Bottom closure device for a folding packaging container and process

Abstract

The application relates to a bottom sealing device and process of a folding packaging container, which comprises a folding packaging body, an upper opening, a bottom, a folding part A and a folding part B, a front surface part of the folding part A and a front surface part of the folding part B as corresponding front surfaces of the folding packaging body and located between the bottom and the upper opening, and first and second side surfaces located between the bottom and the upper opening.

Description

Technical Field

[0001] This invention relates to a bottom sealing device and process for folding packaging containers of beverages, preferably relating 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] Currently, the bottom sealing process is unreasonable, which easily leads to leakage or deformation, and uneven thickness.

[0005] To address the aforementioned technical issues, some manufacturers currently use PP / PE strips or adhesive strips to bond the bottom by overlapping the inner and outer surfaces, which in turn affects the hygiene and health of the beverage. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a bottom sealing device and process for folding packaging containers.

[0007] To solve the above problems, the technical solution adopted by the present invention is: a bottom sealing device for folding packaging containers, a bottom sealing component for folding the bottom of the packaging body, the bottom sealing component including a bottom sealing frame; and a station change rack is provided on the bottom sealing frame;

[0008] Several contoured sleeves are installed on the workstation changing rack;

[0009] A first side push clamping arm and a second side push clamping arm are provided in the bottom sealing machine frame;

[0010] A bottom sealing station is provided in the bottom sealing machine frame; at the bottom sealing station, the first side push clamping arm and the second side push clamping arm engage to clamp and form the bottom sealing part of the folded package;

[0011] A seventh lower plate is raised and lowered above the bottom sealing station. The seventh lower plate is used to press down on the inner wall of the folded packaging, making the bottom opening of the folded packaging flat.

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

[0013] A first drive swing arm driven by a power source is set above the bottom sealing machine frame. A second rotating rod is set on the bottom sealing machine frame. The end of the first drive swing arm is hinged to the second rotating rod. The root of the third linkage arm is keyed to the second rotating rod. A fifth upright rod is set in the bottom sealing machine frame. A sixth pressure plate is hinged to the end of the third linkage arm through a fourth hinge arm. A seventh lower insert plate is set on the lower surface of the sixth pressure plate. The sixth pressure plate has a guide hole that passes through the fifth upright rod.

[0014] The cross-section of the conforming sleeve is a square hole, a hexagonal hole, or an octagonal hole;

[0015] The upper inlet of the conformal sleeve has an upper guide flared opening;

[0016] The lower side of the contoured sleeve has a lower process notch.

[0017] A matching cylinder is installed on the side wall of the bottom sealing machine frame, and the matching cylinder drives a reciprocating push rod.

[0018] The first side push clamping arm and the second side push clamping arm are respectively connected to the corresponding reciprocating push rod, or the first side push clamping arm is connected to the corresponding reciprocating push rod and the second side push clamping arm is fixedly set.

[0019] The front end of the seventh lower insert plate has a chamfer.

[0020] A welding machine or a first-side push-clamping arm and a second-side push-clamping arm are set up at the bottom sealing station as heat sealing heads;

[0021] The first and second side push clamping arms have a vertical and a horizontal surface at right angles, respectively. The vertical surface contacts the outer wall of the bottom seal and is used to press down on the bottom surface.

[0022] The workstation change rack can be detached or fixed; the contour sleeve can be detached or fixed.

[0023] For the folded packaging body, the inner side wall of the folded packaging body that contacts the seventh lower insert plate corresponds to the first bottom folding ear folding surface and the second bottom folding ear folding surface;

[0024] The bottom sealing part corresponds to the bottom sealing part formed by the first bottom sealing part I, the second bottom sealing part 1, the first bottom sealing part II and the second bottom sealing part II, and the bottom surface corresponds to the bottom.

[0025] A bottom sealing process for a folded packaging container, using the device described in claim 1, comprises the following steps: First, the folded packaging body to be folded at the bottom is placed into a conformal sleeve; then, at the bottom sealing station, the seventh lower insert plate presses down on the inner wall of the folded packaging body, causing the bottom opening of the folded packaging body to flatten; second, the first side push clamping arm and the second side push clamping arm press against the folded packaging body, causing the bottom sealing area of ​​the folded packaging body to be fitted together and the bottom surface to be pressed down and shaped.

[0026] 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

[0027] Figure 1 This is a schematic diagram of the structure of prior art 1 of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of prior art 2 of the present invention.

[0029] Figure 3 This is a schematic diagram of the first improved structure of the present invention.

[0030] Figure 4 This is a schematic diagram of the unfolded structure of the composite paper of the present invention.

[0031] Figure 5 This is a schematic diagram of the composite paper structure of the present invention.

[0032] Figure 6 This is a schematic diagram of the composite paper structure before folding.

[0033] Figure 7 This is a schematic diagram of the overall structure of the bottom seal of the present invention.

[0034] Figure 8 This is a schematic diagram of the bottom seal explosion structure of the present invention.

[0035] Figure 9 This is a schematic diagram of the internal structure of the bottom seal of the present invention.

[0036] in:

[0037] 1. Folded package 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 top 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 folded surface; 20. First bottom surface; 21. Second bottom surface; 22. First reversing side seal I; 23. Second reversing side seal I; 24. First reversing side seal II; 25. Second reversing 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; 68. Molded recess A; 69. Molded recess B.

[0038] 90. Bottom sealing assembly; 91. Bottom sealing machine frame; 92. Station changing frame; 93. Contouring sleeve; 94. Upper guide flare; 95. Lower process notch; 96. Alignment cylinder; 97. Reciprocating push rod; 98. First side push clamping arm; 99. Second side push clamping arm; 100. Bottom sealing station; 101. First drive swing arm; 102. Second rotating rod; 103. Third linkage arm; 104. Fifth upright rod; 105. Fourth hinged arm; 106. Sixth pressure plate; 107. Seventh lower insert plate. Detailed Implementation

[0039] like Figure 1-9 As shown in the figure, the bottom sealing device for the folding packaging container in this embodiment is a bottom sealing component 90 used to fold the bottom of the folded packaging body 1. It can be installed on the ground, on a platform, or in other locations. The bottom sealing component 90 includes a bottom sealing frame 91, the shape of which is not limited by the figure and can be L-shaped, cage-like, gantry-shaped, or other conventional parts. A workstation changing frame 92 is provided on the bottom sealing frame 91. It can be operated as a whole by a push rod or a robot arm for convenient replacement and improved efficiency, or it can be replaced manually. This invention can be operated in multiple rows.

[0040] Several contoured sleeves 93 are provided on the workstation changing rack 92, preferably with square inner holes, so as to facilitate replacement;

[0041] The bottom sealing frame 91 is provided with a first side push clamping arm 98 and a second side push clamping arm 99, which simulate human hands to achieve bottom folding. It can be set with both arms movable or one arm fixed and one arm movable. It is preferred to adopt a right angle structure to facilitate one-time molding.

[0042] A bottom sealing station 100 is provided in the bottom sealing frame 91; at the bottom sealing station 100, the first side push clamping arm 98 and the second side push clamping arm 99 engage to clamp and form the bottom sealing part of the folded packaging body 1; thereby realizing the folding and forming.

[0043] Above the bottom sealing station 100, there is a seventh lower insert plate 107 that is raised and lowered. The seventh lower insert plate 107 is used to press down on the inner wall of the folded packaging body 1, making the bottom opening of the folded packaging body 1 flat. As an innovation, it solves the problem of reverse folding and waste products generated during the current folding process.

[0044] As a driving method for the lower insert plate, a crankshaft connecting rod or push rod can be used. Preferably, the present invention adopts a linkage mechanism. A first driving swing arm 101 driven by power is provided above the bottom sealing frame 91. A second rotating rod 102 is provided on the bottom sealing frame 91. The end of the first driving swing arm 101 is hinged to the second rotating rod 102. The root of the third linkage arm 103 is keyed to the second rotating rod 102. A fifth upright rod 104 is provided in the bottom sealing frame 91. A sixth pressure plate 106 is hinged to the end of the third linkage arm 103 through a fourth hinge arm 105. A seventh lower insert plate 107 is provided on the lower surface of the sixth pressure plate 106. The sixth pressure plate 106 has a guide hole that passes through the fifth upright rod 104, thereby realizing continuous guiding drive.

[0045] The cross-section of the contoured sleeve 93 is in the form of a square hole, a hexagonal hole, or an octagonal hole, or a variation thereof;

[0046] The upper inlet of the contour sleeve 93 has an upper guide flared mouth 94, which facilitates insertion and also facilitates folding and shaping.

[0047] The lower side of the contour sleeve 93 has a lower process notch 95, which allows for removal and reduces friction during the stroke.

[0048] A matching cylinder 96 is provided on the side wall of the bottom sealing frame 91. The matching cylinder 96 drives a reciprocating push rod 97, which is preferred, but other linear reciprocating methods can be used.

[0049] As an example, the first side push clamping arm 98 and the second side push clamping arm 99 are respectively connected to the corresponding reciprocating push rod 97, or the first side push clamping arm 98 is connected to the corresponding reciprocating push rod 97 and the second side push clamping arm 99 is fixedly set.

[0050] The seventh lower insert plate 107 has a chamfer at the front end to achieve contouring, which allows the bottom opening to open better to both sides into a duckbill shape. At the same time, the chamfer is used to press against the inclined surface, which helps to open and shape better.

[0051] A welding machine or a first side push clamping arm 98 and a second side push clamping arm 99 are provided at the bottom sealing station 100 as heat sealing heads;

[0052] The first side push clamping arm 98 and the second side push clamping arm 99 have a vertical surface and a horizontal surface at right angles, respectively. The vertical surface contacts the outer wall of the bottom seal and is used to press down to form the bottom surface.

[0053] The workstation changing rack 92 can be detached or fixed; the contour sleeve 93 can be detached or fixed, thus enabling automated control and allowing for the replacement of different mold tooling sleeves for different specifications of packaging containers.

[0054] As described in conjunction with the accompanying drawings, for the folded packaging body 1, the inner sidewall of the folded packaging body 1 that is in contact with the seventh lower insert plate 107 corresponds to the first bottom folding ear folding surface 18 and the second bottom folding ear folding surface 19.

[0055] The bottom sealing portion corresponds to the bottom sealing portion 10 formed by the first bottom sealing portion I26, the second bottom sealing portion I27, the first bottom sealing portion II28, and the second bottom sealing portion II29, and the bottom surface corresponds to the bottom 5, thereby facilitating the understanding of the function of the device of the present invention.

[0056] The bottom sealing process of the folded packaging container in this embodiment performs the following steps: First, the folded packaging body 1 with the bottom folded is placed into the conformal sleeve 93; then, at the bottom sealing station 100, the seventh lower insert plate 107 presses down on the inner wall of the folded packaging body 1, making the bottom opening of the folded packaging body 1 flatten; second, the first side push clamping arm 98 and the second side push clamping arm 99 press against the folded packaging body 1, so that the bottom sealing part of the folded packaging body 1 is fitted and shaped and the bottom surface is pressed down and shaped, thereby completing the automated bottom sealing folding, realizing the side sealing part and the bottom sealing part are staggered, thus achieving good sealing performance.

[0057] like Figure 1-9 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.

[0058] The upper opening, such as Figure 4 , 5 The 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 preferred 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.

[0059] The bottom part (5) is opposite to the opening at the top; it serves as the bottom and supports the container.

[0060] 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.

[0061] 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.

[0062] This invention includes at least one of the following solutions or a reasonable combination thereof;

[0063] 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 1 Folding 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.

[0064] 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).

[0065] 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.

[0066] 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.

[0067] 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.

[0068] f), the mating surfaces of the bottom sealing portion 10 are perpendicular to the mating surfaces of the first side sealing portion 6 and / or the mating surfaces of the second side sealing portion 7;

[0069] g) The upper opening has a cap at least after the cavity is filled;

[0070] h), the sealing treatment of the first side seal and the sealing of the second side seal are carried out simultaneously or separately.

[0071] Crease line CD and the first crease line are the edge lines of bottom 5;

[0072] In this invention, the fold line and the crease line 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.

[0073] 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.

[0074] like Figure 4 As an example, the folded portion A2 and / or the folded portion B3 includes a front surface portion 13;

[0075] 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;

[0076] 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.

[0077] The first side sealing portion 16 is connected to one side of the first side surface portion 14;

[0078] The second side sealing part 17 is connected to one side of the second side surface part 15 on one side.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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;

[0083] 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.

[0084] 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.

[0085] 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.

[0086] The first re-side seal II24, through the crease line GH, is folded together with the first re-side seal I22. 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 form the first connecting part between the bottom seal part 10 and the first side seal part 6.

[0087] 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 form the second connecting part of the bottom seal 10 and the second side seal 7.

[0088] 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.

[0089] 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.

[0090] 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;

[0091] 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.

[0092] 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.

[0093] 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.

[0094] Step 2, side sealing edge folding: using a mold or manually, fold the first side sealing part 6 and the outer side of the first side opposite to the bonding direction of the second side sealing part 7 and the outer side of the second side respectively;

[0095] 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.

[0096] Step 4: Bottom sealing edge sealing. The bottom sealing part 10 is sealed using a welding machine, bonding machine, or hot air blower.

[0097] Step 5: Fold the bottom edge sideways. Fold the bottom edge 10 sideways using a mold or manually.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] After step two, the filling machine fills the package from the bottom of the folded packaging 1 through the sealing port.

[0102] 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.

[0103] 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.

[0104] 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 bottom sealing device for a folding packaging container, characterized in that: A bottom sealing assembly (90) for folding the bottom of the folded package (1), the bottom sealing assembly (90) includes a bottom sealing frame (91); a station change rack (92) is provided on the bottom sealing frame (91); Several contoured sleeves (93) are provided on the workstation changing rack (92); A first side push clamping arm (98) and a second side push clamping arm (99) are provided in the bottom sealing frame (91); A bottom sealing station (100) is provided in the bottom sealing frame (91); at the bottom sealing station (100), the first side push clamping arm (98) and the second side push clamping arm (99) clamp and form the bottom sealing part of the folded package (1); A seventh lower insert plate (107) is raised and lowered above the bottom sealing station (100). The seventh lower insert plate (107) is used to press down the inner wall of the folded packaging body (1) so that the bottom opening of the folded packaging body (1) becomes flat. A first drive swing arm (101) driven by power is provided above the bottom sealing machine frame (91), and a second rotating rod (102) is provided on the bottom sealing machine frame (91). The end of the first drive swing arm (101) is hinged to the second rotating rod (102). The root of the third linkage arm (103) is keyed to the second rotating rod (102). A fifth upright rod (104) is provided in the bottom sealing machine frame (91). A sixth pressure plate (106) is hinged to the end of the third linkage arm (103) through a fourth hinge arm (105). A seventh lower insert plate (107) is provided on the lower surface of the sixth pressure plate (106). The sixth pressure plate (106) has a guide hole that passes through the fifth upright rod (104). For the folded packaging body (1), the inner sidewall of the folded packaging body (1) that is in contact with the seventh lower insert plate (107) corresponds to the first bottom folding ear folding surface (18) and the second bottom folding ear folding surface (19); The bottom sealing part corresponds to the bottom sealing part (10) formed by the first bottom sealing part I (26), the second bottom sealing part I (27), the first bottom sealing part II (28) and the second bottom sealing part II (29), and the bottom surface corresponds to the bottom (5).

2. The bottom sealing device for the folding packaging container according to claim 1, characterized in that: The cross-section of the conformal sleeve (93) is a square hole, a hexagonal hole, or an octagonal hole; The upper inlet of the conformal sleeve (93) has an upper guide flared mouth (94); The lower side of the contoured sleeve (93) has a lower process notch (95).

3. The bottom sealing device for the folding packaging container according to claim 1, characterized in that: A matching cylinder (96) is installed on the side wall of the bottom sealing machine frame (91), and the matching cylinder (96) drives a reciprocating push rod (97). The first side push clamping arm (98) and the second side push clamping arm (99) are respectively connected to the corresponding reciprocating push rod (97), or the first side push clamping arm (98) is connected to the corresponding reciprocating push rod (97) and the second side push clamping arm (99) is fixedly set.

4. The bottom sealing device for the folding packaging container according to claim 1, characterized in that: The front end of the seventh lower insert plate (107) has a chamfer.

5. The bottom sealing device for a folding packaging container according to claim 1, characterized in that: A welding machine or a first side push clamping arm (98) and a second side push clamping arm (99) are provided at the bottom sealing station (100) as heat sealing heads; The first side push clamping arm (98) and the second side push clamping arm (99) have a vertical surface and a horizontal surface at right angles, respectively. The vertical surface contacts the outer wall of the bottom seal and is used to press down the bottom surface.

6. The bottom sealing device for a folding packaging container according to claim 1, characterized in that: The workstation changing rack (92) can be detached or fixed; the contour sleeve (93) can be detached or fixed.

7. A bottom sealing process for a folding packaging container, characterized in that: The following steps are performed using the bottom sealing device of the folding packaging container as described in claim 1; First, the folded packaging body (1) with the bottom folded is placed into the conformal sleeve (93); then, at the bottom sealing station (100), the seventh lower insert plate (107) presses down on the inner wall of the folded packaging body (1), so that the bottom opening of the folded packaging body (1) becomes flat. Secondly, the first side push clamping arm (98) and the second side push clamping arm (99) press against the folded packaging body (1), so that the bottom seal of the folded packaging body (1) is formed and the bottom surface is pressed down to form a shape.

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