Solder paste and flux paste grinding machine

Abstract

The utility model relates to a solder paste and flux paste grinding machine, which belongs to the technical field of material grinding processing, and is characterized in that a feeding mechanism is arranged above a three-roller grinding mechanism, a support frame of the feeding mechanism is fixed on the upper end surface of a case at two ends of a grinding groove, a feeding hopper and a feeding pipeline are arranged on the support frame, and an openable sealing cover is arranged at the top of the feeding hopper; as the opening in the top of the feeding hopper is large, operators can conveniently and quickly feed materials; a feeding pipeline is arranged in the feeding hopper and extends to the bottom of the feeding hopper from the interior of the feeding hopper, a feeding port is formed in the side wall of the feeding pipeline and communicated with the feeding hopper, a pneumatic feeding assembly is arranged in the feeding pipeline, a feeding nozzle is arranged at the bottom of the feeding pipeline, and an opening of the feeding nozzle is aligned to the area between the first roller and the second roller in the grinding groove. The feeding mechanism continuously feeds the flux paste to the three-roller grinding mechanism, the grinding efficiency is improved, meanwhile, the operation difficulty is reduced, and the production continuity is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of material grinding and processing technology, and in particular to a solder paste grinding machine. Background Technology

[0002] Solder paste, also known as solder paste, is a gray paste-like material that emerged with the development of surface mount technology (SMT). It is a paste-like mixture of soldering powder, flux, and other surfactants and thixotropic agents, primarily used for soldering electronic components such as resistors, capacitors, and ICs on PCBs in the SMT industry. A three-roll mill is a type of grinding machine suitable for manufacturing pastes such as paints, inks, pigments, and plastics. The grinding effect is achieved through friction at different speeds between the surfaces of three horizontal rollers. Current flux production typically involves mixing soldering powder and flux before feeding them into a three-roll mill. Because the mixed flux is a paste, it needs to be manually added between two rollers, a cumbersome process. Furthermore, the amount of flux on the mill decreases during the grinding process, requiring frequent manual replenishment and significant manpower, which hinders efficient flux grinding. Utility Model Content

[0003] Therefore, it is necessary to provide a solder paste polishing machine.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A solder paste polishing machine includes a three-roll polishing mechanism and a feeding mechanism. The three-roll polishing mechanism includes a machine housing. A downwardly recessed polishing groove is provided on the upper surface of the machine housing. A first roller, a second roller, and a third roller are arranged sequentially in the polishing groove. The feeding mechanism is fixed to the top of the machine housing. The feeding mechanism includes a support frame, a feeding hopper, a feeding pipe, and a feeding nozzle. The two ends of the support frame are fixed to the upper surface of the machine housing at both ends of the polishing groove. The feeding hopper is fixed on the support frame. The feeding pipe is arranged inside the feeding hopper. The upper end of the feeding pipe is located inside the feeding hopper, and the lower end of the feeding pipe extends below the feeding hopper. The side wall of the feeding pipe is connected to the feeding hopper. A pneumatic feeding component is provided inside the feeding pipe. The feeding nozzle is fixed to the bottom of the feeding pipe and is located above the first roller and the second roller. It is used to feed solder paste into the polishing area between the first roller and the second roller.

[0005] In one embodiment, the top of the feeding hopper is provided with an openable sealing cover, and the sealing cover is provided with an observation window for observing the remaining amount of flux in the feeding hopper.

[0006] In one embodiment, the side wall of the feeding pipe is provided with a feeding port, which is connected to the feeding hopper.

[0007] In one embodiment, a first check valve is provided at the feed inlet.

[0008] In one embodiment, the pneumatic feeding assembly includes a drive cylinder, a drive rod, and a feeding piston disposed at the upper end of the feeding pipe. The output end of the drive cylinder is fixedly connected to the upper end of the drive rod, and the bottom of the drive rod is slidably and fixedly connected to the feeding piston.

[0009] In one embodiment, the diameter of the feeding piston matches the inner diameter of the feeding pipe.

[0010] In one embodiment, the bottom of the feeding piston is provided with a scraper for removing residual flux from the inner wall of the feeding pipe.

[0011] In one embodiment, a second one-way valve is provided at the bottom of the feeding pipe.

[0012] In one embodiment, the bottom of the feeding nozzle is flat, and the opening at the bottom of the feeding nozzle gradually decreases from top to bottom.

[0013] In one embodiment, symmetrically distributed baffles are provided on both sides of the grinding groove, the baffles are disposed between the first roller and the second roller, and the height of the baffles is higher than that of the first roller.

[0014] The beneficial effects of this utility model are as follows: The solder paste polishing machine provided by this utility model has a feeding mechanism set above the three-roll polishing mechanism. The support frame of the feeding mechanism is fixed on the upper end face of the machine box at both ends of the polishing tank. The support frame is equipped with a feeding hopper and a feeding pipe. The top of the feeding hopper is equipped with an openable sealing cover. Due to the large opening at the top of the feeding hopper, it is convenient for the operator to quickly add material. The feeding pipe is provided inside the feeding hopper and extends from the inside of the feeding hopper to the bottom of the feeding hopper. The side wall of the feeding pipe is equipped with a feed inlet that communicates with the feeding hopper. The feeding pipe is equipped with a pneumatic feeding component. The bottom of the feeding pipe is equipped with a feeding nozzle. The opening of the feeding nozzle is aligned with the area between the first roller and the second roller in the polishing tank, so that the feeding mechanism continuously feeds solder paste to the three-roll polishing mechanism, improving polishing efficiency, reducing operating difficulty, and ensuring production continuity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a solder paste polishing machine according to one embodiment;

[0017] Figure 2 This is a cross-sectional schematic diagram of the feeding mechanism of a solder paste polishing machine according to one embodiment.

[0018] In the attached diagram, 10 is a solder paste polishing machine; 100 is a three-roll polishing mechanism; 110 is a machine casing; 120 is a polishing tank; 130 is a first roller; 140 is a second roller; 150 is a third roller; 160 is a baffle; 200 is a feeding mechanism; 210 is a support frame; 220 is a feeding hopper; 221 is a sealing cover; 222 is an observation window; 230 is a feeding pipe; 231 is a feed inlet; 232 is a first one-way valve; 233 is a pneumatic feeding assembly; 2331 is a drive cylinder; 2332 is a drive rod; 2333 is a feeding piston; 2334 is a scraper; 234 is a second one-way valve; and 240 is a feeding nozzle. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0020] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] In one embodiment, such as Figure 1 and Figure 2As shown, a solder paste polishing machine 10 includes a three-roll polishing mechanism 100 and a feeding mechanism 200. The three-roll polishing mechanism 100 includes a housing 110, and a downwardly recessed polishing groove 120 is provided on the upper surface of the housing 110. A first roller 130, a second roller 140, and a third roller 150 are sequentially arranged in the polishing groove 120. The feeding mechanism 200 is fixed to the top of the housing 110. The feeding mechanism 200 includes a support frame 210, a feeding hopper 220, a feeding pipe 230, and a feeding nozzle 240. The two ends of the support frame 210 are fixed to the two ends of the housing 110 at both ends of the polishing groove 120. On the upper end, the feeding hopper 220 is fixed on the support frame 210. The feeding pipe 230 is arranged inside the feeding hopper 220. The upper end of the feeding pipe 230 is located inside the feeding hopper 220, and the lower end of the feeding pipe 230 extends to the bottom of the feeding hopper 220. The side wall of the feeding pipe 230 is connected to the feeding hopper 220. A pneumatic feeding assembly 233 is provided inside the feeding pipe 230. The feeding nozzle 240 is fixed at the bottom of the feeding pipe 230 and is located above the first roller 130 and the second roller 140. It is used to feed the flux paste into the grinding area between the first roller 130 and the second roller 140.

[0022] In this embodiment, a grinding groove 120 is provided on the housing 110 of the three-roll grinding mechanism 100. A first roller 130, a second roller 140, and a third roller 150 are sequentially arranged on the grinding groove 120. The distance between the rollers is adjustable. There is a speed difference between the first roller 130 and the second roller 140. The shearing force generated by the speed difference between the rollers ensures that the flux is fully mixed and ground. The flux is then scraped off by the third roller 150 and falls into the collection device along the feeding groove of the three-roll grinding mechanism 100. The two ends of the support frame 210 in the feeding mechanism 200 are fixed to the upper end face of the housing 110 on both sides of the grinding groove 120, so that the support frame 210 is arranged across the grinding groove 120. A feeding hopper 220 is fixed in the middle of the support frame 210 for feeding. The pipe 230 is vertically installed inside the feeding hopper 220. The lower end of the feeding pipe 230 extends from the inside of the feeding hopper 220 to below the feeding hopper 220 and is connected to the feeding nozzle 240. The feeding hopper 220 is connected to the side wall of the feeding pipe 230. A pneumatic feeding assembly 233 is installed inside the feeding pipe 230. The pneumatic feeding assembly 233 can move up and down inside the feeding pipe 230. When the pneumatic feeding assembly 233 moves upward, the flux in the feeding assembly is sucked into the feeding pipe 230. When the pneumatic feeding assembly 233 moves downward, the flux is pushed through the feeding pipe 230 to the feeding nozzle 240 and evenly fed into the area of ​​the first roller 130 and the second roller 140, realizing automatic feeding of flux and reducing labor costs.

[0023] In one embodiment, the top of the feeding hopper 220 is provided with an openable sealing cover 221, and the sealing cover 221 is provided with an observation window 222 for observing the remaining amount of flux in the feeding hopper 220. Specifically, since the feeding hopper 220 has a conical structure that is larger at the top and smaller at the bottom, feeding from the top of the feeding hopper 220 makes it convenient to replenish solder paste and reduces the difficulty of operation. In order to improve the sealing performance of the feeding hopper 220 and prevent the flux from being contaminated or dried out, a sealing cover 221 is provided at the top of the feeding hopper 220. When it is necessary to replenish the flux, simply open the sealing cover 221 to perform the feeding operation. The sealing cover 221 is provided with an observation window 222, which is made of transparent material. The operator can monitor the remaining amount of flux in real time through the observation window 222, thereby replenishing the flux in a timely manner and ensuring the continuity and stability of the production process. It is worth noting that the three-roll grinding mechanism 100 in this utility model is a common device on the market, a technology that is known to those skilled in the art and is achievable, and will not be described in detail.

[0024] In one embodiment, the feeding pipe 230 has an inlet 231 on its side wall, which is connected to the feeding hopper 220; a first one-way valve 232 is provided at the inlet 231. Specifically, the feeding pipe 230 has an inlet 231 on its side wall, which is connected to the inside of the feeding hopper 220, and a first one-way valve 232 is provided at the inlet 231 to ensure that the flux in the feeding hopper 220 can only flow into the feeding pipe 230 in one direction, preventing backflow.

[0025] In one embodiment, the pneumatic feeding assembly 233 includes a drive cylinder 2331, a drive rod 2332, and a feeding piston 2333 disposed at the upper end of the feeding pipe 230. The output end of the drive cylinder 2331 is fixedly connected to the upper end of the drive rod 2332, and the bottom of the drive rod 2332 is slidably and fixedly connected to the feeding piston. Specifically, the drive cylinder 2331 in the pneumatic feeding assembly 233 is located at the top of the feeding pipe 230. The output end of the drive cylinder 2331 is located inside the feeding pipe 230 and is fixedly connected to the upper end of the drive rod 2332. The lower end of the drive rod 2332 is fixedly connected to the feeding piston 2333. The extension and retraction of the drive cylinder 2331 drives the drive rod 2332 and the feeding piston 2333 to move up and down. Thus, when the drive cylinder 2331 retracts, the feeding piston 2333 rises and the flux is sucked into the feeding pipe 230; conversely, when the cylinder extends, the piston descends and the flux is pushed into the feeding nozzle 240 and evenly distributed from the feeding nozzle 240 between the first roller 130 and the second roller 140.

[0026] In one embodiment, the diameter of the feeding piston 2333 matches the inner diameter of the feeding pipe 230. Specifically, in order to improve the feeding efficiency of the pneumatic feeding assembly 233 and improve the airtightness of the feeding pipe 230, the diameter of the feeding piston 2333 is set to be the same as the inner diameter of the feeding pipe 230, so that the side wall of the feeding piston 2333 is in close contact with the inner wall of the feeding pipe 230 to reduce gas leakage. The feeding piston 2333 is made of rubber to enhance the sealing effect.

[0027] In one embodiment, a scraper 2334 is provided at the bottom of the feeding piston 2333 to remove residual solder paste from the inner wall of the feeding pipe 230. Specifically, the scraper 2334 is located at the bottom of the feeding piston 2333 and fits tightly against the inner wall of the pipe. When the feeding piston 2333 moves up and down, the scraper 2334 can effectively scrape off the residual solder paste from the inner wall of the pipe, preventing solder paste accumulation and ensuring the cleanliness of the pipe. At the same time, it prevents solder paste from entering above the feeding piston 2333, which could obstruct the cylinder's movement.

[0028] In one embodiment, a second one-way valve 234 is provided at the bottom of the feeding pipe 230. Specifically, the second one-way valve 234 is located at the outlet of the feeding pipe 230 to ensure that the flux can only flow out in one direction, preventing the flux from being re-drawn into the feeding pipe 230. At the same time, during the upward movement of the pneumatic feeding assembly 233, the flux in the feeding hopper 220 is preferentially drawn into the feeding pipe 230 through the first one-way valve 232, so that the feeding process can be stably operated and the unstable supply caused by flux backflow can be avoided.

[0029] In one embodiment, the bottom of the feeding nozzle 240 is flat, and the opening at the bottom of the feeding nozzle 240 gradually decreases from top to bottom. Specifically, the top of the feeding nozzle 240 is provided with a connection port that matches the feeding pipe 230, and the feeding nozzle 240 and the feeding pipe 230 are connected by threads; the bottom of the feeding nozzle 240 is flat, that is, the length of the feeding nozzle 240 is greater than its width, the opening gradually decreases from top to bottom, the cross-section of the feeding nozzle 240 is conical, and the length direction of the feeding nozzle 240 is parallel to the gap between the first roller 130 and the second roller 140, so that the flux can be evenly and accurately fed between the first roller 130 and the second roller 140.

[0030] In one embodiment, symmetrically distributed baffles 160 are provided on both sides of the grinding tank 120. The baffles 160 are positioned between the first roller 130 and the second roller 140, and the height of the baffles 160 is higher than that of the first roller 130. Specifically, due to the different rotational speeds of the first roller 130 and the second roller 140, a shearing force is generated between the first roller 130 and the second roller 140, causing the flux to gradually become elongated and extend to both sides during the grinding process. Therefore, the symmetrical arrangement of baffles 160 on both sides of the grinding tank 120, with the middle of the baffles 160 on the same plane as the gap between the first roller 130 and the second roller 140, effectively limits the extension range of the flux and prevents it from overflowing. Furthermore, the height of the baffles 160 is higher than that of the first roller 130, ensuring that the baffles 160 do not affect the normal operation of the rollers and improve the grinding effect.

[0031] The general workflow of this utility model is as follows: The three rollers of the three-roller grinding mechanism 100 are adjusted to a suitable gap. The equipment is started, causing the first roller 130, second roller 140, and third roller 150 to rotate at different speeds. Solder paste is added to the upper hopper 220. The pneumatic feeding component 233 in the feeding channel is activated, driving the cylinder 2331 to control the feeding piston 2333 to rise. Under the action of air pressure difference, the flux in the upper hopper 220 is sucked into the feeding pipe 230 through the first one-way valve 232. Subsequently… The drive cylinder 2331 controls the feeding piston 2333 to descend, the first one-way valve 232 stops discharging, and the flux in the feeding pipe 230 is pushed into the feeding nozzle 240. Since the feeding nozzle 240 is a flat conical design, the flux can be evenly fed between the first roller 130 and the second roller 140 for grinding. At the same time, the baffles 160 on both sides of the grinding tank 120 effectively restrict the extension of the flux. The ground solder paste is pushed into the feeding tank and falls into the collection device for storage under the action of the third roller 150.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tin paste flux paste mill characterized by, The application relates to a three-roller grinding mechanism and a feeding mechanism. The three-roller grinding mechanism comprises a machine box, a downwardly recessed grinding groove is arranged on the upper end surface of the machine box, a first roller, a second roller and a third roller are sequentially arranged in the grinding groove, and the feeding mechanism is fixed on the top of the machine box; the feeding mechanism comprises a supporting frame, a feeding hopper, a feeding pipeline and a feeding nozzle, the two ends of the supporting frame are fixed on the upper end surfaces of the machine boxes at the two ends of the grinding groove, the feeding hopper is fixed on the supporting frame, the feeding pipeline is arranged in the feeding hopper, the upper end of the feeding pipeline is located in the feeding hopper, the lower end of the feeding pipeline extends to below the feeding hopper, the side wall of the feeding pipeline is communicated with the feeding hopper, a pneumatic feeding assembly is arranged in the feeding pipeline, and the feeding nozzle is fixed on the bottom of the feeding pipeline and located above the first roller and the second roller and used for feeding the soldering paste into the grinding area between the first roller and the second roller.

2. The tin paste flux paste grinder according to claim 1, wherein, The top of the feeding hopper is provided with an openable sealing cover, the sealing cover is provided with an observation window, and the residual amount of the soldering paste in the feeding hopper can be observed.

3. The tin-pest solder paste mill of claim 1, wherein, The side wall of the feeding pipeline is provided with a feeding port communicated with the feeding hopper.

4. The tin-pest solder paste mill of claim 3, wherein, A first one-way valve is arranged at the feeding port.

5. The tin-pest solder paste mill of claim 1, wherein, The pneumatic feeding assembly comprises a driving cylinder arranged at the upper end of the feeding pipeline, a driving rod and a feeding piston, the output end of the driving cylinder is fixedly connected with the upper end of the driving rod, and the bottom of the driving rod is fixedly connected with the feeding piston.

6. The tin-pest solder paste mill of claim 5, wherein, The diameter of the feeding piston matches the inner diameter of the feeding pipeline.

7. The tin-pest solder paste mill of claim 6, wherein, The bottom of the feeding piston is provided with a scraper for cleaning the residual soldering paste on the inner wall of the feeding pipeline.

8. The tin-pest solder paste mill of claim 1, wherein, The bottom of the feeding pipeline is provided with a second one-way valve.

9. The tin-pest solder paste mill of claim 1, wherein, The bottom of the feeding nozzle is flat, and the opening of the bottom of the feeding nozzle gradually decreases from top to bottom.

10. The tin-pest solder paste mill of claim 1, wherein, The grinding groove is provided with symmetrically distributed baffles on the two sides, the baffles are arranged between the first roller and the second roller, and the height of the baffles is higher than that of the first roller.

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