Silver paste defoaming device

Abstract

The utility model discloses a kind of silver paste defoaming devices, comprising: bucket body, vacuum pump, bucket cover, defoaming mechanism, agitating mechanism;The defoaming mechanism includes: fixed in the lifting mechanism of bucket cover;With the connecting rod of lifting mechanism power output end transmission connection;It is set in connecting rod side, and the sleeve ring of agitating mechanism rotating shaft is set and is rotatably connected with rotating shaft;Multiple fixed in sleeve ring, and the defoaming plate of radial vertical setting;The defoaming plate is equipped with filter hole, and the plate surface of the defoaming plate towards silver paste is equipped with defoaming needle I.The utility model provides a kind of silver paste defoaming device, by setting the defoaming plate of radial vertical setting, improve defoaming efficiency under the condition that silver paste is rotated and agitated in bucket, lifting mechanism is driven simultaneously to set defoaming plate to lift, to adapt to silver paste liquid level height, while ensuring that defoaming plate is fully contacted with silver paste in bucket to defoam, reduce silver paste flow rate at liquid level, avoid liquid level suction and other phenomena to produce new bubble.

Description

Technical Field

[0001] This utility model relates to the field of silver paste technology. More specifically, this utility model relates to a silver paste defoaming device. Background Technology

[0002] Silver paste is a conductive paste containing silver particles, widely used in the electronics and information industry. During its preparation, stirring and solvent evaporation can easily introduce air bubbles, affecting printing accuracy and performance. Therefore, defoaming treatment is necessary. Proper defoaming ensures the smoothness and conductivity of the silver paste coating, a crucial step in guaranteeing the performance stability of electronic devices. Existing defoaming devices typically use vacuum defoaming equipment to vacuum-stir the conductive silver paste under vacuum conditions. For example, utility model patent CN202307326U discloses a vacuum defoaming device for conductive silver paste used in touchscreens. However, during the stirring process, new air bubbles are easily generated due to surface entrapment. To address the problem of new air bubble generation, utility model patent CN220939243U discloses a defoaming device used in touchscreen production, comprising: a barrel body, with a defoaming mechanism inside the barrel body. The defoaming mechanism includes an electric telescopic rod, a circular plate fixedly fitted at the bottom of the electric telescopic rod, a set of filter holes on the surface of the circular plate, and a set of spikes at the bottom of the circular plate. This device dissolves and breaks bubbles by physical extrusion, avoiding the generation of new bubbles due to stirring of the silver paste. However, this method of dissolving bubbles by physical extrusion is inefficient, and when the silver paste is not flowing, the defoaming mechanism cannot reach all of the silver paste, which can easily lead to incomplete bubble dissolution. Summary of the Invention

[0003] One object of this invention is to solve the above-mentioned problems and / or defects, and to provide the advantages that will be described later.

[0004] To achieve these objectives and other advantages of this utility model, a silver paste defoaming device is provided, comprising: a barrel body, a vacuum pump, a barrel cover disposed on the top of the barrel body, and a defoaming mechanism disposed within the barrel body. The barrel cover is provided with a feed inlet and an air extraction port connected to the vacuum pump, and the bottom of the barrel body is provided with a discharge outlet. The device also includes: a stirring mechanism disposed within the barrel body.

[0005] The defoaming mechanism includes: a lifting mechanism fixed to the bucket lid;

[0006] The connecting rod that is transmitted to the power output end of the lifting mechanism;

[0007] A collar is provided on one side of the connecting rod and is sleeved on the rotating shaft of the stirring mechanism and rotatably connected to the rotating shaft;

[0008] Multiple defoaming plates fixed to the collar and arranged vertically in a radial pattern;

[0009] The defoaming plate is provided with filter holes, and the surface of the defoaming plate facing the silver paste is provided with defoaming needles I.

[0010] Preferably, the agitation mechanism includes a motor fixed to the bucket lid;

[0011] A rotating shaft located at the motor's power output end and extending into the barrel body;

[0012] Agitator blades located at the end of the rotating shaft.

[0013] Preferably, the collar is configured as a cone shape with a larger upper part and a smaller lower part, and its surface is provided with defoaming needles II.

[0014] Preferably, the defoaming mechanism further includes a support frame arranged around the inner wall of the barrel;

[0015] The bracket is fixed to the defoaming board on the inside, and the bracket is provided with a scraper on the outside that is adapted to the inner wall of the barrel.

[0016] Preferably, the defoaming plate is configured to slope downwards from the side wall of the barrel to the center.

[0017] This utility model has at least the following beneficial effects: by setting up defoaming plates arranged radially and vertically, the defoaming efficiency is improved when the silver paste is rotated and stirred in the tank. At the same time, a lifting mechanism is set up to drive the defoaming plates to rise and fall, so as to adapt to the height of the silver paste liquid level and ensure that the flow point of the silver paste liquid level is in full contact with the defoaming plates for defoaming treatment. While ensuring that the defoaming plates are in full contact with the silver paste in the tank for defoaming, the flow rate of the silver paste at the liquid level is reduced, avoiding phenomena such as liquid surface entrainment that generate new bubbles, and further improving the quality of bubble dissolution.

[0018] Other advantages, objectives and features of this invention will be apparent in part from the description which follows, and in part from the understanding of those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the silver paste defoaming device in one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the silver paste defoaming device in one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the defoaming mechanism of the silver paste defoaming device in one embodiment of the present invention.

[0022] The markings in the diagram are: 1. Barrel body, 11. Discharge port, 2. Barrel lid, 21. Feed port, 22. Air extraction port, 3. Defoaming mechanism, 31. Lifting mechanism, 32. Connecting rod, 33. Defoaming plate, 34. Collar, 35. Support, 36. Scraper, 4. Agitating mechanism, 41. Motor, 42. Rotating shaft, 43. Agitating blade. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not list the presence or addition of one or more other elements or combinations thereof.

[0025] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] Example 1

[0029] A silver paste defoaming device, the structure of which is as follows: Figure 1-3As shown, it includes: a barrel body 1, a vacuum pump, a barrel cover 2 disposed on the top of the barrel body 1, and a defoaming mechanism 3 disposed inside the barrel body 1. The barrel cover 2 is provided with a feed inlet 21 and an air extraction port 22 connected to the vacuum pump. The bottom of the barrel body 1 is provided with a discharge port 11. It also includes: a stirring mechanism 4 disposed inside the barrel body 1.

[0030] The defoaming mechanism 3 includes: a lifting mechanism 31 fixed to the bucket lid 2;

[0031] Linkage 32 is connected to the power output end of lifting mechanism 31;

[0032] A collar 34 is provided on one side of the connecting rod 32 and is sleeved on the rotating shaft 42 of the stirring mechanism 4 and rotatably connected to the rotating shaft 42;

[0033] Multiple defoaming plates 33 are fixed to the collar 34 and arranged radially vertically;

[0034] The defoaming plate 33 is provided with filter holes, and the surface of the defoaming plate 33 facing the silver paste is provided with defoaming needles I.

[0035] In practical applications, the defoaming boards 33 are configured as five pieces, and they are evenly arranged around the axis of the barrel 1 inside the barrel body 1. The lifting mechanism 31 is configured as a cylinder, and the extension rod of the cylinder passes through the barrel cover 2 and is connected to the connecting rod 32.

[0036] Working principle: During operation, silver paste is first injected into tank 1. Then, a vacuum environment is created in tank 1 using a vacuum pump. The stirring mechanism 4 is then activated to agitate the silver paste, causing air bubbles to break due to shear and impact forces. The silver paste then impacts the defoaming plate 33 at the surface to defoam. The flow rate of the silver paste is reduced as it passes through the filter holes to prevent the rapid flow from drawing in air from the surface, which could lead to the formation of new bubbles and insufficient defoaming. A lifting mechanism 31 adjusts the height of the defoaming mechanism 3 to adapt to the height of the injected silver paste, ensuring that the defoaming plate 33 is always aligned with the silver paste surface, guaranteeing good defoaming effects for different injection volumes.

[0037] By setting up an agitation mechanism 4 and a defoaming plate 33 positioned perpendicular to the flow direction of the silver paste, the defoaming efficiency is improved when the silver paste is rotated and agitated inside the tank. At the same time, the surface of the silver paste is in full contact with the defoaming plate 33 for defoaming treatment. While ensuring that the defoaming plate 33 is in full contact with the silver paste in the tank, the flow rate of the silver paste at the surface is reduced to avoid phenomena such as surface entrapment that generate new bubbles, thereby further improving the quality of bubble dissolution.

[0038] Example 2

[0039] This second embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 2As shown, based on embodiment 1, it discloses the following improvement: the stirring mechanism 4 includes: a motor 41 fixed to the bucket lid 2;

[0040] A rotating shaft 42 is installed at the power output end of the motor 41 and extends into the barrel 1;

[0041] Agitator blade 43 is located at the end of the rotating shaft 42.

[0042] Working principle: The stirring blade 43 is located below the defoaming mechanism 3, and stirs the silver paste outward and upward to collide with the side wall of the barrel 1 and the defoaming plate 33 to defoam.

[0043] Example 3

[0044] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 2-3 As shown, based on embodiment 1, the following improvement is disclosed: the collar 34 is configured as a cone shape with a larger upper part and a smaller lower part, and its surface is provided with defoaming needles II.

[0045] The defoaming mechanism 3 also includes a bracket 35 arranged around the inner wall of the barrel 1;

[0046] The bracket 35 is fixed to the defoaming plate 33 on the inner side, and the bracket 35 is provided with a scraper 36 on the outer side that is adapted to the inner wall of the barrel 1.

[0047] In practical applications, the collar 34 extends downward in a conical shape, which matches the vortex shape formed by the silver paste at the rotating shaft 42 when the stirring mechanism 4 is working, making it easy to perform defoaming treatment; the scraper 36 is set downward from the inside to the outside, which makes it easy to scrape the silver paste off the inner wall of the barrel 1 and expand the effective material hanging area.

[0048] Working principle: The lifting mechanism 31 drives the defoaming mechanism 3 to move up and down, while also moving the collar 34 and scraper 36 to scrape down the silver paste adhering to the inner wall of the rotating shaft 42 and the barrel 1, helping more silver paste to be discharged through the outlet 11; the collar 34 is set with a cone shape to match the vortex formed by the silver paste at the rotating shaft 42, and together with the defoaming needle set on it, it further performs defoaming treatment to improve defoaming efficiency.

[0049] Example 4

[0050] This embodiment 4 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 2-3 As shown, based on embodiment 1, the following improvement is disclosed: the defoaming plate 33 is configured to be inclined downward from the side wall of the barrel 1 to the center.

[0051] In practical applications, the tilt angle of the defoaming plate 33 is adapted to the shape of the liquid surface of the silver paste driven by the stirring mechanism 4.

[0052] Working principle: An inclined defoaming plate 33 is set to ensure that the silver paste surface is adapted to the defoaming plate 33, especially in the center to avoid the formation of new bubbles due to the silver paste surface entrapment, thereby improving the quality of bubble dissolution and ensuring the defoaming effect.

[0053] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0054] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0055] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A silver paste defoaming device, comprising: A barrel body, a vacuum pump, a barrel cover located on the top of the barrel body, and a defoaming mechanism located inside the barrel body, wherein the barrel cover is provided with a feed inlet and a suction port connected to the vacuum pump, and the bottom of the barrel body is provided with a discharge outlet, characterized in that it further includes: a stirring mechanism located inside the barrel body. The defoaming mechanism includes: a lifting mechanism fixed to the bucket lid; The connecting rod that is transmitted to the power output end of the lifting mechanism; A collar is provided on one side of the connecting rod and is sleeved on the rotating shaft of the stirring mechanism and rotatably connected to the rotating shaft; Multiple defoaming plates fixed to the collar and arranged vertically in a radial pattern; The defoaming plate is provided with filter holes, and the surface of the defoaming plate facing the silver paste is provided with defoaming needles I.

2. The silver paste defoaming device as described in claim 1, characterized in that, The agitation mechanism includes: a motor fixed to the bucket lid; A rotating shaft located at the motor's power output end and extending into the barrel body; Agitator blades located at the end of the rotating shaft.

3. The silver paste defoaming device as described in claim 1, characterized in that, The collar is configured as a cone shape with a larger upper part and a smaller lower part, and its surface is provided with defoaming needles II.

4. The silver paste defoaming device as described in claim 1, characterized in that, The defoaming mechanism also includes: a support frame arranged around the inner wall of the barrel; The bracket is fixed to the defoaming board on the inside, and the bracket is provided with a scraper on the outside that is adapted to the inner wall of the barrel.

5. The silver paste defoaming device as described in claim 1, characterized in that, The defoaming board is configured to slope downwards from the side wall of the barrel to the center.

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