Bag making machine for sealed square-bottom bag

Abstract

The utility model relates to the field of packaging machinery, and discloses a bag making machine for a sealed square bottom bag, which comprises a conveying line for continuously conveying paper materials, and a paper roll discharging mechanism, a bag opening pre-cutting mechanism, a cylinder forming and organ edge folding mechanism, a bag cutting mechanism, a bag bottom waste cleaning mechanism and a square bottom forming mechanism are sequentially arranged on the conveying line along the advancing direction of the paper materials. The bag opening pre-cutting mechanism comprises a pre-cutting bayonet and is used for forming a bag opening cutting line with a concave part and a convex part on a paper material; the barrel forming and organ edge folding mechanism is used for folding the paper material into a barrel shape and forming a double-side organ edge structure; the bag breaking mechanism is used for separating the continuous paper tube into single high-low bag bodies along a bag opening cutting line; and the bag bottom waste removing mechanism is used for removing redundant bag bottom waste of the bag body to enable the bag bottom to be flush and comprises a cutter, and a waste adsorption cavity is formed below the cutter. The square-bottom paper bag forming machine can continuously form square-bottom paper bags with seals, waste edges are accurately removed through the waste removing mechanism, it is guaranteed that bag bottoms are square and free of residues, and subsequent bag bottom forming is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of packaging machinery, in particular to a bag making machine for sealing square bottom bags. Background Art

[0002] Existing sealing bag-making machines can only produce paper bags with hexagonal or pasted bottoms, and the following problems exist in the continuous forming process of square bottom bags: waste edges are difficult to handle, because when traditional equipment folds the bag bottom, it is impossible to form a regular square bottom due to the excess waste edges remaining, and manual waste removal is required, which is inefficient; the bag mouth has a single shape, and the bag mouth can only form a straight cutting line due to the pre-cutting of the bag mouth, which is convenient for pasting the bottom of the bag. The protruding part of the bag mouth is rectangular, the appearance is monotonous, and it is easy to have excess parts on both sides after sealing; in addition, traditional paper bags are not waterproof, and their thermal insulation effect is not good. For example, the production equipment for leak-proof paper bags disclosed in the patent with publication number CN114474856A can continuously form paper bags, but its bag mouth is flat, so there is no need to handle the waste edges of the bag bottom, or additional processes are required. Therefore, there is an urgent need for a bag-making machine that integrates waste removal, efficient forming and beautiful sealing functions. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a bag making machine for sealing square bottom bags.

[0004] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0005] A bag making machine for sealing square bottom bags comprises a conveyor line for continuously conveying paper materials, wherein the conveyor line is provided with: a paper roll unwinding mechanism, a bag mouth pre-cutting mechanism, a tube folding accordion edge mechanism, a bag cutting mechanism, a bag bottom waste clearing mechanism, and a square bottom forming mechanism in sequence along the paper material traveling direction.

[0006] The paper roll unloading mechanism is used to release and tension the paper roll raw material; the bag mouth pre-cutting mechanism includes a pre-cutting bayonet, which is used to form a bag mouth cutting line with a concave part and a convex part on the paper material; the tube folding accordion edge mechanism is used to fold the paper material into a tube and form a double-sided accordion edge structure, including a single-sided tube folding guide and accordion edge folding wheels on both sides; the bag breaking mechanism is used to separate the continuous paper roll into a single high and low bag body along the bag mouth cutting line, and the bag breaking mechanism includes a high-speed conveying roller and a low-speed conveying roller, and the high-speed conveying roller and the low-speed conveying roller drive the front and rear bag bodies to produce speed difference separation; the bag bottom waste cleaning mechanism is used to remove excess waste from the bottom of the bag body to make the bag bottom flush, including a cutter, a waste adsorption chamber is arranged under the cutter, and the waste adsorption chamber is connected to a negative pressure source; the square bottom forming mechanism is used to fold and bond the bag bottom to form a sealed square bottom.

[0007] Preferably, the bag bottom waste cleaning mechanism includes an upper mounting wheel and a lower mounting roller, the cutter is arranged on the upper mounting wheel, an adsorption plate is arranged on the lower mounting roller, adsorption holes are arranged on the surface of the adsorption plate, and a gas channel is arranged axially on the lower mounting roller, and the adsorption holes are connected to the negative pressure source through the gas channel.

[0008] Preferably, when the lower mounting roller rotates to be opposite to the upper mounting wheel, the adsorption hole is connected to the negative pressure source, and when the lower mounting roller rotates away from the upper mounting wheel and is opposite to the waste adsorption chamber, the adsorption hole is disconnected from the negative pressure source, and the waste adsorption chamber is connected to the negative pressure source, and the negative pressure sources connected to the two are the same negative pressure source or different negative pressure sources. Both methods need to achieve the connection of the negative pressure connection, and the negative pressure source does not act simultaneously on the waste adsorption chamber and the adsorption hole, which is convenient for realizing the connection between the waste on the lower mounting roller and the waste adsorption.

[0009] Preferably, the bag bottom waste cleaning mechanism includes guide rails arranged on left and right sides, the extension direction of the guide rails is consistent with the conveying direction of the conveyor line, and two upper and lower beams that can slide back and forth synchronously are arranged between the left and right guide rails. The beams are arranged perpendicular to the guide rails. When the beams move forward, the speed matches the paper material conveying speed. The cutters are arranged on the upper beams, and the cutters can move towards or away from each other.

[0010] Preferably, the pre-cutting bayonet is arranged on a roller connected to a rotating power source, and the bag mouth pre-cutting mechanism also includes an easy-tear bayonet.

[0011] As a preference, the paper roll is a paper roll covered with an aluminum film, which can make the paper bag have a better heat preservation function.

[0012] Preferably, it also includes a bag edge gluing device, which is arranged on the side of the roll-forming accordion-folding mechanism or on the side of the conveyor line between the paper roll unloading mechanism and the roll-forming accordion-folding mechanism, and is used for gluing the side edges of paper materials that are not overlapped or not completely overlapped on the conveyor line.

[0013] Preferably, it also includes a taping handle mechanism, and the taping handle position of the taping handle mechanism corresponds to any position after the bag opening pre-breaking mechanism on the conveying line.

[0014] As a preference, a double-sided adhesive tape mechanism is also included, and the adhesive tape attaching position of the double-sided adhesive tape mechanism corresponds to any position after the bag opening pre-breaking mechanism on the conveying line. The tape attaching handle and the double-sided adhesive tape attaching mechanism can be flexibly configured to meet different packaging requirements.

[0015] Preferably, a bag flattening and deviation-correcting mechanism is provided between the bag cutting mechanism and the bag bottom waste clearing mechanism. The bag flattening and deviation-correcting mechanism comprises a flattening member above the paper bag and a push plate driven by a chain at the bottom.

[0016] Preferably, it also includes a bag turning roller, and the tape handle mechanism is located between the bag opening pre-cutting mechanism and the drum folding accordion edge mechanism. The paper material output by the tape handle mechanism passes through and is wound on the side bag turning roller, so that the continuously conveyed paper material switches the front and rear directions on the upper and lower sides of the bag turning roller and turns over. The drum folding accordion edge mechanism presses the upper surface of one of the left and right sides of the paper material, and the paper material on the other left and right sides is folded upward through the drum folding guide, which is used to fold the paper material into a drum and form a double-sided accordion edge structure. By turning the paper material 180°, the tape handle of the bag body after subsequent drum formation can be placed outside, which solves the problem that the tape handle can only be installed in the bag body under the traditional solution.

[0017] Preferably, the tape handle mechanism is located between the bag opening pre-cutting mechanism and the drum forming accordion edge folding mechanism. The drum forming accordion edge folding mechanism presses one of the left and right sides of the paper material on the upper top support member, and the paper material on the other left and right sides is folded downward through the drum folding guide member, so as to fold the paper material into a drum shape and form a double-sided accordion edge structure. Through the reverse drum forming method, one side of the paper material with the tape handle attached to the upper surface is turned downward, so that the upper and lower tape handles are attached to the outside of the bag body, which solves the problem that the lower tape handle of the traditional solution can only be installed inside the bag body.

[0018] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0019] The utility model can continuously form square-bottom paper bags with seals, and accurately remove waste edges through a waste clearing mechanism to ensure that the bag bottom is square and has no residue, which is convenient for subsequent bag bottom forming; because the waste remaining at the sealing part of the bag mouth can be completely cleared, the bag mouth design can be aesthetically pleasing, and the two sides of the bag mouth can be closed without exposing the two sides of the bag body, or the seal can be wavy or serrated, which has both decorative effect and stretch resistance; efficient waste clearing is achieved, and the negative pressure adsorption chamber is used to collect waste and negative pressure adsorption of waste, so that the waste can be completely removed and the work surface can be kept clean and tidy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the utility model having a tape sticking mechanism and a double-sided adhesive sticking mechanism;

[0022] Figure 3 This is a schematic structural diagram of the bag bottom waste removal mechanism of Embodiment 1 of the present utility model;

[0023] Figure 4 yes Figure 3 A partial enlarged view of A;

[0024] Figure 5 It is the overall flow chart of the bag body processing of the utility model.

[0025] The names of the parts indicated by the numerical symbols in the above drawings are as follows: among them, 100, conveyor line; 110, bag body turning roller; 200, paper roll unloading mechanism; 300, bag mouth pre-cutting mechanism; 310, pre-cutting bayonet; 400, tube folding accordion edge mechanism; 410, single-side tube folding guide; 420, accordion edge folding wheel; 500, bag cutting mechanism; 510, low-speed conveying roller; 520, high-speed conveying roller; 600, bag bottom waste cleaning mechanism; 610, upper mounting wheel; 620, lower mounting roller; 630, adsorption plate; 640, adsorption hole; 650, gas channel; 660, cutter; 700, square bottom forming mechanism; 800, tape sticking mechanism; 900, double-sided tape sticking mechanism. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] A bag making machine for sealing square bottom bags, such as Figure 1-2 As shown, it includes a conveyor line 100 for continuously conveying paper materials, and the conveyor line 100 is provided with: a paper roll unloading mechanism 200, a bag mouth pre-cutting mechanism 300, a tube folding accordion edge mechanism 400, a bag cutting mechanism 500, a bag bottom waste clearing mechanism 600, and a square bottom forming mechanism 700 in sequence along the traveling direction of the paper materials.

[0029] The paper roll unloading mechanism 200 is used to release and tension the paper roll raw material; the bag opening pre-cutting mechanism 300 includes a pre-cutting bayonet 310, which is used to form a bag opening cutting line with a concave portion and a convex portion on the paper material. The pre-cutting bayonet 310 is generally set on a roller, and then the knife mold of the pre-cutting bayonet is set according to the required shape and length. The rotation speed is adjusted so that the pre-cutting bayonet 310 corresponds to the cutting line position of each cycle. The bag opening pre-cutting mechanism 300 can also be optionally provided with an easy-tear bayonet to form an easy-tear opening of the bag opening, which is convenient for users to open the bag.

[0030] The tube-forming accordion-folding mechanism 400 is used to fold the paper material into a tube and form a double-sided accordion-edge structure, including a single-sided tube-folding guide 410 and accordion-edge folding wheels 420 on both sides. The single-sided tube-folding guide 410 generally turns one of the left and right sides of the horizontally conveyed paper material to a vertical position, then guides it to a horizontal position, reverses it by nearly 180°, and folds it to form a tube. The single-sided tube-folding guide 410 can be one or more of a plate, a rod, a belt, and a wheel. The front and rear surfaces of the bag body are fitted together under the downward pressure of the limit plate, the limit belt, or the limit rod. The accordion-edge folding wheel 420 guides the side surface between the upper and lower surfaces to fold inward to form an accordion edge. This structure is a conventional setting of personnel in this field, and is not an innovative point of the utility model, so it will not be repeated here.

[0031] The bag cutting mechanism 500 is used to separate the continuous paper roll into individual high and low bag bodies along the bag opening cutting line. The bag cutting mechanism 500 includes a high-speed conveying roller 520 and a low-speed conveying roller 510. The high-speed conveying roller 520 and the low-speed conveying roller 510 drive the front and rear bag bodies to produce speed difference separation.

[0032] The bag bottom waste cleaning mechanism 600 is used to remove excess waste from the bag bottom to make the bag bottom level, and includes a cutter 660. A waste adsorption chamber is provided below the cutter 660, and the waste adsorption chamber is connected to a negative pressure source.

[0033] The square bottom forming mechanism 700 is used to fold and bond the bag bottom to form a sealed square bottom. The square bottom forming mechanism generally includes at least several parts, such as indentation, bag opening, flattening, gluing, bottom folding, and material discharging. This structure is a conventional setting for people in this field. For example, the background technology of the present utility model also introduces the process of bag bottom forming. This structure is not the innovation point of the present utility model and will not be described in detail here.

[0034] like Figure 3-4 As shown, as one embodiment, the bag bottom waste cleaning mechanism 600 includes an upper mounting wheel 610 and a lower mounting roller 620, a cutter 660 is arranged on the upper mounting wheel 610, an adsorption plate 630 is arranged on the lower mounting roller 620, adsorption holes 640 are arranged on the surface of the adsorption plate 630, and a gas channel 650 is axially arranged on the lower mounting roller 620, and the adsorption hole 640 is connected to the negative pressure source through the gas channel 650. Further, when the lower mounting roller 620 rotates to be opposite to the upper mounting wheel 610, the adsorption hole 640 is connected to the negative pressure source, and when the lower mounting roller 620 rotates away from the upper mounting wheel 610 and is opposite to the waste adsorption chamber, the adsorption hole 640 is disconnected from the negative pressure source, and the waste adsorption chamber is connected to the negative pressure source, and the negative pressure sources connected to the two are the same negative pressure source or different negative pressure sources. When the cutter 660 is working, it ensures that the adsorption hole 640 of the lower mounting roller 620 is connected to the negative pressure source, and adsorbs the waste at the position where the adsorption hole 640 is arranged on the surface of the adsorption plate 630. Then, after the lower mounting roller 620 rotates to the position where there is a waste adsorption cavity below, the lower mounting roller is disconnected from the negative pressure source, and the negative pressure source connected to the waste adsorption cavity is opened. The waste adsorption cavity collects the waste and is sucked away by the negative pressure source through the pipeline.

[0035] Optionally, the paper roll is a paper roll covered with an aluminum film. The paper roll is pre-treated with the aluminum film to improve the heat preservation and moisture-proof function of the bag body.

[0036] It also includes a bag edge gluing device, which is arranged on the side of the tube folding accordion edge mechanism 400 or on the side of the conveyor line 100 between the paper roll unloading mechanism 200 and the tube folding accordion edge mechanism 400, and is used to gluing the side edges of paper materials on the conveyor line 100 that are not overlapped or not completely overlapped.

[0037] like Figure 2As shown, as an auxiliary, a taping handle mechanism 800 or / and a double-sided adhesive tape mechanism 900 can be selectively provided, and the taping handle position of the taping handle mechanism 800 corresponds to any position after the bag opening pre-breaking mechanism 300 on the conveyor line 100. The adhesive tape position of the double-sided adhesive tape mechanism 900 corresponds to any position after the bag opening pre-breaking mechanism 300 on the conveyor line 100, so as to facilitate the user to put the material into the bag opening and seal it by himself.

[0038] As an auxiliary, a bag flattening and correcting mechanism can be optionally provided between the bag cutting mechanism 500 and the bag bottom waste clearing mechanism 600. The bag flattening and correcting mechanism includes a flattening member on the top of the paper bag and a push plate driven by a chain at the bottom. The flattening member is a pressing plate or a belt to flatten the paper bag. The push plate can be driven by a chain at the bottom to push each bag body for subsequent waste clearing. The chain is set on the gears at both ends, and the power source of the gears is a motor.

[0039] like Figure 5 As shown in the working principle, the paper roll is unwound by the paper roll unwinding mechanism 200, and the continuous paper material in the front sequence of the conveyor line 100 is conveyed forward by the conveyor roller and conveyed to the bag mouth pre-cutting mechanism 300 after the steps of correction and the like. The pre-cutting bayonet 310 is set on the roller shaft connected to the rotating power source, and rotates to form the bag mouth cutting line. The protruding part of the bag mouth cutting line at the previous bag mouth will become the concave part of the bag bottom of the next bag body. At this time, the paper material still continuously conveyed enters the drum folding accordion edge mechanism 400, and one side of the bag body is turned to the other side. One side is folded, and an accordion concave edge is formed under the action of the accordion edge folding wheels 420 on both sides. At the same time, under the action of the previous gluing, the sides are overlapped and bonded together. The continuous cylindrical bag body is flattened and enters the bag cutting mechanism 500. The high-speed conveying roller 520 on the front side presses and carries the previous bag body, and the low-speed conveying roller 510 on the back presses and drives the next bag body. There will be a speed difference between each two bag bodies to achieve separation. At this time, the bag mouth of the bag body has been completed, and the bottom of the bag is processed. Then the bag body enters the bag bottom waste cleaning mechanism 600. Under the action of the cutter, the bag bottom is flat, and the excess waste enters the waste adsorption chamber, which is sucked out by the negative pressure source and processed separately. The bag body then enters the square bottom forming mechanism 700 for indentation, bottom opening, and bag folding operations, and finally the material is discharged to obtain a complete bag body. If there is a tape sticking mechanism 800 and / or a double-sided tape sticking mechanism 900, the material to be stuck is fed stepwise perpendicularly to the direction of the conveyor line 100, and the material is periodically stuck to the bag opening by a robot or a pressing mechanism.

[0040] Example 2

[0041] As another embodiment, the structure of this embodiment is not shown in the accompanying drawings. The bag bottom waste removal mechanism 600 includes guide rails arranged on the left and right sides. The extension direction of the guide rails is consistent with the conveying direction of the conveyor line 100. Two upper and lower beams that can slide back and forth synchronously are arranged between the left and right guide rails. The beams are arranged perpendicular to the guide rails. When the beams move forward, the speed matches the paper material conveying speed. The cutter 660 is arranged on the upper beam, and the other lower beam is also correspondingly arranged on the other beam. The cutter 660 can move toward or away from the cutter. Here, the movement toward or away from each other can be achieved by driving at least one beam with a cylinder, or by providing a cam on at least one of the two sides of the upper and lower beams so that the two can cooperate in cutting periodically. The beam can be a square column or a cylindrical shape.

[0042] Example 3

[0043] The bag body is preferably taped on both sides before being rolled, but the folding edge of the rolled bag is traditionally inward-folded, which is aimed at the solution where the taped handle is inside the bag body. If the taped handle is to be placed outside, the paper material needs to be turned over or rolled in the reverse direction. As one of the turning methods, this embodiment also includes a bag body turning roller 110. The taped handle mechanism 800 is located between the bag mouth pre-cutting mechanism 300 and the rolled bag folding accordion edge mechanism 400. The paper material output by the taped handle mechanism 800 passes through and is wound on the side bag body turning roller 110. The position of the bag body turning roller 110 can be Figure 2 The paper material is in the middle position, that is, the paper material is transported forward, and the paper material after the bag handle is first transported backward, and then bypasses the bag body turning roller 110 to achieve turning, as long as the paper material transported forward and backward is staggered up and down. It can also be that on the roller frame between the taping handle mechanism 800 and the tube folding accordion edge mechanism 400, more than two rollers are used to make the paper material move backward and then turn forward to the upper or lower front side. After the continuously transported paper material switches the front and rear directions on the upper and lower sides of the bag body turning roller 110 and turns over, the tube folding accordion edge mechanism 400 presses the upper surface of one of the left and right sides of the paper material, and the paper material on the other side is folded upward through the folding tube guide 410, which is used to fold the paper material into a tube and form a double-sided accordion edge structure.

[0044] Example 4

[0045] It is preferred that the bag body has handles attached to both sides before tube formation. However, the traditional folding of tube formation is an upward-turned inward folding type. This is aimed at solutions where the handles are inside the bag body. If the handles are to be placed outside, the paper material needs to be turned over or reversely tubed. Different from Example 3, this embodiment is a reverse tube formation method (not shown in the figure), and there is no need to turn the paper material over. The handle attachment mechanism 800 is located between the bag mouth pre-cutting mechanism 300 and the tube formation accordion edge folding mechanism 400. The tube formation accordion edge folding mechanism 400 presses one of the left and right sides of the paper material on the top support member above, and the paper material on the other left and right sides is folded downward through the tube folding guide 410, which is used to fold the paper material into a tube and form a double-sided accordion edge structure. The paper material is pressed on the top and tubed at the bottom on the other side, which can also achieve the handle outside.

[0046] In the description of the present utility model, 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 utility model 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 a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] 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 bag making machine for sealing square bottom bags, characterized in that: The invention comprises a conveying line (100) for continuously conveying paper materials, wherein the conveying line (100) is provided in sequence along the traveling direction of the paper materials: A paper roll unwinding mechanism (200) is used to release and tension the paper roll raw material; A bag mouth pre-cutting mechanism (300), the bag mouth pre-cutting mechanism (300) comprising a pre-cutting bayonet (310) for forming a bag mouth cutting line having a concave portion and a convex portion on the paper material; A tube-forming and accordion-folding mechanism (400) is used to fold paper material into a tube shape and form a double-sided accordion-edge structure, comprising a single-sided tube-folding guide (410) and accordion-edge folding wheels (420) on both sides; The bag cutting mechanism (500) is used to separate the continuous paper roll into individual high and low bag bodies along the bag opening cutting line. The bag cutting mechanism (500) comprises a high-speed conveying roller (520) and a low-speed conveying roller (510). The high-speed conveying roller (520) and the low-speed conveying roller (510) drive the front and rear bag bodies to separate at different speeds. The bag bottom waste cleaning mechanism (600) is used to remove excess waste from the bag bottom of the bag body to make the bag bottom flush, and comprises a cutter (660). A waste adsorption chamber is arranged below the cutter (660), and the waste adsorption chamber is connected to a negative pressure source; The square bottom forming mechanism (700) is used for folding and bonding the bag bottom to form a sealed square bottom.

2. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: The bag bottom waste removal mechanism (600) comprises an upper mounting wheel (610) and a lower mounting roller (620); a cutter (660) is arranged on the upper mounting wheel (610); an adsorption plate (630) is arranged on the lower mounting roller (620); adsorption holes (640) are arranged on the surface of the adsorption plate (630); a gas channel (650) is axially arranged on the lower mounting roller (620); and the adsorption holes (640) are connected to a negative pressure source via the gas channel (650).

3. The bag-making machine for sealing square bottom bags according to claim 2, characterized in that: When the lower mounting roller (620) rotates to be opposite to the upper mounting wheel (610), the adsorption hole (640) is connected to the negative pressure source; when the lower mounting roller (620) rotates away from the upper mounting wheel (610) and is opposite to the waste adsorption chamber, the adsorption hole (640) is disconnected from the negative pressure source and the waste adsorption chamber is connected to the negative pressure source; the negative pressure sources to which the two are connected may be the same negative pressure source or different negative pressure sources.

4. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: The bag bottom waste removal mechanism (600) comprises guide rails arranged on left and right sides, the extension direction of the guide rails being consistent with the conveying direction of the conveying line (100), and upper and lower cross beams which can synchronously reciprocate and slide are arranged between the left and right guide rails, the cross beams being arranged perpendicular to the guide rails, and when the cross beams move forward, the speed matches the conveying speed of the paper material, and the cutter (660) is arranged on the upper cross beam, and the cutter (660) can move towards or away from each other.

5. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: The pre-cutting bayonet (310) is arranged on a roller shaft connected to a rotation power source, and the bag opening pre-cutting mechanism (300) further comprises an easy-tear bayonet.

6. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: It also includes a bag edge gluing device, which is arranged on the side of the roll forming accordion edge folding mechanism (400) or on the side of the conveyor line (100) between the paper roll unwinding mechanism (200) and the roll forming accordion edge folding mechanism (400) and is used to gluing the side of the paper material on the conveyor line (100) that is not overlapped or not completely overlapped.

7. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: It also includes a taping handle mechanism (800), wherein the taping handle position of the taping handle mechanism (800) corresponds to any position after the bag opening pre-breaking mechanism (300) on the conveying line (100).

8. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: It also includes a double-sided adhesive tape sticking mechanism (900), wherein the sticking position of the double-sided adhesive tape sticking mechanism (900) corresponds to any position after the bag opening pre-cutting mechanism (300) on the conveying line (100).

9. The bag-making machine for sealing square bottom bags according to claim 1, characterized in that: A bag body flattening and deviation-correcting mechanism is provided between the bag cutting mechanism (500) and the bag bottom waste clearing mechanism (600), and the bag body flattening and deviation-correcting mechanism comprises a flattening member above the paper bag and a push plate at the bottom driven by a chain.

10. The bag-making machine for sealing square bottom bags according to claim 7, characterized in that: The bag also includes a bag turning roller (110), a taping handle mechanism (800) located between the bag opening pre-cutting mechanism (300) and the tube folding accordion edge mechanism (400), the paper material output by the taping handle mechanism (800) passes through and is wound around the side bag turning roller (110), so that the continuously transported paper material switches the front and rear directions on the upper and lower sides of the bag turning roller (110) and turns over, the tube folding accordion edge mechanism (400) presses the upper surface of one of the left and right sides of the paper material, and the paper material on the other left and right side is folded upwards through the tube folding guide (410), so as to fold the paper material into a tube and form a double-sided accordion edge structure.

11. The bag-making machine for sealing square bottom bags according to claim 7, characterized in that: The taping mechanism (800) is located between the bag opening pre-cutting mechanism (300) and the tube-forming accordion-edge folding mechanism (400). The tube-forming accordion-edge folding mechanism (400) presses one of the left and right sides of the paper material onto the upper top support member, and the paper material on the other left and right sides is folded downward through the tube-folding guide member (410), so as to fold the paper material into a tube shape and form a double-sided accordion-edge structure.

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