Bag mouth shaping device

Abstract

The utility model provides a bag mouth shaping device. The bag mouth shaping device comprises a pin assembly, a first shaping assembly, a second shaping assembly, a first mounting plate and a first lifting driving part, the first abutting piece and the second abutting piece of the pin assembly abut against the two opposite sides of the sealing part of the packaging bag so that the two opposite sides of the sealing part can be sunken inwards. The first shaping assembly is provided with an upper pressing plate and a lower pressing plate, and the upper pressing plate and the lower pressing plate are suitable for clamping the sealing part; an upper pushing plate and a lower pushing plate of the second shaping assembly are connected with an upper pressing plate and a lower pressing plate in a one-to-one correspondence mode, when the sealing part is clamped by the upper pressing plate and the lower pressing plate, the upper pushing plate and the lower pushing plate can be synchronously driven to be close to the sealing part, and the upper pushing plate and the lower pushing plate push the sealing part in the direction of the packaging part to flatten the sealing part; and the first lifting driving piece is suitable for driving the first mounting plate to descend, so that the sealing part is folded from the flattened position. The bag opening shaping device is compact in structure, small in occupied space and good in shaping effect.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a bag opening shaping device. Background Art

[0002] With the advancement of technology, more and more packaging is completed by automated equipment. During the packaging process of the automated packaging equipment, the mouth of the packaging bag of the finished product needs to be folded and glued.

[0003] In the related art, an automated device is used to perform operations such as shaping, folding and gluing on the mouth of a packaging bag. For example, Chinese utility model patent CN216332959U discloses a capping machine and a tensioning and packaging mechanism thereof, which perform operations such as shaping, folding and gluing on the packaging bag through a tensioning and packaging mechanism. However, the moving parts of the tensioning and packaging mechanism are independently arranged, the structural integration is poor, and a large space is occupied. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the above technology at least to a certain extent. To this end, the purpose of the utility model is to provide a bag opening shaping device, which has a compact structure, occupies a small space, and has a good shaping effect.

[0005] To achieve the above-mentioned purpose, the utility model proposes a bag opening shaping device, which comprises: a pin assembly, a first shaping assembly, a second shaping assembly, a first mounting plate and a first lifting drive member;

[0006] The pin assembly comprises a first abutment member and a second abutment member, wherein the first abutment member and the second abutment member can be close to and abut against two opposite sides of the sealing portion of the packaging bag, so that the two opposite sides of the sealing portion are recessed inwardly;

[0007] The first shaping component is disposed on the first mounting plate, and the first shaping component comprises an upper pressing plate and a lower pressing plate, and the upper pressing plate and the lower pressing plate can be opened and closed to clamp the sealing portion;

[0008] The second shaping assembly comprises an upper push plate and a lower push plate, wherein the upper push plate and the lower push plate are connected to the upper pressing plate and the lower pressing plate in a one-to-one correspondence, and both the upper push plate and the lower push plate can move toward the packaging portion of the packaging bag, and when the upper pressing plate and the lower pressing plate clamp the sealing portion, the upper push plate and the lower push plate can be synchronously driven to approach the sealing portion, and the upper push plate and the lower push plate are pushed in the direction of the packaging portion to flatten the sealing portion;

[0009] The first lifting driving member is connected to the first mounting plate to drive the first mounting plate to descend, so that the sealing portion is folded from the flattened portion between the sealing portion and the packaging portion.

[0010] According to a bag mouth shaping device of an embodiment of the utility model, the two opposite sides of the sealing part of the packaging bag are recessed inward by the pin assembly, so that the width of the sealing part becomes smaller; the sealing part is clamped and fixed by the first shaping assembly; the clamped and fixed sealing part is pushed toward the position adjacent to the packaging part by the second shaping assembly to flatten the sealing part, so that the entire section of the sealing part is flattened, and the first shaping assembly and the second shaping assembly integrated on the first mounting plate are driven to descend synchronously by the first lifting drive member, so that the sealing part is folded and shaped. The bag mouth shaping device has a compact structure, occupies a small space, and has a good shaping effect.

[0011] In addition, the bag opening shaping device according to the above embodiment of the utility model may also have the following additional technical features:

[0012] Optionally, the push-down plate is arranged to be inclined toward the sealing portion.

[0013] Optionally, the pin assembly includes an opening and closing driving member, and the opening and closing driving member connects the first abutting member and the second abutting member to drive the first abutting member and the second abutting member to move closer to or away from the sealing portion.

[0014] Optionally, the pin assembly further includes two blowing members, which are connected to the opening and closing driving member to be close to two opposite sides of the sealing portion and blow air toward a recessed portion of the sealing portion.

[0015] Optionally, the first shaping component includes a second lifting drive member and a third lifting drive member, the second lifting drive member and the third lifting drive member are both arranged on the first mounting plate, the second lifting drive member is connected to the upper pressure plate, and the third lifting drive member is connected to the lower pressure plate.

[0016] Optionally, the second shaping component includes a first movable driving member and a second movable driving member, the first movable driving member is arranged on the upper end surface of the upper pressure plate, and the second movable driving member is arranged on the lower end surface of the lower pressure plate through a connecting plate, the upper push plate is connected to the output end of the first movable driving member, and the lower push plate is connected to the output end of the second movable driving member.

[0017] Further, the connecting plate has a rib, and the rib is suitable for limiting the sealing portion between the upper pressing plate and the lower pressing plate when the upper pressing plate and the lower pressing plate clamp the sealing portion.

[0018] Optionally, a second mounting plate is further included, the first lifting drive member is arranged on the second mounting plate, the first mounting plate can be lifted and lowered on the second mounting plate, and the first mounting plate is connected to the output end of the first lifting drive member.

[0019] Optionally, grooves are provided at the locations where the upper pressing plate, the lower pressing plate and the sealing portion are clamped.

[0020] Optionally, a limiting member is further included, wherein the limiting member is arranged on the second mounting plate, and the limiting member is suitable for abutting against the first mounting plate when the first mounting plate descends to limit the lowest position of the first mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a shaping process of a bag mouth shaping device according to an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a bag opening shaping device according to an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the bag opening shaping device according to another perspective of an embodiment of the utility model;

[0024] Figure 4 It is a partial structural schematic diagram of the bag opening shaping device according to an embodiment of the utility model;

[0025] Figure 5 It is a partial structural schematic diagram of a pin assembly according to an embodiment of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the bag mouth shaping device, the gluing mechanism and the secondary shaping mechanism according to an embodiment of the utility model;

[0027] Description of reference numerals:

[0028] Pin assembly 1, first abutment member 11, second abutment member 12, blowing member 13, opening and closing drive member 14, first shaping assembly 2, upper pressure plate 21, lower pressure plate 22, second lifting drive member 23, third lifting drive member 24, groove 25, second shaping assembly 3, upper push plate 31, lower push plate 32, first movable drive member 33, second movable drive member 34, first mounting plate 4, first lifting drive member 5, packaging bag 6, sealing part 61, packaging part 62, connecting plate 7, rib 71, second mounting plate 8, limit member 9, secondary shaping mechanism 10, abutment pressure plate 101, rotating pressure plate 102, glue coating mechanism 20. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference below Figure 1-6 , the implementation of the bag mouth shaping device proposed in the embodiment of the utility model is described in detail, wherein, Figure 1 AD is a schematic diagram of the bag opening shaping step of the packaging bag 6.

[0033] The bag opening shaping device according to the embodiment of the utility model comprises: a pin assembly 1, a first shaping assembly 2, a second shaping assembly 3, a first mounting plate 4 and a first lifting drive member 5.

[0034] Specifically, the pin assembly 1 has a first abutment member 11 and a second abutment member 12, which can approach and abut the two opposite sides of the sealing portion 61 of the packaging bag 6, so that the two opposite sides of the sealing portion 61 are recessed inward; the first shaping assembly 2 is arranged on the first mounting plate 4, and the first shaping assembly 2 has an upper pressing plate 21 and a lower pressing plate 22, which can be opened and closed to clamp the sealing portion 61; the second shaping assembly 3 has an upper push plate 31 and a lower push plate 32, and the upper push plate 31 and the lower push plate 32 The upper pressure plate 21 and the lower pressure plate 22 are connected one by one, and the upper push plate 31 and the lower push plate 32 can both move toward the packaging part 62 of the packaging bag 6. When the upper pressure plate 21 and the lower pressure plate 22 clamp the sealing part 61, the upper push plate 31 and the lower push plate 32 can be synchronously driven to approach the sealing part 61, and the upper push plate 31 and the lower push plate 32 are pushed along the direction of the packaging part 62 to flatten the sealing part 61; the first lifting drive member 5 is connected to the first mounting plate 4 to drive the first mounting plate 4 to descend, so that the sealing part 61 is folded from the flattened position between the sealing part 61 and the packaging part 62.

[0035] That is, after the product is loaded into the packaging bag 6 in the previous process, the packaging bag 6 forms a sealing portion 61 and a packaging portion 62, and the first abutting member 11 and the second abutting member 12 of the pin assembly 1 approach and abut the sealing portion 61 from two opposite sides of the sealing portion 61, so that the two opposite sides of the sealing portion 61 are concave inward, thereby reducing the width of the sealing portion 61, and the upper pressing plate 21 and the lower pressing plate 22 of the first shaping assembly 2 clamp the sealing portion 61, so that the clamped concave part is clamped flat and formed, and at the same time, the second shaping assembly The upper push plate 31 and the lower push plate 32 of 3 follow the clamping of the upper pressure plate 21 and the lower pressure plate 22 and synchronously approach and abut the sealing portion 61, and the upper push plate 31 and the lower push plate 32 are pushed toward the packaging portion 62, so that the sealing portion 61 between the clamped position and the packaging portion 62 is pushed and flattened, and the first lifting drive member 5 drives the first mounting plate 4 to descend, so that the first shaping component 2 and the second shaping component 3 are synchronously descended, so that the sealing portion 61 is pulled down and folded into shape along the position between the sealing portion 61 and the packaging portion 62.

[0036] Thus, the two opposite sides of the sealing portion 61 of the packaging bag 6 are recessed inwards by the pin assembly 1, so that the width of the sealing portion 61 becomes smaller; the sealing portion 61 is clamped and fixed by the first shaping assembly 2; the clamped and fixed sealing portion 61 is pushed toward the position adjacent to the packaging portion 62 by the second shaping assembly 3 to flatten the sealing portion 61, so that the entire sealing portion 61 is flattened, and the first shaping assembly 2 and the second shaping assembly 3 integrated on the first mounting plate 4 are driven to descend synchronously by the first lifting drive 5, so that the sealing portion 61 is folded and shaped. The bag mouth shaping device has a compact structure, occupies a small space, and has a good shaping effect.

[0037] As for the lower push plate 32, the lower push plate 32 is arranged obliquely toward the sealing portion 61. It can be understood that, by the inclined arrangement of the lower push plate 32, it is convenient for the lower push plate 32 to gradually guide the sealing portion 61 to be flattened along the concave portions on both sides of the sealing portion 61 when pushing toward the packaging portion 62, so that the sealing portion 61 can be flattened and formed more fully.

[0038] For the movement of the first abutting member 11 and the second abutting member 12, the pin assembly 1 includes an opening and closing driving member 14, which connects the first abutting member 11 and the second abutting member 12 to drive the first abutting member 11 and the second abutting member 12 to move closer to or away from the sealing portion 61. It can be understood that the opening and closing driving member 14 can drive the first abutting member 11 and the second abutting member 12 to open and close, so that the first abutting member 11 and the second abutting member 12 can switch between the position of avoiding the sealing portion 61 and the position of abutting the sealing portion 61, thereby facilitating the two opposite sides of the sealing portion 61 to be squeezed into a concave shape, so that the sealing portion 61 forms a smaller width fold.

[0039] For maintaining the concave portion of the sealing portion 61, the pin assembly 1 further includes two blowing members 13, which are connected to the opening and closing driving member 14 to be close to the two opposite sides of the sealing portion 61 and blow air toward the concave portion of the sealing portion 61. It can be understood that the arrangement of the blowing members 13 can facilitate blowing air into the concave portion after the two opposite sides of the sealing portion 61 are concave inwardly, so that the sealing portion 61 remains in a concave state, which is convenient for the subsequent flattening and shaping of the sealing portion 61. Among them, a throttle valve can be arranged on the blowing member 13 to facilitate adjusting the blowing volume.

[0040] For driving the upper pressing plate 21 and the lower pressing plate 22, the first shaping assembly 2 includes a second lifting driving member 23 and a third lifting driving member 24, both of which are arranged on the first mounting plate 4, the second lifting driving member 23 is connected to the upper pressing plate 21, and the third lifting driving member 24 is connected to the lower pressing plate 22. It can be understood that the upper pressing plate 21 and the lower pressing plate 22 are driven one by one by the second lifting driving member 23 and the third lifting driving member 24, so that the upper pressing plate 21 and the lower pressing plate 22 can clamp the sealing part 61, thereby clamping and flattening the end of the sealing part 61 close to the bag opening of the packaging bag 6, so as to facilitate the subsequent shaping of the unshaped part of the sealing part 61 by the second shaping assembly 3. Among them, the second lifting driving member 23 and the third lifting driving member 24 can be cylinders.

[0041] As for the second shaping component 3, the second shaping component 3 includes a first movable driving member 33 and a second movable driving member 34. The first movable driving member 33 is arranged on the upper end surface of the upper pressing plate 21, and the second movable driving member 34 is arranged on the lower end surface of the lower pressing plate 22 through the connecting plate 7. The upper push plate 31 is connected to the output end of the first movable driving member 33, and the lower push plate 32 is connected to the output end of the second movable driving member 34. It can be understood that the upper push plate 31 and the lower push plate 32 are driven one by one by the first movable driving member 33 and the second movable driving member 34, so that the upper push plate 31 and the lower push plate 32 push and flatten the unshaped part of the sealing part 61. The first movable driving member 33 is arranged on the upper end surface of the upper pressing plate 21, and the second movable driving member 34 is arranged on the lower end surface of the lower pressing plate 22 through the connecting plate 7, so that the upper pressing plate 21 and the lower pressing plate 22 can synchronously drive the upper push plate 31 and the lower push plate 22 connected to the first movable driving member 33. The lower push plate 32 connected to the second movable driving member 34 opens and closes synchronously, so that the upper push plate 31 and the lower push plate 32 are close to the sealing part 61 to push the sealing part 61 to flatten and shape it. As a result, the coordination between the moving parts is more compact, which facilitates reducing the space occupied by the equipment. The first movable driving member 33 and the second movable driving member 34 can be cylinders, the upper push plate 31 and the lower push plate 32 can be set to be L-shaped, and the upper push plate 31 and the lower push plate 32 can be set to be arc-shaped at the joint with the sealing part 61.

[0042] For limiting the sealing portion 61, the connecting plate 7 has a rib 71, and the rib 71 is suitable for limiting the sealing portion 61 between the upper pressing plate 21 and the lower pressing plate 22 when the upper pressing plate 21 and the lower pressing plate 22 clamp the sealing portion 61. It can be understood that by setting the rib 71, it is convenient to limit the sealing portion 61 between the upper pressing plate 21 and the lower pressing plate 22, thereby ensuring the reliability of the shaping of the sealing portion 61. Among them, the rib 71 can be integrally bent and formed, and a connecting hole is provided on the rib 71 to connect with the lower pressing plate 22 by screws, and the second movable driving member 34 can be connected through a connecting groove on the connecting plate 7.

[0043] For the installation of the first mounting plate 4 and the first lifting drive member 5, a second mounting plate 8 is also included, the first lifting drive member 5 is arranged on the second mounting plate 8, the first mounting plate 4 can be lifted and lowered on the second mounting plate 8, and the first mounting plate 4 is connected to the output end of the first lifting drive member 5. It can be understood that the second mounting plate 8 is arranged to facilitate the installation of the first lifting drive member 5 and the first mounting plate 4, so that the first lifting drive member 5 drives the first mounting plate 4 to move upward and downward, so as to facilitate the downward pulling and folding of the sealing portion 61. Among them, the first lifting drive member 5 can be a cylinder, and the first mounting plate 4 can be installed on the second mounting plate 8 through a moving pair.

[0044] For the upper pressing plate 21 and the lower pressing plate 22, the upper pressing plate 21 and the lower pressing plate 22 are both provided with grooves 25 at the clamping positions with the sealing portion 61. It can be understood that by setting the grooves 25 of the upper pressing plate 21 and the lower pressing plate 22, it is convenient to increase the friction force of the upper pressing plate 21 and the lower pressing plate 22 clamping the sealing portion 61, thereby ensuring the stability of the clamping of the sealing portion 61, so as to facilitate the subsequent upper push plate 31 and the lower push plate 32 to push and flatten the sealing portion 61. Among them, the number of grooves 25 of the upper pressing plate 21 and the lower pressing plate 22 can be two each.

[0045] The first mounting plate 4 is limited in position, and further includes a limiter 9, which is disposed on the second mounting plate 8. The limiter 9 is adapted to abut against the first mounting plate 4 when the first mounting plate 4 is lowered to limit the lowest position of the first mounting plate 4. It can be understood that the limiter 9 limits the lowest position of the first mounting plate 4, so that the position of the sealing portion 61 being pulled down and folded is relatively fixed, thereby facilitating subsequent secondary folding, gluing, and other operations on the sealing portion 61. The limiter 9 may be a hydraulic buffer.

[0046] In addition, after the sealing part 61 is pulled down and folded, the sealing part 61 can be folded for a second time by the abutment pressure plate 101 of the secondary shaping mechanism 10, and then the packaging part 62 is glued by the gluing mechanism 20, and then the sealing part 61 is folded to the glued position by the rotating pressure plate 102 of the secondary shaping mechanism 10.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A bag opening shaping device, characterized in that: include: A pin assembly, a first shaping assembly, a second shaping assembly, a first mounting plate and a first lifting drive member; The pin assembly comprises a first abutment member and a second abutment member, wherein the first abutment member and the second abutment member can be close to and abut against two opposite sides of the sealing portion of the packaging bag, so that the two opposite sides of the sealing portion are recessed inwardly; The first shaping component is disposed on the first mounting plate, and the first shaping component comprises an upper pressing plate and a lower pressing plate, and the upper pressing plate and the lower pressing plate can be opened and closed to clamp the sealing portion; The second shaping assembly comprises an upper push plate and a lower push plate, wherein the upper push plate and the lower push plate are connected to the upper pressing plate and the lower pressing plate in a one-to-one correspondence, and both the upper push plate and the lower push plate can move toward the packaging portion of the packaging bag, and when the upper pressing plate and the lower pressing plate clamp the sealing portion, the upper push plate and the lower push plate can be synchronously driven to approach and abut against the sealing portion, and the upper push plate and the lower push plate are pushed in the direction of the packaging portion to flatten the sealing portion; The first lifting driving member is connected to the first mounting plate to drive the first mounting plate to descend, so that the sealing portion is folded from the flattened portion between the sealing portion and the packaging portion.

2. The bag opening shaping device according to claim 1, characterized in that: The push-down plate is arranged obliquely toward the sealing portion.

3. The bag opening shaping device according to claim 1, characterized in that: The pin assembly includes an opening and closing driving member, and the opening and closing driving member connects the first abutting member and the second abutting member to drive the first abutting member and the second abutting member to move closer to or away from the sealing portion.

4. The bag opening shaping device according to claim 3, characterized in that: The pin assembly further comprises two blowing members, which are connected to the opening and closing driving member to be close to two opposite sides of the sealing portion and blow air toward the concave portion of the sealing portion.

5. The bag opening shaping device according to claim 1, characterized in that: The first shaping component includes a second lifting drive member and a third lifting drive member, the second lifting drive member and the third lifting drive member are both arranged on the first mounting plate, the second lifting drive member is connected to the upper pressing plate, and the third lifting drive member is connected to the lower pressing plate.

6. The bag opening shaping device according to claim 1, characterized in that: The second shaping component includes a first movable driving member and a second movable driving member. The first movable driving member is arranged on the upper end surface of the upper pressure plate, and the second movable driving member is arranged on the lower end surface of the lower pressure plate through a connecting plate. The upper push plate is connected to the output end of the first movable driving member, and the lower push plate is connected to the output end of the second movable driving member.

7. The bag opening shaping device according to claim 6, characterized in that: The connecting plate has a rib, and the rib is suitable for limiting the sealing portion between the upper pressing plate and the lower pressing plate when the upper pressing plate and the lower pressing plate clamp the sealing portion.

8. The bag opening shaping device according to claim 1, characterized in that: It also includes a second mounting plate, the first lifting drive member is arranged on the second mounting plate, the first mounting plate can be lifted and lowered on the second mounting plate, and the first mounting plate is connected to the output end of the first lifting drive member.

9. The bag opening shaping device according to claim 1, characterized in that: The upper pressing plate, the lower pressing plate and the sealing portion are all provided with grooves at the locations where they are clamped.

10. The bag opening shaping device according to claim 8, characterized in that: It also includes a limiting member, which is arranged on the second mounting plate and is suitable for abutting against the first mounting plate when the first mounting plate descends to limit the lowest position of the first mounting plate.

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