Collapsible packaging container structure and apparatus, process

Abstract

The present application relates to a folding packaging container structure and a bottom sealing device and process, which comprises a folding packaging body, a cavity for containing a load is formed after folding; an upper opening is located above the folding packaging body, and a bottle cap is provided at the upper opening after the load in the cavity; a bottom opposite to the upper opening; a fold A and a fold B which are abutted and folded; the front surface part of the fold A and the front surface part of the fold B serve as the corresponding front surface of the folding packaging body and are located between the bottom and the upper opening; at least a first side surface and a second side surface located between the bottom and the upper opening are provided between the front surfaces; the present application is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] This invention relates to the structure and sealing equipment and process of folding packaging containers for beverages, preferably related to liquid beverages. Background Technology

[0002] Foldable packaging containers, such as composite paper (pulp, aluminum or tin foil) packaging containers, are widely used for packaging liquids (water, milk, juice, medicine, etc.). They consist of at least two layers and are generally made of multiple layers. The inner wall layer has a leak-proof material (such as food-grade plastic) and can be heat-melted and bonded together when heated, while the middle or outer composite paper material has a good shape retention effect after folding.

[0003] However, existing technologies require sealing one end (usually the bottom, or the same if the side is sealed) after filling. The existing side seals are glued together after being folded laterally. Then, they are aligned and glued together on the other side (e.g., bottom or top seal), with folded ears and glued. Because the bottom and side aligning parts (also called stitching lines, sealing lines, or sealing lines) are on a vertical plane, a subsequent 90° lateral flip causes stress concentration and folding, leading to container deformation, incomplete sealing, and a high scrap rate. Furthermore, the presence of a middle side seal makes the container unstable, requiring bottom shaping to create a concave center, complicating the process.

[0004] To address the aforementioned technical issues, some manufacturers currently use PP / PE strips or adhesive strips to bond the inner and outer sides together, which in turn affects the hygiene and health of the beverage. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a folding packaging container structure and bottom sealing equipment and process.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A foldable packaging container structure includes a foldable packaging body that, when folded, forms a cavity for accommodating a cargo.

[0008] The upper opening is located above the folded packaging body, and has a cap at least after the cavity is filled;

[0009] The bottom is opposite to the opening at the top.

[0010] Fold A and fold B are joined together; the front surface of fold A and the front surface of fold B serve as the corresponding front surfaces of the folded package and are located between the bottom and the top opening; at least a first side and a second side are provided between the front surfaces and located between the bottom and the top opening.

[0011] The cavity is located at the bottom, the upper opening, the folded part A, the folded part B, the first side and the second side.

[0012] As a further improvement to the above technical solution:

[0013] Include at least one of the following options:

[0014] a) The first side seal and the second side seal serve as side sealing parts after the folded part A and the folded part B are joined together. The bonding direction of the first side seal and the outer side of the first side is opposite to the bonding direction of the second side seal and the outer side of the second side.

[0015] b) When the first side seal is bonded to the outer wall of the folded part A, the second side seal is bonded to the outer wall of the folded part B.

[0016] c) Bottom fold A, whose root is connected to the lower part of the front surface of the folded part A and has a crease line CD at the connection; Bottom fold B, whose root is connected to the lower part of the front surface of the folded part B and has a first crease line parallel to the crease line CD at the connection.

[0017] d) Bottom sealing portion, serving as the bottom sealing portion after folded portion A and folded portion B are joined; the bottom sealing portion is not coplanar with the first side sealing portion and / or the bottom sealing portion is not coplanar with the second side sealing portion;

[0018] e) On the first side, there is a shaped recess A between the inner wall of the folded portion A and the folded portion B; on the second side, there is a shaped recess B between the inner wall of the folded portion A and the folded portion B that intersects with the shaped recess A.

[0019] f) The mating surface of the bottom seal is perpendicular to the mating surface of the first side seal and / or the mating surface of the second side seal;

[0020] g) The upper opening has a cap at least after the cavity is filled;

[0021] h), the sealing treatment of the first side seal and the sealing of the second side seal are carried out simultaneously or separately.

[0022] Crease line CD and the first crease line form the bottom edge line;

[0023] The first upper fold ear is located on the upper part of the first side, and the second top fold ear is located on the upper part of the second side. In the unfolded state of the folded package, the crease line CD is perpendicular or oblique to the crease line VW at the root of the first upper fold ear or the crease line XY at the root of the second top fold ear, and the first crease line is perpendicular or oblique to the crease line VW at the root of the first upper fold ear or the crease line XY at the root of the second top fold ear.

[0024] Fold A and / or fold B include the front surface portion;

[0025] The first side surface portion, one side is connected to the front surface portion by a crease line WC and folded to the first side surface portion;

[0026] The second side surface is connected to the other side of the front surface by a crease line YD and folded to the second side surface.

[0027] The first side sealing part is connected to one side of the first side surface part;

[0028] The second side sealing part is connected to one side of the second side surface part;

[0029] The first side seal of fold A is sealed and bonded to the first side seal of fold B to form a first side seal, and the second side seal of fold A is sealed and bonded to the second side seal of fold B to form a second side seal;

[0030] The first bottom folded ear folding surface is connected to one side of the bottom folded ear A through the crease line CG and then folded to the bottom.

[0031] The first bottom surface is connected to the first side surface through crease line BC and to the first bottom folding surface through crease line CI. After folding, the first bottom folding surface is located between the bottom folding surface A and the first bottom surface.

[0032] The second bottom folded ear folding surface is connected to the other side of the bottom folded ear A through the crease line DG and then folded to the bottom;

[0033] The second bottom surface is connected to the second side surface through crease line DE and to the second bottom folding surface through crease line DK. After folding, the second bottom folding surface is located between the bottom folding surface A and the second bottom surface.

[0034] The first directional side seal I is connected to the first side seal part through the crease line AB and to the first bottom surface through the crease line BH. After being folded, the first directional side seal I of the folded part A and the first directional side seal I of the folded part B are bonded together to form part of the bottom seal part.

[0035] The second directional side seal I is connected to the second side seal part through the crease line EF and to the second bottom surface through the crease line EL. After being folded, the second directional side seal I of the folded part A and the second directional side seal I of the folded part B are bonded together to form part of the bottom seal part.

[0036] The first re-side seal II is connected to the first reversing side seal I through the crease line GH. After folding, the first re-side seal II of the folded part A and the first re-side seal II of the folded part B are bonded together to form the first connecting part between the bottom seal and the first side seal.

[0037] The second re-side seal II, through the crease line LM and the second reversible side seal I, after being folded, the second re-side seal II of the folded part A and the second re-side seal II of the folded part B are bonded together to form the second connecting part between the bottom seal part and the second side seal part;

[0038] The shaped concave portion A corresponds to the first connecting portion, and the shaped concave portion B corresponds to the second connecting portion;

[0039] The first bottom sealing part I is connected to the first bottom folding ear folding surface through the fold line IG, and the second bottom sealing part I is connected to the second bottom folding ear folding surface through the fold line KG. The first bottom sealing part I and the second bottom sealing part I of the folded part A and the folded part B are connected and sealed together through the fold line GR.

[0040] The first bottom seal II is connected to the first bottom seal I via crease line IQ, to the first bottom surface via crease line HI, and to the first re-side seal II via crease line HP;

[0041] The second bottom seal II is connected to the second bottom seal I via crease line KS, to the second bottom surface via crease line KL, and to the second re-side seal II via crease line LT; the first bottom seal II of each of the folded parts A and B are joined and sealed together with the second bottom seal II.

[0042] A bottom sealing device for sealing the folding packaging container structure as described in claim 1.

[0043] Bottom sealing; including at least one of the following workstations:

[0044] The side cover folding station uses a mold to fold and / or bond the first side cover and the outer side of the first side face in opposite directions to the bonding direction of the second side cover and the outer side of the second side face, respectively.

[0045] The filling station uses a filling machine to fill the package from the bottom of the folded packaging, where it is to be sealed.

[0046] The bottom cover folding station folds the bottom to align the bottom cover parts.

[0047] The bottom seal sealing station seals the bottom seal section using a bottom seal sealing adhesive joint.

[0048] The bottom seal side folding station rotates the sealed bottom seal 90° to the side.

[0049] The bottom folding lug folding station folds bottom folding lug A and bottom folding lug B together;

[0050] At the bottom bonding station, the bottom flap A is bonded to the bottom.

[0051] The bottom seal side bonding station bonds the bottom seal to the bottom.

[0052] Workstation connection devices are installed between workstations.

[0053] As a further improvement to the above technical solution:

[0054] At the side cover folding station, a side folding bottom fixture is provided, and a side folding center hole corresponding to the bottle cap is provided on the side folding bottom fixture; a side folding outer mold for mating movement is provided on the side folding bottom fixture, and a side folding drive rod is connected to the side folding outer mold. The side folding outer mold has a U-shaped structure, with the middle side folding concave surface corresponding to the front surface. One end of the side folding outer mold is provided with a side folding process end face, and the other end is provided with a side folding L-step.

[0055] The side folding process end face corresponds to the side edge of the second side seal or the first side seal, and the side folding L-step corresponds to the outer surface of the first side seal or the second side seal;

[0056] An inner forming mandrel mold is inserted into the bottom sealing opening of the folded packaging body, and a side folding top head for upward lifting is provided below the side folding center hole;

[0057] The first side seal is bonded to the outer side of the first side in the opposite direction to the bonding direction of the second side seal to the outer side of the second side.

[0058] A bottom seal folding lifting guide is provided above the bottom cover folding station. A bottom seal folding guide spring piece in the shape of an 8 is connected to the lower end of the bottom seal folding lifting guide to prevent the folded part A and the folded part B from folding inward. A bottom seal folding end face side step is provided on the outside of the folded part A and the folded part B to support the folded part A and the folded part B. A bottom seal side swinging mold block is provided on the outside of the first side and the second side to change the first bottom surface and the second bottom surface from vertical to horizontal.

[0059] At the bottom seal sealing station, the bottom seal is sealed using a bottom seal sealing adhesive joint;

[0060] The bottom seal side folding station rotates the sealed bottom seal 90° to the side.

[0061] The bottom folding lug folding station folds bottom folding lug A and bottom folding lug B together;

[0062] At the bottom bonding station, the bottom flap A is bonded to the bottom.

[0063] The bottom seal side bonding station is used to bond the bottom seal to the bottom.

[0064] The workstation connection device includes a linear reciprocating die or a circulating conveyor belt; a workstation connection process port is provided on the linear reciprocating die or the circulating conveyor belt; an external shaping mold adapted to the shape of the folded packaging body is provided on the workstation connection process port; and a workstation top push rod for top cap is provided below the workstation connection process port.

[0065] The station's external forming mold has a station process recess that aligns with the second top fold or the first upper fold;

[0066] At the bottom sealing station, a pair of swinging bottom sealing adhesive side pressure mold blocks are provided on the outer sides of the first and second sides, which press down on the folded first and second bottom surfaces respectively.

[0067] A bottom sealing shaping end face side step is provided on the outside of the folded part A and the folded part B for supporting the bottom fold A and the bottom fold B; a bottom sealing folding pressing mold is provided above the bottom sealing shaping end face side step for pressing the bottom fold A and the bottom fold B on the bottom sealing shaping end face side step after descending.

[0068] A bottom seal sealing and bonding lifting head is provided on the bottom seal sealing and bonding joint;

[0069] The bottom seal side folding station is equipped with a bottom seal side pressing mold that can be swung, rolled or lifted, which flips the sealed bottom seal part 90° to the side.

[0070] At the bottom folding station, a bottom sealing folding end face side top mold is fixed, rolled, extended, or oscillated for pressure contact with the outer side of the front surface. A bottom sealing folding mold and / or bottom sealing folding mold is oscillated above the bottom sealing folding end face side top mold to fold the corresponding bottom folding A and bottom folding B.

[0071] The bottom bonding station is equipped with a bottom sealing folding joint for bonding bottom folding ears A and B to the bottom.

[0072] A bottom sealing process for the folding packaging container structure described in claim 1.

[0073] Bottom sealing; this process includes the following steps;

[0074] Step 1: Seal both sides of the edge simultaneously or sequentially, and heat-process the first side seal and the second side seal separately to bond and seal them.

[0075] Step 3: Fold the bottom edge in half. Use a mold or manually to fold along the creases at the bottom, ensuring the bottom sealing parts are aligned. The folding surface of the bottom sealing parts is perpendicular to the folding surface of the first side sealing parts. A detailed description of each folded surface is provided.

[0076] Step 4: Bottom sealing edge sealing. The bottom sealing part is heat-treated and bonded for sealing.

[0077] As a further improvement to the above technical solution:

[0078] In step one, when the first side seal is sealed, the first re-side seal II and the first re-side seal II of the folded part B are bonded together to form a first connecting part with the first side seal;

[0079] When the second side seal is sealed, the second re-side seal II of the folded part A and the second re-side seal II of the folded part B are bonded together to form a second connecting part with the second side seal;

[0080] Step two, fold the side seams.

[0081] When the side sealing edge is folded, the first side sealing part is folded in the same direction as or opposite to the bonding direction of the second side sealing part and the outer side of the second side using a mold or manually;

[0082] Before or after step one, there are the following steps: the first side and the second side are folded together. When the first side and the second side are folded together, one side of the surface portion of the first side is connected to one side of the front surface portion through the crease line WC and folded together to the first side; one side of the surface portion of the second side is connected to the other side of the front surface portion through the crease line YD and folded together to the second side.

[0083] Step 5: Fold the bottom edge sideways, using a mold or manually to fold the bottom edge sideways;

[0084] After step five, firstly, the first upper folding ear and the second top folding ear are folded over and brought into contact with the bottom sealing part by means of a mold or manual operation; then, the bottom folding ear is bonded by means of a welding machine, bonding machine or hot air blower to bond the first upper folding ear and the second top folding ear to the bottom sealing part respectively.

[0085] After step two, side bonding is performed. The first side seal is bonded to the outer side of the first side in the opposite direction to the bonding direction of the second side seal to the outer side of the second side using a mold.

[0086] After step two, the filling machine fills the package from the bottom of the folded packaging, through the opening to be sealed.

[0087] After step two or after step one, and before step three, the bottom folding lugs A and B are pre-formed and folded using a mold or manually, so that the bottom fold lines have crease memory.

[0088] In step three, the folding of the bottom edge includes...

[0089] Fold the first reversible side seal I, the first bottom surface, the first bottom folded ear folding surface, the second bottom folded ear folding surface, the second bottom surface, and the second reversible side seal I along the crease lines AB, BC, CG, DG, DE, and EF respectively;

[0090] Fold the first re-side seal II, the first bottom seal II, the first bottom seal I, the second bottom seal I, the second bottom seal II, and the second re-side seal II along the fold lines GH, HI, IG, GK, KL, and LM respectively, so that the first bottom seal II and the second bottom seal II are attached together, and the first bottom seal I and the second bottom seal I are attached together;

[0091] When the first re-side seal II and the second re-side seal II are folded together on the same side, the shaped concave A on both sides fit together. When the first re-side seal II and the second re-side seal II are folded together on opposite sides, the arch formed by the folding of the first re-side seal II fits together with the shaped concave A formed by the folding of the second re-side seal II, and the arch formed by the folding of the second re-side seal II fits together with the shaped concave A formed by the folding of the first re-side seal II, forming the bottom sealing edge.

[0092] In step four, the bottom edge is sealed by heat-processing and bonding.

[0093] After step five, fold the bottom fold ear A along the crease line DC.

[0094] This invention is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0095] Figure 1 This is a schematic diagram of the structure of prior art 1 of the present invention.

[0096] Figure 2 This is a schematic diagram of the structure of prior art 2 of the present invention.

[0097] Figure 3 This is a schematic diagram of the first improved structure of the present invention.

[0098] Figure 4 This is a schematic diagram of the unfolded structure of the composite paper of the present invention.

[0099] Figure 5 This is a schematic diagram of the composite paper structure of the present invention.

[0100] Figure 6 This is a schematic diagram of the composite paper structure before folding.

[0101] Figure 7 This is a block diagram of Embodiment 1 of the composite paper process route of the present invention.

[0102] Figure 8 This is a block diagram of Embodiment 2 of the composite paper process route of the present invention.

[0103] Figure 9 This is a block diagram of Embodiment 3 of the composite paper process route of the present invention.

[0104] Figure 10 This is a block diagram of Example 4 of the composite paper process route of the present invention.

[0105] Figure 11 This is a block diagram of Embodiment 5 of the composite paper process route of the present invention.

[0106] Figure 12 This is a schematic diagram of the composite paper process route of the present invention.

[0107] Figure 13 This is a schematic diagram of Embodiment 1 of the side sealing part of the present invention.

[0108] Figure 14 This is a schematic diagram of the structure of Embodiment 2 of the side sealing part of the present invention.

[0109] Figure 15 This is a schematic diagram of the structure of Embodiment 1 of the bottom seal of the present invention.

[0110] Figure 16 This is a schematic diagram of the structure of Embodiment 2 of the bottom seal of the present invention.

[0111] The components are: 1. Folded packaging body; 2. Fold A; 3. Fold B; 4. Bottle cap; 5. Bottom; 6. First side seal; 7. Second side seal; 8. Bottom fold A; 9. Bottom fold B; 10. Bottom seal; 12. First upper fold; 11. Second top fold; 13. Front surface; 14. First side surface; 15. Second side surface; 16. First side seal; 17. Second side seal; 18. First bottom fold fold surface; 19. Second bottom fold fold surface; 20. First bottom surface; 21. ... 22. First directional side seal I; 23. Second directional side seal I; 24. First reversible side seal II; 25. Second reversible side seal II; 26. First bottom seal I; 27. Second bottom seal I; 28. First bottom seal II; 29. ​​Second bottom seal II; 30. Adhesive strip; 31. Side cover folding station; 32. Filling station; 33. Bottom cover folding station; 34. Bottom seal sealing station; 35. Bottom seal side folding station; 36. Bottom folding ear folding station; 37. Bottom adhesive station; 38. Bottom seal side folding station; 39. Bottom sealing opening; 40. Side folding bottom jig; 41. Side folding center hole; 42. Side folding outer mold; 43. Side folding drive rod; 44. Side folding concave surface; 45. Side folding L-step; 46. Side folding process end face; 47. Side folding upper ejector; 48. Inner forming mandrel mold; 49. Filling machine; 50. Station connecting device; 51. Station upper push rod; 52. Bottom seal folding lifting guide; 53. Bottom seal folding guide spring; 54. Bottom seal folding end 55. Side step; 56. Bottom seal side swing pressure mold block; 57. Bottom seal bonding side pressure mold block; 58. Bottom seal shaping end face side step; 59. Bottom seal folding downward pressure mold; 60. Bottom seal sealing bonding joint; 61. Bottom seal side pressure mold; 62. Bottom seal folding ear end face side top mold; 63. Bottom seal folding ear mold; 64. Bottom seal folding ear bonding joint; 65. Station external shaping mold; 66. Station connection process port; 67. Station process inner concave; 68. Forming inner concave A; 69. Forming inner concave B. Detailed Implementation

[0112] like Figure 1-16 As shown, the foldable packaging container structure of this embodiment includes a foldable packaging body 1, which, when folded, forms a cavity for accommodating a container; the container is generally a liquid, but packaging granular materials or solids is also within the scope of this invention.

[0113] The upper opening, such as Figure 4 , 5The container is located on top of the folded packaging body 1 and has a cap 4 at the top opening at least after the cavity is filled with a substance (e.g., filled with liquid or stored solid). It is generally preferable to install the cap before filling with liquid to avoid secondary contamination. For containers with a top opening, such as paper cups, the cap 4 may be unnecessary or optional. Changing the top opening to a side or bottom opening is also within the scope of this invention. If the top opening is sealed using other methods (e.g., film, gluing, or folding), but the top opening is still exposed after cutting the top of the cavity, this is also within the scope of protection. As part of the scope of this invention, if a side or front (back) opening is used as a side opening to avoid a top opening, this is also equivalent to this invention. Swapping the bottom and top of the invention, or changing the placement method, is also within the scope of protection. Furthermore, changing any surface to a planar or three-dimensional shape is also within the scope of protection.

[0114] Figure 5 The second folded lug 11 indicates the second side surface, such as Figure 6 As shown.

[0115] The bottom part (5) is opposite to the opening at the top; it serves as the bottom and supports the container.

[0116] Folded portion A2 and folded portion B3 are joined together; the front surface portion 13 of folded portion A2 and the front surface portion 13 of folded portion B3 serve as the corresponding front (or one front and one back) of the folded packaging body 1 and are located between the bottom 5 and the upper opening; at least a first side and a second side are provided between the front and the bottom 5 and the upper opening.

[0117] The cavity is located in the bottom 5, the upper opening, the folded part A2, the folded part B3, the first side and the second side; that is, it is preferably a quadrangular prism structure, but not limited to a quadrangular prism structure, such as a multi-faceted prism or other container structure with at least a top and bottom and four sides.

[0118] The fold line and crease line of this invention have the same meaning. They can be continuous lines or broken lines. The fold line can be an extension of the corresponding surface virtual line. It can be visible to the naked eye or not. The line can be a multi-branched line segment with a common endpoint, or it can be a reasonably deformed curve, etc.

[0119] This invention includes at least one of the following solutions or a reasonable combination thereof;

[0120] a) such as Figure 4 , 5 The first side sealing portion 6 and the second side sealing portion 7 serve as the side sealing portions after the folded portions A2 and B3 are joined together. The bonding direction of the first side sealing portion 6 to the outer side of the first side is opposite to the bonding direction of the second side sealing portion 7 to the outer side of the second side. This is an important inventive point of the present invention, which solves the problem of traditional methods such as... Figure 1Folding method and the invention before improvement Figure 2 Existing technical problems, such as inadequate bottom sealing, poor welding at intersections, and uneven stress distribution, make the container shape prone to deformation. Figure 1 All of these are on a single plane, which can easily lead to leakage. Furthermore, placement and stacking are inconvenient and unstable. Eliminating the adhesive strip 30 makes it safer and more hygienic, allowing for direct sealing, reducing the container's external dimensions, and making the container more regular in shape. However, adding the adhesive strip 30 to circumvent this invention falls within the scope of protection of this invention.

[0121] When the first re-side seal II24 and the second re-side seal II25 are folded together on the same side, the shaped concave A68 on both sides fit together. When the first re-side seal II24 and the second re-side seal II25 are folded together on opposite sides, the arch formed by the folding of the first re-side seal II24 fits together with the shaped concave A68 formed by the folding of the second re-side seal II25, and the arch formed by the folding of the second re-side seal II25 fits together with the shaped concave A68 formed by the folding of the first re-side seal II24.

[0122] b) When the first side seal 6 is bonded to the outer wall of the folded part A2, the second side seal 7 is bonded to the outer wall of the folded part B3; this is an explanation of scheme a).

[0123] c) Bottom fold A8, the base of which is connected to the lower part of the front surface portion 13 of the folded portion A2 and has a crease line CD at the connection; bottom fold B9, the base of which is connected to the lower part of the front surface portion 13 of the folded portion B3 and has a first crease line parallel to the crease line CD at the connection; thereby realizing the folding of the bottom.

[0124] d) The bottom sealing portion 10 serves as the bottom sealing portion after the folded portion A2 and the folded portion B3 are joined together; the bottom sealing portion 10 is not coplanar with the first side sealing portion 6 and / or the bottom sealing portion 10 is not coplanar with the second side sealing portion 7; as another key inventive point of this invention, it solves the problem of... Figure 1 The design addresses the issue of interference between the bottom folded lugs, resulting in a more rational stress distribution and more stable forming.

[0125] e) On the first side, there is a shaped recess A68 between the inner wall of the folded portion A2 and the folded portion B3; on the second side, there is a shaped recess B69 between the inner wall of the folded portion A2 and the folded portion B3 that intersects with the shaped recess A68. As another key inventive point of this invention, when the bottom is sealed, they are mutually compatible, thus achieving better sealing performance, good processability, uniform thickness, and regular shape.

[0126] f) In the direction of projection from the first side to the second side, the mating surface of the bottom sealing part 10 is perpendicular to the mating surface of the first side sealing part 6 and / or the mating surface of the second side sealing part 7. In addition, as shown in the figure, the two are not collinear.

[0127] Crease line CD and the first crease line are the edge lines of bottom 5;

[0128] The bottom folding lug A8 and the first upper folding lug 12 are isosceles triangles or isosceles trapezoids;

[0129] The first upper folding ear 12 is located on the upper part of the first side, and the second top folding ear 11 is located on the upper part of the second side. In the unfolded state of the folded packaging body 1, the crease lines CD are perpendicular or oblique (preferably perpendicular) to the crease lines VW and XY at the roots of the first upper folding ear 12 and the second top folding ear 11, respectively. The first crease line is also perpendicular or oblique to the crease lines VW and XY at the roots of the first upper folding ear 12 and the second top folding ear 11, respectively. As another key inventive point of this invention, this allows for mutual adaptation when the bottom is sealed, resulting in better sealing, better processability, uniform thickness, and a regular shape.

[0130] like Figure 4 As an example, the folded portion A2 and / or the folded portion B3 includes a front surface portion 13;

[0131] The first side surface portion 14 is connected to the side surface portion 13 by a crease line WC and folded to the first side surface portion;

[0132] The second side surface 15 is connected to the other side of the front surface 13 by a crease line YD and is folded to the second side surface.

[0133] The first side sealing portion 16 is connected to one side of the first side surface portion 14;

[0134] The second side sealing part 17 is connected to one side of the second side surface part 15 on one side.

[0135] The first side sealing portion 16 of the folded portion A2 and the first side sealing portion 16 of the folded portion B3 are sealed and bonded to form the first side sealing portion 6, and the second side sealing portion 17 of the folded portion A2 and the second side sealing portion 17 of the folded portion B3 are sealed and bonded to form the second side sealing portion 7.

[0136] The first bottom folded ear 18 is connected to one side of the bottom folded ear A8 via the crease line CG and then folded to the bottom 5.

[0137] The first bottom surface 20 is connected to the first side surface 14 through the crease line BC and to the first bottom folding surface 18 through the crease line CI. After folding, it reaches the bottom 5. After folding, the first bottom folding surface 18 is located between the bottom folding surface A8 and the first bottom surface 20.

[0138] The second bottom folded ear folding surface 19 is connected to the other side of the bottom folded ear A8 through the fold line DG and folded to the bottom 5;

[0139] The second bottom surface 21 is connected to the second side surface 15 through the crease line DE and to the second bottom folding surface 19 through the crease line DK. After folding, it reaches the bottom 5. After folding, the second bottom folding surface 19 is located between the bottom folding surface A8 and the second bottom surface 21.

[0140] The first directional side seal I22 is connected to the first side seal 16 through the crease line AB and to the first bottom surface 20 through the crease line BH. After being folded, it reaches the bottom 5. After being folded, the first directional side seal I22 of the folded part A2 and the first directional side seal I22 of the folded part B3 are bonded together to form part of the bottom seal 10.

[0141] The second directional side seal I23 is connected to the second side seal 17 through the crease line EF and to the second bottom surface 21 through the crease line EL. After being folded, it reaches the bottom 5. After being folded, the second directional side seal I23 of the folded part A2 and the second directional side seal I23 of the folded part B3 are bonded together to form a part of the bottom seal 10.

[0142] The first re-side seal II24 is folded together with the first reversing side seal I22 through the crease line GH. After folding, the first re-side seal II24 of the folded part A2 and the first re-side seal II24 of the folded part B3 are bonded together to the bottom seal part 10 and form a first connecting part with the first side seal part 6.

[0143] The second re-side seal II25, through the crease line LM and the second reversible side seal I23, after being folded together, the second re-side seal II25 of the folded part A2 and the second re-side seal II25 of the folded part B3 are bonded together to the bottom seal 10 and form a second connecting part with the second side seal 7;

[0144] The shaped concave part A68 corresponds to the first connecting part, and the shaped concave part B69 corresponds to the second connecting part; thus achieving a seal with good adhesion, good sealing performance, not easy deformation, and reasonable structure.

[0145] As an example, the first bottom sealing part I26 is connected to the first bottom folding ear folding surface 18 through the fold line IG, and the second bottom sealing part I27 is connected to the second bottom folding ear folding surface 19 through the fold line KG. The first bottom sealing part I26 and the second bottom sealing part I27 of the folded part A2 and the folded part B3 are connected and sealed together through the fold line GR.

[0146] The first bottom seal II28 is connected to the first bottom seal I26 via crease line IQ, and to the first bottom surface 20 via crease line HI, and to the first re-side seal II24 via crease line HP;

[0147] The second bottom seal II29 is connected to the second bottom seal I27 via crease line KS, to the second bottom surface 21 via crease line KL, and to the second re-side seal II25 via crease line LT. The first bottom seal II28 of each of the folded parts A2 and B3 is sealed and bonded to the second bottom seal II29. This achieves good adhesion, a reasonable structure, a cross-shaped bonding, an aesthetically pleasing structure, and prevents deformation of any surface, ensuring balanced stress distribution.

[0148] like Figure 7-16 The bottom sealing device of this embodiment is preferably used for bottom sealing of folded packaging container structures; it includes at least one of the following workstations of this embodiment:

[0149] The side cover folding station 31 uses a mold to fold and / or bond the first side cover 6 to the outer side of the first side in the opposite direction to the bonding direction of the second side cover 7 to the outer side of the second side.

[0150] The filling station 32 is filled by the filling machine 49 from the bottom sealing port 39 of the folded packaging body 1;

[0151] The bottom cover folding station 33 folds the bottom 5 to make the bottom cover 10 fit together;

[0152] The bottom seal sealing station 34 seals the bottom seal 10 through the bottom seal sealing adhesive joint 59.

[0153] At the bottom seal side folding station 35, the sealed bottom seal 10 is rotated 90° to the side;

[0154] Bottom folding station 36 folds bottom folding ears A8 and B9 together;

[0155] At bottom bonding station 37, the bottom folding ear A8 is bonded to the bottom 5;

[0156] At the bottom sealing side bonding station 38, the bottom sealing part 10 is bonded to the bottom 5;

[0157] A workstation connection device 50 is installed between workstations, which can be adapted and modified using common mechanisms such as robotic arms and conveyor belts. Only the main workstations are described here; other auxiliary workstations are not shown as this is common knowledge.

[0158] As an example, a side-folding bottom fixture 40 is provided at the side cover folding station 31. A side-folding center hole 41 corresponding to the bottle cap 4 is provided on the side-folding bottom fixture 40 to achieve positioning. A side-folding outer mold 42 for mating movement is provided on the side-folding bottom fixture 40. The side-folding outer mold 42 is connected to a side-folding drive rod 43. The side-folding outer mold 42 has a U-shaped structure. The concave side-folding surface 44 in the middle corresponds to the front surface 13. A side-folding process end face 46 is provided at one end of the side-folding outer mold 42, and a side-folding L-step 45 is provided at the other end. Thus, the shaping, inner support, outer extrusion, and bottom support are used to achieve positioning and folding extrusion.

[0159] As an example, the side folding process end face 46 corresponds to the side edge of the second side sealing part 7 or the first side sealing part 6, and the side folding L step 45 corresponds to the outer surface of the first side sealing part 6 or the second side sealing part 7.

[0160] An inner forming mandrel mold 48 is inserted into the bottom sealing opening 39 of the folded packaging body 1, and a side folding top head 47 for upward lifting is provided below the side folding center hole 41.

[0161] The first side sealing part 6 is bonded to the outer side of the first side opposite to the bonding direction of the second side sealing part 7 to the outer side of the second side by using a mold;

[0162] A bottom seal folding lifting guide 52 is provided above the bottom cover folding station 33. A bottom seal folding guide spring 53 in the shape of an octagon is connected to the lower end of the bottom seal folding lifting guide 52 to prevent the folded part A2 and the folded part B3 from folding inward. A bottom seal folding end face side step 54 for supporting the folded part A2 and the folded part B3 is provided on the outside of the folded part A2 and the folded part B3. A bottom seal side swinging mold block 55 for changing the first bottom surface 20 and the second bottom surface 21 from vertical to horizontal is provided on the outside of the first side and the second side.

[0163] At the bottom sealing station 34, the bottom sealing part 10 is sealed by the bottom sealing adhesive joint 59;

[0164] At the bottom seal side folding station 35, the sealed bottom seal 10 is rotated 90° to the side;

[0165] Bottom folding station 36 folds bottom folding ears A8 and B9 together;

[0166] At bottom bonding station 37, the bottom folding ear A8 is bonded to the bottom 5;

[0167] At the bottom seal side bonding station 38, the bottom seal 10 is bonded to the bottom 5. This achieves a reasonable arrangement of the existing production line, thereby realizing the forming of the container of the present invention.

[0168] Preferably, the workstation connection device 50 includes a linear reciprocating die or a circulating conveyor belt; a workstation connection process port 66 is provided on the linear reciprocating die or the circulating conveyor belt; an external shaping mold 65 adapted to the shape of the folded packaging body 1 is provided on the workstation connection process port 66; and a workstation upper push rod 51 for uppering the bottle cap 4 is provided below the workstation connection process port 66; thereby realizing mold release.

[0169] The stationary process recess 67 is provided on the external shaping mold 65 to align with the second top folding ear 11 or the first upper folding ear 12; the process is reasonable and facilitates rapid and reasonable shaping.

[0170] At the bottom sealing station 34, a pair of swinging bottom sealing adhesive side pressing mold blocks 56 are provided on the outer side of the first side and the second side, which respectively press down on the folded first bottom surface 20 and second bottom surface 21.

[0171] A bottom sealing shaping end face side step 57 is provided on the outside of the folded part A2 and the folded part B3 for supporting the bottom fold A8 and the bottom fold B9; and a bottom sealing folding pressing mold 58 is provided above the bottom sealing shaping end face side step 57 for pressing the bottom fold A8 and the bottom fold B9 on the bottom sealing shaping end face side step 57 after descending.

[0172] A bottom sealing and bonding lifting head 60 is provided on the bottom sealing and bonding joint 59;

[0173] The bottom seal side folding station 35 is equipped with a bottom seal side pressing mold 61 that is oscillating, rolling or lifting, which flips the sealed bottom seal 10 90° to the side.

[0174] At the bottom folding station 36, a bottom sealing folding end face side top mold 62 is fixed, rolled, stretched or oscillated for pressure contact with the outer side of the front surface 13. A bottom sealing folding mold 63 and / or bottom sealing folding mold 63 is oscillated above the bottom sealing folding end face side top mold 62 to fold the corresponding bottom folding A8 and bottom folding B9.

[0175] The bottom bonding station 37 is equipped with a bottom sealing folding joint 64 for bonding the bottom folding ears A8 and B9 to the bottom 5. Through the combination and improvement of existing technologies, effective and rapid production is achieved, ensuring safety.

[0176] The bottom sealing process of this embodiment is used to seal the bottom of a folded packaging container structure; the process includes the following steps; the process flow in the accompanying drawings is not exhaustive, and reasonable changes, additions, and adjustments are all within the scope of protection of this invention.

[0177] Step 1: Side sealing. The first side sealing part 6 and the second side sealing part 7 are sealed by welding machine, bonding machine or hot air blower.

[0178] Step 2, side sealing edge folding: using a mold or manually, fold the first side sealing part 6 in the opposite direction to the outer side of the first side, and fold the second side sealing part 7 in the opposite direction to the outer side of the second side.

[0179] Step 3: Fold the bottom edge in half. Fold the bottom 5 along the crease line using a mold or manually to make the bottom sealing part 10 align; wherein, the aligning surface of the bottom sealing part 10 is perpendicular to the aligning surface of the first side sealing part 6.

[0180] Step 4: Bottom sealing edge sealing. The bottom sealing part 10 is sealed by welding machine, bonding machine or hot air blower.

[0181] Step 5: Fold the bottom edge sideways. Fold the bottom edge 10 sideways using a mold or manually.

[0182] Step 6: Side bonding of bottom edge sealing. Use a welding machine, bonding machine, or hot air blower to bond the bottom sealing part 10 to the bottom 5.

[0183] After step five, firstly, the first upper folding ear 12 and the second top folding ear 11 are folded over and brought into contact with the bottom sealing part 10 by means of a mold or manual operation; then, the bottom folding ear is bonded by means of a welding machine, bonding machine or hot air blower to bond the first upper folding ear 12 and the second top folding ear 11 to the bottom sealing part 10 respectively.

[0184] After step two, side bonding is performed. The first side sealing part 6 is bonded to the outer side of the first side in the opposite direction to the bonding direction of the second side sealing part 7 to the outer side of the second side using a mold.

[0185] After step two, the filling machine 49 fills the package from the bottom sealing port 39 of the folded package 1;

[0186] After step two or after step one, and before step three, the bottom folding ears A8 and B9 are pre-formed and folded using a mold or manually, so that the bottom 5 fold lines have crease memory.

[0187] The present invention has been described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed in detail.

[0188] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of the present invention can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable packaging container structure, comprising a foldable packaging body (1), which, when folded, forms a cavity for accommodating a cargo; The upper opening is located above the folded packaging body (1); The bottom (5) is opposite to the upper opening; Fold A (2) and fold B (3) are joined together; the front surface (13) of fold A (2) and the front surface (13) of fold B (3) serve as the corresponding front of the folded packaging body (1) and are located between the bottom (5) and the upper opening; at least a first side and a second side are provided between the front and the bottom (5) and the upper opening. The cavity is located in the bottom (5), the upper opening, the folded part A (2), the folded part B (3), the first side and the second side; a) The first side seal (6) and the second side seal (7) are side seals after the folded part A (2) and the folded part B (3) are joined together. The bonding direction of the first side seal (6) and the outer side of the first side is opposite to the bonding direction of the second side seal (7) and the outer side of the second side. b) When the first side seal (6) is bonded to the outer wall of the folded part A (2), the second side seal (7) is bonded to the outer wall of the folded part B (3); c), bottom fold A (8), whose root is connected to the lower part of the front surface part (13) of the folded part A (2) and has a crease line CD at the connection; bottom fold B (9), whose root is connected to the lower part of the front surface part (13) of the folded part B (3) and has a first crease line parallel to the crease line CD at the connection. d), bottom sealing part (10), serves as the bottom sealing part after the folded part A (2) and the folded part B (3) are joined; the bottom sealing part (10) is not coplanar with the first side sealing part (6) and the bottom sealing part (10) is not coplanar with the second side sealing part (7); e) On the first side, there is a shaped concave A (68) between the inner wall of the folded portion A (2) and the folded portion B (3), and on the second side, there is a shaped concave B (69) between the inner wall of the folded portion A (2) and the folded portion B (3) that intersects with the shaped concave A (68). f), in the direction of projection from the first side to the second side, the mating surface of the bottom seal (10) is perpendicular to the mating surface of the first side seal (6) and the mating surface of the second side seal (7); g), the upper opening has a bottle cap at least after the cavity is filled (4); h), the sealing treatment of the first side seal (6) and the sealing of the second side seal (7) are carried out simultaneously or separately; The crease line CD and the first crease line are the edge lines of the bottom (5); The bottom folded lug A(8) and the first upper folded lug (12) are isosceles triangles or isosceles trapezoids; The first upper fold (12) is located on the upper part of the first side, and the second top fold (11) is located on the upper part of the second side. In the unfolded state of the folded package (1), the crease line CD is perpendicular or oblique to the crease line VW at the root of the first upper fold (12) or the crease line XY at the root of the second top fold (11), and the first crease line is perpendicular or oblique to the crease line VW at the root of the first upper fold (12) or the crease line XY at the root of the second top fold (11).

2. The folding packaging container structure according to claim 1, characterized in that: Folded portion A (2) and folded portion B (3) include the front surface portion (13); The first side surface (14) is connected to the side surface (13) by a crease line WC and folded to the first side surface; The second side surface (15) is connected to the other side of the front surface (13) by a crease line YD and folded to the second side surface; The first side sealing part (16) is connected to one side of the first side surface part (14); The second side sealing part (17) is connected to one side of the second side surface part (15); The first side seal (16) of the folded part A (2) and the first side seal (16) of the folded part B (3) are sealed and bonded to form the first side seal, and the second side seal (17) of the folded part A (2) and the second side seal (17) of the folded part B (3) are sealed and bonded to form the second side seal; The first bottom folded surface (18) is connected to the waist of the bottom folded surface (8) through the crease line CG and then folded to the bottom (5). The first bottom surface (20) is connected to the first side surface (14) through the crease line BC and to the first bottom folding surface (18) through the crease line CI. After folding, it reaches the bottom (5). After folding, the first bottom folding surface (18) is located between the bottom folding surface (8) and the first bottom surface (20). The second bottom folded ear folding surface (19) is connected to the other side of the bottom folded ear A (8) through the fold line DG and folded to the bottom (5); The second bottom surface (21) is connected to the second side surface (15) by the crease line DE and to the second bottom folding surface (19) by the crease line DK. After folding, it reaches the bottom (5). After folding, the second bottom folding surface (19) is located between the bottom folding surface (8) and the second bottom surface (21). The first directional side seal I (22) is connected to the first side seal part (16) through the crease line AB and to the first bottom surface (20) through the crease line BH. After being folded, it reaches the bottom (5). After being folded, the first directional side seal I (22) of the folded part A (2) and the first directional side seal I (22) of the folded part B (3) are bonded together to form part of the bottom seal part (10). The second directional side seal I (23) is connected to the second side seal (17) through the crease line EF and to the second bottom surface (21) through the crease line EL. After being folded, it reaches the bottom (5). After being folded, the second directional side seal I (23) of the folded part A (2) and the second directional side seal I (23) of the folded part B (3) are bonded together to form part of the bottom seal (10). The first re-side seal II (24) is connected to the first reversing side seal I (22) through the crease line GH. After folding, the first re-side seal II (24) of the folded part A (2) and the first re-side seal II (24) of the folded part B (3) are bonded together to form the first connecting part with the first side seal (6). The second re-side seal II (25) is connected to the second reversing side seal I (23) through the crease line LM. After folding, the second re-side seal II (25) of the folded part A (2) and the second re-side seal II (25) of the folded part B (3) are bonded together to form a second connecting part with the second side seal part (7); the shaped concave A (68) corresponds to the first connecting part, and the shaped concave B (69) corresponds to the second connecting part; The first bottom sealing part I (26) is connected to the first bottom folding lug folding surface (18) through the crease line IG. The second bottom sealing part I (27) is connected to the second bottom folding ear folding surface (19) through the fold line KG. The first bottom sealing part I (26) and the second bottom sealing part I (27) of the folded part A (2) and the folded part B (3) are connected and sealed together through the fold line GR. The first bottom seal II (28) is connected to the first bottom seal I (26) via crease line IQ, connected to the first bottom surface (20) via crease line HI, and connected to the first re-side seal II (24) via crease line HP; The second bottom seal II (29) is connected to the second bottom seal I (27) by crease line KS, connected to the second bottom surface (21) by crease line KL, and connected to the second re-side seal II (25) by crease line LT; the first bottom seal II (28) and the second bottom seal II (29) of each of the folded parts A (2) and B (3) are sealed and bonded together.

3. A bottom sealing device, characterized in that: Used for bottom sealing of the foldable packaging container structure as described in claim 1; The side cover folding station (31) uses a mold to fold and / or bond the first side cover (6) to the outside of the first side in the opposite direction to the bonding direction of the second side cover (7) to the outside of the second side. The filling station (32) uses a filling machine (49) to fill the package from the bottom sealing port (39) of the folded package (1); The bottom cover folding station (33) folds the bottom (5) to make the bottom cover (10) fit together; The bottom sealing station (34) seals the bottom sealing part (10) through the bottom sealing adhesive joint (59); Bottom seal side folding station (35): The sealed bottom seal (10) is flipped 90° to the side; The bottom folding station (36) folds the bottom folding ears A (8) and B (9); At the bottom bonding station (37), the bottom folding ear A (8) is bonded to the bottom (5); Bottom seal side bonding station (38) bond the bottom seal (10) to the bottom (5); Workstation connection devices (50) are provided between workstations.

4. The bottom sealing device according to claim 3, characterized in that: At the side cover folding station (31), a side folding bottom fixture (40) is provided, and a side folding center hole (41) corresponding to the bottle cap (4) is provided on the side folding bottom fixture (40); a side folding outer mold (42) for mating movement is provided on the side folding bottom fixture (40), and a side folding drive rod (43) is connected to the side folding outer mold (42). The side folding outer mold (42) has a U-shaped structure, and the middle side folding concave surface (44) corresponds to the front surface (13). One end of the side folding outer mold (42) is provided with a side folding process end face (46), and the other end is provided with a side folding L-step (45). The side folding process end face (46) corresponds to the side edge of the second side seal (7) or the first side seal (6), and the side folding L step (45) corresponds to the outer surface of the first side seal (6) or the second side seal (7). An inner forming mandrel mold (48) is inserted into the bottom sealing opening (39) of the folded packaging body (1), and a side folding top head (47) for top is provided below the side folding center hole (41); The first side seal (6) is bonded to the outer side of the first side in the opposite direction to the bonding direction of the second side seal (7) to the outer side of the second side. A bottom seal folding lifting guide (52) is provided above the bottom cover folding station (33). A bottom seal folding guide spring (53) in the shape of an octagon and preventing the folded part A (2) and the folded part B (3) from folding inward is connected to the lower end of the bottom seal folding lifting guide (52). A bottom seal folding end face side step (54) for supporting the folded part A (2) and the folded part B (3) is provided on the outside of the folded part A (2) and the folded part B (3). A bottom seal side swinging mold block (55) for changing the first bottom surface (20) and the second bottom surface (21) from vertical to horizontal is provided on the outside of the first side and the second side. At the bottom seal sealing station (34), the bottom seal part (10) is sealed by the bottom seal sealing adhesive joint (59). Bottom seal side folding station (35): The sealed bottom seal (10) is flipped 90° to the side; Bottom folding station (36) folds bottom folding ears A (8) and bottom folding ears B (9); At the bottom bonding station (37), the bottom folding ear A (8) is bonded to the bottom (5); At the bottom sealing side bonding station (38), the bottom sealing part (10) is bonded to the bottom (5).

5. The bottom sealing device according to claim 3, characterized in that: The station connection device (50) includes a linear reciprocating die or a circulating conveyor belt; a station connection process port (66) is provided on the linear reciprocating die or the circulating conveyor belt; a station external shaping mold (65) adapted to the shape of the folded packaging body (1) is provided on the station connection process port (66); and a station upper push rod (51) for upper bottle cap (4) is provided below the station connection process port (66). A process recess (67) is provided on the external shaping mold (65) to align with the second top fold (11) or the first upper fold (12); At the bottom sealing station (34), a pair of swinging bottom sealing adhesive side pressing mold blocks (56) are provided on the outer side of the first side and the second side, which press down on the folded first bottom surface (20) and second bottom surface (21) respectively. A bottom sealing shaping end face side step (57) is provided on the outside of the folded part A (2) and the folded part B (3) for supporting the bottom fold A (8) and the bottom fold B (9); a bottom sealing folding pressing mold (58) is provided above the bottom sealing shaping end face side step (57) for pressing the bottom fold A (8) and the bottom fold B (9) on the bottom sealing shaping end face side step (57) after descending; A bottom sealing and bonding lifting head (60) is provided on the bottom sealing and bonding joint (59); The bottom seal side folding station (35) is equipped with a bottom seal side pressing mold (61) that swings, rolls or lifts, which flips the sealed bottom seal (10) 90° to the side. At the bottom folding station (36), a bottom sealing folding end face side top mold (62) is fixed, rolled, stretched or swung to make pressure contact with the outer side of the front surface (13). A bottom sealing folding mold (63) is swung above the bottom sealing folding end face side top mold (62) to fold the corresponding bottom folding A (8) and bottom folding B (9). The bottom bonding station (37) is equipped with a bottom sealing folding joint (64) for bonding the bottom folding ear A (8) and the bottom folding ear B (9) to the bottom (5).

6. A bottom sealing process, characterized in that: This process is used to seal the bottom of the foldable packaging container structure as described in claim 2; the process includes the following steps; Step 1: Seal both sides simultaneously or sequentially, and perform heat treatment bonding and sealing on the first side seal (6) and the second side seal (7) respectively; Step 3: Fold the bottom edge in half. Fold the bottom (5) along the crease line using a mold or manually to make the bottom sealing part (10) align; wherein the aligning surface of the bottom sealing part (10) is perpendicular to the aligning surface of the first side sealing part (6); Step 4: Bottom sealing edge sealing. The bottom sealing part (10) is heat-processed and bonded for sealing.

7. The bottom sealing process according to claim 6, characterized in that: In step one, when the first side seal (6) is sealed, the first re-side seal II (24) and the first re-side seal II (24) of the folded part B (3) are bonded together to form a first connecting part with the first side seal (6); When the second side seal (7) is sealed, the second re-side seal II (25) of the folded part A (2) and the second re-side seal II (25) of the folded part B (3) are bonded together to form a second connecting part with the second side seal (7); Step two, fold the side seams. When the side sealing edge is folded, the first side sealing part (6) is folded in the same direction or opposite to the direction of the outer side of the first side by means of a mold or by manual means; Before or after step one, there are the following steps: the first side and the second side are folded together. When the first side and the second side are folded together, one side of the first side surface (14) is connected to one side of the front surface (13) through the crease line WC and folded to the first side; one side of the second side surface (15) is connected to the other side of the front surface (13) through the crease line YD and folded to the second side. Step 5: Fold the bottom edge sideways. Fold the bottom edge (10) sideways using a mold or manually. After step five, firstly, the first upper folding ear (12) and the second top folding ear (11) are folded over and brought into contact with the bottom sealing part (10) by means of a mold or manual operation; then, the bottom folding ear is bonded by means of a welding machine, bonding machine or hot air blower to bond the first upper folding ear (12) and the second top folding ear (11) to the bottom sealing part (10) respectively. After step two, side bonding is performed. The first side sealing part (6) is bonded to the outer side of the first side in the opposite direction to the bonding direction of the second side sealing part (7) to the outer side of the second side using a mold. After step two, the filling machine (49) fills the package from the bottom sealing port (39) of the folded package (1); After step two or after step one, and before step three, the bottom folding ears A (8) and B (9) are pre-formed and folded by means of a mold or by manual means, so that the bottom (5) fold line produces fold memory.

8. The bottom sealing process according to claim 6, characterized in that: In step three, the folding of the bottom edge includes... Fold the first directional side seal I (22), the first bottom surface (20), the first bottom folded surface (18), the second bottom folded surface (19), the second bottom surface (21), and the second directional side seal I (23) along the fold lines AB, BC, CG, DG, DE and EF respectively; Fold the first re-side seal II (24), the first bottom seal II (28), the first bottom seal I (26), the second bottom seal I (27), the second bottom seal II (29) and the second re-side seal II (25) along the fold lines GH, HI, IG, GK, KL and LM respectively, so that the first bottom seal II (28) and the second bottom seal II (29) are attached, and the first bottom seal I (26) and the second bottom seal I (27) are attached; When the first re-side seal II (24) and the second re-side seal II (25) are folded together on the same side, the shaped concave A (68) on both sides are aligned and fitted together. When the first re-side seal II (24) and the second re-side seal II (25) are folded together on opposite sides, the arch formed by the folding of the first re-side seal II (24) is fitted together with the shaped concave A (68) formed by the folding of the second re-side seal II (25), and the arch formed by the folding of the second re-side seal II (25) is fitted together with the shaped concave A (68) formed by the folding of the first re-side seal II (24), forming the bottom sealing edge. In step four, the bottom edge is sealed by heat-processing and bonding the bottom sealing part (10). After step five, fold along the crease line DC to the bottom fold ear A (8) and set it up.

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