CN113910682B - Method for manufacturing four-side sealed bags by middle-split bag making machine - Google Patents
Method for manufacturing four-side sealed bags by middle-split bag making machine Download PDFInfo
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- CN113910682B CN113910682B CN202111327866.XA CN202111327866A CN113910682B CN 113910682 B CN113910682 B CN 113910682B CN 202111327866 A CN202111327866 A CN 202111327866A CN 113910682 B CN113910682 B CN 113910682B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 113
- 238000004806 packaging method and process Methods 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000009966 trimming Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 189
- 230000007246 mechanism Effects 0.000 claims description 89
- 239000012528 membrane Substances 0.000 claims description 42
- 210000000056 organ Anatomy 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 6
- 238000012797 qualification Methods 0.000 abstract description 4
- 230000007306 turnover Effects 0.000 description 10
- 238000010030 laminating Methods 0.000 description 7
- 238000009957 hemming Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
-
- 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
-
- 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 four-edge sealed packaging bags by a middle-split bag making machine, which comprises an upper film conveying step, a lower film flanging step, a superposition step, a longitudinal heat sealing step, a side trimming step, a transverse heat sealing step and a transverse cutting step. Thereby greatly improving the production qualification rate of the four-side packaging bag, improving the processing efficiency and reducing the production cost, and can be widely applied to the technical field of production and processing of the four-side packaging bag.
Description
Technical Field
The invention relates to the field of packaging bag processing equipment, in particular to a method for manufacturing four-side sealed bags by a middle-split bag making machine.
Background
The four-side sealed packaging bag is used as a common structural form of the packaging bag, is convenient to erect due to good structural strength, and is widely used by various industries.
The four-edge sealed packaging bag is mainly characterized in that organ folds are formed on two side edges of the packaging bag, an existing four-edge sealed packaging bag is mainly formed by folding a whole film in half through the folds, such as a manufacturing method of a four-edge sealed self-supporting packaging bag and a four-edge sealed packaging bag disclosed by the invention of Chinese patent application number 201811376310.8, wherein the manufacturing method is adopted, namely, one side of a film material and a position close to the middle position are folded to form two organ folds, and then redundant film material parts outside the organ folds at the middle position are folded upwards, so that the side edges of the film material are covered on the organ folds at the other side. The conventional method is convenient and trouble-saving, the positive film material is directly guided into a machine to produce four-edge packaging bags, however, when the film material is folded upwards, the organ folded edges connected with the film material can not be well fixed, the film material is very easy to pull and deform during folding, particularly the four-edge packaging bags with large size, the probability of deformation is larger due to large required pulling force, the rejection rate of products is increased, and the rejection rate of the method is counted to be up to 30%. In addition, there is another method that the upper sheet, the lower sheet and the organ folded edges of the four-edge sealed packaging bag are manufactured independently, and then the four-edge sealed packaging bag is heat-sealed by equipment, so that the problem that the organ folded edges are not easy to position is also solved, the rejection rate is high, and therefore, a production line is required to be designed to improve the qualification rate of the four-edge sealed packaging bag.
Disclosure of Invention
The invention aims to provide a method for manufacturing four-side sealed bags by a middle-split bag making machine, which is used for continuously processing four-side sealed bags and solves the problem of low qualification rate of the traditional four-side sealed bag manufacturing method.
The technical scheme adopted for solving the technical problems is as follows: a method for manufacturing four-side sealed packaging bags by a middle-split bag making machine, which is used for continuously processing the four-side sealed packaging bags, wherein the four-side sealed packaging bags comprise an upper sheet, a lower sheet and organ folds at two sides, and comprises the following steps:
1) An upper film conveying step of intermittently conveying the upper film along the length direction of the upper film by an upper film conveying mechanism;
2) A lower film conveying step of intermittently conveying the lower film along the length direction of the lower film by a lower film conveying mechanism;
3) A lower membrane material flanging step, namely folding two side edges of the lower membrane material through a lower membrane material flanging mechanism, so as to form organ flanging at two sides of the lower membrane material;
4) A folding step, namely, folding the upper membrane material on the folded lower membrane material through a folding mechanism to enable the side edge of the upper membrane material to be overlapped with the edge of the organ folded edge;
5) A longitudinal heat sealing step, namely sealing the folded organ folds at two sides of the upper membrane material and the lower membrane material through a longitudinal heat sealing mechanism to form a first sealed edge, and sealing the folded corner part where the lower membrane material and the organ folds are connected to form a second sealed edge;
6) A side trimming step, namely cutting off the outer side slitter edges at the longitudinal sealing position through a longitudinal side trimming mechanism, so as to ensure that the two sides of the sealed upper membrane material and lower membrane material are neat;
7) A transverse heat sealing step, namely transversely heat-sealing the upper membrane material and the lower membrane material according to a set position through a transverse heat sealing mechanism;
8) And a transverse cutting step, namely transversely cutting one side of the transverse heat sealing position through a transverse cutting mechanism to form a four-side sealed packaging bag with an independent single-side opening.
In order to facilitate the transfer of the film, the upper film conveying mechanism comprises an upper film intermittent material pulling device, and the lower film conveying mechanism comprises a lower film intermittent material pulling device; the upper film intermittent material pulling device comprises a swing frame rotatably installed on a frame, a first material pulling roller and a second material pulling roller are arranged on the swing frame in parallel, a fixed roller is also arranged on the frame, the fixed roller is positioned between the first material pulling roller and the second material pulling roller and higher than the first material pulling roller and the second material pulling 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.
For folding to form an organ flanging, the lower membrane flanging mechanism comprises a supporting plate arranged on a frame, flanging plates are symmetrically arranged on two sides of the supporting plate and lower than the supporting plate, a flanging forming part extending into the lower part of the supporting plate is arranged on one side of the flanging plate matched with the supporting plate, and a forming roller is arranged below the flanging plate; and a material pressing roller is further arranged above the supporting plate.
In order to fold the side edge of the upper film material on the organ folded edge of the lower film material, the folding mechanism comprises an upper folding roller and a lower folding roller, a material pulling adjusting device is arranged between the lower film material folding mechanism and the folding mechanism, the material pulling adjusting device comprises an adjusting swing frame rotatably arranged on a frame, 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 frame, and 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 group of adjusting strips are arranged on the first material pulling adjusting roller, the second material pulling adjusting roller and the adjusting fixing roller along the circumferential direction, the tops of the adjusting strips are arc surfaces, and adjusting gaps are formed between two adjacent adjusting strips.
In order to prevent dislocation when the upper and lower films are overlapped, the upper film conveying mechanism and the lower film conveying mechanism are respectively provided with a film conveying and positioning device; the film conveying and positioning device is provided with an infrared probe for detecting positioning points on the film.
In order to be convenient for seal four contact edges of upper and lower membrane material and organ hem, vertical heat seal mechanism is including being located the both sides of membrane material and the vertical heat seal upper die and the vertical heat seal lower die that parallel and membrane material direction of delivery set up, vertical heat seal lower die is fixed in the frame, vertical heat seal upper die movable mounting is in the frame.
In order to facilitate the sealing of one transverse edge of one end of the organ folded edge connected with the upper and lower films, the transverse heat sealing mechanism comprises a group of first transverse heat sealing mechanisms and second transverse heat sealing mechanisms which are alternately arranged on the frame at intervals; the first transverse heat sealing mechanism comprises a first heat sealing upper die and a first heat sealing lower die, and a heat seal is arranged on the first heat sealing upper die; the second transverse heat sealing mechanism comprises a second heat sealing upper die and a second heat sealing lower die, and a heat seal is arranged on the second heat sealing lower die.
Further, a pressing rod for separating the film material from the heat sealing strip on the first heat sealing lower die is arranged on the first heat sealing lower die, and a 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.
Further, the transverse heat sealing mechanism further comprises a material lifting driving device, the material 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 arranged on the rack; the upper part of the cam is provided with a group of lifting shafts matched with the cam, and the other ends of the lifting shafts are fixedly connected with the first heat seal upper die and the second heat seal upper die respectively.
The invention has the beneficial effects that: according to the invention, the lower film material is folded, two side edges of the lower film material are folded into two organ folds, then the upper film material is overlapped on the organ folds on the lower film material, and the four-side packaging bag is processed through the steps of longitudinal heat sealing, longitudinal side trimming, transverse heat sealing and transverse cutting. The lower film intermittent material pulling device and the upper die intermittent material pulling device can ensure that the lower film material and the upper film material are intermittently and forwards conveyed under a certain tension. The lower membrane material flanging mechanism adopts a flanging plate, a forming roller and a supporting plate to be matched, has a simple structure, and can ensure rapid and accurate forming of the organ flanging. A group of adjusting bars are arranged on the first pulling adjusting roller, the second pulling adjusting roller and the adjusting fixing roller in the superposition mechanism along the circumferential direction, and the problem that folds occur in the conveying process of the organ flanging can be solved through adjusting gaps. The transverse heat sealing mechanism adopts a first transverse heat sealing mechanism and a second transverse heat sealing mechanism which are alternately arranged at intervals, and the upper surface and the lower surface of each of the four sides of the interval are sealed and packaged for heat sealing, so that the heat sealing effect is ensured, and meanwhile, the upper surface or the lower surface cannot be damaged due to overhigh temperature. The pressing rod and the lifting rod can ensure that the four-side sealing packaging bags are not contacted with the four-side sealing packaging bags in the conveying process, so that scalding at positions beyond the heat sealing positions of the four-side sealing packaging bags is avoided, and the qualification rate of products is ensured.
The invention will be described 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 bag.
Fig. 3 is a schematic structural view of an upper die intermittent drawing device or a lower die intermittent drawing device according to the present invention.
FIG. 4 is a schematic view of the lower film hemming mechanism of the present invention.
FIG. 5 is a cross-sectional view of the lower film hemming mechanism of the present invention.
Fig. 6 is a schematic diagram of a pulling adjustment device according to the present invention.
Fig. 7 is a schematic view of a transverse heat seal mechanism of the present invention.
FIG. 8 is an assembly schematic diagram of the mechanism corresponding to each step of the present invention.
Detailed Description
In an embodiment, as shown in fig. 1 to 8, a method for manufacturing a four-side packaging bag by a middle bag-making machine is used for continuously processing the four-side packaging bag 9, wherein the four-side packaging 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 film materials, the organ folds 93 are folded and formed V-shaped film materials, 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-side packaging bag 9 is sealed through a transverse heat sealing step, and then the four-side packaging bag 9 with an independent single-side opening is formed through transverse cutting through a transverse cutting step. The method specifically comprises the following steps:
1) An upper film conveying step of intermittently conveying the upper film along the length direction of the upper film by an upper film conveying mechanism 1;
2) A lower film conveying step of intermittently conveying the lower film along the length direction of the lower film by a lower film conveying mechanism 2;
3) A lower film material flanging step, namely folding two side edges of the lower film material through a lower film material flanging mechanism 3, so as to form organ flanging 93 on two sides of the lower film material;
4) A folding step, namely, the upper membrane material is folded on the folded lower membrane material through a folding mechanism 4, so that the side edge of the upper membrane material is overlapped with the edge of the organ folded edge 93;
5) A longitudinal heat sealing step, namely sealing the organ folded edges 93 on two sides of the upper membrane material and the lower membrane material which are overlapped through a longitudinal heat sealing mechanism 5 to form a first sealed edge 96, and sealing the folded corner parts of the lower membrane material, which are connected with the organ folded edges 93, to form a second sealed edge 97;
6) A side trimming step, namely cutting off the outer side slitter edges at the longitudinal sealing position through a longitudinal side trimming mechanism 6, so as to ensure that the two sides of the sealed upper membrane material and lower membrane material are neat;
7) A transverse heat sealing step, namely transversely heat-sealing the upper film material and the lower film material according to a set position through a transverse heat sealing mechanism 7;
8) And a transverse cutting step, namely transversely cutting one side of the transverse heat sealing position by a transverse cutting mechanism 8 to form a four-side sealed packaging bag 9 with an independent single-side opening.
The mechanisms and methods to which the present invention relates are described in detail below:
as shown in fig. 3 and 8, the upper film conveying mechanism 1 in the step 1) includes a set of upper film guiding rollers 13 and an upper film intermittent pulling device 11 disposed on a frame 10, and the upper film conveying mechanism 1 conveys the upper film forward in a gap. The intermittent film feeding and pulling device 11 comprises a swing frame 111 rotatably installed on the frame 10, a first pulling roller 112 and a second pulling roller 113 are arranged on the swing frame 111 in parallel, a fixed roller 114 is further arranged on the frame 10, the fixed roller 114 is located between the first pulling roller 112 and the second pulling roller 113 and higher than the first pulling roller 112 and the second pulling roller 113, the intermittent film feeding and pulling device 11 is further provided with a swing frame driving device 115 for driving the swing frame 111 to swing, and the swing frame driving device 115 preferably adopts a hydraulic rod. During feeding, the pattern surface of the upper film material is conveyed upwards and forwards, and when entering the upper film intermittent material pulling device 11, the pattern surface passes through the lower end surface of the first material pulling roller 112, then winds the upper end surface of the fixed roller 114, and passes out of the lower end surface of the second material pulling 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 fixed shaft 116 through the back and forth movement of the telescopic rod, so that the upper film material is intermittently conveyed forwards.
The back of the upper film intermittent pulling device 11 is also provided with a film material conveying and positioning device 12, and the film material conveying and positioning device 12 is provided with an infrared probe 121 for detecting positioning points on the film material. The film material conveying and positioning device 12 is provided with a power roller 26 for driving the film material to move forwards, 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 identification marks on the film material and transmits signals to a control system, the control system judges the conveying speed of the film material by calculating the time interval between two adjacent identification marks, and controls the running speed of the servo motor 25 to adjust the conveying speed of the film material, so that the film material is conveyed forwards 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 and two sets of lower film intermittent pulling devices 21 with the same structure as the upper film intermittent pulling device 11, which are disposed on the frame 10, a first turn-over roller 23 for turning over the lower film is disposed behind the lower film intermittent pulling device 21, a second turn-over roller 24 for turning back the lower film is disposed behind the first turn-over roller 23, and the same film conveying positioning device 12 as the upper film conveying mechanism 1 is disposed between the first turn-over roller 23 and the second turn-over roller 24. During feeding, the pattern surface of the lower film material is downward and intermittently and forwards conveyed through the lower film intermittent material pulling device 21, the lower film material is wound to the first turning roller 23 through the lower film intermittent material pulling device 21, the lower film material is turned over through the lower end surface of the first turning roller 23, the pattern surface of the lower film material is continuously conveyed in the conveying direction, the film material conveying positioning device 12 monitors the identification mark on the pattern surface of the lower film material to determine the conveying speed of the lower film material, and the lower film material is regulated through the power roller 26 to ensure that the lower film material is conveyed forwards at a certain speed. The lower film is turned over by the second turn-over roller 24 to make the pattern face downward, and then is conveyed to the lower film hemming mechanism 3 by the lower film guide roller 22 to be folded, so that organ hemming 93 is formed at both sides of the lower film.
The lower film material flanging mechanism 3 in the step 3), as shown in fig. 4 and 5, the lower film material flanging mechanism 3 includes a support plate 31 disposed on the frame 10, two sides of the support plate 31 are symmetrically provided with flanging plates 33, the flanging plates 33 are lower than the support plate 31, one side of the flanging plates 33 matched with the support plate 31 is provided with a flanging forming portion 34 extending into the lower portion of the support plate 31, a guiding bevel edge is disposed at the front end of the flanging forming portion 34, a lower film material conveyed horizontally forms a flanging 94 under the action of the flanging forming portion 34 and the support plate 31, a forming roller 32 is disposed below the flanging plates 33, and the forming roller 32 cooperates with the flanging plates 33 to form a two-way flanging 95. In order to ensure that the lower film material is conveyed forward against the support plate 31 at the edge folding position, thereby ensuring the edge folding precision, a material pressing roller 35 is also arranged above the support plate 31. The lower film hemming mechanism 3 is further provided with a third turn-over roller 27, and the pattern surface of the lower film passes through the upper side of the supporting plate 31 and hemms under the action of the third turn-over roller 27. A fourth turn-over roller 28 is arranged behind the lower film material hemming mechanism 3, and the pattern surface of the lower film material is conveyed downwards and forwards by the action of the fourth turn-over roller 28 to the laminating mechanism 4.
As shown in fig. 6 and 8, the stacking mechanism 4 in the step 4) includes an upper stacking roller 41 and a lower stacking roller 42, a material pulling adjusting device 43 is disposed between the lower film material folding mechanism 3 and the stacking 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 fixed roller 434 is further disposed on the frame 10, the adjusting fixed roller 434 is disposed between the first material pulling adjusting roller 432 and the second material pulling adjusting roller 433 and higher than the first material pulling adjusting roller 432 and the second material pulling adjusting roller 433, and 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 adopts a hydraulic rod. A group of adjusting bars 435 are installed on the first pulling adjusting roller 432, the second pulling adjusting roller 433 and the adjusting fixing roller 434 along the circumferential direction, the top of each adjusting bar 435 is an arc surface, and an adjusting gap 436 is provided between two adjacent adjusting bars 435, so that the organ folded edges 93 can be prevented from being pulled and deformed in the conveying process. The lower film material penetrates from the lower end surface of the first material pulling adjusting roller 432, winds to the upper end surface of the adjusting fixed roller 434, winds to the lower end surface of the second material pulling adjusting roller 433, and finally enters between the upper laminating roller 41 and the lower laminating roller 42; the upper film material is conveyed out from the upper film material conveying mechanism 1, enters between the upper laminating roller 41 and the lower laminating roller 42 and is positioned above the lower film material, and the upper film material is attached to the organ folds 93 on two sides of the lower film material 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) is shown in fig. 8, where the longitudinal heat sealing mechanism 5 includes a longitudinal heat sealing upper die 51 and a longitudinal heat sealing lower die 52 that are located at two sides of the film and parallel to the conveying direction of the film, 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 from and attach to the longitudinal heat sealing lower die 52. The longitudinal heat sealing mechanism 5 seals the organ folds 93 on two sides of the upper membrane material and the lower membrane material, and seals the folded corner parts where the lower membrane material and the organ folds 93 are connected.
The transverse heat-seal mechanism 7 in the step 7) includes, as shown in fig. 7, a set of first transverse heat-seal mechanisms 71 and second transverse heat-seal mechanisms 72 alternately arranged at intervals on the frame 10. The first transverse heat-sealing mechanism 71 comprises a first heat-sealing upper die 711 and a first heat-sealing lower die 712, and a heat seal 73 is arranged on the first heat-sealing upper die 711; the second transverse heat-sealing mechanism 72 includes a second upper heat-sealing die 721 and a second lower heat-sealing die 722, and the heat-sealing tape 73 is provided on the second lower heat-sealing die 722. The heat seal 73 of the first transverse heat seal mechanism 71 acts on the upper film material, the heat seal 73 of the second transverse heat seal mechanism 72 acts on the lower film material, and the film materials are heated and heat-sealed alternately, so that the film materials are prevented from being damaged when the film materials are continuously heated on the premise that the temperature required for heat sealing can be ensured. And by heating and heat-sealing for a plurality of times, better heat-sealing molding can be realized.
In order to avoid scalding the lower film material and the upper film material in contact with the transverse heat seal strips in the heat seal conveying process, the first heat seal lower die 712 is provided with a material pressing rod 713 for separating the film material from the transverse heat seal 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 transverse heat seal 73 on the second heat seal lower die 722. The transverse heat sealing mechanism 7 further comprises a material lifting driving device 74, the material lifting driving device 74 comprises a pull rod 741 which moves back and forth, a group of cams 742 are connected to the pull rod 741, and the cams 742 are rotatably arranged on the frame 10; a set of lifting shafts 743 matched with the cams 742 are arranged above the cams 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 as to drive the first heat sealing upper die 711 and the second heat sealing upper die 721 to move up and down along the vertical direction.
The film passes through the space between the first heat seal upper die 711 and the first heat seal lower die 712 and then passes through the lower end surface of the pressing rod 713, when the first heat seal upper die 711 moves upwards and is opened, the film continues to be conveyed forwards, the pressing rod 713 can press the film, and the film is prevented from being scalded due to the fact that the film is rubbed against the transverse heat seal 73 on the first heat seal upper die 711 in the conveying process; the film passes through the space between the second heat seal upper die 721 and the second heat seal lower die 722, and then passes through the upper end surface of the material lifting rod 723, when the second heat seal upper die 721 moves upwards and is opened, the upper and lower films continue to be conveyed forwards, and the material lifting rod 723 can lift the film to prevent the film from being scalded due to rubbing against the transverse heat seal 73 on the second heat seal lower die 722 in the conveying process.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (6)
1. A method for manufacturing four-side sealed bags by a middle-split bag making machine, which is used for continuously processing four-side sealed bags, wherein the four-side sealed bags (9) comprise an upper sheet (91), a lower sheet (92) and organ folds (93) on two sides, and the method is characterized by comprising the following steps:
1) An upper film conveying step, namely intermittently conveying the upper film along the length direction of the upper film through an upper film conveying mechanism (1);
2) A lower film conveying step of intermittently conveying the lower film along the length direction of the lower film by a lower film conveying mechanism (2);
3) A lower membrane material flanging step, namely folding two side edges of the lower membrane material through a lower membrane material flanging mechanism (3), so as to form organ flanging (93) on two sides of the lower membrane material;
4) A superposition step, namely superposing an upper film material on the folded lower film material through a superposition mechanism (4) to ensure that the side edge of the upper film material is superposed with the edge of the organ folded edge (93);
5) A longitudinal heat sealing step, namely sealing the folded upper membrane material and organ folded edges (93) on two sides of the lower membrane material through a longitudinal heat sealing mechanism (5) to form a first sealed edge (96), and simultaneously sealing the folded corner parts of the lower membrane material and the organ folded edges (93) to form a second sealed edge (97);
6) A side trimming step, namely cutting off the outer side slitter edges at the longitudinal sealing position through a longitudinal side trimming mechanism (6), so as to ensure that the two sides of the sealed upper membrane material and lower membrane material are neat;
7) A transverse heat sealing step, namely transversely heat sealing the upper film material and the lower film material according to a set position through a transverse heat sealing mechanism (7);
8) A transverse cutting step, namely transversely cutting one side of a transverse heat sealing position through a transverse cutting mechanism (8) to form a four-side sealed packaging bag (9) with an independent single-side opening;
the upper film conveying mechanism (1) comprises an upper film intermittent material pulling device (11), and the lower film conveying mechanism (2) comprises a lower film intermittent material pulling device (21); the upper film intermittent material pulling device (11) comprises a swing frame (111) rotatably installed on a frame (10), a first material pulling roller (112) and a second material pulling roller (113) are arranged on the swing frame (111) in parallel, a fixed roller (114) is also arranged on the frame (10), and the fixed roller (114) is positioned between the first material pulling roller (112) and the second material pulling roller (113) and higher than the first material pulling roller (112) and the second material pulling roller (113), and a swing frame driving device (115) for driving the swing frame (111) to swing is also arranged; the structure of the lower film intermittent material pulling device (21) is the same as that of the upper film intermittent material pulling device (11);
the lower film flanging mechanism (3) comprises a supporting plate (31) arranged on a frame (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), flanging forming parts (34) extending into the lower part of the supporting plate (31) are arranged on one side of the flanging plates (33) matched with the supporting plate (31), and forming rollers (32) are arranged below the flanging plates (33); a material pressing roller (35) is arranged above the supporting plate (31);
the folding mechanism (4) comprises an upper folding roller (41) and a lower folding roller (42), a material pulling adjusting device (43) is arranged between the lower film material folding mechanism (3) and the folding mechanism (4), the material pulling adjusting device (43) comprises an adjusting swing frame (431) rotatably arranged on a frame (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 frame (10), and 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 pulling adjusting roller (432), the second 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).
2. The method for manufacturing the four-side sealed packaging bag by the medium-split bag making machine according to claim 1, wherein the method comprises the following steps of: the upper membrane material conveying mechanism (1) and the lower membrane material conveying mechanism (2) are respectively provided with a membrane material conveying and positioning device (12); the film conveying and positioning device (12) comprises an infrared probe (121) for detecting identification marks on the film, a power roller (26) for driving the film to be conveyed forwards is arranged behind the infrared probe (121), the power roller (26) is connected with a servo motor (25), and the film conveying and positioning device further comprises a control system, wherein the control system receives signals of the infrared probe (121) and controls the servo motor (25) to rotate.
3. The method for manufacturing the four-side sealed packaging bag by the medium-split bag making machine according to claim 1, wherein the method comprises the following steps of: the longitudinal heat sealing mechanism (5) comprises a longitudinal heat sealing upper die (51) and a longitudinal heat sealing lower die (52), wherein the longitudinal heat sealing upper die (51) and the longitudinal heat sealing lower die (52) are arranged on two sides of a film material and parallel to the conveying direction of the film material, the longitudinal heat sealing lower die (52) is fixed on the frame (10), and the longitudinal heat sealing upper die (51) is movably arranged on the frame (10).
4. The method for manufacturing the four-side sealed packaging bag by the medium-split bag making machine according to claim 1, wherein the method comprises the following steps of: the transverse heat-sealing mechanism (7) comprises a group of first transverse heat-sealing mechanisms (71) and second transverse heat-sealing mechanisms (72) which are alternately arranged on the frame (10) at intervals; the first transverse heat sealing mechanism (71) comprises a first heat sealing upper die (711) and a first heat sealing lower die (712), and a heat seal (73) is arranged on the first heat sealing upper die (711); the second transverse heat sealing mechanism (72) comprises a second heat sealing upper die (721) and a second heat sealing lower die (722), and a heat seal (73) is arranged on the second heat sealing lower die (722).
5. The method for manufacturing the four-side sealed packaging bag by the medium-split bag making machine according to claim 4, wherein the method comprises the following steps of: the first heat-sealing 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-sealing upper die (711), and the second heat-sealing 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-sealing lower die (722).
6. The method for manufacturing the four-side sealed packaging bag by the medium-split bag making machine according to claim 5, wherein the method comprises the following steps of: the transverse heat sealing mechanism (7) further comprises a lifting driving device (74), the lifting driving device (74) comprises a pull rod (741) which moves back and forth, a group of cams (742) are connected to the pull rod (741), and the cams (742) are rotatably arranged on the frame (10); a group of lifting shafts (743) matched with the cams (742) are arranged above the cams (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.
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| CN118306061B (en) * | 2024-06-11 | 2024-08-02 | 湖南大道新材料有限公司 | Production equipment of self-heating packaging bag |
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