Back sealing bag production adjusting device

Abstract

The utility model relates to a back sealing bag production adjusting device which comprises a horizontally-arranged workbench, the workbench is provided with a folding mechanism, the folding mechanism comprises a pre-pressing device, a folding and pressing device and an edge pressing device which are sequentially installed in the length direction of the workbench, the folding mechanism folds and shapes the two side edges of a composite film, and the edge pressing device is used for pressing the two side edges of the composite film. A portal frame is arranged at the end, close to the length direction, of the workbench, a connecting rod is arranged on the side, facing the workbench, of the portal frame, a lower pressing plate is connected to the end, away from the portal frame, of the connecting rod, and the lower pressing plate is arranged between the workbench and the folding mechanism and is arranged in the length direction of the workbench. A guide part is arranged between the connecting rod and the lower pressing plate, and an abutting block is arranged on one side of the guide part in the width direction. The heat-sealing back sealing bag has the effect of reducing the probability of defective products formed by heat-sealing the back sealing bag.

Description

Technical Field

[0001] The present application relates to the technical field of back-sealed bags, and in particular to a back-sealed bag adjusting device. Background Art

[0002] Back-seal bags, also known as center-seal bags, are a special term in the packaging industry. Simply put, they are packaging bags with sealed edges on the back of the bag. Back-seal bags have a very wide range of applications. Generally, candies, bagged instant noodles, bagged dairy products, etc. all use this type of packaging.

[0003] The authorization announcement No. CN205255592U discloses a folding mechanism of a center-sealed bag-making machine, comprising a pressing device, a pre-folding device, a folding device, and a pressing device; the pressing device is located above the composite film, and its bottom can be pressed down to the upper surface of the middle part of the composite film; the pre-folding device is symmetrically arranged on both sides of the composite film to pre-press the two sides of the composite film after being pressed by the pressing device; the folding device is symmetrically arranged on both sides of the composite film to fold the two sides of the composite film after being pre-pressed by the pre-folding device; the pressing device is staggered on both sides of the composite film to press down and shape the two folding areas of the composite film after being folded by the folding device.

[0004] With regard to the above-mentioned technical solution, during the process of bending the composite film by the pre-folding and pressing device, the two sides of the composite film are bent simultaneously. The two sides of the composite film bent at the same time are easy to abut against each other. Subsequently, when the edge pressing device flattens it, it is easy for one of the sides to be bent and then folded with the other side. Due to the bending of one side, the overlapping part of the two sides after folding is reduced, thereby reducing the heat sealing area, resulting in poor heat sealing effect of the back-sealed bag and the formation of defective products. Utility Model Content

[0005] In order to reduce the probability of defective back-sealed bags being formed after heat sealing, the present application proposes a back-sealed bag production adjustment device.

[0006] The back-sealed bag adjustment device provided in this application adopts the following technical solution:

[0007] A back-sealed bag production and adjustment device comprises a horizontally arranged workbench, on which a folding mechanism is arranged, the folding mechanism comprises a pre-pressing device, a folding and pressing device and an edge pressing device which are sequentially installed along the length direction of the workbench, the folding mechanism folds and shapes both sides of a composite film, a gantry is arranged at one end of the workbench close to the length direction, a connecting rod is arranged on the gantry facing the side of the workbench, a lower pressing plate is connected to the end of the connecting rod away from the gantry, the lower pressing plate is arranged between the workbench and the folding mechanism, the lower pressing plate is arranged along the length direction of the workbench, a guide portion is arranged between the connecting rod and the lower pressing plate, and an abutment block is arranged on one side of the guide portion in the width direction.

[0008] By adopting the above technical scheme, when the pre-pressing device of the folding mechanism folds both sides of the composite film toward the middle of the lower pressure plate, one of the side edges of the composite film abuts against the abutting block when folding, and the side edge of the composite film that does not abut against the abutting block is folded toward the lower pressure plate and abuts against the lower pressure plate under the action of the pre-pressing device and the folding device. The side edge abutting against the abutting block is folded and falls on the lower pressure plate later than the side edge that does not abut against the abutting block due to the abutting block. Under the action of the folding mechanism, both side edges of the composite film fall on the surface of the lower pressure plate and form an overlapping part with a certain width, thereby reducing the phenomenon that both side edges of the composite film are folded at the same time under the action of the folding mechanism, resulting in one side being pressed and bent and then folded with the other side until the overlapping part of the last two sides after folding is reduced, thereby reducing the probability of poor heat sealing effect and defective products due to the reduction of heat sealing area.

[0009] Preferably, the workbench is provided with a deflection reducing plate, which is arranged on the workbench on the side of the folding mechanism away from the gantry, one end of the deflection reducing plate is fixed on the workbench on the side away from the abutment block in the width direction of the guide part, and the other end of the deflection reducing plate extends to above the middle part of the lower pressure plate.

[0010] By adopting the above technical scheme, for the overlapping part after being folded and formed by the folding mechanism, if there are wrinkles caused by downward pressure during forming or wrinkles on the side that does not abut against the abutment block during folding, the deflection reducing plate is installed between the folded part and the surface of the lower pressure plate. The deflection reducing plate flattens the folded part of the side that does not abut against the abutment block, thereby reducing its adverse effects in the subsequent heat sealing process.

[0011] Preferably, a secondary shaping plate is provided on the workbench, the secondary shaping plate is arranged at the end of the deflection reducing plate away from the gantry, the secondary shaping plate is arranged along the width direction of the workbench, and the secondary shaping plate is arranged on the side of the lower pressure plate away from the workbench.

[0012] By adopting the above technical solution, the deflection reducing plate flattens the folded part while also causing a certain bulge in the overlapping part after being shaped by the folding mechanism. The secondary shaping plate can flatten and shape the generated bulge to facilitate subsequent heat sealing.

[0013] Preferably, the guide portion is arranged along the length direction of the lower pressing plate, the guide portion is arranged in the middle of the width direction of the lower pressing plate, and the abutment block is detachably installed on one side of the guide portion in the width direction.

[0014] By adopting the above technical solution, the abutment block can be detachably arranged so that a suitable abutment block can be selected according to the size of the folded edge of the composite film.

[0015] Preferably, a plurality of mounting holes are provided in the length direction of the guide portion, and a positioning bolt is provided between the abutment block and the guide portion, and the positioning bolt passes through the abutment block and is inserted into one of the mounting holes.

[0016] By adopting the above technical scheme, the abutment block is installed on different mounting holes through positioning bolts to realize the adjustment of the abutment block on the guide part, thereby adjusting the time period of the abutment block when the composite membrane is folded, thereby adjusting the offset time point of the folding time of the two side edges of the composite membrane, making the folding of the folded edge more precise, and further reducing the probability of the two side edges of the composite membrane abutting each other.

[0017] Preferably, a mounting seat is slidably provided on the gantry, the mounting seat slides along the length direction of the gantry, and the connecting rod is connected to the mounting seat toward one end of the gantry.

[0018] By adopting the above technical solution, the sliding movement of the mounting seat can adjust the position of the guide portion on the width of the composite film, so that the guide portion can be adjusted according to the folding position of the composite film.

[0019] Preferably, the mounting seat is provided with a sliding hole along the height direction, the connecting rod is slidably installed in the sliding hole, and the connecting rod slides along the height direction of the sliding hole toward away from or close to the gantry.

[0020] By adopting the above technical solution, the height of the guide part is adjusted by adjusting the height of the connecting rod, so that the lower pressure plate can be adjusted according to the thickness of the composite film, thereby adjusting the gap between the lower pressure plate and the workbench, so that the lower pressure plate can be suitable for composite films of different thicknesses.

[0021] Preferably, sliding components are arranged between the pre-pressing device, folding device, edge pressing device, deflection reducing plate and secondary shaping plate and the workbench, and the sliding components respectively drive the pre-pressing device, folding device, edge pressing device, deflection reducing plate and secondary shaping plate to slide towards or away from the workbench.

[0022] By adopting the above technical scheme, the distance between the pre-pressing device, the folding device, the edge holding device, the deflection reducing plate and the secondary shaping plate and the mounting table is adjusted by the sliding assembly, so that they can be adjusted according to the composite films of different thicknesses, making the pre-pressing device, the folding device, the edge holding device, the deflection reducing plate and the secondary shaping plate suitable for composite films of different thicknesses.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the pre-pressing device of the folding mechanism folds both sides of the composite film toward the middle of the lower pressing plate, one of the side edges of the composite film abuts against the abutting block when folding, and the side edge of the composite film that does not abut against the abutting block is folded toward the lower pressing plate and abuts against the lower pressing plate under the action of the pre-pressing device and the folding device. The side edge abutting against the abutting block is folded and falls on the lower pressing plate later than the side edge that does not abut against the abutting block due to the abutting block. Under the action of the folding mechanism, both sides of the composite film fall on the surface of the lower pressing plate and form an overlapping part with a certain width, thereby reducing the phenomenon that the two sides of the composite film are folded at the same time under the action of the folding mechanism, resulting in one side being pressed and bent and then folded with the other side until the overlapping part of the last two sides after folding is reduced, thereby reducing the probability of poor heat sealing effect and defective products due to the reduction of heat sealing area;

[0025] 2. For the overlapping part after folding and shaping by the folding mechanism, if there are wrinkles caused by downward pressure during shaping or wrinkles on the side that does not abut against the abutment block during folding and pressing, the deflection reducing plate is installed between the folded part and the surface of the lower pressure plate. The deflection reducing plate flattens the folded part of the side that does not abut against the abutment block to reduce its adverse effects in the subsequent heat sealing process;

[0026] 3. The abutment block can be detachably arranged so that a suitable abutment block can be selected according to the size of the folded edge of the composite film;

[0027] 4. The abutment blocks are installed on different mounting holes by positioning bolts to adjust the abutment blocks on the guide part, thereby adjusting the time period of the abutment blocks when the composite film is folded, thereby adjusting the offset time point of the folding time of the two sides of the composite film, making the folding of the folded edge more accurate, and further reducing the probability of the two sides of the composite film abutting against each other;

[0028] 5. The sliding movement of the mounting seat can adjust the position of the guide portion on the width of the composite film, thereby adjusting the guide portion according to the folding position of the composite film. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0030] Figure 2 It is a schematic diagram of the overall structure of this embodiment from another perspective.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. workbench; 2. folding mechanism; 21. pre-pressing device; 211. pre-pressing platform; 212. pre-pressing rod; 22. folding device; 221. folding platform; 222. folding rod; 223. folding wheel; 23. edge pressing device; 231. edge pressing platform; 232. edge pressing rod; 233. edge pressing wheel; 3. gantry; 4. connecting rod; 5. lower pressure plate; 6. guide part; 7. abutment block; 8. deflection reduction platform; 9. deflection reduction plate; 10. secondary shaping plate; 11. mounting hole; 12. positioning bolt; 13. mounting seat; 14. sliding hole; 15. sliding assembly; 151. sliding frame; 152. sliding bolt. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-2 This application is described in further detail.

[0033] The present application embodiment discloses a back-sealed bag production and adjustment device, referring to Figure 1 , including a rectangular workbench 1 horizontally erected on the ground by supporting legs, a folding mechanism 2 is installed on the workbench 1, and the folding mechanism 2 includes a pre-pressing device 21, a folding device 22 and a pressing device 23 installed in sequence along the length direction of the workbench 1, the pre-pressing device 21 includes two pre-pressing platforms 211 respectively arranged at both ends of the width direction of the workbench 1 and two pre-pressing rods 212 respectively installed on the pre-pressing platforms 211, one end of the pre-pressing rod 212 is slidably inserted on the pre-pressing platform 211, and the other end is tilted on the workbench 1, one sliding end of the pre-pressing rod 212 is fixed to the pre-pressing platform 211 by bolts, and loosening the bolts allows the two pre-pressing rods 212 to slide toward or away from each other, and one tilted end of the two pre-pressing rods 212 is set toward the center of the workbench 1, and the composite film is guided to be bent through the shrunken pre-pressing rods 212; the folding device 22 includes two folding platforms 221 respectively arranged on both sides of the width direction of the workbench 1, and two pre-pressing rods 212 respectively slidably arranged on the folding platforms 221. Two folding rods 222 and two folding wheels 223 rotatably arranged on the folding rods 222, the folding rods 222 are fixed on the folding platform 221 by bolts, and the bolts are loosened to make the two folding rods 222 slide toward or away from each other on the folding platform 221, and the folding wheels 223 are rotatably arranged at the opposite ends of the folding rods 222, and the folding wheels 223 guide the bent composite film to turn over, and the edge pressing device 23 includes edge pressing platforms 231 and 232 respectively arranged on both sides of the width direction of the workbench 1. The edge pressing rods 232 are slidingly arranged on the edge pressing platform 231, and the edge pressing wheels 233 are rotatably arranged on the edge pressing rods 232. The edge pressing rods 232 are fixed to the edge pressing platform 231 by bolts. The bolts are loosened to allow the two edge pressing rods 232 to slide toward or away from each other on the edge pressing platform 231. The edge pressing wheels 233 are rotatably arranged at the opposite ends of the edge pressing rods 232. The edge pressing wheels 233 press and shape the folded composite film, and the two sides of the composite film are folded and shaped by the folding mechanism 2.

[0034] Reference Figure 1 A gantry 3 is provided at one end of the workbench 1 near the length direction, a connecting rod 4 is provided on the side of the gantry 3 facing the workbench 1, and a lower pressing plate 5 is connected to the end of the connecting rod 4 away from the gantry 3. A gap is set between the lower pressing plate 5 and the workbench 1 to facilitate the composite film to pass between the lower pressing plate 5 and the workbench 1. The lower pressing plate 5 is set between the workbench 1 and the folding mechanism 2, and the pre-pressing rod 212, the folding wheel 223 and the edge pressing wheel 233 are all set with gaps to facilitate the composite film after folding to pass between the lower pressing plate 5 and the folding mechanism 2. The lower pressing plate 5 is set along the length direction of the workbench 1, and a guide part 6 is installed between the connecting rod 4 and the lower pressing plate 5. An abutment block 7 is installed on one side of the guide part 6 in the width direction. When the pre-pressing device 21 of the folding mechanism 2 folds both sides of the composite film toward the middle of the lower pressing plate 5 When the pre-pressing device 21 and the folding device 22 are used, one of the side edges of the composite film abuts against the abutting block 7 when folding, and the side edge of the composite film that does not abut against the abutting block 7 is folded toward the lower pressure plate 5 and abuts against the lower pressure plate 5. The side edge abutting against the abutting block 7 abuts against the abutting block 7, so that it is folded and falls on the lower pressure plate 5 later than the side edge that does not abut against the abutting block 7. Under the action of the folding mechanism 2, both side edges of the composite film fall on the surface of the lower pressure plate 5 and form an overlapping part with a certain width, thereby reducing the phenomenon that both side edges of the composite film are folded at the same time under the action of the folding mechanism 2, resulting in one side being pressed and bent and then folded with the other side until the overlapping part of the last two sides after folding is reduced, thereby reducing the probability of poor heat sealing effect and defective products due to the reduction of the heat sealing area.

[0035] Reference Figure 1 A deflection reduction platform 8 is provided on the workbench 1, and a deflection reduction plate 9 is slidably provided on the deflection reduction platform 8. The deflection reduction plate 9 is arranged on the workbench 1 on the side of the folding mechanism 2 away from the gantry 3. One end of the deflection reduction plate 9 is fixed on the workbench 1 on the side of the guide portion 6 away from the abutment block 7 in the width direction, and the other end of the deflection reduction plate 9 extends to the upper part of the middle of the lower pressing plate 5. For the overlapping part after folding and shaping by the folding mechanism 2, there are wrinkles caused by downward pressure during shaping or wrinkles on the side that is not in contact with the abutment block 7 during folding and pressing. The deflection reduction plate 9 is installed between the folded part and the surface of the lower pressing plate 5. The deflection reduction plate 9 flattens the folded part of the side that is not in contact with the abutment block 7 to reduce its generation in the subsequent heat sealing process. In order to avoid the adverse effects, the deflection reducing plate 9 is fixed on the deflection reducing platform 8 by bolts. Loosening the bolts allows the deflection reducing plate 9 to slide on the deflection reducing platform 8 along the width direction of the workbench 1, thereby adjusting the deflection range of the deflection reducing plate 9; a secondary shaping plate 10 is provided on the workbench 1, and the secondary shaping plate 10 is arranged at the end of the deflection reducing plate 9 away from the gantry 3. The secondary shaping plate 10 is arranged along the width direction of the workbench 1, and the secondary shaping plate 10 is arranged on the side of the lower pressure plate 5 away from the workbench 1. The deflection reducing plate 9 flattens the folded part and also makes the overlapping part after being shaped by the folding mechanism 2 produce a certain bulge. The secondary shaping plate 10 can flatten and shape the generated bulge, which is convenient for subsequent heat sealing.

[0036] Reference Figure 1 and Figure 2 The guide portion 6 is arranged along the length direction of the lower pressing plate 5, and the guide portion 6 is arranged in the middle of the width direction of the lower pressing plate 5. The abutment block 7 can be detachably installed on one side of the width direction of the guide portion 6; a plurality of mounting holes 11 are opened in the length direction of the guide portion 6, and a positioning bolt 12 is arranged between the abutment block 7 and the guide portion 6. The positioning bolt 12 penetrates the abutment block 7 and is inserted into one of the mounting holes 11

[0037] Reference Figure 1 A mounting seat 13 is slidingly provided on the gantry 3, and the mounting seat 13 slides along the length direction of the gantry 3. The connecting rod 4 is connected to the mounting seat 13 at one end toward the gantry 3. The sliding of the mounting seat 13 can adjust the position of the guide part 6 on the width of the composite film, thereby adjusting the guide part 6 according to the folding position of the composite film.

[0038] Reference Figure 1 The mounting seat 13 is provided with a sliding hole 14 along the height direction, and the connecting rod 4 is slidably installed in the sliding hole 14, and the connecting rod 4 slides along the height direction of the sliding hole 14 toward or away from the gantry 3; a sliding assembly 15 is arranged between the pre-pressing device 21, the folding device 22, the edge pressing device 23, the deflection reduction plate 9 and the secondary shaping plate 10 and the workbench 1, and the sliding assembly 15 includes a sliding frame 151 installed on the workbench 1 and a sliding bolt 152 rotatably arranged on the sliding frame 151, and the sliding bolts 152 corresponding to the pre-pressing device 21, the folding device 22, the edge pressing device 23, the deflection reduction plate 9 and the secondary shaping plate 10 are respectively threadedly connected with the pre-pressing table 211, the folding table 221, the edge pressing table 231, the deflection reduction table 8 and the secondary shaping plate 10, driving the pre-pressing table 211, the folding table 221, the edge pressing table 231, the deflection reduction table 8 and the secondary shaping plate 10 in the sliding frame 151 Sliding, so that the sliding assembly 15 drives the pre-pressing device 21, the folding device 22, the edge holding device 23, the deflection reducing plate 9 and the secondary shaping plate 10 to slide towards or away from the workbench 1 respectively; by adjusting the height of the connecting rod 4, the height of the guide part 6 is adjusted to adjust the lower pressing plate 5 according to the thickness of the composite film, thereby adjusting the gap between the lower pressing plate 5 and the workbench 1, so that the lower pressing plate 5 can be suitable for composite films of different thicknesses. After the height of the lower pressing plate 5 is adjusted, the gap between the lower pressing plate 5 and other mechanisms will be reduced, and the pre-pressing device 21, the folding device 22, the edge holding device 23, the deflection reducing plate 9 and the secondary shaping plate 10 can be adjusted to slide towards or away from the workbench 1, and the gap between the pre-pressing device 21, the folding device 22, the edge holding device 23, the deflection reducing plate 9, the secondary shaping plate 10 and the lower pressing plate 5 can be adjusted according to the thickness of the composite film.

[0039] The implementation principle of the embodiment of the present application is as follows: according to the thickness of the composite film to be processed, the gap between the lower pressing plate 5 and the workbench 1 and the gap between the pre-pressing device 21, the folding device 22, the edge pressing device 23, the deflection reducing plate 9, the secondary shaping plate 10 and the lower pressing plate 5 are adjusted, and then the film is fed into the workbench 1, and the film enters the workbench 1 from the gap between the lower pressing plate 5 and the workbench 1, and then the two side edges of the film are bent under the guidance of the pre-pressing rod 212, and then turned over by the guidance of the folding wheel 223, and the shaping ring body is formed by the edge pressing wheel 233. When bending, due to the presence of the abutment block 7, the time when one side is bent and turned over is later than the other side, thereby reducing the probability of the two sides being bent and turned over at the same time, and reducing the probability of one side being bent and turned over by the other side. After the shaping, the composite film is adjusted by the deflection reducing plate 9, shaped by the secondary shaping plate 10, and then sent to the heat sealing mechanism for heat sealing, thereby completing the edge sealing of the back of the back-sealed bag.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A back-sealed bag production and adjustment device, comprising a horizontally arranged workbench (1), the workbench (1) being provided with a folding mechanism (2), the folding mechanism (2) comprising a pre-pressing device (21), a folding and pressing device (22) and a side pressing device (23) sequentially installed along the length direction of the workbench (1), the folding mechanism (2) folding and shaping both sides of a composite film, the workbench (1) being provided with a gantry (3) at one end close to the length direction, the gantry (3) being provided with a connecting rod (4) on the side facing the workbench (1), the connecting rod (4) being connected with a lower pressing plate (5) at one end away from the gantry (3), the lower pressing plate (5) being arranged between the workbench (1) and the folding mechanism (2), the lower pressing plate (5) being arranged along the length direction of the workbench (1), characterized in that: A guide portion (6) is provided between the connecting rod (4) and the lower pressing plate (5), and an abutment block (7) is provided on one side in the width direction of the guide portion (6).

2. The back-sealed bag production and adjustment device according to claim 1, characterized in that: The workbench (1) is provided with a deflection reducing plate (9), which is arranged on the workbench (1) at the side of the folding mechanism (2) away from the gantry (3), one end of the deflection reducing plate (9) is fixed on the workbench (1) at the side of the guide portion (6) away from the abutment block (7) in the width direction, and the other end of the deflection reducing plate (9) extends to the upper middle part of the lower pressing plate (5).

3. The back-sealed bag production and adjustment device according to claim 1, characterized in that: The workbench (1) is provided with a secondary shaping plate (10), the secondary shaping plate (10) being arranged at the end of the deflection reducing plate (9) away from the gantry (3), the secondary shaping plate (10) being arranged along the width direction of the workbench (1), and the secondary shaping plate (10) being arranged at the side of the lower pressing plate (5) away from the workbench (1).

4. The back-sealed bag production and adjustment device according to claim 1, characterized in that: The guide portion (6) is arranged along the length direction of the lower pressing plate (5), the guide portion (6) is arranged in the middle of the width direction of the lower pressing plate (5), and the abutment block (7) is detachably mounted on one side of the guide portion (6) in the width direction.

5. The back-sealed bag production and adjustment device according to claim 1, characterized in that: The guide portion (6) is provided with a plurality of mounting holes (11) in the length direction, and a positioning bolt (12) is provided between the abutment block (7) and the guide portion (6), and the positioning bolt (12) passes through the abutment block (7) and is inserted into one of the mounting holes (11).

6. The back-sealed bag production and adjustment device according to claim 1, characterized in that: A mounting seat (13) is slidably provided on the gantry (3), the mounting seat (13) slides along the length direction of the gantry (3), and the connecting rod (4) is connected to the mounting seat (13) at one end facing the gantry (3).

7. The back-sealed bag production and adjustment device according to claim 6, characterized in that: The mounting seat (13) is provided with a sliding hole (14) along the height direction, the connecting rod (4) is slidingly mounted in the sliding hole (14), and the connecting rod (4) slides along the height direction of the sliding hole (14) towards away from or towards the gantry (3).

8. The back-sealed bag production and adjustment device according to claim 1, characterized in that: A sliding assembly (15) is provided between the pre-pressing device (21), the folding device (22), the edge pressing device (23), the deflection reducing plate (9) and the secondary shaping plate (10) and the workbench (1), and the sliding assembly (15) drives the pre-pressing device (21), the folding device (22), the edge pressing device (23), the deflection reducing plate (9) and the secondary shaping plate (10) to slide towards or away from the workbench (1).

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