A process for manufacturing bags with soft handles

Abstract

The present invention discloses a process for manufacturing bags with soft handles, which is characterized by the following steps: 1) The upper film and the lower film are conveyed along the production line direction; 2) Punch holes on the side of the handle; 3) Insert the soft handle film material between the upper film and the lower film on the side of the handle, and convey it along the production line direction under the clamping of the upper film and the lower film; 4) Heat-seal the heat-sealing area at the upper opening of the bag body and the heat-sealing connection area of the soft handle simultaneously or separately; 5) Heat-seal the side of the bag body, and the side heat-sealing area is perpendicular to the production line direction; 6) Round the corners of the combined film; 7) Cut the combined film into bags. Through such a bag-making process, bags can be produced efficiently and the quality of the bags can be ensured.

Description

Technical Field

[0001] The present invention relates to a process for manufacturing bags with soft handles. Background Art

[0002] For some existing bags, such as rice bags, hard handles are usually fixed above the bag body. When consumers lift the bags, due to the limited contact area of the hard handles, they will feel hand pain after a long time. In the prior art, a handle made of a relatively soft material is used to replace the hard handle. For example, in the bag disclosed in Patent 2020203082.0, the comfort level will be improved when lifting. In the prior art bag manufacturing process, the soft handle is manually stuffed into the middle of the bag body, resulting in low production efficiency. There is an urgent need in the prior art for a soft handle bag manufacturing process with high production efficiency and good bag body quality. Summary of the Invention

[0003] The object of the present invention is to overcome the defects existing in the prior art and provide a soft handle bag manufacturing process with high production efficiency and good bag body quality.

[0004] To achieve the above object, the technical solution of the present invention provides a soft handle bag manufacturing process, including the following steps:

[0005] 1). The upper film and the lower film are conveyed along the pipeline direction and combined into a double-layer film during conveyance, defined as the combined film. One side edge of the combined film is the handle side edge, and the other side edge is the bag bottom side edge;

[0006] 2) Punch holes in the handle side edge to form handle holes. The combined film area between the handle holes along the pipeline direction is the soft handle heat-sealing connection area. Inside the handle holes and the soft handle heat-sealing connection area, there is a bag body upper mouth heat-sealing area;

[0007] 3). Stuff the soft handle film material between the upper film and the lower film on the handle side edge and convey it along the pipeline direction under the clamping of the upper film and the lower film. The soft handle film material is exposed at the handle hole position, and the soft handle film material is clamped by the upper film and the lower film in the soft handle heat-sealing connection area;

[0008] 4). Heat-seal the bag body upper mouth heat-sealing area and the soft handle heat-sealing connection area simultaneously or separately;

[0009] 5). Heat-seal the side edges of the bag body. The side edge heat-sealing area is perpendicular to the pipeline direction;

[0010] 6). Cut the rounded corners of the combined film;

[0011] 7). Cut the combined film into bags.

[0012] Through such a bag manufacturing process, bags can be produced efficiently and the quality of the bags can be guaranteed.

[0013] In step 1), the upper film and the lower film are cut from the same main film along the center line; the main film is arranged on the main film reel and is combined after passing through the main film feeding component and the main film slitting component.

[0014] Through such a design, a film feeding structure can be saved. The upper film and the lower film are both cut from the main film, and the film forming is relatively simple.

[0015] Preferably, the main film feeding component includes a main film guiding roller group connected to the main film reel, a main film constant tension swing arm roller group, a main film transition roller, a main film turning inclined rod, a main film vertical deviation correcting roller, a main film unwinding vertical traction roller, and a main film slitting guiding vertical roller that cooperate with the main film guiding roller group;

[0016] Through such a design, such a design of the main film feeding component is an optimization of the solution.

[0017] The main film slitting component includes a slitting blade connected to the main film slitting guiding vertical roller. Upper film turning inclined rods are arranged on both sides of the slitting blade, and lower film turning inclined rods perpendicular to the upper film turning inclined rods are provided; the main film is slit into an upper film and a lower film by the slitting blade; the upper film passes through the upper film turning inclined rod and the upper film turning roller and then converges into the upper and lower deviation adjusting roller group, and the lower film passes through the lower film turning inclined rod and the lower film turning roller and then converges into the upper and lower deviation adjusting roller group; after the upper film and the lower film are adjusted for deviation in the upper and lower deviation adjusting roller group, they sequentially pass through the upper and lower tension adjusting roller group, the film combining roller group, and then cooperate with the first servo traction roller group for film combining;

[0018] The upper and lower deviation adjusting roller group is a pair of parallel roller groups, including an upper deviation adjusting roller and a lower deviation adjusting roller. The upper deviation adjusting roller and the lower deviation adjusting roller move synchronously. The upper film is discharged from the upper film turning roller and cooperates with the upper deviation adjusting roller; the lower film is discharged from the lower film turning roller and cooperates with the lower deviation adjusting roller; there is a certain gap between the upper deviation adjusting roller and the lower deviation adjusting roller.

[0019] The upper and lower tension adjusting roller group includes an upper film tension adjusting roller group and a lower film tension adjusting roller group. The upper film tension adjusting roller group includes two upper film transition rollers and an upper film swing arm roller between the two upper film transition rollers. The lower film tension adjusting roller group includes two lower film transition rollers and a lower film swing arm roller between the two lower film transition rollers. The upper film swing arm roller and the lower film swing arm roller are preferably connected to a swing arm.

[0020] The film combining roller group is a pair of rollers arranged in sequence along the pipeline direction. The upper film combining roller cooperates with the upper film, and the lower film combining roller cooperates with the lower film. The upper film combining roller is slightly lower in horizontal height than the lower film combining roller. The upper film and the lower film are combined into one under the action of the film combining roller group.

[0021] The first servo traction roller group for film combining is a pair of rollers that provides the power for film combining and conveying.

[0022] Preferably, the soft handle film material is formed by folding a main soft handle film in half. The folded soft handle film material includes a folded opening edge and a folded bottom edge. When the soft handle film material is inserted between the upper film and the lower film on the side of the handle, the folded opening edge faces outward, and the folded bottom edge faces the heat-sealing area at the upper opening of the bag body.

[0023] With such a design, the formation of the soft handle film material is relatively simple.

[0024] Preferably, the insertion of the soft handle film material between the upper film and the lower film on the side of the handle is achieved through a guiding triangular surface. The top angle of the guiding triangular surface is inserted between the upper film and the lower film, and the insertion depth is outside the heat-sealing area at the upper opening of the bag body. The main soft handle film material is input from the bottom edge of the guiding triangular surface and output from the top angle of the guiding triangular surface. After being output from the top angle of the guiding triangular surface, they gather together. A pair of folding counter-rollers is arranged at the output end of the top angle. The folding counter-rollers are inserted between the upper film and the lower film to close the upper and lower folded opening edges, forming the soft handle film material. The center line of the top angle end of the guiding triangular surface coincides with the center line of the main soft handle film material. The inner end of the folding counter-rollers should extend from the heat-sealing connection area of the soft handle to within the heat-sealing area at the upper opening of the bag body.

[0025] With such a design, through the cooperation of the guiding triangular surface and the folding counter-rollers, the main soft handle film material is folded in half to form the soft handle film material, which is then formed and inserted between the upper film and the lower film. The film formation is ingenious and the structure is simple.

[0026] A pair of folding and film-combining roller groups is arranged at the discharge end of the folding counter-rollers. The folding and film-combining roller groups are a pair of rollers arranged in sequence along the production line direction. The upper folding and film-combining roller cooperates with the upper film, and the lower folding and film-combining roller cooperates with the lower film. The upper folding and film-combining roller is slightly lower in horizontal height than the lower folding and film-combining roller. Under the action of the folding and film-combining roller groups, the upper film, the soft handle film material, and the lower film are combined into one body.

[0027] With such a design, the soft handle film material can be quickly combined with the upper film and the lower film into one body.

[0028] The insertion of the soft handle film material between the upper film and the lower film on the side of the handle is achieved through a soft handle film material insertion assembly. The soft handle film material insertion assembly includes a soft handle film material reel, a soft handle film material guiding roller group, a soft handle film material constant tension swing arm roller group cooperating with the soft handle film material guiding roller group, a soft handle film material transition roller, a soft handle film material turning diagonal rod, a soft handle film material feeding and traction roller group, a soft handle film material feeding guiding roller group, a soft handle film material feeding swing arm roller group cooperating with the soft handle film material feeding guiding roller group, a triangular surface connecting roller, a triangular surface, and folding counter-rollers.

[0029] Such a design is an optimization of the structure of the soft handle film material insertion assembly.

[0030] Preferably, in step 4), the upper heat-sealing area of the bag body is heat-sealed first, and then the heat-sealing connection area of the soft handle is heat-sealed; when heat-sealing the upper heat-sealing area of the bag body, it is first heat-ironed by the hot knife assembly and then cooled by the cooling assembly;

[0031] The heat-sealing connection area of the soft handle is first heat-ironed by the hot knife assembly and then cooled by the cooling assembly, and the heat-ironing is carried out two or more times.

[0032] Through such a design, such a heat-ironing design ensures the heat-ironing effect, and at the same time prevents the surface from wrinkling through cooling.

[0033] Preferably, in step 5), it is first heat-ironed by the hot knife assembly and then cooled by the cooling assembly; one end of the side heat-sealing area is connected to the upper heat-sealing area of the bag body, and a transition rounded corner structure is formed at the connection position; the other end of the side heat-sealing area extends to the side of the bag bottom, and there is a closing convex structure near the side of the bag bottom. A transition rounded corner structure is formed between the closing convex structure and the main body of the side heat-sealing area.

[0034] Through such a design, a smooth transition is formed at the corner position between the inside of the bag body and the filling material, avoiding a right-angle transition. In the case of a heavy filling material, the bag body is likely to be damaged due to concentrated pressure.

[0035] The heat-ironing components for heat-sealing the side of the bag body include multiple groups of heat-ironing assemblies. Each group of heat-ironing assemblies includes a hot knife and a backing plate. The positional relationship between the hot knife and the backing plate is that the hot knife is above and the backing plate is below, or the hot knife is below and the backing plate is above. The above two positional relationships are alternately arranged along the film combining and transporting direction. Preferably, there are four groups of multiple heat-ironing assemblies.

[0036] Before step 5), the waste edges of the combined film are cut.

[0037] Through such a design, the soft handle film material, the upper film and the lower film can be firmly heat-ironed into one body without wrinkling. Interchanging the positions of the hot knife and the backing plate can improve the firmness of the heat-ironing position and make the heat reception more uniform.

[0038] The advantages and beneficial effects of the present invention are as follows: Through such a bag-making process, the bag body can be efficiently produced and the quality of the bag body can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the bag-making process for the soft handle (side view perspective);

[0040] Figure 2 For Figure 1 The enlarged schematic diagram at A in

[0041] Figure 3 For Figure 1 The enlarged schematic diagram at B in

[0042] Figure 4 is Figure 1 An enlarged view of location C in

[0043] Figure 5 is Figure 1 An enlarged view of location D in

[0044] Figure 6 is Figure 1 An enlarged view of location E in

[0045] Figure 7 Schematic diagram of the soft handle bag-making process (stereoscopic view);

[0046] Figure 8 is Figure 7 An enlarged view of location F in

[0047] Figure 9 is Figure 7 An enlarged view of location G in

[0048] Figure 10 is Figure 7 An enlarged view of location H in

[0049] Figure 11 is Figure 7 An enlarged view of location J in

[0050] Figure 12 is Figure 11 An enlarged view of location K in

[0051] Figure 13 is Figure 11 An enlarged view of location L in

[0052] Figure 14 Enlarged view of the soft handle film feeding assembly;

[0053] Figure 15 Enlarged view of the soft handle film feeding assembly (upper and lower films omitted);

[0054] Figure 16 Enlarged view of the soft handle film feeding assembly (upper and lower films omitted, another angle);

[0055] Figure 17 Enlarged view of the main film feeding assembly and the main film slitting assembly;

[0056] Figure 18 Enlarged view of the soft handle film feeding assembly (another perspective).

[0057] In the figure: 1, main film; 2, upper film; 3, lower film; 4, closing film; 5, handle side; 6, bag bottom side; 7, handle hole; 701, handle hole punching assembly; 702, cutting knife; 8, soft handle hot connection area; 9, bag upper heat sealing area; 10, side heat sealing area; 1001, side heat sealing area center line; 11, main film roll; 12, main film guide roller group; 13, main film constant tension swing arm roller group; 14, main film transition roller; 15, main film steering diagonal rod; 16, main film vertical deviation correction roller; 17, main film edge adjustment sensor; 18, main film unwinding vertical roller; Traction roller; 19, main film slitting guide vertical roller; 20, slitting blade; 21, upper film steering diagonal rod; 22, upper film steering roller; 23, lower film steering diagonal rod; 24, lower film steering roller; 25, upper and lower deflection adjustment roller group; 26, upper deflection adjustment roller; 27, lower deflection adjustment roller; 28, lateral adjustment active end; 29, lateral adjustment reference end; 30, gap; 31, bag body; 32, color mark; 33, upper and lower tension adjustment roller group; 34, film closing roller group; 35, film closing first servo traction roller group; 36, upper film transition roller; 37, upper film swing arm roller; 38, lower film transition roller; 3 9. Lower film swing arm roller; 40. Upper film closing roller; 41. Lower film closing roller; 42. Main film of soft handle; 421. Film material of soft handle; 43. Folding opening edge; 44. Folding bottom edge; 45. Guide triangle surface; 46. Top angle of guide triangle surface; 47. Bottom edge of guide triangle surface; 48. Side edge of guide triangle surface; 49. Upper edge of folding opening; 50. Lower edge of folding opening; 51. Folding film roller group; 52. Upper folding film roller; 53. Lower folding film roller; 54. Film material roll of soft handle; 55. Guide roller group of soft handle film; 56. Constant tension swing arm of soft handle film Roller group; 57, transition roller for soft handle film material; 58, diagonal rod for turning film material for soft handle; 59, traction roller group for unloading film material for soft handle; 60, guide roller group for unloading film material for soft handle; 61, swing arm roller group for unloading film material for soft handle; 62, triangular surface connecting roller; 63, ironing knife assembly; 64, cooling assembly; 65, transition fillet structure; 66, closing raised structure; 67, ironing knife; 68, pad; 69, fillet punch; 70, triangular notch; 71, arc edge; 72, driving roller assembly; 73, color mark sensor; 74, floating roller group; 75, folding roller. DETAILED DESCRIPTION

[0058] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0059] like Figures 1 - 18 As shown, Example 1:

[0060] A soft handle bag making process, characterized by comprising the following steps:

[0061] 1), The upper film 2 and the lower film 3 are conveyed along the production line direction. When being conveyed, they are combined into a double-layer film, defined as the combined film 4. One side edge of the combined film 4 is the handle side edge 5, and the other side edge is the bag bottom side edge 6;

[0062] 2) Punch holes in the handle side edge 5 to form handle holes 7. The area of the combined film 4 between the handle holes 7 along the production line direction is the soft handle heat-sealing connection area 8. Inside the handle holes 7 and the soft handle heat-sealing connection area 8, there is a bag body upper mouth heat-sealing area 9;

[0063] 3), Stuff the soft handle film material between the upper film 2 and the lower film 3 of the handle side edge 5, and convey it along the production line direction under the clamping of the upper film 2 and the lower film 3. The soft handle film material is exposed at the position of the handle holes 7, and the soft handle film material is clamped by the upper film 2 and the lower film 3 in the soft handle heat-sealing connection area 8;

[0064] 4), Heat-seal the bag body upper mouth heat-sealing area 9 and the soft handle heat-sealing connection area 8 simultaneously or separately;

[0065] 5), Heat-seal the side edges of the bag body. The side edge heat-sealing area 10 is perpendicular to the production line direction;

[0066] 6), Cut the rounded corners of the combined film 4;

[0067] 7), Cut the combined film 4 into bags, which is completed by the cutting knife 702. Form the bag body 31. The bottom edge of the bag body 31, that is, the bag bottom side edge 6, is in an open state, and the bottom edge is sealed after filling materials later.

[0068] In the step 1), the upper film 2 and the lower film 3 are cut from the same main film 1 along the center line; the main film 1 is arranged on the main film material roll 11 and forms the combined film 4 after passing through the main film feeding component and the main film cutting component.

[0069] The main film feeding component includes a main film guiding roller group 12 connected to the main film material roll 11, and a main film constant tension swing arm roller group 13, a main film transition roller 14, a main film turning inclined rod 15, a main film vertical deviation correcting roller 16, a main film unwinding vertical traction roller 18, and a main film cutting guiding vertical roller 19 that cooperate with the main film guiding roller group 12;

[0070] The main film cutting component includes a cutting blade 20 connected to the main film cutting guiding vertical roller 19. On both sides of the cutting blade 20, there are an upper film turning inclined rod 21 and a lower film turning inclined rod 23 perpendicular to the upper film turning inclined rod 21; the main film 1 is cut into the upper film 2 and the lower film 3 by the cutting blade 20; the upper film 2 passes through the upper film turning inclined rod 21 and the upper film turning roller 22 and then converges into the upper and lower deviation adjusting roller group 25, and the lower film 3 passes through the lower film turning inclined rod 23 and the lower film turning roller 24 and then converges into the upper and lower deviation adjusting roller group 25; after the upper film 2 and the lower film 3 are adjusted for deviation by the upper and lower deviation adjusting roller group 25, they pass through the upper and lower tension adjusting roller group 33 and the combined film roller group 34 in sequence, and then cooperate with the combined film first servo traction roller group 35;

[0071] The upper and lower deviation adjusting roller group 25 is a pair of parallel roller groups, including an upper deviation adjusting roller 26 and a lower deviation adjusting roller 27. The upper deviation adjusting roller 26 and the lower deviation adjusting roller 27 move synchronously. After the upper film 2 discharges from the upper film turning roller 22, it cooperates with the upper deviation adjusting roller 26; the lower film 3 discharges from the lower film turning roller 24 and then cooperates with the lower deviation adjusting roller 27; there is a certain gap 30 between the upper deviation adjusting roller 26 and the lower deviation adjusting roller 27.

[0072] The upper and lower tension adjusting roller group 33 includes an upper film 2 tension adjusting roller group and a lower film 3 tension adjusting roller group. The upper film 2 tension adjusting roller group includes two upper film transition rollers 36 and an upper film swing arm roller 37 between the two upper film transition rollers 36. The lower film 3 tension adjusting roller group includes two lower film transition rollers 38 and a lower film swing arm roller 39 between the two lower film transition rollers 38. The upper film swing arm roller 37 and the lower film swing arm roller 39 are preferably connected to one swing arm.

[0073] The film combining roller group 34 is a pair of rollers arranged in sequence along the pipeline direction. The upper film combining roller 40 cooperates with the upper film 2, and the lower film combining roller 41 cooperates with the lower film 3. The upper film combining roller 40 is slightly lower than the lower film combining roller 41 in the horizontal height. Under the action of the film combining roller group 34, the upper film 2 and the lower film 3 are combined into one film 4.

[0074] The first servo traction roller group 35 for film combining is a pair of rollers, which provides the conveying power for the combined film 4.

[0075] During use, after the main film 1 (preferably made of nylon composite PE material) is output from the main film reel 11, it sequentially passes through the main film guiding roller group 12, the main film constant tension swing arm roller group 13, the main film transition roller 14, and cooperates with the main film turning diagonal rod 15 (the main film turning diagonal rod 15 here is a long diagonal rod, and its length is greater than the width of the main film 1), and then cooperates with the main film vertical deviation correcting roller 16 (a main film edge adjusting sensor 17 is arranged outside the main film vertical deviation correcting roller 16 to detect the outer edge of the main film 1. When the outer edge of the main film 1 deviates from the predetermined position, the main film vertical deviation correcting roller 16 moves up and down to adjust the deviation); then it cooperates with the main film unwinding vertical traction roller 18 (providing transmission power), and then cooperates with the main film slitting guiding vertical roller 19;

[0076] After the main film 1 is output from the main film slitting guiding vertical roller 19, it cooperates with the slitting blade 20. The slitting blade 20 is arranged at the center line position of the main film 1 along the pipeline direction. After passing through the slitting blade 20, the main film 1 is cut into an upper film 2 and a lower film 3; the upper film 2 passes through the upper film turning diagonal rod 21 and the upper film turning roller 22 and then merges into the upper and lower deviation adjusting roller group 25, and the lower film 3 passes through the lower film turning diagonal rod 23 and the lower film turning roller 24 and then merges into the upper and lower deviation adjusting roller group 25;

[0077] During the transmission, the upper film 2 and the lower film 3 will form two types of misalignments. The first is the misalignment along the material conveying direction, simply referred to as the front-back misalignment; the second is the misalignment perpendicular to the material conveying direction, simply referred to as the lateral misalignment.

[0078] If there is a front-back misalignment between the upper film 2 and the lower film 3, it needs to be achieved by changing the vertical position of the upper and lower deviation adjustment roller group 25. Since the upper film 2 and the lower film 3 are adjusted simultaneously, the upper deviation adjustment roller 26 and the lower deviation adjustment roller 27 move up and down synchronously. Compared with the movement of a single roller, the adjustment efficiency doubles.

[0079] For example: if the pattern of the upper film 2 is advanced (assuming the lower film 3 also has a pattern and the predetermined position coincides with the pattern of the upper film 2), then it is necessary to drive the upper and lower deviation adjustment roller group 25 to move downward. While the upper film 2 is pressed, the lower film 3 is relaxed. While the pattern of the upper film 2 retreats, the pattern of the lower film 3 moves forward. Such a design can accelerate the adjustment speed. Conversely, if the pattern of the lower film 3 is advanced, then it is necessary to drive the upper and lower deviation adjustment roller group 25 to move upward.

[0080] If there is a lateral misalignment between the upper film 2 and the lower film 3 (here the lateral misalignment refers to the relative misalignment between the upper film 2 and the lower film 3 in the horizontal direction), it is achieved by adjusting the rotation of the upper and lower deviation adjustment roller group 25. In this state, the lateral adjustment movable end 28 rotates around the lateral adjustment reference end 29 by a small angle, and the rotation angle is within ±10°. Since the upper and lower deviation adjustment roller group 25 has a certain length, the displacement of the lateral adjustment movable end 28 is amplified enough to complete the lateral deviation correction. The tightness of the upper film 2 and the lower film 3 in the horizontal direction changes, thereby driving the upper film 2 and the lower film 3 to slide horizontally.

[0081] For example, if the pattern of the upper film 2 is biased towards the lateral adjustment movable end 28 relative to the lower film 3 (assuming the lower film 3 also has a pattern and the predetermined position coincides with the pattern of the upper film 2), then drive the lateral adjustment movable end 28 to be lowered (relative to the lateral adjustment reference end 29). Then the pressure between the position of the upper film 2 close to the lateral adjustment movable end 28 and the upper deviation adjustment roller 26 becomes larger, while the pressure between the position of the upper film 2 close to the lateral adjustment reference end 29 and the upper deviation adjustment roller 26 becomes smaller. The upper film 2 as a whole moves towards the lateral adjustment reference end 29; at the same time, the pressure between the position of the lower film material close to the lateral adjustment movable end 28 and the lower deviation adjustment roller 27 becomes smaller, while the pressure between the position of the lower film material close to the lateral adjustment reference end 29 and the lower deviation adjustment roller 27 becomes larger. The lower film material as a whole moves towards the lateral adjustment movable end 28; since the upper film 2 and the lower film 3 are adjusted in the horizontal direction in the opposite direction at the same time, compared with the movement of a single roller, the adjustment efficiency doubles. Such a design can accelerate the adjustment speed. Conversely, if the pattern of the upper film 2 is biased towards the lateral adjustment reference end 29 relative to the pattern of the lower film 3, then it is necessary to drive the lateral adjustment movable end 28 to be raised for adjustment.

[0082] After the upper film 2 and the lower film 3 are output from the upper and lower offset roller groups 25, the upper film 2 passes through the upper film transition roller 36, the upper film swing arm roller 37, and the upper film transition roller 36 and then cooperates with the upper film combining roller 40. The lower film 3 passes through the lower film transition roller 38, the lower film swing arm roller 39, and the lower film transition roller 38 and then cooperates with the lower film combining roller 41. Since the upper film combining roller 40 is slightly lower than the lower film combining roller 41 in the horizontal height, the upper film 2 and the lower film 3 are combined into one film 4 under the action of the film combining roller group 34 and continue to be output along the flowing water direction under the drive of the first servo traction roller group 35 for film combining.

[0083] The handle hole punching assembly 701 punches the side edge 5 of the handle to form a handle hole 7.

[0084] Embodiment 2, further optimization of Embodiment 1:

[0085] The soft handle film material is formed by folding a soft handle main material film 42 in half. The folded soft handle film material includes a folded opening edge 43 and a folded bottom edge 44. When the soft handle film material is inserted between the upper film 2 and the lower film 3 on the side edge 5 of the handle, the folded opening edge 43 faces outward and the folded bottom edge 44 faces the heat-sealing area 9 at the upper opening of the bag body.

[0086] The soft handle film material is inserted between the upper film 2 and the lower film 3 on the side edge 5 of the handle through a guiding triangular surface 45. The apex angle 46 of the guiding triangular surface is inserted between the upper film 2 and the lower film 3, and the insertion depth is outside the heat-sealing area 9 at the upper opening of the bag body. The soft handle main material film 42 is input from the bottom edge 47 of the guiding triangular surface and output from the apex angle 46 of the guiding triangular surface. After being output from the apex angle 46 of the guiding triangular surface, they gather together. A pair of folding opposing rollers is arranged at the output end of the apex angle. The folding opposing rollers are inserted between the upper film 2 and the lower film 3 to close the upper folded opening edge 49 and the lower folded opening edge 50 to form the soft handle film material. The center line of the soft handle main material film 42 coincides with the end of the apex angle 46 of the guiding triangular surface. The inner end of the folding opposing rollers should extend from the heat-sealing connection area 8 of the soft handle to the heat-sealing area 9 at the upper opening of the bag body.

[0087] A pair of folding and combining roller groups 51 is arranged at the output end of the folding opposing rollers. The folding and combining roller groups 51 are a pair of rollers arranged in sequence along the flowing water direction. The upper folding and combining roller 52 cooperates with the upper film 2, and the lower folding and combining roller 53 cooperates with the lower film 3. The upper folding and combining roller 52 is slightly lower than the lower folding and combining roller 53 in the horizontal height. The upper film 2, the soft handle film material, and the lower film 3 are combined into one film 4 under the action of the folding and combining roller groups 51.

[0088] The insertion of the soft handle film material between the upper film 2 and the lower film 3 on the side of the handle is achieved through a soft handle film material insertion assembly. The soft handle film material insertion assembly includes a soft handle film material roll 54, a soft handle film material guide roller group 55, a soft handle film material constant tension swing arm roller group 56 that cooperates with the soft handle film material guide roller group 55, a soft handle film material transition roller 57, a soft handle film material steering diagonal rod 58, a soft handle film material feeding traction roller group 59, a soft handle film material feeding guide roller group 60, a soft handle film material feeding swing arm roller group 61 that cooperates with the soft handle film material feeding guide roller group 60, a triangular surface connection roller 62, a triangular surface, and a folding pair of rollers.

[0089] During use, the soft handle main material film 42 (preferably made of nylon composite double-sided PE material) is output from the soft handle film material roll 54, and successively passes through the soft handle film material guide roller group 55, the soft handle film material constant tension swing arm roller group 56 (which controls the output tension of the soft handle main material film 42), the soft handle film material transition roller 57, the soft handle film material steering diagonal rod 58, the soft handle film material transition roller 57, the soft handle film material feeding traction roller group 59 (which provides conveying power), the soft handle film material feeding guide roller group 60, the soft handle film material feeding swing arm roller group 61 (which controls the feeding tension of the soft handle main material film 42), the triangular surface connection roller 62, and the triangular surface connection roller 62. Then, the soft handle main material film 42 is input from the bottom edge 47 of the guiding triangular surface and output from the apex 46 of the guiding triangular surface. When the soft handle main material film 42 is output from the apex 46 of the guiding triangular surface (during the output process, the end of the apex 46 of the guiding triangular surface coincides with the center line of the soft handle main material film 42 for sliding fit, and the film materials on both sides of the center line of the soft handle main material film 42 are respectively in sliding fit with the side edges 48 of the guiding triangular surface), under the action of the folding pair of rollers 75, the upper edge 49 of the folding opening and the lower edge 50 of the folding opening are closed to each other, forming the soft handle film material 421;

[0090] Since the apex 46 of the guiding triangular surface and the folding pair of rollers are inserted between the upper film 2 and the lower film 3, the finally formed soft handle film material is between the upper film 2 and the lower film 3. The upper film 2, the soft handle film material, and the lower film 3 are combined into one by the film combining roller group 51. The guiding triangular surface 45 can be on the surface of a guiding triangular plate or on the surface of a guiding triangular block. The inner end of the folding pair of rollers should extend from the soft handle heat-sealing connection area 8 to the upper mouth heat-sealing area 9 of the bag body to ensure that when the soft handle film material passes through the handle hole 7 during transmission, it does not run out between the upper film 2 and the lower film 3 and affect the subsequent heat-sealing.

[0091] Example 3, further optimization of Example 2,

[0092] In step 4), the upper mouth heat-sealing area 9 of the bag body is heat-sealed first, and then the soft handle heat-sealing connection area 8 is heat-sealed; when heat-sealing the upper mouth heat-sealing area 9 of the bag body, it is first heat-sealed by the hot knife assembly 63 and then cooled by the cooling assembly 64;

[0093] The soft handle heat-sealing connection area 8 is first heat-sealed by the hot knife assembly 63 and then cooled by the cooling assembly 64, and the heat-sealing is performed two or more times. Since there are four layers of film materials in the soft handle heat-sealing connection area 8 that need to be heat-sealed together, at least two heat-sealings are required to ensure the heat-sealing effect.

[0094] In step 5), it is first heat-sealed by the hot knife assembly 63 and then cooled by the cooling assembly 64; one end of the side heat-sealing area 10 is connected to the upper mouth heat-sealing area 9 of the bag body, and a transition rounded corner structure 65 is formed at the connection position; the other end of the side heat-sealing area 10 extends to the side of the bag bottom 6, and there is a closing convex structure 66 near the side of the bag bottom 6, and a transition rounded corner structure 65 is formed between the closing convex structure 66 and the main body of the side heat-sealing area 10.

[0095] The heat-sealing components for heat-sealing the side of the bag body include multiple groups of heat-sealing assemblies. Each group of heat-sealing assemblies includes a hot knife 67 and a backing plate 68. The positional relationship between the hot knife 67 and the backing plate 68 is that the hot knife 67 is above and the backing plate 68 is below, or the hot knife 67 is below and the backing plate 68 is above. The above two positional relationships are alternately arranged along the conveying direction of the film combination 4. Preferably, there are four groups of heat-sealing assemblies.

[0096] Cut the waste edges of the film combination 4 before step 5).

[0097] 6) Cut rounded corners on the film combination 4; a rounding punch 69 is provided at the position of the center line 1001 of the side heat-sealing area, and a triangular-like notch 70 is punched on the side, and the edge of the triangular-like notch 70 is an arc edge 71.

[0098] 7) Cut the film combination 4 into bags. When cutting, two cuts are made respectively on the front side and the rear side of the sharp corner position of the triangular-like notch 70 to ensure that there are no burrs on the edge of the finally cut bag body.

[0099] The conveyance of the film combination 4 in steps 4), 5), 6), and 7) is achieved through the cooperation of the driving roller assembly 72 and the color mark sensor 73 (detecting the color mark 32). A floating roller group 74 is also provided in each step. The floating roller group 74 is used to judge the speed difference between the front and rear channels of the conveyance of the film combination 4. If the front channel is too fast, the floating roller group 74 floats up; if the front channel is too slow, the floating roller group 74 sinks down.

[0100] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the invention.

Claims

1. A process for manufacturing bags with soft handles, characterized in that, it includes the following steps: 1). The upper film (2) and the lower film (3) are conveyed along the pipeline direction and combined into a double-layer film during conveyance, defined as the combined film (4). One side edge of the combined film (4) is the handle side edge (5), and the other side edge is the bag bottom side edge (6); 2). Punch holes in the handle side edge (5) to form handle holes (7). The area of the combined film (4) between the handle holes (7) along the pipeline direction is the soft handle heat-sealing connection area (8). Inside the handle holes (7) and the soft handle heat-sealing connection area (8) is provided with a bag body upper mouth heat-sealing area (9); 3). Insert the soft handle film material between the upper film (2) and the lower film (3) of the handle side edge (5) and convey it along the pipeline direction under the clamping of the upper film (2) and the lower film (3). The soft handle film material is exposed at the position of the handle holes (7), and the soft handle film material is clamped by the upper film (2) and the lower film (3) in the soft handle heat-sealing connection area (8); 4). Heat-seal the bag body upper mouth heat-sealing area (9) and the soft handle heat-sealing connection area (8) simultaneously or separately; 5). Heat-seal the side of the bag body. The side heat-sealing area (10) is perpendicular to the pipeline direction; 6). Cut the rounded corners of the combined film (4); 7). Cut the combined film (4) into bags; The insertion of the soft handle film material between the upper film (2) and the lower film (3) of the handle side edge (5) is realized through a guiding triangular surface (45). The apex angle (46) of the guiding triangular surface is inserted between the upper film (2) and the lower film (3), and the insertion depth is outside the bag body upper mouth heat-sealing area (9). The main soft handle film material (42) is input from the bottom edge (47) of the guiding triangular surface and output from the apex angle (46) of the guiding triangular surface. After output from the apex angle (46) of the guiding triangular surface, they gather together. A pair of folding counter-rollers are arranged at the output end of the apex angle. The folding counter-rollers are inserted between the upper film (2) and the lower film (3) to close the upper side (49) and the lower side (50) of the folding opening, forming the soft handle film material. The end of the apex angle (46) of the guiding triangular surface coincides with the center line of the main soft handle film material (42).

2. The process for manufacturing bags with soft handles according to claim 1, characterized in that: In the step 1), the upper film (2) and the lower film (3) are cut from the same main film (1) along the center line. The main film (1) is arranged on the main film material roll (11) and forms the combined film (4) through the main film (1) feeding component and the main film (1) slitting component.

3. The process for manufacturing bags with soft handles according to claim 2, characterized in that: The main film (1) feeding component includes a main film guiding roller group (12) connected to the main film material roll (11), as well as a main film constant tension swing arm roller group (13), a main film transition roller (14), a main film turning inclined rod (15), a main film vertical deviation rectifying roller (16), a main film discharging vertical traction roller (18), and a main film slitting guiding vertical roller (19) cooperating with the main film guiding roller group (12); The slitting component of the main film (1) includes a slitting blade (20) connected to the main film slitting guiding vertical roller (19). Upper film turning inclined rods (21) and lower film turning inclined rods (23) perpendicular to the upper film turning inclined rods (21) are arranged on both sides of the slitting blade (20). The main film (1) is slit into an upper film (2) and a lower film (3) by the slitting blade (20). The upper film (2) converges into the upper and lower deviation adjusting roller group (25) after passing through the upper film turning inclined rod (21) and the upper film turning roller (22), and the lower film (3) converges into the upper and lower deviation adjusting roller group (25) after passing through the lower film turning inclined rod (23) and the lower film turning roller (24). After the deviation adjustment of the upper film (2) and the lower film (3) in the upper and lower deviation adjusting roller group (25), they sequentially pass through the upper and lower tension adjusting roller group (33), the film combining roller group (34), and then cooperate with the first servo traction roller group for film combining (35).

4. The soft handle bag-making process according to claim 3, characterized in that: The soft handle film material is formed by folding a soft handle main material film (42) in half. The folded soft handle film material includes a folded opening edge (43) and a folded bottom edge (44). When the soft handle film material is inserted between the upper film (2) and the lower film (3) on the side of the handle (5), the folded opening edge (43) faces outward, and the folded bottom edge (44) faces the heat-sealing area (9) at the upper opening of the bag body.

5. The soft handle bag-making process according to claim 4, characterized in that: The inner end of the folding pair of rollers should extend from the soft handle heat-sealing connection area (8) to the heat-sealing area (9) at the upper opening of the bag body.

6. The soft handle bag-making process according to claim 5, characterized in that: A pair of film combining rollers for folding (51) is arranged at the discharging end of the folding pair of rollers. The pair of film combining rollers for folding (51) is a pair of rollers arranged in sequence along the production line direction. The upper film combining roller for folding (52) cooperates with the upper film (2), and the lower film combining roller for folding (53) cooperates with the lower film (3). The upper film combining roller for folding (52) is slightly lower in horizontal height than the lower film combining roller for folding (53). The upper film (2), the soft handle film material, and the lower film (3) are combined into one under the action of the pair of film combining rollers for folding (51).

7. The soft handle bag-making process according to claim 6, characterized in that: The insertion of the soft handle film material between the upper film (2) and the lower film (3) on the side of the handle (5) is realized by a soft handle film material insertion component. The soft handle film material insertion component includes a soft handle film material roll (54), a soft handle film material guiding roller group (55), a soft handle film material constant tension swing arm roller group (56) cooperating with the soft handle film material guiding roller group (55), a soft handle film material transition roller (57), a soft handle film material turning inclined rod (58), a soft handle film material discharging traction roller group (59), a soft handle film material discharging guiding roller group (60), a soft handle film material discharging swing arm roller group (61) cooperating with the soft handle film material discharging guiding roller group (60), a triangular surface connecting roller (62), a triangular surface, and a folding pair of rollers.

8. The soft handle bag-making process according to claim 1, characterized in that: In step 4), first heat-seal the upper heat-sealing area (9) of the bag body, and then heat-seal the heat-ironing connection area (8) of the soft handle; when heat-sealing the upper heat-sealing area (9) of the bag body, first heat-iron it through the hot knife assembly (63), and then cool it through the cooling assembly (64); The heat-ironing connection area (8) of the soft handle is first heat-ironed through the hot knife assembly (63), and then cooled through the cooling assembly (64), and the heat-ironing is performed two or more times.

9. The soft handle bag-making process according to claim 8, characterized in that: In step 5), first heat-iron it through the hot knife assembly (63), and then cool it through the cooling assembly (64); one end of the side heat-sealing area (10) is connected to the upper heat-sealing area (9) of the bag body, and a transition fillet structure (65) is formed at the connection position; the other end of the side heat-sealing area (10) extends to the bottom side (6) of the bag, and there is a closing convex structure (66) near the bottom side (6) of the bag. A transition fillet structure (65) is formed between the closing convex structure (66) and the main body of the side heat-sealing area (10); The heat-ironing components for heat-sealing the sides of the bag body include multiple groups of heat-ironing assemblies. Each group of heat-ironing assemblies includes a hot knife (67) and a backing plate (68). The positional relationship between the hot knife (67) and the backing plate (68) is that the hot knife (67) is above and the backing plate (68) is below, or the hot knife (67) is below and the backing plate (68) is above. The above two positional relationships are alternately arranged along the transmission direction of the film (4); there are four groups of multiple heat-ironing assemblies; Cut the waste edges of the film (4) before step 5).

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