Tin powder discharging device

Abstract

The utility model relates to the field of soldering paste preparation equipment, and discloses a tin powder discharging device which comprises a stirring barrel, a barrel cover, a powder screening funnel and a dispersing mechanism. The barrel cover covers the stirring barrel and comprises a feeding pipe; the powder screening funnel is connected with the feeding pipe; the dispersing mechanism comprises a material throwing disc, a lifting driving part and a rotating driving part, the material throwing disc is vertically arranged on the barrel cover in a sliding mode and provided with a containing groove, the lifting driving part and the rotating driving part are both arranged on the barrel cover, and the lifting driving part is in transmission connection with the material throwing disc and used for driving the material throwing disc to slide between a first position and a second position in a reciprocating mode; when the material throwing disc is at the first position, the notch of the containing groove is opposite to and communicated with the discharging end of the feeding pipe, when the material throwing disc is at the second position, the notch of the containing groove is communicated with the stirring barrel, and the rotary driving part is in transmission connection with the material throwing disc and used for driving the material throwing disc to rotate. The tin powder blanking device provided by the utility model can solve the problem of how to improve the mixing sufficiency and uniformity of tin powder and flux paste.

Description

Technical Field

[0001] The utility model relates to the field of solder paste preparation equipment, in particular to a tin powder feeding device. Background Art

[0002] Solder paste is a core material used in the soldering of electronic components. Its quality directly impacts the overall performance, reliability, and conductivity of electronic products. Solder paste is primarily composed of fine tin powder particles and flux paste, which are precisely mixed to form a paste with a certain viscosity and good thixotropic properties.

[0003] However, the preparation of solder paste faces a major challenge: tin powder particle agglomeration. Specifically, due to their extremely small particle size, typically reaching the micrometer or even nanometer level, this tiny size gives them a large specific surface area. This high specific surface area makes the tin powder particles extremely susceptible to microscopic forces such as electrostatic adsorption and van der Waals forces, causing them to aggregate and form agglomerates. This makes it difficult for the tin powder to be evenly dispersed and mixed fully and uniformly with the solder paste, thus affecting the quality of the solder paste.

[0004] Therefore, how to improve the tin powder agglomeration phenomenon during the solder paste preparation process and ensure that the tin powder and flux paste are fully and evenly mixed has become the key to improving the quality of solder paste and ensuring the reliability of electronic products. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a tin powder feeding device, which can at least solve the technical problem of how to improve the sufficiency and uniformity of mixing tin powder and solder paste.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a tin powder feeding device, comprising:

[0009] A mixing drum and a drum cover, wherein the drum cover is arranged on the mixing drum and includes a feed pipe;

[0010] A powder sieving funnel is connected to the feed end of the feed tube and is used to sieve tin powder;

[0011] The dispersion mechanism includes a material throwing tray, a lifting drive member, and a rotating drive member. The material throwing tray is vertically slidably arranged on the cylinder cover and is provided with a receiving groove for receiving tin powder. The sliding path of the material throwing tray includes a first position and a second position. The lifting drive member and the rotating drive member are both arranged on the cylinder cover. The lifting drive member is in transmission connection with the material throwing tray and is used to drive the material throwing tray to slide back and forth between the first position and the second position.

[0012] Wherein, when the material throwing disc is in the first position, the notch of the receiving groove is opposite to and communicated with the discharging end of the feeding pipe;

[0013] When the material throwing disc is in the second position, the notch of the receiving groove is communicated with the mixing drum. The rotation driving member is in transmission connection with the material throwing disc and is used for driving the material throwing disc to rotate.

[0014] Further, the sliding path of the aforesaid material throwing disc further includes a third position located between the first position and the second position. A sliding hole for slidably connecting the material throwing disc is provided at the bottom of the cylinder cover, and a relief opening communicated with the discharging end of the feeding pipe is provided on the inner wall of the sliding hole;

[0015] Wherein, when the material throwing disc is in the first position, the notch of the receiving groove is opposite to and communicated with the relief opening; when the material throwing disc is in the third position, the material throwing disc blocks the relief opening, and the hole wall of the sliding hole closes the notch of the receiving groove.

[0016] Further, the aforesaid powder screening funnel includes a funnel part and an ultrasonic vibrating screen. The ultrasonic vibrating screen is fixedly arranged at the upper end of the funnel part and is used for vibrating and screening the tin powder in the funnel part. The funnel part is connected to the feeding end of the feeding pipe.

[0017] Further, the aforesaid funnel part includes a discharging pipe. The discharging end of the discharging pipe is connected to the feeding end of the feeding pipe through a detachable structure. The detachable structure includes:

[0018] A first connecting part and a second connecting part, which are respectively arranged at the discharging end of the discharging pipe and the feeding end of the feeding pipe;

[0019] A screw rod and a nut. One end of the screw rod is connected to the first connecting part or the second connecting part, the other end penetrates through the second connecting part or the first connecting part, and is in threaded connection with the nut. The nut abuts against the second connecting part or the first connecting part to tightly connect the first connecting part and the second connecting part.

[0020] Further, U-shaped grooves are provided on the outer walls of the aforesaid first connecting part and the second connecting part. The U-shaped grooves of the first connecting part and the second connecting part are opposite in position. One end of the screw rod is rotatably connected in the U-shaped groove of the first connecting part or the second connecting part, and the other end turns into or out of the U-shaped groove of the second connecting part or the first connecting part.

[0021] Further, the aforesaid material throwing disc includes a rack and a turntable. The rack is slidably arranged vertically in the cylinder cover, and the turntable is rotatably connected to the bottom end of the rack around its own axis;

[0022] The lifting driving member includes a first motor. The first motor is installed in the cylinder cover, and a gear for meshing with the rack is provided at the output end of the first motor.

[0023] Further, the above-mentioned material throwing disc further includes a bevel gear part coaxially and fixedly arranged on the turntable, and the accommodating groove is annularly arranged on the turntable around the axial direction of the turntable;

[0024] The rotation driving member includes a second motor installed in the cylinder cover, and a bevel gear is provided at the output end of the second motor. Among them, when the material throwing disc is in the second position, the bevel gear part meshes with the bevel gear.

[0025] (III) Advantageous effects

[0026] Compared with the prior art, a tin powder feeding device provided by the present utility model has the following advantageous effects:

[0027] When the tin powder feeding device provided by the present utility model is used, first, tin powder is poured into the powder screening funnel, and the powder screening funnel screens and separates the tin powder, and the fine tin powder particles are input into the feed pipe. At this time, the original position of the material throwing disc is in the first position, and the feed pipe inputs the screened tin powder into the accommodating groove; then, the lifting driving member drives the material throwing disc to slide from the first position to the second position, moves the notch of the accommodating groove into the stirring cylinder, and makes the rotation driving member be in transmission connection with the material throwing disc; finally, the rotation driving member drives the material throwing disc to rotate, and the tin powder in the accommodating groove is evenly dispersed into the soldering paste in the stirring cylinder by the action of centrifugal force, so as to form solder paste by mixing tin powder and soldering paste subsequently. It can be seen that the tin powder feeding device screens and separates tin powder through the powder screening funnel, can effectively avoid tin powder aggregation and clumping and input into the feed pipe, and then evenly disperses the screened tin powder into the stirring cylinder through the dispersion mechanism, so that the tin powder can be more fully and evenly mixed with the soldering paste in the stirring cylinder, effectively improving the sufficiency and uniformity of the mixing of tin powder and soldering paste, thereby improving the quality of the solder paste and ensuring the reliability of electronic products. Description of the drawings

[0028] Figure 1 It is a three-dimensional view of the tin powder feeding device in the embodiment;

[0029] Figure 2 It is a sectional view of the material throwing disc of the tin powder feeding device in the first position in the embodiment;

[0030] Figure 3 It is a sectional view of the material throwing disc of the tin powder feeding device in the second position in the embodiment;

[0031] Figure 4 It is a sectional view of the material throwing disc of the tin powder feeding device in the third position in the embodiment;

[0032] Figure 5 It is for Figure 1 The enlarged schematic view at position A in;

[0033] Figure 6 It is a three-dimensional view of the cylinder cover and the powder screening funnel.

[0034] Reference numerals of the attached drawings:

[0035] 1. Mixing drum; 11. Mixing rod; 12. Mixing motor;

[0036] 2. Drum cover; 21. Feed pipe; 211. Groove; 22. Sliding connection hole; 23. Relief opening;

[0037] 3. Powder screening funnel; 31. Funnel part; 311. Discharge pipe; 312. Annular convex part; 32. Ultrasonic vibrating screen;

[0038] 4. Dispersion mechanism; 41. Throwing disc; 411. Accommodating groove; 412. Rack; 413. Turntable; 414. Bevel gear part; 42. Lifting driving part; 421. First motor; 422. Gear; 43. Rotating driving part; 431. Second motor; 432. Bevel gear;

[0039] 5. Detachable structure; 51. First connection part; 52. Second connection part; 53. Screw; 54. Nut; 55. U-shaped groove. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0041] The present utility model provides a tin powder feeding device for solving the problem of how to improve the sufficiency and uniformity of the mixing of tin powder and soldering paste.

[0042] Refer to Figure 1 、 Figure 2 and Figure 3 as shown, Figure 1 is a perspective view of the tin powder feeding device in the embodiment, Figure 2 is a cross-sectional view of the throwing disc of the tin powder feeding device in the first position in the embodiment, Figure 3 is a cross-sectional view of the throwing disc of the tin powder feeding device in the second position in the embodiment. The tin powder feeding device includes a mixing drum 1, a drum cover 2, a powder screening funnel 3 and a dispersion mechanism 4.

[0043] The drum cover 2 covers the mixing drum 1, and the drum cover 2 includes a feed pipe 21 for conveying tin powder.

[0044] The powder screening funnel 3 is connected to the feed end of the feed pipe 21. The powder screening funnel 3 is used for screening tin powder to screen out coarse tin powder or impurities and obtain fine tin powder particles.

[0045] The dispersing mechanism 4 includes a powder throwing disc 41, a lifting driving member 42 and a rotating driving member 43. The powder throwing disc 41 is slidably connected to the cylinder cover 2 in the vertical direction. The powder throwing disc 41 has a receiving groove 411 for receiving tin powder. The sliding path of the powder throwing disc 41 includes a first position and a second position. The lifting driving member 42 and the rotating driving member 43 are both installed on the cylinder cover 2. The lifting driving member 42 is in transmission connection with the powder throwing disc 41, and the lifting driving member 42 is used to drive the powder throwing disc 41 to reciprocally slide between the first position and the second position.

[0046] Wherein, when the powder throwing disc 41 is in the first position, the notch of the receiving groove 411 is opposite to and communicated with the discharging end of the feed pipe 21 to input the tin powder into the receiving groove 411. When the powder throwing disc 41 is in the second position, the notch of the receiving groove 411 is communicated with the mixing cylinder 1; the rotating driving member 43 is in transmission connection with the powder throwing disc 41, and the rotating driving member 43 is used to drive the powder throwing disc 41 to rotate.

[0047] When the tin powder feeding device with the above technical solution is used, first, pour the tin powder into the powder screening funnel 3. The powder screening funnel 3 screens and separates the tin powder, and inputs the fine tin powder particles into the feed pipe 21. At this time, the original position of the powder throwing disc 41 is at the first position, and the feed pipe 21 inputs the screened tin powder into the receiving groove 411 (the tin powder enters the receiving groove 411 along the Figure 2 arrow direction in the figure); then, the lifting driving member 42 drives the powder throwing disc 41 to slide from the first position to the second position, moves the notch of the receiving groove 411 into the mixing cylinder 1, and makes the rotating driving member 43 in transmission connection with the powder throwing disc 41; finally, the rotating driving member 43 drives the powder throwing disc 41 to rotate, and evenly disperses the tin powder in the receiving groove 411 into the solder paste in the mixing cylinder 1 through the action of centrifugal force (the tin powder in the receiving groove 411 is obliquely downward dispersed into the mixing cylinder 1 along the Figure 3 arrow direction in the figure), so as to form solder paste by subsequent mixing of the tin powder and the solder paste. It can be seen that the tin powder feeding device screens and separates the tin powder through the powder screening funnel 3, can effectively avoid the agglomeration of the tin powder and input it into the feed pipe 21, and then evenly disperses the screened tin powder into the mixing cylinder 1 through the dispersing mechanism 4, so that the tin powder can be more fully and evenly mixed with the solder paste in the mixing cylinder 1, effectively improving the sufficiency and uniformity of the mixing of the tin powder and the solder paste, thereby improving the quality of the solder paste and ensuring the reliability of electronic products.

[0048] The above powder screening funnel 3 can be detachably connected to the feeding end of the feed pipe 21, or can be fixedly connected by means of welding or integral connection. The above feed pipe 21 extends obliquely or vertically downward, so that the tin powder can be input into the cylinder cover 2 by the action of its own gravity.

[0049] A stirring motor 12 and a stirring rod 11 are installed on the above mixing cylinder 1 or the cylinder cover 2. Refer to Figure 2As shown in the figure, in this embodiment, the stirring motor 12 is installed on the stirring cylinder 1, the stirring rod 11 is rotatably connected inside the stirring cylinder 1, and the output end of the stirring motor 12 is welded to the stirring rod 11. In this way, when the stirring motor 12 is started, it can drive the stirring rod 11 to rotate, stirring and mixing the tin powder and the soldering paste in the stirring cylinder 1.

[0050] The above-mentioned lifting driving member 42 and rotating driving member 43 can be installed in the internal space of the cylinder cover 2 to play a dust-proof role.

[0051] Refer to Figure 2 、 Figure 3 and Figure 4 As shown in the figure, Figure 4 FIG. is a cross-sectional view of the material throwing disc of the tin powder feeding device in the third position in the embodiment. On the basis of the above embodiment, the sliding path of the material throwing disc 41 further includes a third position, which is located between the first position and the second position. The bottom of the cylinder cover 2 has a sliding hole 22 for slidably connecting the material throwing disc 41, and a relief opening 23 communicating with the discharge end of the feed pipe 21 is formed on the inner wall of the sliding hole 22. Among them, when the material throwing disc 41 is in the first position, the notch of the receiving groove 411 is opposite to and communicates with the relief opening 23; when the material throwing disc 41 is in the third position, the material throwing disc 41 blocks the relief opening 23, and the hole wall of the sliding hole 22 closes the notch of the receiving groove 411. In this way, during the process of the lifting driving member 42 driving the material throwing disc 41 to slide between the first position and the second position, it will pass through the third position. Among them, when the material throwing disc 41 slides from the first position to the third position, the material throwing disc 41 blocks the relief opening 23, cuts off the relief opening 23 and the receiving groove 411, and at the same time the hole wall of the sliding hole 22 closes the notch of the receiving groove 411, stopping the feed pipe 21 from continuing to input tin powder into the receiving groove 411, so that a certain amount of tin powder is maintained in the receiving groove 411. Then, the material throwing disc 41 continues to slide and moves from the third position to the second position, and the quantitative tin powder filled in the receiving groove 411 can be dispersed into the stirring cylinder 1 to achieve quantitative feeding.

[0052] Refer to Figure 1 and Figure 2As shown, in one embodiment of the powder screening funnel 3, the powder screening funnel 3 includes a funnel part 31 and an ultrasonic vibrating screen 32. The ultrasonic vibrating screen 32 is fixedly installed at the upper end of the funnel part 31 by means of integral connection or welding. The ultrasonic vibrating screen 32 is used for vibrating and screening the tin powder in the funnel part 31. The funnel part 31 is detachably or fixedly connected to the feeding end of the feeding pipe 21. In this way, the powder screening funnel 3 vibrates and screens to separate the tin powder through the ultrasonic vibrating screen 32, and then inputs the screened tin powder into the feeding pipe 21 through the funnel part 31. Among them, compared with other vibrating screens, the ultrasonic vibrating screen 32 has a better effect of screening and separating tin powder, and can more effectively avoid the agglomeration of tin powder; and while screening the tin powder, the ultrasonic vibrating screen 32 can also provide power for the transportation of the tin powder, assisting the tin powder to quickly and smoothly enter the receiving groove 411 along the feeding pipe 21.

[0053] Refer to Figure 1 , Figure 5 and Figure 6 shown, Figure 5 is Figure 1 the enlarged schematic view of part A in Figure 6 is the three-dimensional view of the cylinder cover and the powder screening funnel. On the basis of the above-mentioned funnel part 31, the funnel part 31 includes a discharge pipe 311. The discharge end of the discharge pipe 311 is connected to the feeding end of the feeding pipe 21 through a detachable structure 5. The detachable structure 5 includes a first connection part 51, a second connection part 52, a screw 53 and a nut 54. The first connection part 51 and the second connection part 52 are respectively integrally connected to the discharge end of the discharge pipe 311 and the feeding end of the feeding pipe 21. One end of the screw 53 is connected to the first connection part 51 or the second connection part 52, and the other end passes through the second connection part 52 or the first connection part 51 and is screwed with the nut 54. The nut 54 abuts against the second connection part 52 or the first connection part 51 to tightly connect the first connection part 51 and the second connection part 52. It can be seen that the tin powder feeding device can detachably connect the powder screening funnel 3 to the feeding pipe 21 of the cylinder cover 2 through the screw 53 and the nut 54, and this detachable connection method is simple and easy to operate, greatly facilitating subsequent maintenance or replacement of the powder screening funnel 3.

[0054] The above-mentioned nut 54 can use a standard nut 54, which can save production costs, or a self-made special-shaped nut 54, which can facilitate manual loosening or tightening.

[0055] The above-mentioned screw rod 53 can be slidably connected through the first connecting part 51 and the second connecting part 52, and the first connecting part 51 and the second connecting part 52 are fastened between the head of the screw rod 53 and the nut 54 by the nut 54 screwed at the tail end of the screw rod 53 or the nuts 54 screwed at both ends of the screw rod 53, or the first connecting part 51 and the second connecting part 52 are fastened between the two nuts 54. Alternatively, one end of the above-mentioned screw rod 53 can be rotatably connected to the first connecting part 51 or the second connecting part 52, the other end penetrates through the second connecting part 52 or the first connecting part 51, and is screwed with the nut 54, and the first connecting part 51 and the second connecting part 52 are fastened between the transfer end of the screw rod 53 and the nut 54.

[0056] Refer to Figure 5 and Figure 6 As shown, on the basis that the discharge end of the above-mentioned discharge pipe 311 and the feed end of the feed pipe 21 are connected by the detachable structure 5, U-shaped grooves 55 are provided on the outer walls of the first connecting part 51 and the second connecting part 52, and the U-shaped grooves 55 of the first connecting part 51 and the second connecting part 52 are opposite in position. One end of the screw rod 53 is rotatably connected to the U-shaped groove 55 of the first connecting part 51 or the second connecting part 52, and the other end is turned into or out of the U-shaped groove 55 of the second connecting part 52 or the first connecting part 51. In this way, one end of the screw rod 53 is rotatably connected to the U-shaped groove 55 of the first connecting part 51 or the second connecting part 52, which can effectively prevent the screw rod 53 from falling off and being lost, and the other end of the screw rod 53 is turned into the U-shaped groove 55 of the second connecting part 52 or the first connecting part 51, and then it can penetrate through the second connecting part 52 or the first connecting part 51 to realize the rapid positioning of the first connecting part 51 and the second connecting part 52, so as to quickly connect the discharge pipe 311 and the feed pipe 21.

[0057] Refer to Figure 2 As shown, on the basis that the discharge pipe 311 and the feed pipe 21 are connected by the detachable structure 5, the discharge end of the discharge pipe 311 and the feed end of the feed pipe 21 are respectively provided with an annular convex part 312 and a groove 211. The discharge end of the discharge pipe 311 and the feed end of the feed pipe 21 are butted through the annular convex part 312 and the groove 211, and the annular convex part 312 and the groove 211 are matched, which can effectively prevent the tin powder from leaking between the discharge pipe 311 and the feed pipe 21 during the use of the sieving funnel 3, resulting in waste.

[0058] Refer to Figure 2 、 Figure 3 and Figure 4As shown, in an embodiment where the lifting driving member 42 is in transmission connection with the material throwing disc 41, the material throwing disc 41 includes a rack 412 and a turntable 413. The rack 412 is slidably connected vertically in the cylinder cover 2, and the turntable 413 is rotatably connected about its own axis at the bottom end of the rack 412. The lifting driving member 42 includes a first motor 421. The first motor 421 is fixedly installed in the cylinder cover 2 by means of screwing or welding, etc. A gear 422 for meshing with the rack 412 is provided at the output end of the first motor 421 by means of welding or screwing, etc. It can be seen that when the first motor 421 is started, it can drive the gear 422 to rotate, thereby driving the rack 412 to move up and down. And the turntable 413 is axially fixed on the rack 412. Therefore, the rack 412 can drive the turntable 413 to move up and down accordingly, so as to realize the reciprocating up-and-down sliding of the material throwing disc 41 between the first position and the second position.

[0059] In this embodiment, the turntable 413 can slide vertically in the sliding hole 22 and can also rotate about its own axis in the sliding hole 22.

[0060] Refer to Figure 2 、 Figure 3 and Figure 4 As shown, in an embodiment where the rotating driving member 43 is in transmission connection with the material throwing disc 41, the material throwing disc 41 further includes a bevel gear portion 414. The bevel gear portion 414 is coaxially fixed on the turntable 413 by means of integral connection or welding, etc. The receiving groove 411 is annularly formed on the turntable 413 around the axis of the turntable 413. The rotating driving member 43 includes a second motor 431. The second motor 431 is fixedly installed in the cylinder cover 2 by means of screwing or welding, etc. A bevel gear 432 is provided at the output end of the second motor 431 by means of welding or screwing, etc. Among them, when the material throwing disc 41 is in the second position, the bevel gear portion 414 meshes with the bevel gear 432. In this way, when the second motor 431 is started, it can drive the bevel gear 432 to rotate, thereby driving the bevel gear portion 414 to rotate at a high speed around the axis of the turntable 413. The bevel gear portion 414 can drive the turntable 413 to rotate at a high speed around its own axis accordingly, so as to generate a large centrifugal force to uniformly disperse the tin powder in the receiving groove 411 into the mixing cylinder 1.

[0061] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tin powder feeding device, characterized in that, Comprising: A mixing drum and a drum cover, the drum cover being provided on the mixing drum and including a feed pipe; A powder screening funnel, connected to the feed end of the feed pipe and used for screening tin powder; A dispersion mechanism, including a material throwing disc, a lifting drive member and a rotation drive member, the material throwing disc being slidably provided on the drum cover in the vertical direction and having a receiving groove for receiving tin powder, the sliding path of the material throwing disc including a first position and a second position, both the lifting drive member and the rotation drive member being provided on the drum cover, the lifting drive member being in transmission connection with the material throwing disc and used for driving the material throwing disc to reciprocally slide between the first position and the second position; Wherein, when the material throwing disc is in the first position, the notch of the receiving groove is opposite to and communicated with the discharge end of the feed pipe; When the material throwing disc is in the second position, the notch of the receiving groove is communicated with the mixing drum, the rotation drive member being in transmission connection with the material throwing disc and used for driving the material throwing disc to rotate.

2. The tin powder feeding device according to claim 1, characterized in that, The sliding path of the material throwing disc further includes a third position, the third position being located between the first position and the second position, the bottom of the drum cover being provided with a sliding connection hole for slidably connecting the material throwing disc, and a relief opening communicated with the discharge end of the feed pipe being provided on the inner wall of the sliding connection hole; Wherein, when the material throwing disc is in the first position, the notch of the receiving groove is opposite to and communicated with the relief opening; when the material throwing disc is in the third position, the material throwing disc blocks the relief opening, and the hole wall of the sliding connection hole closes the notch of the receiving groove.

3. The tin powder feeding device according to claim 1 or 2, characterized in that The powder screening funnel includes a funnel part and an ultrasonic vibrating screen, the ultrasonic vibrating screen being fixedly provided at the upper end of the funnel part and used for vibrating and screening the tin powder in the funnel part, the funnel part being connected to the feed end of the feed pipe.

4. The tin powder feeding device according to claim 3, characterized in that, The funnel part includes a discharge pipe, the discharge end of the discharge pipe being connected to the feed end of the feed pipe through a detachable structure, the detachable structure including: A first connecting part and a second connecting part, respectively provided at the discharge end of the discharge pipe and the feed end of the feed pipe; A screw and a nut, one end of the screw being connected to the first connecting part or the second connecting part, the other end passing through the second connecting part or the first connecting part and being screwed with the nut, the nut being abutted against the second connecting part or the first connecting part to tightly connect the first connecting part and the second connecting part.

5. The tin powder feeding device according to claim 4, characterized in that, U-shaped grooves are provided on the outer walls of both the first connecting part and the second connecting part, the U-shaped grooves of the first connecting part and the second connecting part being opposite in position, one end of the screw being rotatably connected in the U-shaped groove of the first connecting part or the second connecting part, and the other end being turned into or out of the U-shaped groove of the second connecting part or the first connecting part.

6. A tin powder feeding device according to any one of claims 1, 2, 4, and 5, characterized in that The material throwing disc includes a rack and a turntable, the rack being slidably provided in the vertical direction in the drum cover, and the turntable being rotatably connected to the bottom end of the rack around its own axis; The lifting drive member includes a first motor, the first motor being installed in the drum cover, and a gear for meshing with the rack being provided at the output end of the first motor.

7. The tin powder feeding device according to claim 6, characterized in that, The material throwing disc further includes a bevel gear portion, the bevel gear portion is coaxially fixed on the turntable, and the receiving groove is annularly arranged on the turntable around the axial direction of the turntable; The rotary driving member includes a second motor, the second motor is installed in the cylinder cover, and a bevel gear is provided at the output end of the second motor. Wherein, when the material throwing disc is in the second position, the bevel gear portion meshes with the bevel gear.

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