Conveying device for SMD conductive silver adhesive production

Abstract

The invention relates to the technical field of conductive silver adhesives, and particularly discloses an SMD conductive silver adhesive production conveying device which comprises a base and a mounting plate mounted on the base, a heating tank is mounted on the mounting plate, a stirring assembly is mounted on the heating tank, a second mounting frame is mounted on the top face of the base, and a feeding pipe is mounted on the second mounting frame. A pressurizing assembly is cooperatively installed on the feeding pipe, a connecting pipe is communicated between the feeding pipe and the heating tank, first limiting assemblies are symmetrically and rotatably arranged on the outer wall of the connecting pipe, a conversion assembly is slidably installed on the connecting pipe, and a pneumatic assembly is installed between the conversion assembly and the base; when the device is used, the SMD conductive silver adhesive adhered to the inner wall of the connecting pipe is quickly scraped into a heating tank or a feeding pipe through mutual cooperation of the structures, so that the effects of reducing the downtime of the device, improving the production efficiency and reducing the maintenance workload are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of conductive silver paste, and in particular relates to a conveying device for producing SMD conductive silver paste. Background Art

[0002] The production process of SMD conductive silver paste involves multiple complex process steps, including mixing, stirring, coating and curing of raw materials. Among them, the conveying device is an important link connecting various production links, and its performance directly affects production efficiency, product quality and production cost.

[0003] The patent with authorization announcement number CN213324837U discloses a conveying device for the production of conductive silver glue, in which the rotation of the motor can cause the rotating shaft to drive the stirring paddle to rotate, so that the stirring paddle can stir the conductive silver glue in the storage tank, thereby preventing the conductive silver glue from solidifying due to standing still. A coil is wound inside the heating layer, and the coil inside the heating layer is energized to generate heat, which can heat the conductive silver glue in the storage tank, which can prevent the conductive silver glue from solidifying due to cooling and causing blockage of the equipment.

[0004] However, in the prior art, a discharge pipe is connected to the storage tank. This structure serves as a connector between the storage tank and the feed pipe. The discharge pipe has a small diameter, which makes it difficult to remove the SMD conductive silver paste adhered to the inner wall of the device when it is cleaned after use. Specifically, due to the small diameter of the discharge pipe, a thicker coating is easily formed on the inner wall of the pipe during the flow of the silver paste. When cleaning is performed after production is completed, the SMD silver paste adhered to the pipe wall is difficult to be completely cleaned off. As time accumulates, the residual silver paste will gradually dry and solidify, further increasing the difficulty of cleaning, thereby extending the downtime of the equipment, reducing production efficiency, and increasing the cost and workload of equipment maintenance. Summary of the invention

[0005] The purpose of the present invention is to provide a conveying device for the production of SMD conductive silver paste, so as to solve the problem that a discharge pipe is connected to a storage tank in the prior art. This structure serves as a connecting piece between the storage tank and the feeding pipe. The diameter of the discharge pipe is small, which makes it difficult to remove the SMD conductive silver paste adhered to the inner wall of the device when cleaning it after use, thereby extending the downtime of the equipment, reducing production efficiency, and increasing the cost and workload of equipment maintenance.

[0006] To achieve the above object, the present invention provides the following technical solutions: The conveying device for producing SMD conductive silver paste comprises a base and a mounting plate mounted on the base, a heating tank is mounted on the mounting plate, a stirring component is mounted on the heating tank, a mounting frame 2 is mounted on the top surface of the base, a feeding pipe is mounted on the mounting frame 2, a pressurizing component is mounted on the feeding pipe, a connecting pipe is connected between the feeding pipe and the heating tank, a limiting component 1 is symmetrically rotated on the outer wall of the connecting pipe, a conversion component is slidably mounted on the connecting pipe, and a pneumatic component is mounted between the conversion component and the base; The pneumatic assembly includes an electric vacuum pump, the electric vacuum pump is installed on the top surface of the base, a connecting cylinder is installed on the side of the top surface of the base close to the electric vacuum pump, a moving cylinder is slidably installed in the connecting cylinder, and the air pipe on the electric vacuum pump is connected to the connecting cylinder; The conversion assembly includes a mounting tube, a mounting tube is slidably mounted in the connecting tube, a connecting plate is mounted below the inner cavity of the mounting tube, through holes are symmetrically opened on the side wall of the mounting tube, arc frames are symmetrically mounted in the inner walls of the two through holes, and a limiting assembly 2 is mounted between the four arc frames; A scraper is clamped in the through hole, a connecting pipe is installed in the inner cavity of the installation pipe, the connecting pipe penetrates the inner wall of the installation pipe and is connected to the outside of the installation pipe, and a solenoid valve is arranged on the connecting pipe.

[0007] Preferably: a mounting frame 1 is installed on the top surface of the connecting disk, a spring 1 is installed on the bottom surface of the inner cavity of the mounting frame 1, a closing plate is installed on the end of the spring 1 away from the mounting frame 1, and a closing plate is slidably installed in the moving cylinder.

[0008] Preferably: the second limiting component comprises a mounting frame, and the mounting frame is connected to the arc frame; A spring three is installed on the inner cavity side wall of the installation frame, and a limit block is installed at one end of the spring three away from the inner cavity of the installation frame. The bottom surface of the limit block is arc-shaped, and the curvature of the bottom surface of the limit block is the same as the curvature of the inner cavity of the connecting pipe; The installation frame is slidably arranged between the two arc-shaped frames.

[0009] Preferably: a sliding groove is provided on the bottom surface of the limit block, a sliding plate is slidably arranged in the sliding groove, a limiting groove is provided in the middle of the bottom surface of the installation frame, the sliding plate is slidably arranged inside the limiting groove, a connecting frame is installed under the side wall of the sliding plate, the connecting frame is "L" shaped, and a top support plate is installed on the side wall of the connecting frame, and the top support plate is in contact with the top surface of the connecting plate.

[0010] Preferably: a partition plate is installed in the middle of the inner cavity of the installation tube, and the partition plate is located between the connecting tube and the arc frame.

[0011] Preferably: the first limiting assembly comprises a rotating ring, a sliding hole is vertically opened on the side wall of the connecting pipe, and the mounting pipe is slidably mounted in the inner cavity of the sliding hole; The outer wall of the connecting tube is located on both sides of the sliding hole and is rotatably installed with a rotating ring, a fixed cylinder is installed on the side wall of the rotating ring, a spring 2 is installed on the side wall of the inner cavity of the fixed cylinder, a limiting ring 1 is installed at the end of the spring 2 away from the fixed cylinder, a plug-in rod is installed in the inner cavity of the limiting ring 1, the plug-in rod and the fixed cylinder slide with each other, and limiting rings 3 are installed on both sides of the inner cavity of the connecting tube.

[0012] Preferably: a second limiting ring is installed below the outer wall of the installation tube, a plug hole is symmetrically opened on the top surface of the second limiting ring, the fixed tube is plugged into the inner cavity of the plug hole, and the bottom surface of the rotating ring contacts the top surface of the second limiting ring.

[0013] Preferably, the stirring assembly comprises a motor, the top surface of the heating tank is equipped with the motor, the output shaft of the motor passes through the top of the heating tank and extends to the inner cavity of the heating tank, and the power output shaft of the motor is connected with a stirring paddle; A feed pipe is installed on the side wall of the heating tank, and a water inlet pipe is installed on the top surface of the heating tank.

[0014] Preferably: the pressurizing assembly includes a hydraulic telescopic rod, the top surface of the feeding tube is installed with the hydraulic telescopic rod, the telescopic shaft of the hydraulic telescopic rod passes through the top of the feeding tube and extends to the inner cavity of the feeding tube, the end of the telescopic shaft of the hydraulic telescopic rod is connected to a pressurizing block, the side wall of the pressurizing block is in close contact with the inner wall of the feeding tube, and a plurality of discharge pipes are evenly distributed on the bottom surface of the feeding tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a pneumatic component, a conversion component and a limit component. When the device is in use, the above structures cooperate with each other to quickly scrape the SMD conductive silver glue adhering to the inner wall of the connecting tube into the heating tank or the feeding tube when the device is used. This reduces the downtime of the device, improves production efficiency and reduces maintenance workload.

[0016] 2. The present invention sets a pneumatic component, a conversion component and a limit component 1. When the device is in use, the above structures cooperate with each other to achieve that after the positions of the connecting pipe and the scraper are switched, when the scraper reaches the specified position, the limit block moves between the connecting pipe, the through hole and the mounting frame under the action of the spring 3, so that when the scraper is not retracted, the mounting pipe as a whole will not move downward, thereby achieving the purpose of improving the stability of the device.

[0017] 3. The present invention sets a pneumatic component, a conversion component and a limit component. When the device is in use, the above structures cooperate with each other to facilitate the blocking of both ends of the connecting pipe when the solenoid valve is damaged. This solves the problem in the prior art that when the valve is damaged, the flow of the SMD conductive silver glue between the storage tank and the feeding pipe cannot be controlled, thereby avoiding continuous leakage and disordered flow of the silver glue. At the same time, adjustments can be made in a short time before continuing production.

[0018] 4. The present invention provides a limit assembly 1, a limit ring 2 and a plug-in hole. When the device is in use, the above structures cooperate with each other to achieve the effect of facilitating the replacement of worn scrapers, further improving the maintenance efficiency of the device, and the effect of scraping the SMD conductive silver glue on the inner wall of the connecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall stereogram of the present invention; Figure 2 It is a front view of the present invention; Figure 3 This is a schematic diagram of the connecting pipe structure of the present invention; Figure 4 It is a cross-sectional view of a limiting component of the present invention; Figure 5 for Figure 4 The structure diagram at A is enlarged; Figure 6 It is a cross-sectional view of the separation structure of the conversion component and the pneumatic component of the present invention; Figure 7 It is a schematic diagram of the structure of the pneumatic component of the present invention; Figure 8 It is a cross-sectional view of the pneumatic component of the present invention; Fig. 9 This is a schematic diagram of the installation of a spring of the present invention; Fig.10 It is a cross-sectional view of the second position limiting assembly of the present invention; Fig.11 It is a front cross-sectional view of the present invention.

[0020] In the figure: 1, base; 2, mounting plate; 3, heating tank; 4, connecting pipe; 5, pneumatic assembly; 501, electric vacuum pump; 502, connecting cylinder; 503, moving cylinder; 504, connecting plate; 505, mounting frame 1; 506, spring 1; 507, closing plate; 6, conversion assembly; 601, mounting pipe; 602, connecting pipe; 603, solenoid valve; 604, through hole; 605, arc frame; 606, scraper; 607, partition plate; 7, feeding pipe; 8, control panel; 9, limit assembly 1; 901, rotating ring; 902, fixed cylinder; 903, plug rod ;904, spring two;905, limit ring one;10, sliding hole;12, limit ring two;13, plug hole;14, limit assembly two;141, mounting frame;142, sliding plate;143, connecting frame;144, spring three;145, slide groove;146, top support plate;147, limit groove;148, limit block;15, stirring assembly;151, motor;152, stirring paddle;16, feed pipe;17, water inlet pipe;18, pressurizing assembly;181, hydraulic telescopic rod;182, pressurizing block;19, mounting frame two;20, discharge pipe;21, limit ring three. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Reference Figure 1-Figure 11 As shown, the present invention provides a conveying device for SMD conductive silver paste production, including a base 1 and a mounting plate 2 mounted on the base 1, a heating tank 3 is mounted on the mounting plate 2, and the heating tank 3 is a structure combining a storage tank and a heating layer in the authorization announcement number CN213324837U, and the working principle is the same, which will not be described in detail here; a stirring component 15 is mounted on the heating tank 3, a mounting frame 19 is mounted on the top surface of the base 1, a feeding pipe 7 is mounted on the mounting frame 19, a pressurizing component 18 is mounted on the feeding pipe 7, a connecting pipe 4 is connected between the feeding pipe 7 and the heating tank 3, a limited position component 9 is symmetrically rotated on the outer wall of the connecting pipe 4, a conversion component 6 is slidably mounted on the connecting pipe 4, and a pneumatic component 5 is installed between the conversion component 6 and the base 1; A control panel 8 is installed on the side wall of the installation plate 2. The control panel 8 is electrically connected to all electrical devices in the device and controls the operation of the electrical devices. The pneumatic assembly 5 includes an electric vacuum pump 501, the electric vacuum pump 501 is installed on the top surface of the base 1, a connecting cylinder 502 is installed on the side of the top surface of the base 1 close to the electric vacuum pump 501, a moving cylinder 503 is slidably installed in the connecting cylinder 502, and the air pipe on the electric vacuum pump 501 is connected to the connecting cylinder 502; The electric vacuum pump 501 drives the pump shaft and the impeller to rotate through the motor to form a negative pressure area, thereby sucking gas. By controlling the motor direction and the valve state, the reverse flow of gas (i.e., inflation) can also be achieved. The electric vacuum pump 501 is common knowledge known to people in the art and will not be described in detail here. The conversion assembly 6 includes a mounting tube 601, the mounting tube 601 is slidably mounted in the connecting tube 4, a connecting plate 504 is mounted below the inner cavity of the mounting tube 601, through holes 604 are symmetrically opened on the side wall of the mounting tube 601, arc frames 605 are symmetrically mounted in the inner walls of the two through holes 604, and a limiting assembly 14 is mounted between the four arc frames 605; A scraper 606 is clamped in the through hole 604, a connecting pipe 602 is installed in the inner cavity of the installation tube 601, the connecting pipe 602 penetrates the inner wall of the installation tube 601 and is connected to the outside of the installation tube 601, and a solenoid valve 603 is arranged on the connecting pipe 602, and the solenoid valve 603 controls whether the SMD conductive silver glue can pass through the connecting pipe 602; Limiting rings 3 21 are respectively installed on both sides of the inner cavity of the connecting pipe 4 , and the limiting rings 3 21 limit the moving distance of the scraper 606 to prevent the scraper 606 from detaching from the inner wall of the connecting pipe 4 .

[0023] In a further embodiment, a mounting frame 505 is installed on the top surface of the connection disk 504, a spring 506 is installed on the bottom surface of the inner cavity of the mounting frame 505, a closing plate 507 is installed on the end of the spring 506 away from the mounting frame 505, and the closing plate 507 is slidably installed in the moving cylinder 503; The limiting component 1 9 includes a rotating ring 901, a sliding hole 10 is vertically opened on the side wall of the connecting pipe 4, and the mounting pipe 601 is slidably mounted in the inner cavity of the sliding hole 10; The outer wall of the connecting tube 4 is located on both sides of the sliding hole 10 and is rotatably mounted with a rotating ring 901, a fixed cylinder 902 is mounted on the side wall of the rotating ring 901, a spring 2 904 is mounted on the inner cavity side wall of the fixed cylinder 902, a limit ring 1 905 is mounted on the end of the spring 2 904 away from the fixed cylinder 902, a plug-in rod 903 is mounted in the inner cavity of the limit ring 1 905, and the plug-in rod 903 and the fixed cylinder 902 slide with each other; The fixing cylinder 902 and the outer wall of the scraper 606 clamped in the through hole 604 are in contact with each other, so as to limit the position of the scraper 606; A limit ring 12 is installed below the outer wall of the mounting tube 601 , and a plug hole 13 is symmetrically opened on the top surface of the limit ring 12 . The fixed tube 902 is plugged into the inner cavity of the plug hole 13 , and the bottom surface of the rotating ring 901 contacts the top surface of the limit ring 12 .

[0024] Among them, the closing plate 507 closes the movable cylinder 503 under normal conditions. When the electric vacuum pump 501 inflates the connecting cylinder 502 and the movable cylinder 503, the pressure is adjusted to allow the mounting tube 601 and the movable cylinder 503 to move up and down. Under the action of the spring 506, the closing plate 507 of the movable cylinder 503 will not separate from the inner cavity of the movable cylinder 503. Therefore, when the connecting tube 602 corresponds to the connecting tube 4, the plug-in rod 903 can be pressed upward to remove the plug-in rod 903 from the plug-in hole 13, and the rotating ring 901 and the fixed cylinder 902 can be flipped over to release the limit on the scraper 606, thereby facilitating the replacement of the scraper 606, thereby achieving the effect of facilitating the replacement of the worn scraper 606, further improving the maintenance efficiency of the device, and the effect of scraping the SMD conductive silver glue on the inner wall of the connecting tube 4.

[0025] In a further embodiment, the second limiting assembly 14 includes a mounting frame 141, and the mounting frame 141 is connected to the arc frame 605; A spring 3 144 is installed on the inner cavity side wall of the installation frame 141, and a limit block 148 is installed on one end of the spring 3 144 away from the inner cavity of the installation frame 141. The bottom surface of the limit block 148 is arc-shaped, and the curvature of the bottom surface of the limit block 148 is the same as the curvature of the inner cavity of the connecting pipe 4; The mounting frame 141 is slidably disposed between the two arc-shaped frames 605; A slide groove 145 is provided on the bottom surface of the limit block 148, a slide plate 142 is slidably provided in the slide groove 145, a limit groove 147 is provided in the middle of the bottom surface of the installation frame 141, the slide plate 142 is slidably provided inside the limit groove 147, a connecting frame 143 is installed below the side wall of the slide plate 142, the connecting frame 143 is "L" shaped, a top support plate 146 is installed on the side wall of the connecting frame 143, and the top support plate 146 is in contact with the top surface of the connecting plate 504; A partition plate 607 is installed in the middle of the inner cavity of the installation tube 601, and the partition plate 607 is located between the connecting tube 602 and the arc frame 605; Among them, after the scraper 606 scrapes the inner wall of the connecting tube 4, the gas in the connecting tube 502, the moving tube 503 and the installation tube 601 is discharged to the outside through the electric vacuum pump 501 to reduce the air pressure therein, and then the scraper 606 moves in the direction. At this time, in order to prevent the conversion component 6 from falling, the limit block 148 is located between the connecting tube 4, the through hole 604 and the installation frame 141 to prevent the conversion component 6 from falling as a whole before the scraper 606 is received in the through hole 604. When the limit block 148 is initially separated from the connecting tube 4, the scraper 606 will be located between the connecting tube 4 and the through hole 604, thereby further avoiding the problem of the conversion component 6 falling as a whole before the scraper 606 is received in the through hole 604.

[0026] In a further embodiment, the stirring assembly 15 includes a motor 151, and the motor 151 is installed on the top surface of the heating tank 3. The output shaft of the motor 151 passes through the top of the heating tank 3 and extends to the inner cavity of the heating tank 3. The power output shaft of the motor 151 is connected to a stirring paddle 152; A feed pipe 16 is installed on the side wall of the heating tank 3, and a water inlet pipe 17 is installed on the top surface of the heating tank 3; the pressurizing assembly 18 includes a hydraulic telescopic rod 181, and the top surface of the feeding pipe 7 is installed with the hydraulic telescopic rod 181, and the telescopic shaft of the hydraulic telescopic rod 181 passes through the top of the feeding pipe 7 and extends to the inner cavity of the feeding pipe 7, and the end of the telescopic shaft of the hydraulic telescopic rod 181 is connected to a pressurizing block 182, and the side wall of the pressurizing block 182 is in close contact with the inner wall of the feeding pipe 7, and a plurality of discharge pipes 20 are evenly distributed on the bottom surface of the feeding pipe 7; When the device is in use, the SMD conductive silver glue enters the feeding pipe 7 through the heating tank 3, the connecting pipe 4 and the connecting pipe 602, and finally the hydraulic telescopic rod 181 pushes the pressure block 182 to pressurize the SMD conductive silver glue in the feeding pipe 7, and finally squeezes it out from the discharge pipe 20.

[0027] Working principle: When the device is used, firstly, all electrical devices in the device are powered on, and SMD conductive silver glue is injected into the heating tank 3 through the feeding pipe 16, the heating tank 3 heats the SMD conductive silver glue therein, and the motor 151 is started to drive the stirring paddle 152 to stir the SMD conductive silver glue in the heating tank 3; When the device is working normally, the connecting pipe 602 and the connecting pipe 4 are connected to each other, and the solenoid valve 603 controls the flow of the SMD conductive silver glue between the heating tank 3 and the feeding pipe 7; After the device is used, the solenoid valve 603 is opened to discharge the SMD conductive silver glue in the heating tank 3, the connecting tube 4 and the feeding tube 7 as much as possible, and then the electric vacuum pump 501 is started to add gas and pressurize the connecting tube 502, and then the moving tube 503 will move upward. When the moving tube 503 moves upward, the connecting plate 504 on the side wall of the moving tube 503 will drive the conversion component 6 as a whole and the limiting ring 12 to move upward. With the upward movement of the installation tube 601 and the limiting ring 12, when the top surface of the limiting ring 12 contacts the bottom surface of the rotating ring 901, the scraper 606 will be aligned with the inner cavity of the connecting tube 4; At the same time, the electric vacuum pump 501 continues to pressurize the connecting cylinder 502. As the air pressure in the connecting cylinder 502 is pressurized, the closing plate 507 overcomes the elastic force of the spring 1 506 under the action of the high-pressure gas in the connecting cylinder 502 and the moving cylinder 503, and moves upward, thereby connecting the connecting cylinder 502, the moving cylinder 503 and the installation tube 601 to each other. At this time, when the scraper 606 is aligned with the connecting pipe 4, under the action of the spring 3 144, the limit block 148 will push the scraper 606 to move until the limit block 148 is simultaneously located between the connecting pipe 4, the through hole 604 and the mounting frame 141; After the limit block 148 moves a certain distance, the side wall of the slide groove 145 will contact the sliding plate 142, and drive the connecting frame 143 and the supporting plate 146 to move and be inserted between the closing plate 507 and the moving cylinder 503; Then the electric vacuum pump 501 is continuously inflated and pressurized, and then the air pressure in the connecting tube 502, the moving tube 503 and the installation tube 601 increases, which will push the scraper 606 to move. When the scraper 606 moves, it will scrape the SMD conductive silver glue on the inner wall of the connecting tube 4 and push the SMD conductive silver glue into the heating tank 3 or the feeding tube 7, so as to facilitate the cleaning of the SMD conductive silver glue attached to the connecting tube 4; After scraping, the gas in the connecting cylinder 502, the moving cylinder 503 and the installation tube 601 is discharged outward by the electric vacuum pump 501 to reduce the air pressure therein, and then the scraper 606 moves in the direction to reset. When the scraper 606 resets, the scraper 606 gradually presses the limit block 148 into the installation frame 141, and the inner wall of the slide groove 145 on the limit block 148 will synchronously push the connecting frame 143 to move. When the scraper 606 is completely reset, the connecting frame 143 moves out from between the closing plate 507 and the moving cylinder 503, so that the closing plate 507 will be reset under the action of the spring 1 506; As the electric vacuum pump 501 continues to extract the air in the electric vacuum pump 501 and the limiting component 14 does not limit the position between the installation pipe 601 and the connecting pipe 4, the conversion component 6 as a whole descends under the drive of the moving cylinder 503 until the connecting pipe 602 corresponds to the connecting pipe 4.

[0028] According to the explanation and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A conveying device for producing SMD conductive silver paste, comprising a base (1) and a mounting plate (2) mounted on the base (1), characterized in that: The mounting plate (2) is mounted with a heating tank (3), a stirring assembly (15) is mounted on the heating tank (3), a mounting frame (2) (19) is mounted on the top surface of the base (1), a feed pipe (7) is mounted on the mounting frame (19), a pressurizing assembly (18) is mounted on the feed pipe (7), a connecting pipe (4) is connected between the feed pipe (7) and the heating tank (3), a limit assembly (9) is symmetrically rotatably arranged on the outer wall of the connecting pipe (4), a conversion assembly (6) is slidably mounted on the connecting pipe (4), and a pneumatic assembly (5) is mounted between the conversion assembly (6) and the base (1); The pneumatic assembly (5) comprises an electric vacuum pump (501), the electric vacuum pump (501) being mounted on the top surface of the base (1), a connecting cylinder (502) being mounted on a side of the top surface of the base (1) close to the electric vacuum pump (501), a moving cylinder (503) being slidably mounted in the connecting cylinder (502), and an air pipe on the electric vacuum pump (501) being connected to the connecting cylinder (502); The conversion assembly (6) comprises a mounting tube (601), the mounting tube (601) being slidably mounted in the connecting tube (4), a connecting plate (504) being mounted below the inner cavity of the mounting tube (601), through holes (604) being symmetrically opened on the side wall of the mounting tube (601), arc-shaped frames (605) being symmetrically mounted in the inner walls of the two through holes (604), and a second limit assembly (14) being mounted between the four arc-shaped frames (605); A scraper (606) is clamped in the through hole (604), a connecting pipe (602) is installed in the inner cavity of the mounting pipe (601), the connecting pipe (602) penetrates the inner wall of the mounting pipe (601) and is connected to the outside of the mounting pipe (601), and a solenoid valve (603) is arranged on the connecting pipe (602).

2. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: A mounting frame 1 (505) is installed on the top surface of the connecting disk (504), a spring 1 (506) is installed on the bottom surface of the inner cavity of the mounting frame 1 (505), a closing plate (507) is installed at one end of the spring 1 (506) away from the mounting frame 1 (505), and a closing plate (507) is slidably installed in the moving cylinder (503).

3. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: The second limiting assembly (14) comprises a mounting frame (141), and the mounting frame (141) is connected to the arc frame (605); A spring three (144) is installed on the inner cavity side wall of the installation frame (141); a limit block (148) is installed at one end of the spring three (144) away from the inner cavity of the installation frame (141); the bottom surface of the limit block (148) is arc-shaped, and the curvature of the bottom surface of the limit block (148) is the same as the curvature of the inner cavity of the connecting pipe (4); The installation frame (141) is slidably disposed between the two arc-shaped frames (605).

4. The conveying device for producing SMD conductive silver paste according to claim 3, characterized in that: The bottom surface of the limit block (148) is provided with a slide groove (145), a slide plate (142) is slidably arranged in the slide groove (145), a limit groove (147) is provided in the middle of the bottom surface of the installation frame (141), the slide plate (142) is slidably arranged inside the limit groove (147), a connecting frame (143) is installed below the side wall of the sliding plate (142), the connecting frame (143) is in an "L" shape, a top support plate (146) is installed on the side wall of the connecting frame (143), and the top support plate (146) is in contact with the top surface of the connecting plate (504).

5. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: A partition plate (607) is installed in the middle of the inner cavity of the installation tube (601), and the partition plate (607) is located between the connecting tube (602) and the arc-shaped frame (605).

6. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: The first limiting component (9) comprises a rotating ring (901), a sliding hole (10) is vertically opened on the side wall of the connecting tube (4), and the mounting tube (601) is slidably mounted in the inner cavity of the sliding hole (10); The outer wall of the connecting tube (4) is located on both sides of the sliding hole (10) and is rotatably mounted with a rotating ring (901); a fixed cylinder (902) is mounted on the side wall of the rotating ring (901); a spring 2 (904) is mounted on the side wall of the inner cavity of the fixed cylinder (902); a limit ring 1 (905) is mounted on the end of the spring 2 (904) away from the fixed cylinder (902); a plug-in rod (903) is mounted in the inner cavity of the limit ring 1 (905); the plug-in rod (903) and the fixed cylinder (902) slide with each other; and limit rings 3 (21) are mounted on both sides of the inner cavity of the connecting tube (4).

7. The conveying device for producing SMD conductive silver paste according to claim 6, characterized in that: A second limiting ring (12) is installed below the outer wall of the installation tube (601), and a plug hole (13) is symmetrically opened on the top surface of the second limiting ring (12). The fixed cylinder (902) is plugged into the inner cavity of the plug hole (13), and the bottom surface of the rotating ring (901) contacts the top surface of the second limiting ring (12).

8. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: The stirring assembly (15) comprises a motor (151), the motor (151) is mounted on the top surface of the heating tank (3), the output shaft of the motor (151) passes through the top of the heating tank (3) and extends to the inner cavity of the heating tank (3), and the power output shaft of the motor (151) is connected to a stirring paddle (152); A feed pipe (16) is installed on the side wall of the heating tank (3), and a water inlet pipe (17) is installed on the top surface of the heating tank (3).

9. The conveying device for producing SMD conductive silver paste according to claim 1, characterized in that: The pressurizing assembly (18) comprises a hydraulic telescopic rod (181), the top surface of the feeding tube (7) being mounted with the hydraulic telescopic rod (181), the telescopic shaft of the hydraulic telescopic rod (181) passing through the top of the feeding tube (7) and extending to the inner cavity of the feeding tube (7), the end of the telescopic shaft of the hydraulic telescopic rod (181) being connected with a pressurizing block (182), the side wall of the pressurizing block (182) being in close contact with the inner wall of the feeding tube (7), and a plurality of discharge pipes (20) being evenly distributed on the bottom surface of the feeding tube (7).

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