insert the sliders 49 on both sides of the qualified storage box 10 and the unqualified storage box 12 into the slide grooves 48 on the anti-movement seat 47, and push the qualified storage box 10 and the unqualified storage box 12 to slide into the box body 1. The anti-movement seat 47 fixes and limits the two sides of the qualified storage box 10 and the unqualified storage box 12 to prevent them from shaking during use and affecting the storage of welding powder. At the same time, the cover plate 50 is set on the surface of the qualified storage box 10 and the unqualified storage box 12 to prevent dust from entering.

[0046] Example 10, as Figure 6 As shown, this embodiment adds the following structure on the basis of embodiment 9: the cover plate 50 is provided with an assembly groove 51 on the upper side of the qualified storage box 10, the assembly groove 51 is provided with an assembly seat 52, the assembly seat 52 is provided with a drying box 53, the bottom of the drying box 53 is provided with a plurality of mesh holes 54, and a desiccant 55 is placed in the drying box 53.

[0047] In this embodiment, when storing qualified solder powder, the assembly seat 52 is installed in the assembly slot 51, and the drying box 53 is placed in the assembly seat 52, so that the desiccant 55 in the drying box 53 can reduce the moisture in the qualified storage box 10 through the mesh 54, thereby drying and storing the qualified solder powder for subsequent use.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A sieving and collecting device for tin-based spherical solder powder for SMT, characterized by: The invention comprises a box body (1), wherein an opening (2) is provided on one side of the top of the box body (1), a primary screening mechanism (3) is installed on the outer side of the opening (2) of the box body (1), an assembly frame (4) is installed in the box body (1), a driving motor (5) is installed on one side of the assembly frame (4), a power output end of the driving motor (5) is connected to a transmission component (6), the top of the transmission component (6) is matched with the primary screening mechanism (3), one side of the transmission component (6) is connected to a conveying mechanism (7), the conveying mechanism (7) is installed on the assembly frame (4) and is located on the lower side of the opening (2), the output end of the conveying mechanism (7) is connected to a fine screening mechanism (8), and the fine screening mechanism ( A material receiving assembly (9) is provided on the outer side of the box body (8), the output end of the material receiving assembly (9) is connected to a qualified storage box (10), the output end of the fine screening mechanism (8) is connected to a discharge tray (11), the output end of the discharge tray (11) is connected to an unqualified storage box (12), the qualified storage box (10) and the unqualified storage box (12) are both installed at the inner bottom of the box body (1), the outer sides of the qualified storage box (10) and the unqualified storage box (12) are installed with an installation assembly (13), the outer sides of the qualified storage box (10) and the unqualified storage box (12) are both provided with an air avoidance groove (14) on the outer sides of the qualified storage box (10) and the unqualified storage box (12), and the top outer side of the air avoidance groove (14) is hinged with a dustproof plate (15).

2. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 1, characterized in that: The primary screening mechanism (3) comprises side plates (16) installed on both sides of the outside of the opening (2), a plurality of guide sleeves (17) are evenly installed on the side plates (16), the guide sleeves (17) are slidably connected to a slide rod (18), the inner side of the slide rod (18) is connected to an L-shaped clamp seat (19), a plurality of springs (20) are installed between the L-shaped clamp seat (19) and the side plates (16), a primary screening frame (21) is installed between the L-shaped clamp seats (19) on both sides, a feeding port (22) with a trumpet-shaped structure is provided at the top of the primary screening frame (21), and a detachable primary screening plate (23) is installed at the bottom of the primary screening frame (21).

3. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 2, characterized in that: The transmission assembly (6) comprises a transmission rod (24) connected to the power output end of the driving motor (5), the top of the transmission rod (24) passes through the housing (1) and extends to the outside thereof, a bearing (25) is installed on the upper side of the transmission rod (24), and the bearing (25) is installed on the top surface of the housing (1), an eccentric cam (26) is installed on the top of the transmission rod (24), and the eccentric cam (26) contacts the outer side of the sliding rod (18), and a first bevel gear (27) is installed on the lower side of the transmission rod (24), the first bevel gear (27) is meshedly connected with a second bevel gear (28), and the second bevel gear (28) is connected with a linkage rod (29), and the linkage rod (29) is connected to the conveying mechanism (7).

4. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 3, characterized in that: The conveying mechanism (7) comprises a conveying box (30) mounted on an assembly frame (4), a conveying channel (31) being provided in the conveying box (30), a conveying rod (32) being installed in the conveying channel (31), one side of the conveying rod (32) being connected to a linkage rod (29), and the other side of the conveying rod (32) being connected to a fine screening mechanism (8), a spiral conveying blade (33) being installed on the outer side of the conveying rod (32), and a material discharge trough (34) being connected to the conveying channel (31) being provided at the top of the conveying box (30), and the material discharge trough (34) being arranged directly below the opening (2).

5. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 4, characterized in that: The fine screening mechanism (8) comprises a rotating rod (35) connected to the conveying rod (32), and rotating frames (36) are installed on the left and right sides of the rotating rod (35), wherein a feed frame (37) is installed on the outer side of the left rotating frame (36), and the feed frame (37) is rotatably arranged on the outer side of the output end of the conveying channel (31), and a discharge frame (38) is installed on the outer side of the right and left rotating frames (36), and the discharge frame (38) is rotatably arranged in the discharge tray (11), and a fine screening drum (39) is installed between the feed frame (37) and the discharge frame (38).

6. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 5, characterized in that: The conveying box (30) is provided with a guide frame (40) on the outer side of the output end of the conveying channel (31), and the guide frame (40) is arranged in the feeding frame (37).

7. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 6, characterized in that: The material receiving assembly (9) comprises a material receiving box (41) installed on the outside of the fine screening drum (39), and inclined material discharge troughs (42) are provided on the front and rear sides of the bottom of the material receiving box (41), and a confluence trough (43) is provided between the inclined material discharge troughs (42) on the front and rear sides, and a guide plate (44) is installed in the confluence trough (43) and is inclinedly arranged from left to right and from bottom to top, and a material receiving channel (45) is installed at the lowest point of the guide plate (44), and the output end of the material receiving channel (45) is arranged on the upper side of the qualified storage box (10).

8. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 7, characterized in that: The discharge tray (11) is provided with a discharge channel (46) at the output end of the discharge frame (38), and the output end of the discharge channel (46) is arranged on the upper side of the unqualified storage box (12).

9. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 8, characterized in that: The mounting assembly (13) comprises an anti-movement seat (47) mounted on the front and rear sides of the bottom of the box body (1); a slide groove (48) is provided on the anti-movement seat (47); a slider (49) is slidably connected in the slide groove (48); the slider (49) is mounted on both sides of the qualified storage box (10) and the unqualified storage box (12); a cover plate (50) is installed between the anti-movement seats (47) on both sides; the cover plate (50) is arranged on the top of the qualified storage box (10) and the unqualified storage box (12); and the bottom output ends of the receiving channel (45) and the discharging channel (46) are both installed through the cover plate (50).

10. The sieving and storing device for tin-based spherical solder powder for SMT according to claim 9, characterized in that: The cover plate (50) is provided with an assembly groove (51) on the upper side of the qualified storage box (10), an assembly seat (52) is installed in the assembly groove (51), a drying box (53) is installed in the assembly seat (52), a plurality of mesh holes (54) are provided at the bottom of the drying box (53), and a desiccant (55) is placed in the drying box (53).

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