Silver paste raw material multi-stage screening device for electronic components
By using a multi-stage screening device and vibration mechanism driven by a servo motor, the problem of easy clogging in the silver paste raw material screening device was solved, achieving efficient multi-stage screening and meeting the screening requirements of electronic components for fine particles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU HONGYUN ELECTRONIC MATERIALS CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-23
Smart Images
Figure CN224389289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of silver paste raw material processing technology, specifically to a multi-stage screening device for silver paste raw materials used in electronic components. Background Technology
[0002] In the field of electronic component manufacturing, silver paste, as a core raw material for conductive materials, directly affects the conductivity, reliability, and lifespan of components due to its particle size uniformity, impurity content, and dispersion. As electronic components develop towards miniaturization and high integration (such as 5G chips, flexible circuit boards, and semiconductor packaging), the demand for refined screening of silver paste raw materials is becoming increasingly stringent.
[0003] To address the goal of refining silver paste raw materials, existing technologies mostly use multiple screens for screening. When raw materials enter the screening box from the inlet, they tend to accumulate in one place, resulting in slow screening and easy clogging of the screen holes, thus reducing screening efficiency. Therefore, we provide a multi-stage screening device for silver paste raw materials used in electronic components. Utility Model Content
[0004] The purpose of this invention is to provide a multi-stage screening device for silver paste raw materials used in electronic components, so as to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A multi-stage screening device for silver paste raw materials for electronic components includes a screening device, which includes a support bracket. Screening boxes are slidably sleeved on the sliding rods on both sides of the support bracket. A feed hopper is fixedly installed on the top of the support bracket, and the output end of the feed hopper extends into the top of the screening box.
[0007] The feed hopper is equipped with a feeding unit, and the screening box is equipped with a screening unit.
[0008] The feeding unit includes a guide roller that is rotatably installed inside the feed hopper, and guide grooves are provided on all four sides of the guide roller.
[0009] A further improvement of this utility model is that a servo motor is fixedly installed on the left side of the support bracket, a main gear is fixedly installed on the output end of the servo motor, and a transmission toothed belt is meshed on the outer surface of the main gear. The model of the servo motor is MSMA042A1H.
[0010] A further improvement of this utility model is that: the other end of the transmission toothed belt is internally meshed with a driven gear, and the output end of the driven gear passes through the feed hopper and extends inside the guide roller.
[0011] A further improvement of the present invention is that the screening unit includes a screen one fixedly installed at the top of the inner wall of the screening box, and a screen two fixedly installed below the screen one on the inner wall of the screening box.
[0012] A further improvement of this utility model is that: a screen three is fixedly installed on the inner wall of the screening box below the screen two, and a slag outlet is fixedly installed on the upper right side of the screening box, which allows the particles on the screen to be discharged outwards during the later cleaning of the screen.
[0013] A further improvement of this utility model is that a drive rod is fixedly installed on the output end of the main gear, and the other end of the drive rod is rotatably installed at the front right side of the support bracket. A cam is fixedly sleeved on the outer surface of the drive rod.
[0014] A further improvement of this utility model is that: a ball bearing is rotatably installed inside the protruding end of the cam; the cam rotates and abuts against the front housing of the screening box; and a discharge port is fixedly installed at the bottom of the screening box. The ball bearing can reduce friction when the cam abuts against the screening box housing, thereby extending the service life of the device.
[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0016] This utility model provides a multi-stage screening device for silver paste raw materials used in electronic components. A servo motor drives the main gear to rotate through a transmission belt, which in turn drives the driven gear to rotate. The output end of the driven gear drives the guide roller to rotate at a set speed. The guide grooves around the guide roller evenly receive the silver paste raw materials in the feed hopper. The rotation feeds the raw materials quantitatively and continuously into the top of the screening box. The spiral design of the guide grooves can prevent the raw materials from accumulating and ensure that the feeding speed matches the screening efficiency.
[0017] This utility model provides a multi-stage screening device for silver paste raw materials used in electronic components. By setting up three screens with decreasing aperture sizes, the raw material falls from the feed hopper into the first screen, where larger particles are retained and smaller particles pass through the screen holes into the lower layer. The second screen further filters medium-sized particles, and the third screen retains fine particles that meet the requirements of electronic components, thus achieving three-stage screening. When the main gear rotates, its output end drives the drive rod to make the cam rotate synchronously. The convex end of the cam abuts against the front shell of the screening box through the ball bearings. When the cam rotates, the ball bearings push the screening box to move back and forth along the slide bar of the support bracket, generating vibration and promoting the screening rate. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the screening box structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the guide roller structure of this utility model;
[0021] Figure 4 This is a cross-sectional schematic diagram of the screening box structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the cam structure of this utility model.
[0023] In the diagram: 1. Screening device; 2. Support bracket; 21. Servo motor; 22. Main gear; 221. Drive rod; 222. Cam; 223. Ball bearing; 23. Transmission belt; 24. Driven gear; 25. Guide roller; 26. Guide trough; 3. Feed hopper; 4. Screening box; 41. Discharge port; 42. Screen 1; 43. Screen 2; 44. Screen 3; 45. Slag discharge port. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example
[0025] like Figure 1-5 As shown, this utility model provides a multi-stage screening device for silver paste raw materials for electronic components, including a screening device 1. The screening device 1 includes a support bracket 2. Screening boxes 4 are slidably sleeved on the sliding rods on both sides of the support bracket 2. A feeding hopper 3 is fixedly installed on the top of the support bracket 2. The output end of the feeding hopper 3 extends into the top of the screening box 4. A feeding unit is provided inside the feeding hopper 3. A screening unit is provided inside the screening box 4. The feeding unit includes a guide roller 25 rotatably installed inside the feeding hopper 3. Guide grooves 26 are provided around the circumference of the guide roller 25. A servo motor 21 is fixedly installed on the left side of the support bracket 2. A main gear 22 is fixedly installed on the output end of the servo motor 21. A transmission toothed belt 23 is meshed and sleeved on the outer surface of the main gear 22. A driven gear 24 is meshed and sleeved inside the other end of the transmission toothed belt 23. The output end of the driven gear 24 passes through the feeding hopper 3 and extends into the interior of the guide roller 25.
[0026] Furthermore, the output of the servo motor 21 drives the main gear 22 to rotate the driven gear 24 via the transmission belt 23. The output of the driven gear 24 drives the guide roller 25 to rotate at a set speed. The guide grooves 26 around the guide roller 25 will evenly receive the silver paste raw material in the feed hopper 3. By rotating, the raw material is quantitatively and continuously fed into the top of the screening box 4. The spiral design of the guide groove 26 can avoid the accumulation of raw material and ensure that the feeding speed matches the screening efficiency. Example
[0027] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the screening unit includes a screen 42 fixedly installed at the top of the inner wall of the screening box 4, a screen 43 fixedly installed below the screen 42 on the inner wall of the screening box 4, a screen 44 fixedly installed below the screen 43 on the inner wall of the screening box 4, a slag outlet 45 fixedly installed on the right side of the screening box 4, a drive rod 221 fixedly installed on the output end of the main gear 22, the other end of the drive rod 221 rotatably installed at the front right side of the support bracket 2, a cam 222 fixedly sleeved on the outer surface of the drive rod 221, a ball bearing 223 rotatably installed inside the protruding end of the cam 222, the cam 222 rotatably abuts against the front shell of the screening box 4, and a discharge port 41 fixedly installed at the bottom of the screening box 4.
[0028] Furthermore, the screening box 4 is equipped with three screens in sequence from top to bottom: screen 1 42, screen 2 43, and screen 3 44, with their aperture sizes decreasing in a gradient. The raw material falls from the feed hopper 3 into screen 1 42, where larger particles are trapped, while smaller particles pass through the screen holes and enter the lower layer. Screen 2 43 further filters medium-sized particles, and screen 3 44 traps fine particles that meet the requirements of electronic components, thus achieving three-stage screening. When the main gear 22 rotates, its output end drives the drive rod 221 to cause the cam 222 to rotate synchronously. The protruding end of the cam 222 abuts against the front housing of the screening box 4 through the ball bearing 223. When the cam 222 rotates, the ball bearing 223 pushes the screening box 4 to move back and forth along the slide bar of the support bracket 2, generating vibration and promoting the screening rate.
[0029] The solution uses a PLC as the core control component. The PLC establishes a connection with the servo motor 21 through RS-485 communication. When the servo motor 21 needs to be started, the PLC sends a start command to the servo motor 21 to start it.
[0030] The working principle of the multi-stage screening device for silver paste raw materials used in this electronic component will be explained in detail below.
[0031] like Figure 1-5As shown, during operation, the output of the servo motor 21 drives the main gear 22, which in turn drives the driven gear 24 to rotate via the transmission belt 23. The output of the driven gear 24 drives the guide roller 25 to rotate at a set speed. The guide grooves 26 around the guide roller 25 evenly receive the silver paste raw material in the feed hopper 3. Through rotation, the raw material is quantitatively and continuously fed into the top of the screening box 4. The spiral design of the guide grooves 26 can prevent the raw material from accumulating and ensure that the feeding speed matches the screening efficiency. The screening box 4 is equipped with screen 1 42, screen 2 43, and screen 3 44 from top to bottom, with their aperture decreasing in a gradient. Raw materials fall from the feed hopper 3 into screen 1 42, where larger particles are trapped, while smaller particles pass through the screen holes and enter the lower layer. Screen 2 43 further filters medium-sized particles, and screen 3 44 traps fine particles that meet the requirements of electronic components, thus achieving three-stage screening. When the main gear 22 rotates, its output end drives the drive rod 221 to cause the cam 222 to rotate synchronously. The protruding end of the cam 222 abuts against the front housing of the screening box 4 through the ball bearing 223. When the cam 222 rotates, the ball bearing 223 pushes the screening box 4 to move back and forth along the slide bar of the support bracket 2, generating vibration and promoting the screening rate.
[0032] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A multi-stage screening device for silver paste raw materials for electronic components, comprising a screening device (1), characterized in that: The screening device (1) includes a support bracket (2), on which screening boxes (4) are slidably sleeved on the sliding rods on both sides of the support bracket (2), and a feeding hopper (3) is fixedly installed on the top of the support bracket (2), with the output end of the feeding hopper (3) extending into the top of the screening box (4). The feeding hopper (3) is equipped with a feeding unit inside, and the screening box (4) is equipped with a screening unit inside; The feeding unit includes a guide roller (25) that is rotatably installed inside the feed hopper (3), and guide grooves (26) are provided on all four sides of the guide roller (25).
2. The multi-stage screening device for silver paste raw materials of electronic components according to claim 1, characterized in that: A servo motor (21) is fixedly installed on the left side of the support bracket (2), and a main gear (22) is fixedly installed on the output end of the servo motor (21). A transmission toothed belt (23) is meshed on the outer surface of the main gear (22).
3. The multi-stage screening device for silver paste raw materials of electronic components according to claim 2, characterized in that: The other end of the transmission belt (23) is internally engaged with a driven gear (24), the output end of which passes through the feed hopper (3) and extends inside the guide roller (25).
4. The multi-stage screening device for silver paste raw material of electronic components according to claim 1, characterized in that: The screening unit includes a screen one (42) fixedly installed at the top of the inner wall of the screening box (4), and a screen two (43) fixedly installed below the screen one (42) on the inner wall of the screening box (4).
5. The multi-stage screening device for silver paste raw material of electronic components according to claim 4, characterized in that: The inner wall of the screening box (4) is fixedly installed with screen three (44) below screen two (43), and a slag outlet (45) is fixedly installed on the upper right side of the screening box (4).
6. The multi-stage screening device for silver paste raw materials of electronic components according to claim 2, characterized in that: A drive rod (221) is fixedly installed on the output end of the main gear (22), and the other end of the drive rod (221) is rotatably installed at the front right side of the support bracket (2). A cam (222) is fixedly sleeved on the outer surface of the drive rod (221).
7. The multi-stage screening device for silver paste raw material of electronic components according to claim 6, characterized in that: The cam (222) has a ball bearing (223) rotatably mounted inside its protruding end. The cam (222) rotates and abuts against the front housing of the screening box (4). The screening box (4) has a discharge port (41) fixedly mounted at its bottom end.