Pressureless sintering silver paste production and processing equipment

Abstract

The invention discloses pressureless sintering silver paste production and processing equipment, relates to the field of liquid precious metal processing, and solves the problem that when the existing pressureless sintering silver paste production and processing equipment carries out ball milling and stirring on silver paste, the silver paste is easy to adhere to the surface of a sphere and is difficult to output sufficiently, so that a part of products are wasted. Comprising a machine body, a tank body, a ball milling mechanism, an output mechanism and a scraping mechanism, the ball milling mechanism comprises a rotating cylinder and a plurality of groups of balls, the output mechanism comprises an output frame, an output groove is formed in the rotating cylinder, the scraping mechanism comprises elastic cloth, and a plurality of groups of elastic holes are uniformly formed in the elastic cloth. The communicating state between the output groove and the output frame is opened through the output mechanism, the silver paste is output downwards from the output frame, the elastic cloth is rotated to the position below the ball through the scraping mechanism, the ball is pushed to penetrate through the elastic hole to be output, and the silver paste on the surface of the ball is scraped and collected through the elastic hole.

Description

Technical Field

[0001] The invention relates to the technical field of liquid precious metal processing, in particular to a pressureless sintering silver paste production and processing equipment. Background Art

[0002] Pressureless sintering silver paste is a new type of interconnect material used in the field of electronic packaging. It is mainly composed of micro-nano silver particles, organic carriers and additives. It can be sintered at low temperatures (usually 150-250°C) without external pressure to form a dense silver layer with high electrical and thermal conductivity. Its core principle is to achieve metallurgical bonding between particles through spontaneous diffusion and necking growth driven by the surface energy of silver particles.

[0003] In order to improve the thermomechanical fatigue properties of pressureless sintering silver paste and realize the self-repair of microcracks in pressureless sintering silver paste, some manufacturers have developed liquid metal microcapsule modified self-repairing pressureless sintering silver paste. The silver paste contains a certain amount of liquid metal microcapsule powder, and the carboxyl polyurethane of the outer shell has excellent thermoelastic properties. The liquid metal inside can also fill the microcracks between the packaging interface after the microcapsule is broken, and has a self-repairing function, which can significantly improve the service life of the pressureless sintering silver paste. Among them, an important step is to mix and ball-mill the liquid metal microcapsules produced with the required silver powder, organic solvent, dispersant, rheological agent, defoaming agent and other component raw materials. After the grinding is completed, a large amount of silver paste will adhere to the surface of the internal sphere of the existing processing equipment. At present, these silver pastes generally need to be manually mechanically removed or solvent dissolved, and the mechanical removal efficiency is relatively low. Solvent removal will cause the characteristics of these silver pastes to change, and it is difficult to use them directly after separating the solvent, resulting in a part of the silver paste product Waste. Summary of the invention

[0004] The purpose of the present invention is to provide a pressureless sintering silver paste production and processing equipment that is convenient for improving the silver paste ball milling efficiency while reducing the waste caused by the silver paste adhering to the surface of the sphere, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressureless sintering silver paste production and processing equipment, comprising a machine body, a ball milling mechanism, an output mechanism and a scraping mechanism, wherein a tank body is fixedly connected to the upper side of the machine body, the ball milling mechanism comprises a rotating cylinder rotatably connected to the inner wall of the tank body, a plurality of groups of balls are arranged in the rotating cylinder, the ball milling mechanism is used to mix and grind the silver paste by rolling the balls, the output mechanism comprises an output frame installed in the machine body, an output slot that can be connected to the output frame is provided on the rotating cylinder, and the output mechanism is used to open the output slot and the output frame when the silver paste needs to be output. The scraping mechanism outputs the silver paste downward from the output frame in a connected state between the balls, the scraping mechanism comprises an elastic cloth installed on the rotating cylinder, a mounting groove is provided on the side of the rotating cylinder, the four sides of the elastic cloth are fixedly connected to the mounting groove, a plurality of groups of elastic holes are evenly provided on the elastic cloth, and the scraping mechanism is used to rotate the elastic cloth to a position below the ball when the ball needs to be cleaned, and push the ball to pass through the elastic hole for output, and the silver paste on the surface of the ball is scraped and collected through the elastic hole, so as to improve the ball milling efficiency of the silver paste while reducing the waste caused by the silver paste adhering to the surface of the ball.

[0006] Preferably, the scraping mechanism also includes a cleaning box fixedly installed in the body, a connecting groove connected to the upper side of the cleaning box is opened at the bottom of the tank body, the connecting groove can be connected to the mounting groove, the cleaning box is used to store solvent, a baffle and a mounting plate are fixedly connected to the upper side of the body, the baffle and the mounting plate are respectively located at two ends of the tank body, a pushing piece for assisting in pushing out the sphere is provided in the tank body, and a switching piece for switching the position of the rotating cylinder is provided on the tank body, so that when the sphere needs to be cleaned, the elastic cloth can be rotated to the position below the sphere, and the sphere can be pushed to pass through the elastic hole for output, and the silver paste on the surface of the sphere can be scraped and collected through the elastic hole.

[0007] Preferably, the ejection member includes a fixed box fixedly installed between the baffle and the mounting plate, the inner wall of the fixed box is slidably connected to a lifting plate in a vertical direction, the top of the lifting plate is fixedly connected to a spring fixedly connected to the fixed box, the bottom surface of the fixed box is fixedly connected to a bottom plate, the bottom plate is evenly provided with a plurality of groups of through holes that can be positioned opposite to the elastic holes, the bottom surface of the lifting plate is fixedly connected to a plurality of groups of pushing rods that can be slidably connected to the inner walls of the through holes in a vertical direction, and the mounting plate is provided with a driving member for controlling the air pressure in the tank body while linking the lifting plate to move up and down, so as to assist in ejecting the ball.

[0008] Preferably, the driving member includes a vacuum pump fixedly mounted on the mounting plate, and the top surface of the fixed box is fixedly connected with a one-way valve for controlling the one-way flow of gas from the rotating cylinder into the fixed box, and the side surface of the fixed box is connected with a connecting pipe connected to the input end of the vacuum pump, so as to facilitate the lifting and lowering movement of the lifting plate while controlling the air pressure in the tank.

[0009] Preferably, the output mechanism also includes an opening and closing plate slidably connected to the inner wall of the output frame in a vertical direction, the top of the opening and closing plate can be plugged into the output slot, a device box is fixedly connected in the cleaning box, an electric telescopic rod is fixedly connected in the device box, the telescopic end of the electric telescopic rod is fixedly connected to the bottom surface of the opening and closing plate, and the top surface of the device box is fixedly connected to the bottom surface of the output frame, so as to facilitate opening the connection between the output slot and the output frame when the silver paste needs to be output, and output the silver paste downward from the output frame.

[0010] Preferably, the ball milling mechanism also includes a rotating ring rotatably connected to both ends of the inner wall of the rotating cylinder, and a plurality of groups of rotating rods are evenly and fixedly connected between two groups of the rotating rings. The outer wall of the rotating rod is slidably fitted with the inner wall of the rotating cylinder, and the rotating rod can be slidably fitted with the outer walls of the fixed box and the elastic cloth. A rotating part is provided on the mounting plate to drive the rotating ring to rotate, so as to facilitate the mixing and grinding of the silver paste by the rolling of the ball.

[0011] Preferably, a feed hopper is fixedly connected to the baffle plate, a cover plate is hinged at the upper end of the feed hopper, the bottom end of the feed hopper can be communicated with the rotating cylinder, an opening and closing door is hinged on the mounting plate, the side of the output frame is connected to the output hopper, the side of the cleaning box is connected to the discharge hopper, a gate plate for controlling the opening and closing state of the discharge hopper is provided on the cleaning box, the side of the cleaning box is connected to a water injection pipe, a water inlet pipe is fixedly connected to the top of the tank body, and a delivery pipe for connecting the water inlet pipe and the mounting groove is provided on the tank body, so as to facilitate the stable operation of the auxiliary equipment as a whole.

[0012] Preferably, the rotating member includes a first motor fixedly mounted on the mounting plate, the output end of the first motor is coaxially fixedly connected with a first gear, and a group of rotating rings close to the first motor are fixedly connected with a first outer gear ring meshing with the first gear, so as to drive the rotating ring to rotate.

[0013] Preferably, the switching member includes a second motor fixedly mounted on the tank body, the output end of the second motor is coaxially fixedly connected to a second gear, and the outer wall of the rotating cylinder is fixedly connected to a second outer gear ring meshing with the second gear, so as to drive the rotating cylinder to rotate and switch the position of the elastic cloth.

[0014] Preferably, a support frame is fixedly connected in the mounting groove, the support frame is in a grid shape, the side of the elastic cloth is fitted with the support frame, and the position of the elastic hole corresponds to the position of the middle of the support frame grid, so as to facilitate supporting one side of the elastic cloth, so that when the ball is pressed down, the position of the elastic hole is exactly in the recess.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a pressureless sintering silver paste production and processing equipment, which solves the problem that the silver paste is easily adhered to the surface of the ball when the silver paste is ball-milled and stirred, making it difficult to fully output, resulting in a part of the product being wasted. The silver paste is mixed and ground by the rolling of the ball in the ball mill mechanism. When the silver paste needs to be output, the connection between the output groove and the output frame is opened by the output mechanism, and the silver paste is output downward from the output frame. When the ball needs to be cleaned, the scraping mechanism rotates the elastic cloth to the position below the ball, and pushes the ball to pass through the elastic hole for output. The silver paste on the surface of the ball is scraped and collected through the elastic hole, thereby reducing the amount of silver paste adhering to the surface of the ball and reducing the waste of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the machine body of the present invention; Figure 3 It is a schematic diagram of the partial structure of the output mechanism of the present invention; Figure 4 for Figure 3 A magnified image of the middle A area; Figure 5 It is a partial structural sectional view of the output mechanism of the present invention; Figure 6 for Figure 5 Enlarged view of area B; Figure 7 It is a schematic diagram of the local structure of the ball mill mechanism of the present invention; Figure 8 for Figure 7 Enlarged view of area C in the middle; Fig. 9 It is a schematic diagram of the partial structure of the scraping mechanism of the present invention; Fig.10 for Fig. 9 Enlarged view of area D in the middle; Fig.11 It is a partial structural cross-sectional view of the scraping mechanism of the present invention; Fig.12 for Fig.11 Enlarged view of area E.

[0017] In the figure: 1-machine body; 2-tank body; 3-rotating cylinder; 4-ball; 5-output frame; 6-output slot; 7-elastic cloth; 8-mounting slot; 9-elastic hole; 10-cleaning box; 11-connecting slot; 12-baffle; 13-mounting plate; 14-fixing box; 15-lifting plate; 16-spring; 17-bottom plate; 18-through hole; 19-pushing rod; 20-vacuum pump; 21-check valve; 22-connecting pipe; 23-opening and closing plate; 24-electric telescopic rod; 25-rotating ring; 26-rotating rod; 27-feed hopper; 28-cover plate; 29-opening and closing door; 30-output hopper; 31-discharge hopper; 32-gate; 33-water injection pipe; 34-water inlet pipe; 35-delivery pipe; 36-first motor; 37-first gear; 38-first outer gear ring; 39-second motor; 40-second gear; 41-second outer gear ring; 42-support frame; 43-device box. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0019] See also Figure 1-Figure 12 The present invention provides a technical solution: a pressureless sintering silver paste production and processing equipment, including a machine body 1, a ball milling mechanism, an output mechanism and a scraping mechanism, a tank body 2 is fixedly connected to the upper side of the machine body 1, the ball milling mechanism includes a rotating cylinder 3 rotatably connected to the inner wall of the tank body 2, a plurality of groups of balls 4 are arranged in the rotating cylinder 3, the ball milling mechanism is used to mix and grind the silver paste by rolling the balls 4, the output mechanism includes an output frame 5 installed in the machine body 1, an output slot 6 that can be connected to the output frame 5 is opened on the rotating cylinder 3, and the output mechanism is used to open the communication state between the output slot 6 and the output frame 5 when the silver paste needs to be output, and output the silver paste downward from the output frame 5.

[0020] The scraping mechanism includes an elastic cloth 7 installed on the rotating cylinder 3. A mounting groove 8 is provided on the side of the rotating cylinder 3. The elastic cloth 7 is fixedly connected to the mounting groove 8 on all sides. A plurality of elastic holes 9 are evenly provided on the elastic cloth 7. A support frame 42 is fixedly connected in the mounting groove 8. The support frame 42 is in a grid shape. The side of the elastic cloth 7 fits the support frame 42. The position of the elastic hole 9 corresponds to the position in the middle of the grid of the support frame 42. The scraping mechanism is used to rotate the elastic cloth 7 to the position below the sphere 4 when it is necessary to clean the sphere 4, and push the sphere 4 to pass through the elastic hole 9 for output, so as to scrape and collect the silver paste on the surface of the sphere 4 through the elastic hole 9.

[0021] The scraping mechanism also includes a cleaning box 10 fixedly installed in the body 1, and a connecting groove 11 connected to the upper side of the cleaning box 10 is opened at the bottom of the tank body 2, and the connecting groove 11 can be connected to the mounting groove 8. The cleaning box 10 is used to store solvents. A baffle 12 and a mounting plate 13 are fixedly connected to the upper side of the body 1, and the baffle 12 and the mounting plate 13 are respectively located at the two ends of the tank body 2. A pushing member for assisting in pushing out the ball 4 is provided in the tank body 2, and a switching member for switching the position of the rotating cylinder 3 is provided on the tank body 2. The switching member includes a second motor 39 fixedly installed on the tank body 2. The model of the second motor 39 is preferably a 42BYGH34 stepping motor. The output end of the second motor 39 is coaxially fixedly connected to a second gear 40, and the outer wall of the rotating cylinder 3 is fixedly connected to a second outer gear ring 41 meshing with the second gear 40.

[0022] The ejection member includes a fixed box 14 fixedly installed between the baffle 12 and the mounting plate 13, the inner wall of the fixed box 14 is slidably connected with a lifting plate 15 in the vertical direction, the top of the lifting plate 15 is fixedly connected with a spring 16 fixedly connected to the fixed box 14, the bottom surface of the fixed box 14 is fixedly connected with a bottom plate 17, and the bottom plate 17 is evenly provided with a plurality of groups of through holes 18 that can be positioned opposite to the elastic holes 9, the bottom surface of the lifting plate 15 is fixedly connected with a plurality of groups of push rods 19 that can be slidably connected to the inner walls of the through holes 18 in the vertical direction, and a driving member for linking the lifting plate 15 to move up and down while controlling the air pressure in the tank body 2 is provided on the mounting plate 13, the driving member includes a vacuum pump 20 fixedly installed on the mounting plate 13, the top surface of the fixed box 14 is fixedly connected with a one-way valve 21 for controlling the one-way flow of gas from the rotating cylinder 3 into the fixed box 14, and the side of the fixed box 14 is connected with a connecting pipe 22 connected to the input end of the vacuum pump 20.

[0023] The output mechanism also includes an opening and closing plate 23 that is slidably connected to the inner wall of the output frame 5 in the vertical direction. The top of the opening and closing plate 23 can be plugged into the output slot 6. A device box 43 is fixedly connected to the cleaning box 10. An electric telescopic rod 24 is fixedly connected to the device box 43. The telescopic end of the electric telescopic rod 24 is fixedly connected to the bottom surface of the opening and closing plate 23. The top surface of the device box 43 is fixedly connected to the bottom surface of the output frame 5.

[0024] The ball milling mechanism also includes a rotating ring 25 rotatably connected to both ends of the inner wall of the rotating cylinder 3, and multiple groups of rotating rods 26 are evenly and fixedly connected between the two groups of rotating rings 25. The outer wall of the rotating rod 26 is slidably fitted with the inner wall of the rotating cylinder 3, and the rotating rod 26 can be slidably fitted with the outer wall of the fixed box and the elastic cloth 7. A rotating member for driving the rotating ring 25 to rotate is provided on the mounting plate 13, and the rotating member includes a first motor 36 fixedly mounted on the mounting plate 13. The model of the first motor 36 is preferably a 42BYGH34 stepping motor. The output end of the first motor 36 is coaxially fixedly connected with a first gear 37, and a first outer gear ring 38 meshing with the first gear 37 is fixedly connected to a group of rotating rings 25 close to the first motor 36.

[0025] A feed hopper 27 is fixedly connected to the baffle 12, a cover plate 28 is hinged on the upper end of the feed hopper 27, the bottom end of the feed hopper 27 can be connected to the rotating cylinder 3, an opening and closing door 29 is hinged on the mounting plate 13, the side of the output frame 5 is connected to the output hopper 30, the side of the cleaning box 10 is connected to the discharge hopper 31, the cleaning box 10 is provided with a gate plate 32 for controlling the opening and closing state of the discharge hopper 31, the side of the cleaning box 10 is connected to a water injection pipe 33, a water inlet pipe 34 is fixedly connected to the top of the tank body 2, and a delivery pipe 35 for connecting the water inlet pipe 34 with the mounting groove 8 is provided on the tank body 2.

[0026] The preparation process of liquid metal microcapsules is as follows: ① Liquid metal emulsification: 0.5g of sodium dodecyl sulfate was dissolved in 50mL of deionized water, 10g of eutectic GaInSn liquid metal was added, and the mixture was placed in a high-speed shear emulsifier for emulsification at 25°C for 10 minutes at a speed of 12000rpm to form a liquid metal emulsion. Nitrogen protection was used throughout the emulsification process; ② Microcapsule polymerization reaction: The above emulsion was transferred to a three-necked flask, 5g of carboxylated polyester polyol was added, and the mechanical stirring speed was 500rpm, and then Add 2g of isophorone diisocyanate dropwise, and add 0.1g of dibutyltin dilaurate catalyst at the same time, adjust the pH value to 8 with sodium bicarbonate, and keep in a constant temperature water bath at 40℃ for 3 hours; ③ Microcapsule curing: heat the above reaction solution to 60℃, continue stirring for 1 hour, place the reaction solution in a centrifuge, centrifuge at 4000rpm for 10 minutes, collect microcapsules, and finally wash them 3 times with a mixed solution of ethanol / water with a volume ratio of 1:1, and vacuum dry at 40℃ for 12 hours to obtain liquid metal microcapsule powder.

[0027] The method for preparing the pressureless sintering silver paste comprises the following steps: S1. Weigh the organic solvent, dispersant, rheological agent, defoamer and other components in the organic carrier according to mass percentage, wherein the organic solvent is 2.3~~5.5wt%, the dispersant is 0.20~0.27wt%, the rheological agent is 0.05~0.08wt%, and the defoamer is 0.25~0.35wt%, and the dispersant, rheological agent, defoamer, etc. are added to the organic solvent in sequence and mixed evenly; S2. Weigh 90-95 wt% of the silver powder filler according to the mass percentage, wherein the weight ratio of the micron and nano silver powders is between 9:1 and 8:2, add the micro-nano silver powder mixture to the above solvent, and mix evenly by mechanical stirring; S3. Then, 2 to 4% mass fraction of liquid metal microcapsules was added to the mixed solution, and the mixture was placed in a tank 2 and ground and mixed evenly, and ball milled at 2500rpm for 5min to obtain a uniform silver paste; S4. Apply the silver paste obtained after degassing treatment on the chip surface by screen printing or dispensing process, and then sinter it at 180~220℃ for 10~20min to obtain a high reliability interconnection structure.

[0028] Working principle: the liquid metal microcapsules produced and the required silver powder, organic solvent, dispersant, rheological agent, defoaming agent and other component raw materials are added into the rotating cylinder 3 through the feeding hopper 27, and the top cover plate 28 and the opening and closing door 29 are covered, so that the rotating cylinder 3 and the tank body 2 are in a sealed state as a whole, and the vacuum pump 20 is started to extract the gas in the fixed box 14, and the lifting plate 15 drives the push rod 19 to move upward. At the same time, the gas inside the tank body 2 will also enter the fixed box 14 through the one-way valve 21, and then be extracted through the connecting pipe 22 and the vacuum pump 20, until the tank body 2 and the fixed box 14 are in a vacuum state as a whole. During this process, the electric telescopic rod 24 is in a pushed-out state, and the output slot 6 is plugged and blocked by the opening and closing plate 23 to ensure that the tank body 2 is in a closed vacuum state as a whole.

[0029] The first motor 36 is started to drive the first gear 37 to drive the first outer gear ring 38 to rotate, so that the rotating ring 25 drives the rotating rod 26 to rotate on the inner wall of the rotating cylinder 3, and the raw material and the ball 4 are continuously stirred together, so that the ball 4 fully grinds the raw material. After the grinding is completed, the first motor 36 is stopped, and the rotating rod 26 is ensured to be located at the positions on both sides of the output groove 6. Thereafter, the electric telescopic rod 24 is controlled to move the opening and closing plate 23 downward, and the output groove 6 is gradually opened. The silver paste at the bottom of the rotating cylinder 3 will flow downward into the output frame 5 through the output groove 6, and then be output and collected through the output bucket 30. The width of the output groove 6 is smaller than the radius of the ball 4, which can prevent the ball 4 from falling into the output groove 6. At this time, it is necessary to stand for a period of time, or start the first motor 36 to slowly stir the ball 4 at the bottom, so that the raw material can be fully output downward. After outputting for a period of time, the opening and closing plate 23 can be lifted up again for the next raw material ball milling operation.

[0030] After the last raw material processing is completed and the raw materials are output, the sphere 4 needs to be fully cleaned. At this time, the second motor 39 is controlled to drive the second gear 40 to make the second outer gear ring 41 rotate 180°, and the installation groove 8 and the elastic cloth 7 are rotated to the lower position, so that the installation groove 8 and the connecting groove 11 are aligned. Due to the support of the grid-shaped support frame 42, the sphere 4 will preferentially fall into the middle of the grid of the support frame 42 when it contacts the elastic cloth 7. At this time, the sphere 4 is just at the position of the elastic hole 9, and the elastic cloth 7 is initially pressed down to form a concave installation, the suction state of the vacuum pump 20 is released, and the external gas is input into the fixed box 14 through the connecting pipe 22. At this time, the spring 16 pushes the lifting plate 15 to move downward, and at this time the gas in the fixed box 14 cannot flow into the rotating cylinder 3 through the one-way valve 21, and the lifting plate 15 drives the push rod 19 to move down to the top of the elastic hole 9, and At this time, the sphere 4 above the elastic hole 9 is pushed downward, and the sphere 4 gradually passes through the elastic hole 9 to reach the bottom of the elastic cloth 7 and falls into the cleaning box 10, so that the silver paste adhered to the outer wall of the sphere 4 can be fully scraped off through the inner wall of the elastic hole 9. After scraping, the vacuum pump 20 is controlled to suck again to move the lifting plate 15 upward, and then the first motor 36 is controlled to rotate the rotating rod 26 by a certain angle, and the eye paste on the upper side of the elastic cloth 7 is scraped off to the rotating rod 26 for preliminary collection, and then the pushing rod 19 is controlled to move downward to push the remaining spheres 4 into the cleaning box 10, and this process is repeated until all the spheres 4 are pushed out, and the rotating cylinder 3 is controlled to rotate 180°. After the elastic cloth 7 is rotated to the upper position, the output slot 6 reaches the bottom position, and the rotating rod 26 is controlled to rotate to scrape off the less silver paste adhered to the inner wall of the rotating cylinder 3 and the elastic cloth 7 to the position of the output slot 6 for output.

[0031] It is worth noting that the top of the opening and closing plate 23 and both sides of the top of the output frame 5 are both tapered, so that when the silver paste is output downward through the output groove 6, it will be close to the outer wall of the opening and closing plate 23 and flow into the output frame 5. When the sphere 4 is output downward, the sphere 4 cannot stay on the top of the opening and closing plate 23 and the output frame 5. At this time, an auxiliary lateral pushing mechanism can be set in the output frame 5 to push the sphere 4 that just falls on the top of the opening and closing plate 23 and the output frame 5 into the cleaning boxes 10 on both sides. The opening size of the top of the output frame 5 is smaller than the radius of the sphere 4, reducing the probability of the sphere 4 falling on top.

[0032] By injecting solvent into the cleaning box 10 through the water injection pipe 33, the remaining raw materials on the surface of the sphere 4 in the cleaning box 10 can be dissolved and cleaned. At the same time, the side opening and closing door 29 can be opened to scrape out the remaining silver paste in the rotating cylinder 3 and on the rotating rod 26. The scraper can also be synchronously operated to scrape the silver paste in the output frame 5 to the output bucket 30 for discharge. The structure of the inner wall of the output frame 5 and the rotating cylinder 3 is relatively flat, and the cleaning operation is relatively convenient. There are also many existing cleaning methods, which will not be repeated here, and only the cleaning of the sphere 4 will be explained.

[0033] The elastic cloth 7 is rotated to the top position, and the output slot 6 at the bottom of the rotating drum 3 is blocked by the opening and closing plate 23. The solvent is sprayed evenly from the water inlet pipe 34 and the delivery pipe 35 at the top to the top of the installation slot 8. The solvent flows downward to the inside of the rotating drum 3 and the outer wall of the fixed box 14 after passing through the elastic cloth 7 and the elastic hole 9. The first motor 36 is started to drive the rotating rod 26 to stir, and the raw materials in the rotating drum 3 and on the elastic cloth 7 can be fully dissolved and removed by the solvent. Finally, the opening and closing door 29 is opened to extract the solvent impurities together. The inner wall of the rotating cylinder 3 is cleaned. When the balls 4 in the cleaning box 10 are cleaned, the gate 32 is opened to discharge the solvent impurities together with the balls 4 through the discharge hopper 31. In subsequent use, the dried balls 4 are loaded into the rotating cylinder 3 again through the feed hopper 27 for repeated ball milling. The water inlet pipe 34 and the water injection pipe 33 need to be closed after use. Through the arrangement of the bottom plate 17 and the through hole 18, the silver paste on the surface of the push rod 19 can be scraped off during the lifting and lowering of the push rod 19.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressureless sintering silver paste production and processing equipment, characterized in that: include: A machine body (1), wherein a tank body (2) is fixedly connected to the upper side of the machine body (1); Also includes: A ball milling mechanism, the ball milling mechanism comprising a rotating cylinder (3) rotatably connected to the inner wall of the tank body (2), a plurality of groups of balls (4) being arranged in the rotating cylinder (3), and the ball milling mechanism is used to stir and grind the silver paste by rolling the balls (4); an output mechanism, the output mechanism comprising an output frame (5) installed in the body (1), the rotating cylinder (3) being provided with an output slot (6) capable of communicating with the output frame (5), the output mechanism being used to open the communication state between the output slot (6) and the output frame (5) when it is necessary to output the silver paste, so as to output the silver paste downward from the output frame (5); A scraping mechanism, the scraping mechanism comprising an elastic cloth (7) mounted on the rotating cylinder (3), a mounting groove (8) being provided on the side of the rotating cylinder (3), the four sides of the elastic cloth (7) being fixedly connected to the mounting groove (8), a plurality of groups of elastic holes (9) being evenly provided on the elastic cloth (7), the scraping mechanism being used for rotating the elastic cloth (7) to a position below the sphere (4) when it is necessary to clean the sphere (4), and pushing the sphere (4) to pass through the elastic hole (9) for output, and scraping and collecting the silver paste on the surface of the sphere (4) through the elastic hole (9).

2. The pressureless sintering silver paste production and processing equipment according to claim 1, characterized in that: The scraping mechanism further comprises a cleaning box (10) fixedly mounted in the body (1); a communicating groove (11) communicating with the upper side of the cleaning box (10) is provided at the bottom of the tank body (2); the communicating groove (11) can be communicated with the mounting groove (8); the cleaning box (10) is used to store solvent; a baffle (12) and a mounting plate (13) are fixedly connected to the upper side of the body (1); the baffle (12) and the mounting plate (13) are respectively located at two ends of the tank body (2); a pushing member for assisting in pushing out the ball (4) is provided in the tank body (2); and a switching member for switching the position of the rotating cylinder (3) is provided on the tank body (2).

3. The pressureless sintering silver paste production and processing equipment according to claim 2, characterized in that: The ejection member comprises a fixed box (14) fixedly mounted between the baffle plate (12) and the mounting plate (13); the inner wall of the fixed box (14) is slidably connected to a lifting plate (15) in a vertical direction; the top of the lifting plate (15) is fixedly connected to a spring (16) fixedly connected to the fixed box (14); the bottom surface of the fixed box (14) is fixedly connected to a bottom plate (17); the bottom plate (17) is evenly provided with a plurality of groups of through holes (18) that can be positioned opposite to the elastic holes (9); the bottom surface of the lifting plate (15) is fixedly connected to a plurality of groups of push rods (19) that can be slidably connected to the inner walls of the through holes (18) in a vertical direction; and the mounting plate (13) is provided with a driving member for controlling the air pressure in the tank body (2) and simultaneously linking the lifting plate (15) to move up and down.

4. The pressureless sintering silver paste production and processing equipment according to claim 3, characterized in that: The driving member comprises a vacuum pump (20) fixedly mounted on the mounting plate (13); a one-way valve (21) for controlling the one-way flow of gas from the rotating cylinder (3) into the fixed box (14) is fixedly connected to the top surface of the fixed box (14); and a connecting pipe (22) connected to the input end of the vacuum pump (20) is connected to the side surface of the fixed box (14).

5. The pressureless sintering silver paste production and processing equipment according to claim 4, characterized in that: The output mechanism further comprises an opening and closing plate (23) slidably connected to the inner wall of the output frame (5) in a vertical direction, the top end of the opening and closing plate (23) being pluggable with the output slot (6), a device box (43) being fixedly connected inside the cleaning box (10), an electric telescopic rod (24) being fixedly connected inside the device box (43), a telescopic end of the electric telescopic rod (24) being fixedly connected to the bottom surface of the opening and closing plate (23), and a top surface of the device box (43) being fixedly connected to the bottom surface of the output frame (5).

6. The pressureless sintering silver paste production and processing equipment according to claim 5, characterized in that: The ball mill mechanism further comprises a rotating ring (25) rotatably connected to both ends of the inner wall of the rotating cylinder (3); a plurality of rotating rods (26) are evenly and fixedly connected between two groups of the rotating rings (25); the outer walls of the rotating rods (26) are slidably fitted with the inner wall of the rotating cylinder (3); the rotating rods (26) are slidably fitted with the outer walls of the fixed box and the elastic cloth (7); and a rotating member for driving the rotating rings (25) to rotate is provided on the mounting plate (13).

7. The pressureless sintering silver paste production and processing equipment according to claim 6, characterized in that: The baffle plate (12) is fixedly connected to a feed hopper (27), the upper end of which is hingedly connected to a cover plate (28), the bottom end of which is capable of being connected to the rotating cylinder (3), the mounting plate (13) is hingedly connected to an opening and closing door (29), the side of the output frame (5) is connected to an output hopper (30), the side of the cleaning box (10) is connected to a discharge hopper (31), the cleaning box (10) is provided with a gate plate (32) for controlling the opening and closing state of the discharge hopper (31), the side of the cleaning box (10) is connected to a water injection pipe (33), the top end of the tank body (2) is fixedly connected to a water inlet pipe (34), and the tank body (2) is provided with a delivery pipe (35) for connecting the water inlet pipe (34) with the mounting groove (8).

8. The pressureless sintering silver paste production and processing equipment according to claim 6, characterized in that: The rotating member comprises a first motor (36) fixedly mounted on the mounting plate (13); an output end of the first motor (36) is coaxially fixedly connected to a first gear (37); and a first outer gear ring (38) meshing with the first gear (37) is fixedly connected to a group of the rotating rings (25) close to the first motor (36).

9. The pressureless sintering silver paste production and processing equipment according to claim 2, characterized in that: The switching member comprises a second motor (39) fixedly mounted on the tank body (2); an output end of the second motor (39) is coaxially fixedly connected to a second gear (40); and an outer wall of the rotating cylinder (3) is fixedly connected to a second outer gear ring (41) meshing with the second gear (40).

10. The pressureless sintering silver paste production and processing equipment according to claim 1, characterized in that: A support frame (42) is fixedly connected in the mounting groove (8), the support frame (42) is in a grid shape, the side surface of the elastic cloth (7) is in contact with the support frame (42), and the position of the elastic hole (9) corresponds to the position of the middle of the grid of the support frame (42).

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