Preparation device of flake silver powder for conductive silver paste

Abstract

The utility model relates to a preparation device of flake silver powder for conductive silver paste, which belongs to the technical field of flake silver powder preparation and comprises a screening device for silver powder preparation. The screening device comprises a frame, a screen arranged in the frame, a driving motor fixedly installed outside the frame, a rotating disc fixedly installed on an output shaft of the driving motor and a connecting rod installed between the rotating disc and the screen in a hinged mode, and an elastic guide structure is arranged between the frame and the screen. And a quantity control mechanism is arranged above the frame and comprises a material control box. According to the preparation device of the flaky silver powder for the conductive silver paste, dust collection and screening are synchronously carried out, so that uniform distribution of silver powder particles in the screening process can be ensured, the phenomenon that a screen is blocked due to dust flying is reduced, dust is effectively prevented from being diffused in a workshop, the risk that workers inhale the dust is reduced, and the body health of the workers is protected; and therefore, the beneficial effects that the screening effect is good, and dust generated during screening can be cleaned are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flaky silver powder preparation technical field, concretely is a kind of preparation device for flaky silver powder for conductive silver paste. BACKGROUND

[0002] Flaky silver powder used in silver paste plays an important role in photovoltaic industry. As conductive filler, flaky silver powder has unique advantages in forming conductive path. Compared with spherical silver powder, flaky silver powder is in line contact or surface contact between particles. This contact mode makes flaky silver powder have relatively low resistance. In addition, flaky silver powder has relatively large specific surface area and low surface activation energy, so its oxidation degree and oxidation tendency are also relatively low. At the same time, flaky silver powder also has a wide range of deflection and anti-fracture stretching characteristics, which helps to improve the reliability of electronic components.

[0003] During the preparation of flaky silver powder, sieving is needed. The washed silver powder is dried to remove moisture, and the dried silver powder is sieved to obtain flaky silver powder meeting the requirements. However, during the sieving process, silver powder may produce dust due to vibration, air flow and other factors. These dust not only affects the cleanliness of the operating environment, but also may harm the health of the operator, so a preparation device for flaky silver powder for conductive silver paste is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a preparation device for flaky silver powder for conductive silver paste, which has the advantages of good sieving effect and can clean the dust generated during sieving. The problem of dust generated during sieving of silver powder due to vibration, air flow and other factors, which not only affects the cleanliness of the operating environment, but also may harm the health of the operator, is solved.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a preparation device for flaky silver powder for conductive silver paste, comprising a sieving device for silver powder preparation, the sieving device comprises a frame, a screen set in the frame, a drive motor fixedly installed outside the frame, a rotating disc fixedly installed on the output shaft of the drive motor and a connecting rod hingedly installed between the rotating disc and the screen, and an elastic guide structure is arranged between the frame and the screen;

[0006] A quantity control mechanism is arranged above the frame, the quantity control mechanism comprises a control box, a hopper fixedly communicated with the upper surface of the control box, a rotating shaft rotatably arranged in the control box and a material separation plate fixedly installed outside the rotating shaft;

[0007] The dust suction device is arranged on the material control box and the hopper, and comprises a dust collecting box arranged outside the material control box, a dust suction fan fixedly installed in the dust collecting box and a suction pipe fixedly installed at the top edge of the hopper.

[0008] Further, the elastic guide structure comprises guide rods fixedly installed between the inner walls of the opposite sides of the frame, connecting blocks fixedly installed on the side walls of the screen and slidably sleeved with the guide rods outside, and two springs fixedly installed at the opposite ends of the connecting blocks, and the opposite ends of the two springs are fixed with the inner walls of the opposite sides of the frame respectively.

[0009] Further, the number of the elastic guide structures is two, the two elastic guide structures are arranged on the outer walls of the opposite sides of the screen, and the transmission cooperation of the driving motor, the rotating disc and the connecting rod realizes the material screening.

[0010] Further, the inside of the material control box is provided with a volume cavity and a discharging port, the discharging port is communicated with the volume cavity, the rotating shaft is installed in the volume cavity through a bearing, and one end of the rotating shaft extends to the outside of the material control box.

[0011] Further, the number of the material separating plates is four, the four material separating plates are equidistantly arranged around the rotating shaft, and the volume cavity is arranged to realize the controlled discharging of the silver powder.

[0012] Further, the dust collecting box is provided with a mounting port for mounting the dust suction fan, one side of the dust collecting box opposite to the mounting port is fixedly communicated with a three-way pipe, the number of the suction pipes is two, the two suction pipes are arranged on the hopper and the frame respectively, and the two suction pipes are communicated with the dust collecting box through the three-way pipe.

[0013] Further, the number of the transmission gears and the driven gears is two, the two driven gears are connected with the end of the rotating shaft and the dust suction fan respectively, and the two transmission gears are arranged above and below the connecting shaft and are fixedly installed outside the connecting shaft and are engaged with the two driven gears respectively.

[0014] Compared with the prior art, the preparation device for flaky silver powder of conductive silver paste has the following beneficial effects:

[0015] 1. The device for preparing flaky silver powder for conductive silver paste, by synchronously operating dust collection and screening, uniform distribution of silver powder particles in the screening process can be ensured, the phenomenon of screen clogging caused by dust flying is reduced, the screening efficiency and precision are improved, dust generated in the screening process can be collected in time, the spread of dust in the workshop is effectively prevented, the risk of workers inhaling dust is reduced, and the health of workers is protected, so that the advantages of good screening effect and dust generated in screening can be cleaned are achieved, and the problems that silver powder may generate dust due to vibration, airflow and other factors in the screening process, which not only affects the cleanliness of the operating environment, but also may cause harm to the health of the operator are solved.

[0016] 2. The device for preparing flaky silver powder for conductive silver paste, by the transmission cooperation of the driving gear and the driven gear, the driving of the rotating shaft is realized, the rotating shaft rotates to control the material through the four equidistantly arranged material separation plates, and since the space formed between the adjacent two material separation plates and the volume cavity is always consistent, the material entering the frame is always the same, so that the material control is realized, and it is ensured that the screen can uniformly screen the powder. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sectional view of the structure of the utility model;

[0018] Figure 2 It is a structural schematic view of the screen;

[0019] Figure 3 It is an enlarged structural schematic view of A shown in the utility model; Figure 2

[0020] Figure 4 It is a sectional view of the material control box of the utility model.

[0021] In the drawing: 1, frame; 2, screen; 3, material control box; 4, hopper; 5, connecting block; 6, guide rod; 7, spring; 8, driving motor; 9, rotating disc; 10, connecting rod; 11, volume cavity; 12, rotating shaft; 13, material separation plate; 14, discharge port; 15, dust collection box; 16, dust collection fan; 17, suction pipe; 18, connecting shaft; 19, driving gear; 20, driven gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] ​Embodiment one:

[0024] Please refer to Figures 1 to 3 A kind of preparation device of flaky silver powder for conductive silver paste, including the screening device for silver powder preparation, screening device includes frame 1, screen 2 being arranged in the frame 1 inside, fixedly installed in the drive motor 8 outside frame 1, rotating disc 9 being fixedly installed on the output shaft of drive motor 8 and articulatedly installed connecting rod 10 between screen 2 and rotating disc 9, elastic guide structure is arranged between frame 1 and screen 2;Elastic guide structure includes guide rod 6 being fixedly installed between the inner wall of opposite side of frame 1, connecting block 5 being fixedly installed on the side wall of screen 2 and slidingly sleeved on the outside of guide rod 6 and two springs 7 being fixedly installed on the apart end of connecting block 5, and the apart end of two springs 7 is fixed with the inner wall of opposite side of frame 1 respectively.

[0025] Specifically, the number of elastic guide structure is two, two elastic guide structures are arranged on the outer wall of opposite side of screen 2, and the transmission cooperation of drive motor 8, rotating disc 9 and connecting rod 10 realizes material screening.Frame 1 is connected in communication, and the lower surface of frame 1 is welded with support leg, for being installed above the collection equipment.Frame 1 is provided with movable opening for the rotation of connecting rod 10.

[0026] Embodiment two:

[0027] Please refer to Figure 1 And Figure 4 On the basis of embodiment one, control mechanism is arranged above frame 1, and control mechanism includes control box 3, hopper 4 being fixedly connected to the upper surface of control box 3, rotating shaft 12 being rotatably arranged in the inside of control box 3 and spacing plate 13 being fixedly installed on the outside of rotating shaft 12;The inside of control box 3 is provided with volume cavity 11 and discharge port 14, and discharge port 14 is in communication with volume cavity 11, rotating shaft 12 is installed in volume cavity 11 by bearing, and one end of rotating shaft 12 extends to the outside of control box 3.

[0028] Specifically, the number of spacing plate 13 is four, and four spacing plates 13 are equidistantly arranged around rotating shaft 12, which realizes the controlled feeding of silver powder in cooperation with the arrangement of volume cavity 11.The lower surface of control box 3 is welded with support frame being fixed on the upper surface of frame 1.

[0029] In order to improve processing environment, in the present example, as Figure 1As shown, the control material box 3 and the hopper 4 are provided with dust suction devices, the dust suction devices include a dust collecting box 15 provided outside the control material box 3, a dust suction fan 16 fixedly installed in the dust collecting box 15, and a suction pipe 17 fixedly installed at the top edge of the hopper 4, the rotating disc 9 is provided with a linkage structure connected with the control mechanism and the dust suction device, the linkage structure is composed of a connecting shaft 18, a transmission gear 19 and a driven gear 20. The dust collecting box 15 is provided with a mounting port for mounting the dust suction fan 16, and a three-way pipe is fixedly communicated with one side of the dust collecting box 15 relative to the mounting port, the number of the suction pipes 17 is two, and the two suction pipes 17 are arranged on the hopper 4 and the frame 1 respectively, and the two suction pipes 17 are communicated with the dust collecting box 15 through the three-way pipe.

[0030] It should be noted that the number of the transmission gear 19 and the driven gear 20 is two, and the two driven gears 20 are connected with the end of the rotating shaft 12 and the dust suction fan 16 respectively, and the two transmission gears 19 are arranged fixedly on the outside of the connecting shaft 18 and are engaged with the two driven gears 20 respectively.

[0031] By using the transmission cooperation of the transmission gear 19 and the driven gear 20, the rotating shaft 12 and the dust suction fan 16 are driven, the rotating shaft 12 rotates to control the material through the four equidistantly arranged material separating plates 13, so that the screen 2 can uniformly screen the powder, and the dust suction fan 16 can form negative pressure in the dust collecting box 15, and the generated dust is sucked away in time through the adsorption of the two suction pipes 17, so that the operating environment is kept clean and the health of the operator is protected.

[0032] The working principle of the above embodiment is as follows:

[0033] When the flaky silver powder is screened, the powder enters the control material box 3 through the hopper 4, the driving motor 8 is started, the transmission cooperation of the transmission gear 19 and the driven gear 20 is used to drive the rotating shaft 12 and the dust suction fan 16, the rotating shaft 12 rotates to control the material through the four equidistantly arranged material separating plates 13, the space between the adjacent two material separating plates 13 and the volume cavity 11 is always kept consistent, so that the amount of the material entering the frame 1 is always the same, thereby realizing the control of the material, ensuring that the screen 2 can uniformly screen the powder, and the dust suction fan 16 can form negative pressure in the dust collecting box 15, and the generated dust is sucked away in time through the adsorption of the two suction pipes 17, so that the operating environment is kept clean and the health of the operator is protected.

[0034] The mounting mode, the connecting mode or the setting mode disclosed in the embodiment are all common mechanical connecting modes, and can be implemented as long as the beneficial effects can be achieved, in addition, the electrical components appearing in the embodiment are all electrically connected with the master controller and the power supply, the master controller can be a conventional known device such as a computer which plays a control role, the control of the electrical components can be realized by simple programming by the person skilled in the art, and the existing disclosed power connection technology also belongs to the common knowledge in the art, therefore, the specific structure composition and working principle of the embodiment will not be described too much.

[0035] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for producing flaky silver powder for conductive silver paste, comprising a sieving device for producing silver powder, characterized in that: The screening device comprises a frame (1), a screen (2) arranged inside the frame (1), a driving motor (8) fixedly installed outside the frame (1), a rotating disc (9) fixedly installed on an output shaft of the driving motor (8), and a connecting rod (10) hingedly installed between the rotating disc (9) and the screen (2), and an elastic guide structure is arranged between the frame (1) and the screen (2); A quantity control mechanism is arranged above the frame (1), the quantity control mechanism comprises a control box (3), a hopper (4) fixedly communicated with an upper surface of the control box (3), a rotating shaft (12) rotatably arranged inside the control box (3), and a material separation plate (13) fixedly installed outside the rotating shaft (12); A dust suction device is arranged on the control box (3) and the hopper (4), the dust suction device comprises a dust collecting box (15) arranged outside the control box (3), a dust suction fan (16) fixedly installed in the dust collecting box (15), and a suction pipe (17) fixedly installed at an edge of a top end of the hopper (4), a linkage structure connected with the quantity control mechanism and the dust suction device is installed on the rotating disc (9), and the linkage structure comprises a connecting shaft (18), a transmission gear (19), and a driven gear (20).

2. The device for preparing flaky silver powder for conductive silver paste according to claim 1, characterized in that: The elastic guide structure comprises guide rods (6) fixedly installed between inner walls of opposite sides of the frame (1), connecting blocks (5) fixedly installed on side walls of the screen (2) and slidably sleeved outside the guide rods (6), and two springs (7) fixedly installed at opposite ends of the connecting blocks (5), and the opposite ends of the two springs (7) are fixed to the inner walls of the opposite sides of the frame (1).

3. The device for preparing flaky silver powder for conductive silver paste according to claim 1, characterized in that: The number of the elastic guide structures is two, the two elastic guide structures are arranged on opposite outer walls of the screen (2), and the transmission cooperation of the driving motor (8), the rotating disc (9), and the connecting rod (10) realizes material screening.

4. The device for preparing flaky silver powder for conductive silver paste according to claim 1, characterized in that: A volume cavity (11) and a discharging port (14) are formed in the control box (3), the discharging port (14) is communicated with the volume cavity (11), the rotating shaft (12) is installed in the volume cavity (11) through a bearing, and one end of the rotating shaft (12) extends to outside of the control box (3).

5. The device for preparing flaky silver powder for conductive silver paste according to claim 4, characterized in that: The number of the material separation plates (13) is four, the four material separation plates (13) are equidistantly arranged around the rotating shaft (12), and the arrangement of the volume cavity (11) realizes the controlled discharging of the silver powder.

6. The device for preparing flaky silver powder for conductive silver paste according to claim 1, characterized in that: An installation port for the dust suction fan (16) is formed in the dust collecting box (15), a three-way pipe is fixedly and communicatively arranged on one side of the dust collecting box (15) relative to the installation port, the number of the suction pipes (17) is two, the two suction pipes (17) are arranged on the hopper (4) and the frame (1) respectively, and the two suction pipes (17) are communicated with the dust collecting box (15) through the three-way pipe.

7. The device for preparing flaky silver powder for conductive silver paste according to claim 1, characterized in that: The number of the transmission gears (19) and the driven gears (20) is two, the two driven gears (20) are connected with the end of the rotating shaft (12) and the dust suction fan (16) respectively, and the two transmission gears (19) are fixedly installed outside the connecting shaft (18) and meshed with the two driven gears (20) respectively.

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