Inner and outer carton folding structure and forming method thereof

Abstract

The application discloses an inner and outer carton folding structure and a forming method thereof, which comprises an outer carton and an inner support. The outer carton comprises a carton body and a carton cover connected by a first folding line. The carton body and the carton cover are first folding structures obtained by die cutting a single sheet of paper. The inner support is a second folding structure obtained by die cutting a single sheet of paper. The application adopts the inner and outer carton folding structure to realize the forming of a single sheet of paper combined special-shaped carton, realizes the use of a single sheet of paper instead of surface paper and grey board as the production raw material of the outer carton and the inner support, saves the steps of grey board material and grey board slotting and die cutting, reduces the production cost, and the single sheet of paper has high plastic deformation, obvious knock-out and embossing effect, and good surface decoration effect. Moreover, the application can realize the pasting and folding of the single sheet of paper by using the existing automatic carton pasting machine and automatic folding machine, simplifies the production process, and improves the production efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of packaging boxes, and more specifically, to an inner and outer folding structure for assembling irregularly shaped paper boxes from single-sheet cardboard and forming thereof. Background Technology

[0002] Modularly shaped cardboard boxes typically consist of an outer box and an inner box. The outer box is usually assembled and pressed from a decorative linerboard and a grey board forming the frame. The linerboard is die-cut into semi-finished products according to the design, while the grey board is first die-cut into a flat shape according to the designed dimensions, then slotted, positioned, and glued together to form the outer box frame. Similarly, the inner box is also assembled and pressed from a decorative linerboard and a grey board forming the frame. The linerboard is die-cut into a semi-finished product according to the design, while the grey board is first die-cut into a flat shape according to the designed dimensions, then slotted, positioned, and glued together to form the inner box frame. As can be seen, the structure of the traditional modular irregularly shaped cardboard box's outer and inner boxes makes the forming process complex and involves a large amount of manual labor, resulting in low production efficiency and high production costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-sheet cardboard combined irregular-shaped paper box and its formed inner and outer paper box folding structure, so as to realize the replacement of face paper and gray board with single-sheet cardboard, save gray board material, reduce production costs, simplify the production process, and improve production efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A folding structure for inner and outer cardboard boxes is provided, including an outer box and an inner tray. The outer box includes a box body and a box lid connected by a first folding line. The box body and the box lid are a first folding structure obtained by die-cutting a single sheet of cardboard. The inner tray is a second folding structure obtained by die-cutting a single sheet of cardboard.

[0006] The single-sheet cardboard combination irregular-shaped paper box of the present invention uses a single-sheet cardboard instead of face paper and gray board as the production raw material for the outer box and inner tray, saving gray board material and reducing production costs; moreover, the first folding structure and the second folding structure can quickly form the outer box and inner tray, the production process is simple and can improve production efficiency.

[0007] Furthermore, the box lid includes a first box surface and a second box surface, the first box surface and the second box surface are connected, and a first support surface and a second support surface are respectively connected to both sides of the first box surface, and both sides of the second box surface are respectively engaged with the first support surface and the second support surface. After folding and forming, the first box surface and the second box surface are arranged perpendicularly, the first support surface and the second support surface serve as the sides of the box lid, and both the first support surface and the second support surface are right-angled triangular structures. The first box surface, the second box surface, the first support surface and the second support surface surround to form a triangular prism structure.

[0008] Furthermore, the second box surface is provided with first locking blocks on both sides, and the first support surface and the second support surface are provided with first locking slots, and the first locking blocks engage with the first locking slots. The engagement of the first locking blocks with the first locking slots can connect the second box surface and the first support surface and the second support surface into one unit.

[0009] Furthermore, a first reinforcing surface and a second reinforcing surface are connected between the first box surface and the second box surface, and the second box surface can be folded and laid between the first reinforcing surface and the second reinforcing surface. The first reinforcing surface and the second reinforcing surface can improve the load-bearing capacity of the box lid, and folding the second box surface between the first reinforcing surface and the second reinforcing surface helps to obtain an aesthetically pleasing appearance.

[0010] Furthermore, the first and second supporting surfaces are right-angled triangular structures. One right-angled side of each triangle connects to the first box surface, and the other right-angled side connects to a first connecting surface. These two sets of first connecting surfaces can be folded and laid between the second box surface and the first reinforcing surface. Laying these two sets of first connecting surfaces between the second box surface and the first reinforcing surface improves the load-bearing capacity of the lid and connects the first reinforcing surface, the first supporting surface, and the second supporting surface into a single unit.

[0011] Furthermore, the box body includes a first side, a second side, and a third side connected in sequence. The first side is connected to the first box surface via a first fold line. The second side has a third support surface and a fourth support surface connected to its two sides respectively. The two sides of the third side are engaged with the third support surface and the fourth support surface respectively. The engagement of the two sides of the third side with the third support surface and the fourth support surface forms a frustum structure around the first side, the second side, the third side, the third support surface, and the fourth support surface. When the box lid and the box body are closed, the bottom surface of the triangular prism of the box lid can coincide with the top surface of the frustum structure of the box body.

[0012] Furthermore, the third side surface is provided with second locking blocks on both sides, and both the third and fourth support surfaces are provided with second locking slots, with the second locking blocks engaging with the second locking slots; both the third and fourth support surfaces are connected to second connecting surfaces, which are bonded to the first side surface. Inserting the second locking blocks into the second locking slots allows for easy connection between the third side surface and the third and fourth support surfaces; bonding the two sets of second connecting surfaces to the first side surface allows for connection between the third and fourth support surfaces and the first side surface.

[0013] Furthermore, the inner tray includes a first tray surface, a second tray surface, and a third tray surface connected in sequence. A fifth support surface and a sixth support surface are respectively connected to both sides of the first tray surface. Third locking blocks are provided on both sides of the third tray surface. Both the fifth and sixth support surfaces are provided with third locking slots, and the third locking blocks engage with the third locking slots. The engagement of the third locking blocks with the third locking slots allows the first tray surface, second tray surface, third tray surface, fifth support surface, and sixth support surface to form a frustum-shaped structure similar to the shape of the box.

[0014] Furthermore, the side of the inner tray is fitted to the side of the box body, and the outer edge of the top of the inner tray is higher than the outer edge of the top of the box body. This arrangement guides the lid and box body to close together.

[0015] This invention also provides a method for forming a single-sheet cardboard assembly of irregularly shaped paper boxes based on a folding structure, comprising the following steps:

[0016] S10. Die-cut the cardboard into the outer box paper and the inner tray paper to be formed according to the pre-designed size and shape;

[0017] S20. The outer box paper to be formed in step S10 is conveyed to the glue application area for gluing: the first support surface and the second support surface are folded and glued to the first box surface; the third support surface and the fourth support surface are folded and glued to the second side surface;

[0018] S30. Fold the outer box paper to be formed by the bonding process in step S20 to obtain the outer box: fold the second box surface and snap the two sides of the second box surface to the first support surface and the second support surface respectively; fold the first side surface so that the two sides of the first side surface are connected to the third support surface and the fourth support surface respectively.

[0019] S40. The inner tray paper to be formed in step S10 is conveyed to the glue scraping area for gluing and bonding: the fifth support surface, the sixth support surface and the first tray surface are folded and bonded together.

[0020] S50. Fold the inner tray paper to be formed by the bonding process in step S40 to obtain the inner tray: Fold the third tray surface to both sides of the third tray surface and snap it into the fifth support surface and the sixth support surface respectively;

[0021] S60. Insert the inner tray from step S50 into the inner side of the outer box body described in step S30 to form a complete box.

[0022] The inner and outer paper box folding structure of this invention enables the forming of irregularly shaped paper boxes composed of single-sheet cardboard. It allows the use of single-sheet cardboard instead of face paper and grey board as the production raw material for the outer box and inner tray, saving grey board material and the steps of grey board grooving and die-cutting, thus reducing production costs. Moreover, the cardboard has high plasticity, obvious embossing and texturing effects, and has a better surface decoration effect. Furthermore, this invention can use existing automatic gluing machines and automatic folding machines to realize the gluing and folding of cardboard, simplifying the production process and improving production efficiency.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The inner and outer paper box folding structure of this invention enables the combination of single-sheet cardboard into irregularly shaped paper boxes. It allows the use of single-sheet cardboard instead of face paper and grey board as the production raw material for the outer box and inner tray, saving grey board material, reducing production costs, and the cardboard has high plasticity, obvious embossing and texturing effects, and good surface decoration effect. The forming method of single-sheet cardboard combination into irregularly shaped paper boxes eliminates the grey board grooving and die-cutting steps, and can use existing automatic gluing machines and automatic folding machines to realize the gluing and folding of cardboard, simplifying the production process and improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram showing the unfolded outer box of the irregularly shaped paper box assembled from a single sheet of cardboard, as described in Example 1.

[0026] Figure 2 This is a schematic diagram illustrating the folding process of the single-sheet cardboard combined with the outer box of the irregularly shaped paper box in Example 1;

[0027] Figure 3 This is a schematic diagram of the structure of the outer box of the irregularly shaped paper box assembled from a single sheet of cardboard, as described in Example 1.

[0028] Figure 4 This is a schematic diagram showing the unfolded inner tray of the irregularly shaped cardboard box according to Embodiment 1;

[0029] Figure 5 Schematic diagram I shows the folding process of the inner tray of the irregularly shaped cardboard box in Example 1;

[0030] Figure 6 Schematic diagram II of the folding process of the single-sheet cardboard combined with the inner tray of the irregularly shaped cardboard box in Example 1;

[0031] Figure 7 This is a schematic diagram of the structure of the inner tray of the irregularly shaped cardboard box according to Embodiment 1;

[0032] Figure 8 This is a schematic diagram of the structure of a single-sheet cardboard combined with an irregularly shaped paper box according to Example 1;

[0033] In the attached diagram: 100 - Outer box; 200 - Inner tray; 201 - First tray surface; 202 - Second tray surface; 203 - Third tray surface; 204 - Fifth support surface; 205 - Sixth support surface; 206 - Third locking block; 207 - Third latch; 208 - Third connecting surface; 300 - First fold line; 400 - Box body; 401 - First side; 402 - Second side; 403 - Third side; 404 - Third support surface; 405 - Fourth support surface; 406 - Second locking block; 407 - Second latch; 408 - Second connecting surface; 500 - Box lid; 501 - First box surface; 502 - Second box surface; 503 - First support surface; 504 - Second support surface; 505 - First locking block; 506 - First latch; 507 - First reinforcing surface; 508 - Second reinforcing surface; 509 - First connecting surface. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Example 1

[0037] like Figures 1 to 8The illustration shows an embodiment of the inner and outer box folding structure of the single-sheet cardboard combined irregular-shaped paper box of the present invention, including an outer box 100 and an inner tray 200, with the inner tray 200 disposed inside the outer box 100. The outer box 100 includes a box body 400 and a box lid 500 connected by a first folding line 300. The box body 400 and the box lid 500 are first folding structures obtained by die-cutting a single sheet of cardboard, and the inner tray 200 is a second folding structure obtained by die-cutting a single sheet of cardboard. In this embodiment, single-sheet cardboard is used instead of face paper and grey board as the production raw material for the outer box 100 and the inner tray 200, saving grey board material, eliminating the steps of grey board grooving and die-cutting, simplifying the production process, and reducing production costs.

[0038] like Figure 1 , Figure 2 As shown, the box cover 500 includes a first box surface 501 and a second box surface 502. The first box surface 501 and the second box surface 502 are connected. The two sides of the first box surface 501 are respectively connected to a first support surface 503 and a second support surface 504. The two sides of the second box surface 502 are respectively engaged with the first support surface 503 and the second support surface 504. After folding, the first box surface 501 and the second box surface 502 are set perpendicularly. The first support surface 503 and the second support surface 504 serve as the sides of the box cover 500, and both the first support surface 503 and the second support surface 504 are right-angled triangular structures. The first box surface 501, the second box surface 502, the first support surface 503, and the second support surface 504 form a triangular prism structure.

[0039] Specifically, the second box surface 502 has first locking blocks 505 on both sides, and the first support surface 503 and the second support surface 504 have first locking slots 506, with the first locking blocks 505 engaging with the first locking slots 506. In this embodiment, the use of the first locking blocks 505 engaging with the first locking slots 506 to connect the second box surface 502, the first support surface 503, and the second support surface 504 into one unit is a preferred option for ease of connection and is not intended as a limiting provision. To enhance the load-bearing capacity of the sides of the box cover 500, in this embodiment, the first support surface 503 and the second support surface 504 can be formed by folding two right-angled triangular structures together.

[0040] To improve the load-bearing capacity of the cardboard box lid 500: In this embodiment, a first reinforcing surface 507 and a second reinforcing surface 508 are connected between the first box surface 501 and the second box surface 502. During folding, the second box surface 502 can be folded to lie between the first reinforcing surface 507 and the second reinforcing surface 508, hiding the edge of the second box lid 500 and achieving an aesthetically pleasing appearance. In this embodiment, the first supporting surface 503 and the second supporting surface 504 are right-angled triangular structures. One right-angled side of the right-angled triangle structure is connected to the first box surface 501, and the other right-angled side is connected to the first connecting surface 509. The two sets of first connecting surfaces 509 can be folded to lie between the second box surface 502 and the first reinforcing surface 507. In this embodiment, the two sets of first connecting surfaces 509 overlap with the first reinforcing surface 507 and the second box surface 502. Figure 3 As shown.

[0041] like Figure 1 , Figure 2 As shown, the box body 400 includes a first side 401, a second side 402, and a third side 403 connected in sequence. The first side 401 is connected to the first box surface 501 via a first fold line 300. The second side 402 has a third support surface 404 and a fourth support surface 405 connected to its two sides respectively. The third side 403 is engaged with the third support surface 404 and the fourth support surface 405 on its two sides. The engagement of the third side 403 with the third support surface 404 and the fourth support surface 405 forms a frustum structure around the first side 401, the second side 402, the third side 403, the third support surface 404, and the fourth support surface 405. When the box cover 500 is closed to the box body 400, the bottom surface of the triangular prism of the box cover 500 coincides with the top surface of the frustum structure of the box body 400.

[0042] Specifically, the third side surface 403 has second locking blocks 406 on both sides, and the third support surface 404 and the fourth support surface 405 are both provided with second locking slots 407, with the second locking blocks 406 engaging with the second locking slots 407; the third support surface 404 and the fourth support surface 405 are both connected to a second connecting surface 408, which is bonded to the first side surface 401. In this embodiment, the third support surface 404 and the fourth support surface 405 are both obtained by folding at least two sets of trapezoidal structures, and after folding, the side near the third side surface 403 is not bonded but has an opening to form the second locking slot 407; in order to facilitate the insertion of the second locking blocks 406 into the second locking slots 407, the second locking blocks 406 in this embodiment can be obtained by folding multiple rectangular structures; in order to improve the load-bearing capacity of the box body 400, the third side surface 403 in this embodiment can be obtained by folding multiple sets of square structures.

[0043] like Figures 4 to 7As shown, the inner tray 200 includes a first tray surface 201, a second tray surface 202, and a third tray surface 203 connected in sequence. A fifth support surface 204 and a sixth support surface 205 are respectively connected to both sides of the first tray surface 201. Third locking blocks 206 are provided on both sides of the third tray surface 203. Both the fifth support surface 204 and the sixth support surface 205 are provided with third locking slots 207, which engage with the third locking blocks 206. The engagement of the third locking blocks 206 and the third locking slots 207 allows the first tray surface 201, the second tray surface 202, the third tray surface 203, the fifth support surface 204, and the sixth support surface 205 to form a frustum-shaped structure similar to the box body 400. To improve the load-bearing capacity of the inner tray 200, the fifth support surface 204 and the sixth support surface 205 in this embodiment are both multi-layered structures, and both the fifth support surface 204 and the sixth support surface 205 are connected to a third connecting surface 208. When folded, the third connecting surface 208 is laid between the second support surface 202 and the third support surface 203. The side of the inner tray 200 is fitted against the side of the box body 400, and the outer edge of the top of the inner tray 200 is higher than the outer edge of the top of the box body 400. The protruding part of the inner tray 200 guides the closure of the lid 500 and the box body 400. Figure 8 As shown.

[0044] Example 2

[0045] This embodiment is an example of a method for forming a single-sheet cardboard combined irregular-shaped paper box based on a folding structure, including the following steps:

[0046] S10. Die-cut the cardboard into the outer box paper and the inner tray paper to be formed according to the pre-designed size and shape;

[0047] S20. The outer box paper to be formed in step S10 is conveyed to the glue application area for gluing: the first support surface 503 and the second support surface 504 are folded and glued to the first box surface 501; the third support surface 404 and the fourth support surface 405 are folded and glued to the second side surface 402.

[0048] S30. Fold the outer box paper to be formed by the bonding process in step S20 to obtain the outer box 100: Fold the second box surface 502 and snap the two sides of the second box surface 502 to the first support surface 503 and the second support surface 504 respectively; fold the first side surface 401 so that the two sides of the first side surface 401 are connected to the third support surface 404 and the fourth support surface 405 respectively.

[0049] S40. The inner tray paper to be formed in step S10 is conveyed to the glue scraping area for gluing and bonding: the fifth support surface 204, the sixth support surface 205 and the first tray surface 201 are folded and bonded together.

[0050] S50. Fold the paper of the inner tray 200 to be formed by the bonding process in step S40 to obtain the inner tray 200: Fold the third tray surface 203 to the two sides of the third tray surface 203 and snap it into the fifth support surface 204 and the sixth support surface 205 respectively.

[0051] S60. Insert the inner tray 200 from step S50 into the inner side of the outer box 100 body 400 described in step S30 to form a complete box.

[0052] The die-cutting, gluing, and folding processes described above can all be completed using existing equipment. These steps effectively simplify the production process and improve production efficiency.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A folding structure for an irregularly shaped inner and outer cardboard box, comprising a box body (400) and an inner tray (200), characterized in that, The box body (400) and the box lid (500) are first folded structures obtained by die-cutting a single sheet of cardstock, and the inner tray (200) is a second folded structure obtained by die-cutting a single sheet of cardstock; The box body (400) includes a first side (401), a second side (402), and a third side (403) connected in sequence. The first side (401) is connected to the first box surface (501) by a first fold line (300). The second side (402) is connected to a third support surface (404) and a fourth support surface (405) on both sides respectively. The third side (403) is engaged with the third support surface (404) and the fourth support surface (405) on both sides respectively. The third side (403) is provided with a second locking block (406) on both sides. The third support surface (404) and the fourth support surface (405) are both provided with a second locking slot (407). The second locking block (406) is engaged with the second locking slot (407). The third support surface (404) and the fourth support surface (405) are both connected with a second connecting surface (408). The second connecting surface (408) is bonded to the first side (401). The inner support (200) includes a first support surface (201), a second support surface (202) and a third support surface (203) connected in sequence. The first support surface (201) is connected to a fifth support surface (204) and a sixth support surface (205) on both sides respectively. The third support surface (203) is provided with a third locking block (206) on both sides. The fifth support surface (204) and the sixth support surface (205) are both provided with a third locking slot (207). The third locking block (206) engages with the third locking slot (207). The lid (500) includes a first box surface (501) and a second box surface (502). The first box surface (501) and the second box surface (502) are connected. A first support surface (503) and a second support surface (504) are respectively connected to both sides of the first box surface (501). The two sides of the second box surface (502) are respectively engaged with the first support surface (503) and the second support surface (504). The second box surface (502) is provided with first locking blocks (505) on both sides, and the first support surface (503) and the second support surface (504) are provided with first locking slots (506), and the first locking blocks (505) are engaged with the first locking slots (506); A first reinforcing surface (507) and a second reinforcing surface (508) are connected between the first box surface (501) and the second box surface (502). The second box surface (502) can be folded to be laid between the first reinforcing surface (507) and the second reinforcing surface (508). The first support surface (503) and the second support surface (504) are right-angled triangular structures. One right-angled side of the right-angled triangular structure is connected to the first box surface (501), and the other right-angled side is connected to the first connecting surface (509). The two sets of first connecting surfaces (509) can be folded and laid between the second box surface (502) and the first reinforcing surface (507). The first box surface (501), the second box surface (502), the first support surface (503), and the second support surface (504) surround each other to form a triangular prism structure; The third side (403) is engaged with the third support surface (404) and the fourth support surface (405) to form a truncated pyramid structure around the first side (401), the second side (402), the third side (403), the third support surface (404) and the fourth support surface (405). When the lid (500) and the box body (400) are closed, the bottom surface of the triangular prism of the lid (500) coincides with the top surface of the truncated pyramid structure of the box body (400). The outer edge of the top of the inner tray (200) is set higher than the outer edge of the top of the box body (400); The inner tray (200) is located inside the outer box (100); the outer box (100) includes a box body (400) and a box lid (500) connected by a first fold line (300). The side of the inner tray (200) is fitted to the side of the box body (400); It also includes the following: S10. Die-cut the cardboard into the outer box paper and the inner tray paper to be formed according to the pre-designed size and shape; S20. The outer box paper to be formed in step S10 is transferred to the glue application area for gluing: the first support surface (503), the second support surface (504) are folded and glued to the first box surface (501); Fold and bond the third support surface (404), the fourth support surface (405) to the second side surface (402); S30. Fold the outer box paper to be formed by the bonding process in step S20 to obtain the outer box (100): Fold the second box surface (502) and snap the two sides of the second box surface (502) to the first support surface (503) and the second support surface (504) respectively; fold the first side surface (401) to connect the two sides of the first side surface (401) to the third support surface (404) and the fourth support surface (405) respectively; S40. The inner tray paper to be formed in step S10 is conveyed to the glue scraping area for glue application and bonding: the fifth support surface (204), the sixth support surface (205) and the first tray surface (201) are folded and bonded together; S50. Fold the paper of the inner tray (200) to be formed by the bonding process in step S40 to obtain the inner tray (200): Fold the third tray surface (203) to the two sides of the third tray surface (203) and snap it into the fifth support surface (204) and the sixth support surface (205) respectively; S60. Insert the inner tray (200) from step S50 into the inner side of the outer box (100) body (400) described in step S30 to form a box.

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