CN113910682A - Method for manufacturing four-edge-sealed packaging bag by middle-division bag making machine - Google Patents
Method for manufacturing four-edge-sealed packaging bag by middle-division bag making machine Download PDFInfo
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- CN113910682A CN113910682A CN202111327866.XA CN202111327866A CN113910682A CN 113910682 A CN113910682 A CN 113910682A CN 202111327866 A CN202111327866 A CN 202111327866A CN 113910682 A CN113910682 A CN 113910682A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 116
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 159
- 230000007246 mechanism Effects 0.000 claims description 74
- 239000012528 membrane Substances 0.000 claims description 24
- 210000000056 organ Anatomy 0.000 claims description 20
- 238000010030 laminating Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 8
- 238000009966 trimming Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000009957 hemming Methods 0.000 description 5
- 230000007306 turnover Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/04—Feeding sheets or blanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/20—Cutting sheets or blanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
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Abstract
The invention discloses a method for manufacturing a four-edge sealed packaging bag by a split bag making machine, which comprises an upper film conveying step, a lower film folding step, an overlapping step, a longitudinal heat sealing step, a side edge cutting step, a transverse heat sealing step and a transverse cutting step. Therefore, the production yield 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
Technical Field
The invention relates to the field of packaging bag processing equipment, in particular to a method for manufacturing a four-edge-sealed packaging bag by a middle-split bag making machine.
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 packaging bag is mainly characterized in that two sides of the packaging bag are provided with accordion folds, and the existing four-edge-sealed packaging bag is mostly formed by folding a whole film through folds, for example, the invention with the name of Chinese patent application No. 201811376310.8 is a manufacturing method of a four-edge-sealed self-standing packaging bag and a four-edge-sealed packaging bag, namely, one side of a film material and a position close to the middle position are folded to form two accordion folds, and then the redundant film material part outside the accordion folds at the middle position is folded upwards, so that the side edge of the partial film material covers the accordion folds at 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.
Disclosure of Invention
The invention aims to provide a method for manufacturing four-edge-sealed packaging bags by a split bag making machine, which is used for continuously processing the four-edge-sealed packaging bags and solves the problem of low qualification rate of the conventional method for manufacturing the four-edge-sealed packaging bags.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for manufacturing four-edge sealing packaging bags by a split bag making machine is used for continuously processing the four-edge sealing packaging bags, the four-edge sealing packaging bags comprise an upper sheet, a lower sheet and organ hems on two sides, and the method comprises the following steps:
1) a film feeding step of intermittently feeding the upper film material along the length direction of the upper film material by an upper film material feeding mechanism;
2) a lower film material conveying step of conveying the lower film material intermittently along the length direction of the lower film material by a lower film material conveying mechanism;
3) folding the lower membrane material, namely folding the two side edges of the lower membrane material through a lower membrane material folding mechanism so as to form organ folding edges on the two sides of the lower membrane material;
4) an overlapping step, namely overlapping the upper film on the lower film after the edge folding through an overlapping mechanism to enable the side edge of the upper film to be overlapped with the edge of the edge folding of the organ;
5) a longitudinal heat sealing step, sealing the accordion folded edges at the two sides of the upper membrane and the lower membrane after being overlapped through a longitudinal heat sealing mechanism to form a first sealed edge, and sealing the folded angle part of the lower membrane, which is connected with the accordion folded edges, to form a second sealed edge;
6) a side trimming step, namely cutting off the outer side waste edges at the longitudinal sealing position through a longitudinal side trimming mechanism to ensure that the two sides of the upper film and the lower film after sealing are neat;
7) a transverse heat sealing step, namely transversely heat sealing the upper film and the lower film according to a set position through a transverse heat sealing mechanism;
8) and a transverse cutting step, namely transversely cutting the side of the transverse heat-sealing position by a transverse cutting mechanism to form the four-edge-sealed 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 arranged 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 invention has the beneficial effects that: the invention firstly folds the lower membrane, the two side edges of the lower membrane are firstly folded into two organ folding edges, then the upper membrane is superposed on the organ folding edges on the lower membrane, and then the four-edge-sealed packaging bag is processed by the steps of longitudinal heat sealing, longitudinal side trimming, transverse heat sealing and transverse cutting. 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 of matching a flanging plate, a forming roller and a supporting plate, has a simple structure, and can ensure the quick and accurate forming of organ flanging. A group of adjusting strips is arranged on a first material pulling adjusting roller, a second material pulling adjusting roller and an adjusting fixing roller in the folding mechanism along the circumferential direction, and the problem of folds in the conveying process of organ folding edges 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 invention will be explained in more detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a block diagram of the steps 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 invention.
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 a transverse heat sealing mechanism of the present invention.
FIG. 8 is an assembly diagram of the mechanism corresponding to each step of the present invention.
Detailed Description
In the embodiment, as shown in fig. 1 to 8, a method for manufacturing a four-edge-sealed package bag by a split bag making machine is used for continuously processing the four-edge-sealed package bag 9, the four-edge-sealed package bag 9 comprises 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 step, one end of the four-edge-sealed package bag 9 is sealed through a transverse heat sealing step, and the four-edge-sealed package bag 9 is transversely cut through a transverse cutting step to form the four-edge-sealed package bag 9 with an independent single-side opening. The method specifically comprises the following steps:
1) a film feeding step of intermittently feeding the upper film material in the length direction thereof by an upper film material feeding mechanism 1;
2) a lower film material conveying step of conveying the lower film material intermittently in the length direction of the lower film material by a lower film material conveying mechanism 2;
3) a lower film material folding step of folding the two side edges of the lower film material by a lower film material folding mechanism 3, thereby forming organ folds 93 on the two sides of the lower film material;
4) an overlapping step, namely overlapping the upper film on the folded lower film through an overlapping mechanism 4 to enable the side edge of the upper film to be overlapped with the edge of the organ fold 93;
5) a longitudinal heat sealing step, in which the longitudinal heat sealing mechanism 5 seals the accordion folds 93 at the two sides of the upper film and the lower film after being overlapped to form a first seal edge 96, and seals the folded angle part of the lower film, which is connected with the accordion folds 93, to form a second seal edge 97;
6) a side trimming step, namely cutting off the outside waste edges at the longitudinal sealing position through a longitudinal side trimming mechanism 6 to ensure that the two sides of the sealed upper film and the sealed lower film are neat;
7) a transverse heat sealing step, wherein the transverse heat sealing mechanism 7 is used for carrying out transverse heat sealing on the upper film and the lower film according to a set position;
8) and a transverse cutting step of transversely cutting the four-edge-sealed packaging bag 9 with an independent single-side opening at one side of the transverse heat-sealing position by a transverse cutting mechanism 8.
The following describes in detail the mechanisms and methods to which the present invention relates:
as shown in fig. 3 and 8, the upper film conveying mechanism 1 in step 1) includes a set of upper film guide rollers 13 and an upper film intermittent drawing device 11, which are arranged on the frame 10, and conveys the upper film forward at a gap. 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 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.
As shown in fig. 3 and 8, the lower film conveying mechanism 2 in the step 2) includes a set of lower film guiding rollers 22 arranged on the frame 10 and two sets of lower film intermittent pulling devices 21 having the same structure as the upper film intermittent pulling device 11, a first turning roller 23 for turning over the lower film is arranged behind the lower film intermittent pulling devices 21, a second turning roller 24 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.
As shown in fig. 4 and 5, in the lower film material folding mechanism 3 in step 3), the lower film material folding mechanism 3 includes a support plate 31 disposed on the frame 10, folding plates 33 are symmetrically disposed on two sides of the support plate 31, the folding plates 33 are disposed lower than the support plate 31, a folding forming portion 34 extending into the lower portion of the support plate 31 is disposed on one side of the folding plate 33, which is matched with the support plate 31, the front end of the folding forming portion 34 is provided with a guiding bevel edge, the lower film material horizontally conveyed forms a folding edge 94 under the action of the folding forming portion 34 and the support plate 31, a forming roller 32 is further disposed below the folding plate 33, and the forming roller 32 and the folding plate 33 are matched to form two folding edges 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. The lower film material flanging mechanism 3 is also provided with a third turnover roller 27 in front, and the pattern surface of the lower film material passes through the upper part of the supporting plate 31 upwards under the action of the third turnover roller 27 to complete flanging. A fourth reversing roller 28 is arranged behind the lower film folding mechanism 3, and the lower film is conveyed to the folding mechanism 4 by the action of the fourth reversing roller 28, with the pattern surface of the lower film facing downwards.
The folding mechanism 4 in the step 4), as shown in fig. 6 and 8, the folding mechanism 4 includes an upper folding roller 41 and a lower folding roller 42, a material pulling adjusting device 43 is disposed between the lower film material folding mechanism 3 and the folding mechanism 4, the material pulling adjusting device 43 includes an adjusting swing frame 431 rotatably mounted on the frame 10, a first material pulling adjusting roller 432 and a second material pulling adjusting roller 433 are disposed on the adjusting swing frame 431 in parallel, an adjusting fixing roller 434 is further disposed on the frame 10, the adjusting fixing roller 434 is located 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, an adjusting swing frame driving device 437 for driving the adjusting swing frame 431 to swing is further disposed, and the adjusting swing frame driving device 437 preferably employs a hydraulic rod. 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 pulling adjusting roller 432, winds to the upper end face of the adjusting fixing roller 434, winds to the lower end face of the second pulling 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.
The longitudinal heat sealing mechanism 5 in the step 5) includes, as shown in fig. 8, a longitudinal heat sealing upper die 51 and a longitudinal heat sealing lower die 52 which are located on two sides of the film and are arranged in parallel with the film conveying direction, the longitudinal heat sealing lower die 52 is fixed on the frame 10, and the longitudinal heat sealing upper die 51 is movably mounted on the frame 10 and can move up and down to separate and attach to the heat sealing lower die 52. 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.
The transverse heat-sealing mechanism 7 in the step 7), as shown in fig. 7, the transverse heat-sealing mechanism 7 includes a set of first transverse heat-sealing machines 71 and second transverse heat-sealing machines 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 includes a second heat-sealing upper die 721 and a second heat-sealing lower die 722, and the heat-sealing strip 73 is disposed 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.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (9)
1. A method of manufacturing four-edge-sealed packaging bags by a split bag making machine, for continuously processing the four-edge-sealed packaging bags, wherein the four-edge-sealed packaging bag (9) comprises an upper sheet (91), a lower sheet (92) and organ folds (93) at two sides, and is characterized by comprising the following steps:
1) a film feeding step of intermittently feeding the upper film material along the length direction of the upper film material by an upper film material feeding mechanism (1);
2) a lower film material conveying step of conveying the lower film material intermittently in the length direction of the lower film material by a lower film material conveying mechanism (2);
3) a lower membrane material folding step, wherein two side edges of the lower membrane material are folded through a lower membrane material folding mechanism (3), so that organ folding edges (93) are formed on two sides of the lower membrane material;
4) an overlapping step, wherein an upper film is overlapped on the lower film after the edge folding through an overlapping mechanism (4) so that the side edge of the upper film is overlapped with the edge of the organ edge folding (93);
5) a longitudinal heat sealing step, wherein the longitudinal heat sealing mechanism (5) is used for sealing the accordion folds (93) at the two sides of the upper film and the lower film after being overlapped to form a first sealed edge (96), and simultaneously sealing the folded angle part of the lower film, which is connected with the accordion folds (93), to form a second sealed edge (97);
6) a side trimming step, namely cutting off the outside waste edges at the longitudinal sealing position through a longitudinal side trimming mechanism (6) to ensure that the two sides of the sealed upper film and the sealed lower film are neat;
7) a transverse heat sealing step, wherein the upper film and the lower film are transversely heat sealed according to a set position through a transverse heat sealing mechanism (7);
8) and a transverse cutting step, wherein a transverse cutting mechanism (8) is used for transversely cutting one side of the transverse heat sealing position to form a four-edge sealing packaging bag (9) with an independent single-side opening.
2. The method of making a four-edge-sealed package using a separate bag machine of claim 1, wherein: 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 intermittent film feeding pulling device (11) comprises a swinging frame (111) rotatably mounted on a rack (10), a first pulling roller (112) and a second pulling roller (113) are arranged on the swinging frame (111) in parallel, a fixed roller (114) is further arranged on the rack (10), the fixed roller (114) is positioned between the first pulling roller (112) and the second pulling roller (113) and is higher than the first pulling roller (112) and the second pulling roller (113), and a swinging frame driving device (115) for driving the swinging 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 method of making a four-edge-sealed package using a separate bag machine of claim 1, wherein: 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 method of making a four-edge-sealed package using a separate bag machine of 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 flanging mechanism (3) and the laminating mechanism (4), the material pulling adjusting device (43) comprises an adjusting swing frame (431) rotatably installed on the rack (10), a first material pulling adjusting roller (432) and a second material pulling adjusting roller (433) are arranged on the adjusting swing frame (431) in parallel, an adjusting fixed roller (434) is further arranged on the rack (10), the adjusting fixed 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 swing frame driving device (115) for driving the adjusting swing frame (431) to swing is further 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 method of making a four-edge-sealed package using a separate bag machine of claim 1, wherein: 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 method of making a four-edge-sealed package using a separate bag machine of 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 on frame (10), mould (51) movable mounting is gone up in vertical heat-seal on frame (10).
7. The method of making a four-edge-sealed package using a separate bag machine of 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 method of making a four-edge-sealed package using a separate bag machine 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 method of making a four-edge-sealed package using a separate bag machine of claim 8, wherein: 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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| CN202111327866.XA CN113910682B (en) | 2021-11-10 | 2021-11-10 | Method for manufacturing four-side sealed bags by middle-split bag making machine |
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Cited By (1)
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|---|---|---|---|---|
| CN114670497A (en) * | 2022-04-06 | 2022-06-28 | 浙江名立机械科技有限公司 | Multi-seal fork edge bag making machine and bag making process |
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| CN113910682B (en) | 2024-04-12 |
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