Vacuum defoaming machine

Abstract

The utility model relates to the technical field of defoaming machines, in particular to a vacuum defoaming machine which comprises a bearing plate, the bearing plate is provided with a defoaming machine body, the defoaming machine body comprises a shell, a vacuum device is fixedly arranged on one side of the shell, a heating cavity is formed in the bottom of the shell, a heat preservation cavity is formed in the shell, and the heating cavity is communicated with the heat preservation cavity. A stirring part is rotatably arranged above the shell, the stirring part comprises a plurality of stirring rods, and a conical block is installed at one end of each stirring rod in a threaded mode, in the vacuum defoaming machine, the stirring rods are arranged, the conical blocks are arranged at the bottoms of the stirring rods in a threaded mode, the bottom contact area is large, solder paste can be better pushed to flow at the bottom, and the stirring effect is better. The solder paste stirring device is provided with the stirring cavity, bubbles can be broken and promoted to move upwards, the heating cavity is further arranged, the heated solder paste can flow more in the stirring process, resistance is reduced, bubble discharging is further promoted, the heat preservation cavity is arranged to prevent heat loss, and the solder paste can be evenly heated in the stirring process.

Description

Technical Field

[0001] This utility model relates to the field of degassing machine technology, and in particular to a vacuum degassing machine. Background Technology

[0002] During the preparation of solder paste, air bubbles are often introduced due to material mixing and stirring processes. The presence of these air bubbles can seriously affect the performance of the solder paste, such as conductivity and mechanical strength, and consequently affect the quality of electronic products.

[0003] To address the issue of air bubbles in solder paste, vacuum degassing machines were developed. A vacuum degassing machine is a device that utilizes the low pressure of a vacuum environment to cause air bubbles to expand rapidly and burst, thereby eliminating them. Its working principle involves using a vacuum pump to extract air from inside a container, reducing the pressure and creating a vacuum environment. In this vacuum, the gas inside the bubbles expands rapidly due to the pressure difference and eventually bursts, achieving the purpose of removing the air bubbles.

[0004] When solder paste is not completely degassed and a small amount of residue remains, air bubbles may flow back, affecting the soldering strength. In view of this, a vacuum degaussing machine is provided. Utility Model Content

[0005] The main purpose of this invention is to provide a vacuum degassing machine to solve the problem mentioned in related technologies where incomplete degassing of solder paste with a small amount of residue leads to air bubble backflow affecting soldering strength.

[0006] To achieve the above objectives, according to one aspect of the present invention, a vacuum degassing machine is provided, including a support plate on which a degassing machine is mounted. The degassing machine includes a housing, a vacuum device fixedly mounted on one side of the housing, a heating chamber at the bottom of the housing, a heat preservation chamber inside the housing, and a stirring part rotatably mounted above the housing. The stirring part includes a plurality of stirring rods, and a conical block is threaded onto one end of each stirring rod.

[0007] As a preferred embodiment of this utility model, the housing has a stirring chamber for placing solder paste, the top of the stirring chamber has a feed inlet, and the heating chamber is square and located at the bottom of the stirring chamber.

[0008] As a preferred embodiment of this utility model, the heat preservation cavity is annular and located near the periphery of the stirring cavity.

[0009] As a preferred technical solution of this utility model, the vacuum device includes a vacuum pump mounted on a support plate, one end of which is fixedly connected to a vacuum tube, and the other end of which penetrates the side wall of the housing and extends into the stirring chamber.

[0010] As a preferred embodiment of the present invention, the stirring part further includes a plug-in plate, which is cylindrical and has the same bottom hole diameter as the feed inlet hole diameter. The plug-in plate is plugged into the feed inlet.

[0011] As a preferred embodiment of this utility model, a through hole is provided at the center of the side wall of the plug plate, and a number of symmetrical protrusions are fixedly provided on the side wall of the plug plate, with screws threaded on the protrusions.

[0012] As a preferred technical solution of this utility model, two symmetrical column holes are opened on the upper part of the housing, one end of the screw is threadedly connected to the column hole, and the screw fixes the protrusion on the upper part of the column hole.

[0013] As a preferred embodiment of this utility model, a connecting column is rotatably installed inside the through hole, a fixing plate is fixedly connected to one end of the connecting column, and one end of the fixing plate is fixedly connected to the stirring rod.

[0014] As a preferred technical solution of this utility model, the outer diameter of the conical block gradually decreases from bottom to top, and a screw hole is provided on the conical block, with one end of the stirring rod threaded into the screw hole.

[0015] As a preferred embodiment of this utility model, the insulation cavity is filled with an insulation medium, and the insulation medium is glass wool.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This vacuum degassing machine is equipped with a stirring rod, and a conical block is threaded at the bottom of the stirring rod. The bottom contact area is large, which can better promote the flow of solder paste at the bottom, help break bubbles and promote the upward movement of bubbles. It is also equipped with a heating chamber. The heated solder paste becomes more fluid during the stirring process, reduces resistance, and further promotes the expulsion of bubbles. A heat preservation chamber is set to prevent heat loss, so that the solder paste can be heated evenly during the stirring process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall vacuum degassing machine in a preferred embodiment of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the vacuum degassing machine in a preferred embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the stirring section in a preferred embodiment of the present invention;

[0021] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Illustration:

[0023] 1. Support plate; 2. Shell; 21. Heating cavity; 22. Insulation cavity;

[0024] 3. Stirring section; 31. Connecting plate; 311. Through hole;

[0025] 32. Fixing plate; 33. Screw; 34. Protrusion; 35. Connecting column; 36. Stirring rod;

[0026] 37. Conical block; 371. Screw hole;

[0027] 4. Vacuum tube; 5. Vacuum pump; 6. Stirring chamber. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] Please see Figures 1-4 As shown, the purpose of this embodiment is to provide a vacuum degassing machine, including a support plate 1, on which a degassing machine is mounted. The degassing machine includes a housing 2, on one side of which a vacuum device is fixedly mounted. A heating chamber 21 is opened at the bottom of the housing 2, and a heat preservation chamber 22 is opened inside the housing 2. A stirring part 3 is rotatably mounted above the housing 2. The stirring part 3 includes a plurality of stirring rods 36, and a conical block 37 is threadedly mounted on one end of each stirring rod 36.

[0030] The housing 2 has a stirring chamber 6 for placing solder paste. The stirring chamber 6 has a feed port at the top. The heating chamber 21 is square and located at the bottom of the stirring chamber 6. The heated solder paste becomes more fluid during the stirring process, which helps to remove air bubbles in the solder paste. The square design of the heating chamber 21 helps to ensure that the solder paste is heated evenly during the stirring process.

[0031] The insulation cavity 22 is annular and located near the periphery of the stirring cavity 6. The insulation cavity 22 provides the necessary insulation for stirring in the stirring cavity 6.

[0032] The vacuum device includes a vacuum pump 5 mounted on a support plate 1. One end of the vacuum pump 5 is fixedly connected to a vacuum tube 4, and the other end of the vacuum tube 4 passes through the side wall of the housing 2 and extends into the stirring chamber 6. The vacuum pump 5 evacuates the stirring chamber 6.

[0033] The stirring unit 3 also includes a plug plate 31, which is cylindrical and has the same bottom hole diameter as the feed inlet diameter. The plug plate 31 is plugged into the feed inlet, and the connection between the plug plate 31 and the feed inlet is sealed. Preferably, a rubber sealing ring can be used to seal the plug plate 31 and the feed inlet.

[0034] A through hole 311 is provided at the center of the side wall of the plug plate 31. Several symmetrical protrusions 34 are fixedly provided on the side wall of the plug plate 31, and screws 33 are threaded on the protrusions 34.

[0035] Two symmetrical column holes are provided on the upper part of the housing 2. One end of the screw 33 is threaded to the column hole, and the screw 33 fixes the protrusion 34 on the upper part of the column hole.

[0036] A connecting post 35 is rotatably installed inside the through hole 311. One end of the connecting post 35 is fixedly connected to a fixing plate 32. One end of the fixing plate 32 is fixedly connected to a stirring rod 36. The stirring rod 36 is thin and has a smooth surface, which can reduce the shearing force on the solder paste and avoid the re-formation of bubbles after the bubbles are broken due to strong shearing, thereby improving the degassing efficiency.

[0037] A power source is fixedly connected to the top of the connecting post 35. The power source is preferably a micro motor. When the plug plate 31 is fixedly installed on the feed port, the connecting post 35 is rotated and installed in the through hole 311. At this time, the power source drives the connecting post 35 to rotate, thereby driving the fixed plate 32 to rotate, and further driving the stirring rod 36 to rotate to stir the solder paste.

[0038] The outer diameter of the conical block 37 gradually decreases from bottom to top, and a screw hole 371 is provided on the conical block 37. One end of the stirring rod 36 is threaded into the screw hole 371. The threaded installation structure is simple and easy to operate. Preferably, the conical block 37 has a frustum structure, and the bottom contact area of ​​the conical block 37 is large, which can better promote the flow of solder paste at the bottom and form a bottom-up bubble channel. This helps to squeeze and break the bubbles at the bottom and promote the upward movement of the bubbles. As the stirring rod 36 gradually tapers upward, and is used in conjunction with the vacuum pump 5, it helps the bubbles escape more quickly. At the same time, the inclined outer wall of the conical block 37 is designed to be smooth by plating. The surface of the conical block 37 is coated with a smooth metal or non-metal coating. The smooth surface can reduce the possibility of bubble adhesion. A rough surface may become a place where bubbles accumulate, making it difficult for bubbles to be released. A smooth surface can reduce the occurrence of this phenomenon, allowing bubbles to more easily detach from the solder paste surface and be extracted by the vacuum.

[0039] The insulation cavity 22 is filled with insulation medium, which is glass wool. Glass wool has a light density, low thermal conductivity, and high safety. The side wall of the shell 2 is provided with a filling port, through which the insulation medium is injected into the insulation cavity 22, and a sealing plug is provided.

[0040] In practical use, the present invention fills the insulation chamber 22 with insulation medium, and then injects solder paste into the stirring chamber 6 through the feed port. The conical block 37 is threadedly fixed to the bottom of the stirring rod 36, and the protrusion 34 is fixedly installed above the column hole by the screw 33, thereby inserting and fixing the plug plate 31 to the feed port. Then, the connecting column 35 is driven to rotate by the power source to drive the fixing plate 32 to rotate. Since the stirring rod 36 is fixedly installed at the bottom of the fixing plate 32, the stirring rod 36 rotates accordingly. Then, the vacuum pump 5 extracts the gas in the stirring chamber 6 through the vacuum tube 4 to form a pressure difference to break the bubbles. During this process, the heating chamber 21 heats the solder paste evenly, promoting the expulsion of bubbles during the stirring process.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A vacuum degassing machine, comprising a support plate (1), wherein a degassing machine is disposed on the support plate (1), the degassing machine comprising a housing (2), wherein a vacuum device is fixedly disposed on one side of the housing (2), characterized in that, The bottom of the shell (2) is provided with a heating chamber (21) and the inside of the shell (2) is provided with a heat preservation chamber (22). A stirring part (3) is rotatably arranged above the shell (2). The stirring part (3) includes several stirring rods (36). A conical block (37) is threaded onto one end of the stirring rod (36).

2. The vacuum degassing machine according to claim 1, characterized in that, The housing (2) has a stirring chamber (6) for placing solder paste. The stirring chamber (6) has a feed port at the top. The heating chamber (21) is square and located at the bottom of the stirring chamber (6).

3. The vacuum degassing machine according to claim 1, characterized in that, The heat preservation cavity (22) is annular and located near the periphery of the stirring cavity (6).

4. A vacuum degassing machine according to claim 1, characterized in that, The vacuum device includes a vacuum pump (5) mounted on a support plate (1). One end of the vacuum pump (5) is fixedly connected to a vacuum tube (4), and the other end of the vacuum tube (4) passes through the side wall of the housing (2) and extends into the stirring chamber (6).

5. A vacuum degassing machine according to claim 1, characterized in that, The stirring part (3) also includes a plug plate (31), which is cylindrical and has the same bottom hole diameter as the feed inlet hole diameter. The plug plate (31) is plugged into the feed inlet.

6. A vacuum degassing machine according to claim 5, characterized in that, The plug plate (31) has a through hole (311) at the center of its side wall, and a number of symmetrical protrusions (34) are fixedly provided on the side wall of the plug plate (31), and screws (33) are threaded on the protrusions (34).

7. A vacuum degassing machine according to claim 6, characterized in that, The housing (2) has two symmetrical column holes on its upper part. One end of the screw (33) is threaded into the column hole, and the screw (33) fixes the protrusion (34) on the upper part of the column hole.

8. A vacuum degassing machine according to claim 6, characterized in that, A connecting column (35) is rotatably installed inside the through hole (311). A fixing plate (32) is fixedly connected to one end of the connecting column (35). One end of the fixing plate (32) is fixedly connected to the stirring rod (36).

9. A vacuum degassing machine according to claim 1, characterized in that, The outer diameter of the conical block (37) gradually decreases from bottom to top, and a screw hole (371) is provided on the conical block (37), and one end of the stirring rod (36) is threaded into the screw hole (371).

10. A vacuum degassing machine according to claim 1, characterized in that, The insulation cavity (22) is filled with an insulation medium, which is glass wool.

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