Bag opening mechanism of bagging machine
By setting up a bag-expanding plate structure at the four corners on the bagging machine, the problem of incomplete opening of the packaging bag mouth is solved, and the smooth feeding of materials and stable opening of the bag mouth are achieved, thus improving bagging efficiency and quality.
Patent Information
- Application Number
- CN202522431527.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-11-17
AI Technical Summary
The bag opening mechanism of traditional bagging machines can easily lead to the bag opening being too small or partially deformed, making it difficult for materials to be fed into the bag smoothly.
The bag expander uses a four-corner arrangement. After the opening of the packaging bag is sucked open by the opening nozzle, the expander extends into the bag opening and moves away from each other. With the help of a cylinder and motor, the bag opening is further expanded and stabilized.
Ensure that materials are fed smoothly and accurately into the packaging bag, improve the bagging quality, and avoid bag deformation and squeezing damage.
Smart Images
Figure CN223764846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to packaging equipment, specifically to a bag opening mechanism for a bagging machine. Background Technology
[0002] A bagging machine is a device used to automatically bag and package materials. The bag opening mechanism is a crucial component of the bagging machine. Traditional bag opening mechanisms use a suction nozzle to pick up the upward-facing portion of a horizontally placed bag and lift it up, thus opening the bag. Because this method simply suctions upwards to open the bag opening, problems such as the bag opening being too small or localized deformation of the bag opening may occur during actual use, making it difficult for subsequent materials to be smoothly fed into the bag for bagging operations. Utility Model Content
[0003] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a bag opening mechanism for a bagging machine to solve the above-mentioned problems.
[0004] Therefore, this utility model is implemented using the following solution:
[0005] A bag-opening mechanism for a bag-filling machine includes a bag conveyor belt, a first lifting frame positioned above the conveying path of the bag conveyor belt, and a bag-opening suction nozzle positioned on the first lifting frame. The mechanism is characterized by: a first bag-expanding plate, a second bag-expanding plate, a third bag-expanding plate, and a fourth bag-expanding plate arranged at four corners below the first lifting frame; the lower first bag-expanding plate is positioned on a first movable seat; the lower second bag-expanding plate is positioned on a second movable seat; the upper third bag-expanding plate is positioned on the first lifting seat; the first lifting seat is movably positioned on the first movable seat; the upper fourth bag-expanding plate is positioned on the second lifting seat; the second lifting seat is movably positioned on the second movable seat; the first and second movable seats are movably positioned on the third movable seat; the first and second movable seats are movable left and right; and the third movable seat is movable forward and backward.
[0006] The bag conveyor belt is provided with adsorption holes, and a negative pressure component is provided corresponding to the bag conveyor belt. The negative pressure component can generate negative pressure in the adsorption holes.
[0007] The first lifting seat is connected to the piston rod of the first cylinder, and the cylinder body of the first cylinder is mounted on the first movable seat. The second lifting seat is connected to the piston rod of the second cylinder, and the cylinder body of the second cylinder is mounted on the second movable seat.
[0008] It also includes a first motor, which is mounted on a third movable seat. The output end of the first motor is connected to a drive screw. The drive screw is provided with a first threaded section that is screwed to the first movable seat and a second threaded section that is screwed to the second movable seat. The helical directions of the first and second threaded sections are opposite.
[0009] It also includes a third cylinder and a fourth cylinder mounted on the frame, wherein the piston rod of the third cylinder is connected to the first lifting frame, and the piston rod of the fourth cylinder is connected to the third movable seat.
[0010] The first, second, third, and fourth bag-expanding plates are arranged in an arc shape.
[0011] The bag opening mechanism of the bagging machine described above uses four additional bag-expanding plates positioned at the four corners. After the bag opening suction nozzle opens the bag opening to a certain size, the four bag-expanding plates can extend into the bag opening and are controlled to move away from each other, further opening the bag opening. The shape of the bag opening is more stable after opening. In addition, since the bag-expanding plates are located at the corners of the bag opening, the four bag-expanding plates can create a feeding space after opening the bag to guide the material feeding, thereby ensuring that the material can be fed into the bag more smoothly and accurately, improving the bagging quality of the material. Attached Figure Description
[0012] The present invention includes the following figures:
[0013] Figure 1 This is a schematic diagram of the structure of the present invention installed in the whole machine;
[0014] Figure 2 for Figure 1 A magnified view of the area pointed to by A in the middle;
[0015] Figure 3 for Figure 1 Another perspective;
[0016] Figure 4 for Figure 3 A magnified view of the area pointed to by B. Detailed Implementation
[0017] As shown in the figure, the bag opening mechanism of a bagging machine disclosed in this utility model includes a bag conveyor belt 8. A first lifting frame 2 is arranged above the conveying path of the bag conveyor belt 8. A bag opening suction nozzle 3 is arranged on the first lifting frame 2. A first bag expanding plate 4, a second bag expanding plate 7, a third bag expanding plate 5, and a fourth bag expanding plate 6 are arranged at four corners below the first lifting frame 2. The lower first bag expanding plate 4 is arranged on a first movable seat 18. The lower second bag expanding plate 7 is arranged on a second movable seat 13. The upper third bag expanding plate 5 is arranged on a first lifting seat 19. The first lifting seat 19 is movably arranged on the first movable seat 18. The upper fourth bag expanding plate 6 is arranged on a second lifting seat 15. The second lifting seat 15 is movably arranged on the second movable seat 13. The first and second movable seats are movably arranged on a third movable seat 12. The first and second movable seats can move left and right, and the third movable seat 12 can move forward and backward.
[0018] Furthermore, the bag conveyor belt 8 is provided with adsorption holes 9, and a negative pressure component is provided corresponding to the bag conveyor belt 8. The negative pressure component can generate negative pressure in the adsorption holes 9. The negative pressure component can be a negative pressure seat, in which a negative pressure chamber is provided. The negative pressure seat is provided with an adsorption port aligned with the adsorption holes 9. The negative pressure chamber is connected to a negative pressure machine. By controlling the negative pressure machine, the negative pressure chamber generates negative pressure, which in turn generates negative pressure in the adsorption port and the adsorption holes 9 passing through the adsorption port. This ensures that the bottom of the horizontally placed packaging bag is sucked and positioned by the adsorption holes 9, so that the bag opening nozzle 3 can suck up the top of the packaging bag and move it upward to open the packaging bag.
[0019] Furthermore, the first lifting seat 19 is connected to the piston rod of the first cylinder 20, and the cylinder body of the first cylinder 20 is mounted on the first movable seat 18. The second lifting seat 15 is connected to the piston rod of the second cylinder 14, and the cylinder body of the second cylinder 14 is mounted on the second movable seat 13. With the above structure, the first lifting seat 19 can be raised and lowered by controlling the first cylinder 20, and the second lifting seat 15 can be raised and lowered by controlling the second cylinder 14.
[0020] Furthermore, it also includes a first motor 17, which is mounted on the third movable seat 12. The output end of the first motor 17 is connected to the drive screw 16. The drive screw 16 has a first threaded section that is screwed to the first movable seat 18 and a second threaded section that is screwed to the second movable seat 13. The helical directions of the first and second threaded sections are opposite. By controlling the first motor 17 to drive the drive screw 16 to rotate, the first and second movable seats can be moved closer or further apart.
[0021] Furthermore, it also includes a third cylinder 1 and a fourth cylinder 11 mounted on the frame. The piston rod of the third cylinder 1 is connected to the first lifting frame 2, and the piston rod of the fourth cylinder 11 is connected to the third movable seat 12. By controlling the third cylinder 1, the first lifting frame 2 can be raised and lowered, and by controlling the fourth cylinder 11, the third movable seat 12 can be moved left and right.
[0022] Furthermore, the first expanding plate 4, the second expanding plate 7, the third expanding plate 5, and the fourth expanding plate 6 are arranged in an arc shape. This structure allows for arc-shaped outward expansion at the four corners of the bag opening, resulting in a smoother opening and a larger contact area with the bag opening. This prevents the bag opening from being deformed or damaged due to insufficient contact surface between the bag opening and the expanding plate. Simultaneously, the arc-shaped expanding plates facilitate the guidance of materials.
[0023] The working principle of this utility model is as follows: The packaging bag is first placed horizontally on the bag conveyor belt 8 and transported to the bottom of the opening suction nozzle 3. Then, the opening suction nozzle 3 descends to suck up the top surface of the opening of the packaging bag and rises, thereby opening the opening of the packaging bag. At this time, each bag expanding plate is in a contracted state that is close to each other. The third moving seat 12 is controlled to move so that each bag expanding plate extends into the opening of the already opened packaging bag. Then, the first and second moving seats move away from each other, and the first and second lifting seats rise, so that the four bag expanding plates are in an open state that is far apart from each other, thereby realizing the secondary expansion of the opening of the packaging bag. Then, the material can be fed into the opened packaging bag under the guidance of the space enclosed by the four bag expanding plates.
Claims
1. A bag opening mechanism for a bagging machine, comprising a bag conveyor belt (8), a first lifting frame (2) disposed above the conveying path of the bag conveyor belt (8), and a bag opening suction nozzle (3) disposed on the first lifting frame (2), characterized in that: The first, second, third and fourth bag expanding plates (4, 7, 5 and 6) are arranged in a quadrangle, the lower first bag expanding plate (4) is arranged on the first moving seat (18), the lower second bag expanding plate (7) is arranged on the second moving seat (13), the upper third bag expanding plate (5) is arranged on the first lifting seat (19), the first lifting seat (19) is movably arranged on the first moving seat (18), the upper fourth bag expanding plate (6) is arranged on the second lifting seat (15), the second lifting seat (15) is movably arranged on the second moving seat (13), the first and second moving seats are movably arranged on the third moving seat (12), the first and second moving seats can move leftward and rightward, and the third moving seat (12) can move forward and backward.
2. A bag opening mechanism for a bagging machine as claimed in claim 1, wherein: The bag conveying belt (8) is provided with suction holes (9), and a negative pressure assembly is arranged correspondingly to the bag conveying belt (8), so that the suction holes (9) can generate negative pressure.
3. A bag opening mechanism for a bagging machine as defined in claim 1, wherein: The first lifting seat (19) is connected with a piston rod of a first cylinder (20), and a cylinder body of the first cylinder (20) is arranged on the first moving seat (18), the second lifting seat (15) is connected with a piston rod of a second cylinder (14), and a cylinder body of the second cylinder (14) is arranged on the second moving seat (13).
4. A bag opening mechanism for a bagging machine as defined in claim 1, wherein: The first motor (17) is arranged on the third moving seat (12), an output end of the first motor (17) is connected with a drive screw (16), the drive screw (16) is provided with a first threaded section screw-connected with the first moving seat (18) and a second threaded section screw-connected with the second moving seat (13), and the first and second threaded sections are opposite in screw direction.
5. A bag opening mechanism for a bagging machine as defined in claim 1, wherein: The third cylinder (1) and the fourth cylinder (11) are arranged on the rack, a piston rod of the third cylinder (1) is connected with the first lifting frame (2), and a piston rod of the fourth cylinder (11) is connected with the third moving seat (12).
6. A bag opening mechanism for a bagging machine as defined in claim 1, wherein: The first, second, third and fourth bag expanding plates (4, 7, 5 and 6) are arranged in an arc shape.