CN216993275U - Four-edge sealing packaging bag production line - Google Patents

Abstract

The utility model discloses a production line of four-edge sealed packaging bags, which comprises an upper film conveying mechanism, a lower film edge folding mechanism, an overlapping mechanism, a longitudinal heat sealing mechanism, a longitudinal side trimming mechanism, a transverse heat sealing mechanism and a transverse cutting mechanism which are sequentially arranged. In the processing of the four-edge sealed package bag, the upper film in a separated state is directly placed on the folded edge of the organ on the lower film, so that the positioning is accurate, the forced deflection is avoided in the processing, and the problems that the pulling force is large and the folded edge of the organ is easy to pull and deform when the film is folded upwards by a traditional structure are solved. Therefore, the qualification rate of the four-edge-sealed packaging bag is greatly improved, the processing efficiency is improved, the production cost is reduced, and the method can be widely applied to the technical field of production and processing of the four-edge-sealed packaging bag.

Description

Four-edge sealing packaging bag production line

Technical Field

The utility model relates to the field of packaging bag processing equipment, in particular to a four-edge sealing packaging bag production line.

Background

The four-edge sealed packaging bag is used as a common structural form of the packaging bag, and is convenient to erect due to good structural strength, so that the four-edge sealed packaging bag is widely used in various industries.

The four-edge sealed package bag is mainly characterized in that two sides of the package bag are provided with harmonica folded edges, most of the existing four-edge sealed package bags are formed by folding a whole film in half through the folded edges, for example, the utility model with the name of Chinese patent application number of 201811376310.8 is a manufacturing method of a four-edge sealed self-standing package bag and a four-edge sealed package bag, namely, one side of a film material and a position close to the middle position are folded to form two organ folded edges, and then the redundant film material part outside the folded edge of the middle organ is folded upwards, so that the side edge of the partial film material covers the organ folded edge of the other side. Although the existing mode is convenient and trouble-saving, and can produce the four-edge-sealed packaging bag by directly guiding the positive film material into a machine, the mode can not well fix the accordion folding edge connected with the film material when the film material is folded upwards, the accordion folding edge is very easy to deform when the film material is folded, particularly the four-edge-sealed packaging bag with large size is easy to deform, the probability of deformation is higher due to large required pulling force, the rejection rate of products is increased, and the rejection rate of the mode is up to 30% according to statistics. In addition, there is another method of separately manufacturing the upper sheet, the lower sheet and the accordion folding edge of the four-edge-sealed package bag and then performing heat sealing by using equipment, and this method also has a problem that the accordion folding edge is not easy to be positioned, so that the rejection rate is high, and therefore, a production line needs to be designed to improve the yield of the four-edge-sealed package bag.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a four-edge-sealed packaging bag production line which is used for continuously processing four-edge-sealed packaging bags and solves the problem that the existing four-edge-sealed packaging bags are high in continuous processing rejection rate.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a four edge sealing wrapping bag production line for continuous processing four edge sealing wrapping bags includes: a machine frame, a plurality of guide rails and a plurality of guide rails,

the upper membrane material conveying mechanism is arranged on the rack and intermittently conveys the upper membrane material along the length direction of the upper membrane material;

the lower membrane material conveying mechanism is arranged on the rack and used for conveying the lower membrane material intermittently along the length direction of the lower membrane material;

the lower film material folding mechanism is arranged on the rack and folds two side edges of the lower film material, so that organ folding edges are formed on two sides of the lower film material;

the folding mechanism is arranged on the frame, and folds the upper film material on the lower film material after the edge folding so that the side edge of the upper film material is superposed with the edge of the edge folding of the organ;

the longitudinal heat sealing mechanism is arranged on the rack, seals the upper film and the organ hems on the two sides of the lower film, and seals the corner parts of the lower film, which are connected with the organ hems;

the longitudinal side trimming mechanism is arranged on the rack and is used for cutting off the outer side waste edges at the longitudinal sealing position to ensure that the two sides of the upper film and the lower film after sealing are neat;

the transverse heat sealing mechanism is arranged on the rack and used for transversely heat sealing the upper film and the lower film according to a set position;

and the transverse cutting mechanism is arranged on the frame and cuts one side of the transverse heat sealing position to form the four-edge sealing packaging bag with an independent single-side opening.

In order to facilitate the transmission of the membrane material, the upper membrane material conveying mechanism comprises an upper membrane intermittent material pulling device, and the lower membrane material conveying mechanism comprises a lower membrane intermittent material pulling device; the upper film intermittent drawing device comprises a swing frame which is rotatably installed on a rack, a first drawing roller and a second drawing roller are arranged on the swing frame in parallel, a fixed roller is also arranged on the rack, the fixed roller is positioned between the first drawing roller and the second drawing roller and is higher than the first drawing roller and the second drawing roller, and a swing frame driving device for driving the swing frame to swing is also arranged; the structure of the lower film intermittent material pulling device is the same as that of the upper film intermittent material pulling device.

In order to fold and form an organ hem, the lower film material hemming mechanism comprises a supporting plate arranged on the frame, hemming plates are symmetrically arranged on two sides of the supporting plate and are lower than the supporting plate, a hemming forming part extending into the lower portion of the supporting plate is arranged on one side, matched with the supporting plate, of each hemming plate, and a forming roller is further arranged below each hemming plate; a material pressing roller is further arranged above the supporting plate.

In order to overlap the side edge of an upper film material on the organ folding edge of a lower film material passing through the lower film material, the overlapping mechanism comprises an upper overlapping roller and a lower overlapping roller, a material pulling adjusting device is arranged between the lower film material folding mechanism and the overlapping mechanism, the material pulling adjusting device comprises an adjusting swing frame rotatably mounted on a rack, a first material pulling adjusting roller and a second material pulling adjusting roller are arranged on the adjusting swing frame in parallel, an adjusting fixed roller is also arranged on the rack, the adjusting fixed roller is positioned between the first material pulling adjusting roller and the second material pulling adjusting roller and is higher than the first material pulling adjusting roller and the second material pulling adjusting roller, and an adjusting swing frame driving device for driving the adjusting swing frame to swing is also arranged; a set of adjusting strips are installed along the circumferential direction on the first material pulling adjusting roller, the second material pulling adjusting roller and the adjusting fixing roller, the tops of the adjusting strips are arc surfaces, and adjusting gaps are formed between every two adjacent adjusting strips.

In order to prevent the upper and lower films from being staggered when being overlapped, the upper film conveying mechanism and the lower film conveying mechanism are both provided with film conveying and positioning devices; and the film material conveying and positioning device is provided with an infrared probe for detecting a positioning point on the film material.

In order to seal the upper and lower films with the four contact edges of the accordion folding edges, the longitudinal heat-sealing mechanism comprises longitudinal heat-sealing upper dies and longitudinal heat-sealing lower dies which are positioned on two sides of the films and arranged in parallel with the conveying direction of the films, the longitudinal heat-sealing lower dies are fixed on the rack, and the longitudinal heat-sealing upper dies are movably mounted on the rack.

In order to seal a transverse edge of one end of the accordion folding edge, which is connected with the upper film and the lower film, the transverse heat sealing mechanism comprises a group of first transverse heat sealing machines and second transverse heat sealing machines which are alternately arranged on the rack at intervals; the first transverse heat sealing machine comprises a first heat sealing upper die and a first heat sealing lower die, and a heat sealing strip is arranged on the first heat sealing upper die; the second transverse heat sealing machine comprises a second heat sealing upper die and a second heat sealing lower die, and a heat sealing strip is arranged on the second heat sealing lower die.

Furthermore, a material pressing rod for separating the film material from the heat sealing strip on the first heat-sealing upper die is arranged on the first heat-sealing lower die, and a material lifting rod for separating the film material from the heat sealing strip on the second heat-sealing lower die is arranged on the second heat-sealing upper die.

Furthermore, the transverse heat sealing mechanism also comprises a lifting driving device, the lifting driving device comprises a pull rod which moves back and forth, a group of cams are connected to the pull rod, and the cams are rotatably installed on the rack; a group of lifting shafts matched with the cam are arranged above the cam, and the other end of each lifting shaft is fixedly connected with the first heat-sealing upper die and the second heat-sealing upper die respectively.

The utility model has the beneficial effects that: the utility model firstly folds the lower membrane material edge folding mechanism into two organ folded edges, then the upper membrane material is superposed on the organ folded edges on the lower membrane material, and the four-edge-sealed packaging bag is processed by the longitudinal heat sealing mechanism, the longitudinal side edge cutting mechanism, the transverse heat sealing mechanism and the transverse cutting mechanism. The lower film intermittent pulling device and the upper die intermittent pulling device can ensure that the lower film material and the upper film material are conveyed forwards intermittently at a certain tension. The lower film material flanging mechanism adopts a mode that a flanging plate, a forming roller and a supporting plate are matched, the structure is simple, and the rapid and accurate forming of organ flanging can be ensured. A group of adjusting strips is arranged in the circumferential direction of a first material pulling adjusting roller, a second material pulling adjusting roller and an adjusting fixing roller in the folding mechanism, and the problem of folds in the conveying process of organ folds can be solved by adjusting gaps. Horizontal heat-seal machine constructs adopts the horizontal heat-seal machine of first horizontal heat-seal machine and the second that the interval set up in turn, and the upper surface and the lower surface of the all four sides seal wrapping bags in interval heat-seal to when guaranteeing the heat-seal effect, can not be because of upper surface or lower surface high temperature and damage. The material pressing rod and the material lifting rod can ensure that the four-edge-sealed packaging bag is in the conveying process, the heat sealing strip cannot be in contact with the four-edge-sealed packaging bag, and scalding of positions except the heat sealing position of the four-edge-sealed packaging bag is avoided, so that the qualified rate of products is ensured.

The utility model will be described in more detail below with reference to the drawings and examples.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a cross-sectional view of a four-sided package.

Fig. 3 is a schematic structural view of an upper die intermittent material pulling device or a lower die intermittent material pulling device according to the utility model.

FIG. 4 is a schematic view of the lower film creasing mechanism of the present invention.

FIG. 5 is a cross-sectional view of the lower film folding mechanism of the present invention.

Fig. 6 is a schematic view of the material pulling adjusting device of the present invention.

Fig. 7 is a schematic view of the transverse heat-seal mechanism of the present invention.

Detailed Description

An embodiment, as shown in fig. 1 to 7, is a four-edge sealing packaging bag production line for continuously processing four-edge sealing packaging bags 9, the four-edge sealing packaging bags 9 include an upper sheet 91, a lower sheet 92 and organ folds 93 on two sides, the upper sheet 91 and the lower sheet 92 are both planar films, the organ folds 93 are V-shaped films formed by folding, the organ folds 93 are sealed with the upper sheet 91 and the lower sheet 92 through a longitudinal heat sealing mechanism 5, the four-edge sealing packaging bags 9 are sealed at one end through a transverse heat sealing mechanism 7, and then are transversely cut through a transverse cutting mechanism 8 to form the four-edge sealing packaging bags 9 with independent single-side openings.

The four-edge sealing packaging bag production line comprises an upper film conveying mechanism 1, a lower film conveying mechanism 2, a lower film folding mechanism 3, a folding mechanism 4, a longitudinal heat sealing mechanism 5, a longitudinal side edge cutting mechanism 6, a transverse heat sealing mechanism 7 and a transverse cutting mechanism 8 which are arranged on a rack 10.

The upper film material conveying mechanism 1 comprises a group of upper film material guide rollers 13 and an upper film intermittent material pulling device 11 which are arranged on a rack 10, and the upper film material is conveyed forwards in a clearance. Go up membrane intermittent type and draw material device 11 including rotating the swing span 111 of installing on frame 10, swing span 111 goes up parallel arrangement and has first drawing material roller 112 and second drawing material roller 113, still be provided with fixed roll 114 on the frame 10, fixed roll 114 is located between first drawing material roller 112 and the second drawing material roller 113 and is higher than first drawing material roller 112 and second drawing material roller 113, it draws material device 11 still to be provided with the swing span drive arrangement 115 that drives swing span 111 wobbling to go up membrane intermittent type, swing span drive arrangement 115 preferably adopts the hydraulic stem. When the upper film is fed, the pattern surface of the upper film is upwards and forwards conveyed, and when the upper film enters the upper film intermittent drawing device 11, the upper film passes through the lower end surface of the first drawing roller 112, then winds around the upper end surface of the fixed roller 114, and then passes through the lower end surface of the second drawing roller 113. The fixed end of the hydraulic rod is fixed on the frame 10, the telescopic rod of the hydraulic rod is connected with the swing frame 111, and the swing frame 111 is driven to swing back and forth around the swing frame fixing shaft 116 by the back and forth movement of the telescopic rod, so that the upper film is conveyed forwards intermittently.

A film material conveying and positioning device 12 is further arranged behind the upper film intermittent material pulling device 11, and an infrared probe 121 for detecting a positioning point on the film material is arranged on the film material conveying and positioning device 12. A power roller 26 for driving the film to move forward is arranged behind the film conveying and positioning device 12, one end of the power roller 26 is connected with a servo motor 25 for driving the power roller 26 to rotate, the infrared probe 121 automatically recognizes the identification marks on the film and transmits signals to a control system, and the control system judges the conveying speed of the film by calculating the time interval between two adjacent identification marks and controls the operating speed of the servo motor 25 to adjust the conveying speed of the film, thereby ensuring that the film is conveyed forward at a certain speed.

The lower film conveying mechanism 2 comprises a group of lower film guide rollers 22 arranged on the rack 10 and two groups of lower film intermittent drawing devices 21 with the same structure as the upper film intermittent drawing devices 11, a first turning roller 23 used for turning over the lower film is arranged behind the lower film intermittent drawing devices 21, a second turning roller 24 used for returning the lower film is arranged behind the first turning roller 23, and a film conveying and positioning device 12 which is the same as that in the upper film conveying mechanism 1 is arranged between the first turning roller 23 and the second turning roller 24. During feeding, the pattern surface of the lower film material faces downwards and is intermittently conveyed forwards through the lower film intermittent pulling device 21, the lower film material is wound to the first turnover roller 23 through the lower film intermittent pulling device 21, the lower film material is turned over through the lower end surface of the first turnover roller 23, the pattern surface of the lower film material faces upwards and is continuously conveyed towards the conveying direction, the film material conveying and positioning device 12 monitors the identification marks on the pattern surface of the lower film material so as to determine the conveying speed of the lower film material, and then the adjustment is carried out through the power roller 26 so as to ensure that the lower film material is conveyed forwards at a certain speed. The lower film is turned to face the pattern surface downwards by the action of the second turning roller 24, and then conveyed to the lower film folding mechanism 3 by the lower film guide roller 22 to be folded, so that the organ folds 93 are formed on two sides of the lower film.

The lower film material flanging mechanism 3 comprises a supporting plate 31 arranged on the rack 10, flanging plates 33 are symmetrically arranged on two sides of the supporting plate 31, the flanging plates 33 are lower than the supporting plate 31, a flanging forming part 34 extending into the lower portion of the supporting plate 31 is arranged on one side, matched with the supporting plate 31, of the flanging plates 33, a guide bevel edge is arranged at the front end of the flanging forming part 34, a lower film material conveyed horizontally forms a flanging 94 under the action of the flanging forming part 34 and the supporting plate 31, a forming roller 32 is further arranged below the flanging plates 33, and the forming roller 32 is matched with the flanging plates 33 to form a second flanging 95. In order to ensure that the lower film material is conveyed forwards along the supporting plate 31 at the folding position, so as to ensure the folding precision, a material pressing roller 35 is also arranged above the supporting plate 31. A third turnover roller 27 is arranged in front of the lower film material folding mechanism 3, and the pattern surface of the lower film material passes through the upper part of the support plate 31 upwards under the action of the third turnover roller 27 and is folded. A fourth turn-over roller 28 is arranged behind the lower film material flanging mechanism 3, and the pattern surface of the lower film material is conveyed downwards and forwards through the action of the fourth turn-over roller 28.

The lower film passes through the fourth reverse roller 28 and is then laminated together with the upper film by the laminating mechanism 4, so that the upper film is laminated on the accordion folding edges 93. Coincide mechanism 4 includes coincide roller 41 and lower coincide roller 42, be provided with down between membrane material hem mechanism 3 and coincide mechanism 4 and draw material adjusting device 43, draw material adjusting device 43 including rotating the adjustment swinging stand 431 of installing on frame 10, the parallel arrangement has first drawing material adjusting roller 432 and second to draw material adjusting roller 433 on the adjustment swinging stand 431, still be provided with adjustment fixed roll 434 on the frame 10, adjustment fixed roll 434 is located first drawing material adjusting roller 432 and second and draws between the material adjusting roller 433 and be higher than first drawing material adjusting roller 432 and second and draw material adjusting roller 433, still is provided with and drives the wobbling adjustment swinging stand drive arrangement 437 of adjustment swinging stand 431, adjustment swinging stand drive arrangement 437 preferably adopts the hydraulic stem. A group of adjusting strips 435 are arranged on the first pulling material adjusting roller 432, the second pulling material adjusting roller 433 and the adjusting fixing roller 434 along the circumferential direction, the tops of the adjusting strips 435 are arc surfaces, and an adjusting gap 436 is arranged between every two adjacent adjusting strips 435, so that the organ folding edges 93 can be prevented from being pulled and deformed in the conveying process. The lower film material penetrates from the lower end face of the first drawing adjusting roller 432, winds to the upper end face of the adjusting fixing roller 434, winds to the lower end face of the second drawing adjusting roller 433, and finally enters between the upper laminating roller 41 and the lower laminating roller 42; the upper film is conveyed out from the upper film conveying mechanism 1, enters between the upper laminating roller 41 and the lower laminating roller 42 and is positioned above the lower film, and the upper film is attached to the organ folds 93 at two sides of the lower film through the combined action of the upper laminating roller 41 and the lower laminating roller 42.

Upper and lower membrane gets into vertical heat-seal machine structure 5 after 4 coincide of laminating machine, vertical heat-seal machine structure 5 is including the vertical heat-seal that is located the both sides of membrane and parallel and membrane direction of delivery set up and goes up mould 51 and vertical heat-seal lower mould 52, vertical heat-seal lower mould 52 is fixed on frame 10, but mould 51 movable mounting realizes the separation and the laminating with heat-seal lower mould 52 on frame 10 of vertical heat-seal. The longitudinal heat-sealing mechanism 5 seals the upper film and the accordion folds 93 on the two sides of the lower film, and seals the folded corner parts of the lower film connected with the accordion folds 93.

In order to ensure the consistency and stability of the accordion folding edge, the longitudinal heat-sealing upper die 51 and the longitudinal heat-sealing lower die 52 are both provided with longitudinal heat-sealing strips 53, when heat sealing is performed, the longitudinal heat-sealing strips 53 on the longitudinal heat-sealing upper die 51 realize the heat sealing of the accordion folding edge 93 and the upper film to form a first sealing edge 96, and the longitudinal heat-sealing strips 53 on the longitudinal heat-sealing lower die 52 realize the heat sealing of one folding edge 94 to form a second sealing edge 97, so that the stability of the accordion folding edge 93 is ensured.

The longitudinal heat sealing mechanism 5 is used for longitudinally and thermally sealing the upper film and the lower film, then conveying the upper film and the lower film to the longitudinal side edge cutting mechanism 6, cutting the longitudinal heat sealing position, cutting off the waste edges outside the heat sealing position, and ensuring that the two sides of the sealed upper film and the sealed lower film are neat.

And after the upper and lower films are trimmed by the longitudinal side trimming mechanism 6, the upper and lower films are continuously conveyed to the transverse heat sealing mechanism 7 for transverse heat sealing. The transverse heat-seal mechanism 7 includes a set of first and second transverse heat- seals 71 and 72 alternately arranged on the frame 10. The first transverse heat sealing machine 71 comprises a first heat sealing upper die 711 and a first heat sealing lower die 712, wherein the first heat sealing upper die 711 is provided with a heat sealing strip 73; the second transverse heat sealing machine 72 comprises a second heat sealing upper die 721 and a second heat sealing lower die 722, and a heat sealing strip 73 is arranged on the second heat sealing lower die 722. The heat sealing strip 73 of the first transverse heat sealing mechanism 71 acts on the upper film, the heat sealing strip 73 of the second transverse heat sealing mechanism 72 acts on the lower film, and the upper film and the lower film are heated and heat-sealed alternately, so that damage to the films caused by continuous heating of the face films can be avoided on the premise of ensuring the required temperature for heat sealing. And through heating heat-seal many times, can realize better heat-seal shaping.

In order to avoid the burning of the lower film and the upper film due to the contact with the transverse heat-seal strip during the heat-seal conveying process, the first heat-seal lower die 712 is provided with a material pressing rod 713 for separating the film from the transverse heat-seal strip 73 on the first heat-seal upper die 711, and the second heat-seal upper die 721 is provided with a material lifting rod 723 for separating the film from the transverse heat-seal strip 73 on the second heat-seal lower die 722. The transverse heat sealing mechanism 7 further comprises a lifting driving device 74, the lifting driving device 74 comprises a pull rod 741 moving back and forth, the pull rod 741 is connected with a group of cams 742, and the cams 742 are rotatably mounted on the frame 10; a set of lifting shafts 743 matched with the cam 742 is arranged above the cam 742, and the other ends of the lifting shafts 743 are fixedly connected with the first heat-sealing upper die 711 or the second heat-sealing upper die 721 respectively. The pull rod 741 swings back and forth through a power device, the pull rod 741 drives the cam 742 to swing back and forth around the frame 10, and the cam 742 drives the lifting shaft 743 to move up and down, so that the first upper heat-seal die 711 and the second upper heat-seal die 721 are driven to move up and down in an opening and closing manner in the vertical direction.

The film material passes through the space between the first heat-sealing upper die 711 and the first heat-sealing lower die 712 and then passes through the lower end surface of the pressing rod 713, when the first heat-sealing upper die 711 moves upwards and is opened, the film material is conveyed forwards continuously, the pressing rod 713 can press the film material, and the film material is prevented from being scalded due to the fact that the film material is rubbed against the transverse heat-sealing strip 73 on the first heat-sealing upper die 711 in the conveying process; the film material passes through the space between the second upper heat-seal die 721 and the second lower heat-seal die 722 and then passes through the upper end face of the material lifting rod 723, after the second upper heat-seal die 721 moves upwards and is opened, the upper film material and the lower film material are conveyed forwards continuously, the material lifting rod 723 can lift the film material, and the film material is prevented from being scalded due to the fact that the film material touches the transverse heat-seal strip 73 on the second lower heat-seal die 722 in the conveying process.

And a transverse cutting mechanism 8 is further arranged behind the transverse heat sealing mechanism 7, and the transverse cutting mechanism 8 cuts off a four-edge sealing packaging bag 9 with an independent single-side opening at one side of a transverse heat sealing position.

The utility model is described above with reference to the accompanying drawings. It is clear that the specific implementation of the utility model is not restricted in the above manner. Any insubstantial improvements over the methods and technical solutions of the present invention; the above-mentioned conception and technical solutions of the present invention may be directly applied to other fields without any improvement, and all of them are within the scope of the present invention.

Claims (9)

1. The utility model provides a four-edge sealing wrapping bag production line for continuous processing four-edge sealing wrapping bag (9), four-edge sealing wrapping bag (9) include dough sheet (91), following piece (92) and organ hem (93) of both sides, its characterized in that:

comprises a frame (10) for providing fixation and support;

the upper film material conveying mechanism (1) is arranged on the rack (10) and intermittently conveys the upper film material along the length direction of the upper film material;

the lower membrane material conveying mechanism (2) is arranged on the rack (10) and intermittently conveys the lower membrane material along the length direction of the lower membrane material;

the lower film material folding mechanism (3) is arranged on the rack (10) and folds two side edges of the lower film material, so that organ folding edges (93) are formed on two sides of the lower film material;

the folding mechanism (4) is arranged on the rack (10) and is used for folding the upper film material on the folded lower film material so that the side edge of the upper film material is overlapped with the edge of the organ fold (93);

the longitudinal heat-sealing mechanism (5) is arranged on the rack (10) and is used for sealing the upper film and the organ folds (93) on the two sides of the lower film, and simultaneously sealing the folded corner parts of the lower film, which are connected with the organ folds (93);

the longitudinal side trimming mechanism (6) is arranged on the rack (10) and is used for cutting the outer side waste edges at the longitudinal sealing position to ensure that the two sides of the sealed upper film and the sealed lower film are neat;

the transverse heat sealing mechanism (7) is arranged on the rack (10) and is used for transversely heat sealing the upper film and the lower film according to a set position;

and a transverse cutting mechanism (8) which is arranged on the frame (10) and cuts the side of the transverse heat-sealing position to form a four-edge sealing packaging bag (9) with an independent single-side opening.

2. The four-edge-sealed packaging bag production line of claim 1, characterized in that: the upper film material conveying mechanism (1) comprises an upper film intermittent pulling device (11), and the lower film material conveying mechanism (2) comprises a lower film intermittent pulling device (21); the film feeding intermittent drawing device (11) comprises a swing frame (111) rotatably mounted on a rack (10), a first drawing roller (112) and a second drawing roller (113) are arranged on the swing frame (111) in parallel, a fixed roller (114) is further arranged on the rack (10), the fixed roller (114) is positioned between the first drawing roller (112) and the second drawing roller (113) and is higher than the first drawing roller (112) and the second drawing roller (113), and a swing frame driving device (115) for driving the swing frame (111) to swing is further arranged; the structure of the lower film intermittent drawing device (21) is the same as that of the upper film intermittent drawing device (11).

3. The four-edge-sealed packaging bag production line of claim 1, characterized in that: the lower film material flanging mechanism (3) comprises a supporting plate (31) arranged on a rack (10), flanging plates (33) are symmetrically arranged on two sides of the supporting plate (31), the flanging plates (33) are lower than the supporting plate (31), a flanging forming part (34) extending into the lower part of the supporting plate (31) is arranged on one side, matched with the supporting plate (31), of the flanging plates (33), and a forming roller (32) is arranged below the flanging plates (33); a nip roll (35) is also arranged above the support plate (31).

4. The four-edge-sealed packaging bag production line as claimed in claim 1, wherein: the laminating mechanism (4) comprises an upper laminating roller (41) and a lower laminating roller (42), a material pulling adjusting device (43) is arranged between the lower film material folding mechanism (3) and the laminating mechanism (4), the material pulling adjusting device (43) comprises an adjusting swinging frame (431) rotatably mounted on the rack (10), a first material pulling adjusting roller (432) and a second material pulling adjusting roller (433) are arranged on the adjusting swinging frame (431) in parallel, an adjusting fixing roller (434) is also arranged on the rack (10), the adjusting fixing roller (434) is positioned between the first material pulling adjusting roller (432) and the second material pulling adjusting roller (433) and is higher than the first material pulling adjusting roller (432) and the second material pulling adjusting roller (433), and an adjusting swinging frame driving device (115) for driving the adjusting swinging frame (431) to swing is also arranged; a group of adjusting strips (435) are arranged on the first material pulling adjusting roller (432), the second material pulling adjusting roller (433) and the adjusting fixing roller (434) along the circumferential direction, the tops of the adjusting strips (435) are arc surfaces, and an adjusting gap (436) is arranged between every two adjacent adjusting strips (435).

5. The four-edge-sealed packaging bag production line of claim 1, characterized in that: the upper film material conveying mechanism (1) and the lower film material conveying mechanism (2) are both provided with film material conveying and positioning devices (12); the film material conveying and positioning device (12) comprises an infrared probe (121) used for detecting identification marks on the film material, a power roller (26) used for driving the film material to convey forwards is arranged behind the infrared probe (121), the power roller (26) is connected with a servo motor (25), and the film material conveying and positioning device further comprises a control system, and the control system receives signals of the infrared probe (121) and controls the servo motor (25) to rotate.

6. The four-edge-sealed packaging bag production line as claimed in claim 1, wherein: vertical heat-seal mechanism (5) are including being located the both sides of membrane material and being on a parallel with vertical heat-seal mould (51) and vertical heat-seal lower mould (52) that the membrane material direction of delivery set up, vertical heat-seal lower mould (52) are fixed in frame (10), mould (51) movable mounting is gone up in vertical heat-seal on frame (10).

7. The four-edge-sealed packaging bag production line as claimed in claim 1, wherein: the transverse heat-sealing mechanism (7) comprises a group of first transverse heat-sealing machines (71) and second transverse heat-sealing machines (72) which are alternately arranged on the frame (10) at intervals; the first transverse heat sealing machine (71) comprises a first heat sealing upper die (711) and a first heat sealing lower die (712), and a heat sealing strip (73) is arranged on the first heat sealing upper die (711); the second transverse heat sealing machine (72) comprises a second heat sealing upper die (721) and a second heat sealing lower die (722), and a heat sealing strip (73) is arranged on the second heat sealing lower die (722).

8. The four-edge-sealed packaging bag production line of claim 7, wherein: the first heat-seal lower die (712) is provided with a material pressing rod (713) for separating the film material from the heat sealing strip (73) on the first heat-seal upper die (711), and the second heat-seal upper die (721) is provided with a material lifting rod (723) for separating the film material from the heat sealing strip (73) on the second heat-seal lower die (722).

9. The four-edge-sealed packaging bag production line of claim 8, characterized in that: the transverse heat sealing mechanism (7) further comprises a lifting driving device (74), the lifting driving device (74) comprises a pull rod (741) moving back and forth, a group of cams (742) are connected to the pull rod (741), and the cams (742) are rotatably mounted on the rack (10); a group of lifting shafts (743) matched with the cam (742) is arranged above the cam (742), and the other end of each lifting shaft (743) is fixedly connected with the first heat-seal upper die (711) or the second heat-seal upper die (721).

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