Metal container polishing device

Abstract

The utility model discloses a metal container polishing device and relates to the technical field of polishing devices.The metal container polishing device comprises a polishing table and a conveying mechanism, the polishing table is connected with an outer polishing mechanism, an outer polishing taking and placing mechanism, an inner polishing mechanism and an inner polishing taking and placing mechanism, and the conveying mechanism is used for driving a metal container to sequentially pass through the outer polishing mechanism and the inner polishing mechanism; the outward throwing taking and placing mechanism is used for driving the metal containers on the conveying mechanism to move to the outward throwing mechanism or driving the metal containers on the outward throwing mechanism to move to the conveying mechanism. The inner throwing taking and placing mechanism is used for driving the metal containers on the conveying mechanism to move to the inner throwing mechanism or driving the metal containers on the inner throwing mechanism to move to the conveying mechanism. The whole polishing process does not need manual intervention, full-automatic operation is achieved, and the polishing efficiency of the metal container is improved.

Description

Technical Field

[0001] The present application relates to the technical field of polishing devices, and in particular to a polishing device for metal containers. Background Art

[0002] Polishing is a surface treatment process that removes surface irregularities through physical or chemical means to achieve a smooth, shiny finish. Polishing can be applied to a variety of materials, including metals, plastics, wood, stone, and glass. The polished surface not only enhances its appearance but also reduces friction, improves wear resistance, and reduces corrosion.

[0003] Metal containers refer to thin-walled packaging containers made of metal sheets. Because the polishing equipment for the inner and outer surfaces of metal containers is different and the polishing quality requirements are also different, multiple states and position conversions are required during internal and external polishing. Therefore, the polishing of metal containers is currently basically done by hand polishing, and the polishing equipment needs to be converted between each polishing process. The polishing efficiency is low and needs to be improved. Utility Model Content

[0004] The purpose of this application is to provide a metal container polishing device to improve the efficiency of polishing metal containers.

[0005] A metal container polishing device provided in the present application adopts the following technical solution: it includes a polishing table and a transmission mechanism, the polishing table is connected to an external polishing mechanism, an external polishing pick-up mechanism, an internal polishing mechanism and an internal polishing pick-up mechanism, the transmission mechanism is used to drive the metal container to pass through the external polishing mechanism and the internal polishing mechanism in sequence, the external polishing pick-up mechanism is used to drive the metal container on the transmission mechanism to move to the external polishing mechanism or drive the metal container on the external polishing mechanism to move to the transmission mechanism, and the internal polishing pick-up mechanism is used to drive the metal container on the transmission mechanism to move to the internal polishing mechanism or drive the metal container on the internal polishing mechanism to move to the transmission mechanism.

[0006] By adopting the above technical solution, the metal container is transported by the transmission mechanism, the external polishing pick-up and placement mechanism moves the metal container on the transmission mechanism to the external polishing mechanism, the external polishing mechanism polishes the outer surface of the metal container, and when the metal container is polished, the external polishing pick-up and placement mechanism moves the metal container on the external polishing mechanism back to the transmission mechanism, and the transmission mechanism drives the polished metal container toward the direction close to the internal polishing mechanism. The internal polishing pick-up and placement mechanism moves the metal container on the transmission mechanism to the internal polishing mechanism, and the internal polishing mechanism polishes the inner surface of the metal container. When the metal container is polished, the internal polishing pick-up and placement mechanism moves the metal container on the internal polishing mechanism back to the transmission mechanism, and the transmission mechanism moves the metal container after both the inside and the outside are polished to the next station. The entire polishing process does not require manual intervention and is fully automated, thereby improving the efficiency of metal container polishing.

[0007] Optionally, the external throwing and placing mechanism includes a first carrier plate slidably connected to the polishing table, a first connecting plate rotatably connected to the first carrier plate, a suction cup connected to the first connecting plate and a first driving member for driving the first connecting plate to rotate, the first driving member is connected to the first carrier plate, and the first carrier plate can slide along the directions of the X-axis, Y-axis, and Z-axis.

[0008] By adopting this technical solution, the suction cup easily absorbs and releases the metal container, and the first carrier plate slides along the X-axis, Y-axis, and Z-axis. That is, the suction cup and the metal container move with the movement of the first carrier plate, facilitating the movement of the metal container to the ejection mechanism. The first driving member drives the first connecting plate to rotate, adjusting the angle of the metal container, making it easier to place the metal container into the ejection mechanism.

[0009] Optionally, two suction cups are connected to the first connecting plate, and the two suction cups form an angle.

[0010] By adopting the above technical solution, during the process of polishing the metal container by the external polishing mechanism, one of the suction cups sucks the unpolished metal container. When the metal container on the external polishing mechanism is polished, the other suction cup removes the polished metal container. The first driving member drives the first connecting plate to rotate so that the unpolished metal container corresponds to the external polishing mechanism. The first carrier plate moves and the unpolished metal container is placed in the external polishing mechanism. The first carrier plate only needs to move once to replace the metal container, thereby improving the overall polishing efficiency of the metal container. The external polishing mechanism continues to polish the unpolished metal container. During this process, the first carrier plate moves to the transmission mechanism, and the suction cup releases the polished metal container, causing it to move toward the inner polishing mechanism.

[0011] Optionally, the external polishing mechanism includes an external polishing assembly connected to the polishing table, a first sliding plate slidingly connected to the polishing table, an internal tensioning member rotatably connected to the first sliding plate, and a second driving member for driving the internal tensioning member to rotate, the second driving member is connected to the first sliding plate, and the first sliding plate can slide along the X-axis and Y-axis directions.

[0012] By adopting the above technical solution, the internal tensioning member tensions the inner wall of the metal container, and the first sliding plate slides along the X-axis and Y-axis, so that the metal container moves to the external polishing assembly, and the second driving member drives the internal tensioning member to rotate, that is, the metal container rotates, which facilitates polishing the outer surface of the metal container.

[0013] Optionally, the transmission mechanism includes a transmission frame, a transmission belt rotatably connected to the transmission frame, and a driving assembly for driving the transmission belt to rotate, the driving assembly is connected to the transmission frame, and the transmission frame is connected to two positioning rods, and the distance between the two positioning rods decreases step by step along the moving direction of the metal container.

[0014] By adopting the above technical solution, the two positioning rods guide the movement of the metal container, so that the metal container abuts against the two positioning rods at the same time, which facilitates the metal container to move to the corresponding position.

[0015] Optionally, the transmission frame is rotatably connected to a rotating rod, the transmission frame is fixedly connected to a third driving member for driving the rotating rod to rotate, the rotating rod is fixedly connected to a clamping member, and the rotating rod is located between the external throwing mechanism and the internal throwing mechanism.

[0016] By adopting the above technical solution, the clamping member clamps the metal container, and the third driving member drives the rotating rod to rotate, that is, the metal container rotates around the axis of the rotating rod, and the metal container flips 180°, so that the opening of the metal container faces upward, making it easier for the internal throwing mechanism to drive the metal container to move to the internal throwing mechanism.

[0017] Optionally, the transmission frame is slidably connected to a baffle and an oil spray member, and the transmission frame is connected to a fourth driving member and a fifth driving member, the fourth driving member is used to drive the baffle to slide toward or away from the transmission belt, and the fifth driving member is used to drive the oil spray member to slide toward or away from the transmission belt, the oil spray member is located between the baffle and the rotating rod, and the baffle is located between the oil spray member and the inner throwing mechanism.

[0018] By adopting the above technical solution, the fourth driving member drives the baffle to slide toward the direction close to the conveyor belt, and the baffle can abut against the metal container and limit the movement of the metal container. The fifth driving member drives the oil sprayer to slide toward the direction close to the conveyor belt, so that the oil sprayer is inserted into the metal container. The oil sprayer sprays lubricating oil into the metal container. The lubricating oil can take away the heat generated by friction from the surface of the metal container, help dissipate heat, and prevent overheating.

[0019] Optionally, two baffle columns are arranged at intervals between the baffles.

[0020] By adopting the above technical solution, the metal container abuts against the two stop posts at the same time, and the conveyor belt makes the metal container maintain the tendency to move toward the inner throwing mechanism. Part of the metal container is stuck between the two stop posts. The two stop posts limit the movement of the metal container perpendicular to the moving trajectory of the conveyor belt, thereby improving the stability of the metal container on the conveyor belt.

[0021] Optionally, the external throwing pick-up and placement mechanism includes a second carrier plate slidably connected to the polishing table, a second connecting plate rotatably connected to the second carrier plate, a pick-up and placement assembly connected to the second connecting plate, and a sixth driving member for driving the second connecting plate to rotate, the sixth driving member is connected to the second carrier plate, and the second carrier plate can slide along the directions of the X-axis, Y-axis, and Z-axis.

[0022] By employing this technical solution, the pick-and-place assembly grasps or releases the metal container, and the second carrier plate slides along the X, Y, and Z axes. This allows the pick-and-place assembly and the metal container to move with the second carrier plate, facilitating the movement of the metal container into the inner-throwing mechanism. The sixth drive member rotates the second connecting plate, adjusting the angle of the metal container and making it easier to place the metal container into the inner-throwing mechanism.

[0023] Optionally, the internal throwing mechanism includes an external clamping member rotatably connected to the polishing table, a second sliding plate slidably connected to the polishing table, an internal throwing assembly connected to the second sliding plate, and a seventh driving member for driving the external clamping member to rotate, the seventh driving member is connected to the polishing table, and the second sliding plate can slide along the X-axis and Y-axis directions.

[0024] By adopting the above technical solution, the outer clamping member clamps the outer surface of the metal container, and the second sliding plate slides along the X-axis and Y-axis directions, so that the inner polishing assembly moves into the metal container, so that the inner polishing assembly abuts against the inner wall of the metal container, and the seventh driving member drives the outer clamping member to rotate, that is, the metal container rotates, which facilitates polishing the inner surface of the metal container.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The entire polishing process does not require manual intervention and is fully automated, which improves the efficiency of polishing metal containers.

[0027] 2. During the polishing process, one of the suction cups holds an unpolished container. Once the container is polished, the other suction cup removes the polished container. The first driver rotates the first connecting plate, aligning the unpolished container with the polishing mechanism. The first carrier plate then moves, placing the unpolished container into the polishing mechanism. The first carrier plate only needs to be moved once to replace the container, improving the overall polishing efficiency of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the overall structural diagrams of an embodiment of the present application, showing a limit rod.

[0029] Figure 2 yes Figure 1Magnified view of area A.

[0030] Figure 3 This is the second schematic diagram of the overall structure of the embodiment of the present application, showing the bracket.

[0031] Figure 4 yes Figure 3 Magnified view of area B.

[0032] Figure 5 This is one of the partial structural diagrams of an embodiment of the present application, showing the external throwing and placing mechanism.

[0033] Figure 6 This is the second partial structural diagram of an embodiment of the present application, showing the external throwing mechanism.

[0034] Figure 7 This is the third partial structural diagram of the embodiment of the present application, showing the internal throwing and placing mechanism.

[0035] Explanation of reference numerals: 1. polishing table; 2. transmission mechanism; 21. transmission frame; 22. transmission belt; 23. limiting rod; 24. positioning rod; 25. support plate; 251. sensor; 26. rotating rod; 261. clamping member; 27. third driving member; 28. bracket; 281. baffle; 2811. baffle column; 282. mounting plate; 2821. oil spraying member; 283. fourth driving member; 284. fifth driving member; 3. external throwing mechanism; 31. External polishing assembly; 311, external polishing disc; 312, second motor; 32, first sliding plate; 33, internal tensioning member; 4, external polishing pick-up and placement mechanism; 41, first carrier plate; 42, first connecting plate; 43, suction cup; 5, internal polishing mechanism; 51, external clamping member; 52, second sliding plate; 53, internal polishing assembly; 531, internal polishing wheel; 532, third motor; 6, internal polishing pick-up and placement mechanism; 61, second carrier plate; 62, second connecting plate; 63, pick-up and placement assembly. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 -Attached Figure 7 This application is described in further detail.

[0037] The embodiment of the present application discloses a metal container polishing device.

[0038] like Figure 1As shown, it includes a polishing table 1 and a transmission mechanism 2, the polishing table 1 is located on one side of the transmission mechanism 2, the transmission mechanism 2 includes a transmission frame 21 fixed on the ground, a transmission belt 22 rotatably connected to the transmission frame 21 and a driving component for driving the transmission belt 22 to rotate, the driving component includes two transmission rollers connected to the transmission frame 21 for relative rotation and a first motor for driving one of the transmission rollers to rotate, the transmission belt 22 is sleeved on the two transmission rollers, the first motor is fixedly connected to the transmission frame 21, one end of one of the transmission rollers close to the first motor is fixedly connected to the output end of the first motor, the first motor is externally connected to a controller (not shown in the drawings), and the signal output end of the controller is connected to the signal input end of the first motor.

[0039] Combine Figure 1 and Figure 2 As shown, the transmission frame 21 is relatively fixedly connected to two limit rods 23, and the metal container slides between the two limit rods 23. The transmission frame 21 is fixedly connected to four positioning rods 24, with each two positioning rods 24 forming a group, and the distance between the two positioning rods 24 gradually decreases along the movement direction of the metal container. The transmission frame 21 is fixed with two support plates 25, one support plate 25 corresponding to a group of positioning rods 24, and the support plate 25 is fixedly connected to a sensor 251, which is located between the two positioning rods 24. The transmission frame 21 is rotatably connected to a rotating rod 26, which is located between the two groups of positioning rods 24, with one support plate 25 located between the corresponding group of positioning rods 24 and the transmission frame 21. The transmission frame 21 is fixedly connected to a third driving member 27 for driving the rotating rod 26 to rotate. The third driving member 27 is a motor, and the end of the rotating rod 26 near the third driving member 27 is fixedly connected to the output end of the third driving member 27. A clamping member 261 is fixedly connected to the outer peripheral surface of the rotating rod 26 . The clamping member 261 is a finger cylinder. The signal output end of the clamping member 261 is connected to the signal input end of the controller.

[0040] Combine Figure 2 and Figure 3As shown, the transmission frame 21 is fixedly connected to a bracket 28, which is located between the rotating rod 26 and one set of positioning rods 24. Metal containers pass through the rotating rod 26 and the bracket 28 in sequence. The bracket 28 is slidably connected to a baffle 281 and a mounting plate 282, which are located between the baffle 281 and the rotating rod 26. The bracket 28 is fixedly connected to a fourth driving member 283 for driving the baffle 281 to slide toward or away from the conveyor belt 22, and a fifth driving member 284 for driving the mounting plate 282 to slide toward or away from the conveyor belt 22. The fourth driving member 283 is a pneumatic cylinder, and the signal output end of the controller is connected to the signal input end of the fourth driving member 283. The side of the baffle 281 near the fourth driving member 283 is fixedly connected to the output end of the fourth driving member 283. Two stop posts 2811 are spaced apart on the side of the baffle 281 near the conveyor belt 22. The two stop posts 2811 are integrally formed with the baffle 281 and are disposed opposite each other. The fifth driving member 284 is a cylinder, the signal output end of the controller is connected to the output end and input end of the fifth driving member 284, the side of the mounting plate 282 close to the fifth driving member 284 is fixedly connected to the output end of the fifth driving member 284, and the mounting plate 282 is connected to the oil injection member 2821.

[0041] Combine Figure 5 and Figure 6 As shown, the upper surface of the polishing table 1 is connected with an external throwing mechanism 3, an external throwing pick-up mechanism 4, an internal throwing mechanism 5 and an internal throwing pick-up mechanism 6, wherein one group of positioning rods 24 and one of the sensors 251 correspond to the external throwing mechanism 3 and the external throwing pick-up mechanism 4, and another group of positioning rods 24 and another sensor 251 correspond to the internal throwing mechanism 5 and the internal throwing pick-up mechanism 6, and the metal container passes through the external throwing mechanism 3 and the internal throwing mechanism 5 in sequence. The external throwing pick-up mechanism 4 includes a first carrier plate 41 slidably connected to the polishing table 1, a first connecting plate 42 rotatably connected to the first carrier plate 41, two suction cups 43 fixedly connected to the first connecting plate 42 and a first driving member for driving the first connecting plate 42 to rotate, the first driving member fixedly connected to the first carrier plate 41, the first driving member is a motor, the signal output end of the controller is connected to the signal input end of the first driving member, the side of the first connecting plate 42 close to the first driving member is fixedly connected to the output end of the first driving member, and the angle between the two suction cups 43 is 90°. The first carrier plate 41 can slide along the X-axis, Y-axis and Z-axis directions. How the first carrier plate 41 slides is a prior art (such as the gantry with publication number CN118083640A, which uses this method to drive the first carrier plate 41 to slide along the X-axis, Y-axis and Z-axis directions).

[0042] like Figure 6As shown, the external polishing mechanism 3 includes an external polishing assembly 31 connected to the polishing table 1, a first sliding plate 32 slidingly connected to the polishing table 1, an internal tensioning member 33 rotatably connected to the first sliding plate 32, and a second driving member for driving the internal tensioning member 33 to rotate. The external polishing assembly 31 includes an external polishing disk 311 rotatably connected to the polishing table 1 and a second motor 312 for driving the external polishing disk 311 to rotate. The second motor 312 is fixedly connected to the polishing table 1, the signal output end of the controller is connected to the signal input end of the second motor 312, and the side of the external polishing disk 311 close to the second motor 312 is fixedly connected to the output end of the second motor 312. The first sliding plate 32 is capable of sliding along the X-axis and Y-axis. The polishing table 1 is slidably connected to a plate. A cylinder, motor, and screw can be used to drive the plate to slide along the X-axis. The first sliding plate 32 is slidably connected to the plate. Alternatively, a cylinder, motor, and screw can be used to drive the first sliding plate 32 to slide along the Y-axis, thereby enabling the first sliding plate 32 to slide along the X-axis and Y-axis. A second drive member is fixedly connected to the first sliding plate 32. The second drive member is a motor. The signal output of the controller is connected to the signal input of the second drive member. An internal tensioning member 33 is fixedly connected to the output of the second drive member. The internal tensioning member 33 is a three-jaw cylinder that can tighten or loosen the inner wall of the metal container.

[0043] Combine Figure 6 and Figure 7 As shown, the internal polishing pick-up and placement mechanism 6 includes a second carrier plate 61 that is slidably connected to the polishing table 1, a second connecting plate 62 that is rotatably connected to the second carrier plate 61, a pick-up and placement assembly 63 that is relatively fixedly connected to the second connecting plate 62, and a sixth drive member for driving the second connecting plate 62 to rotate. The sixth drive member uses a motor, worm gear, and worm to drive the second connecting plate 62 to rotate. The sixth drive member is connected to the second carrier plate 61, and the signal output end of the controller is connected to the signal input end of the sixth drive member. The pick-up and placement assembly 63 has a four-claw structure. The pick-up and placement assembly 63 drives the four claws to move toward or away from each other through a drive mechanism (such as a motor or cylinder, not shown in the figure) to achieve the picking and placing of the metal container. The second carrier plate 61 can slide along the X-axis, Y-axis, and Z-axis directions. The sliding mode of the second carrier plate 61 is the same as the sliding mode of the first carrier plate 41.

[0044] Combine Figure 6 and Figure 7As shown, the inner polishing mechanism 5 includes an outer clamping member 51 rotatably connected to the polishing table 1, a second sliding plate 52 slidingly connected to the polishing table 1, an inner polishing assembly 53 connected to the second sliding plate 52, and a seventh driving member for rotating the outer clamping member 51. The seventh driving member is fixedly connected to the polishing table 1. The seventh driving member is a motor. The signal output end of the controller is connected to the signal input end of the seventh driving member. The outer clamping member 51 is fixedly connected to the output end of the seventh driving member. The outer clamping member 51 is a three-claw cylinder. The outer clamping member 51 can clamp or loosen the outer surface of the metal container. The inner polishing assembly 53 includes an inner polishing wheel 531 rotatably connected to the second sliding plate 52 and a third motor 532 for driving the inner polishing wheel 531 to rotate. The third motor 532 is fixedly connected to the second sliding plate 52. The signal output end of the controller is connected to the signal input end of the third motor 532. The side of the inner polishing wheel 531 close to the third motor 532 is fixedly connected to the output end of the third motor 532. The second sliding plate 52 can slide along the X-axis and the Y-axis. The sliding mode of the second sliding plate 52 is the same as that of the first sliding plate 32 .

[0045] The implementation principle of a metal container polishing device according to an embodiment of the present application is as follows:

[0046] A metal container is placed on the conveyor belt 22, positioned between two stop rods 23, with its opening facing the conveyor belt 22. A first motor drives the conveyor rollers, which in turn drive the metal container along the conveyor belt 22 until it contacts one of the positioning rods 24. Sensor 251 senses the metal container. One of the suction cups 43 holds the metal container, and the first carrier plate 41 moves the container. The first connecting plate 42 of the first driving member rotates, causing the internal tensioning member 33 to engage the metal container, tightening the tensioning member 33.

[0047] The first sliding plate 32 slides, driving the outer surface of the metal container into contact with the outer polishing disk 311. The controller activates the second motor 312 and the second drive member, causing the outer polishing disk 311 to polish the outer surface of the metal container. During this process, one of the suction cups 43 retains the unpolished metal container. Once the metal container on the inner tensioning member 33 is polished, the inactive suction cup 43 retains the polished metal container. The first connecting plate 42 of the first drive member rotates, mounting the unpolished metal container on the inner tensioning member 33, and the outer polishing mechanism 3 continues polishing the metal container.

[0048] The first carrier plate 41 places the polished metal container back onto the conveyor belt 22. The conveyor belt 22 drives the metal container toward the rotating rod 26. The clamping member 261 clamps the metal container. The third driving member 27 drives the rotating rod 26 to rotate, causing the metal container to flip 180°, with its opening facing away from the conveyor belt 22. The clamping member 261 releases the metal container, and the conveyor belt 22 drives the metal container toward the baffle 281. The fourth driving member 283 drives the baffle 281 to slide toward the conveyor belt 22, allowing the metal container to abut against two stop posts 2811, which restrict the metal container's movement. The fifth driving member 284 drives the mounting plate 282 to slide toward the conveyor belt 22, allowing the oil spraying member 2821 to extend into the metal container and spray lubricating oil into the metal container.

[0049] One of the pick-and-place assemblies 63 clamps the metal container, the second carrier plate 61 drives the metal container to move, and the sixth driver drives the second connecting plate 62 to rotate, causing the metal container to move to the outer clamping member 51, which then clamps the metal container. The second sliding plate 52 moves and drives the inner polishing wheel 531 to move, causing the inner polishing wheel 531 to abut against the inner wall of the metal container. The controller controls the third motor 532 and the seventh driver to turn on, causing the inner polishing wheel 531 to polish the inner wall of the metal container. During the polishing process, one of the pick-and-place assemblies 63 clamps the unpolished metal container. After the metal container is polished, the inactive pick-and-place assembly 63 clamps the polished metal container. The sixth driver drives the second connecting plate 62 to rotate, causing the second carrier plate 61 to move, enabling the metal container to be replaced, and the inner polishing mechanism 5 continues polishing. The second carrier plate 61 moves and drives the polished metal container to the conveyor 22. The pick-and-place assembly 63 releases the metal container, and the conveyor 22 moves the metal container to the next station.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A metal container polishing device, characterized in that: The invention comprises a polishing table (1) and a transmission mechanism (2), wherein the polishing table (1) is connected to an external throwing mechanism (3), an external throwing pick-up mechanism (4), an internal throwing mechanism (5) and an internal throwing pick-up mechanism (6), wherein the transmission mechanism (2) is used to drive a metal container to pass through the external throwing mechanism (3) and the internal throwing mechanism (5) in sequence, wherein the external throwing pick-up mechanism (4) is used to drive a metal container on the transmission mechanism (2) to move to the external throwing mechanism (3) or to drive a metal container on the external throwing mechanism (3) to move to the transmission mechanism (2), and wherein the internal throwing pick-up mechanism (6) is used to drive a metal container on the transmission mechanism (2) to move to the internal throwing mechanism (5) or to drive a metal container on the internal throwing mechanism (5) to move to the transmission mechanism (2).

2. The metal container polishing device according to claim 1, characterized in that: The external casting pick-up and place mechanism (4) comprises a first carrier plate (41) slidably connected to the polishing table (1), a first connecting plate (42) rotatably connected to the first carrier plate (41), a suction cup (43) connected to the first connecting plate (42), and a first driving member for driving the first connecting plate (42) to rotate, wherein the first driving member is connected to the first carrier plate (41), and the first carrier plate (41) can slide along the directions of the X axis, the Y axis, and the Z axis.

3. The metal container polishing device according to claim 2, characterized in that: Two suction cups (43) are connected to the first connecting plate (42), and the two suction cups (43) form an angle.

4. The metal container polishing device according to claim 1, characterized in that: The external polishing mechanism (3) comprises an external polishing assembly (31) connected to the polishing table (1), a first sliding plate (32) slidably connected to the polishing table (1), an internal tensioning member (33) rotatably connected to the first sliding plate (32), and a second driving member for driving the internal tensioning member (33) to rotate, wherein the second driving member is connected to the first sliding plate (32), and the first sliding plate (32) can slide along the directions of the X axis and the Y axis.

5. The metal container polishing device according to claim 1, characterized in that: The transmission mechanism (2) comprises a transmission frame (21), a transmission belt (22) rotatably connected to the transmission frame (21), and a driving assembly for driving the transmission belt (22) to rotate, wherein the driving assembly is connected to the transmission frame (21), and the transmission frame (21) is connected to two positioning rods (24), and the distance between the two positioning rods (24) decreases step by step along the moving direction of the metal container.

6. The metal container polishing device according to claim 5, characterized in that: The transmission frame (21) is rotatably connected to a rotating rod (26), the transmission frame (21) is fixedly connected to a third driving member (27) for driving the rotating rod (26) to rotate, the rotating rod (26) is fixedly connected to a clamping member (261), and the rotating rod (26) is located between the external throwing mechanism (3) and the internal throwing mechanism (5).

7. The metal container polishing device according to claim 6, characterized in that: The transmission frame (21) is slidably connected to a baffle (281) and an oil spraying member (2821). The transmission frame (21) is connected to a fourth driving member (283) and a fifth driving member (284). The fourth driving member (283) is used to drive the baffle (281) to slide in a direction close to or away from the transmission belt (22). The fifth driving member (284) is used to drive the oil spraying member (2821) to slide in a direction close to or away from the transmission belt (22). The oil spraying member (2821) is located between the baffle (281) and the rotating rod (26), and the baffle (281) is located between the oil spraying member (2821) and the inner throwing mechanism (5).

8. The metal container polishing device according to claim 7, characterized in that: The baffle (281) is provided with two baffle columns (2811) at intervals.

9. The metal container polishing device according to claim 1, characterized in that: The external polishing pick-up and placement mechanism (4) comprises a second carrier plate (61) slidably connected to the polishing table (1), a second connecting plate (62) rotatably connected to the second carrier plate (61), a pick-up and placement assembly (63) connected to the second connecting plate (62), and a sixth driving member for driving the second connecting plate (62) to rotate, wherein the sixth driving member is connected to the second carrier plate (61), and the second carrier plate (61) can slide along the directions of the X axis, the Y axis, and the Z axis.

10. The metal container polishing device according to claim 1, characterized in that: The inner-throwing mechanism (5) comprises an outer clamping member (51) rotatably connected to the polishing table (1), a second sliding plate (52) slidably connected to the polishing table (1), an inner-throwing assembly (53) connected to the second sliding plate (52), and a seventh driving member for driving the outer clamping member (51) to rotate, wherein the seventh driving member is connected to the polishing table (1), and the second sliding plate (52) can slide along the directions of the X axis and the Y axis.

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