Bag barrel forming mechanism

Abstract

The utility model discloses a bag barrel forming mechanism which comprises a machine frame, inflection forming mechanisms which can be close to each other or away from each other at the same time are symmetrically installed on the machine frame, each inflection forming mechanism is provided with a paper supporting mechanism, a corner pressing wheel set, a guide rod, a flattening wheel set and a smoothing mechanism from front to back, and a bent paper supporting rod is installed on each paper supporting mechanism. The paper supporting rods on the two sides form a C-shaped structure, a liftable bottom plate used for bearing paper is installed on the portion, located below the inflection forming mechanism, of the rack, the paper supporting rods can stably support the paper before the paper enters the corner pressing wheel set in a wrapping mode, transverse deviation of the paper is effectively limited, and the forming quality and the qualification rate of bag barrels are improved. A multi-step shaping mode of indentation shaping through a corner pressing wheel set, flattening shaping through a flattening wheel and overall flattening through a flattening mechanism is adopted, and paper can be gradually strengthened and shaped; the lifting bottom plate can flexibly adjust the bearing height according to the thickness, the material and the like of paper, the stable bearing effect is guaranteed, and the universality of the mechanism is enhanced.

Description

Technical Field

[0001] This utility model relates to a production line for packaging bags such as cement bags and chemical bags, and in particular to a bag tube forming mechanism. Background Technology

[0002] In the field of bag forming, the forming accuracy of paper directly affects the quality of the final product. In the existing technology, the support and guidance effect of the bag forming mechanism on the paper is not good. Especially during the high-speed paper conveying process, lateral deviation is prone to occur. This will cause the paper to be inaccurate when it enters the pressure roller group, resulting in defects such as crease deviation and bag forming skew, which seriously affects the product qualification rate.

[0003] Meanwhile, the shaping process of traditional mechanisms is relatively simple, often completed by a single pressing. For thicker or special paper, it is difficult to guarantee the stability of creases and the flatness of the bag tube, requiring additional finishing processes, which increases production time and costs. In addition, the height of the supporting components of existing mechanisms is mostly fixed and cannot be flexibly adjusted according to parameters such as paper thickness and material, resulting in poor adaptability. When changing to different paper sizes, a lot of time is required for equipment debugging, which reduces production efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a bag forming mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A bag forming mechanism includes a frame. Symmetrically mounted on the middle of the frame are folding forming mechanisms that can move closer to or further away from each other. Each folding forming mechanism has a paper-supporting mechanism, a pressure wheel set, a guide rod for folding the paper back, a flattening wheel set, and a smoothing mechanism mounted from front to back. The paper-supporting mechanism has a curved paper-supporting rod, and the paper-supporting rods on both sides form a C-shaped structure. A liftable base plate for supporting the paper is mounted on the frame below the folding forming mechanism.

[0007] The pressure roller assembly includes a vertical mounting column, on which a first mounting base is mounted. A rotatable and adjustable connecting rod is mounted on the side wall of the first mounting base, and a pressure roller is mounted on the end of the connecting rod.

[0008] The mounting post is located above the first mounting base and a second mounting base is mounted thereon, and the guide rod is mounted on the second mounting base.

[0009] The guide rod gradually tilts downwards from front to back.

[0010] The flattening wheel assembly includes a vertical rod, a horizontal rod that can be adjusted up and down, an inclined rod that can be adjusted left and right and can be rotated, and a flattening wheel is installed at the end of the inclined rod.

[0011] The tilting rod gradually tilts downwards from front to back.

[0012] The smoothing mechanism includes a second bracket, on which swing rods that can swing up and down are symmetrically mounted. A smoothing plate is mounted at the end of the swing rod, and the front end of the smoothing plate is provided with an upwardly folding guide.

[0013] A crossbeam is mounted on the frame, and several through holes are provided on the top of the crossbeam. A guide post is provided on the bottom of the base plate corresponding to the through holes. The guide post passes through the through holes. A rotating shaft is mounted on the frame below the crossbeam and rotated by a first hand crank. A cam structure is provided on the rotating shaft corresponding to the guide post, and the guide post abuts against the cam structure.

[0014] The beneficial effects of this utility model are as follows: This utility model has symmetrically installed folding and forming mechanisms in the middle of the frame, which can move closer or further apart simultaneously. From front to back, each folding and forming mechanism includes a paper-supporting mechanism, a pressure roller assembly, a guide rod for folding the paper back, a flattening roller assembly, and a smoothing mechanism. The paper-supporting mechanism has curved paper-supporting rods, with the two side paper-supporting rods forming a C-shaped structure. Below the folding and forming mechanism on the frame is a liftable base plate for supporting the paper. The paper-supporting rods provide stable wrapping support for the paper before it enters the pressure roller assembly, effectively limiting lateral deviation of the paper and improving the forming quality and pass rate of the bag tube. The multi-step forming method of "pressure roller indentation and shaping, flattening roller flattening and shaping, and overall smoothing by the smoothing mechanism" allows for gradual strengthening and shaping of the paper. The liftable base plate can flexibly adjust the support height according to the paper thickness and material, ensuring stable support and enhancing the versatility of the mechanism. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the folding forming mechanism;

[0018] Figure 3 This is a structural diagram of the pressure wheel assembly and guide rod;

[0019] Figure 4 This is a structural diagram of the flattening wheel assembly;

[0020] Figure 5 This is a schematic diagram of the lifting structure of the base plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0023] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0024] Reference Figure 1-5 A bag forming mechanism includes a frame 1. A folding forming mechanism 2 is symmetrically installed at the middle position of the frame 1, and the width of the bag is controlled by the distance between the folding forming mechanisms 2. The folding forming mechanism 2 is equipped with a paper-supporting mechanism 3, a pressure wheel group 5, a guide rod 7 for folding the paper back, a flattening wheel group 8, and a smoothing mechanism 9 from front to back.

[0025] Furthermore, a rotating rod 29, which can be rotated by a second hand crank 28, is installed on the frame 1. The rotating rod 29 is provided with a positive thread portion 30 and a negative thread portion 31. The two folding forming mechanisms 2 are correspondingly installed on the positive thread portion 30 and the negative thread portion 31 through the thread structure. By rotating the rotating rod 29 by the second hand crank 28, the two folding forming mechanisms 2 can move closer or further away from each other at the same time by utilizing the characteristics of the positive and negative threads. The adjustment is convenient and the synchronization is good, ensuring the symmetry of the folding forming mechanisms 2 on both sides.

[0026] The paper-supporting mechanism 3 is equipped with curved paper-supporting rods 4. The paper-supporting rods 4 on both sides form a C-shaped structure, which can provide stable wrapping support for the paper before it enters the pressure roller group 5, effectively limiting the lateral deviation of the paper. This structure fits the paper's conveying path, ensuring that the paper always maintains an accurate position during high-speed conveying, reducing forming defects caused by deviation, and significantly improving the forming quality and pass rate of the bag tube.

[0027] The corner pressing wheel assembly 5 includes a vertical mounting column 10, on which a first mounting base 11 is mounted. A rotatable and adjustable connecting rod 12 is mounted on the side wall of the first mounting base 11, and a corner pressing wheel 13 is mounted at the end of the connecting rod 12. The mounting column 10 provides stable support for the overall structure, and the rotatable and adjustable connecting rod 12 allows the corner pressing wheel 13 to flexibly adjust its angle to adapt to the cornering requirements of different papers, taking into account both stability and adaptability.

[0028] The mounting post 10 is located above the first mounting base 11 and a second mounting base 14 is mounted thereon. The guide rod 7 is mounted on the second mounting base 14. The pressure roller 13 and the guide rod 7 are both mounted on the folding forming mechanism 2 through the mounting post 10, so as to achieve a compact layout of the pressure roller 13 and the guide rod 7, save space and ensure that their relative positions are fixed, thereby improving the accuracy of process coordination.

[0029] The guide rod 7 gradually tilts downwards from front to back, conforming to the paper conveying trajectory, guiding the paper to fold back naturally, reducing resistance, avoiding jamming and deviation, and ensuring accurate folding position.

[0030] The flattening roller assembly 8 includes a vertical rod 16, on which a horizontal rod 17 that can be adjusted up and down is installed. The horizontal rod 17 is equipped with an inclined rod 18 that can be adjusted left and right and can be rotated. A flattening roller 19 is installed at the end of the inclined rod 18. The multi-dimensional adjustment structure (up and down, left and right, rotation) allows the flattening roller 19 to be precisely adapted to papers of different thicknesses and widths, ensuring that the flattening force and angle are reasonable and enhancing the flattening and shaping effect.

[0031] The tilting rod 18 tilts gradually downwards from front to back, matching the folded shape of the paper, so that the flattening roller 19 applies pressure evenly and enhances the stability of flattening.

[0032] The smoothing mechanism 9 includes a second support 20, on which swing rods 21 that can swing up and down are symmetrically mounted. A smoothing plate 22 is mounted at the end of the swing rod 21. The front end of the smoothing plate 22 is provided with an upwardly folding guide part 23. The swing rod 21 can be swung to adapt to the paper thickness and adjust the height of the smoothing plate. The guide part 23 guides the paper to enter smoothly.

[0033] The multi-step shaping method, consisting of "corner pressing wheel group for creasing and shaping, flattening wheel for flattening and shaping, and smoothing mechanism for overall smoothing," can gradually strengthen and shape the paper. The corner pressing wheel group forms a precise crease at the lower end of the C-shaped paper. After the guide rod completes the end folding, the flattening wheel further consolidates the stability of the folding. Finally, the smoothing mechanism achieves overall flatness of the bag tube, resulting in clear creases and a stable structure. No additional trimming process is required, thus reducing production costs.

[0034] The frame 1 is equipped with a height-adjustable base plate 6 for supporting paper, located below the folding and forming mechanism 2. The support height can be flexibly adjusted according to the thickness, material and other parameters of different papers, ensuring a stable support effect when processing various sizes of paper. This feature greatly improves the versatility of the mechanism, reduces the debugging time when changing paper, and improves production efficiency.

[0035] A crossbeam 24 is mounted on the frame 1. Several through holes are provided on the top of the crossbeam 24. A guide post 25 is provided on the bottom of the base plate 6 corresponding to the through holes. The guide post 25 passes through the through holes. A rotating shaft 27, which is rotated by a first hand crank 26, is mounted on the lower side of the frame 1 below the crossbeam 24. The rotating shaft 27 is provided with a cam structure corresponding to the guide post 25 (in addition, the cam structure can be replaced by a notch structure 32). The guide post 25 abuts against the cam structure. The guide post 25 cooperates with the through holes to ensure that the base plate 6 rises and falls smoothly. By rotating the first hand crank 26, the guide post 25 abuts against the cam structure at different positions, thereby achieving the purpose of raising and lowering the base plate 6. The overall design is simple and reliable and can quickly respond to the support needs of different papers.

[0036] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bag forming mechanism, comprising a frame (1), characterized in that... The frame (1) is symmetrically equipped with folding and forming mechanisms (2) that can move closer to or further away from each other at the same time. The folding and forming mechanism (2) is equipped with a paper-supporting mechanism (3), a pressure wheel group (5), a guide rod (7) for folding the paper back, a flattening wheel group (8), and a smoothing mechanism (9) from front to back. The paper-supporting mechanism (3) is equipped with a curved paper-supporting rod (4), and the paper-supporting rods (4) on both sides form a C-shaped structure. The frame (1) is equipped with a liftable base plate (6) for supporting the paper located below the folding and forming mechanism (2).

2. The bag forming mechanism according to claim 1, characterized in that... The pressure wheel assembly (5) includes a vertical mounting post (10), on which a first mounting seat (11) is mounted. A rotatable and adjustable connecting rod (12) is mounted on the side wall of the first mounting seat (11), and a pressure wheel (13) is mounted at the end of the connecting rod (12).

3. The bag forming mechanism according to claim 2, characterized in that... The mounting post (10) is located above the first mounting base (11) and a second mounting base (14) is mounted thereon. The guide rod (7) is mounted on the second mounting base (14).

4. The bag forming mechanism according to claim 1, characterized in that... The guide rod (7) gradually tilts downwards from front to back.

5. The bag forming mechanism according to claim 1, characterized in that... The flattening wheel assembly (8) includes a vertical rod (16), the vertical rod (16) is equipped with a horizontal rod (17) that can be adjusted up and down, the horizontal rod (17) is equipped with an inclined rod (18) that can be adjusted left and right and can be rotated, and the end of the inclined rod (18) is equipped with a flattening wheel (19).

6. The bag forming mechanism according to claim 5, characterized in that... The tilting rod (18) tilts downwards gradually from front to back.

7. The bag forming mechanism according to claim 1, characterized in that... The smoothing mechanism (9) includes a second bracket (20), on which swing rods (21) that can swing up and down are symmetrically installed. A smoothing plate (22) is installed at the end of the swing rod (21), and the front end of the smoothing plate (22) is provided with an upward folding guide (23).

8. The bag forming mechanism according to claim 1, characterized in that... A crossbeam (24) is installed on the frame (1). Several through holes are provided on the top of the crossbeam (24). A guide post (25) is provided on the bottom of the base plate (6) corresponding to the through holes. The guide post (25) passes through the through holes. A rotating shaft (27) is installed on the lower side of the frame (1) below the crossbeam (24). It is rotated by a first hand crank (26). A cam structure is provided on the rotating shaft (27) corresponding to the guide post (25). The guide post (25) abuts against the cam structure.

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