Cushioning sheet manufacturing module and packaging bag manufacturing apparatus

Abstract

A cushioning sheet manufacturing module for manufacturing cushioning sheets, the cushioning sheet manufacturing module (100) comprising: a first unwinding unit (10) for unwinding a first surface (A1); a cushioning layer feeding layer (20) for unwinding a cushioning layer (B1), a glue for bonding being applied to the cushioning layer and / or the first surface; a paper-laminating unit (30) for roll-clamping the first surface and the cushioning layer so as to bond the first surface to the cushioning layer; and a cutting unit (40), which is arranged at the front end of the paper-laminating unit in a feeding direction, and rolls and cuts the cushioning layer at intervals during feeding, wherein a cutting position is perpendicular to the feeding direction. According to a variable rate, the cushioning layer feeding unit reduces a feeding rate after cutting, so that an uncovered gap (S) is formed on the first surface by the cut cushioning layers, and after a distance of the gap (S), the cushioning layer is fed synchronously with the first surface and is connected thereto. Further disclosed is a cushioning sheet manufacturing apparatus (200). The cushioning sheet manufacturing module solves the technical problems of the manufacturing efficiency of existing cushioning sheets being low and it not being possible for manufacturing modules to be compatible with various different cushioning layer structures.

Description

Buffer sheet production module and packaging bag production equipment Technical Field

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

[0002] As shown in Figure 1, a cushioning packaging bag 100a is formed by folding a cushioning sheet 10a with a bottom A and sealing both sides B. Alternatively, the cushioning bag 100a is formed by gluing two cushioning sheets 10a together with their sides sealed B and the bottom A glued together. The gluing of the bottom A can include gluing the bottom A of the two cushioning sheets 10a directly to each other, or gluing one of the cushioning sheets 10a with its bottom A turned upside down. Gluing the bottom A upside down means overlapping the two cushioning sheets 10a, folding the bottom A of one cushioning sheet 10a toward the bottom A of the other cushioning sheet 10a, and then gluing the folded portion to the other cushioning sheet 10a.

[0003] From the above manufacturing process of the cushioning packaging bag 100a, it can be seen that the cushioning sheets 10a / 10b need to be manufactured first during the manufacturing process of the cushioning packaging bag 100a. The manufacturing speed of the cushioning sheets 10a directly affects the manufacturing efficiency of the packaging bag 100a.

[0004] Referring to Figures 1 and 2 , the buffer sheet 10a itself comprises at least two layers: an outer layer A1 and a buffer layer B1. The outer layer A1 forms the outer wall of the packaging bag 100a after being fabricated into the packaging bag 100a. The buffer layer B1 is located within the outer wall and also serves to contain objects in the packaging bag. Common buffer sheets 10a may also comprise a three-layer structure, as shown in Figure 3 , comprising an outer layer A1, a buffer layer B1, and an inner layer C1. The buffer layer B1 is located between the outer layer A1 and the inner layer C1. The buffer layer B1 described herein may be a single-layer or multi-layer structure. The entire buffer layer B1, or at least a portion of the buffer layer B1, is adhered to the outer layer A1 or the inner layer C1 to secure the buffer layer B1.

[0005] As shown in Figures 4a-4d, the buffer sheet 10a has the following types according to the different buffer layers B1:

[0006] 1. The cross section of the buffer layer is a corrugated paper structure with a wavy shape, as shown in Figure 4a;

[0007] 2. The buffer layer has a concave-convex structure after molding, as shown in Figure 4b;

[0008] 3. The buffer layer is a plastic bubble film, as shown in Figure 4c;

[0009] 4. The buffer layer is a three-dimensional hexagonal grid structure formed by stretching the slit paper, as shown in Figure 4d. The slit paper 20a refers to a cut edge 21a cut out of the paper material. The multiple cut edges 21a are arranged in rows and columns. The cut edges 21a in the same row are spaced apart from each other, and the cut edges 21a in adjacent rows are staggered. When such a slit paper 20a is stretched, it will be twisted and stretched into a three-dimensional hexagonal opening 22a at the position of the cut edge 21a, causing the slit paper 20a to expand in the thickness direction, thereby having a buffering function.

[0010] Regardless of whether the existing buffer sheet material has the aforementioned two-layer or three-layer structure, and whether the buffer layer has a single layer or multiple layers, and regardless of any of the aforementioned specific structures, the buffer layer must be entirely or partially attached to the outer layer and / or inner layer during production. Referring to FIG5 , when actually using automated equipment to produce a buffer sheet material 10a, it is necessary to feed a strip-shaped buffer layer B1 in a coiled form simultaneously with the outer layer A1 and inner layer in a coiled form. The buffer layer B1, inner layer, and outer layer A1 are stacked in an up-and-down direction while being fed. When the strip-shaped buffer layer B1 is attached to the inner layer and / or outer layer A1 in a coiled form, the strip-shaped buffer sheet material 10a is formed. However, the buffer layer B1 itself has a buffering effect and has a certain thickness. When the buffer layer B1 is pasted to the inner layer and / or outer layer A1, in addition to applying glue to the pasting position of the inner layer / or outer layer A1, the buffer layer B1 and the inner layer / outer layer A1 also need to be heated and pressed at this position so that the applied glue has maximum adhesion, ensuring that the buffer layer B1 can be firmly fixed on the inner layer and / or outer layer A1. Moreover, during the pressing process, the buffer layer B1 needs to be pressed into a plane at the gluing position so that it can fully contact and be fixed with the gluing surface of the outer layer and / or inner layer.

[0011] When using this manufacturing process to make buffer sheets, the heating and pressing process is time-consuming. The pressing process needs to be maintained for a short period of time to press the buffer layer into a flat surface, and the applied glue also needs to be heated for a period of time. When the manufacturing equipment adopts an intermittent step-by-step feeding method, that is, after feeding for a period of time, the feeding stops, and the heating and pressing structure heats and presses the positions where the buffer layer and the inner layer / outer layer need to be pasted during the stopping time. When the heating and pressing are completed, the feeding continues for a period of time, and then the feeding stops, and the process repeats in sequence. In addition, in some equipment, after heating and pressing, the buffer sheet needs to be heated again to achieve the purpose of drying and further curing the glue. In this type of manufacturing equipment, since the feeding is in a stopped state for a period of time, the production efficiency of the entire buffer sheet will be reduced. The length of the buffer sheet produced by this step-by-step feeding manufacturing equipment per minute is not more than 50m.

[0012] On the other hand, when two strips of cushioning sheet material are fed and stacked together to form a cushioning packaging bag, the two strips of cushioning sheet material must be glued at intervals along the feeding direction. These glued locations are then heated and pressed together. These intervals of glued locations form the two sides of the packaging bag after cutting. This means that heating and pressing are also required to secure the two sheets together to form the cushioning packaging bag, which also requires overcoming the aforementioned technical issues of low production efficiency.

[0013] In addition, the heating and pressing time is related to the structure of the buffer layer itself. The better the buffering effect of the buffer layer, the longer the heating and pressing time is, because the buffer layer is more difficult to be pressed into a flat surface and requires a longer contact time with the glue to be fixed. For such production equipment, different step feeding methods, namely step feeding time and step stopping time, need to be set according to the production of buffer sheets and buffer packaging bags with different buffer layers. This makes it difficult to form a buffer sheet and buffer packaging bag production equipment that is compatible with buffer layers of all structures.

[0014] Summary of the Invention

[0015] The object of the present invention is to provide a buffer sheet manufacturing module, aiming to solve the technical problems of low efficiency in the existing buffer sheet manufacturing and the inability of the manufacturing module to be compatible with a variety of different buffer layer structures.

[0016] The present invention provides a buffer sheet production module, which includes:

[0017] a first unwinding unit, for unwinding the first surface and feeding the first surface continuously along an unwinding direction;

[0018] a buffer layer feeding unit, configured to continuously feed the buffer layer along a feeding direction, wherein the buffer layer is located on one side of the first surface; glue for adhering the first surface and the buffer layer is applied on a surface of the buffer layer and / or the first surface facing the other first surface or the buffer layer;

[0019] a paper pressing unit configured to roll and clamp the first surface and the buffer layer at a position where glue is provided on the first surface and / or the buffer layer to adhere the first surface and the buffer layer, thereby fixing the first surface and the buffer layer;

[0020] a cutting unit, the cutting unit being arranged at the front end of the paper pressing unit in the feeding direction, and the cutting unit rollingly cutting the buffer layer at intervals while feeding, with the cutting position being perpendicular to the feeding direction;

[0021] wherein the cut buffer layer forms a first end portion and a second end portion in the order of cutting, and the cut buffer layer is sequentially fed to the paper pressing unit from the first end portion to the second end portion, and is clamped together with the first surface by the paper pressing unit and fixed to the first surface;

[0022] The first unwinding unit has a first feeding rate a; the buffer layer feeding unit has a variable second feeding rate b, the second feeding rate b includes a rate b1 and a rate b2, the rate b2 is the same as the first feeding rate, and the rate b1 is less than the first feeding rate b;

[0023] A gap S is formed on the first surface between the first end of the cut buffer layer and the second end of the previous cut buffer layer; after the cutting unit cuts the buffer layer, the buffer layer feeding unit continuously feeds it at the rate b1 which is less than the first feeding rate a until the buffer layer reserves the gap S relative to the first surface, and the first end is fixed on the first surface and then continuously and synchronously fed with the first surface at the rate b2.

[0024] The present invention also discloses a second buffer sheet manufacturing module, wherein the buffer sheet manufacturing module comprises:

[0025] a first unwinding unit, for unwinding the first surface and feeding the first surface continuously along an unwinding direction;

[0026] a third unwinding unit, for unwinding a third surface and continuously feeding the third surface along an unwinding direction, wherein the third surface is provided with a plurality of folds perpendicular to the unwinding direction;

[0027] a slit paper unwinding unit, configured to unwind the slit paper so that the slit paper is continuously fed in an unwinding direction, the slit paper being located between the first surface and the third surface; glue being provided on both ends of the slit paper relative to the third surface, or on the third surface relative to the slit paper, along the feeding direction; and glue being provided on one end of the slit paper relative to the first surface, or on the first surface relative to the slit paper, along the feeding direction.

[0028] a paper pressing unit for rolling and clamping the first side and the slit paper at a location where glue is provided so as to fix the first side and the slit paper at only one end, and for rolling and clamping the third side and the slit paper at a location where glue is provided so as to fix the third side and both ends of the slit paper;

[0029] A cutting unit, the cutting unit being arranged at the front end of the paper pressing unit in the feeding direction, and the cutting unit rollingly cutting the slit paper at intervals while feeding, with the cutting position being perpendicular to the feeding direction;

[0030] wherein the cut slit paper forms a first end and a second end in the order of cutting, and the cut slit paper is sequentially fed to the paper pressing unit from the first end to the second end, and the paper pressing unit fixes one end of the slit paper on the first surface, and fixes both end portions of the slit paper on the third surface; after the slit paper is fixed on the first surface, a gap S is formed on the first surface that does not cover the slit paper and is perpendicular to the feeding direction; the gap S is provided, and the gaps S are arranged at intervals along the feeding direction of the first surface; after the slit is fixed on the first surface, at least two cut slit papers are arranged between two adjacent gaps S;

[0031] The first unwinding unit has a first feeding rate a; the slit paper unwinding unit has a variable second feeding rate b, the second feeding rate b includes a rate b1, a rate b2 and a rate b3, the rate b2 is the same as the first feeding rate b, the rate b1 is less than the first feeding rate b, and the rate b3 is greater than the first feeding rate b;

[0032] When the first end of the cut slit paper is located at the end position of the interval S, the slit paper unwinding unit feeds the slit paper at a rate b2, so that the slit paper is fed synchronously with the first surface; when the second end of the cut slit paper is fed between two adjacent intervals S, the slit paper unwinding unit feeds the slit paper at a rate b3, and the first end of the slit paper fed at the rate b3 overlaps with the second end of the previous slit paper that has been cut. After the slit papers overlap, the slit paper unwinding unit continues to feed the slit paper at a rate b2 until the second end of the next cut slit paper is located at the starting position of another adjacent interval S. The slit paper unwinding unit feeds the slit paper at a rate b1, so that the second end of the next slit paper is located at the end position of the interval S relative to the first surface, and the slit paper unwinding unit feeds the slit paper again at a rate b2, thereby forming two pieces of partially overlapping slit paper in the two adjacent intervals S on the first surface.

[0033] The present invention discloses a packaging bag production device, the production device comprising two buffer sheet production modules, the buffer sheet production modules being used to produce buffer sheets, the buffer sheets produced by the two buffer sheet production modules being respectively a first sheet and a second sheet, the first sheet and the second sheet being identical, the first sheet and the second sheet being opposite to each other and being fed synchronously;

[0034] a first bag-forming glue-applying unit, configured to apply glue to the surface of the first sheet and / or the second sheet facing the second sheet or the first sheet, wherein the positions where the first bag-forming glue-applying units apply glue are arranged at intervals and perpendicular to the feeding direction, and the positions where the first bag-forming glue-applying units apply glue correspond to the interval S between the first sheet and the second sheet, and the buffer layer of the first sheet is opposite to the buffer layer of the second sheet;

[0035] The first bag forming and pressing unit is used for rolling and pressing the first sheet and the second sheet together, and pressing the first sheet and the second sheet together at a position corresponding to the interval S, thereby forming two side edges of the packaging bag.

[0036] The present invention discloses another packaging bag making equipment, which includes two second-type buffer sheet making modules. The second packaging bag making equipment of the present invention includes two second-type buffer sheet making modules. The second buffer sheets made by the two second-type buffer sheet making modules are fed synchronously with their third sides facing each other, and are pressed and bonded to each other at a gap S.

[0037] The buffer sheet production module disclosed in the present invention is compatible with the production of buffer layers of various structures. At the same time, no buffer layer is set when pressing and pasting at adjacent intervals S. Compared with the prior art, the buffer layer does not need to be flattened at the intervals S, and does not require more pressing and heating time. At the same time, a continuous feeding method is adopted, and different feeding rates are used to form a buffer layer, which greatly improves the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figures 1 to 5 are comparison diagrams of the prior art;

[0039] FIG6 is a schematic diagram of a buffer sheet manufacturing module according to an embodiment of the present invention;

[0040] FIG7 is a schematic structural diagram of a cutting unit of the present invention;

[0041] 8a to 8e are schematic diagrams of the gluing positions on the first surface or the buffer layer of the present invention;

[0042] 9 is a schematic diagram of a buffer sheet manufacturing module for manufacturing a packaging bag according to an embodiment of the present invention;

[0043] 10 is a schematic diagram of a buffer sheet manufacturing module in a second embodiment of the present invention;

[0044] 11 is a schematic diagram of a buffer sheet manufacturing module in a third embodiment of the present invention;

[0045] FIG12 is a schematic structural diagram of a rolling unit according to the present invention;

[0046] FIG13 is a schematic diagram of the buffer layer structure in a fourth embodiment of the present invention;

[0047] 14 is a schematic diagram of a buffer sheet manufacturing module in a fourth embodiment of the present invention;

[0048] 15 is a schematic diagram of the structure of the buffer sheet after production in accordance with the fourth embodiment of the present invention;

[0049] 16 is a schematic diagram of the structure of a buffer sheet produced in accordance with Embodiment 5 of the present invention;

[0050] 17 is a schematic diagram of a buffer layer manufacturing process in Embodiment 5 of the present invention;

[0051] 18 is a schematic diagram of a buffer sheet manufacturing module in Embodiment 5 of the present invention;

[0052] FIG19 is a schematic diagram of a buffer layer manufacturing process in Embodiment 6 of the present invention;

[0053] 20 is a schematic diagram of a buffer sheet manufacturing module in Embodiment 6 of the present invention;

[0054] 21 is a schematic structural diagram of a packaging bag making device in accordance with a seventh embodiment of the present invention;

[0055] 22 is a schematic diagram of the mechanism of the packaging bag making device in the eighth embodiment of the present invention;

[0056] 23 is a schematic diagram of the gluing position of the buffer sheet in the eighth embodiment of the present invention;

[0057] 24 to 27 are schematic diagrams of packaging bags produced according to Embodiment 7 and Embodiment 8 of the present invention. DETAILED DESCRIPTION

[0058] The present invention will be further described and explained below in conjunction with specific embodiments and accompanying drawings:

[0059] Implementation method one:

[0060] Referring to FIG. 6 , the present invention discloses a buffer sheet manufacturing module 100 for manufacturing a buffer sheet C1 , which includes: a first unwinding unit 10 , a buffer layer feeding unit 20 , a paper pressing unit 30 and a cutting unit 40 .

[0061] Among them, the first unwinding unit 10 is used to unwind the first surface A1 and feed the first surface A1 continuously along the unwinding direction; continuous feeding in this application refers to uninterrupted and non-stop continuous transportation or unwinding, which is different from step-by-step feeding.

[0062] The buffer layer feeding unit 20 is used to continuously feed the buffer layer B1 along the feeding direction, and the buffer layer B1 is located on one side of the first surface A1; the buffer layer B1 and / or the first surface A1 is applied with glue for bonding the first surface A1 and the buffer layer B1 on a surface facing the other first surface A1 or the buffer layer B1, wherein the glue applied can be applied before unwinding or during the feeding process of the first surface A1 or the buffer layer B1, and it is only necessary to ensure that the glue applied can bond the first surface A1 and the buffer layer B1 or at least part of the two to each other without separation. In which, the paper pressing unit 30 is used to roll and clamp the first surface A1 and the buffer layer B1 at the position where glue is set on the first surface A1 and / or the buffer layer B1 for pasting, so as to fix the first surface A1 and the buffer layer B1, wherein the paper pressing unit 30 also rolls continuously, and the rolling rate is the same and synchronized with the unwinding rate of the first unwinding unit 10, so as to ensure that the first surface A1 and the buffer layer B1 are completely fixed to each other at the gluing position as much as possible, and there is no situation where the gluing position is partially unfixed.

[0063] The cutting unit 40 is arranged at the front end of the paper pressing unit 30 in the feeding direction, that is, close to the side of the first unwinding unit 10. The cutting unit 40 rolls and cuts the buffer layer B1 at intervals while feeding, and the cutting position is perpendicular to the feeding direction.

[0064] In this embodiment, the buffer layer B1 can be cut into multiple independent buffer units B0 by cutting at intervals. At the same time, the rolling cutting can cut the buffer layer B1 synchronously with the feeding process of the buffer layer B1, which will not affect the feeding process, can save time and improve production efficiency.

[0065] As shown in Figure 7, the cutting unit 40 includes a rolling cutting wheel 41 and a rolling cutter 410 arranged on the circumference of the rolling cutting wheel 41 and perpendicular to the end surface of the rolling cutting wheel 41; when the rolling cutting wheel 41 rotates until the rolling cutter 410 contacts the buffer layer B, as it rotates, the rolling cutter 410 cuts the buffer layer B at a position perpendicular to the feeding direction, thereby forming a buffer unit B0.

[0066] 6 , in particular, the buffer layer B1 is separated into buffer units B0 after cutting, and each buffer unit B0 forms a first end x1 and a second end x2 in the order of cutting. The buffer units B0 are sequentially sent to the paper pressing unit 30 from the first end x1 to the second end x2, and are clamped together with the first surface A1 by the paper pressing unit 30 and fixed to the first surface A1.

[0067] The first unwinding unit 10 has a first feeding rate a; the buffer layer feeding unit 20 has a variable second feeding rate b, the second feeding rate b includes a rate b1 and a rate b2, the rate b2 is the same as the first feeding rate, and the rate b1 is less than the first feeding rate b;

[0068] A gap S is formed on the first surface A1 between the first end x1 of the cut buffer unit B0 and the second end x2 of the previous buffer unit B0; the cutting unit 40 starts to feed the buffer layer feeding unit 20 at the rate b1 which is less than the first feeding rate a at the moment of cutting the buffer layer B1, until the buffer layer B1 reserves the gap S relative to the first surface A1, and the first end x1 is fixed on the first surface A1 and then continuously and synchronously fed with the first surface A1 at the rate b2. The buffer layer B1 is fed synchronously at the rate b2 until it reaches the second end x2 of the buffer layer B1, and the cutting unit 40 rotates to the cutting position again, and separates the buffer unit B0 after cutting. At this time, the first end x1 and the second end x2 of the buffer unit B0 are fixed on the first surface A1 after passing through the paper pressing unit 30 in sequence, and the buffer layer feeding unit 20 feeds it continuously at the rate b1 again in this reciprocating manner, and reserves a gap S on the first surface, and then continues to feed it according to the above-mentioned feeding method, thereby producing the buffer sheet C1.

[0069] As shown in FIG6 , in this embodiment, the buffer layer B1 includes a liner B11 , and the cross-section of the liner B11 is at least one of a wavy corrugated paper structure, a concave-convex structure, a plastic bubble film, and a three-dimensional hexagonal grid structure after slit paper is stretched.

[0070] In this embodiment, the first unwinding unit 10 continuously unwinds at a fixed feeding rate a, while the buffer layer B1 is fed at a variable rate b, and cooperates with the cutting unit 40 to cut at a position where an interval S is reserved, so that the buffer units B0 are distributed at intervals on the first surface 10 and fed to the paper pressing unit 30 together with the first surface 10; wherein, the buffer sheet C1 does not need to be heated and pressed between the first surface 10 and the buffer layer B1, especially there is no need to press the buffer layer B1 into a planar structure, which can save heating and pressing time, and the cut buffer unit B0 only needs to be guided in the feeding direction and placed on the first surface 10, so that the buffer unit B0 can be fixed on the first surface.

[0071] As shown in Figure 6, in the present invention, the production module 100 includes a first gluing unit 50, which is used to continuously apply glue for pasting the first surface A1 and the buffer layer B to the buffer layer B1 and / or the first surface A1 on a surface facing the other first surface A1 or the buffer layer 50. The position where the first gluing unit 50 applies glue is located on the first surface A1 or the buffer layer B1, and along at least one side of the feeding direction.

[0072] In the present invention, the first gluing unit 50 applies glue along the feeding direction, i.e., the first portion fed first is glued first, and the portion to be glued last is glued last, with the glue application path along the feeding direction. The glue application location is located on at least one surface of the first surface A1 or the buffer layer B1 that faces each other. In other words, the glue application location can be on the surface of the first surface A1 facing the buffer layer B1, and / or on the surface of the buffer layer B1 facing the first surface A1. The glue application range of "at least one side" includes any of the following:

[0073] A. The gluing range is located on the first surface A1 or the entire surface of the buffer layer B1, as shown in Figure 8a;

[0074] B. The gluing range is located in the entire area of ​​the first surface A1 or the surface of the buffer layer B1 between two adjacent spaces S, as shown in FIG8 b ;

[0075] C. The gluing range is located in a partial area of ​​the surface between the first surface A1 or the buffer layer B1 and two adjacent spaces S, as shown in FIG8c ;

[0076] D. The gluing range is located on one side of the first surface A1 or the buffer layer B1 close to the edge along the feeding direction, as shown in FIG8d;

[0077] E. The gluing position is located at two side edges of the first surface A1 or the buffer layer B1 along the feeding direction close to the edge, as shown in FIG8e.

[0078] In the present invention, the gluing position needs to be reasonably selected and verified based on the structural characteristics of the liner B11 in the buffer layer B1 and the feeding rate.

[0079] For example, when the liner B11 is a plastic bubble film, since the plastic bubble film itself is relatively soft and stretchable, the first gluing unit 50 can apply glue according to the gluing range A or the gluing range B. At this time, due to the stretchability and softness of the plastic bubble film, it is easy to stick between the two gaps S of the entire first surface A1, which has no effect on the feeding rate and can maximize the feeding rate.

[0080] Another example: when the liner B11 is a corrugated paper structure, due to the relatively high hardness of the corrugated paper and the uneven wavy surface, it is not suitable to use gluing range A. Using gluing range A will inevitably reduce the feeding rate due to the large gluing range; therefore, gluing can be applied using gluing range C or gluing range E. At this time, less glue can be applied to increase the feeding speed. At the same time, only the two sides of the corrugated paper structure need to be fixed. After the two sides of the corrugated paper structure are fixed, the area located in the middle of the two sides can ensure the integrity of its own wave shape as much as possible without reducing the cushioning performance.

[0081] For another example: when the liner B11 is a hexagonal grid structure, glue can be applied in the manner of gluing range C or range D, and the two side edges of the hexagonal grid structure are fixed at the two ends of the buffer sheet in the horizontal direction along the feeding direction or the vertical direction perpendicular to the feeding direction. At this time, on the one hand, the middle part of the hexagonal grid structure is not fixed to the first surface A1, which has better buffering performance. On the other hand, the method of fixing only the two ends can also prevent the stretched hexagonal grid structure from rebounding to the state before stretching, which can improve the buffering performance of the hexagonal grid structure while taking into account the feeding rate.

[0082] As shown in Figure 9, in particular, when using the buffer sheet C1 in this embodiment to make a packaging bag 200, only two buffer sheet production modules 100 are required to produce two sheets of buffer sheet C1. During the process of continuously feeding the two buffer sheets C1 synchronously and in the same direction, the interval S between the two buffer sheets C1 is relative, and they are fixed at the interval S, and the bottom edge is sealed. At the rear end of the feeding process, the packaging bag 200 is formed by cutting at the fixed interval S. The packaging bag 200 formed does not have a buffer layer B1 or a buffer unit B0 on ​​both sides, that is, at the position of the interval S. Therefore, when the side edges (interval S) are fixed, there is no need for long-term pressing and heating and waiting, which can maximize production efficiency. In addition, during the lamination process, it is not necessary to laminarize the entire area of ​​the buffer layer B1 or the buffer unit B0. Only the side edges (interval S) need to be laminarized. The buffer layer B1 and the buffer unit B0 do not need to be laminarized. This can prevent damage to or reduction in the buffer performance of the buffer layer B1 or the buffer unit B0, and prevent the problem of reduced thickness of the buffer unit B0 and reduced buffer performance due to excessive pressure.

[0083] Implementation Method 2

[0084] As shown in Figure 10 , this embodiment differs from the first embodiment in that the buffer layer B2 includes two layers of padding (B11, B12), namely padding B11 and padding B12, respectively. In this embodiment, the buffer layer B2 may also include more than two layers of padding (B11, B12). Pads B1 and B2 comprise at least one of a corrugated paper structure with a wavy cross-section, a concave-convex structure, plastic bubble film, or a three-dimensional hexagonal grid structure formed by stretching slit paper.

[0085] That is to say, the liner B11 and the liner B12 can be the same, for example, both are corrugated paper structures; the liner B11 and the liner B12 can also be different, for example, the liner B11 is a corrugated paper structure, and the liner B12 is a plastic bubble film.

[0086] In this embodiment, the buffer layer B2 comprises two layers of liners B11 and B12. The production module 100 includes multiple cutting units 40 and multiple first gluing units 50. The buffer layer feeding unit 20 includes multiple liners feeding units 21. The number of liners feeding units 21, the first gluing units 50, and the cutting units 40 is the same as the number of liners (B11, B12), also two. Each liners feeding unit 21 is used to feed a layer of liners B11. At least one first gluing unit 50 is used to continuously apply glue to the surface of one side of liners B11 facing the other side of liners B12, with the glue application position along at least one side of the feeding direction. In other words, glue is applied to at least one surface of liners B11 facing the first surface A1, and at least one surface of liners B12 facing the liners B11, so that the first surface A1, liners B11, and liners B12 are connected to each other. Each cutting unit 40 is used to cut a layer of the pad B. The two layers of pads B11 and B12 are stacked on top of each other and fed continuously and synchronously at a variable feeding rate b. After cutting, the two pad units BO are also stacked on top of each other to form a multi-layer structure.

[0087] Among them, after being cut, one layer of the liner B11 is connected to another adjacent layer of the liner B12 at a continuous gluing position.

[0088] In this embodiment, the positions for continuous gluing are the same as those in any of the gluing ranges AE in the first embodiment, and are similarly selected based on the material and feed rate of the liners (B11, B12). The difference is that when the liners (B11, B12) have two layers, at least one first gluing unit 50 applies glue to at least one of the opposing surfaces of the two liners (B11, B12) to connect the two liners (B11, B12) and secure them together as a whole on the first surface A1.

[0089] In this embodiment, without reducing the feeding rate a in embodiment one, the production of a buffer sheet C2 with a multi-layer padding structure can be achieved during the feeding process, so that the buffer sheet C2 can have a better buffering effect than the buffer sheet C2 in embodiment one.

[0090] Implementation Method 3

[0091] As shown in FIG11 , in this embodiment, the buffer sheet production module 100 further includes, based on the first or second embodiment, a second unwinding unit 60, a second gluing unit 70, and a rolling unit 80. The second unwinding unit 60 is used to unwind the second surface A2, and the first surface A1 and the second surface A2 are fed synchronously and continuously. The buffer layer B3 is the buffer layer B1 in the first embodiment or the buffer layer B3 in the second embodiment, and the buffer layer B3 is located between the first surface A1 and the second surface A2. That is, the second surface A2 has the same feeding rate a as the first surface A1, and the first surface A1 and the second surface A2 are fed synchronously.

[0092] The gluing position of the second gluing unit 70 is: x) on the surface A1 of the second surface A2 facing the first surface, and glue is provided at a position spaced S relative to the first surface A1, or, y) on the surface of the first surface A1 facing the second surface A2, and glue is provided at a position spaced S relative to the first surface A1.

[0093] The rolling unit 80 is used to roll and press the first surface A1 and the second surface A2 at a relative interval S, thereby fixing the first surface A1 and the second surface A2 perpendicular to the feeding direction. The cut buffer layer B3 is located between the two adjacent intervals S and is wrapped by the first surface A1 and the second surface A2.

[0094] The second gluing unit 70 can also be used to continuously apply glue to the surface of the second surface A2 facing the first surface A1, and the gluing position is along at least one side of the feeding direction, for connecting the first surface A1 and the second surface A2 in the feeding direction; wherein the gluing position of "at least one side" is the same as at least one of the gluing positions AE in the first embodiment, and at this time the rolling unit 80 is used to roll and press the edges of the gluing positions that are opposite to the first surface A1 and the second surface A2 and are used to fix them together.

[0095] In this embodiment, the second gluing unit 80 can apply glue at different locations depending on the method and location of securing the first and second surfaces A1 and A2. One method is to secure the first and second surfaces A1 and A2 at a gap S, with the buffer layer B3 positioned between two adjacent gaps S. Another method is to secure the first and second surfaces A1 and A2 near at least one edge along the feed direction, similarly positioning the buffer layer 3B between two adjacent gaps S. In this embodiment, the method of securing the first and second surfaces A1 and A2 is determined by the material used for the buffer layer B3 and the number of pads (B11, B12) in the buffer layer B3.

[0096] The buffer sheet C3 produced in this embodiment comprises a three-layer structure comprising a first surface A1, a buffer layer B, and a second surface A2. The buffer layer B can be provided as one or more layers, depending on the number of liners. Compared to Embodiments 1 and 2, this embodiment includes a second surface A2. The use of the first and second surfaces A1 and A2 to sandwich the buffer layer B in the buffer sheet C3 improves the abrasion resistance of the buffer sheet C2 and also makes the exterior of the buffer sheet C3 more aesthetically pleasing and smoother, facilitating the production of packaging bags using the buffer sheet C3.

[0097] As shown in Figure 12, the rolling unit 80 in the present invention includes: at least one group of paper pressing rollers 81, the paper pressing rollers 81 are provided with paper pressing bosses 82, the paper pressing bosses 82 are perpendicular to the feeding direction, and extend outward from one end or periphery of the paper pressing roller 81; when the paper pressing roller 81 rotates, the paper pressing bosses 82 are used to press and fix the first surface A1, the buffer layer B3 or the buffer unit B0 and the second surface A2 only at the position of the interval S, so that the buffer layer B3 or the buffer unit B0 between two adjacent positions of the interval S is still in a three-dimensional grid structure and is not affected by the pressing.

[0098] Implementation Method 4

[0099] In this embodiment, the buffer sheet production module 100 is improved on the basis of the first embodiment to produce a buffer sheet C4.

[0100] As shown in FIG. 13 and FIG. 14 , in this embodiment, the buffer layer B4 includes: an unstretched slit paper B13 and a third surface A3 .

[0101] The buffer sheet production module 100 further includes a third unwinding unit 90 and a slit paper unwinding unit 10a.

[0102] Specifically, the third unwinding unit 90 is used to unwind the third surface A3 and continuously feed the third surface A3 along the unwinding direction. The third surface A3 is provided with a plurality of wrinkles A31 along the unwinding direction. The wrinkles A31 are unwound along with the third surface A3 and are in an unstretched state. The slit paper unwinding unit 10a is used to unwind the slit paper B13 and continuously feed the slit paper B13 along the unwinding direction. The slit paper B13 is located between the first surface A1 and the third surface A3.

[0103] The slit paper B13 and the third surface A3 are unwound synchronously, and the slit paper B13 and the third surface A3 are connected to each other at two sides y1 along the feeding direction.

[0104] The buffer layer B4 in this embodiment differs from the buffer layer in the first embodiment. Specifically, in this embodiment, the buffer layer B4 is formed by connecting the slit paper B13 and the third surface A3. The glue applied by the first gluing unit 50 is only located on the opposing surfaces of the first surface A1 or the buffer layer B13, and is disposed along one side y2 in the feeding direction, thereby connecting the buffer layer B4 to one side y2 of the first surface A1. In other words, in this embodiment, the first gluing unit 50 applies glue in the manner corresponding to the gluing area D in the first embodiment, as shown in Figure 8d.

[0105] As shown in FIG15 , after the first surface A1 and the buffer layer B4 are connected, a buffer sheet C4 is formed, in which one side y2 along the feeding direction of the buffer sheet is fixed to each other, and the other side y3 along the feeding direction is in an unfixed separated state.

[0106] The width of the slit paper B3 and the third surface A3 perpendicular to the feeding direction is less than the width of the first surface A1. When the third surface A3 moves toward the other side y3 of the first surface A1, the folds A31 on the third surface A3 unfold, simultaneously moving the slit paper B13 connected to the third surface A3, thereby stretching the slit paper B13. The stretched slit paper B13 forms a three-dimensional grid structure, thus providing cushioning properties.

[0107] Among them, the buffer sheet C4 is a planar structure before the slit paper B13 is stretched. When the slit paper B13 in the buffer sheet C4 is stretched, the thickness increases; therefore, the buffer sheet C4 in this embodiment is a planar structure during transportation and storage, which can reduce transportation costs; when in use, the slit paper B13 can be stretched by pushing the third surface A3, thereby becoming a three-dimensional structure, which is used to play a buffering role and wrap items.

[0108] Furthermore, packaging bags can also be produced using the cushioning sheet C4 in this embodiment.

[0109] Implementation Method Five

[0110] In this embodiment, the buffer sheet production module 100 is improved on the basis of the fourth embodiment to produce a buffer sheet C5.

[0111] The produced buffer sheet C5 is shown in FIG16 . Referring to FIG17 , the buffer sheet C5 produced in this embodiment differs from the buffer sheet C4 in the fourth embodiment only in the buffer layer B5. The difference in the buffer layer B5 is that the third surface A3 is not provided with a fold A31, and the third surface A3 is connected only to one side edge y11 of the slit paper B13 along the feeding direction, while the other side of the third surface A3 along the feeding direction is not connected to the slit paper B13. At the same time, the buffer sheet C5 also includes a fourth surface A4, which is connected only to the other side edge y12 of the slit paper B13 along the feeding direction, while the other side of the fourth surface A4 along the feeding direction is not connected to the slit paper B13. The side of the third surface A3 not connected to the slit paper B13 and the side of the fourth surface A4 not connected to the slit paper B13 are stacked on each other and are not connected, forming an overlapping area Z.

[0112] When the third surface A3 moves toward the other side y3 of the first surface A1, the overlapping area Z is expanded, and at the same time, the slit paper B13 connected to the third surface A3 is driven to move, so that the slit paper B13 is stretched. The stretched slit paper B13 forms a three-dimensional grid structure, thereby having a cushioning performance.

[0113] Among them, the buffer sheet C5 is a planar structure before the slit paper B13 is stretched. When the slit paper B13 in the buffer sheet C5 is stretched, the thickness increases; therefore, the buffer sheet C54 in this embodiment is a planar structure during transportation and storage, which can reduce transportation costs; when in use, the slit paper B13 can be stretched by pushing the third surface A3, thereby becoming a three-dimensional structure, which is used to play a buffering role and wrap items.

[0114] Furthermore, packaging bags can also be produced using the cushioning sheet C5 in this embodiment.

[0115] Therefore, the buffer sheet production module 100 in this embodiment further includes: a fourth unwinding unit 11a, which is used to unwind the fourth surface A4. The fourth surface A4 partially overlaps the third surface A3, forming an overlapping area Z. The overlapping area Z is unwound synchronously with the third and fourth surfaces A3 and A4. The width of the unwound third and fourth surfaces A3, after overlapping, perpendicular to the feeding direction is less than the width of the first surface A1. The slit paper B13 is also in an unstretched state and is fixed to the side edge y12 of the third surface A3 and the side edge y11 of the fourth surface A4. Simultaneously, the first gluing unit 50 continues to gluing the first surface A1 or the slit paper A13 in the manner described in the gluing area D of the first embodiment.

[0116] Implementation Method 6

[0117] As shown in Figures 19 and 20, this embodiment is improved on the basis of the fourth or fifth embodiment, and is different from the fourth or fifth embodiment in that the buffer sheet production module 100 is used to produce the buffer sheet C6, and the buffer sheet production module 100 also includes a slit paper cutting unit 12a.

[0118] The slit paper cutting unit 12a is provided at the front end of the paper pressing unit 30 in the feeding direction. The slit paper cutting unit 12a rolls and cuts the slit paper B13 at intervals while feeding. The cutting position is perpendicular to the feeding direction.

[0119] In this embodiment, glue is provided on both ends of the slit paper B13 relative to the third surface A3, or on the third surface A3 relative to the slit paper B13, along the feeding direction, and glue is provided on one end of the slit paper relative to the first surface, or on the first surface relative to the slit paper, along the feeding direction.

[0120] Among them, the cut slit paper B13 forms a first end x1 and a second end x2 in the order of cutting, and the cut slit paper B13 is sequentially fed to the paper pressing unit 30 from the first end x1 to the second end x2, and the paper pressing unit 30 fixes the slit paper B13 on both sides along the feeding direction on the third surface A3 during the feeding process, and a gap S is formed at a position on the first surface A1 that is not covered with the slit paper B13 and is perpendicular to the feeding direction, and there are multiple gaps S, and the multiple gaps S are arranged at intervals along the feeding direction of the first surface A1, and at least two adjacent gaps S are provided with the cut slit paper B13; that is, after the slit paper cutting unit 12a cuts the slit paper B13, the two sides of the slit paper B13 are sequentially fixed on the third surface A3, and then the slit paper is cut. Unit 12a continues to cut the slit paper B13 and accelerates the feeding of the re-cut slit paper B13, so that the re-cut slit paper B13 overlaps with the last cut slit paper B13 in at least a part of the area to form an overlapping area D, and then as the feeding continues, the re-cut slit paper B13 is fixed on the third side A3 in the same manner as the last cut slit paper B13, and finally the slit paper cutting unit 10a cuts the slit paper B13 again, and the cutting position of the cut slit paper B13 is opposite to the gap S as the slit paper B13 and the first side A1 continue to be fed; when the re-cut slit paper B13 moves to the gap S, the slit paper unwinding unit 10a reduces the feeding speed, and as the first side A1 is fed, after reserving the gap S on the first side A1, it returns to the same feeding speed as the first side A1.

[0121] Specifically, the first unwinding unit has a first feeding rate a; the slit paper unwinding unit has a variable second feeding rate b, the second feeding rate b includes a rate b1, a rate b2 and a rate b3, the rate b2 is the same as the first feeding rate b, the rate b1 is less than the first feeding rate b, and the rate b3 is greater than the first feeding rate b; when the first end x1 of the cut slit paper B13 is located at the cut-off position of the interval S, the slit paper unwinding unit 10a feeds the slit paper B13 at a rate b2, so that the slit paper B13 is fed synchronously with the first surface A1; when the second end x2 of the cut slit paper B13 is fed between two adjacent intervals S, the slit paper unwinding unit 10a feeds the slit paper B13 at a rate b3. 13. The first end x1 of the slit paper B13 fed at a rate b3 overlaps with the second end x2 of the last slit paper B13 that was cut. After the slit paper B13 overlaps, the slit paper unwinding unit 10a continues to feed the slit paper B13 at a rate b2 until the second end x2 of the next cut slit paper B13 is located at the starting position of another adjacent interval S. The slit paper unwinding unit 10a feeds the slit paper B13 at a rate b1 so that the second end x2 of the next slit paper B13 is located at the end position of the interval S relative to the first surface A1. The slit paper unwinding unit 10a feeds the slit paper B13 again at a rate b2, thereby forming two partially overlapping slit papers B13 in two adjacent intervals S on the first surface A1.

[0122] In this embodiment, the paper pressing unit 30 is used to roll and clamp the first side A1 and the slit paper B13 at the position where the glue is set, and roll and clamp the third side A3 and the slit paper B13 at the position where the glue is set to fix the two side ends of the third side A3 and the slit paper B13.

[0123] In this embodiment, when there is also a fourth surface A4 of embodiment five, one side of the slit paper B13 on both sides along the feeding direction is fixed to the side of the third surface A3, and the other side of the slit paper B13 on both sides along the feeding direction is fixed to one side of the fourth surface A4, so that the slit paper B13 completely covers the third surface A3 and the fourth surface A4, forming the buffer sheet C6.

[0124] In this embodiment, since the slit paper B13 is fixed to the third surface A3 and / or fourth surface A4 in an unstretched state, when the slit paper B13 is stretched perpendicular to the feed direction, forming a three-dimensional grid structure, the length perpendicular to the feed direction increases, but the width of the slit paper B13 along the feed direction decreases. When two superimposed slit paper B13 are used to form the buffer unit B0, even after the slit paper B13 is stretched into a three-dimensional grid structure, the loss in the width direction is minimized, ensuring that the buffer unit B0 can maximize its coverage area and improve its buffering capacity.

[0125] Implementation Method Seven

[0126] As shown in Figure 21 and Figures 24 to 27, the present invention also discloses a packaging bag making device 200, which includes two buffer sheet making modules 100, and the buffer sheet making modules 100 are used to make at least one buffer sheet (C1, C2, C3) in embodiments one to three. The buffer sheets (C1, C2, C3) made by the two buffer sheet making modules 100 are respectively a first sheet C11 and a second sheet C12, the first sheet C11 and the second sheet C12 are the same, and the first sheet C11 and the second sheet C12 are opposite to each other and fed synchronously.

[0127] "Opposite to each other" means that the first surface A1 of the first sheet C11 and the first surface A1 of the second sheet C12 are respectively located on the outside, and the buffer unit B0 of the first sheet C11 and the buffer unit B0 of the second sheet are both located between the first surface A1 of the first sheet C11 and the first surface A1 of the second sheet C12, thereby ensuring that the bag body of the manufactured packaging bag 300 is the first surface A1, and the buffer unit B0 is located inside the packaging bag 300.

[0128] The packaging bag making device 200 further includes:

[0129] A first bag-forming glue-applying unit 21 is used to apply glue to the surface of the first sheet C11 and / or the second sheet C12 facing the second sheet C12 or the first sheet C11. The positions where the first bag-forming glue-applying units 21 apply glue are arranged at intervals and perpendicular to the feeding direction. The positions where the first bag-forming glue-applying units 221 apply glue correspond to the interval S between the first sheet C11 and the second sheet C12. The buffer layer (B1, B2, B3) of the first sheet C11 is opposite to the buffer layer (B1, B2, B3) of the second sheet C12.

[0130] The first bag forming and pressing unit 22 is used for rolling and pressing the first sheet C11 and the second sheet C12 together, and pressing the first sheet C11 and the second sheet C12 together at a position corresponding to the interval S, thereby forming two side edges of the packaging bag.

[0131] The packaging bag making device 200 further includes:

[0132] a second bag-forming glue-applying unit 23, which is further used to apply glue to the surface of the first sheet C11 and / or the second sheet C12 facing the second sheet C12 or the first sheet C11. The second bag-forming glue-applying unit 23 applies glue continuously along the feeding direction and is located on one side of the first sheet C11 along the feeding direction.

[0133] The second bag forming and pressing unit 24 is used for rolling and pressing the first sheet C11 and the second sheet C12 together, and pressing the first sheet C11 and the second sheet C12 together at the position where the second bag forming and gluing unit 23 applies glue, thereby forming the bottom of the packaging bag.

[0134] In this embodiment, the first bag-forming and laminating unit 22 only laminates the first and second sheets C11 and C12 relative to the spacing S to form the side edges of the packaging bag 300. The side edges of the packaging bag 300 do not include the buffer layers (B1, B2, B3). Therefore, preheating and prolonged laminating are not required during laminating, maximizing the feed rate a and improving production efficiency. Furthermore, the packaging bag making apparatus 200 is compatible with various buffer layer (B1, B2, B3) structures, allowing the production of packaging bags 300 with a variety of different structures.

[0135] In this embodiment, the second bag forming and pressing unit 24 can directly press and fix the first sheet C11 and the second sheet C12 on a side along the feeding direction to form a bag bottom. The produced packaging bag 300 forms a side at the interval S and forms a bag bottom on a side along the feeding direction. The first bag forming and gluing unit 21, the first bag forming and pressing unit 22, the second bag forming and gluing unit 23 and the second bag forming and pressing unit 24 all work during the feeding process of the first sheet C11 and the second sheet C12. The production of the first sheet C11 and the second sheet C12 is also in a continuous and uninterrupted feeding process. Therefore, when feeding the first surface A1, the second surface A2, the buffer layer B1, the buffer layer B2, the buffer layer B3 and the slit paper B, the first sheet C11 and the second sheet C12 are produced while feeding continuously and uninterruptedly. At the same time, the packaging bag is produced synchronously using the first sheet C11 and the second sheet C12, which can maximize the production efficiency.

[0136] In this embodiment, the bottom of the packaging bag 300 can be made in another way. Specifically, the packaging bag making equipment further includes:

[0137] The bottom turning unit 25 is provided at the rear end of the second bagging and gluing unit 23, and is used to fold the first sheet C11 or the second sheet C12 at the location where the second bagging and gluing unit 23 has applied glue, so as to wrap the edge of the other second sheet C12 or the first sheet C11;

[0138] The second bag forming and pressing unit 24 is used to press the first sheet material C11 and the second sheet material C12 at the folded position to form the bottom of the packaging bag.

[0139] In other words, the bottom of the packaging bag 300 is not formed by directly laminating the first and second sheets C11, C12, along one side along the feeding direction. Instead, the first or second sheet C11, C12, is glued to the side, folded, and a portion of the first or second sheet C11, C12, is used to wrap around the second or first sheet C11 before laminating. Compared to directly laminating the side edges of the first and second sheets C11, C12 without folding to form the bottom, this method allows the packaging bag to have a deeper insertion depth, thereby increasing the internal space of the packaging bag 300.

[0140] In this embodiment, the packaging bag making equipment 200 further includes a bag trimming unit 26. The bag trimming unit 26 is used to trim the formed packaging bags 300 perpendicular to the feeding direction. The trimming position is located at the side of two adjacent packaging bags 300, that is, at the position of each interval S. In this embodiment, the bag trimming unit 26 also uses a rolling cutting method, contacting the packaging bags 300 only at the interval S, thereby avoiding affecting the buffer layer (B1, B2, B3) between the two intervals S and reducing its buffering effect. In addition, the rolling cutting can also be coordinated with the feeding rate of the first sheet C11 or the second sheet C12 to achieve high-speed cutting and improve production efficiency.

[0141] In this embodiment, the first bag pressing unit 22 and the second bag pressing unit 24 are similar in structure to the rolling unit 80 in the second embodiment corresponding to Figure 12, and the bag cutting unit 26 is similar in structure to the cutting unit 40 in the first embodiment corresponding to Figure 7, both of which adopt rolling pressing and rolling cutting methods.

[0142] The first sheet C11 and the second sheet C12 are fed at the same rate as the first surface A1 in the production module 100, both at rate a. That is, in this production equipment 200, the production and feeding of the buffer layer (B1, B2, B3) are carried out at a variable rate b, while the feeding of the first surface A1 and the second surface A2 is carried out at rate a. The entire buffer sheet production module 100 and the packaging bag production equipment 200 having two buffer sheet production modules 100 are completed on the same machine. The entire machine can complete the production of the packaging bag 300 by feeding at rate a. This can, on the one hand, integrate multiple production processes onto one machine, reducing the time and material costs of transporting raw materials and the first and second sheets C11 and C12. On the other hand, it can improve production efficiency while reducing the spatial dimensions of the entire production equipment 200.

[0143] Implementation Method Eight

[0144] Referring to Figures 22 to 26, the packaging bag making equipment of the present invention is improved on the basis of embodiment seven, wherein the packaging bag making equipment 200 in this embodiment includes two buffer sheet making modules 100, and the buffer sheet making modules 100 are used to make at least one buffer sheet (C4, C5, C6) in embodiments four to six. The buffer sheets (C4, C5, C6) made by the two buffer sheet making modules 100 are respectively a first sheet C21 and a second sheet C22, the first sheet C21 and the second sheet C22 are the same, and the first sheet C21 and the second sheet C22 are opposite to each other and fed synchronously.

[0145] "Opposite to each other" means that the first surface A1 of the first sheet C21 and the first surface A1 of the second sheet C22 are respectively located on the outside, and the buffer unit B0 of the first sheet C21 and the buffer unit B0 of the second sheet are both located between the first surface A1 of the first sheet C21 and the first surface A1 of the second sheet C22, thereby ensuring that the bag body of the manufactured packaging bag 300 is the first surface A1, and the buffer unit B0 is located inside the packaging bag 300.

[0146] The packaging bag making device 200 further includes the following on the basis of the seventh embodiment:

[0147] The slit paper gluing unit 27 is used to apply glue to the side edge of the slit paper B31 in the first sheet C21 and / or the second sheet C22 that is not connected to the first surface A1, so as to fix the two buffer layers B0 in the first sheet C21 and the second sheet C22 when making the packaging bag 300. The two buffer layers B0 are stacked up and down and opposite to each other, and the fixed position is located at the side edge of the two buffer layers B0 that is not connected to the first surface A1.

[0148] In this embodiment, the two buffer layers B0 of the first and second sheets C21 and C22 are fixed as described in this embodiment. Furthermore, the first and second sheets C21 and C22 are fixed at two intervals S to form the sides of the packaging bag 300 as described in Embodiment 7. The first surfaces A1 of the two buffer sheets (C21, C22) are then fixed to each other along one side of the feeding direction. This completes the bottom of a novel prefabricated packaging bag 300.

[0149] In this embodiment, the production equipment 200 also includes a bag bottom fixing gluing unit 28, which is used to apply glue to the surface of the slit paper B13 facing the first surface A1. The glue application position is located along the feeding direction of the slit paper B13 and on the side edge that is not fixed to the first surface A1. The bag bottom fixing gluing unit 28 is used to fix the slit paper B13 at the bottom position of the packaging bag formed by the first surface A1 after the slit paper B13 is stretched to prevent the slit paper B13 from rebounding.

[0150] The buffer sheet production module of the present invention does not have a buffer layer or slit paper at the fixed pressing position, that is, the position of the interval S and, so it does not require long-term pressing and heating. It adopts rolling production and continuous feeding method, and there is no step-by-step pressing and feeding stop, which is conducive to improving production efficiency and can reach a feeding production rate of 100m-150m per minute. Compared with the existing step-by-step feeding production, the production efficiency is greatly improved.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A buffer sheet manufacturing module, characterized in that: The production module comprises: A first unwinding unit, used for unwinding the first surface and feeding the first surface continuously along an unwinding direction; A buffer layer feeding unit, used for continuously feeding the buffer layer along a feeding direction, wherein the buffer layer is located on one side of the first surface; glue for bonding the first surface and the buffer layer is applied on a surface of the buffer layer and / or the first surface facing the other first surface or the buffer layer; A paper pressing unit, the paper pressing unit is used to roll and clamp the first surface and the buffer layer at a position where glue is set on the first surface and / or the buffer layer to adhere the first surface and the buffer layer, so as to fix the first surface and the buffer layer; A cutting unit, the cutting unit is arranged at the front end of the paper pressing unit in the feeding direction, and the cutting unit rolls and cuts the buffer layer at intervals while feeding, and the cutting position is perpendicular to the feeding direction; The buffer layer is separated into buffer units after cutting, and each buffer unit forms a first end and a second end according to the order of cutting. The buffer units are sequentially sent to the paper pressing unit from the first end to the second end, and are clamped together with the first surface by the paper pressing unit and fixed to the first surface. The first unwinding unit has a first feeding rate a; the buffer layer feeding unit has a variable second feeding rate b, the second feeding rate b includes a rate b1 and a rate b2, the rate b2 is the same as the first feeding rate, and the rate b1 is less than the first feeding rate b; A gap S is formed on the first surface between the first end of the buffer layer after being cut and the second end of the previous buffer layer after being cut; after the cutting unit cuts the buffer layer, the buffer layer is continuously fed to the feeding unit at the rate b1 which is less than the first feeding rate a until the buffer layer reserves the gap S relative to the first surface, and the first end is fixed on the first surface and then continuously and synchronously fed with the first surface at the rate b2.

2. The buffer sheet manufacturing module according to claim 1, characterized in that: The production module includes a first gluing unit, which is used to continuously apply glue for bonding the first surface and the buffer layer to the buffer layer and / or the first surface on a surface facing the other first surface or buffer layer. The position where the first gluing unit applies glue is located on the first surface or the buffer layer and on at least one side along the feeding direction.

3. The buffer sheet manufacturing module according to claim 2, characterized in that: The production module also includes: A second unwinding unit is used for unwinding the second surface, the first surface and the second surface are fed synchronously and continuously, and the buffer layer is located between the first surface and the second surface; x) glue is disposed on the surface of the second surface facing the first surface and at a position spaced S from the first surface, or, y) glue is disposed on the surface of the first surface facing the second surface and at a position spaced S from the first surface; a rolling unit, the rolling unit being used to roll and press the first surface and the second surface together at the spaced S relative to each other, Thereby, the first surface and the second surface are fixed in a direction perpendicular to the feeding direction, and the cut buffer layer is located between two adjacent intervals S and is wrapped by the first surface and the second surface.

4. The buffer sheet manufacturing module according to claim 3, characterized in that: The production module also includes: The second gluing unit is used to continuously apply glue to the surface of the second surface facing the first surface, and the gluing position is along at least one side of the feeding direction, so as to connect the first surface and the second surface in the feeding direction.

5. The buffer sheet manufacturing module according to claim 4, characterized in that: The buffer layer includes at least one layer of padding, and the padding includes at least one of a corrugated paper structure, a concave-convex structure, a plastic bubble film, and a three-dimensional hexagonal grid structure after slit paper is stretched.

6. The buffer sheet manufacturing module according to claim 5, characterized in that: The buffer layer has multiple layers of pads, the production module includes multiple cutting units and multiple first gluing units, the buffer layer feeding unit includes multiple pad feeding units, the pad feeding units, the first gluing units, the cutting units and the pads are the same in number, each pad feeding unit is used to feed a layer of the pad; at least one of the gluing units is used to continuously apply glue to the surface of the pad on one side facing the other layer, and the gluing position is along at least one side of the feeding direction; each of the cutting units is used to cut a layer of the pad, and multiple layers of the pads are stacked up and down and fed continuously and synchronously; Wherein, after being cut, one layer of the liner is connected with another adjacent layer of the liner at a continuous gluing position.

7. The buffer sheet manufacturing module according to claim 2, characterized in that: The buffer layer unwinding unit further comprises: A third unwinding unit is used for unwinding a third surface and feeding the third surface continuously along an unwinding direction, wherein the third surface is provided with a plurality of wrinkles along the unwinding direction; A slit paper unwinding unit, used for unwinding the slit paper so that the slit paper is continuously fed along an unwinding direction, wherein the slit paper is located between the first surface and the third surface; Among them, the slit paper and the third surface are unwound synchronously, and the slit paper and the third surface are connected to each other on both sides along the feeding direction; the width of the slit paper and the third surface perpendicular to the feeding direction is smaller than the width of the first surface; the slit paper and the third surface are connected to form the buffer layer; the glue applied by the first gluing unit is only located on one side of the feeding direction, so that the buffer layer is connected on one side of the first surface.

8. A packaging bag making device, characterized in that: The packaging bag making equipment comprises two buffer sheet making modules, which are used to make buffer sheets. The buffer sheets made by the two buffer sheet making modules are respectively a first sheet and a second sheet. The first sheet and the second sheet are the same. The first sheet and the second sheet are opposite to each other and are fed synchronously. The buffer sheet manufacturing module comprises: A first unwinding unit, used for unwinding the first surface and feeding the first surface continuously along an unwinding direction; A buffer layer feeding unit, used for continuously feeding the buffer layer along a feeding direction, wherein the buffer layer is located on one side of the first surface; glue for bonding the first surface and the buffer layer is applied on a surface of the buffer layer and / or the first surface facing the other first surface or the buffer layer; A paper pressing unit, the paper pressing unit is used to roll and clamp the first surface and the buffer layer at a position where glue is set on the first surface and / or the buffer layer to adhere the first surface and the buffer layer, so as to fix the first surface and the buffer layer; A cutting unit, the cutting unit is arranged at the front end of the paper pressing unit in the feeding direction, and the cutting unit rolls and cuts the buffer layer at intervals while feeding, and the cutting position is perpendicular to the feeding direction; The buffer layer after cutting forms a first end and a second end in the order of cutting, and the buffer layer after cutting is sequentially sent to the paper pressing unit from the first end to the second end, and is clamped together with the first surface by the paper pressing unit and fixed to the first surface; The first unwinding unit has a first feeding rate a; the buffer layer feeding unit has a variable second feeding rate b, the second feeding rate b includes a rate b1 and a rate b2, the rate b2 is the same as the first feeding rate b, and the rate b1 is less than the first feeding rate b; A gap S is formed between the first end of the cut buffer layer and the second end of the previous cut buffer layer on the first surface; after the cutting unit cuts the buffer layer, the buffer layer feeding unit continuously feeds the buffer layer at the rate b1 which is less than the first feeding rate a until the buffer layer reserves the gap S relative to the first surface, and the first end is fixed on the first surface and then continuously and synchronously fed with the first surface at the rate b2; The packaging bag making equipment also includes: A first bag-forming glue-applying unit is used to apply glue to the first sheet and / or the second sheet on the surface facing the other second sheet or the first sheet, the positions where the first bag-forming glue-applying unit applies glue are arranged at intervals and are perpendicular to the feeding direction, the positions where the first bag-forming glue-applying unit applies glue correspond to the interval S between the first sheet and the second sheet, and the buffer layer of the first sheet is opposite to the buffer layer of the second sheet; The first bag forming and pressing unit is used for rolling and pressing the first sheet and the second sheet together, and pressing the first sheet and the second sheet together at a position corresponding to the interval S, so as to form two side edges of the packaging bag.

9. The packaging bag making equipment according to claim 8, characterized in that: The packaging bag making equipment also includes: A second bag-forming glue-applying unit, the second bag-forming glue-applying unit is further used to apply glue on the surface of the first sheet and / or the second sheet facing the second sheet or the first sheet, the glue-applying position of the second bag-forming glue-applying unit is continuous along the feeding direction and is located at a side along the feeding direction relative to the first sheet; The second bag forming and pressing unit is used for rolling and pressing the first sheet and the second sheet, and pressing the first sheet and the second sheet to each other at the position where the second bag forming and gluing unit glues, so as to form the bottom of the packaging bag.

10. The packaging bag making equipment according to claim 9, characterized in that: The packaging bag making equipment also includes: A bottom turning unit, arranged at the rear end of the second bagging and gluing unit, is used to turn over the first sheet or the second sheet at the glue-applying position of the second bagging and gluing unit, so as to wrap the edge of another second sheet or the first sheet; The second bag forming and pressing unit is used for pressing the first sheet material and the second sheet material at the folded position to form the bottom of the packaging bag.

11. The packaging bag making equipment according to claim 8, characterized in that: The production module includes a first gluing unit, which is used to continuously apply glue for bonding the first surface and the buffer layer to the buffer layer and / or the first surface on a surface facing the other first surface or buffer layer. The position where the first gluing unit applies glue is located on the first surface or the buffer layer and on at least one side along the feeding direction.

12. The packaging bag making equipment according to claim 11, characterized in that: The production module also includes: A second unwinding unit is used for unwinding the second surface, the first surface and the second surface are fed synchronously and continuously, and the buffer layer is located between the first surface and the second surface; x) glue is disposed on the surface of the second surface facing the first surface and at a position relative to the interval S on the first surface, or, y) glue is disposed on the surface of the first surface facing the second surface and at a position relative to the interval S on the first surface; a rolling unit, the rolling unit being used to roll and press the first surface and the second surface together at the interval S relative to each other, thereby fixing the first surface and the second surface perpendicular to the feeding direction, and the cut buffer layer is located between two adjacent intervals S and is wrapped by the first surface and the second surface.

13. The packaging bag making equipment according to claim 12, characterized in that: The production module also includes: The second gluing unit is used to continuously apply glue to the surface of the second surface facing the first surface, and the gluing position is along at least one side of the feeding direction, so as to connect the first surface and the second surface in the feeding direction.

14. The packaging bag making equipment according to claim 12, characterized in that: The buffer layer includes at least one layer of padding, and the padding includes at least one of a corrugated paper structure, a concave-convex structure, a plastic bubble film, and a three-dimensional hexagonal grid structure after slit paper is stretched.

15. The packaging bag making equipment according to claim 14, characterized in that: The buffer layer has multiple layers of pads, the production module includes multiple cutting units and multiple second gluing units, the buffer layer feeding unit includes multiple pad feeding units, the pad feeding units, the second gluing units, the cutting units and the pads are the same in number, each pad feeding unit is used to feed a layer of the pad; each gluing unit is used to continuously apply glue to the surface of the pad on one side facing the other layer, and the gluing position is along at least one side of the feeding direction; each cutting unit is used to cut a layer of the pad, and multiple layers of the pads are stacked up and down and fed continuously and synchronously; Wherein, after being cut, one layer of the liner is connected with another adjacent layer of the liner at a continuous gluing position.

16. The packaging bag making equipment according to claim 15, characterized in that: The buffer layer unwinding unit further comprises: A third unwinding unit, used for unwinding a third surface and feeding the third surface continuously along an unwinding direction, wherein the third surface is provided with a plurality of folds perpendicular to the unwinding direction; A slit paper unwinding unit, used for unwinding the slit paper so that the slit paper is continuously fed along an unwinding direction, wherein the slit paper is located between the first surface and the third surface; Among them, the slit paper and the third surface are unwound synchronously, and the slit paper and the third surface are connected to each other on both sides perpendicular to the feeding direction; the width of the slit paper and the third surface perpendicular to the feeding direction is smaller than the width of the first surface; the slit paper and the third surface are connected to form the buffer layer; the glue applied by the first gluing unit is only located on one side of the feeding direction, so that the buffer layer is connected on one side of the first surface.

17. A buffer sheet manufacturing module, characterized in that: The production module comprises: A first unwinding unit, used for unwinding the first surface and feeding the first surface continuously along an unwinding direction; A third unwinding unit, used for unwinding a third surface and feeding the third surface continuously along an unwinding direction, wherein the third surface is provided with a plurality of folds perpendicular to the unwinding direction; a slit paper unwinding unit, used for unwinding the slit paper so that the slit paper is continuously fed along the unwinding direction, the slit paper being located between the first surface and the third surface; glue is provided on both side ends of the slit paper relative to the third surface, or on the third surface relative to the slit paper, along the feeding direction; and glue is provided on one side end of the slit paper relative to the first surface, or on the first surface relative to the slit paper, along the feeding direction; A paper pressing unit, the paper pressing unit is used to roll and clamp the first side and the slit paper at the position where the glue is set, and fix the third side and the slit paper at both ends; A cutting unit, the cutting unit is arranged at the front end of the paper pressing unit in the feeding direction, and the cutting unit rolls and cuts the slit paper at intervals while feeding, and the cutting position is perpendicular to the feeding direction; The cut slit paper forms a first end and a second end in the order of cutting, the cut slit paper is sequentially fed to the paper pressing unit from the first end to the second end, and both ends of the slit paper are fixed on the third surface, the first surface is not covered with the slit paper and a gap S is formed perpendicular to the feeding direction area, the gap S has a plurality of gaps, and the plurality of gaps S are arranged at intervals along the feeding direction of the first surface, and after the slit is fixed on the first surface, at least two cut slit papers are arranged between two adjacent gaps S; The first unwinding unit has a first feeding rate a; the slit paper unwinding unit has a variable second feeding rate b. The second feeding rate b includes a rate b1, a rate b2 and a rate b3, the rate b2 is the same as the first feeding rate b, the rate b1 is less than the first feeding rate b, and the rate b3 is greater than the first feeding rate b; When the first end of the cut slit paper is located at the cut-off position of the interval S, the slit paper unwinding unit feeds the slit paper at a rate b2, so that the slit paper is fed synchronously with the first surface; when the second end of the cut slit paper is fed between two adjacent intervals S, the slit paper unwinding unit feeds the slit paper at a rate b3, and the first end of the slit paper fed at the rate b3 overlaps with the second end of the last slit paper cut; after the slit paper overlaps, the slit paper unwinding unit continues to feed the slit paper at a rate b2 until the second end of the next cut slit paper is located at the starting position of another adjacent interval S, the slit paper unwinding unit feeds the slit paper at a rate b1, so that the second end of the next slit paper is located at the cut-off position of the interval S relative to the first surface, and the slit paper unwinding unit feeds the slit paper again at a rate b2, thereby forming two partially overlapping slit papers in the two adjacent intervals S on the first surface.

18. A packaging bag making device, characterized in that: It comprises two buffer sheet production modules as described in claim 17, wherein the two buffer sheet production modules produce two pieces of the buffer sheets, the two pieces of the buffer sheets are synchronously fed with the third surfaces facing each other, and are pressed and bonded to each other at the interval S.

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