Ultrasonic vacuum filling and sealing machine and filling and sealing process thereof

Abstract

The ultrasonic vacuum filling and sealing machine comprises a machine body, a filling and sealing box is arranged on one side of the upper surface of the machine body, a guide seat is arranged on the other side of the upper surface of the machine body, and a box opening for a power container to pass through is formed in the side, close to the guide seat, of the filling and sealing box. A filling and sealing gun vertically extending downwards is arranged in the center of the inner top wall of the filling and sealing box, and an ultrasonic generator and an electric heater are installed at the positions, located on the periphery of the filling and sealing gun, of the inner top wall of the filling and sealing box. Ultrasonic energy generated by working of the ultrasonic generator can change the fluidity and viscosity of a pouring material, promote permeation and filling of the pouring material, reduce bubbles and improve the uniformity of the pouring material, heat is generated by electrifying the electric heater, the pouring material is heated and subjected to heat preservation, premature cooling of the pouring material is avoided, pouring material forming is facilitated, and the production efficiency is improved. The automatic feeding and discharging device can replace traditional manpower for automatic feeding and discharging of capacitors, time and labor are saved, the feeding and discharging speed is high, and the capacitor pouring machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor potting, in particular to an ultrasonic vacuum potting machine and a potting process thereof. Background Art

[0002] Capacitor potting is a processing method used to protect the electronic components inside the capacitor and improve the reliability of its working environment. It is a process that isolates the electronic components inside the capacitor from the external environment and fills the inside of the capacitor with sealing materials to achieve the purpose of protection, insulation, moisture resistance, and corrosion resistance. It is widely used in electronic device manufacturing, power equipment, communication equipment, automotive electronics and other fields.

[0003] The materials used for capacitor potting are often epoxy resin, silicone rubber, polyurethane, etc. The potting machine in the prior art pours the potting material into the capacitor housing by injection, coating or infusion. During the potting process, it is necessary to ensure that the potting material can fully fill the cavity in the capacitor and exclude bubbles to ensure the potting quality.

[0004] In the existing potting process, after potting, the potting material in the capacitor housing needs to be manually leveled. After manual leveling, the top surface of the potting material needs to be blown flat with a hot air gun. The leveling and blowing processes are time-consuming and labor-intensive, increasing the labor intensity of workers. At the same time, due to the use of a hot air gun, there is a lot of fine dust on the surface of the potting material, which affects the potting quality of the capacitor.

[0005] Secondly, when the existing potting machine is in use, the loading and unloading of capacitors is mainly completed by manpower, which is not only time-consuming and labor-intensive, but also slow, reducing the efficiency of the capacitor potting process. Summary of the invention

[0006] The object of the present invention is to provide an ultrasonic vacuum sealing machine and a sealing process thereof with good sealing quality and high efficiency, so as to effectively solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions.

[0008] An ultrasonic vacuum filling machine comprises a machine body, a filling box is provided on one side of the upper surface of the machine body, a guide seat is provided on the other side of the upper surface of the machine body, a box opening for a capacitor to pass through is provided on the side of the filling box close to the guide seat, a filling gun extending vertically downward is provided at the center of the inner top wall of the filling box, an ultrasonic generator and an electric heater are respectively installed on the inner top wall of the filling box at the periphery of the filling gun, and a vacuum suction pipe communicating with the inside of the filling box is installed on the top of the filling box; a double-axis moving group is provided on the inner bottom wall of the filling box, a placing seat is provided inside the filling box through the double-axis moving group, a fixture seat for placing a capacitor shell is provided above the placing seat, and a connecting seat is provided on the side of the fixture seat; the double-axis moving group is used to drive the placing seat to move along the length direction of the machine body or the width direction of the machine body; a rotating clamping mechanism is installed on the guide seat through a driving mechanism, the driving mechanism is used to drive the rotating clamping mechanism to translate along the length direction of the guide seat, and the rotating clamping mechanism is used to be clamped and connected with the connecting seat; an opening and closing mechanism for blocking the box opening is provided on the side of the filling box close to the guide seat.

[0009] It can be seen that the potting material is poured into the shell of the capacitor through the potting gun, and the potting box is pre-evacuated through the vacuum tube. The reduction of gas in the vacuum state can better eliminate bubbles and maintain the purity of the potting material. At the same time, the potting material can better penetrate into the complex structure and narrow space inside the capacitor. Secondly, after the potting is completed, the vacuum environment is maintained for a period of time, which can better eliminate the residual gas in the capacitor, which helps to reduce the formation of bubbles and improve the insulation performance. At the same time, the ultrasonic generator starts to work, converts high-frequency electrical energy into vibration energy, and converts vibration energy into ultrasonic energy through the transducer. The ultrasonic energy changes the fluidity and viscosity of the potting material, promotes the penetration and filling of the potting material, reduces bubbles, and improves the uniformity of the potting material. At the same time, the electric heater is powered on to heat and heat the potting material to prevent the potting material from cooling prematurely, which is conducive to the molding of the potting material. The driving mechanism works to push the jig seat to continue to move toward one side of the potting box until the jig seat enters above the placement seat in the potting box, thus completing the automatic loading of the capacitor. The driving mechanism works to drive the rotating clamping mechanism to approach the connecting seat, and the rotating clamping mechanism works to clamp and fix the connecting seat. Then, the driving mechanism works to drive the rotating clamping mechanism and the connecting seat to move away from the potting box, thereby transferring the jig seat from the placement seat to the guide seat. After the potting material cools, the capacitor is transferred from the jig seat by the robotic arm, thus realizing the unloading of the capacitor. The driving mechanism drives the rotating clamping mechanism to move on the guide seat, and the clamping cooperation between the rotating clamping mechanism and the connecting seat facilitates the transfer of the jig seat, and cooperates with the robotic arm to take and place the capacitor, thereby realizing the automatic loading and unloading of the capacitor, replacing the traditional manual operation, saving time and effort, and increasing the loading and unloading speed, thus improving the efficiency of the capacitor potting process.

[0010] Preferably, a movable groove is provided on the upper surface of the guide seat, and the driving mechanism includes a threaded rod, a nut seat and a first driving motor; the threaded rod is rotatably installed in the movable groove, the first driving motor is fixed to a side of the driving mechanism, and the output shaft of the first driving motor is fixedly connected to one end of the threaded rod; the nut seat is limitedly slidably installed in the movable groove and is sleeved on the outside of the threaded rod, and the rotating clamping mechanism is arranged on the top of the nut seat.

[0011] The first driving motor drives the threaded rod to rotate forward and reversely. The rotating threaded rod drives the nut seat to move back and forth in the moving groove, and drives the rotating clamping mechanism to move synchronously, providing stable drive for the transfer of the fixture seat.

[0012] Preferably, the rotating clamping mechanism includes a shaft, a second drive motor, an insertion rod and a clamping block, and a bracket is fixed to the upper surface of the nut seat; the shaft extending along the length direction of the guide seat is rotatably installed on the side of the bracket close to the filling box, the second drive motor is fixed on the other side of the bracket, and the output shaft of the second drive motor is fixedly connected to one end of the shaft; the insertion rod is fixed on the end of the shaft away from the second drive motor; the two clamping blocks are symmetrically fixed on the outer peripheral surface of the insertion rod; a socket matching the insertion rod is provided on the side of the connecting seat away from the jig seat, and a clearance hole coaxially penetrating with the socket is provided in the connecting seat; guide grooves matching the clamping blocks are symmetrically provided on both sides of the inner wall of the socket, the guide grooves are all penetrated by the clearance holes, and the inner diameter of the clearance hole is larger than the distance between the inner walls of the two guide grooves away from each other.

[0013] The driving mechanism drives the rotating clamping mechanism to move toward one side of the connecting seat until the insertion rod passes through the insertion hole and is inserted into the makeshift hole. During this process, the clamping block matches and passes through the guide groove. Subsequently, the shaft rod is driven to rotate by the second driving motor, and the insertion rod and the clamping block are driven to rotate. The rotating clamping block is misaligned with the guide groove and can be clamped and connected with the connecting seat, so as to drive the fixture seat to move for transportation.

[0014] Preferably, the biaxial moving group includes a first power guide rail, a first moving seat, a second power guide rail and a second moving seat; the first power guide rail is fixed on the inner bottom wall of the filling box, and the first power guide rail is equipped with a first moving seat that can be translated along the width direction of the machine body; the second power guide rail is fixed on the top of the first moving seat, and the second power guide rail is equipped with a second moving seat that can be translated along the length direction of the machine body, and the placement seat is fixed on the upper end of the second moving seat.

[0015] The first power guide rail is used to drive the first movable seat to move along the width direction of the machine body, and the second power guide rail is used to drive the second movable seat to move along the length direction of the machine body, thereby driving the placement seat to perform bidirectional translation adjustment. On the one hand, it is convenient to move the jig seat and facilitate the potting gun to pot capacitors at different positions on the jig seat. On the other hand, the second power guide rail can transfer the placement seat and the jig seat from the box mouth to the outside of the potting box, so as to facilitate the clamping of the jig seat with the rotating clamping mechanism.

[0016] Preferably, a sliding groove extending vertically upward and penetrating the interior of the potting box is provided on one side of the upper surface of the potting box near the box opening, and the opening and closing mechanism includes a blocking door panel and an electric push cylinder; the blocking door panel is limitedly slidably installed in the sliding groove, the electric push cylinder is fixed to the side of the upper end of the potting box near the box opening, and the end of the telescopic rod of the electric push cylinder is fixed to the bottom of the blocking door panel through a connecting block.

[0017] By extending the telescopic rod of the electric push cylinder, under the connecting action of the connecting block, the blocking door plate can be driven to slide downward in the sliding groove, thereby achieving a blocking effect on the box opening, which is convenient for forming a vacuum environment in the potting box; by retracting the telescopic rod of the electric push cylinder, the blocking door plate can be driven to move up, so that the box opening is opened, which is convenient for the capacitor to enter and exit.

[0018] Preferably, the upper surface of the guide seat is symmetrically provided with mounting grooves extending along the length direction of the guide seat on both sides of the movable groove; guide rollers are rotatably installed in both mounting grooves, and the outer peripheral top of the guide roller is flush with the upper surface of the placement seat.

[0019] When the driving mechanism works to transfer the jig seat from the placement seat to the guide seat, since the top of the outer periphery of the guide roller is flush with the upper surface of the placement seat, the guide roller rubs against the bottom of the jig seat and rolls, providing a guide for the jig seat and helping the transfer of the jig seat to be smoother and more stable.

[0020] Preferably, an electromagnet is embedded and installed on the upper surface of the placement seat, and the upper surface of the electromagnet is flush with the upper surface of the placement seat; the bottom of the fixture seat is made of a magnetic metal material.

[0021] After the jig seat is completely transferred from the guide seat to the placement seat, the electromagnet is energized to generate magnetic force, which cooperates with the magnetic attraction at the bottom of the jig seat to fix the jig seat, prevent the jig seat from shifting during the pouring process, and improve the accuracy of the pouring position.

[0022] The present invention also provides a sealing process of an ultrasonic vacuum sealing machine, using any of the above ultrasonic vacuum sealing machines, and the specific process steps are as follows:

[0023] Step 1: Loading capacitors

[0024] The jig seat is placed on the guide seat, and the driving mechanism drives the rotating clamping mechanism to move to one side of the potting box until the rotating clamping mechanism is connected with the connecting seat. Then, the capacitor housing is placed on the jig seat correspondingly by the robotic arm, and then the driving mechanism works to push the jig seat to continue to move to one side of the potting box until the jig seat enters above the placement seat in the potting box, thus completing the automatic loading of the capacitor;

[0025] Step 2: Ultrasonic Vacuum Infusion

[0026] The box opening is sealed by the opening and closing mechanism, and the inside of the potting box is evacuated by the vacuum suction tube. Then, the potting material is poured into the shell of the capacitor through the potting gun. At the same time, the ultrasonic generator is started to convert high-frequency electrical energy into vibration energy, and the vibration energy is converted into ultrasonic energy through the transducer. The ultrasonic energy changes the fluidity and viscosity of the potting material, promotes the penetration and filling of the potting material, reduces bubbles, and improves the uniformity of the potting material. At the same time, the electric heater is powered on for heating at a temperature of 70-100°C to heat and keep the potting material warm, so as to avoid premature cooling of the potting material and facilitate the molding of the potting material.

[0027] Step 3: Discharging capacitors

[0028] The opening and closing mechanism works to open the box mouth, the placement seat and the fixture seat are translated and transferred to the guide seat side by the dual-axis moving group, the driving mechanism drives the rotating clamping mechanism to approach the connecting seat, the rotating clamping mechanism works to clamp and fix with the connecting seat, and then the driving mechanism drives the rotating clamping mechanism and the connecting seat to move away from the potting box, so that the fixture seat is transferred from the placement seat to the guide seat, and after the potting material is cooled, the capacitor is transferred from the fixture seat by the robotic arm, so that the capacitor is unloaded.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0030] 1. The present invention converts high-frequency electrical energy into vibration energy through the operation of an ultrasonic generator, and converts the vibration energy into ultrasonic energy through a transducer. The ultrasonic energy changes the fluidity and viscosity of the potting material, promotes the penetration and filling of the potting material, reduces bubbles, and improves the uniformity of the potting material. The electric heater is powered on to generate heat to heat and keep the potting material warm, thereby avoiding premature cooling of the potting material and facilitating the molding of the potting material.

[0031] 2. The present invention pre-evacuates the potting box by using a vacuum suction tube. The reduction of gas in the vacuum state can better remove bubbles and maintain the purity of the potting material. At the same time, the potting material can better penetrate into the complex structure and narrow space inside the capacitor. After the potting is completed, the vacuum environment is maintained for a period of time, which can better remove the residual gas in the capacitor, which helps to reduce the formation of bubbles and improve the insulation performance.

[0032] 3. The present invention drives the rotary clamping mechanism to move on the guide seat through a driving mechanism, and combines the clamping cooperation between the rotary clamping mechanism and the connecting seat to facilitate the transfer of the fixture seat, and cooperates with the robotic arm to take and place the capacitor, thereby realizing automatic loading and unloading of the capacitor, replacing traditional manual operation, saving time and labor, and increasing the loading and unloading speed, thereby improving the efficiency of capacitor filling processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the local structure of the outer surface of the potting box in the present invention;

[0035] Figure 3 It is a schematic diagram of the local structure of the top wall of the potting box in the present invention;

[0036] Figure 4 It is a detailed structural diagram of the dual-axis moving group in the present invention;

[0037] Figure 5 It is a schematic diagram of the coordination of the placement seat and the fixture structure in the present invention;

[0038] Figure 6 It is a schematic diagram of the local structure of the upper surface of the guide seat in the present invention;

[0039] Figure 7 It is a detailed structural diagram of the rotary clamping mechanism in the present invention;

[0040] Figure 8 It is a schematic diagram of the cooperation between the rotating clamping mechanism and the connecting seat structure in the present invention.

[0041] Explanation of the reference numerals in the figure: 1. Machine body; 2. Potting box; 201. Box opening; 21. Potting gun; 22. Ultrasonic generator; 23. Electric heater; 24. Vacuum extraction tube; 3. Double-axis moving group; 31. First power rail; 32. First moving seat; 33. Second power rail; 34. Second moving seat; 4. Placement seat; 41. Electromagnet; 5. Fixture seat; 51. Connecting seat; 511. Socket; 512. Clearance hole ; 513, guide groove; 6, opening and closing mechanism; 61, sliding groove; 62, blocking door panel; 63, electric push cylinder; 64, connecting block; 7, guide seat; 71, mounting groove; 72, guide roller; 8, driving mechanism; 81, moving groove; 82, threaded rod; 83, nut seat; 84, first driving motor; 9, rotating clamping mechanism; 91, bracket; 92, shaft rod; 93, second driving motor; 94, plug rod; 95, clamping block. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-8The present invention provides an ultrasonic vacuum potting machine, comprising a machine body 1, a potting box 2 is provided on one side of the upper surface of the machine body 1, a guide seat 7 is provided on the other side of the upper surface of the machine body 1, a box opening 201 for a capacitor to pass through is provided on the side of the potting box 2 close to the guide seat 7, a potting gun 21 extending vertically downward is provided at the center of the inner top wall of the potting box 2, the potting gun 21 is communicated with a storage container (not shown in the figure) of the potting material through a pipeline, the potting material in the storage container can be pumped to the potting gun 21 by a working pump (not shown in the figure), and the potting material flows out from the potting gun 21 to achieve potting of the capacitor, an ultrasonic generator 22 and an electric heater 23 are respectively installed on the inner top wall of the potting box 2 at the periphery of the potting gun 21, a vacuum suction pipe 24 communicating with the inside of the potting box 2 is installed on the top of the potting box 2, the vacuum suction pipe 24 is connected to a vacuum pump (not shown in the figure), and when the vacuum pump works, it is convenient to pump the inside of the potting box 2 to a vacuum state under the guiding effect of the vacuum suction pipe 24. Empty; a double-axis moving group 3 is provided on the inner bottom wall of the potting box 2, and a placement seat 4 is provided inside the potting box 2 through the double-axis moving group 3. A jig seat 5 for placing a capacitor shell is provided above the placement seat 4, and placement slots for positioning and placing the capacitor are evenly distributed above the jig seat 5, and a connecting seat 51 is provided on the side of the jig seat 5; a rotating clamping mechanism 9 is installed on the guide seat 7 through a driving mechanism 8; an opening and closing mechanism 6 is provided on the side of the potting box 2 close to the guide seat 7, and an electromagnet 41 is embedded and installed on the upper surface of the placement seat 4, and the upper surface of the electromagnet 41 is flush with the upper surface of the placement seat 4; the bottom of the jig seat 5 is made of magnetic metal material. After the jig seat 5 is completely transferred from the guide seat 7 to the placement seat 4, the electromagnet 41 is energized to generate magnetic force, which cooperates with the magnetic attraction of the bottom of the jig seat 5 to fix the jig seat 5, avoid displacement of the jig seat 5 during the pouring process, improve the accuracy of the pouring position, and the electromagnet 41 is powered off and the magnetic force disappears.

[0044] See also Figure 1 , Figure 6 , Figure 7 and Figure 8A movable groove 81 is provided on the upper surface of the guide seat 7. The driving mechanism 8 is used to drive the rotating clamping mechanism 9 to translate along the length direction of the guide seat 7, and includes a threaded rod 82, a nut seat 83 and a first driving motor 84; the threaded rod 82 is rotatably installed in the movable groove 81, the first driving motor 84 is fixed to one side of the driving mechanism 8, and the output shaft of the first driving motor 84 is fixedly connected to one end of the threaded rod 82; the nut seat 83 is limitedly slidably installed in the movable groove 81, and is sleeved on the outside of the threaded rod 82, and the rotating clamping mechanism 9 is arranged on the top of the nut seat 83. The rotating clamping mechanism 9 is used to be clamped and connected with the connecting seat 51, and includes a shaft 92, a second drive motor 93, a plug rod 94 and a clamping block 95. A bracket 91 is fixed on the upper surface of the nut seat 83; the shaft 92 extending along the length direction of the guide seat 7 is rotatably mounted on the side of the bracket 91 close to the filling box 2, the second drive motor 93 is fixed on the other side of the bracket 91, and the output shaft of the second drive motor 93 is fixedly connected to one end of the shaft 92; the plug rod 94 is fixed on the shaft 92 away from the second drive On the end of the motor 93; two clamping blocks 95 are symmetrically fixed on the outer peripheral surface of the insertion rod 94; a socket 511 matching the insertion rod 94 is provided on the side of the connecting seat 51 away from the fixture seat 5, and a clearance hole 512 coaxially penetrating with the socket 511 is provided in the connecting seat 51; guide grooves 513 matching the clamping blocks 95 are symmetrically provided on both sides of the inner wall of the socket 511, and the guide grooves 513 are all penetrated with the clearance hole 512, and the inner diameter of the clearance hole 512 is greater than the distance between the inner walls of the two guide grooves 513 away from each other. The first driving motor 84 drives the threaded rod 82 to rotate forward and reversely. The rotating threaded rod 82 drives the nut seat 83 to move back and forth in the movable groove 81, and drives the rotating clamping mechanism 9 to move synchronously, and drives the rotating clamping mechanism 9 to move toward one side of the connecting seat 51 until the insertion rod 94 passes through the insertion hole 511 and is inserted into the clearance hole 512. In this process, the clamping block 95 matches and passes through the guide groove 513, and then the second driving motor 93 drives the shaft rod 92 to rotate, and drives the insertion rod 94 and the clamping block 95 to rotate. The rotating clamping block 95 is misaligned with the guide groove 513, and can be clamped and connected with the connecting seat 51, so as to drive the fixture seat 5 to move for transportation.

[0045] See also Figure 4The biaxial moving group 3 is used to drive the placement seat 4 to move along the length direction or the width direction of the body 1, and includes a first power rail 31, a first moving seat 32, a second power rail 33 and a second moving seat 34; the first power rail 31 is fixed to the inner bottom wall of the filling box 2, and the first moving seat 32 that can be translated along the width direction of the body 1 is installed on the first power rail 31; the second power rail 33 is fixed to the top of the first moving seat 32, and the second moving seat 34 that can be translated along the length direction of the body 1 is installed on the second power rail 33, and the placement seat 4 is fixed on the second moving seat 34 At the upper end, the first movable seat 32 is driven to move along the width direction of the body 1 by the first power guide rail 31, and the second movable seat 34 is driven to move along the length direction of the body 1 by the second power guide rail 33, thereby driving the placement seat 4 to perform bidirectional translation adjustment. On the one hand, it is convenient to move the jig seat 5 and facilitate the potting gun 21 to pot the capacitors at different positions on the jig seat 5. On the other hand, the second power guide rail 33 can transfer the placement seat 4 and the jig seat 5 from the box opening 201 to the outside of the potting box 2, so as to facilitate the clamping of the jig seat 5 with the rotating clamping mechanism 9.

[0046] See also Figure 2 A sliding groove 61 extending vertically upward and penetrating the inside of the potting box 2 is provided on one side of the upper surface of the potting box 2 near the box opening 201. The opening and closing mechanism 6 is used to block the box opening 201, and includes a blocking door plate 62 and an electric push cylinder 63; the blocking door plate 62 is limitedly slidably installed in the sliding groove 61, and the electric push cylinder 63 is fixed to the side of the upper end of the potting box 2 near the box opening 201, and the end of the telescopic rod of the electric push cylinder 63 is fixed to the bottom of the blocking door plate 62 through a connecting block 64. Through the extension of the telescopic rod of the electric push cylinder 63, under the connection of the connecting block 64, the blocking door plate 62 can be driven to slide downward in the sliding groove 61 to achieve the blocking effect of the box opening 201, so as to facilitate the formation of a vacuum environment in the potting box 2, and through the retraction of the telescopic rod of the electric push cylinder 63, the blocking door plate 62 can be driven to move upward, so that the box opening 201 is opened, which is convenient for the capacitor to enter and exit.

[0047] See also Figure 6 The upper surface of the guide seat 7 is symmetrically provided with mounting grooves 71 extending along the length direction of the guide seat 7 on both sides of the moving groove 81; guide rollers 72 are rotatably installed in the two mounting grooves 71, and the outer peripheral top of the guide roller 72 is flush with the upper surface of the placement seat 4. When the driving mechanism 8 works to transfer the fixture seat 5 from the placement seat 4 to the guide seat 7, the guide rollers 72 rub against the bottom of the fixture seat 5 and roll, providing a guiding effect for the fixture seat 5, which helps to transfer the fixture seat 5 more smoothly and stably.

[0048] The present invention also provides a sealing process of an ultrasonic vacuum sealing machine, using any of the above ultrasonic vacuum sealing machines, and the specific process steps are as follows:

[0049] Step 1: Loading capacitors

[0050] The jig seat 5 is placed on the guide seat 7, and the driving mechanism 8 drives the rotating clamping mechanism 9 to move toward the side of the potting box 2 until the rotating clamping mechanism 9 is clamped and connected with the connecting seat 51. Then, the capacitor housing is placed on the jig seat 5 by the robot arm, and then the driving mechanism 8 works to push the jig seat 5 to continue to move toward the side of the potting box 2 until the jig seat 5 enters above the placement seat 4 in the potting box 2, and the automatic loading of the capacitor is completed;

[0051] Step 2: Ultrasonic Vacuum Infusion

[0052] The box opening 201 is blocked by the opening and closing mechanism 6, and the inside of the potting box 2 is evacuated by the vacuum suction tube 24. Then, the potting material is poured into the shell of the capacitor by the potting gun 21. At the same time, the ultrasonic generator 22 is started to convert the high-frequency electrical energy into vibration energy, and the vibration energy is converted into ultrasonic energy through the transducer. The ultrasonic energy changes the fluidity and viscosity of the potting material, promotes the penetration and filling of the potting material, reduces bubbles, and improves the uniformity of the potting material. At the same time, the electric heater 23 is powered on for heating, and the heating temperature is 85°C. The potting material is heated and kept warm to avoid premature cooling of the potting material, which is conducive to the molding of the potting material;

[0053] Step 3: Discharging capacitors

[0054] The opening and closing mechanism 6 operates to open the box mouth 201, and the dual-axis moving group 3 operates to translate the placement seat 4 and the fixture seat 5 toward the guide seat 7. The driving mechanism 8 operates to drive the rotating clamping mechanism 9 to approach the connecting seat 51, and the rotating clamping mechanism 9 operates to clamp and fix the connecting seat 51. Subsequently, the driving mechanism 8 operates to drive the rotating clamping mechanism 9 and the connecting seat 51 to move away from the potting box 2, thereby transferring the fixture seat 5 from the placement seat 4 to the guide seat 7. After the potting material is cooled, the capacitor is transferred from the fixture seat 5 by a robotic arm, thereby realizing the unloading of the capacitor.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An ultrasonic vacuum filling machine, comprising a machine body (1), a filling box (2) being provided on one side of the upper surface of the machine body (1), a guide seat (7) being provided on the other side of the upper surface of the machine body (1), a box opening (201) for a capacitor to pass through being provided on a side of the filling box (2) close to the guide seat (7), and characterized in that: A potting gun (21) extending vertically downward is provided at the center of the inner top wall of the potting box (2); an ultrasonic generator (22) and an electric heater (23) are respectively installed on the inner top wall of the potting box (2) at the periphery of the potting gun (21); and a vacuum extraction pipe (24) communicating with the interior of the potting box (2) is installed at the top of the potting box (2); A double-axis moving group (3) is provided on the inner bottom wall of the potting box (2); a placement seat (4) is provided inside the potting box (2) through the double-axis moving group (3); a fixture seat (5) for placing a capacitor housing is provided above the placement seat (4); and a connecting seat (51) is provided on the side of the fixture seat (5); The biaxial moving group (3) is used to drive the placement seat (4) to move along the length direction of the machine body (1) or the width direction of the machine body (1); A rotating clamping mechanism (9) is installed on the guide seat (7) via a driving mechanism (8), the driving mechanism (8) is used to drive the rotating clamping mechanism (9) to translate along the length direction of the guide seat (7), and the rotating clamping mechanism (9) is used to be clamped and connected with the connecting seat (51); An opening and closing mechanism (6) for sealing the box opening (201) is provided on one side of the potting box (2) close to the guide seat (7).

2. The ultrasonic vacuum filling machine according to claim 1, characterized in that: The upper surface of the guide seat (7) is provided with a moving groove (81), and the driving mechanism (8) comprises a threaded rod (82), a nut seat (83) and a first driving motor (84); The threaded rod (82) is rotatably mounted in the movable groove (81), the first drive motor (84) is fixed to a side portion of the drive mechanism (8), and the output shaft of the first drive motor (84) is fixedly connected to one end portion of the threaded rod (82); The nut seat (83) is installed in a limited sliding manner in the movable groove (81) and is sleeved on the outside of the threaded rod (82). The rotary clamping mechanism (9) is arranged on the top of the nut seat (83).

3. The ultrasonic vacuum filling machine according to claim 2, characterized in that: The rotating clamping mechanism (9) comprises a shaft (92), a second driving motor (93), an inserting rod (94) and a clamping block (95); a bracket (91) is fixed on the upper surface of the nut seat (83); The shaft (92) extending along the length direction of the guide seat (7) is rotatably mounted on one side of the bracket (91) close to the filling box (2), the second drive motor (93) is fixed on the other side of the bracket (91), and the output shaft of the second drive motor (93) is fixedly connected to one end of the shaft (92); The insertion rod (94) is fixed to the end of the shaft rod (92) away from the second drive motor (93); The two clamping blocks (95) are symmetrically fixed on the outer peripheral surface of the insertion rod (94); The side of the connecting seat (51) away from the fixture seat (5) is provided with a socket (511) matching the insert rod (94), and the connecting seat (51) is provided with a clearance hole (512) coaxially penetrating with the socket (511); Guide grooves (513) matching the clamping block (95) are symmetrically arranged on both sides of the inner wall of the insertion hole (511); the guide grooves (513) are connected to the clearance holes (512); and the inner diameter of the clearance holes (512) is greater than the distance between the inner walls of the two guide grooves (513) that are away from each other.

4. The ultrasonic vacuum filling machine according to claim 1, characterized in that: The dual-axis moving group (3) comprises a first power guide rail (31), a first moving seat (32), a second power guide rail (33) and a second moving seat (34); The first power guide rail (31) is fixed on the inner bottom wall of the potting box (2), and the first movable seat (32) capable of translating along the width direction of the machine body (1) is installed on the first power guide rail (31); The second power guide rail (33) is fixed on the top of the first movable seat (32), the second power guide rail (33) is provided with the second movable seat (34) which can be translated along the length direction of the machine body (1), and the placement seat (4) is fixed on the upper end of the second movable seat (34).

5. The ultrasonic vacuum filling machine according to claim 1, characterized in that: A sliding groove (61) extending vertically upward and penetrating the interior of the potting box (2) is provided on one side of the upper surface of the potting box (2) close to the box opening (201); the opening and closing mechanism (6) comprises a blocking door plate (62) and an electric push cylinder (63); The blocking door panel (62) is installed in the sliding groove (61) in a limited sliding manner, and the electric push cylinder (63) is fixed to the side of the upper end of the filling box (2) close to the box opening (201), and the end of the telescopic rod of the electric push cylinder (63) is fixed to the bottom of the blocking door panel (62) through a connecting block (64).

6. The ultrasonic vacuum filling machine according to claim 2, characterized in that: The upper surface of the guide seat (7) is symmetrically provided with mounting grooves (71) extending along the length direction of the guide seat (7) on both sides of the movable groove (81); Guide rollers (72) are rotatably mounted in both mounting grooves (71), and the top of the outer periphery of the guide rollers (72) is flush with the upper surface of the placement seat (4).

7. The ultrasonic vacuum filling machine according to claim 1, characterized in that: An electromagnet (41) is embedded and installed on the upper surface of the placement seat (4), and the upper surface of the electromagnet (41) is flush with the upper surface of the placement seat (4); The bottom of the fixture seat (5) is made of a magnetic metal material.

8. A sealing process of an ultrasonic vacuum sealing machine, using the ultrasonic vacuum sealing machine according to any one of claims 1 to 7, characterized in that: The specific process steps are as follows: Step 1: Loading capacitors The jig seat (5) is placed above the guide seat (7), and the driving mechanism (8) is operated to drive the rotating clamping mechanism (9) to move toward one side of the potting box (2) until the rotating clamping mechanism (9) is clamped and connected with the connecting seat (51), and then the capacitor housing is placed on the jig seat (5) by a mechanical arm, and then the driving mechanism (8) is operated to push the jig seat (5) to continue to move toward one side of the potting box (2) until the jig seat (5) enters above the placement seat (4) in the potting box (2), thereby completing the automatic loading of the capacitor; Step 2: Ultrasonic Vacuum Infusion The box opening (201) is sealed by the operation of the opening and closing mechanism (6), the inside of the potting box (2) is evacuated by the vacuum suction tube (24), and then the potting material is poured into the shell of the capacitor by the potting gun (21), and at the same time, the ultrasonic generator (22) is started to convert high-frequency electrical energy into vibration energy, and the vibration energy is converted into ultrasonic energy by the transducer, and the ultrasonic energy changes the fluidity and viscosity of the potting material, promotes the penetration and filling of the potting material, reduces bubbles, and improves the uniformity of the potting material. At the same time, the electric heater (23) is powered on for heating, and the heating temperature is 70-100° C., so as to heat and keep the potting material warm, avoid premature cooling of the potting material, and facilitate the molding of the potting material; Step 3: Discharging capacitors The opening and closing mechanism (6) operates to open the box opening (201), and the dual-axis moving group (3) operates to translate the placement seat (4) and the fixture seat (5) toward the guide seat (7). The driving mechanism (8) operates to drive the rotating clamping mechanism (9) to approach the connecting seat (51), and the rotating clamping mechanism (9) operates to clamp and fix the connecting seat (51). Subsequently, the driving mechanism (8) operates to drive the rotating clamping mechanism (9) and the connecting seat (51) to move away from the potting box (2), thereby transferring the fixture seat (5) from the placement seat (4) to the guide seat (7). After the potting material cools, the capacitor is transferred from the fixture seat (5) by a robotic arm, thereby realizing the unloading of the capacitor.

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