Edge folding and angle pressing device of paper bag machine

Abstract

The utility model discloses an edge folding and corner pressing device of a paper bag machine, which comprises a material bearing platform, a bag body fixing mechanism, an edge folding mechanism and a corner folding mechanism, the bag body fixing mechanism is arranged above the material bearing platform, the edge folding mechanism is arranged on the outer side of the bag body fixing mechanism, and the corner folding mechanism is arranged on the side of the edge folding mechanism; the bag body fixing mechanism comprises a bag pressing plate for positioning a material main body and a lifting driving unit; the edge folding mechanism comprises an edge folding pressing plate and an edge folding driving unit; the angle folding mechanism comprises an angle folding pressing plate and an angle folding driving unit; the angle pressing plate comprises an angle pressing plane, and the angle pressing driving unit drives the angle pressing plane to move along a curved track, so that the angle pressing plane partially crosses a crease line of the material and then inwards presses a folding part of the material. The bag pressing plate presses downwards to fix a material bag body, the edge folding driving unit controls the edge folding pressing plate to complete the edge folding action of a bag opening, the corner pressing plane of the corner folding pressing plate moves along a curved track to press the folding part inwards to complete automatic edge folding and corner folding, and edge folding and corner folding mechanisms work cooperatively.

Description

Technical Field

[0001] The utility model relates to the field of paper bag machines, in particular to a folding and corner pressing device of a paper bag machine. Background Art

[0002] Paper packaging bags are widely used in the field of luxury goods packaging (such as electronic products, jewelry, shoes, clothing, bags, etc.) due to their environmentally friendly characteristics and high-end texture. Among them, square-bottom paper bags have become the mainstream products in the market due to their large capacity and three-dimensional load-bearing performance. This type of paper bag is usually formed into a rectangular structure by symmetrically folding the left and right side pieces and gluing the bottom. However, the bottom folding process will produce waistline creases running through the side, which seriously affects the aesthetics of the product.

[0003] In order to solve the problem of waistline exposure, the prior art proposes a variety of improvement schemes. For example, the Chinese invention patent CN116902368B discloses a "double-sided center-sealed paper bag with overlapping top and manufacturing process", which forms an oblique opening through the first side surface and the second side surface close to the bottom surface. The two oblique openings form a "V"-shaped groove at the bottom of the side surface, so that the bottom of the paper bag can be folded in half to avoid the waistline on the side bag surface, thereby improving the aesthetic performance of the paper bag. After folding, the side edges are overlapped and wrapped to achieve seamless connection. However, this structure has significant defects: the extension section needs to be accurately inserted into the narrow gap during the overlapping process. It is difficult for existing automated equipment to complete this action, and it must rely on manual operation, resulting in low production efficiency.

[0004] In order to further optimize the overlapping process, the applicant previously proposed a "waistline-free paper container that facilitates overlapping of the upper inner folded side panels", which is convenient for subsequent overlapping by setting a folding part on the short inner folding sheet (the second side surface). The folding part is set on the short inner folding sheet to expand the plug-in guide space. Although this design reduces the difficulty of manual operation, the existing technology still lacks a mechanical structure that can simultaneously realize the folding and corner folding functions, resulting in the need to rely on skilled workers for manual operation, which not only makes it difficult to ensure product consistency, but also seriously restricts the increase in production capacity. Summary of the invention

[0005] The utility model aims at the shortcomings of the prior art and provides a mechanical structure which can realize edge folding and corner folding at the same time, so as to facilitate the subsequent overlapping and a kind of edge folding and corner pressing device of a paper bag machine.

[0006] To solve the above technical problems, the utility model is solved by the following technical solutions: a folding and corner pressing device of a paper bag machine, comprising a material receiving platform, a bag body fixing mechanism, a folding mechanism and a corner folding mechanism, wherein the bag body fixing mechanism is arranged above the material receiving platform, the folding mechanism is arranged on the outside of the bag body fixing mechanism, and the corner folding mechanism is arranged on the side of the folding mechanism; the bag body fixing mechanism comprises a bag pressing plate and a lifting drive unit, the bag pressing plate is transmission-connected with the lifting drive unit, and the bag pressing plate is used to position the material body; the folding mechanism comprises a folding pressure plate and a folding drive unit, the folding drive unit is connected with the folding pressure plate, and the folding drive unit is used to drive the folding pressure plate to perform folding action; the corner folding mechanism comprises a folding pressure plate and a folding drive unit, the folding pressure plate is connected with the folding drive unit; the folding pressure plate comprises a corner pressing plane, and the corner folding drive unit drives the corner pressing plane to move along a curved trajectory, so that after the corner pressing plane part passes over the crease line of the material, the folded part of the material is pressed inward.

[0007] The bag fixing mechanism of the utility model drives the bag pressing plate to rise and fall to fix the material bag body through the lifting drive unit, thereby ensuring the stability of the material during the processing and the yield rate. The folding drive unit controls the folding pressing plate to complete the folding action of the bag mouth. The pressing plane of the folding pressing plate moves along a curved trajectory. After the pressing plane part passes the crease line, it presses the folding part inward to complete the automatic folding and corner folding. The folding pressing plate presses the folding part to the inner side of the bag body. The folding and corner folding mechanisms work together to replace manual work and improve production efficiency.

[0008] Preferably, the hemming drive unit comprises a moving bracket and a lifting seat, the moving bracket is in driving connection with a translation driving component that drives the moving bracket to move forward and backward, and the lifting seat can move up and down relative to the moving bracket. The lifting seat drives the hemming pressing plate to lift the hemming, the translation driving component drives the hemming pressing plate to move forward, and the lifting seat drives the hemming pressing plate to move downward to realize the hemming action.

[0009] Preferably, the folding drive unit includes a first lifting drive component and a swinging drive component, wherein the first lifting drive component drives the folding plate to move up and down relative to the material receiving platform, and the swinging drive component drives the folding plate to swing up and down relative to the material receiving platform to perform folding. The first lifting drive component drives the folding plate to move up to perform the lifting action, and the swinging drive component drives the folding plate to perform folding by swinging.

[0010] Preferably, the frame is further provided with an auxiliary folding plate, which is arranged above the material receiving platform, and is connected to the second lifting drive component by transmission, and the auxiliary folding plate is provided with a folding straight line. The second lifting drive component drives the auxiliary folding plate to move downward, and the auxiliary folding plate cooperates with the folding pressure plate to fold, thereby ensuring the folding success rate.

[0011] Furthermore, the auxiliary hemming plate is also connected to a front and rear driving component that drives it to move forward and backward; or the auxiliary hemming plate is also connected to a rotating driving component that drives it to rotate horizontally. The front and rear driving component or the rotating driving component drives the auxiliary hemming plate to avoid the hemming pressure plate.

[0012] Preferably, auxiliary angle pressing plates are respectively arranged on both sides of the folding pressing plate, the folding driving unit is in transmission connection with the auxiliary angle pressing plates, and the auxiliary angle pressing plates are provided with angle pressing bevels. The angle pressing bevels can ensure that the folding pressing plate folds the folded portion along the crease line to ensure the consistency of the folding position.

[0013] Preferably, the curved trajectory includes a zigzag motion trajectory, and the curved trajectory includes a horizontal propulsion section and a vertical downward pressure section.

[0014] Furthermore, the angle driving unit includes a fixed seat, an angle moving seat and a lifting rod, the fixed seat is provided with a translation guide rail, the angle moving seat is slidably set on the translation guide rail, the first driving component drives the angle moving seat to move horizontally along the translation guide rail to realize the horizontal propulsion section; the lifting rod is set on the angle moving seat, the lifting rod is connected to the angle pressure plate, and the second driving component drives the lifting rod to move up and down in the vertical direction to realize the vertical downward pressure section.

[0015] Furthermore, the translation guide rail is arranged along the front-to-back direction, or the translation guide rail is arranged along the left-to-right direction; or the vertical projection of the translation guide rail is perpendicular to the crease line of the material.

[0016] Preferably, the curved trajectory includes an arc motion trajectory, the folding angle driving unit includes a swing driving unit and a lifting seat, the lifting seat can move up and down, the folding angle pressing plate is hinged at the bottom of the lifting seat, the folding angle pressing plate is connected to the swing driving unit, and the swing driving unit drives the folding angle pressing plate to swing downward around the hinge point to realize the arc motion trajectory. The lifting seat drives the folding angle pressing plate to move downward and position before the material is fed, and the swing driving unit drives the folding angle pressing plate to swing downward to press the folding part inward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the arc track of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the folded line track of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the folding mechanism of the utility model.

[0020] Figure 4 It is a schematic diagram of the corner folding operation of the arc track of the utility model.

[0021] Figure 5 It is a schematic diagram of the material of the utility model.

[0022] Figure 6 It is an action schematic diagram of embodiment 1 of the utility model.

[0023] Figure 7 It is an action schematic diagram of embodiment 2 of the present utility model.

[0024] The parts indicated by the numbers in the above drawings are as follows:

[0025] Among them, 1. material receiving platform; 2. bag pressing plate; 31. folding pressure plate; 32. folding drive unit; 321. movable bracket; 322. folding lifting seat; 41. corner pressing plate; 42. corner driving unit; 421. corner moving seat; 422. translation guide rail; 423. swing drive unit; 424. corner lifting seat; 5. auxiliary corner pressing plate; 51. corner pressing bevel; 6. material; 61. folding part; 62. crease line; 63. bag body; 64. side dividing surface; 7. auxiliary folding plate. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. Figure 1 , the X-axis direction is the left-right direction, that is, the horizontal direction, the Y-axis direction is the front-back direction, that is, the longitudinal direction; the Z-axis direction is the up-down direction, that is, the vertical direction.

[0027] Example 1

[0028] A folding and corner pressing device for a paper bag machine comprises a material receiving platform 1, a bag body fixing mechanism, a folding mechanism and a corner folding mechanism. The frame is provided with a material receiving platform 1 for placing a material 6. Figure 5 As shown, the bag body fixing mechanism is arranged above the material receiving platform 1, the folding mechanism is arranged on the outside of the bag body fixing mechanism, and the folding mechanism is arranged on the side of the folding mechanism; the bag body fixing mechanism includes a bag pressing plate 2 and a lifting drive unit, the bag pressing surface of the bag pressing plate 2 acts on the bag body 6 of the material, the bag pressing plate 2 is connected to the lifting drive unit, the bag pressing plate 2 is used to position the material 6, and the lifting drive unit drives the bag pressing plate 2 to descend and fix the bag body 63 of the material to ensure that the material 6 is stable during the processing; the folding mechanism includes a folding plate 31 and a folding drive unit 32, the folding drive unit 32 is connected to the folding plate 31, and the folding drive unit 32 is used to drive the folding plate 31 to fold, and there are many folding methods for the folding plate 31, such as referring to Figure 3The hemming drive unit 32 includes a mobile bracket 321 and a hemming lifting seat 322. The mobile bracket 321 is connected to the translation drive component that drives it to move forward and backward. The hemming drive unit 32 can be a screw transmission mechanism or a cam mechanism. The hemming lifting seat 322 can move up and down relative to the mobile bracket 321. The mobile bracket 321 is provided with a lifting cylinder, and the output end of the lifting cylinder is connected to the bottom of the hemming lifting seat 322. When the hemming drive unit 32 is working, it drives the hemming pressing plate 31 to move up, lifts the side surface 64 of the material, and then drives the hemming pressing plate 31 to move forward and press down to achieve the hemming action of the material 6. The hemming pressing plate 31 is detachably arranged on the hemming lifting seat 322. There are many ways of detachable connection. In this embodiment, the hemming pressing plate 31 is threadedly connected to the hemming lifting seat 322. Alternatively, the folding drive unit 32 includes a first lifting drive component and a swinging drive component. The first lifting drive component can be a lifting bracket connected to a cylinder. The first lifting drive component drives the folding plate 31 to move up and down relative to the material receiving platform 1. The cylinder drives the lifting bracket to drive the folding plate 31 to move up and down relative to the material receiving platform 1. The swinging drive component drives the folding plate 31 to swing up and down relative to the material receiving platform 1 to perform a folding action. The folding plate 31 is hinged on the lifting bracket. The folding plate 31 can initially be perpendicular to the upper mounting surface of the lifting bracket. The swinging drive component drives the folding plate 31 to swing downward 90° to fold the side surface 64 of the material. When the folding drive unit 32 is working, it drives the folding plate 31 to move upward to lift the side surface 64 of the material. Then the swinging drive component drives the folding plate 31 to swing downward to achieve the folding action of the material.

[0029] The folding mechanism includes a folding plate 41 and a folding drive unit 42, wherein the folding plate 41 is connected to the folding drive unit 42, wherein the folding plate 41 includes a folding plane, wherein the folding drive unit 42 drives the folding plane to move along a curved track, so that after the folding plane partially passes over the crease line 62 of the material 6, the folding portion 61 of the material 6 is pressed inwardly, and the folding plane is a plane for pressing the folding portion, wherein the folding plane acts on the folding portion during the folding process to realize folding. In this embodiment, as Figure 2 and Figure 6As shown, the curved trajectory includes a broken-line motion trajectory, the curved trajectory includes a horizontal propulsion section and a vertical downward pressure section, the motion trajectory of the angled pressing plate 41 is inverted L-shaped, the angled driving unit 42 includes a fixed seat, an angled movable seat 421 and a lifting rod, the fixed seat is provided with a translation guide rail 422, the angled movable seat 421 is slidably arranged on the translation guide rail 422, the first driving component drives the angled movable seat 421 to move horizontally along the translation guide rail 422 to realize the horizontal propulsion section, the first driving component is a cylinder or a motor, the first driving component is fixedly arranged on the fixed seat, the output end of the first driving component is connected to the angled movable seat 421, the lifting rod is arranged on the angled movable seat 421, and the lifting rod is connected to the angled pressing plate 41, The second driving component drives the lifting rod to move up and down in the vertical direction to realize the vertical pressing section, the telescopic cylinder drives the lifting rod to drive the corner pressing plate 41 to move up and down, the first driving component and the second driving component drive the corner pressing plate 41 to move in a broken line shape, the horizontal propulsion section makes the folding part 61 pre-folded along the crease line 62, the vertical pressing section makes the folding part 61 press down the folding angle, wherein the translation guide rail 422 is arranged along the front and rear direction, that is, the horizontal propulsion section is parallel to the side of the material 6, or the translation guide rail 422 is arranged along the left and right direction, that is, the horizontal propulsion section is parallel to the bag mouth edge of the material 6, or the vertical projection of the translation guide rail 422 is perpendicular to the crease line 62 of the material 6, the moving path of the corner pressing plate 41 is perpendicular to the crease line 62 of the material 6, and this folding method has a better effect.

[0030] Working principle: material 6 is placed on the material receiving platform 1, and the lifting drive unit drives the bag pressing plate 2 to press down to position the bag body 63 of the material 6, and the folding drive unit 32 drives the folding pressure plate 31 to move up and forward (or swing downward) to fold the side surface 64 of the material 6. During the folding process of the bag mouth of the material 6, the folding portion 61 of the bag mouth is in contact with the folding pressure plate 41, and the folding pressure plate 41 blocks the folding portion 61 to achieve pre-folding of the folding portion 61. After the folding is completed, the folding pressure plate 31 returns to avoid, and then the folding drive unit 42 drives the folding pressure plate 41 to first advance horizontally to fold the folding portion 61 inward, and then drives the folding pressure plate 41 to press vertically downward to completely fold the folding portion 61 to form a folding angle. The folding pressure plate 31 and the folding pressure plate 41 cooperate to complete the folding and pressing angle, and then the bag pressing plate 2 and the folding pressure plate 41 return to their positions, and the material 6 can be subsequently sent to the next process through a suction belt or the like.

[0031] Example 2

[0032] The basic structure is the same as that of Embodiment 1, except that: Figure 1 and Figure 7As shown, the curved trajectory includes an arc motion trajectory, and the structure of the corner driving unit 42 is different. Specifically, the corner driving unit 42 includes a swing driving unit 423 and a corner lifting seat 424. The telescopic power source is fixedly arranged on the frame, and the output shaft of the telescopic power source is connected to the corner lifting seat 424. The corner lifting seat 424 can move up and down. The frame is provided with a vertical guide rail, and the corner lifting seat 424 is slidably arranged on the vertical guide rail. The corner pressing plate 41 is hinged at the bottom of the corner lifting seat 424, and the corner pressing plate 41 is connected to the bottom of the corner lifting seat 424 through a hinge. The corner pressing plate 41 is connected to the swing driving unit 423, and the swing driving unit 423 drives the corner pressing plate 41 to swing downward around the hinge point to realize the arc motion trajectory. The corner lifting seat 424 drives the corner pressing plate 41 to move downward, so that the flipping axis of the corner pressing plate 41 is arranged correspondingly to the folding line 62 of the folding part 61 on its outer side, and the swing driving unit 423 drives the corner pressing plate 41 to swing downward to fold the folding part 61. The structure is simple and the corner folding quality is guaranteed.

[0033] When the material size is large, its elasticity may cause local deformation. For this reason, the frame is also provided with an auxiliary folding plate 7 that cooperates with the folding plate to fold, the auxiliary folding plate 7 is arranged above the material receiving platform, the auxiliary folding plate 7 is arranged on the opposite side of the folding plate, the auxiliary folding plate 7 corresponds to the inner side of the material side facet, the folding plate is arranged correspondingly below the material side facet, the auxiliary folding plate 7 is connected to the second lifting drive component 8 by transmission, the auxiliary folding plate 7 is provided with a folding straight line, the folding straight line of the auxiliary folding plate 7 corresponds to the pre-folding line of the material side facet, when the folding plate performs the folding action, the auxiliary folding plate 7 cooperates with the folding plate to fold, and the pressure of the auxiliary folding plate 7 will locally increase the rigidity of the pre-folding line area, so that the stress during folding is more concentrated at the pre-folding line, ensuring that the material side facet is folded inward along the pre-folding line, and improving the folding success rate.

[0034] In order to avoid motion interference, the initial position of the auxiliary folding plate 7 is usually higher than the highest point of the motion trajectory of the folding plate, so the stroke of the auxiliary folding plate 7 is long, and the production efficiency cannot be further improved. To this end, the auxiliary folding plate 7 is also connected to the front and rear driving components that drive it to move forward and backward. The front and rear driving components drive the auxiliary folding plate 7 to move forward and backward, so that the auxiliary folding plate 7 retreats and gives way. In this embodiment, the front and rear driving components are cylinders, which are arranged on a connecting seat. The connecting seat is connected to the second lifting driving component 8, so that the auxiliary folding plate 7 can move forward and backward and up and down.

[0035] or reference Figure 1 and Figure 4, the auxiliary folding plate 7 is also connected to the rotating drive component that drives it to rotate horizontally. The rotating drive component can be a motor. The output end of the motor is connected to the auxiliary folding plate 7, so that the auxiliary folding plate 7 can rotate horizontally. The motor is set on the lifting connection seat of the second lifting drive component 8, so that the auxiliary folding plate 7 can rotate horizontally and move up and down. When the auxiliary folding plate 7 is working, the front and rear driving components or the rotating driving components drive the auxiliary folding plate 7 to be in place, the second lifting drive component 8 drives the auxiliary folding plate to be pressed down, and the folding plate is moved up again to realize the pre-folding of the side surface of the material along the pre-folding line, and then the front and rear driving components or the rotating driving components drive the auxiliary folding plate 7 to avoid, and the folding plate is pressed down again to complete the folding. The coordination between the second lifting drive component 8 and the rotating drive component or the front and rear driving components can drive the auxiliary folding plate 7 to quickly avoid after the operation is completed, shorten the travel redundancy, and thus improve production efficiency.

[0036] In order to further improve the folding quality, auxiliary folding plates 5 are respectively provided on both sides of the folding pressure plate 31, and the folding drive unit 32 is transmission connected to the auxiliary folding plate 5. The auxiliary folding plate 5 is arranged on both sides of the folding lifting seat 322, and the auxiliary folding plate 5 moves together with the folding pressure plate 31. The auxiliary folding plate 5 is provided with a folding bevel 51. Preferably, the folding bevel 51 is parallel to the crease line 62 of the material 6. When the folding part 61 of the material 6 is pre-pressed against the folding pressure plate 41, the auxiliary folding plate 5 can assist the folding part 61 in pre-folding to ensure that there is no deviation of the crease during the folding process.

[0037] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A folding and corner pressing device for a paper bag machine, comprising a material receiving platform (1), a bag body fixing mechanism and a folding mechanism, characterized in that: It also includes a folding mechanism, the bag body fixing mechanism is arranged above the material receiving platform (1), the edge folding mechanism is arranged outside the material receiving platform (1), and the folding mechanism is arranged on the side of the edge folding mechanism; The bag body fixing mechanism comprises a bag pressing plate (2) and a lifting drive unit, the bag pressing plate (2) being in driving connection with the lifting drive unit, and the bag pressing plate (2) being used for positioning materials; The folding mechanism comprises a folding pressing plate (31) and a folding driving unit (32), wherein the folding driving unit (32) is connected to the folding pressing plate (31), and the folding driving unit (32) is used to drive the folding pressing plate (31) to perform a folding action; A folding mechanism, comprising a folding pressing plate (41) and a folding driving unit (42), wherein the folding pressing plate (41) is connected to the folding driving unit (42); The folding pressing plate (41) comprises a folding plane, and the folding driving unit (42) drives the folding plane to move along a curved track, so that after the folding plane partially passes over a folding line (62) of the material, the folded portion (61) of the material is pressed inward.

2. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: The hem folding drive unit (32) comprises a movable bracket (321) and a hem folding lifting seat (322); the movable bracket (321) is drivingly connected to a translation driving component that drives the movable bracket to move forward and backward; and the hem folding lifting seat (322) can move up and down relative to the movable bracket (321).

3. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: The folding drive unit includes a first lifting drive component and a swinging drive component. The first lifting drive component drives the folding pressure plate to move up and down relative to the material receiving platform, and the swinging drive component drives the folding pressure plate to swing up and down relative to the material receiving platform to perform a folding action.

4. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: The frame is also provided with an auxiliary folding plate (7) for folding in cooperation with the folding pressure plate; the auxiliary folding plate (7) is arranged above the material receiving platform (1); the auxiliary folding plate (7) is drivingly connected to the second lifting drive component (8); and the auxiliary folding plate (7) is provided with a folding straight line.

5. The folding and corner pressing device of the paper bag machine according to claim 4, characterized in that: The auxiliary folding plate (7) is also in driving connection with a front and rear driving component that drives it to move forward and backward; or The auxiliary folding plate (7) is also in driving connection with a rotating drive component that drives the auxiliary folding plate (7) to rotate horizontally.

6. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: Auxiliary angle pressing plates (5) are respectively provided on both sides of the hemming pressing plate (31), the hemming driving unit (32) is transmission-connected to the auxiliary angle pressing plates (5), and the auxiliary angle pressing plates (5) are provided with angle pressing bevels (51).

7. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: The curved trajectory includes a broken-line motion trajectory, and the curved trajectory includes a horizontal propulsion section and a vertical downward pressing section.

8. The folding and corner pressing device of the paper bag machine according to claim 7, characterized in that: The folding angle driving unit (42) comprises a fixed seat, a folding angle movable seat (421) and a lifting rod. The fixed seat is provided with a translation guide rail (422), the folded angle movable seat (421) is slidably arranged on the translation guide rail (422), and the first driving component drives the folded angle movable seat (421) to move horizontally along the translation guide rail (422) to realize the horizontal propulsion section; The lifting rod is arranged on the folding angle movable seat (421), the lifting rod is connected to the folding angle pressing plate (41), and the second driving component drives the lifting rod to move up and down in the vertical direction to realize the vertical pressing section.

9. The folding and corner pressing device of the paper bag machine according to claim 8, characterized in that: The translation guide rail (422) is arranged along the front-rear direction. Or the translation guide rail (422) is arranged along the left-right direction; Or the vertical projection of the translation guide rail (422) is perpendicular to the crease line (62) of the material (6).

10. The folding and corner pressing device of the paper bag machine according to claim 1, characterized in that: The curved trajectory comprises an arcuate motion trajectory, the folding angle drive unit (42) comprises a swinging drive unit (423) and a folding angle lifting seat (424), the folding angle lifting seat (424) can move up and down, the folding angle pressing plate (41) is hinged to the bottom of the folding angle lifting seat (424), the folding angle pressing plate (41) is connected to the swinging drive unit (423), and the swinging drive unit (423) drives the folding angle pressing plate (41) to swing downward around a hinge point to realize the arcuate motion trajectory.

Images