Self-defoaming solder paste stirrer

Abstract

The utility model discloses a self-defoaming solder paste stirrer, and particularly relates to the technical field of solder paste stirring, the self-defoaming solder paste stirrer comprises a workbench, a stirring barrel, a water storage tank and a supporting stand column are sequentially installed on the surface of the workbench, a cooling piece is sleeved outside the stirring barrel and communicated with the water storage tank, a stirring piece is installed inside the stirring barrel, and the supporting stand column is communicated with the cooling piece. The top of the stirring barrel is provided with a separated barrel cover, the top of the barrel cover is provided with a driving piece, a stirring piece is hung below the barrel cover, the driving piece and the stirring piece are in transmission through a magnetic coupler, the top end of the supporting stand column is provided with a top plate, and the top plate is provided with a lifting mechanism for driving the driving piece and the barrel cover to lift. The temperature inside the stirring barrel is kept in a low environment, the phenomenon that bubbles are increased due to stirring temperature rise in the stirring process of solder paste is avoided, the sealing performance of the stirring barrel part in the stirring process is improved, air entering is reduced, the content of air in the solder paste is reduced, and the forming opportunity of the bubbles is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tin paste stirring, more specifically, the utility model relates to a self defoaming type tin paste stirring machine. BACKGROUND

[0002] Tin paste is mainly composed of the following components: metal powder: usually alloy powder of tin, silver, copper and other metals; soldering flux: including resin, active agent, solvent and the like, used for removing oxide layer and improving welding performance; adhesive: used for maintaining the viscosity and shape of tin paste; additive: used for improving specific performance of tin paste, such as fluidity, thixotropy and the like.

[0003] During the stirring process of tin paste, bubbles may be generated due to the following reasons:

[0004] During the stirring process, mechanical energy and friction will generate heat, causing the temperature of tin paste to rise, and the rise in temperature will reduce the viscosity of tin paste, accelerate solvent evaporation and promote the formation of bubbles.

[0005] Excessive stirring speed will cause a large amount of air to be entrained in the tin paste, leading to the formation of bubbles.

[0006] Foaming will cause bubbles to appear in the tin paste, affecting the fluidity and printing accuracy of the tin paste, leading to poor printing, and the air in the bubbles will expand during reflow soldering, causing cavities to appear in the solder joints and affecting the soldering strength and reliability. SUMMARY

[0007] To solve the above technical problems, the utility model provides a self defoaming type tin paste stirring machine, which comprises a workbench, a stirring barrel, a water storage tank and a supporting column are sequentially installed on the surface of the workbench, a cooling member is sleeved outside the stirring barrel, the cooling member is communicated with the water storage tank, a stirring member is installed inside the stirring barrel, a detachable barrel cover is installed on the top of the stirring barrel, a driving member is installed on the top of the barrel cover, the stirring member is suspended below the barrel cover, the driving member and the stirring member are driven through a magnetic coupler, a top plate is installed at the top end of the supporting column, and a lifting mechanism for lifting the driving member and the barrel cover is installed on the top plate.

[0008] In a preferred embodiment, the cooling member comprises two annular pipes arranged one above the other, the two annular pipes are sleeved and attached to the outer wall of the stirring barrel, a plurality of cooling pipes are communicated between the two annular pipes, and a water channel pipe is communicated outside each of the two annular pipes.

[0009] An outer cover is sleeved outside the annular pipe and the cooling pipe, the outer cover is fixedly sleeved on the outer wall of the stirring barrel, and the water channel pipe penetrates through the outer cover and is connected with the water storage tank.

[0010] In a preferred embodiment, the stirring piece comprises a stirring shaft inside the stirring barrel and stirring blades mounted on the outer wall of the stirring shaft, a shaft sleeve pipe is sleeved on the top end of the stirring shaft, and a bent connecting rod is mounted on the outer wall of the shaft sleeve pipe, with the other end of the connecting rod fixed on the bottom of the barrel cover.

[0011] In a preferred embodiment, the driving piece comprises a driving box mounted on the top of the barrel cover, and a servo motor fixedly mounted inside the driving box.

[0012] In a preferred embodiment, the magnetic coupling comprises a permanent magnet rotor fixed on the output shaft end of the servo motor and a conductor rotor fixed on the top end of the stirring shaft, and the permanent magnet rotor and the conductor rotor are separated by the barrel cover.

[0013] A recessed connecting groove is formed in the middle of the bottom end of the barrel cover, and the conductor rotor is located inside the connecting groove.

[0014] In a preferred embodiment, the lifting mechanism comprises a servo push rod fixed on the top plate, and the output shaft of the servo push rod extends downward and is connected to the top of the driving box.

[0015] Technical effects and advantages of the present application:

[0016] 1. The present application keeps the temperature inside the stirring barrel at a low environment, avoiding the increase of air bubbles caused by the temperature rise during the stirring process of the solder paste.

[0017] 2. The present application improves the sealing performance of the stirring barrel during stirring, reduces the entry of air, reduces the content of air in the solder paste, and reduces the opportunity of air bubble formation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the internal structure of the cover and the stirring barrel of the present application.

[0020] Figure 3 It is a schematic diagram of the Figure 2 detail of A in the present application.

[0021] BRIEF DESCRIPTION OF DRAWINGS 1 workbench, 2 stirring barrel, 3 water storage tank, 4 supporting column, 5 top plate, 6 annular pipe, 7 cooling pipe, 8 water pipe, 9 stirring shaft, 10 stirring blade, 11 shaft sleeve pipe, 12 connecting rod, 13 driving box, 14 servo motor, 15 permanent magnet rotor, 16 conductor rotor, 17 connecting groove, 18 servo push rod, 19 cover, 20 barrel cover. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0023] like Figures 1-3 The self-defoaming solder paste mixer shown includes a workbench 1. A mixing tank 2, a water tank 3, and a support column 4 are sequentially installed on the surface of the workbench 1. A cooling component is fitted outside the mixing tank 2 and is connected to the water tank 3. A mixing component is installed inside the mixing tank 2. A detachable cylinder cover 20 is installed on the top of the mixing tank 2. A driving component is installed on the top of the cylinder cover 20. The mixing component is suspended below the cylinder cover 20. The driving component and the mixing component are driven by a magnetic coupler. A top plate 5 is installed at the top of the support column 4. A lifting mechanism that drives the driving component and the cylinder cover 20 to move up and down is installed on the top plate 5.

[0024] Based on the above, during use, the lifting mechanism raises the cylinder cover 20 from the top of the mixing tank 2, pours the solder paste to be mixed into the mixing tank 2, then resets the cylinder cover 20, starts the drive unit, and drives the mixing component to rotate inside the mixing tank 2 to mix the solder paste. During the mixing process, the cooling component and the water tank 3 circulate cooling water to cool the mixing tank 2, avoid the temperature from getting too high during the mixing process, reduce the evaporation of solvent in the solder paste, and reduce the generation of solder paste bubbles.

[0025] The cooling component includes two annular tubes 6, which are sleeved and attached to the outer wall of the mixing tank 2. Several cooling tubes 7 are connected between the two annular tubes 6, and water pipes 8 are connected to the outside of both annular tubes 6.

[0026] The annular pipe 6 and the cooling pipe 7 are covered with an outer cover 19, which is fixedly fitted on the outer wall of the mixing tank 2. The water pipe 8 passes through the outer cover 19 and is connected to the water storage tank 3.

[0027] Based on the above, the water storage tank 3 is used to hold cooling water. There are also two water inlets on the outer wall of the water storage tank 3 that are connected to the external water supply pipeline for replacing the cooling water inside the water storage tank 3. A water pump is installed inside the water storage tank 3 to circulate the cooling water inside the water storage tank 3 between the annular pipe 6 and the cooling pipe 7 through the water pipe 8 to achieve the effect of cooling the mixing tank 2.

[0028] Further, when the tin paste in the stirring barrel 2 is stirred, the water pump in the water storage tank 3 sends the cooling water through one of the water pipes 8 to one of the annular pipes 6 outside the stirring barrel 2, and then through the annular pipe 6 to the cooling pipes 7, which are attached to the outer wall of the stirring barrel 2, to cool the stirring barrel 2, and then the cooling water is circulated to the other annular pipe 6, from the water pipe 8 connected to the other annular pipe 6 to the inside of the water storage tank 3, completing the circulation of the cooling water, so that the temperature inside the stirring barrel 2 is kept at a lower environment, avoiding the increase of air bubbles in the tin paste due to the temperature rise during stirring.

[0029] The stirring part includes a stirring shaft 9 inside the stirring barrel 2 and a stirring blade 10 mounted on the outer wall of the stirring shaft 9. An axle sleeve 11 is provided on the top end of the stirring shaft 9. A bent connecting rod 12 is mounted on the outer wall of the axle sleeve 11, and the other end of the connecting rod 12 is fixed to the bottom of the cylinder cover 20.

[0030] Based on the above, the stirring shaft 9 is not directly connected to the cylinder cover 20, but is inserted into the axle sleeve 11, and the axle sleeve 11 is suspended below the cylinder cover 20 through the connecting rods 12 on both sides, so that the stirring shaft 9 does not contact the cylinder cover 20 and does not penetrate the cylinder cover 20, ensuring the integrity of the cylinder cover 20.

[0031] The driving part includes a driving box 13 mounted on the top of the cylinder cover 20. A servo motor 14 is fixedly installed inside the driving box 13. The magnetic coupling includes a permanent magnet rotor 15 fixed to the output shaft end of the servo motor 14 and a conductor rotor 16 fixed to the top end of the stirring shaft 9. The permanent magnet rotor 15 and the conductor rotor 16 are separated by the cylinder cover 20.

[0032] Based on the above, the stirring shaft 9 is not directly connected to the cylinder cover 20, and the conductor rotor 16 is mounted on the top end of the stirring shaft 9, cooperating with the permanent magnet rotor 15 of the output shaft of the servo motor 14 above the cylinder cover 20 to form a magnetic coupling for magnetic connection, without mechanical connection for torque transmission between the two, so that the cylinder cover 20 can remain intact.

[0033] Further, when the servo motor 14 works and drives the permanent magnet rotor 15 to rotate, the permanent magnet rotor 15 drives the conductor rotor 16 at the top end of the stirring shaft 9 to rotate through magnetic connection, and then the stirring shaft 9 rotates in the axle sleeve 11 in the stirring barrel 2, so that the stirring blade 10 stirs the tin paste in the stirring barrel 2.

[0034] Since the stirring shaft 9 and the servo motor 14 for driving are magnetically connected by the magnetic coupling for transmission, the integrity of the cylinder cover 20 part can be ensured, and the sealing performance of the stirring barrel 2 part during stirring is improved, the air entering is reduced, the content of air in the tin paste is reduced, and the opportunity of air bubble formation is reduced.

[0035] The coupling groove 17 is concave in the middle of the bottom end of the barrel cover 20, and the conductor rotor 16 is located inside the coupling groove 17.

[0036] Based on the above, by opening the coupling groove 17 at the bottom of the barrel cover 20, the height of the conductor rotor 16 in the stirring barrel 2 can be improved, that is, the distance between the conductor rotor 16 and the permanent magnet rotor 15 is reduced, and the magnetic connection between the two is more stable.

[0037] Further, during the tin paste stirring process, the servo motor 14 is driven to control the rotating speed, so that it remains in a low-speed state during stirring, avoiding too fast stirring speed, that is, the tin paste heating rate can be reduced, and air entrainment can be reduced, effectively reducing bubble formation.

[0038] The lifting mechanism includes a servo push rod 18 fixed on the top plate 5, and the output shaft of the servo push rod 18 extends downward and is connected to the top of the drive box 13.

[0039] Based on the above, the servo push rod 18 drives the drive box 13 and the barrel cover 20 to lift during work, realizing the opening and sealing of the stirring barrel 2, and facilitating the tin paste stirring operation.

[0040] Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially stated and limited, are implemented according to the conventional means in the art.

Claims

1. A self-antifoaming type solder paste mixer characterized by comprising: The workbench is provided with a stirring barrel, a water storage tank and a supporting column in sequence on the surface of the workbench, the stirring barrel is externally sleeved with a cooling member, the cooling member is communicated with the water storage tank, the stirring barrel is internally provided with a stirring member, a detachable barrel cover is installed on the top of the stirring barrel, a driving member is installed on the top of the barrel cover, the stirring member is suspended below the barrel cover, the driving member and the stirring member are driven by a magnetic coupler, a top plate is installed on the top end of the supporting column, and a lifting mechanism for driving the lifting of the driving member and the barrel cover is installed on the top plate.

2. The self-defoaming solder paste mixer according to claim 1, characterized in that: The cooling member comprises two annular pipes arranged in sequence, the two annular pipes are sleeved and attached to the outer wall of the stirring barrel, a plurality of cooling pipes are communicated between the two annular pipes, and waterway pipes are communicated outside the two annular pipes. The annular pipes and the cooling pipes are externally sleeved with an outer cover, the outer cover is fixedly sleeved on the outer wall of the stirring barrel, and the waterway pipes are connected with the water storage tank through the outer cover.

3. The self-defoaming tin cream stirrer according to claim 1, characterized in that: The stirring member comprises a stirring shaft arranged in the stirring barrel and stirring blades arranged on the outer wall of the stirring shaft, a shaft sleeve pipe is externally sleeved on the top end of the stirring shaft, and a bent connecting rod is arranged on the outer wall of the shaft sleeve pipe and fixed to the bottom of the barrel cover.

4. The self-defoaming solder paste mixer according to claim 3, characterized in that: The driving member comprises a driving box installed on the top of the barrel cover, and a servo motor is fixedly installed in the driving box.

5. The self-defoaming solder paste mixer according to claim 4, characterized in that: The magnetic coupler comprises a permanent magnet rotor fixed to the output shaft end of the servo motor and a conductor rotor fixed to the top end of the stirring shaft, and the permanent magnet rotor and the conductor rotor are separated by the barrel cover. A recessed connecting groove is arranged in the middle of the bottom end of the barrel cover, and the conductor rotor is arranged in the connecting groove.

6. The self-defoaming solder paste mixer according to claim 3, characterized in that: The lifting mechanism comprises a servo push rod fixed to the top plate, and the output shaft of the servo push rod extends downward and is connected with the top of the driving box.

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