Tin powder sieving structure in soldering paste production process

Abstract

The utility model provides a tin powder sieving structure in the soldering paste production process, and relates to the technical field of soldering paste production, the tin powder sieving structure comprises a sieving mechanism, the sieving mechanism comprises supporting legs, the upper parts of the supporting legs are fixedly connected with a first connecting plate, and the upper part of the first connecting plate is fixedly connected with a fixing frame; the upper portion of the fixing frame is fixedly connected with a telescopic rod, and the upper portion of the telescopic rod is fixedly connected with a second connecting plate. According to the tin powder screening device, tin powder is subjected to primary screening through the first screening plate, the tin powder with the overlarge particle size can block filtering holes of the first screening plate, in the up-down vibration process of the screening box, the first screening plate can do up-down reciprocating motion, under the fixing and limiting effects of the fixing rods, the connecting frame is limited, the position of the connecting frame is kept unchanged, and the screening effect is improved. When the first sieve plate reciprocates up and down, the filter holes in the surface of the first sieve plate are dredged through the dredging rods on the upper portion of the connecting frame, and the first sieve plate is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of solder paste production and processing, in particular to a tin powder screening structure in the solder paste production process. Background Art

[0002] In the production process of solder paste, tin powder screening is an important process to ensure the uniform particle size of the tin powder and remove impurities and tin powder with too large particles to improve the welding effect and product quality.

[0003] In the prior art, for example, Chinese patent announcement number: CN219785586U discloses "a tin powder screening structure in a solder paste production process", comprising: a top frame; a fixed frame, the fixed frame is fixedly mounted on the inner side surface of the top frame, a filter plate is fixedly mounted on the inner side surface of the fixed frame, a first filter hole is opened inside one end of the filter plate, and a second filter hole is opened inside the other end of the filter plate; and limiting grooves, the limiting grooves are respectively opened on both sides of the inner side surface of the fixed frame.

[0004] However, in the prior art, the tin powder screening structure adopts two-stage, three-stage or even multiple-stage screening screens to screen tin powders of different particle sizes. However, in the first-stage screening process, there is often a portion of large-particle tin powder that exceeds the filter hole diameter of the filter screen. Such large-particle tin powder is easy to clog the first-stage filter screen, causing difficulty in feeding, affecting subsequent screening operations, and reducing the screening efficiency of the tin powder screening structure. Utility Model Content

[0005] The utility model mainly provides a tin powder sieving structure in the production process of solder paste, which can prevent blockage and conveniently improve filtering efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tin powder screening structure in the production process of solder paste, comprising a screening mechanism, the screening mechanism comprising a supporting leg, a No. 1 connecting plate is fixedly connected to the upper part of the supporting leg, a fixing frame is fixedly connected to the upper part of the No. 1 connecting plate, a telescopic rod is fixedly connected to the upper part of the fixing frame, a No. 2 connecting plate is fixedly connected to the upper part of the telescopic rod, a spring is arranged on the surface of the telescopic rod, one end of the spring is fixedly connected to the fixing frame, and the other end of the spring is fixedly connected to the No. 2 connecting plate, and a screening box is fixedly connected to the surface of the No. 2 connecting plate;

[0007] An anti-blocking mechanism is fixedly connected to the surface of the screening mechanism, and the anti-blocking mechanism includes a fixed rod, which is fixedly connected to the upper part of the No. 1 connecting plate, and a No. 2 fixing plate is fixedly connected to the top of the fixed rod, and a connecting frame is fixedly connected to one end of the No. 2 fixing plate, a dredging rod is fixedly connected to the upper part of the connecting frame, and a material discharge trough is arranged on the surface of the connecting frame.

[0008] Preferably, a No. 1 fixing plate is fixedly connected to the side of the screening box, and a vibration motor is fixedly connected to the upper part of the No. 1 fixing plate, so that the screening box can be driven to vibrate by the vibration motor.

[0009] Preferably, a feed pipe is fixedly connected to the top of the screening box, and a discharge pipe is fixedly connected to the bottom of the screening box, through which tin powder with the smallest particle size can be discharged.

[0010] Preferably, a No. 1 sieve plate is fixedly connected to the inside of the screening box, a No. 2 sieve plate is arranged below the No. 1 sieve plate, the No. 2 sieve plate is fixedly connected to the inside of the screening box, the filtering aperture of the No. 2 sieve plate is smaller than the filtering aperture of the No. 1 sieve plate, and the tin powder is subjected to one and two levels of screening by the No. 1 sieve plate and the No. 2 sieve plate.

[0011] Preferably, a No. 3 sieve plate is arranged below the No. 2 sieve plate, the No. 3 sieve plate is fixedly connected to the inside of the screening box, and the filtering aperture of the No. 3 sieve plate is smaller than the filtering aperture of the No. 2 sieve plate, and the tin powder is subjected to third and fourth level screening through the No. 3 sieve plate.

[0012] Preferably, a No. 1 discharge hopper is fixedly connected to the surface of the screening box, and the No. 1 discharge hopper is located on one side of the No. 1 sieve plate; a No. 2 discharge hopper is fixedly connected to the surface of the screening box, and the No. 2 discharge hopper is located on one side of the No. 2 sieve plate; a No. 3 discharge hopper is fixedly connected to the surface of the screening box, and the No. 3 discharge hopper is located on one side of the No. 3 sieve plate, so that the screened tin powder can be processed conveniently through the No. 1 discharge hopper, the No. 2 discharge hopper and the No. 3 discharge hopper.

[0013] Preferably, a through groove is provided on the side of the screening box, and the No. 2 fixed plate passes through the surface of the screening box through the through groove. A sealing rubber pad is fixedly connected to the surface of the No. 2 fixed plate. The sealing rubber pad is located inside the through groove and fixedly connected to the screening box. The sealing rubber pad prevents leakage of tin powder during the filtration process.

[0014] Preferably, the dredging rod is located at the lower part of the filter holes on the surface of the No. 1 sieve plate, and the diameter of the dredging rod is smaller than the aperture of the filter holes on the surface of the No. 1 sieve plate, so that the clogged No. 1 sieve plate can be dredged easily by the dredging rod.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. In the utility model, tin powder to be screened is added into the screening box through a feed pipe, and then the vibration motor is started to drive the No. 1 fixed plate and the screening box to vibrate, so as to screen the tin powder. The No. 1 sieve plate performs primary screening on the tin powder, and tin powder with too large particle size will block the filter holes of the No. 1 sieve plate. During the up and down vibration of the screening box, the No. 1 sieve plate will reciprocate up and down. Under the fixed limiting action of the fixed rod, the connecting frame is limited to keep the connecting frame in position. When the No. 1 sieve plate reciprocates up and down, the filter holes on the surface of the No. 1 sieve plate are dredged through the dredging rod on the upper part of the connecting frame to avoid the No. 1 sieve plate being blocked.

[0017] 2. In the utility model, the tin powder after primary filtration falls onto the surface of the second sieve plate, and the second sieve plate performs secondary filtration on the tin powder, which is convenient for re-screening the tin powder. Similarly, the tin powder screened by the second sieve plate reaches the surface of the third sieve plate for re-screening, which is convenient for rapid multi-stage screening of the tin powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a tin powder sieving structure in the production process of solder paste is proposed for the utility model;

[0019] Figure 2 A side view of a tin powder sieving structure in a solder paste production process is provided for the utility model;

[0020] Figure 3 The utility model provides a schematic diagram of the internal structure of a screening box in a tin powder screening structure in a solder paste production process;

[0021] Figure 4 The utility model provides a side structural schematic diagram of a middle dredging rod of a tin powder sieving structure in a solder paste production process.

[0022] Legend: 1. Screening mechanism; 11. Support legs; 12. Connecting plate No. 1; 13. Fixed frame; 14. Telescopic rod; 15. Spring; 16. Connecting plate No. 2; 17. Screening box; 18. Feed pipe; 19. Fixed plate No. 1; 110. Vibrating motor; 111. Discharge hopper No. 1; 112. Discharge hopper No. 2; 113. Discharge hopper No. 3; 114. Discharge pipe; 115. Sieve plate No. 1; 116. Sieve plate No. 2; 117. Sieve plate No. 3; 2. Anti-blocking mechanism; 21. Fixed rod; 22. Fixed plate No. 2; 23. Sealing rubber pad; 24. Connecting frame; 25. Clearing rod; 26. Discharge chute. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a tin powder screening structure in the process of solder paste production, comprising a screening mechanism 1, the screening mechanism 1 comprising a supporting leg 11, a No. 1 connecting plate 12 is fixedly connected to the upper part of the supporting leg 11, a fixing frame 13 is fixedly connected to the upper part of the No. 1 connecting plate 12, a telescopic rod 14 is fixedly connected to the upper part of the fixing frame 13, a No. 2 connecting plate 16 is fixedly connected to the upper part of the telescopic rod 14, a spring 15 is arranged on the surface of the telescopic rod 14, one end of the spring 15 is fixedly connected to the fixing frame 13, and the other end of the spring 15 is fixedly connected to the No. 2 connecting plate 16, and a screening box 17 is fixedly connected to the surface of the No. 2 connecting plate 16;

[0026] An anti-blocking mechanism 2 is fixedly connected to the surface of the screening mechanism 1, and the anti-blocking mechanism 2 includes a fixed rod 21, which is fixedly connected to the upper part of the No. 1 connecting plate 12, and a No. 2 fixing plate 22 is fixedly connected to the top of the fixed rod 21, a connecting frame 24 is fixedly connected to one end of the No. 2 fixing plate 22, a clearing rod 25 is fixedly connected to the upper part of the connecting frame 24, and a discharge trough 26 is arranged on the surface of the connecting frame 24.

[0027] The tin powder to be screened is added into the screening box 17 through the feed pipe 18, and then the vibration motor 110 is started to drive the No. 1 fixed plate 19 and the screening box 17 to vibrate, so as to screen the tin powder, and the No. 1 sieve plate 115 is used for primary screening of the tin powder. The tin powder with too large particle size will block the filter holes of the No. 1 sieve plate 115. During the up and down vibration of the screening box 17, the No. 1 sieve plate 115 will reciprocate up and down. Under the fixed limiting action of the fixed rod 21, the connecting frame 24 is limited to keep the connecting frame 24 in position. When the No. 1 sieve plate 115 reciprocates up and down, the filter holes on the surface of the No. 1 sieve plate 115 are dredged through the dredging rod 25 on the upper part of the connecting frame 24 to avoid the No. 1 sieve plate 115 being blocked, and the tin powder with too large particle size is discharged from the No. 1 discharge hopper 111 end through the vibration.

[0028] like Figure 1As shown, a fixing plate No. 19 is fixedly connected to the side of the screening box 17, and a vibration motor 110 is fixedly connected to the upper part of the fixing plate No. 19, so that the screening box 17 can be driven to vibrate by the vibration motor 110.

[0029] like Figure 2 As shown, a feed pipe 18 is fixedly connected to the top of the screening box 17, and a discharge pipe 114 is fixedly connected to the bottom of the screening box 17, through which the tin powder with the smallest particle size can be discharged.

[0030] like Figure 3 As shown, a No. 1 sieve plate 115 is fixedly connected to the inside of the screening box 17, a No. 2 sieve plate 116 is arranged below the No. 1 sieve plate 115, the No. 2 sieve plate 116 is fixedly connected to the inside of the screening box 17, the filtering aperture of the No. 2 sieve plate 116 is smaller than the filtering aperture of the No. 1 sieve plate 115, and the tin powder is subjected to one and two stage screening by the No. 1 sieve plate 115 and the No. 2 sieve plate 116.

[0031] like Figure 3 As shown, a No. 3 sieve plate 117 is arranged below the No. 2 sieve plate 116. The No. 3 sieve plate 117 is fixedly connected to the inside of the screening box 17, and the filtering aperture of the No. 3 sieve plate 117 is smaller than the filtering aperture of the No. 2 sieve plate 116. The No. 3 sieve plate 117 is used to perform third-level and fourth-level screening of tin powder.

[0032] like Figure 3 As shown, a No. 1 discharge hopper 111 is fixedly connected to the surface of the screening box 17, and the No. 1 discharge hopper 111 is located on the side of the No. 1 sieve plate 115; a No. 2 discharge hopper 112 is fixedly connected to the surface of the screening box 17, and the No. 2 discharge hopper 112 is located on the side of the No. 2 sieve plate 116; a No. 3 discharge hopper 113 is fixedly connected to the surface of the screening box 17, and the No. 3 discharge hopper 113 is located on the side of the No. 3 sieve plate 117. The No. 1 discharge hopper 111, the No. 2 discharge hopper 112 and the No. 3 discharge hopper 113 facilitate the processing of the screened tin powder.

[0033] like Figure 3 As shown, a through groove is provided on the side of the screening box 17, and the No. 2 fixing plate 22 passes through the surface of the screening box 17 through the through groove. A sealing rubber pad 23 is fixedly connected to the surface of the No. 2 fixing plate 22. The sealing rubber pad 23 is located inside the through groove and fixedly connected to the screening box 17. The sealing rubber pad 23 prevents leakage of tin powder during the filtering process.

[0034] like Figure 3 As shown, the dredging rod 25 is located at the lower part of the filter hole on the surface of the No. 1 sieve plate 115, and the diameter of the dredging rod 25 is smaller than the aperture of the filter hole on the surface of the No. 1 sieve plate 115. The dredging rod 25 is used to facilitate dredging of the clogged No. 1 sieve plate 115.

[0035] The method of using the device and the working principle are as follows: the tin powder to be screened is added into the screening box 17 through the feed pipe 18, and then the vibration motor 110 is started to drive the No. 1 fixed plate 19 and the screening box 17 to vibrate, so as to screen the tin powder, and the No. 1 sieve plate 115 is used to perform primary screening on the tin powder, and the tin powder with too large particle size will block the filter holes of the No. 1 sieve plate 115. During the up and down vibration process of the screening box 17, the No. 1 sieve plate 115 will reciprocate up and down, and under the fixed limiting action of the fixed rod 21, the connecting frame 24 is limited to keep the connecting frame 24 in position. When the No. 1 sieve plate 115 reciprocates up and down, the dredging rod 25 on the upper part of the connecting frame 24 is used to dredge the filter holes on the surface of the No. 1 sieve plate 115 to avoid the No. 1 sieve plate 115 being blocked, and the tin powder with too large particle size is discharged from the No. 1 discharge hopper 111 end through the vibration action;

[0036] The tin powder after primary filtration falls onto the surface of the second sieve plate 116, and is subjected to secondary filtration by the second sieve plate 116, so as to facilitate re-screening of the tin powder. Similarly, the tin powder screened by the second sieve plate 116 reaches the surface of the third sieve plate 117 for re-screening.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A tin powder screening structure in the production process of solder paste, characterized in that: The screening mechanism (1) comprises a supporting leg (11), a first connecting plate (12) being fixedly connected to the upper portion of the supporting leg (11), a fixing frame (13) being fixedly connected to the upper portion of the first connecting plate (12), a telescopic rod (14) being fixedly connected to the upper portion of the fixing frame (13), a second connecting plate (16) being fixedly connected to the upper portion of the telescopic rod (14), a spring (15) being arranged on the surface of the telescopic rod (14), one end of the spring (15) being fixedly connected to the fixing frame (13), and the other end of the spring (15) being fixedly connected to the second connecting plate (16), and a screening box (17) being fixedly connected to the surface of the second connecting plate (16); The surface of the screening mechanism (1) is fixedly connected with an anti-blocking mechanism (2), the anti-blocking mechanism (2) comprises a fixing rod (21), the fixing rod (21) is fixedly connected to the upper part of a No. 1 connecting plate (12), and the top of the fixing rod (21) is fixedly connected to a No. 2 fixing plate (22), one end of the No. 2 fixing plate (22) is fixedly connected to a connecting frame (24), the upper part of the connecting frame (24) is fixedly connected with a dredging rod (25), and a material discharge trough (26) is provided on the surface of the connecting frame (24).

2. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: A first fixing plate (19) is fixedly connected to the side of the screening box (17), and a vibration motor (110) is fixedly connected to the top of the first fixing plate (19).

3. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: The top of the screening box (17) is fixedly connected to a feed pipe (18), and the bottom of the screening box (17) is fixedly connected to a discharge pipe (114).

4. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: A first sieve plate (115) is fixedly connected to the interior of the screening box (17), a second sieve plate (116) is arranged below the first sieve plate (115), the second sieve plate (116) is fixedly connected to the interior of the screening box (17), and the filtering aperture of the second sieve plate (116) is smaller than the filtering aperture of the first sieve plate (115).

5. The tin powder screening structure in the solder paste production process according to claim 4, characterized in that: A third sieve plate (117) is arranged below the second sieve plate (116), the third sieve plate (117) is fixedly connected to the inside of the screening box (17), and the filtering aperture of the third sieve plate (117) is smaller than the filtering aperture of the second sieve plate (116).

6. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: A first discharge hopper (111) is fixedly connected to the surface of the screening box (17), and the first discharge hopper (111) is located on one side of a first sieve plate (115). A second discharge hopper (112) is fixedly connected to the surface of the screening box (17), and the second discharge hopper (112) is located on one side of a second sieve plate (116). A third discharge hopper (113) is fixedly connected to the surface of the screening box (17), and the third discharge hopper (113) is located on one side of a third sieve plate (117).

7. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: A through slot is provided on the side of the screening box (17), and the second fixing plate (22) passes through the surface of the screening box (17) through the through slot. A sealing rubber pad (23) is fixedly connected to the surface of the second fixing plate (22), and the sealing rubber pad (23) is located inside the through slot and fixedly connected to the screening box (17).

8. The tin powder screening structure in the solder paste production process according to claim 1, characterized in that: The dredging rod (25) is located at the lower part of the filtering holes on the surface of the first sieve plate (115), and the diameter of the dredging rod (25) is smaller than the aperture of the filtering holes on the surface of the first sieve plate (115).

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