Cushioning sheet manufacturing module and method, and packaging bag manufacturing apparatus and method

Abstract

A cushioning sheet manufacturing module. The module synchronously and continuously feeds a first surface and a second surface, and intermittently applies on each of the first surface and second surface, by means of rolling, first transverse glue perpendicular to the direction of feeding, while continuously applying first longitudinal glue at two side edge positions on the first surface or second surface which face each other; and then press-joins the first surface and the second surface to fix same to each other at the the first transverse glue and first longitudinal glue positions, thus forming a cushioning sheet, air being sealed between the first surface and the second surface. Alternatively, a cushioning layer may also be added between the first surface and the second surface; the first surface, the second surface and the cushioning layer are fixed to each other at the first transverse glue and first longitudinal glue positions, thus forming a cushioning sheet. Compared with existing packaging bag manufacturing apparatuses, using continuous feeding, rolling glue-applying and rolling cutting leads to an increase in production speed, and eliminates the need for turning over and folding a cushioning sheet when forming a packaging bag, enabling the manufacturing of a packaging bag having a greater depth.

Description

Buffer sheet production module and method and packaging bag production equipment and method Technical Field

[0001] The present invention relates to the field of express packaging, and in particular to a buffer pad manufacturing module, packaging bag manufacturing equipment and method. Background Art

[0002] Bubble bags are a common type of packaging bag with a cushioning function. These bags are made of a bubble sheet with a folded bottom and sealed sides. The bubble sheet is generally sheet-like in structure, with multiple bubbles arranged in an array on the inner surface of a plastic film. These bubbles are formed from the plastic film. These bags are commonly used for express delivery and electronic product packaging, and offer excellent cushioning properties. However, because they are made of plastic, these bubble bags are not environmentally friendly and are difficult to degrade. With the increasing demand for plastic reduction, these components are being phased out of the market.

[0003] The all-paper cushioning packaging bag is the most effective environmentally friendly packaging bag, which can completely replace bubble bags in terms of cushioning performance, raw material supply, and environmental convenience.

[0004] An existing all-paper cushioning packaging bag is also made of cushioning sheet material. Specifically, the cushioning sheet material is a strip-shaped structure and is fed in steps along the length direction on the equipment. The cushioning sheet material includes a first surface, a second surface, and at least one layer of a three-dimensional grid liner arranged between the first surface and the second surface, wherein the first surface, the second surface, and the liner are all made of paper material; during production, the first surface, the second surface, and the liner are all fed in steps. On the workbench of the equipment, the first surface, the liner, and the second surface are stacked up and down in sequence and fed. Each time it is fed, it is necessary to spray glue once on the inner and outer surfaces of the first and second surfaces at a gluing position perpendicular to the feeding direction. At the rear end of the glue spraying, the overlapping glue spraying positions are pressed together to fix the first surface, the second surface, and the liner. At this time, for the cushioning sheet material with a strip-shaped structure, the first surface, the second surface, and the liner are all fixed together at intervals at the gluing position perpendicular to the feeding direction.

[0005] When the above-mentioned strip-shaped buffer sheet is made into a packaging bag, it is necessary to use a folding structure to fold the buffer sheet to form the bottom edge of the bag body, and the folding line during folding is near the center line of the strip structure along the length direction. During the folding process, the strip-shaped buffer sheet is still fed in a step-by-step manner. After folding, the positions of gluing on the outside of the first side, that is, on the upper surface of the strip sheet, overlap. After pressing again, the gluing positions are fixed as the side edges of the packaging bag. The two adjacent gluing positions form the two side edges of a packaging bag. At this time, the accommodation depth of the packaging bag is only half of the original strip-shaped buffer sheet. After folding to form a packaging bag, since multiple packaging bags are connected in sequence at the side edges and are still a strip-shaped structure, the connected glued sides are then cut. After cutting, multiple independent packaging bags are formed, and the fixed width of the side edge of each packaging bag is only half of the original glued width. There are many shortcomings in making packaging bags in this way. Specifically, there are the following technical problems:

[0006] 1. The speed is slow. In the existing production of cushioning packaging bags, due to the step-by-step production method, each step requires waiting for the time of gluing, pressing and cutting the side. Only after the gluing, pressing and cutting are completed can the next step be carried out, so the production efficiency is low.

[0007] 2. When the strip-shaped buffer sheet is made into a packaging bag, it needs to be folded. However, the depth of the folded packaging bag is only half of the original buffer sheet, which is not conducive to the production of large-sized packaging bags.

[0008] 3. The bottom of the packaging bag is formed by the folded buffer sheet, which is not fixed with glue. The fixing strength is insufficient and may be damaged and cracked.

[0009] Summary of the Invention

[0010] The purpose of the present invention is to provide a method for manufacturing a buffer sheet, aiming to solve the technical problem of slow manufacturing speed using existing manufacturing methods in the background art.

[0011] Wherein, the buffer sheet includes a first surface and a second surface.

[0012] The buffer sheet manufacturing method includes:

[0013] Step S1: unwinding or feeding a first surface and a second surface, wherein a first horizontal glue and a first vertical glue are provided on at least one of the first surface and the second surface, and the first horizontal glue and the first vertical glue are located on the first surface and / or the second surface and are provided toward a side surface of the other first surface or the second surface; the first horizontal glue is perpendicular to the feeding direction and is arranged at intervals along the feeding direction, and the intervals are uniform; the first vertical glue is continuously provided along both side edges in the feeding direction; the first surface and the second surface are stacked up and down and arranged on a workbench, and are fed synchronously and continuously;

[0014] Wherein, when the first horizontal glue and the first vertical glue are provided on both the first surface and the second surface, the first horizontal glue on the first surface corresponds to the first horizontal glue on the second surface after continuous feeding, and the first vertical glue on the first surface corresponds to the first vertical glue on the second surface after continuous feeding;

[0015] Step S2: rolling the first surface and the second surface after the first horizontal glue and the first vertical glue are applied in a stacked state, and fixing the first surface and the second surface to each other at the position of the first horizontal glue, and fixing the first surface and the second surface to each other at the position of the first vertical glue, so as to form a buffer sheet;

[0016] The buffer sheet is sealed with gas between the first horizontal glue and the first vertical glue, so that the buffer sheet has a buffering effect.

[0017] In this method, a buffer layer can be further added between the first surface and the second surface, and the buffer layer has a buffering property. In this method, the first surface and the second surface, or the first surface, the second surface and the buffer layer are all fed continuously, that is, during the entire feeding process, the first surface, the buffer layer and the second surface are all in a continuous motion and do not stop; during the continuous feeding process, rolling glue is used when applying the first horizontal glue to the first surface, the buffer layer and the second surface, and continuous glue is used when applying the first longitudinal glue to the first surface and / or the second surface, or the buffer layer, such as spraying glue or coating glue. This glue application method can cooperate with the continuous feeding process to achieve glue application without stopping feeding and waiting. Compared with the step-by-step feeding method of applying glue and waiting in the time interval between two steps, the production efficiency is greatly improved; in addition, when the first surface, the second surface and the buffer layer are pressed together, a rolling method is also used to ensure smooth feeding of the front end of the continuous feeding.

[0018] The present invention also discloses a method for manufacturing a packaging bag, which comprises:

[0019] Step D1: using the buffer sheet manufacturing method to manufacture two buffer sheets, the two buffer sheets are respectively a first sheet and a second sheet, the first sheet and the second sheet are stacked on each other, and the second sheet is located below the first sheet; after the first sheet and the second sheet are stacked, the position of the first horizontal glue of the first sheet corresponds to the position of the first horizontal glue of the second sheet, and the position of the first vertical glue of the first sheet corresponds to the position of the first vertical glue of the second sheet; wherein, when manufacturing the first sheet and the second sheet, the first sheet or the second sheet is provided with a position of the second horizontal glue on at least one side facing each other, and the position of the second vertical glue is provided on at least one side facing each other of the first sheet or the second sheet, the position of the second vertical glue is only located on one side edge of the first sheet or the second sheet along the feeding direction, and the positions of the stacked first sheet and the second sheet are such that the position of the second horizontal glue is opposite to the position of the first horizontal glue, and the position of the second vertical glue is opposite to the position of the first vertical glue on one side;

[0020] Step D2: The stacked first sheet and the second sheet are fed synchronously and rolled in a stacked state so that the first sheet and the second sheet are fixed to each other at the second transverse glue position and the second longitudinal glue position, thereby forming the packaging bag with fixed sides.

[0021] In this packaging bag manufacturing method, a first sheet and a second sheet are stacked and continuously fed. During the continuous feeding process, a second horizontal glue is applied to at least one side of the first sheet and the second sheet facing each other to form a second horizontal glue position, and a second longitudinal glue is applied to form a second longitudinal glue position. The first sheet and the second sheet are then rolled at the second horizontal glue position and the second longitudinal glue position to secure the first sheet and the second sheet to form a packaging bag. The second longitudinal glue position is only located on one edge of the first sheet or the second sheet along the feeding direction, and no glue is applied to the other edge of the first sheet or the second sheet along the feeding direction, thereby naturally forming an opening of the packaging bag.

[0022] In this method, the first and second sheets fed continuously can match the first side, second side and buffer layer of the buffer sheet, saving equipment space and reducing process difficulty. That is, the first and second sheets can be produced respectively at the front end of the same equipment, and the first and second sheets are glued and rolled at the rear end of the equipment to produce packaging bags. The entire equipment adopts the same continuous feeding method, and the feeding speed at the front and rear ends is the same, so that the packaging bags can be produced with the greatest convenience.

[0023] In addition, the depth of the packaging bag produced by this method is basically the width of the first sheet or the second sheet perpendicular to the feeding direction. Compared with the existing technology, the buffer sheet needs to be folded and fed step by step during the folding process. This can help to produce packaging bags with larger depth and higher production efficiency.

[0024] In existing methods of making packaging bags by folding cushioning sheets, the bottom of the bag is formed by the folded cushioning sheet itself, without gluing, resulting in insufficient fixing strength. However, in this method, the bottom of the bag is formed by gluing the first and second sheets together at the second longitudinal glue point. This gluing improves the fixing strength of the bottom of the bag.

[0025] The present invention also discloses another method for making a packaging bag, which comprises:

[0026] Step A1: Two buffer sheets are produced using the method described above. The two buffer sheets are a first sheet and a second sheet, with the second sheet located below the first sheet. The width of the first sheet perpendicular to the feeding direction is smaller than the width of the second sheet perpendicular to the feeding direction, and the second sheet extends beyond the first sheet on both sides to form a first edge and a second edge. The first sheet and the second sheet are stacked on each other and fed continuously.

[0027] After the first sheet and the second sheet are stacked, the position of the first horizontal glue of the first sheet corresponds to the position of the first horizontal glue of the second sheet, and the position of the first longitudinal glue of the second sheet is located outside the position of the first longitudinal glue of the first sheet; wherein, when the first sheet and the second sheet are manufactured, the first sheet or the second sheet is provided with a second horizontal glue position on at least one side facing each other, and the second sheet is provided with a second longitudinal glue position on a side facing the first sheet, and the second longitudinal glue position is only located at the first edge or the second edge of the second sheet along the feeding direction, and the first sheet and the second sheet are stacked so that the position of the second horizontal glue position is opposite to the position of the first horizontal glue position;

[0028] Step A2: synchronously feeding the stacked first sheet and the second sheet and rolling them in a stacked state, so that the first sheet and the second sheet are fixed to each other at the position of the second horizontal glue;

[0029] Step A3: The stacked first sheet and the second sheet are fed synchronously in a stacked state, and the first edge or the second edge of the second sheet having the second longitudinal glue position is folded toward one side of the first sheet, and the first edge or the second edge having the second longitudinal glue position is rolled after folding, so that the first sheet and the second sheet are fixed to each other at the second longitudinal glue position, thereby forming the packaging bag.

[0030] In this packaging bag manufacturing method, the buffer sheets produced have different widths. The width of the second sheet, located above, is smaller than that of the first sheet, located below. Both sides of the second sheet extend beyond the first sheet, forming a first edge and a second edge. A second longitudinal adhesive is applied to the first or second edge, forming a location for the second longitudinal adhesive. The first or second edge with the second longitudinal adhesive is folded toward the first sheet, and the location for the second longitudinal adhesive is adhered to the first sheet, forming the bottom of the packaging bag. In this manner, the packaging bag produced by combining the first and second sheets reduces the width of the first and second sheets directly pressed together at the location of the first transverse adhesive compared to the packaging bag produced by the previous packaging bag manufacturing method, resulting in a greater depth for the packaging bag produced by this method.

[0031] The present invention also discloses a buffer sheet manufacturing module, which includes:

[0032] The production module includes:

[0033] a first unwinding unit, which is disposed on the machine platform and is used to unwind the first surface and continuously feed the first surface along the length direction of the machine platform;

[0034] a second unwinding unit, the second unwinding unit being arranged on the machine table, for unwinding the second surface and feeding the second surface synchronously and continuously with the first surface along the length direction of the machine table, the second surface being located below the first surface; first horizontal glue being applied at intervals perpendicular to the feeding direction on the first surface and / or the second surface on a side facing the other first surface or the second surface; first longitudinal glue being applied continuously along both side edges in the feeding direction on the first surface and / or the second surface on a side facing the other first surface or the second surface; the position of the first horizontal glue on the first surface and the position of the first horizontal glue on the second surface being opposite to each other during the feeding process, and the position of the first longitudinal glue on the first surface and the position of the first longitudinal glue on the second surface being opposite to each other during the feeding process;

[0035] A paper pressing unit is used to roll, clamp and press the position of the first horizontal glue and the position of the first longitudinal glue set on the first surface and / or the second surface, so as to press and fix the first surface and the second surface at the position of the first horizontal glue and the position of the first longitudinal glue, thereby forming the buffer sheet, wherein gas is sealed between the first surface and the second surface to give the buffer sheet a buffering effect.

[0036] When manufacturing the module, a buffer sheet having a buffer layer and sandwiched between the first surface and the second surface may also be manufactured.

[0037] The buffer sheet production module of the present invention uses a continuous feeding method to feed the first surface, the second surface, and the buffer layer formed by stretching the third surface. During the feeding process, the first horizontal glue and the first vertical glue are applied to the first surface, the second surface, and the buffer layer, respectively. Alternatively, the first surface, the second surface, and the buffer layer are already provided with the first horizontal glue and the first vertical glue. The first surface, the second surface, and the buffer layer are then rolled and pressed together during the feeding process to produce the buffer sheet. Compared to existing buffer sheet production modules, this method does not use a step-by-step feeding method, which can improve production efficiency.

[0038] The present invention also discloses a packaging bag making device, which includes:

[0039] Two buffer sheet production modules, one for producing a first buffer sheet, and the other for producing another buffer sheet for a second buffer sheet, wherein the first sheet is positioned above the second sheet and overlaps with the second sheet, and is fed synchronously and continuously;

[0040] a fifth gluing structure, wherein the first sheet is rolled and glued toward the side of the second sheet so that second horizontal glue perpendicular to the feeding direction is applied to the second side of the first sheet at intervals, or the second sheet is rolled and glued toward the side of the first sheet so that second horizontal glue perpendicular to the feeding direction is applied to the first side of the second sheet at intervals, and the position of the second horizontal glue is opposite to the position of the first horizontal glue on the first sheet or the second sheet;

[0041] a bag-forming glue-applying structure for continuously applying a second longitudinal glue to the side of the first sheet facing the second sheet and / or the side of the second sheet facing the first sheet, wherein the bag-forming glue-applying structure applies glue to a side edge of the first sheet or the second sheet along the length direction, wherein the position of the continuously applied second longitudinal glue is continuous along the length direction, and the position of the second longitudinal glue is opposite to one of the positions of the first longitudinal glue on the first sheet or the second sheet;

[0042] At least one set of pressing rollers, the pressing rollers being arranged at the rear end of the bagging and gluing structure, clamping the first sheet and the second sheet, and rolling the second longitudinal glue position after gluing by the bagging and gluing structure and the second transverse glue position perpendicular to the feeding direction on the first or second surface opposite to each other on the first sheet or the second sheet, thereby fixing the first sheet and the second sheet;

[0043] The rolling and cutting module is arranged at the rear end of the pressing roller, and is used to clamp the first and second sheets after being pressed and fixed, and cut the fixed first and second sheets at the position of the second horizontal glue during the rolling process, thereby forming multiple packaging bags during the continuous feeding process.

[0044] In this packaging bag making equipment, two sheets of buffer sheet material are synchronously and continuously fed to a bag-forming gluing mechanism. The bag-forming gluing mechanism applies a second longitudinal glue to at least one side edge of the first and second sheets facing each other along a direction perpendicular to the feeding direction, thereby forming a second longitudinal glue position. Simultaneously, during the process of making the buffer sheet material, a buffer sheet making module applies a second transverse glue position at intervals to at least one side of the first and second sheets facing each other, thereby forming a second transverse glue position. The second transverse glue position corresponds to the first transverse glue position on the first and second sheets. The first and second sheets are then fixed by rolling the second transverse glue position and the second longitudinal glue position by a pressing roller. The sheet material is then cut by a rolling cutting module at the second transverse glue position to form a packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of a buffer sheet;

[0046] FIG2 is a schematic diagram of die-cutting and stretching the third surface to form a buffer layer;

[0047] FIG3 is a schematic flow chart of a method for producing a buffer sheet according to the present invention;

[0048] FIG4 is a schematic diagram of the process of making a buffer sheet;

[0049] FIG5 is a schematic diagram of the cutting process when making a buffer sheet;

[0050] FIG6 is a schematic diagram of the manufacturing process of a buffer sheet having two buffer layers;

[0051] FIG7 is a schematic diagram of a manufacturing process of a buffer sheet of another structure;

[0052] FIG8 is a schematic diagram of the superposition of the first and second surfaces of the buffer sheet produced in FIG7 ;

[0053] FIG9 is a schematic diagram of a buffer sheet with a buffer layer having other structures;

[0054] FIG10 is a schematic diagram of a method for manufacturing a buffer sheet without a buffer layer;

[0055] FIG11 is another schematic flow chart of a packaging bag manufacturing method;

[0056] 12 is a schematic diagram of the structure of two buffer sheets for making a packaging bag according to the present invention;

[0057] FIG13 is a schematic structural diagram of a packaging bag of the present invention;

[0058] 14 and 15 are schematic structural diagrams of the packaging bag of FIG. 13 of the present invention with a pasted cover;

[0059] FIG16 is a schematic structural diagram of a different adhesive cover from FIG14;

[0060] FIG17 is another schematic structural diagram of two buffer sheets for making a packaging bag according to the present invention;

[0061] Figures 18 and 19 are schematic diagrams of the packaging bag structure produced by the method of Figure 17;

[0062] FIG20 is a schematic structural diagram of a buffer sheet production module.

[0063] 21 and 22 are schematic structural diagrams of a paper pressing unit;

[0064] FIG23 is a schematic diagram of a buffer sheet manufacturing module structure for manufacturing a buffer sheet without a buffer layer;

[0065] FIG24 is a schematic structural diagram of a buffer sheet manufacturing module for manufacturing a buffer sheet having two buffer layers;

[0066] FIG25 is a schematic diagram of the structure of a buffer sheet production module for directly unwinding the first, second and third surfaces;

[0067] Figure 26 is a schematic structural diagram of a cutting roller;

[0068] FIG27 is a schematic diagram of a first sizing structure;

[0069] FIG28 is a schematic diagram of the first gluing structure when gluing is applied on both the first and second sides;

[0070] FIG29 is a schematic structural diagram of a production module for producing a buffer sheet having an outer side glued;

[0071] Figure 30 is a schematic diagram of a portion of the structure of a packaging bag making device;

[0072] Figure 31 is a schematic structural diagram of the rolling cutting module;

[0073] FIG32 is a schematic structural diagram of a cover paper module and a release paper module;

[0074] FIG33 is another structural schematic diagram of a packaging bag making device;

[0075] FIG34 is a schematic structural diagram of a packaging bag making device having a folding module;

[0076] FIG35 is a schematic diagram of a folding structure;

[0077] Figure 36 is a comparison diagram of packaging bags produced by packaging bag production equipment with a folding structure. DETAILED DESCRIPTION

[0078] The present invention will be further described and explained below in conjunction with specific embodiments and accompanying drawings:

[0079] Please refer to Figures 1 and 2. The present invention first discloses a method for manufacturing a buffer sheet 100. The buffer sheet 100 in the manufacturing method includes a first surface 10 and a second surface 20, and may also include the first surface 10 and the first surface 20 and a buffer layer 301 clamped and fixed between the first surface 10 and the second surface 20.

[0080] The buffer sheet manufacturing method of the present invention has a variety of different implementation methods, which are as follows:

[0081] Implementation method one:

[0082] As shown in Figure 2, in this embodiment, the buffer layer 301 is formed by stretching after die-cutting the third surface 30. The first surface 10, the second surface 20, and the third surface 30 are all made of environmentally friendly paper. After die-cutting or cutting, the third surface 30 forms a plurality of arranged slits 310. The slits 310 have multiple rows, and the multiple slits 310 in the same row are spaced apart. The slits 310 in adjacent rows are staggered with each other, thus forming the die-cut paper 31. When an external force perpendicular to the direction of the slits 310 is applied to the die-cut paper 31, the slits 310 are twisted and deformed into the shape of three-dimensional openings 312. After all the slits 310 in the multiple rows are twisted and deformed into three-dimensional openings 312, the buffer layer 301 is formed. The buffer layer 301 has a grid structure. At this time, the buffer layer 301 expands compared to the thickness of the third surface 30, which can provide a buffering and protective effect.

[0083] Of course, in the present invention, after cutting the third surface 30 , the thickness of the third surface 30 can be increased by stretching, and other cutting methods to form a three-dimensional grid structure can also achieve the purpose of the present invention.

[0084] Referring to Figures 3 and 4, step S1: unwinding or feeding the first surface 10, the second surface 20 and a buffer layer 301, the first surface 10, the buffer layer 301 and the second surface 20 are provided with first horizontal glue positions P11, the first horizontal glue positions P11 are perpendicular to the feeding direction and arranged at intervals along the feeding direction, and the intervals are the same. During the unwinding or feeding process of the first surface 10, the second surface 20 and the buffer layer 301, rolling glue is applied to form the first horizontal glue positions P11.

[0085] Alternatively, the first horizontal adhesive tape is disposed at the position P11 on the first surface 10 and the second surface 20 , while the first horizontal adhesive tape is not disposed at the position P11 on the buffer layer 301 .

[0086] Rolling gluing means: gluing is applied to the first surface 10, the second surface 20 and the buffer layer 301 by a gluing roller 40 in contact with the first surface 10, the second surface 20 and the buffer layer 301, and a gluing position 41 is provided on the outer peripheral surface of the gluing roller 40. The gluing position 41 is perpendicular to the feeding direction of the machine and extends from one end of the gluing roller 40 toward the other end. The gluing roller 40 is provided perpendicular to the feeding direction; when the gluing roller 40 rotates, glue is applied to the first surface 10, the second surface 20 and the buffer layer 301 only when the gluing position contacts the first surface 10, the second surface 20 or the buffer layer 301. After gluing, a first horizontal glue position P11 is formed on the first surface 10, the second surface 20 and the buffer layer 301.

[0087] After gluing the first horizontal glue at position P11, the first horizontal glue at position P11 on the first surface 10 corresponds to the first horizontal glue at position P11 on the buffer layer 301 and the second surface 20 after continuous feeding, so that the first surface 10, the buffer layer 301 and the second surface 20 are fixed to each other at position P11 of the first horizontal glue.

[0088] Specifically, three glue rollers 40 are provided, each corresponding to the first surface 10, the second surface 20, and the buffer layer 301. The three glue rollers 40 are arranged at intervals in the feeding direction. After one glue roller 40 rotates and applies glue to the first surface 10, when the buffer layer 301, which is continuously fed synchronously with the first surface 10, moves to the second glue roller 40, and at the same time, the position P11 of the first horizontal glue applied on the first surface 10 is below the second glue roller 40, the second glue roller 40 applies glue to the buffer layer 301 again. In this way, the position P11 of the first horizontal glue on the buffer layer 301 and the position P11 of the first horizontal glue on the first surface 10 form a relative relationship. Similarly, when the third glue roller 40 applies glue to the second surface 20, only when the position P11 of the first horizontal glue on the first surface 10 and the position P11 of the first horizontal glue on the buffer layer 301 move below the third glue roller 40, the third glue roller 40 applies glue to the second surface 20. The arrangement of the three gluing rollers 40 follows an inherent pattern. Preferably, the spacing between two adjacent gluing rollers 40 is an integer multiple of the distance between two adjacent first horizontal glue positions P11 on the first surface 10. The circumference of each gluing roller 40 after one rotation is precisely the distance between two adjacent first horizontal glue positions P11. Each rotation of the gluing roller 40 corresponds to a continuous gluing spacing of the first surface 10, the second surface 20, and the buffer layer 301, i.e., the distance between two adjacent first horizontal glue positions P11.

[0089] In addition, in this step, the first surface 10 and the second surface 20 are provided with a first longitudinal glue position P12, and the first longitudinal glue position P12 is located on one side of the first surface 10 and the second surface 20 facing the buffer layer 301, and the first longitudinal glue position P12 is the two side edges of the first surface 10 and the second surface 20 along the feeding direction.

[0090] Among them, the position P12 of the first longitudinal glue is formed by continuously applying the first longitudinal glue, that is, by spraying or coating, such as by a nozzle 50, continuously spraying on both sides of the first surface 10 and the second surface 20 along the feeding direction, forming a strip-shaped area together with the first surface 10, the second surface 20 and the buffer layer 301, that is, the position P12 of the first longitudinal glue.

[0091] Of course, the buffer layer 301 may also be continuously sprayed on both sides along the feeding direction to form the first longitudinal glue position P12, thereby better fixing the first surface 10, the buffer layer 301 and the second surface 20 to each other at the first longitudinal glue position P12.

[0092] In the present invention, both the continuous gluing and rolling gluing actions are completed in the process of continuous and synchronous feeding of the first surface 10, the buffer layer 301 and the second surface 20, that is, the gluing is performed in the process of continuous and synchronous feeding of the first surface 10, the buffer layer 301 and the second surface 20. On the one hand, compared with the existing step-by-step feeding method, this can save working time and there is no need to wait for gluing time. On the other hand, the first surface 10, the second surface 20 and the buffer layer 301 can be fixed shortly after gluing, which can ensure the strength of the fixation.

[0093] Of course, in other embodiments of the present invention, the first horizontal glue and the first longitudinal glue may be applied to the first surface 10, the second surface 20, the buffer layer 301 or the third surface 30 in advance to form the position P11 of the first horizontal glue and the position P12 of the first longitudinal glue, respectively. Then, the first surface 10, the second surface 20 and the buffer layer 301 are unwound synchronously, and during unwinding, it is ensured that the positions P11 of the first horizontal glue on the first surface 10, the second surface 20 and the buffer layer 301 are relative to each other, and the positions P12 of the first longitudinal glue are relative to each other.

[0094] In this step, the first surface 10 , the buffer layer 301 and the second surface 20 are stacked up and arranged on a workbench and fed continuously and synchronously.

[0095] 2 and 4 , in this embodiment, the buffer layer 301 is formed by:

[0096] Step S11: unwinding the third surface 30, and cutting a plurality of arranged slits on the third surface 30 while unwinding the third surface 30, wherein the slits are arranged in multiple rows, the slits in the same row are arranged at intervals, and the slits in adjacent rows are staggered with each other, thereby forming die-cut paper;

[0097] Step S12: The die-cut paper is continuously fed, and the feeding speed at the rear end is adjusted to be greater than the feeding speed at the front end, so that the die-cut paper is stretched to form a buffer layer 301 with a three-dimensional grid structure.

[0098] Step S2: After the first horizontal glue and the first longitudinal glue are applied, the first surface 10, the buffer layer 301, and the second surface 20 are rolled in a stacked state, and the first surface 10, the buffer layer 301, and the second surface 20 are fixed to each other at the position P11 of the first horizontal glue. At the same time, the first surface 10, the buffer layer 301, and the second surface 20 are fixed to each other at the position P12 of the first longitudinal glue to form a buffer sheet.

[0099] In this embodiment, when the first surface 10 , the buffer layer 301 and the second surface 20 are rolled in a stacked state, the first surface 10 , the buffer layer 301 and the second surface 20 are only pressed at the first horizontal glue position P11 and the first vertical glue position P12 .

[0100] In this embodiment, pressing only the first horizontal glue position P11 and the first vertical glue position P12 can ensure that the buffer layer 301 between the two adjacent first horizontal glue positions P11 maintains a three-dimensional grid structure in the unpressed state, thereby playing a buffering and protective role. Otherwise, the problem of the buffer layer 301 expanding after being pressed is squeezed, thereby reducing the buffering effect.

[0101] Furthermore, after the first horizontal adhesive tape is pressed together at position P11 and the first vertical adhesive tape at position P12, the first surface 10, the cushioning layer 301, and the second surface 20 form a structure similar to a three-dimensional grid with four closed edges and the cushioning layer 301 in the center fixed and clamped by the first surface 10 and the second surface 20. This structure can be wrapped around the surface of an object to provide cushioning, shock absorption, and thermal insulation.

[0102] In this embodiment, the width of the buffer layer 301 perpendicular to the feeding direction is the same as the width of the first surface 10 or the second surface 20. When the position P12 of the first longitudinal glue on the first surface 10 is fixedly pressed with the position P12 of the first longitudinal glue on the buffer layer 301 and the second surface 20, the buffer layer 301 at the position P12 of the first longitudinal glue is flattened into a planar structure, and the buffer layer 301 at the position P12 of the first longitudinal glue is a planar grid structure. The planar grid buffer layer 301, the first surface 10 and the second surface 20 are fixed to each other, and the fixing strength is increased.

[0103] Referring to FIG5 , the method of this embodiment further includes:

[0104] Step S3: The formed buffer sheet is heated while being fed, so that the first horizontal glue position P11 and the first longitudinal glue position P12 are pressed together and firmly fixed.

[0105] Step S4: Roll-cut the buffer sheet at at least two adjacent or spaced first horizontal glue locations P11 to form buffer units 110. Buffer units 110 are used for thermal insulation or wrapping and protecting items. The buffer units 110 of the present invention can be tailored to their desired length. For example, cutting at intervals of two first horizontal glue locations P11 creates a buffer unit 110 with three glue intervals, or cutting at intervals of four first horizontal glue locations P11 creates a buffer unit 110 with five glue intervals.

[0106] During the production process of the buffer sheet of the present invention, the first surface 10, the second surface 20 and the third surface 30 are fed in a continuous manner. The first horizontal glue and the first vertical glue are applied on the first surface 10, the second surface 20 and the third surface 30 to ensure that the feeding is not stopped, especially the rolling gluing and continuous gluing are adopted; in addition, in the process of continuous feeding, the first surface 10, the second surface 20 and the buffer layer 301 are fixed at the position P11 of the first horizontal glue and the position P12 of the first vertical glue by rolling pressing, which perfectly matches the continuous feeding; and rolling cutting is also adopted when cutting at the position P11 of the first horizontal glue at the rear end, and the cutting interval of the rolling cutting is just set to a gluing interval, which can ensure that a cutting can be achieved at the position P11 of the first horizontal glue every time it is rolled.

[0107] In this embodiment, the buffer layer 312 can also be a slit structure of other shapes by cutting on the third surface 30, for example, the slit is a triangle, or a quadrilateral, or a combination of curves. As long as it is cut on the third surface and stretched to expand in the thickness direction, the structure can have a buffering function.

[0108] Implementation method 2:

[0109] As shown in FIG6 , the difference between this embodiment and the first embodiment is that the unrolled or fed buffer layer 301 is two layers. Of course, more layers of buffer layer 301 may also be provided.

[0110] Among them, when the buffer layer 301 is two layers, compared with the first embodiment, when rolling the first horizontal glue to the first surface 10, the second surface 20 and the buffer layer 301, it is necessary to add a glue roller 40, and at the same time ensure that the two layers of buffer layers 301 can apply the first horizontal glue at a position opposite to the position P11 of the first horizontal glue on the first surface 10. The positions P11 of the first horizontal glue after rolling the two layers of buffer layers 301 are also opposite to each other, and opposite to the position P11 of the first horizontal glue on the second surface 20.

[0111] Furthermore, when applying the first longitudinal glue continuously to the first and second surfaces 10, 20, it is necessary to apply the first longitudinal glue to both buffer layers 301, forming first longitudinal glue positions P12. First longitudinal glue positions P12 on both buffer layers 301 are located on opposite sides along the feeding direction. First longitudinal glue positions P12 on the buffer layers 301 are opposite to first longitudinal glue positions P12 on the first and second surfaces 10, 20.

[0112] Implementation method three:

[0113] Referring to Figures 7 and 8, the difference between this embodiment and embodiment 1 is that the width X3 of the buffer layer 301 perpendicular to the feeding direction is smaller than the width X1 of the first surface 10 and the second surface 20 perpendicular to the feeding direction, the width X1 of the first surface 10 and the second surface 20 perpendicular to the feeding direction are the same, the first surface 10 and the second surface 20 extend out of the buffer layer 301 on both sides of the width perpendicular to the feeding direction, and the first surface 10 and the second surface 20 completely cover the buffer layer 301; the first surface 10 and the second surface 20 are fixed to each other at the first longitudinal glue position P12 to clamp the buffer layer 301 between the first surface 10 and the second surface 20.

[0114] In this embodiment, it is not necessary to apply the first longitudinal glue on the buffer layer 301. The position P12 of the first longitudinal glue applied on the first surface 10 and the second surface 20 is located at the two side end positions of the first surface 10 or the second surface 20 extending out of the buffer layer 301. When the first surface 10 and the second surface 20 are fixed at the position P12 of the first longitudinal glue, the buffer layer 301 is wrapped inside the first surface 10 and the second surface 20; at this time, the position P11 of the first horizontal glue set on the buffer layer 301 still remains opposite to the position P11 of the first horizontal glue on the first surface 10 and the second surface 20.

[0115] In this embodiment, compared with the first embodiment, the step of applying the first longitudinal glue to the buffer layer 301 of the three-dimensional grid structure is reduced, which is beneficial to improving production efficiency.

[0116] Regarding rolling gluing and continuous gluing in the above embodiments 1 to 3, it should be noted that when applying glue, it is only necessary to apply glue to at least one of the two adjacent surfaces of the first surface 10, at least one buffer layer 301 and the second surface 20. In order to improve the fixing strength, glue can also be applied to both adjacent surfaces.

[0117] For example, when the first surface 10, a buffer layer 301, and the second surface 20 are stacked and fed continuously, the first horizontal glue and the first vertical glue can be applied to the side of the first surface 10 facing the buffer layer 301, and the first horizontal glue and the first vertical glue can be applied to the side of the second surface 20 facing the buffer layer 301. In this case, after the first surface 10, the buffer layer 301, and the second surface 20 are pressed together, the first horizontal glue and the first vertical glue on the first surface 10 are fixed to the buffer layer 301, and the first horizontal glue and the first vertical glue on the second surface 20 are also fixed to the buffer layer 301, thereby fixing the first surface 10, the second surface 20, and the buffer layer 301 to each other.

[0118] For another example, when the first surface 10, a buffer layer 301, and the second surface 20 are stacked and continuously fed, a first horizontal adhesive and a first vertical adhesive can be applied to the side of the first surface 10 facing the buffer layer 301, and a first horizontal adhesive and a first vertical adhesive can be applied to the side of the buffer layer 301 facing the first surface 10 and / or the second surface 20, and at the same time, a first horizontal adhesive and a first vertical adhesive can be applied to the side of the second surface 20 facing the buffer layer 301. At this time, after the first surface 10, the buffer layer 301, and the second surface 20 are pressed together, the first horizontal adhesive and the first vertical adhesive on the first surface 10 are fixed to the buffer layer 301, the first horizontal adhesive and the first vertical adhesive on the buffer layer 301 are fixed to the first surface 10 and / or the second surface 20, respectively, and the first horizontal adhesive and the first vertical adhesive on the second surface 20 are also fixed to the buffer layer 301, thereby fixing the first surface 10, the second surface 20, and the buffer layer 301 to each other, and this fixing method is more secure.

[0119] For another example: when the first surface 10, a buffer layer 301, and the second surface 20 are stacked and continuously fed, and the width of the buffer layer 301 is smaller than the width of the first surface 10 and the second surface 20, and the ends of the width of the first surface 10 and the second surface 20 extend out of the buffer layer 301, the first horizontal glue and the first vertical glue can be applied to the side of the first surface 10 facing the buffer layer 301, and the first horizontal glue and the first vertical glue can be applied to the side of the second surface 20 facing the buffer layer 301. In this case, after the first surface 10, the buffer layer 301, and the second surface 20 are pressed together, the first horizontal glue and the first vertical glue on the first surface 10 are fixed to the buffer layer 301, and the first horizontal glue and the first vertical glue on the second surface 20 are also fixed to the buffer layer 301, thereby fixing the first surface 10, the second surface 20, and the buffer layer 301 to each other.

[0120] In short, the positions of applying the first horizontal glue and the first vertical glue on the first surface 10, the buffer layer 301 and the second surface 20 can ensure that the first surface 10, the buffer layer 301 and the second surface 20 can be fixed to each other at the position P11 of the first horizontal glue and the position P12 of the first vertical glue.

[0121] Implementation method four:

[0122] As shown in FIG9 , the only difference between this embodiment and the first embodiment is that the buffer layer 312 is not a three-dimensional grid structure and is not a structure formed by stretching die-cut paper.

[0123] The buffer layer 312 is any one of bubble film, corrugated paper, and honeycomb paper. In this embodiment, when the buffer layer 312 is used to make the buffer sheet, it does not need to be stretched.

[0124] Compared with the existing production method that must be stretched, the production process is simpler and more convenient.

[0125] Implementation method five:

[0126] The difference between this embodiment and the first embodiment is that this embodiment does not have a buffer layer, and only the first surface 10 and the second surface 20 are made to form the buffer sheet 100 .

[0127] As shown in Figure 10, specifically, step S1: unwinding or feeding the first surface 10 and the second surface 20, a first horizontal glue position P11 is set on the first surface 10 and / or the second surface 20, the first horizontal glue position P11 is perpendicular to the feeding direction and arranged at intervals along the feeding direction, and the interval distances are the same. During the unwinding or feeding of the first surface 10 or the second surface 20, rolling glue is applied to apply the first horizontal glue to form the first horizontal glue position P11.

[0128] After gluing the first horizontal glue at position P11, the first horizontal glue at position P11 on the first surface 10 corresponds to the first horizontal glue at position P11 on the buffer layer 301 and the second surface 20 after continuous feeding, so that the first surface 10, the buffer layer 301 and the second surface 20 are fixed to each other at position P11 of the first horizontal glue.

[0129] Specifically, at least one glue roller 40 is provided, and each glue roller 40 corresponds to the first surface 10 and / or the second surface 20. The glue rollers 40 are arranged at intervals in the feeding direction. After one glue roller 40 rotates and applies glue to the first surface 10, when the buffer layer 301, which is continuously fed synchronously with the first surface 10, moves to the second glue roller 40, and at the same time, the position P11 of the first horizontal glue applied on the first surface 10 is located below the second glue roller 40, when the second glue roller 40 applies glue to the second surface 20, only when the position P11 of the first horizontal glue applied on the first surface 10 moves below the other glue roller 40, the other glue roller 40 will apply glue to the second surface 20.

[0130] In addition, in this step, the first surface 10 and / or the second surface 20 is provided with a first longitudinal glue position P12, and the first longitudinal glue position P12 is located on the side of the first surface 10 and the second surface 20 facing the buffer layer 301, and the first longitudinal glue position P12 is the two side edges of the first surface 10 and the second surface 20 along the feeding direction.

[0131] In this step, the first surface 10 and the second surface 20 are stacked up and arranged on a workbench and fed continuously and synchronously.

[0132] Step S2: After applying the first horizontal glue and the first vertical glue, the first surface 10 and the second surface 20 are rolled in a stacked state, and the first surface 10 and the second surface 20 are fixed to each other at the position P11 of the first horizontal glue. At the same time, the first surface 10, the buffer layer 301 and the second surface 20 are fixed to each other at the position P12 of the first vertical glue to form a buffer sheet.

[0133] In this embodiment, when the first surface 10 and the second surface 20 are rolled in a stacked state, the first surface 10 and the second surface 20 are pressed only at the first horizontal glue position P11 and the first vertical glue position P12 .

[0134] In this embodiment, after the first surface 10 and the second surface 20 are fixed at the position of the first horizontal glue and the position of the first vertical glue, some air is sealed between the first surface 10 and the second surface 20, and the air can play a buffering and protective role and can keep warm.

[0135] In the above embodiments, it should be noted that the first horizontal adhesive is applied to the first surface 10, the second surface 20, or the buffer layer 312 for bonding to another first surface 10, the second surface 20, or the buffer layer 312 to form the buffer sheet 100. The first horizontal adhesive is arranged at intervals perpendicular to the feed direction; the first longitudinal adhesive is similar, securing the first surface 10, the second surface 20, and the buffer layer 312, but at both sides along the feed direction and continuously along the feed direction.

[0136] The present invention also discloses a method for manufacturing a packaging bag, including at least two implementation methods, specifically:

[0137] Embodiment 6: As shown in Figures 11 to 13, the method for making a packaging bag includes:

[0138] Step D1: Use any one of the methods in Embodiments 1 to 5 above to make two buffer sheets (101, 102).

[0139] The two buffer sheets (101, 102) are respectively the first sheet 101 and the second sheet 102, the first sheet 101 and the second sheet 102 are stacked on each other, and the second sheet 102 is located below the first sheet 101; after the first sheet 101 and the second sheet 102 are stacked, the position P11 of the first horizontal glue of the first sheet 101 is aligned with the position P12 of the second sheet 102. The position P11 of the first horizontal glue and the position P12 of the first vertical glue of the first sheet 101 correspond to the position P12 of the first vertical glue of the second sheet 102; wherein, when the first sheet 101 and the second sheet 102 are produced, the first sheet 101 or the second sheet 102 is provided with a position P21 of the second horizontal glue on at least one side facing each other, and the first sheet 101 or the second sheet 102 is provided with a position P22 of the second vertical glue on at least one side facing each other, and the position P22 of the second vertical glue is only located on one side edge of the first sheet 101 or the second sheet 102 along the feeding direction. The positions of the stacked first sheet 101 and the second sheet 102 make the position P21 of the second horizontal glue opposite to the position P11 of the first horizontal glue, and the position P22 of the second vertical glue opposite to the position P12 of the first vertical glue on one side.

[0140] Step D2: The stacked first sheet 101 and second sheet 102 are fed synchronously and rolled in the stacked state so that the first sheet 101 and second sheet 102 are fixed to each other at the second transverse glue position P21 and the second longitudinal glue position P22, thereby forming a packaging bag 200 with fixed sides.

[0141] The widths of the first sheet 101 and the second sheet 102 along the feeding direction are the same. When the first sheet 101 and the second sheet 102 are rolled in a stacked state, only the second horizontal glue position P21 and the second vertical glue position P22 on the first sheet 101 and the second sheet 102 are pressed.

[0142] In this embodiment, the first sheet 101 and the second sheet 102 are pressed together only at the second longitudinal glue position P22, and the second longitudinal glue position P22 is only set on one side edge of the first sheet 101 or the second sheet 102 along the feeding direction, and the second longitudinal glue position P22 is not set on the other side edge along the feeding direction. When the first sheet 101 and the second sheet 102 are pressed and fixed, a structure similar to the packaging bag 200 is formed at the two adjacent second transverse glue positions P21, that is, the second longitudinal glue position P22 along the feeding direction is fixed, and the other side edge relative to the second longitudinal glue position P22 is not fixed, forming an opening M between the first sheet 101 and the second sheet 102; the two adjacent transverse glue positions P11 are fixed to each other, serving as the two side edges of the opening M, forming a structure with three fixed sides and one open side M as a whole.

[0143] 14 and 15 , the method for manufacturing the packaging bag 200 of the present invention further includes:

[0144] Step D3: Continuously unwinding the cover paper 300 roll, and applying a third longitudinal glue stick to the edge of the cover paper 300 along the feeding direction. The third longitudinal glue stick positions P3 are continuously applied along the feeding direction. The third longitudinal glue stick positions P3 are located on the side of the cover paper 300 facing the first sheet 101. As the cover paper 300 and the second sheet 102 are being fed simultaneously, the third longitudinal glue stick position P3 is applied to the edge of the second sheet 102 opposite to the second longitudinal glue stick position P22, i.e., the edge on the side of the opening M, to form the cover 21.

[0145] Step D4: The pressed and fixed first sheet 101 and second sheet 102 and the pasted cover 21 are cut by rolling at the position P11 of the first horizontal glue or the position P21 of the second horizontal glue to form a packaging bag 200.

[0146] Step D5: When continuously unwinding the cover paper 300, a fourth longitudinal glue is provided on the cover paper 300 toward the middle of the second sheet 102, and the fourth longitudinal glue position P4 is provided continuously along the feeding direction;

[0147] Step D6: While continuously unwinding the cover paper 300, the release paper roll is continuously unwound simultaneously, and the release paper 400 is pasted on the fourth longitudinal glue position P4. The first sheet 101, the second sheet 102, the cover 21 and the release paper 400 on the cover 21 that are pressed and fixed are cut by rolling cutting to form the packaging bag 200.

[0148] In this embodiment, the cover paper 300 is affixed to the outermost surface of the second sheet 102 facing away from the first sheet 101. When the cut packaging bag 200 is used, the cover 21 is folded toward the first sheet 101, and the release paper 400 is removed. The fourth longitudinal adhesive tape P4 is then affixed to the first sheet 101, thereby sealing the opening M formed between the first and second sheets 101, 102, and forming a closed packaging bag 200. In this embodiment, it should be noted that the second horizontal adhesive tape is applied to the first or second sheet 101, 102, for bonding to another first or second sheet 101, 102 to form the packaging bag 200. The second horizontal adhesive tape is applied at intervals perpendicular to the feeding direction. The second longitudinal adhesive tape is similarly applied, securing the first and second sheets 101, 102, but only on one side along the feeding direction, leaving a reserved opening on the other side. The finished packaging bag 200 forms the opening M of the packaging bag. Furthermore, the second longitudinal adhesive tape is applied continuously as the packaging bag 200 is fed.

[0149] Implementation method seven:

[0150] As shown in FIG16 , the difference between this embodiment and the sixth embodiment is that the covering paper 300 and the release paper 400 are attached to the second sheet 102 and the manufacturing method is different.

[0151] Specifically, step D7 is provided after step D4 of implementation mode four. Step D7: the covering paper 300 and the release paper 400 are unwound synchronously and continuously, and when the release paper 400 is unwound continuously, a fifth longitudinal glue is provided on the side of the release paper 400 facing the second sheet 102, and the position P5 of the fifth longitudinal glue is continuously provided along the feeding direction; during the unwinding process, the position P5 of the fifth longitudinal glue is pasted on the covering paper 300 in the direction of the covering paper 300; the first sheet, the second sheet 102, the covering and the release paper 400 on the covering are pressed and fixed by rolling cutting to form a packaging bag 200.

[0152] Implementation method eight:

[0153] 17 to 19 , the present invention also discloses another method for making a packaging bag, wherein the packaging bag making method includes:

[0154] Step A1: Two buffer sheets (101, 102) are prepared by any one of the methods of Embodiments 1 to 5. The two buffer sheets (101, 102) are respectively a first sheet 101 and a second sheet 102, with the second sheet 102 located below the first sheet 101; the width of the first sheet 101 perpendicular to the feeding direction is smaller than the width of the second sheet 102 perpendicular to the feeding direction, and the width of the second sheet 102 extends beyond the first sheet 101 on both sides to form a first edge E1 and a second edge E2, and the first sheet 101 and the second sheet 102 are stacked on each other and fed continuously;

[0155] After the first sheet 101 and the second sheet 102 are stacked, the position P11 of the first horizontal glue of the first sheet 101 corresponds to the position P11 of the first horizontal glue of the second sheet 102, and the position P12 of the first longitudinal glue of the second sheet 102 is located outside the position P12 of the first longitudinal glue of the first sheet 101. When the first sheet 101 and the second sheet 102 are manufactured, the first sheet 101 or the second sheet 102 is provided with second horizontal glue positions P21 on at least one side facing each other. The second horizontal glue positions P21 are perpendicular to the feeding direction and are arranged at equal intervals. The second longitudinal glue positions P22 are provided on the side of the second sheet 102 facing the first sheet 101. The second longitudinal glue positions P22 are located only on the first edge E1 or the second edge E2 of the second sheet 102 along the feeding direction. The stacked first sheet 101 and the second sheet 102 are positioned so that the second horizontal glue position P21 is opposite to the first horizontal glue position P11.

[0156] Step A2: The stacked first sheet 101 and the second sheet 102 are synchronously fed and rolled in a stacked state so that the first sheet 101 and the second sheet 102 are fixed to each other at the second horizontal glue position P21;

[0157] Step A3: The stacked first sheet 101 and the second sheet 102 are fed synchronously in a stacked state, and the first edge E1 or the second edge E2 of the second sheet 102 at the position P22 with the second longitudinal glue is folded toward one side of the first sheet 101, and the first edge E1 or the second edge E2 at the position P22 with the second longitudinal glue is rolled after folding, so that the first sheet 101 and the second sheet 102 are fixed to each other at the position P22 of the second longitudinal glue, thereby forming a packaging bag.

[0158] Furthermore, the second longitudinal glue is provided at the first edge E1. The width of the second edge E2 is greater than that of the first edge E1. The first edge E1 is folded and fixed to the first sheet 101 to form the bottom of the packaging bag. The second edge E2 forms the cover 300.

[0159] Compared with the fourth embodiment, this embodiment forms the bottom of the packaging bag by folding the first edge E1 or the second edge E2 to form the bottom of the packaging bag at the position of the first sheet 101 and the second sheet 102 close to the second longitudinal glue position P22, instead of directly fixing the first sheet 101 and the second sheet 102 on the bottom of the packaging bag. This enables the packaging bag to have a larger loading depth and to accommodate larger items.

[0160] As shown in FIG19 , in this embodiment, the packaging bag manufacturing method further includes:

[0161] Step A4: Continuously unwind the release paper 400, and set a fifth longitudinal glue P5 on the side of the release paper 400 facing the second sheet 102 during unwinding, with the position of the fifth longitudinal glue P5 continuously set along the feeding direction; during the unwinding process, the position of the fifth longitudinal glue P5 is pasted on the second edge E2 toward the second sheet 102; the first sheet 101, the second sheet 102 and the release paper 400 that are pressed and fixed are cut by rolling cutting to form a packaging bag.

[0162] In the present invention, the packaging bags manufactured by the methods of the fourth to sixth embodiments do not require folding of the strip-shaped buffer sheet during manufacturing, compared with the prior art, which is conducive to manufacturing large-sized packaging bags.

[0163] Moreover, the bottom of the produced packaging bags are all fixed structures after gluing, and the packaging strength is strong.

[0164] The present invention also discloses a buffer sheet manufacturing module 500 , wherein the buffer sheet manufacturing module 500 is used to manufacture the buffer sheet 100 .

[0165] The buffer sheet production module has multiple implementation methods. The specific implementation methods are as follows:

[0166] Implementation method nine:

[0167] 20 , the buffer sheet manufacturing module 500 includes a first unwinding unit 51 , a second unwinding unit 52 , a third unwinding unit 53 , a paper pressing unit 54 and a pulling roller 55 .

[0168] The first unwinding unit 51 is arranged on the machine table 50, and is used to unwind the first surface 10, and to feed the first surface 10 continuously along the length direction of the machine table 50; the third unwinding unit 53 is arranged on the machine table 50, and is used to unwind the die-cut paper 31; the pulling roller 55 is arranged on the machine table 50, and is used to stretch the die-cut paper 31 to form a buffer layer 301, and continuously feed the buffer layer 301, so that the buffer layer 301 is located below the first surface 10, and is continuously fed synchronously with the first surface 10, wherein the feeding speed of the pulling roller 55 is greater than the unwinding speed of the third unwinding unit 53; the second unwinding unit 52 is arranged on the machine table 50, and is used to unwind the second surface 20, and to feed the second surface 20 continuously synchronously with the buffer layer 301 along the length direction of the machine table 50, and the second surface 20 is located below the buffer layer 301.

[0169] Among them, the third surface 30 forms a plurality of arranged slits 301 after die-cutting or cutting, and the slits 301 have multiple rows. The multiple slits 301 in the same row are arranged at intervals, and the slits 301 in adjacent rows are staggered with each other, thus forming a die-cut paper 31. When the die-cut paper 31 is applied with an external force perpendicular to the direction of the slits 301, the slits 301 are twisted and deformed into the shape of a three-dimensional opening 312. After all the slits 301 in multiple rows are twisted and deformed into the shape of a three-dimensional opening 312, a buffer layer 301 is formed. The buffer layer 301 has a grid structure. At this time, the buffer layer 301 expands in the thickness direction compared to the third surface 30, and can play a buffering and protective role.

[0170] In this embodiment, there is only one third unwinding unit 53 and one drawing roller 55 , and the buffer layer 301 formed by stretching the drawing roller 55 is also only one layer.

[0171] Glue is applied to the first and second surfaces 10, 20 at intervals perpendicular to the feeding direction, forming first horizontal glue positions P11. Glue is applied continuously along both edges of the first and second surfaces 10, 20 in the feeding direction, forming first vertical glue positions P12. The first horizontal glue positions P11 on the first surface 10 and the first horizontal glue positions P11 on the second surface 20 are opposite to each other during the feeding process, and the first vertical glue positions P12 on the first surface 10 and the first vertical glue positions P12 on the second surface 20 are opposite to each other during the feeding process.

[0172] The first horizontal glue may be applied to only one layer of the buffer layer 301 to form the first horizontal glue position P11, and / or the first vertical glue may be applied to form the first vertical glue position P12; the first horizontal glue and the first vertical glue may not be applied to only one layer of the buffer layer 301. When the first horizontal glue and the first vertical glue are applied to the buffer layer 301, the first horizontal glue position P11 on the buffer layer 301 corresponds to the first horizontal glue position P11 on the first surface 10 and / or the second surface 20, and the first vertical glue position P12 on the buffer layer 301 corresponds to the first vertical glue position P12 on the first surface 10 and / or the second surface 20.

[0173] The paper pressing unit 54 is used to roll and clamp the first surface 10, the second surface 20, and the buffer layer 301 provided with the first horizontal glue position P11 and the first longitudinal glue position P12, and feed them synchronously to press and fix the first surface 10, the buffer layer 301, and the second surface 20 at the first horizontal glue position P11 and the first longitudinal glue position P12, thereby forming a buffer sheet.

[0174] In this embodiment, the buffer sheet material, with the exception of the first horizontal glue position P11 and the first vertical glue position P12, comprises a buffer layer 301 in a three-dimensional grid structure sandwiched between the first surface 10 and the second surface 20, thereby providing cushioning protection. The buffer layer 301 sandwiched between the first surface 10 and the second surface 20 is enclosed within the first horizontal glue position P11 and the first vertical glue position P12 on the first surface 10 and / or the second surface 20, forming a closed space that provides thermal insulation.

[0175] In this embodiment, the simplest method is to set the position P11 of the first horizontal glue and the position P12 of the first vertical glue only on the first surface 10 or the second surface 20. When the first surface 10, the second surface 20 and the buffer layer 301 are stacked and pressed, since the buffer layer 301 is a three-dimensional grid structure with grid openings 312, the first horizontal glue and the first vertical glue on the first surface 10 or the second surface 20 can still be fixed to the buffer layer 301 and to the first surface 10 or the second surface 20 where the first horizontal glue and the first vertical glue are not set through the grid openings 312 of the buffer layer 301.

[0176] In this embodiment, the most secure gluing method is to provide first horizontal glue positions P11 and first vertical glue positions P12 on the first surface 10, the second surface 20 and the buffer layer 301, and the respective first horizontal glue positions P11 are opposite to each other, and the respective first vertical glue positions P12 are opposite to each other.

[0177] In the present invention, the positions P11 and P12 of the first horizontal glues provided on the first surface 10 , the second surface 20 and the buffer layer 301 only need to be able to fix the first surface 10 , the second surface 20 and the buffer layer 301 to each other.

[0178] As shown in Figure 20, the paper pressing unit 54 includes: at least one set of paper pressing rollers 541, and the paper pressing rollers 541 are provided with paper pressing bosses 542. The paper pressing bosses 542 are perpendicular to the feeding direction of the machine 50 and extend from one end of the paper pressing roller 541 toward the other end. When the paper pressing roller 541 rotates, the paper pressing bosses 542 are used to press and fix the first surface 10, the buffer layer 301, and the second surface 20 only at the position P11 of the first horizontal glue, so that the buffer layer 301 between two adjacent first horizontal glue positions P11 remains in a three-dimensional grid structure.

[0179] As shown in Figures 21 and 22, the paper pressing unit 54 also includes: at least one group of rotating units 542, each group of rotating units 542 includes two rotating wheels 5421, the two rotating wheels 5421 are arranged in parallel and opposite to each other, one rotating wheel 5421 is located above the edge of one side of the first surface 10 and / or the second surface 20 along the feeding direction, and the other rotating wheel 5421 is located above the edge of the other side of the first surface 10 and / or the second surface 20 along the feeding direction; during the feeding process of the first surface 10, the second surface 20 and the buffer layer 301, the rotating wheels 5421 are pressed against both sides of the first surface 10 or the second surface 20, and are opposite to the position P12 of the first longitudinal glue, so as to fix the buffer layer 301, the first surface 10 and the second surface 20 at the position P12 of the first longitudinal glue during the feeding process.

[0180] As shown in FIG20 , the manufacturing module 500 further includes an oven 56 , which is disposed on the machine 50 and is used to heat the buffer sheet 100 so that the first surface 10 , the second surface 20 and the buffer layer 301 are fixed to each other at the first horizontal glue position P11 and the first vertical glue position P12 .

[0181] The heated first surface 10 , the second surface 20 and / or the buffer layer 301 can be more firmly fixed to each other at the first horizontal glue position P11 and the first vertical glue position P12 .

[0182] Implementation method ten:

[0183] The difference between this embodiment and the ninth embodiment is that the buffer sheet does not have a buffer layer, but is formed by simply fixing the first surface and the second surface.

[0184] As shown in FIG23 , specifically, the buffer sheet manufacturing module 500 includes:

[0185] A first unwinding unit 51 is provided on the machine platform and is used to unwind the first surface 10 and continuously feed the first surface 51 along the length direction of the machine platform;

[0186] A second unwinding unit 52 is provided on the machine platform, and is used to unwind the second surface 20 and feed the second surface 20 synchronously and continuously with the first surface 10 along the length direction of the machine platform, with the second surface 20 being located below the first surface 10; first horizontal glue is applied at intervals to the first surface 10 and / or the second surface 20 on a side facing the other first surface 10 or second surface 20, perpendicular to the feeding direction; first longitudinal glue is applied continuously to the first surface 10 and / or the second surface 20 on a side facing the other first surface 10 or second surface 20, along both side edges in the feeding direction; the position of the first horizontal glue on the first surface 10 and / or the second surface 20 is opposite to the position of the first horizontal glue on the second surface 20 during the feeding process, and the position of the first longitudinal glue on the first surface 10 and the position of the first longitudinal glue on the second surface are opposite to each other during the feeding process;

[0187] The paper pressing unit 54 is used to roll, clamp and press the position of the first horizontal glue and the position of the first longitudinal glue set on the first surface 10 and / or the second surface 20, so as to press and fix the first surface 10 and the second surface 20 at the position of the first horizontal glue and the position of the first longitudinal glue, thereby forming the buffer sheet 100, wherein gas is sealed between the first surface 10 and the second surface 20 so that the buffer sheet has a buffering effect.

[0188] Implementation method eleven:

[0189] As shown in Figure 24, in this embodiment, the production module 500 is used to manufacture a buffer sheet 100 having no less than two buffer layers 301. The difference between this embodiment and embodiment nine is that there are two third unwinding units 53 and two drawing rollers 55, and the buffer layer 301 formed by stretching the drawing rollers 55 also has two layers. The two layers of the buffer layer 301 are located between the first surface 10 and the second surface 20 during the continuous and synchronous unwinding process. When the position P11 of the first horizontal glue and the position P12 of the first vertical glue are provided on the buffer layer 301, the position P11 of the first horizontal glue on the two layers of the buffer layer 301 corresponds to the position P11 of the first horizontal glue on the first surface 10 and the second surface 20, and the position P12 of the first vertical glue on the two layers of the buffer layer 301 also corresponds to the position P12 of the first vertical glue on the first surface 10 and the second surface 20.

[0190] One of the drawing rollers 55 places the stretched buffer layer 301 above or below the stretched buffer layer 301 of the other drawing roller 55 and feeds them synchronously along the feeding direction.

[0191] In this embodiment, the first horizontal glue position P11 and the first vertical glue position P12 may not be set on the two layers of the buffer layer 301, as long as the first surface 10, the second surface 20 and the buffer layer 301 can be fixed at the edges on both sides of the feeding direction and the intervals perpendicular to the feeding direction.

[0192] In this embodiment, similarly, the buffer layer 301 can be three layers or more. In this case, it is only necessary to add the third unwinding unit 53 and the pulling roller 55, and ensure that the stretched multi-layer buffer layers 301 are stacked on each other and located between the first surface 10 and the second surface 20 and delivered synchronously.

[0193] It should be noted that in the seventh and eighth embodiments of the present invention, the first horizontal glue position P11 and the first longitudinal glue position P12 on the first surface 10, the buffer layer 301 and the second surface 20 are all set before unwinding.

[0194] The production module of the present invention also includes the following embodiments:

[0195] Implementation Method Twelve:

[0196] The difference between this embodiment and embodiment nine or embodiment eleven is that the first unwinding unit 51 unwinds the first surface 10 where the first horizontal glue position P11 and the first longitudinal glue position P12 are not set, the second unwinding unit 52 unwinds the second surface 20 where the first horizontal glue position P11 and the first longitudinal glue position P12 are not set, and the third unwinding unit 53 unwinds the third surface 30 where the first horizontal glue position P11 and the first longitudinal glue position P12 are not set, rather than the die-cut paper 31.

[0197] In this embodiment, the production module 500 applies the first horizontal glue and the first vertical glue to the first surface 10 and the second surface 20 during the feeding process, thereby forming the position P11 of the first horizontal glue and the position P12 of the first vertical glue, and in the process of unwinding the third surface 30, the third surface 30 is cut to form a die-cut paper 31, and the die-cut paper 31 is stretched to form a buffer layer 301, and the buffer layer 301 is fed synchronously and continuously with the first surface 10 and the second surface 20.

[0198] Specifically, as shown in Figures 25 to 27, the production module 500 also includes at least one cutting roller 57, which is arranged between the third unwinding unit 53 and the pulling roller 55. The cutting roller 57 cuts the third surface 30 into die-cut paper 31 during the continuous feeding process. The cutting roller 57 is provided with rows of cutting knives 571, which extend from one end of the cutting roller 57 to the other end and are located on the outer peripheral surface of the cutting roller 57. The cutting knives 571 in the same row have spaced protrusions 5711, and the protrusions 5711 die-cut the die-cut paper 31 to form a slit 310. The protrusions 5711 in two adjacent rows of the cutting knives 571 are staggered.

[0199] The process of feeding the buffer layer 301 is that the third surface 30 is first unwound by the third unwinding unit 53, and then passes through the cutting roller 57. The cutting roller 57 cuts the third surface 30 to form a die-cut paper 31. The die-cut paper 31 is stretched by the pulling roller 55 to form the buffer layer 301. The pulling roller 55 feeds the buffer to the machine table 54 and is located below the first surface 10.

[0200] Among them, the production module 500 also includes: a first gluing structure 501, a second gluing structure 502 and a third gluing structure 503 respectively arranged on the machine 54, the first gluing structure 501 is used to roll and clamp the first surface 10, and in the process of continuous feeding, apply the first horizontal glue in the vertical feeding direction to the first surface 10 at intervals, and the first gluing structure 501 is arranged at the front end of the pulling roller 55; the second gluing structure 502 is used to roll and clamp the second surface 20, and in the process of continuous feeding, apply the first horizontal glue in the vertical feeding direction to the second surface 20 at intervals, and the second gluing structure 502 is arranged at the front end of the laminating unit 54; the third gluing structure 503 is used to feed the buffer layer 301, and in the process of continuous feeding, apply the first horizontal glue in the vertical feeding direction to each layer of the buffer layer 301 at intervals to form the position P11 of the first horizontal glue, and the third gluing structure 503 is arranged at the rear end of the pulling roller 55.

[0201] Refer to Figure 27, in which the first gluing structure 501, the second gluing structure 502 and the third gluing structure 503 are the same and all include a gluing roller 541. At least one gluing position 542 is provided on the outer peripheral surface of the gluing roller 541. The gluing position 542 is perpendicular to the feeding direction of the machine 54 and extends from one end of the gluing roller 541 toward the other end. When the gluing roller 541 rotates, glue is applied to the first surface 10 and / or the second surface 20, and the buffer layer 301 respectively only when the gluing position contacts the first surface 10, the second surface 20 or the buffer layer 301.

[0202] Among them, the first glue applying structure 501, the second glue applying structure 502 and the third glue applying structure 503 also include a glue tank 511, a rotating glue taking roller 512 and a scraper 513, the glue tank 511 contains condensed glue, and a part of the circumference of the rotating glue taking roller 512 is immersed in the glue, wherein the rotation speed of the rotating glue taking roller 512 is not less than the rotation speed of the glue applying roller 541, and the glue applying roller 541 rotates synchronously and continuously, and the rotation rate is the same as the feeding rate. And when the glue applying roller 541 rotates, the glue rolling position 542 on the glue applying roller 541 contacts the circumference of the rotating glue taking roller 512, and separates from the outer circumference of the glue taking roller 512 after the contact, and the glue on the circumference of the glue taking roller 512 is coated on the surface of the glue rolling position 542 when contacting the circumference of the rotating glue taking roller 512; when the glue applying roller 541 continues to rotate, the glue rolling position 542 rotates to the surface of the first surface 10, the second surface 20 or the surface of the buffer layer 301 and applies fixed glue to the first surface 10, the second surface 20 or the surface of the buffer layer 301, forming the position P11 of the first horizontal glue.

[0203] At least one tip of the scraper 513 is located near the circumference of the rotating glue-taking roller 512, and the scraper 513 is used to scrape off excess glue on the rotating glue-taking roller 512, thereby forming a glue layer. The thickness of the glue layer can be adjusted by adjusting the distance between the scraper 513 and the rotating glue-taking roller 512.

[0204] As shown in Figure 25, in this embodiment, the manufacturing module 500 also includes a fourth gluing structure 504, which is used to continuously apply fixing glue to the first surface 10 and / or the second surface 20, or the two side edges of the buffer layer 301 along the feeding direction to form the first longitudinal glue position P12.

[0205] In this embodiment, there may be multiple fourth gluing structures 504, which are set according to the position P12 of the first longitudinal glue to be set on the first surface 10, the second surface 20 and / or the buffer layer 301. For example, two fourth gluing structures 504 are set in Figure 22, and the fourth gluing structures 504 are glued by spraying or scraping. One of the two fourth gluing structures 504 is set at the rear end of the first unwinding unit 51, and is used to apply the first horizontal glue to the side of the first surface 10 facing the buffer layer 301; the other of the two fourth gluing structures 504 is set at the rear end of the second unwinding unit 52, and is used to apply the first horizontal glue to the side of the second surface 20 facing the buffer layer 301.

[0206] In this embodiment, a fourth gluing structure 504 may be added. For example, a fourth gluing structure 504 may be added. The added fourth gluing structure 504 is located at the rear end of the pulling roller 55 to apply the first horizontal glue to the side of the buffer layer 301 facing the first surface 10 .

[0207] In this embodiment, the buffer layer 301 can also be multi-layered. When the buffer layer 301 is multi-layered, a third unwinding unit 53 and a cutting roller 57 can be added. When unwinding the multi-layered buffer layer 301, it is also necessary to ensure that the multi-layered buffer layer 301 is located between the first surface 10 and the second surface 20 and is continuously fed synchronously with the first surface 10 and the second surface 20.

[0208] Compared with the seventh and eighth embodiments, the first surface 10, the second surface 20 and the third surface 30 of this embodiment are made of the same material, so manpower and material resources are saved when loading the materials, and there is no need to purchase and store them separately.

[0209] In addition, compared with the ninth and eleventh embodiments, the gluing actions on the first side 10, the die-cut paper 31 formed by stretching the third side 30, and the second side 20 are performed during the process of their respective unwinding and feeding, and there is no need to load the first side 10, the second side 20, and the die-cut paper 31 that have been glued in advance. If the first side 10, the second side 20, and the die-cut paper 31 are glued in advance, the first side 10, the second side 20, and the die-cut paper 31 also need to be rolled up, stored, etc., and then unwound through the first unwinding unit 51, the second unwinding unit 52, and the third unwinding unit 53, the process is more complicated and the cost is increased. This embodiment is conducive to reducing costs.

[0210] In addition, the process of cutting the third side 30 into the die-cut paper 31 is also completed during the feeding process, which is more convenient and simple.

[0211] For the convenience of subsequent description, we define the buffer sheets produced by the ninth embodiment, the eleventh embodiment, and the twelfth embodiment as the buffer sheets of the first structure.

[0212] Implementation Method Thirteen:

[0213] The difference between the buffer sheet production module in this embodiment and that in embodiments nine to twelve is that, when producing the buffer sheet, a second horizontal glue position P21 and / or a second vertical glue position P22 are added to an outer side of the first surface 10 of the buffer sheet facing away from the second surface 20 or an outer side surface of the second surface 20 facing away from the first surface 10, as shown in Figure 29.

[0214] In which, when the buffer sheet in this embodiment is manufactured, a fixing glue perpendicular to the feeding direction is applied to an outer side surface of the second surface 20 or the first surface 10 facing away from the buffer layer to form a second horizontal glue position P21, and a fixing glue is continuously applied along a side edge in the feeding direction to form a second longitudinal glue position P22; the second horizontal glue position P21 corresponds to the first horizontal glue position P11, and the second longitudinal glue position P22 corresponds to one of the first longitudinal glue positions P12.

[0215] In this embodiment, the position P21 of the second horizontal glue and the position P22 of the second longitudinal glue on the outer side of the first surface 10 or the second surface 20 facing away from the buffer layer can be set on the first surface 10 or the second surface 20 before unwinding, or the glue can be applied during the unwinding process of the first surface 10 or the second surface 20.

[0216] When the first surface 10 or the second surface 20 is glued on the outer side of the first surface 10 or the second surface 20 facing away from the buffer layer during the unwinding or feeding process, the first glue-applying structure 501 or the second glue-applying structure 502 adopts double-sided glue application. As shown in Figures 28 and 29, a rotating glue-taking roller 512, a glue-applying roller 541, and a glue tank 511 are additionally provided on the outer side of the first surface 10 or the second surface 20 facing away from the buffer layer 301. A portion of the circumference of each of the rotating glue-applying rollers 512 is immersed in glue, and the two glue-applying rollers 541 rotate synchronously and continuously at the same rotation rate as the feeding rate. One of the glue-applying rollers 541 applies fixed glue to one side of the first surface 10 or the second surface 20, forming a second horizontal glue position P21, while the other glue-applying roller 541 applies fixed glue to the other side of the first surface 10 or the second surface 20, also forming a second horizontal glue position P21.

[0217] Of course, in this embodiment, two first gluing structures 501 or second gluing structures 502 can also be set. The two first gluing structures 501 and the second gluing structures 502 apply fixing glue to the two side edges of the first surface 10 or the second surface 20, and there is a second horizontal glue position P21 on both surfaces of the first surface 10 or the second surface 20.

[0218] As shown in Figure 29, in this embodiment, when the first surface 10 or the second surface 20 is glued on the outer side of the first surface 10 or the second surface 20 away from the buffer layer to form a second longitudinal glue during the unwinding or feeding process, a fourth glue structure 501 can be added on the side of the outer side of the first surface 10 or the second surface 20 away from the buffer layer, that is, a fourth glue structure 504 is provided at the upper and lower positions on both sides of the first surface 10 or the second surface 20, and the fourth glue structure 504 forms the second longitudinal glue position P22 on the two sides of the first surface 10 or the second surface 20 along the feeding direction by spraying or coating glue.

[0219] For the convenience of subsequent description, we define the buffer sheet produced by the thirteenth embodiment as a buffer sheet of the second structure.

[0220] At this point, the applicant also needs to explain that in the production process of the buffer sheet 100 of the first structure and the buffer sheet 100 of the second structure, it is preferred that the width of the buffer layer 301 perpendicular to the feeding direction is smaller than the width of the first surface 10 and / or the second surface 20 perpendicular to the feeding direction, and the widths of the first surface 10 and the second surface 20 are the same, and both ends of the first surface 10 and the second surface 20 in the width direction extend out of the buffer layer. In this case, after applying glue to the side of the first surface 10 and the second surface 20 facing the buffer layer to form the first longitudinal glue position P12, the first longitudinal glue position P12 on the first surface 10 or the second surface 20 can be directly fixed to the other first surface 10 or the second surface 20, and there is no need to set the first longitudinal glue position P12 on the buffer layer, which can minimize the steps and processes of gluing and improve production efficiency.

[0221] The present invention also discloses a packaging bag making device 600, wherein the packaging bag making device 600 includes multiple embodiments, as follows:

[0222] Implementation method 14:

[0223] As shown in Figures 30 and 31 , and in combination with Figure 12 , the packaging bag making equipment 600 includes: two buffer sheet making modules 500 , a fifth gluing structure 61 , a bag-forming gluing structure 62 , at least one set of pressing rollers 63 and a rolling and cutting module 64 .

[0224] Among them, the two buffer sheet production modules 500 are used to produce two buffer sheets 100 of the first structure, as shown in Figure 1, that is, the second horizontal glue P21 and the second longitudinal glue P22 are not set on the outer surfaces of the first surface 10 and the second surface 20 of the two buffer sheets 100 away from the buffer layer 301.

[0225] One buffer sheet production module 500 is used to produce a buffer sheet for the first sheet 101, and another buffer sheet production module 500 is used to produce another buffer sheet for the second sheet 102. The first sheet 101 is located above the second sheet 102 and overlaps with the second sheet 102 up and down, and is fed synchronously and continuously.

[0226] The fifth gluing structure 61 rolls and applies glue to the side of the first sheet 101 facing the second surface of the second sheet 102, so that fixed glue is applied at intervals perpendicular to the feeding direction on the second surface of the first sheet 101, forming second horizontal glue positions P21. Alternatively, the fifth gluing structure 61 rolls and applies glue to the side of the second sheet 102 facing the first surface of the first sheet 101, so that fixed glue is applied at intervals perpendicular to the feeding direction on the first surface of the second sheet 102, forming second horizontal glue positions P21. The second horizontal glue positions P21 are opposite to the first horizontal glue positions P11 in the first sheet 101 or the second sheet 102. The second vertical glue positions P22 are opposite to the first vertical glue positions P12 in either the first sheet 101 or the second sheet 102.

[0227] Among them, the bag-forming glue-applying structure 62 is used to continuously apply glue to the side of the first surface or the second surface of the first sheet 101 facing the second sheet 102 and / or the side of the second sheet 102 facing the first surface or the second surface of the first sheet 101. The glue-applying position of the bag-forming glue-applying structure 62 is one side edge of the first sheet 101 or the second sheet 102 along the length direction. After the glue-applying structure 62 applies glue, the second longitudinal glue position P22 is formed. The position P22 of the second longitudinal glue for continuous gluing is continuous along the length direction.

[0228] The pressing roller 63 is arranged at the rear ends of the two buffer sheet production modules 500 and the bagging gluing structure 62. The pressing roller 63 clamps the first sheet 101 and the second sheet 102, and rolls the second longitudinal glue position P22 after gluing by the bagging gluing structure 62 and the second transverse glue position P21 in the vertical feeding direction on the first or second surface opposite to each other on the first sheet 101 or the second sheet 102, thereby fixing the first sheet 101 and the second sheet 102, wherein the structure of the pressing roller 63 is the same or similar to the paper pressing unit structure in the buffer sheet production module 500.

[0229] As shown in Figures 30 and 31, the rolling and cutting module 64 is arranged at the rear end of the pressing roller 63, and is used to clamp the first and second sheets 101 and 102 after being pressed and fixed, and cut the fixed first and second sheets 101 and 102 at the position P21 of the second horizontal glue during the rolling process, thereby forming multiple packaging bags during the continuous feeding process.

[0230] The rolling module 64 includes a rolling wheel 641 and a rolling cutter 642 arranged on the circumference of the rolling wheel and perpendicular to the end surface of the rolling wheel; when the rolling wheel 641 rotates until the rolling cutter 642 contacts the first sheet 101 and the second sheet 102, as the rolling wheel 641 rotates, the rolling cutter 642 cuts the first horizontal glue position P11 and / or the second horizontal glue position P21 of the first sheet 101 and the second sheet 102 perpendicular to the feeding direction, thereby forming a packaging bag.

[0231] As shown in FIG32 and in combination with FIG14 to FIG16 , the packaging bag making equipment 600 further includes a cover paper module 65 .

[0232] The covering paper module 65 is arranged at the front end of the pressing roller 63. The covering paper module 65 is used to unwind the covering paper and continuously apply glue on the edge of the covering paper along the feeding direction to form a third longitudinal glue position. The third longitudinal glue position is located on the side of the covering paper facing the first sheet 101. In the process of synchronously feeding the covering paper with the first sheet 101 or the second sheet 102, the third longitudinal glue position is pasted on the side of the second sheet 102 away from the second longitudinal glue position P22 to form a cover.

[0233] The packaging bag making equipment 600 further includes a release paper module 66 .

[0234] The release paper module 66 is arranged at the front end of the pressing roller 63. During the continuous unwinding of the cover paper, the release paper module 66 continuously applies glue to the cover paper toward the middle position of the first sheet 101 to form a fourth longitudinal glue position. The fourth longitudinal glue position is continuous along the feeding direction, and the release paper roll is continuously unwound synchronously, and the release paper is pasted on the fourth longitudinal glue position of the cover paper.

[0235] The rolling cutting module 64 cuts the cover paper and the release paper simultaneously when cutting the fixed glue position perpendicular to the feeding direction, thereby forming a packaging bag with a cover.

[0236] Implementation method 14:

[0237] As shown in FIG33 , the difference between this embodiment and the thirteenth embodiment is that two buffer sheet production modules 500 are used to produce at least one buffer sheet 102 of the second structure, and the packaging bag production equipment is not provided with the fifth gluing structure and the bag-forming gluing structure.

[0238] Among them, at least one of the two buffer sheets is a buffer sheet 102 of the second structure. Since the second horizontal glue position P21 and the second longitudinal glue position P22 have been pre-set on an outer surface of the buffer sheet 102 of the second structure, the buffer sheet 102 of the second structure and the other buffer sheet 101 can be directly rolled and pressed to directly fix the buffer sheet 102 of the second structure and the other buffer sheet 101 to form a packaging bag.

[0239] Specifically, at least one buffer sheet 102 is provided with second horizontal glue positions P21 and second vertical glue positions P22 on the first and second outer surfaces facing away from the buffer layer.

[0240] Implementation method 15:

[0241] As shown in Figure 33, the difference between this embodiment and embodiment thirteen is that the width of the first sheet 101 perpendicular to the feeding direction is smaller than the width of the second sheet 102 perpendicular to the feeding direction, and the width of the second sheet 102 extends beyond the first sheet 101 on both sides to form a first edge E1 and a second edge E2.

[0242] The second longitudinal glue applied by the bag-forming glue-applying structure 62 is located only at the first edge E1 or the second edge E2 of the second sheet 102 along the feeding direction, and the first edge E1 and the second edge E2 extend beyond the first sheet. The first edge E1 or the second edge E2 with the second longitudinal glue is the bottom edge of the bag.

[0243] In this embodiment, the packaging bag making module also includes a bottom turning module 67, which is arranged at the rear end of the bag gluing structure 62 and is used to fold the bottom edge of the bag after the second piece is continuously glued so that the bottom edge of the bag wraps the opposite edge of the first piece.

[0244] As shown in Figures 34 and 35 , the folding module 67 includes a platform segment 671 and a curved surface 672 extending from one edge of the platform segment. This curved surface 672 has a larger entrance a1 at one end and a smaller exit a2 at the other end, parallel to the plane through which the first and second sheets are fed. The direction from entrance a1 toward exit a2 is the feeding direction. After the first and second sheets 101 and 102 are synchronously and continuously fed into entrance a1, the first edge E1 or the second edge E2, where the second longitudinal adhesive is located, is fed onto the curved surface 672 and, under pressure from the curved surface 672, gradually folds.

[0245] In this embodiment, the packaging bag production module further includes a pressing pulley 68, which is used to press the folded bottom edge of the bag to secure it to the first sheet 101. The first edge or the second edge where the second longitudinal glue is not located is the cover, and the width of the cover in the vertical feeding direction is greater than the width of the bottom edge of the bag.

[0246] 19 , the release paper module 66 is arranged at the front end of the pressing roller 63. When unwinding, the release paper module 66 sets a fifth longitudinal glue on the side of the release paper facing the second sheet 102, and the position of the fifth longitudinal glue is continuously set along the feeding direction; during the unwinding process, the position of the fifth longitudinal glue is pasted toward the second sheet on the first edge E1 or the second edge E2 where there is no second longitudinal glue, that is, on the cover; the first sheet 101, the second sheet 102 and the release paper 400 that are pressed and fixed are cut by rolling cutting to form a packaging bag.

Claims

1. A method for producing a buffer sheet, characterized in that: The buffer sheet comprises a first surface and a second surface; the method comprises: Step S1: unwinding or feeding the first surface and the second surface, at least one of the first surface and the second surface is provided with a first horizontal glue and a first vertical glue, the first horizontal glue and the first vertical glue are located on the first surface and / or the second surface and are arranged toward one side of the other first surface or the second surface; the first horizontal glue is perpendicular to the feeding direction and is arranged at intervals along the feeding direction, and the intervals are the same; the first vertical glue is continuously arranged along the two side edges of the feeding direction; the first surface and the second surface are stacked up and down and arranged on the workbench, and are synchronously and continuously fed; Wherein, when the first horizontal glue and the first vertical glue are provided on both the first surface and the second surface, the first horizontal glue on the first surface corresponds to the first horizontal glue on the second surface after continuous feeding, and the first vertical glue on the first surface corresponds to the first vertical glue on the second surface after continuous feeding; Step S2: rolling the first surface and the second surface after the first horizontal glue and the first vertical glue are applied in a stacked state, and fixing the first surface and the second surface to each other at the position of the first horizontal glue, and fixing the first surface and the second surface to each other at the position of the first vertical glue, so as to form a buffer sheet; The buffer sheet has gas sealed between the position of the first horizontal glue and the position of the first vertical glue, so that the buffer sheet has a buffering effect.

2. The method for manufacturing a buffer sheet according to claim 1, wherein the buffer sheet further comprises a buffer layer clamped and fixed between the first surface and the second surface, wherein: When the first surface and the second surface are unrolled in the step S1, at least one layer of the buffer layer is unrolled simultaneously, and the buffer layer is located between the first surface and the second surface; When the first surface and the second surface are rolled in step S2, the first surface, the buffer layer and the second surface are fixed to each other at the position of the first horizontal glue, and at the same time, the first surface, the buffer layer and the second surface, or the first surface and the second surface are fixed to each other at the position of the first longitudinal glue to form a buffer sheet.

3. The method for producing a buffer sheet according to claim 2, characterized in that: A first horizontal glue is provided on at least one side of the buffer layer facing the first side or the second side. During the feeding process, the first horizontal glue on the buffer layer and the first horizontal glue on the first side and / or the second side are opposite to each other, and the first side, the second side and the buffer layer are rolled and fixed at the position of the first horizontal glue.

4. The method for producing a buffer sheet according to claim 3, characterized in that: The buffer layer has a buffering capacity in a direction perpendicular to the workbench, and the buffer layer comprises: any one of a paper three-dimensional grid structure, a bubble film, corrugated paper, and honeycomb paper.

5. The method for producing a buffer sheet according to claim 4, characterized in that: The width of the buffer layer perpendicular to the feeding direction is the same as the width of the first surface and / or the second surface perpendicular to the feeding direction, and at least one side surface of at least one layer of the buffer layer facing the first surface or the second surface is provided with a first longitudinal glue; the first surface, the second surface and the buffer layer are rolled and fixed to each other at the position of the first transverse glue and the position of the first longitudinal glue.

6. The method for producing a buffer sheet according to claim 4, characterized in that: The width of the buffer layer perpendicular to the feeding direction is smaller than the width of the first surface and / or the second surface perpendicular to the feeding direction. The first surface, the second surface and the buffer layer are fixed to each other after rolling at the position of the first transverse glue. The first surface and the second surface are fixed to each other after rolling at the position of the first longitudinal glue to clamp the buffer layer between the first surface and the second surface.

7. The method for producing a buffer sheet according to claim 5 or 6, characterized in that: The first surface, the second surface and the buffer layer are made of paper material, the buffer layer is a three-dimensional grid structure, the buffer layer is formed by the third surface, and the buffer layer is formed by: Step S11: unwinding the third surface, and cutting a plurality of arranged slits on the third surface when the third surface is unwinding, wherein the slits have a plurality of rows, the plurality of slits in the same row are arranged at intervals, and the slits in adjacent rows are staggered with each other, so as to form die-cut paper; Step S12: continuously feeding the die-cut paper, and adjusting the feeding speed at the rear end to be greater than the feeding speed at the front end, so that the die-cut paper is stretched to form the buffer layer. The buffer layer formed is unwound synchronously and continuously with the first surface and the second surface.

8. The method for producing a buffer sheet according to claim 7, wherein: When the first surface, the buffer layer, and the second surface are rolled in a stacked state, only the first transverse rubber and the first longitudinal rubber are pressed.

9. The method for producing a buffer sheet according to claim 2, wherein: During the unwinding or feeding of the first surface, the second surface and the buffer layer, rolling gluing is performed to apply the first transverse glue, and continuous gluing is performed to apply the first longitudinal glue.

10. The method for producing a buffer sheet according to claim 1, wherein: The method comprises: Step S3: The formed buffer sheet is heated while being fed, so that the first surface and the second surface are firmly fixed after being pressed at the position of the first horizontal glue and the position of the first longitudinal glue.

11. The method for producing a buffer sheet according to claim 10, wherein: The method comprises: Step S4: rolling and cutting the buffer sheet at at least two adjacent or spaced positions of the first transverse adhesives to form a buffer unit, wherein the buffer unit is used for wrapping and protecting articles and providing heat insulation.

12. A method for making a packaging bag, characterized in that: The method comprises: Step D1: two buffer sheets are made by the method of claim 1, the two buffer sheets are respectively a first sheet and a second sheet, the first sheet and the second sheet are stacked on each other, and the second sheet is located below the first sheet; after the first sheet and the second sheet are stacked, the position of the first horizontal glue of the first sheet corresponds to the position of the first horizontal glue of the second sheet, and the position of the first vertical glue of the first sheet corresponds to the position of the first vertical glue of the second sheet; wherein, when the first sheet and the second sheet are made, or after the first sheet and the second sheet are made and before being stacked on each other, the first sheet or the second sheet is provided with a position of a second horizontal glue on at least one side facing each other, and the position of a second vertical glue is provided on at least one side facing each other of the first sheet or the second sheet, the position of the second vertical glue is only located on one side edge of the first sheet or the second sheet along the feeding direction, the position of the second horizontal glue is perpendicular to the feeding direction and is arranged at intervals along the feeding direction, and the interval distances are the same; the positions of the stacked first sheet and the second sheet are such that the position of the second horizontal glue is opposite to the position of the first horizontal glue, and the position of the second vertical glue is opposite to the position of the first vertical glue on one side; Step D2: synchronously feeding the stacked first sheet and the second sheet and rolling them in a stacked state, so that the first sheet and the second sheet are fixed to each other at the second transverse glue position and the second longitudinal glue position, thereby forming the packaging bag with fixed two side edges.

13. The method for making a packaging bag according to claim 12, characterized in that: The first sheet and the second sheet have the same width perpendicular to the feeding direction, and the method further comprises: Step D3: continuously unwinding the cover paper roll, and setting a third longitudinal glue on the edge of the cover paper along the feeding direction, the position of the third longitudinal glue is continuously set along the feeding direction, the position of the third longitudinal glue is located on one side of the cover paper facing the first sheet, and in the process of synchronously feeding the cover paper and the second sheet, the position of the third longitudinal glue is glued to the other side edge of the second sheet relative to the position of the second longitudinal glue, so as to form a cover; Step D4: The pressed and fixed first sheet and second sheet and the pasted cover are cut at the position of the first horizontal glue or the position of the second horizontal glue by rolling cutting to form a packaging bag.

14. The method for making a packaging bag according to claim 13, characterized in that: The method further comprises: Step D5: when the cover paper is unrolled continuously, a fourth longitudinal glue is provided on the cover paper toward the middle position of the second sheet, and the position of the fourth longitudinal glue is provided continuously along the feeding direction; Step D6: When continuously unrolling the cover paper, the release paper roll is unrolled synchronously and continuously, and the release paper is pasted on the position of the fourth longitudinal glue, and the first sheet, the second sheet, the cover and the release paper on the cover that are pressed and fixed are cut by rolling cutting to form the packaging bag.

15. The method for making a packaging bag according to claim 13, characterized in that: The method further comprises: Step D7: Unwind the covering paper and the release paper synchronously and continuously, and when continuously unwinding the release paper, set a fifth longitudinal glue on the side of the release paper facing the second sheet, and the position of the fifth longitudinal glue is continuously set along the feeding direction; during the unwinding process, the fifth longitudinal glue is pasted on the covering paper in the direction of the covering paper; the first sheet, the second sheet, the covering, and the release paper on the covering that are pressed and fixed are cut by rolling cutting to form the packaging bag.

16. A method for making a packaging bag, characterized in that: The method comprises: Step A1: manufacturing two buffer sheets by the method of claim 1, the two buffer sheets being a first sheet and a second sheet, the second sheet being located below the first sheet; the width of the first sheet perpendicular to the feeding direction is smaller than the width of the second sheet perpendicular to the feeding direction, and the width of the second sheet extends beyond the first sheet on both sides to form a first edge and a second edge, and the first sheet and the second sheet are stacked on each other and fed continuously; After the first sheet and the second sheet are stacked, the position of the first horizontal glue of the first sheet corresponds to the position of the first horizontal glue of the second sheet, and the position of the first vertical glue of the second sheet is located at the first sheet is provided with a second horizontal glue position outside the first longitudinal glue position of the first sheet; wherein, when the first sheet and the second sheet are manufactured, or after the first sheet and the second sheet are manufactured and before being stacked, the first sheet or the second sheet is provided with a second horizontal glue position on at least one side facing each other, and the second sheet is provided with a second vertical glue position on one side facing the first sheet, the second vertical glue position is only located at the first edge or the second edge of the second sheet along the feeding direction, and the positions of the stacked first sheet and the second sheet are such that the position of the second horizontal glue position is opposite to the position of the first horizontal glue position; Step A2: synchronously feeding the stacked first sheet and the second sheet and rolling them in a stacked state, so that the first sheet and the second sheet are fixed to each other at the position of the second horizontal glue; Step A3: The stacked first sheet and the second sheet are fed synchronously in a stacked state, and the first edge or the second edge of the second sheet having the second longitudinal glue position is folded toward one side of the first sheet, and the first edge or the second edge is rolled after folding to fix the first sheet and the second sheet to each other at the second longitudinal glue position, thereby forming the packaging bag.

17. The method for making a packaging bag according to claim 16, wherein: The second longitudinal glue is arranged on the first edge, the width of the second edge is greater than the width of the first edge, and the first edge is folded and fixed to the first sheet to form the bag bottom of the packaging bag.

18. The method for making a packaging bag according to claim 17, characterized in that: The method further comprises: Step A4: Continuously unwind the release paper, and set a fifth longitudinal glue on the side of the release paper facing the second sheet during unwinding, with the position of the fifth longitudinal glue being continuously set along the feeding direction; during the unwinding process, the fifth longitudinal glue is pasted on the second edge in the direction of the second sheet; the first sheet, the second sheet and the release paper that are pressed and fixed are cut by rolling to form the packaging bag.

19. A buffer sheet manufacturing module, characterized in that: The buffer sheet comprises a first surface and a second surface, and the manufacturing module comprises: A first unwinding unit, which is disposed on the machine platform and is used to unwind the first surface and continuously feed the first surface along the length direction of the machine platform; The second unwinding unit is arranged on the machine table, and is used to unwind the second surface, and make the second surface be continuously fed synchronously with the first surface along the length direction of the machine table, and the second surface is located below the first surface; the first surface and / or the second surface are facing the first surface or On one side of the second surface, first horizontal glue is applied at intervals perpendicular to the feeding direction; on the side of the first surface and / or the second surface facing the other first surface or the second surface, first vertical glue is applied continuously along both side edges in the feeding direction; the position of the first horizontal glue on the first surface is opposite to the position of the first horizontal glue on the second surface during the feeding process, and the position of the first vertical glue on the first surface is opposite to the position of the first vertical glue on the second surface during the feeding process; A paper pressing unit, the paper pressing unit is used to roll and clamp and press the position of the first transverse glue and the position of the first longitudinal glue set on the first surface and / or the second surface, so as to press and fix the first surface and the second surface at the position of the first transverse glue and the position of the first longitudinal glue, thereby forming the buffer sheet, wherein gas is sealed between the first surface and the second surface so that the buffer sheet has a buffering effect.

20. The buffer sheet manufacturing module according to claim 19, characterized in that: The production module also includes: At least one third unwinding unit, the third unwinding unit is arranged on the machine platform and is used for unwinding the buffer layer or the third surface; At least one material pulling roller, which is arranged on the machine platform and is used to continuously feed the buffer layer or the third surface, wherein the buffer layer is located below the first surface and is continuously fed synchronously with the first surface; At least one of the buffer layers is provided with a first horizontal adhesive perpendicular to the feeding direction; the position of the first horizontal adhesive on the first surface is opposite to the position of the first horizontal adhesive on the second surface during the feeding process; The first surface, the second surface and the buffer layer are pressed and fixed to each other at the position of the first horizontal glue.

21. The buffer sheet manufacturing module according to claim 20, characterized in that: The buffer layer is any one of a paper three-dimensional grid structure, a bubble film, corrugated paper, and honeycomb paper.

22. The buffer sheet manufacturing module according to claim 21, characterized in that: At least one buffer layer is provided with first longitudinal glue on both side edges along the feeding direction facing the first surface or the second surface, and the position of the first longitudinal glue on the first surface and / or the second surface is opposite to the position of the first longitudinal glue on the buffer layer.

23. The buffer sheet manufacturing module according to claim 22, characterized in that: The buffer layer is a paper three-dimensional grid structure; the production module also includes a cutting roller, which is arranged between the third unwinding unit and the pulling roller. The third unwinding unit is used to unwind the third side. The cutting roller cuts the third side into die-cut paper during continuous feeding. The die-cut paper is stretched to form the buffer layer. The pulling roller is used to stretch the die-cut paper after the third side is cut.

24. The buffer sheet manufacturing module according to claim 23, characterized in that: The cutting roller is provided with rows of cutting knives, which extend from one end of the cutting roller to the other end and are located on the outer peripheral surface of the cutting roller. The cutting knives in the same row have spaced protrusions, which form slits for die-cutting the die-cutting paper. The protrusions in two adjacent rows of the cutting knives are staggered.

25. The buffer sheet manufacturing module according to claim 19, characterized in that: A second horizontal glue perpendicular to the feeding direction is applied to a side surface of the second surface or the first surface facing away from the other first surface or the second surface, and the second horizontal glue is arranged perpendicular to the feeding direction at intervals. A second longitudinal glue is continuously applied to a side surface of the second surface or the first surface facing away from the buffer layer along a side edge in the feeding direction; the position of the second horizontal glue corresponds to the position of the first horizontal glue, and the position of the second longitudinal glue corresponds to the position of one of the first longitudinal glues.

26. The buffer sheet manufacturing module according to claim 20, characterized in that: The manufacturing module further includes a first gluing structure, a second gluing structure and a third gluing structure having the same number as the third unwinding unit, which are respectively arranged on the machine platform, wherein the first gluing structure is used for rolling and clamping the first surface, and applying a first horizontal glue in a vertical feeding direction to the first surface at intervals during continuous feeding; The second glue applying structure is used for rolling and clamping the second surface, and applying first horizontal glue in a perpendicular feeding direction to the second surface at intervals during the continuous feeding process; The third glue application structure is used for feeding to the buffer layer, and in the process of continuous feeding, the first horizontal glue is applied to at least one buffer layer at intervals in a direction perpendicular to the feeding direction.

27. The buffer sheet manufacturing module according to claim 26, characterized in that: The manufacturing module further includes a fourth gluing structure, and the fourth gluing structure is used to continuously apply a first longitudinal glue to the first surface and / or the second surface, or the two side edges of the buffer layer along the feeding direction.

28. The buffer sheet manufacturing module according to claim 20, characterized in that: The paper pressing unit comprises: At least one set of paper pressing rollers, each of which is provided with a paper pressing boss, and the paper pressing boss is perpendicular to the The feeding direction of the machine table is extended from one end of the paper pressing roller toward the other end; when the paper pressing roller rotates, the paper pressing boss is used to press and fix the first surface, the buffer layer and the second surface only at the position of the first horizontal glue.

29. The buffer sheet manufacturing module according to claim 28, characterized in that: The paper pressing unit also includes: At least one group of rotating units, each group of rotating units includes two rotating wheels, the two rotating wheels are arranged in parallel and opposite to each other, one rotating wheel is located above the edge of one side of the first surface and / or the second surface along the feeding direction, and the other rotating wheel is located above the edge of the other side of the first surface and / or the second surface along the feeding direction; during the feeding process of the first surface, the second surface and the buffer layer, the rotating wheels are pressed against both sides of the first surface or the second surface and are opposite to the position of the first longitudinal glue, so as to fix the buffer layer, the first surface and the second surface at the position of the first longitudinal glue during the feeding process.

30. The buffer sheet manufacturing module according to claim 29, characterized in that: The manufacturing module also includes an oven, which is disposed on the machine platform and is used to heat the buffer sheet so that the first surface, the second surface and the buffer layer are fixed to each other at the position of the first horizontal glue and the position of the first vertical glue.

31. The buffer sheet manufacturing module according to claim 26, characterized in that: The first glue applying structure, the second glue applying structure and the third glue applying structure all include a glue applying roller, and at least one glue rolling position is arranged on the outer peripheral surface of the glue applying roller, and the glue rolling position is perpendicular to the feeding direction of the machine and extends from one end of the glue applying roller toward the other end; when the glue applying roller rotates, glue is applied to the first surface and / or the second surface and the buffer layer respectively only when the glue applying position contacts the first surface, the second surface or the buffer layer.

32. Packaging bag making equipment, characterized in that: The packaging bag making equipment comprises: Two buffer sheet production modules according to claim 19 or 20, one buffer sheet production module is used to produce a buffer sheet as a first sheet, and the other buffer sheet production module is used to produce another buffer sheet as a second sheet, wherein the first sheet is located above the second sheet and overlaps with the second sheet from top to bottom, and is fed synchronously and continuously; The fifth gluing structure rolls and applies glue to the side of the first sheet toward the second sheet so that the The second side of the first sheet is applied with a second horizontal glue perpendicular to the feeding direction at intervals, or the second sheet is rolled and glued toward the side of the first sheet, so that the first side of the second sheet is applied with a second horizontal glue perpendicular to the feeding direction at intervals, and the position of the second horizontal glue is opposite to the position of the first horizontal glue in the first sheet or the second sheet; A bag-forming glue application structure, the bag-forming glue application structure is used to continuously apply a second longitudinal glue to the side of the first sheet facing the second sheet and / or the side of the second sheet facing the first sheet, the position of the glue application structure is a side edge of the first sheet or the second sheet along the length direction, the position of the continuously applied second longitudinal glue is continuous along the length direction, and the position of the second longitudinal glue is opposite to one of the positions of the first longitudinal glue in the first sheet or the second sheet; At least one set of pressing rollers, the pressing rollers are arranged at the rear end of the bagging glue-applying structure, the pressing rollers clamp the first sheet and the second sheet, and roll the position of the second longitudinal glue after the bagging glue-applying structure has applied glue, and the position of the second transverse glue on the first surface or the second surface opposite to each other on the first sheet or the second sheet in the vertical feeding direction, so as to fix the first sheet and the second sheet; The rolling and cutting module is arranged at the rear end of the pressing roller, and is used to clamp the first sheet and the second sheet after being pressed and fixed, and cut the fixed first sheet and the second sheet at the position of the second horizontal glue during the rolling process, so as to form a plurality of packaging bags during the continuous feeding process.

33. Packaging bag making equipment, characterized in that: The packaging bag making equipment comprises: Two buffer sheet production modules as claimed in claim 25, one buffer sheet production module is used to produce a buffer sheet as a first sheet, and the other buffer sheet production module is used to produce another buffer sheet as a second sheet, the first sheet is located above the second sheet and overlaps with the second sheet from top to bottom, and is fed synchronously and continuously; At least one set of pressing rollers, the pressing rollers are arranged at the rear ends of the two manufacturing modules, the pressing rollers clamp the first sheet and the second sheet, and roll the position of the second longitudinal glue and the position of the second transverse glue on the first surface or the second surface opposite to each other on the first sheet or the second sheet in the vertical feeding direction, so as to fix the first sheet and the second sheet; The rolling and cutting module is arranged at the rear end of the pressing roller, and is used to clamp the first sheet and the second sheet after being pressed and fixed, and to cut the first sheet and the second sheet after being fixed during the rolling process. Cutting is performed at the position of the second horizontal glue, so that a plurality of packaging bags are formed during continuous feeding. Or, 34. The packaging bag making equipment according to claim 32 or 33, characterized in that: The packaging bag making equipment also includes: A covering paper module, wherein the covering paper module is arranged at the front end of the pressing roller, and the covering paper module is used to unwind the covering paper and continuously apply glue on the edge of the covering paper along the feeding direction to form a third longitudinal glue position, and the third longitudinal glue position is located on the side of the covering paper facing the first sheet. During the process of synchronous feeding of the covering paper with the first sheet or the second sheet, the third longitudinal glue position is pasted on the side of the second sheet away from the second longitudinal glue position to form a cover.

35. The method for making a packaging bag according to claim 34, characterized in that: The packaging bag making equipment also includes: A release paper module is arranged at the front end of the pressing roller. During the continuous unwinding of the cover paper, the release paper module continuously applies glue to the cover paper toward the middle position of the first sheet to form a fourth longitudinal glue position. The fourth longitudinal glue position is continuous along the feeding direction, and the release paper roll is continuously unwound synchronously, and the release paper is pasted to the fourth longitudinal glue position of the cover paper.

36. The method for making a packaging bag according to claim 35, characterized in that: When the rolling and cutting module cuts the fixed glue position in the vertical feeding direction, it simultaneously cuts the cover paper and the release paper, thereby forming a packaging bag with a cover.

37. The packaging bag making equipment according to claim 32 or 33, characterized in that: The width of the first sheet perpendicular to the feeding direction is smaller than the width of the second sheet perpendicular to the feeding direction, and the width of the second sheet extends beyond the first sheet on both sides to form a first edge and a second edge; The second longitudinal glue is located only at the first edge or the second edge of the second sheet along the feeding direction, and the first edge and the second edge extend out of the first sheet, and the first edge or the second edge having the second longitudinal glue is the bag bottom edge; A bottom turning module, which is arranged at the rear end of the bag forming and gluing structure and is used to fold the bottom edge of the second sheet after continuous gluing, so that the bottom edge of the bag wraps the opposite edge of the first sheet; The pressing pulley is used to press the folded bottom edge of the bag to fix it to the first sheet.

38. The packaging bag making equipment according to claim 37, characterized in that: The first edge or the second edge at the position without the second longitudinal glue is a cover, and the width of the cover along the vertical feeding direction is greater than the width of the bag bottom edge.

39. The packaging bag making device according to claim 38, characterized in that: The device comprises: A release paper module is arranged at the front end of the pressing pulley. During the continuous feeding of the cover, the release paper module continuously applies glue to the cover toward the middle position of the first sheet to form a fourth longitudinal glue position. The position of continuous gluing at the fourth longitudinal glue position is continuous along the feeding direction, and the release paper roll is continuously unwound synchronously, and the release paper is pasted to the fourth longitudinal glue position at the gluing position at the middle position of the cover paper.

40. The packaging bag making device according to claim 39, characterized in that: The device comprises: A release paper module is provided at the front end of the pressing pulley. When unwinding, the release paper module sets a fifth longitudinal glue on the side of the release paper facing the second sheet, and the position of the fifth longitudinal glue is continuously set along the feeding direction; during the unwinding process, the position of the fifth longitudinal glue is pasted on the cover toward the second sheet; the first sheet, the second sheet and the release paper that are pressed and fixed are cut by rolling cutting to form the packaging bag.

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