Powder ton bag top extrusion shaping device and method

Abstract

The invention relates to a powder ton bag top extruding and shaping device which comprises a conveying frame, a horizontal conveying device arranged on the conveying frame and a tray arranged on the horizontal conveying device, the horizontal conveying device is used for horizontally conveying the tray in the length direction of the conveying frame, the tray is used for containing a ton bag containing powder, and the powder ton bag top extruding and shaping device is characterized by further comprising a shaping frame. A lifting device is arranged on the shaping frame, a frame is arranged at the lower end of the lifting device and located above the horizontal conveying device, a pressing plate is arranged at the lower end of the frame, the lifting device is used for driving the frame to move up and down, and a centering mechanism used for centering trays is further arranged on the conveying frame. An automatic hooking mechanism is arranged at the upper end of the frame and used for being connected with or separated from a lifting lug of the ton bag in a hooking mode. The lifting device drives the ton bag to impact the tray in a reciprocating mode to achieve bag bumping and compaction, then the pressing plate extrudes the top, and the powder compactness and the top flatness of the ton bag are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material packaging auxiliary technology, in particular to a device and method for extruding and shaping the top of a powder material ton bag. Background Art

[0002] Ton bags are often used for packaging and transporting powders. However, due to the powder's fluidity and other characteristics, the powder can easily accumulate unevenly at the top of the bag, affecting its stacking stability. To save transportation space, two bags are often stacked together for transportation, which can also cause safety issues during transportation due to unstable center of gravity. Furthermore, an uneven top is also detrimental to subsequent sealing operations and film wrapping and taping. Therefore, a device that can effectively squeeze and shape the top of powder ton bags is needed to address these issues. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a device and method for extruding and shaping the top of a powder ton bag, so as to solve the problem of uneven top of a powder ton bag in the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a top extrusion and shaping device for powder ton bags includes a conveyor frame, a horizontal conveying device arranged on the conveyor frame and a pallet arranged on the horizontal conveying device. The horizontal conveying device is used to horizontally convey the pallet along the length direction of the conveyor frame, and the pallet is used to place ton bags containing powder. It is characterized in that it also includes a shaping frame, and the shaping frame is provided with a lifting device. The lower end of the lifting device is located above the horizontal conveying device and is provided with a frame. The lower end of the frame is provided with a pressure plate. The lifting device is used to drive the frame to move up and down. The conveyor frame is also provided with a centering mechanism for centering the pallet; an automatic hook mechanism is provided at the upper end of the frame, and the automatic hook mechanism is used to hook or detach with the lifting ear of the ton bag.

[0005] Furthermore, the horizontal conveying device includes a roller conveyor.

[0006] Furthermore, a mounting plate is provided at the upper end of the shaping frame, and a lifting hydraulic cylinder is provided at the upper end of the mounting plate. The piston rod of the lifting hydraulic cylinder slides through the mounting plate and the end is hinged to the upper end of the frame. A linear bearing is also provided on the mounting plate, and a guide rod is slidably provided in the linear bearing. The lower end of the guide rod passes through the mounting plate and is connected to the frame.

[0007] Furthermore, there are four guide rods arranged in a rectangular structure, and two adjacent guide rods are connected by a connecting plate to form a rectangular frame, and the orthographic projection of the lifting hydraulic cylinder is located in the rectangular frame.

[0008] Furthermore, the automatic hooking mechanism includes a first rotating shaft and a second rotating shaft which are arranged to rotate relative to each other, two first hooks are rotatably provided on the first rotating shaft, and two second hooks are rotatably provided on the second rotating shaft, a connecting rod is hingedly provided between the first rotating shaft and the second rotating shaft, and the hook directions of the first hook and the second hook on the same side are arranged relative to each other, and a driving mechanism is provided on the frame, which is used to drive the first rotating shaft to rotate so that the first hook and the second hook opposite to each other on the same side are close to or separated from each other, thereby realizing hooking or detachment with the lifting ear.

[0009] Furthermore, two first rockers are provided opposite to each other along the length direction on the first rotating shaft, and the first hook is provided on the first rocker; two second rockers are provided opposite to each other on the second rotating shaft, and the second hook is provided on the second rocker; the two connecting rods are staggered in an X shape, one end of which is hinged to the first rocker on the same side, and the other end is hinged to the second rocker on the same side.

[0010] Furthermore, the driving mechanism includes a positioning plate arranged at the upper end of the frame and a driving cylinder hingedly arranged on the positioning plate, a hinge rod is provided in the middle of the first rotating shaft, and the end of the piston rod of the driving cylinder is hinged to the hinge rod.

[0011] Furthermore, a positioning sleeve cooperating with the guide rod is provided on the positioning plate, and the positioning sleeve is fixedly connected to the guide rod.

[0012] Furthermore, the centering mechanism includes two centering hydraulic cylinders arranged opposite to each other, and the ends of the piston rods of the centering hydraulic cylinders are provided with centering plates facing the pallet.

[0013] The present application also provides a shaping method of a powder material ton bag top extrusion shaping device, which uses the above-mentioned device and includes the following steps: S1. The ton bag containing the powder and the tray underneath it are transported to the predetermined working position directly below the pressing plate through the horizontal conveying device; S2. performing a centering operation on the pallet located at the predetermined working position by using a centering mechanism; S3. The lifting device drives the frame to move the automatic hook mechanism downward to an operating height suitable for hooking; then, the automatic hook mechanism is hooked to the lifting lug on the top of the ton bag; S4. The lifting device drives the frame to move the suspended ton bag up and down. During the up and down reciprocating movement, the bottom of the ton bag periodically hits the tray below, generating a vibration effect, making the powder in the ton bag dense. After the vibration operation is completed, the lifting device drives the frame to descend, and the ton bag is placed stably on the tray; S5. Disengage the lifting lug on the top of the ton bag through the automatic hook mechanism; S6. The lifting device drives the frame to move the pressure plate connected to it downward. The pressure plate contacts and continuously squeezes the loose powder on the top of the ton bag downward to achieve extrusion and shaping of the top of the ton bag.

[0014] The beneficial effects of this application are: 1. This application automates the entire process from conveying, centering, hooking, compaction to extrusion and shaping, reducing manual intervention and greatly improving operating efficiency.

[0015] 2. The lifting device adopts a combination of hydraulic cylinder and guide rod, and the automatic hook mechanism moves synchronously through the X-shaped connecting rod. The equipment has strong operating stability and low failure rate.

[0016] 3. This application uses a lifting device to drive the ton bag to reciprocate and hit the pallet to achieve compaction, and then squeezes the top through the pressing plate, which greatly improves the density of the powder and the flatness of the top of the ton bag.

[0017] 4. This application uses a lifting device to drive the ton bag to hit the pallet back and forth to achieve the bag-topping operation, and cooperates with the automatic hook mechanism to ensure uniform force. When tossing the bag, the ton bag hits the pallet back and forth to separate the gas in the powder more thoroughly, fully discharge the gas, and toss the bag more tightly, effectively avoiding the problem of stacked bags tilting and tipping due to gas expansion, thereby ensuring transportation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a front view of the present invention.

[0020] Figure 3 The automatic hook mechanism of the present invention is hooked with the lifting lug of the ton bag.

[0021] Figure 4 It is a schematic diagram of the pressing plate of the present invention squeezing the top of the ton bag to shape it.

[0022] Figure 5 It is a structural diagram of the automatic hook mechanism in the present invention.

[0023] Figure 6 It is a front view of the automatic hook mechanism of the present invention.

[0024] Graphic markings: 1. Conveyor rack, 11. Horizontal conveying device, 12. Support legs, 2. Centering mechanism, 21. Centering hydraulic cylinder, 22. Centering plate, 3. Pallet, 4. Ton bag, 41. Lifting ear, 5. Shaping rack, 6. Automatic hook mechanism, 61. First rotating shaft, 611. First hook, 612. First rocker, 613. Articulated rod, 62. Second rotating shaft, 621. Second hook, 622. Second rocker, 63. Connecting rod, 64. Driving cylinder, 65. Positioning plate, 651. Positioning sleeve, 7. Frame, 8. Press plate, 9. Lifting device, 91. Lifting hydraulic cylinder, 92. Linear bearing, 93. Guide rod, 94. Connecting plate, 10. Fixed bracket, 101. First camera, 102. Second camera. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] See also Figure 1-6 An embodiment of the present invention provides a top extrusion and shaping device for a powder ton bag, comprising a conveying frame 1, a horizontal conveying device 11 arranged on the conveying frame 1, and a tray 3 arranged on the horizontal conveying device 11. The horizontal conveying device 11 is used to horizontally convey the tray 3 along the length direction of the conveying frame 1. The tray 3 is used to place a ton bag 4 containing powder. It also includes a shaping frame 5. A lifting device 9 is provided on the shaping frame 5. The lower end of the lifting device 9 is located above the horizontal conveying device 11 and is provided with a frame 7. A pressing plate 8 is provided at the lower end of the frame 7. The lifting device 9 is used to drive the frame 7 to move up and down. The conveying frame 1 is also provided with a centering mechanism 2 for centering the tray 3; an automatic hook mechanism 6 is provided at the upper end of the frame 7, and the automatic hook mechanism 6 is used to hook or detach with the lifting ear 41 of the ton bag 4.

[0027] The horizontal conveying device 11 includes a roller conveyor to ensure smooth conveyance of the pallet 3. The roller conveyor can be an existing roller conveyor.

[0028] Combine Figure 1-4As shown, the shaping frame 5 has a mounting plate at its upper end, which is welded to the mounting plate. The shaping frame 5 has a gate-shaped structure and comprises four support columns arranged in a rectangular pattern. A support frame is mounted at the upper ends of the support columns. The support frame comprises a rectangular support frame, within which are arranged multiple horizontal and vertical beams, arranged in a grid pattern. The mounting plate is positioned in the middle of the upper end of the support frame. A lifting hydraulic cylinder 91, which can also be a pneumatic cylinder, is mounted at the upper end of the mounting plate. The piston rod of the lifting hydraulic cylinder 91 slides through the mounting plate and is hingedly connected to the upper end of the frame 7. A linear bearing 92 is also mounted on the mounting plate. A guide rod 93 slides through the linear bearing 92. The lower end of the guide rod 93 extends through the mounting plate and is connected to the frame 7. Driven by the lifting hydraulic cylinder 91 and guided by the guide rods 93, the frame 7 is raised and lowered smoothly. Four guide rods 93 are arranged in a rectangular pattern, with adjacent guide rods 93 connected by a connecting plate 94. The guide rods 93 and connecting plate 94 are bolted together. Four connecting plates 94 form a rectangular frame, with the orthographic projection of the lift hydraulic cylinder 91 located within it, enhancing the stability of the lifting structure. A rubber cushion is placed between the frame 7 and the pressure plate 8 to absorb high-frequency, small-amplitude vibrations. The frame 7 and pressure plate 8 are connected by bolts.

[0029] Combine Figure 5 and Figure 6 As shown, the automatic hook mechanism 6 includes a first rotating shaft 61 and a second rotating shaft 62, which are arranged to rotate relative to each other. The first rotating shaft 61 is rotatably provided with two first hooks 611 for engaging with the lifting lugs 41 of the ton bag 4. The second rotating shaft 62 is rotatably provided with two second hooks 621 for engaging with the lifting lugs 41 of the ton bag 4. A connecting rod 63 is hingedly connected between the first rotating shaft 61 and the second rotating shaft 62. The first hooks 611 and the second hooks 621 on the same side are arranged in opposite directions. The frame 7 is provided with a driving mechanism for driving the first rotating shaft 61 to rotate, so that the first hooks 611 and the second hooks 621 on the same side are moved closer to or apart from each other, thereby connecting or disconnecting the first hooks 611 and the second hooks 621 with the lifting lugs 41 of the ton bag 4. The four hooks are evenly distributed on the frame 7 to ensure uniform force on the ton bag 4 during the tossing process.

[0030] Specifically, first bearing seats are rotatably mounted at each end of the first rotating shaft 61 and are bolted to the frame 7. Second bearing seats are rotatably mounted at each end of the second rotating shaft 62 and are bolted to the frame 7. Two first rocker arms 612 are positioned along the length of the first rotating shaft 61, with a first hook 611 mounted on the first rocker arms 612. Two second rocker arms 622 are positioned along the length of the second rotating shaft 62, with the second hook 621 mounted on the second rocker arms 622. Two connecting rods 63 are staggered in an X-shape, one end hinged to the first rocker arm 612 on the same side, and the other end hinged to the second rocker arm 622 on the same side. Synchronous movement of the hooks is achieved through an X-shaped linkage mechanism. The first rocker arm 612 has a first through-hole for the first rotating shaft 61 to pass through, and is welded to the first rotating shaft 61. The second rocker arm 622 has a second through-hole for the second rotating shaft 62 to pass through, and is welded to the second rotating shaft 62.

[0031] The first rocker arm 612 is provided with hinge shafts on both sides of the first rotating shaft 61. The upper hinge shaft is the first hinge shaft, and the lower hinge shaft is the second hinge shaft. The second rocker arm 622 is provided with hinge columns on both sides of the second rotating shaft 62. The upper hinge column is the first hinge column, and the lower hinge column is the second hinge column. One end of one connecting rod 63 is rotatably connected to the first hinge shaft on the same side via a joint bearing, and the other end is rotatably connected to the second hinge column on the same side via a joint bearing. The other connecting rod 63 is rotatably connected to the second hinge shaft on the same side via a joint bearing, and the other end is rotatably connected to the first hinge column on the same side via a joint bearing.

[0032] The drive mechanism includes a positioning plate 65 mounted at the upper end of the frame 7 and a drive cylinder 64 hingedly mounted on the positioning plate 65. A hinged rod 613 is provided in the middle of the first rotating shaft 61, and the end of the piston rod of the drive cylinder 64 is hingedly connected to the hinged rod 613. It should be noted that any portion not described in detail in this application does not represent prior art. The drive cylinder 64 may also be a hydraulic cylinder.

[0033] In addition, the lower end of the shaping frame 5 is evenly distributed with multiple legs 12. The positioning plate 65 is provided with a positioning sleeve 651 that mates with the guide rod 93 and is fixedly connected to the guide rod 93. The positioning sleeve 651 is bolted to the guide rod 93. The centering mechanism 2 includes two opposing centering hydraulic cylinders 21. These two centering hydraulic cylinders 21 are positioned opposite each other on the conveyor frame 1 and on either side of the roller conveyor. The centering hydraulic cylinders 21 can also be pneumatic cylinders. The piston rod ends of the centering hydraulic cylinders 21 are provided with centering plates 22 that face the pallet 3. The two centering plates 22 are positioned opposite each other. The centering hydraulic cylinders 21 drive the centering plates 22 to achieve precise positioning of the pallet 3. Inclined plates extend outward on either side of the centering plates 22, forming an angle of 120-150 degrees with the inclined plates. A PLC controller is also included, to which the horizontal conveying device 11, the lifting device 9, the centering mechanism 2, and the automatic hook mechanism 6 are electrically connected.

[0034] Of course, the present invention is not limited to the above-described embodiments. Several other embodiments based on the design concept of the present invention are provided below.

[0035] For example, in other embodiments, unlike the embodiments described above, a fixed bracket 10 is provided at the front end of the shaping frame 5. The present application further includes a first camera 101 and a second camera 102. The first camera 101 is provided on the fixed bracket 10 and above the horizontal conveyor 11. The first camera 101 is used to detect whether the width of the ton bag 4 exceeds the limit. The second camera 102 is provided on one side of the shaping frame 5. The second camera 102 is used to detect whether the height of the ton bag 4 exceeds the limit. The first camera 101 and the second camera 102 are electrically connected to the PLC controller respectively.

[0036] For example, in other embodiments, different from the above-described embodiments, a plurality of supporting hydraulic cylinders are evenly distributed at the lower end of the shaping frame 5, the bottoms of the supporting hydraulic cylinders are supported on the ground, and the ends of the piston rods of the supporting hydraulic cylinders are connected to the lower end of the shaping frame 5. The supporting hydraulic cylinders are connected to a PLC controller.

[0037] The present application also provides a shaping method of a powder material ton bag top extrusion shaping device, which uses the above-mentioned powder material ton bag top extrusion shaping device, including the following steps: S1. The ton bag 4 containing the powder material and the tray 3 thereunder are conveyed to a predetermined working position directly below the pressing plate 8 by the horizontal conveying device 11.

[0038] S2. The pallet 3 at the predetermined working position is centered by the centering mechanism 2. The centering hydraulic cylinder 21 is extended synchronously, and the centering plate 22 pushes the pallet 3 to move laterally until the center line of the pallet 3 coincides with the center line of the shaping frame 5.

[0039] S3. The lifting device 9 drives the frame 7, which drives the automatic hook mechanism 6 downward to an operating height suitable for hooking. The automatic hook mechanism 6 then hooks the bag to the lifting lug 41 on the top of the ton bag 4. The piston rod of the driving cylinder 64 extends, rotating the first rotating shaft 61. The X-shaped connecting rod 63 brings the first hook 611 and the second hook 621 closer together. The first hook 611 rotates counterclockwise, while the second hook 621 rotates clockwise. The first hook 611 and the second hook 621 hook the lifting lug 41.

[0040] S4. The lifting device 9 drives the frame 7 to drive the suspended ton bag 4 to move up and down reciprocatingly. During the up and down reciprocating movement, the bottom of the ton bag 4 periodically hits the tray 3 below to realize the tossing operation. When tossing, the reciprocating impact of the ton bag 4 on the tray 3 can separate the gas in the powder more thoroughly, fully discharge the gas, produce a compaction effect, and make the powder in the ton bag 4 dense. The number of times the bottom of the ton bag 4 hits the tray 3 is 4-5 times. After the compaction operation is completed, the lifting device 9 drives the frame 7 to descend and places the ton bag 4 stably on the centered tray 3.

[0041] S5. The automatic hook mechanism 6 disengages the lifting lug 41 on the top of the ton bag 4. The piston rod of the driving cylinder 64 retracts, causing the first rotating shaft 61 to rotate. The X-shaped connecting rod 63 moves the first hook 611 and the second hook 621 away from each other. The first hook 611 rotates clockwise, while the second hook 621 rotates counterclockwise. The first hook 611 and the second hook 621 automatically disengage from the lifting lug 41.

[0042] S6. The lifting device 9 drives the frame 7 to move the pressing plate 8 connected thereto downward. The pressing plate 8 contacts and continuously squeezes the loose powder on the top of the ton bag 4 downward to achieve extrusion and shaping of the top of the ton bag 4.

[0043] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A device for extruding and shaping the top of a bulk bag of powder material, comprising a conveyor frame (1), a horizontal conveyor device (11) arranged on the conveyor frame (1), and a tray (3) arranged on the horizontal conveyor device (11), wherein the horizontal conveyor device (11) is used to horizontally convey the tray (3) along the length direction of the conveyor frame (1), and the tray (3) is used to place a bulk bag (4) containing powder material, and is characterized in that: It also includes a shaping frame (5), a lifting device (9) is provided on the shaping frame (5), a frame (7) is provided at the lower end of the lifting device (9) above the horizontal conveying device (11), a pressing plate (8) is provided at the lower end of the frame (7), the lifting device (9) is used to drive the frame (7) to move up and down, and a centering mechanism (2) for centering the tray (3) is also provided on the conveying frame (1); An automatic hook mechanism (6) is provided at the upper end of the frame (7), and the automatic hook mechanism (6) is used to be hooked to or detached from the lifting lug (41) of the ton bag (4).

2. The powder material ton bag top extrusion shaping device according to claim 1 is characterized in that: The horizontal conveying device (11) includes a roller conveyor.

3. The powder material ton bag top extrusion shaping device according to claim 1 is characterized in that: The upper end of the shaping frame (5) is provided with a mounting plate, and the upper end of the mounting plate is provided with a lifting hydraulic cylinder (91). The piston rod of the lifting hydraulic cylinder (91) slides through the mounting plate and the end is hinged to the upper end of the frame (7). The mounting plate is also provided with a linear bearing (92), and a guide rod (93) is slidably passed through the linear bearing (92). The lower end of the guide rod (93) penetrates the mounting plate and is connected to the frame (7).

4. The device for extruding and shaping the top of a powder bag according to claim 1, characterized in that: There are four guide rods (93), which are arranged in a rectangular structure. Two adjacent guide rods (93) are connected by a connecting plate (94). The four connecting plates (94) form a rectangular frame, and the orthographic projection of the lifting hydraulic cylinder (91) is located within the orthographic projection of the rectangular frame.

5. The device for extruding and shaping the top of a powder bag according to claim 1, characterized in that: The automatic hook mechanism (6) comprises a first rotating shaft (61) and a second rotating shaft (62) which are arranged to rotate relative to each other, wherein two first hooks (611) for hooking with the lifting lugs (41) of the ton bag (4) are rotatably provided on the first rotating shaft (61), and two second hooks (621) for hooking with the lifting lugs (41) of the ton bag (4) are rotatably provided on the second rotating shaft (62), and a connecting rod (63) is hingedly provided between the first rotating shaft (61) and the second rotating shaft (62), and the hook directions of the first hook (611) and the second hook (621) on the same side are arranged relative to each other, and a driving mechanism is provided on the frame (7), and the driving mechanism is used to drive the first rotating shaft (61) to rotate so that the first hook (611) and the second hook (621) on the same side are moved closer to or separated from each other, so as to realize the hooking or separation of the first hook (611) and the second hook (621) with the lifting lugs (41) of the ton bag (4).

6. The powder material ton bag top extrusion shaping device according to claim 5, characterized in that: Two first rocking arms (612) are provided on the first rotating shaft (61) along its length direction, and the first hook (611) is provided on the first rocking arm (612). Two second rocking arms (622) are provided on the second rotating shaft (62) along its length direction, and the second hook (621) is provided on the second rocking arm (622). Two connecting rods (63) are staggered in an X shape, and one end of the connecting rod (63) is hinged to the first rocking arm (612) on the same side, and the other end is hinged to the second rocking arm (622) on the same side.

7. The device for extruding and shaping the top of a powder bulk bag according to claim 5, characterized in that: The driving mechanism comprises a positioning plate (65) arranged at the upper end of the frame (7) and a driving cylinder (64) hingedly arranged on the positioning plate (65); a hinged rod (613) is provided in the middle of the first rotating shaft (61); and the end of the piston rod of the driving cylinder (64) is hingedly connected to the hinged rod (613).

8. The powder material ton bag top extrusion shaping device according to claim 5, characterized in that: The positioning plate (65) is provided with a positioning sleeve (651) that cooperates with the guide rod (93), and the positioning sleeve (651) is fixedly connected to the guide rod (93).

9. The device for extruding and shaping the top of a powder bulk bag according to claim 1, characterized in that: The centering mechanism (2) comprises two centering hydraulic cylinders (21) arranged opposite to each other, and the ends of the piston rods of the centering hydraulic cylinders (21) are provided with centering plates (22) facing the tray (3).

10. A shaping method for a powder bulk bag top extrusion shaping device, characterized in that: Adopt any one of claims 1 to 9 The powder material ton bag top extrusion shaping device comprises the following steps: S1. The ton bag (4) containing the powder material and the tray (3) below it are transported to a predetermined working position directly below the pressing plate (8) by means of a horizontal conveying device (11); S2, performing a centering positioning operation on the pallet (3) located at the predetermined working position through the centering mechanism (2); S3, driving the frame (7) through the lifting device (9) to drive the automatic hook mechanism (6) to move downward to an operating height suitable for hooking; then, the automatic hook mechanism (6) is hooked to the lifting lug (41) on the top of the ton bag (4); S4, the lifting device (9) drives the frame (7) to drive the suspended ton bag (4) to move up and down reciprocatingly. During the up and down reciprocating movement, the bottom of the ton bag (4) periodically hits the tray (3) below, generating a vibration and compacting effect, so that the powder in the ton bag (4) is compacted. After the vibration and compaction operation is completed, the lifting device (9) drives the frame (7) to descend, and the ton bag (4) is stably placed on the tray (3); S5, disengaging the lifting lug (41) on the top of the ton bag (4) through the automatic hook mechanism (6); S6. The frame (7) is driven by the lifting device (9) to drive the pressing plate (8) connected thereto to move downward, and the pressing plate (8) contacts and continuously presses downward the loose powder on the top of the ton bag (4), thereby achieving extrusion shaping of the top of the ton bag (4).

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