Double-layer packing box lining, inner box and packing box

Abstract

The double-layer packaging box lining comprises an outer frame and at least one inner frame, each inner frame comprises at least n first side walls, n is larger than or equal to 3, all the first side walls jointly define an inner space of the inner frame and form an upper side opening of a polygonal structure of the inner frame, the upper edge of each first side wall is connected with an outwards-turned side wing, and the side wings are connected with the outer frame. The outer frame is formed by folding a strip-shaped blank plate, transverse prefabricated creases are sequentially arranged on the strip-shaped blank plate in the longitudinal direction, a first fin and a second fin are arranged on the two sides of each main body part respectively, the paperboard is folded according to the creases, and the outer frame in the shape of an n-polygon cover is defined by at least n main body parts; the inner frame is sleeved with the outer frame, the outwards-turned side wings of the inner frame are bonded with the first fins of the outer frame one by one, and the double-layer packaging box lining is formed. As the strip-shaped blank plates of the outer frame are regular in shape, more unit raw materials can be divided, and the cost of the raw materials is saved; and the forming process is simpler and high in stability.

Description

Technical Field

[0001] This utility model relates to a packaging box, and more particularly to a double-layer packaging box liner, inner box, and packaging box. Background Technology

[0002] To create a more layered and visually appealing packaging box while providing cushioning to protect the contents from impact, an inner lining is often required. However, existing inner linings are typically thin and lack sufficient support, and the manufacturing process for these boxes is quite complex.

[0003] In its invention patent application No. 202411318731.0, the inventor disclosed a packaging box liner and cardboard box, etc., in which a relatively stable packaging box liner with a double-layer isolation effect was designed by bonding inner and outer frames together. However, through further development and design, the inventor discovered that the outer frame of the liner extends from the central part to the surrounding parts, making the cardboard manufacturing of the outer frame more complex. Furthermore, the outer frame requires bonding adjacent surrounding parts during the forming process, which is cumbersome. Additionally, the bottom of the outer frame and inner frame lacks further bonding structure during the bonding process, resulting in insufficient stability. Therefore, the inventor further designed this patent. Utility Model Content

[0004] The purpose of this utility model is to provide a double-layer packaging box liner, inner box, and packaging box that are easy to manufacture from raw material sheets and have a simpler and more stable molding process.

[0005] To solve this technical problem, this utility model provides a double-layer packaging box liner, including an outer frame and at least one inner frame. The inner frame includes at least n first sidewalls, where n≥3. Each first sidewall together encloses the internal space of the inner frame and forms the upper opening of the polygonal structure of the inner frame. Each of the first sidewalls has an outwardly folded wing connected to its upper edge. The outer frame is formed by folding a strip of blank. The strip of blank has at least n-1 transverse pre-made creases in the longitudinal direction, dividing it into at least n main parts. Each main part has a first wing on the same side. The cardboard is folded along the creases, and at least n main parts form an nnian dome-shaped outer frame. The outer frame is fitted over the inner frame, and the outwardly folded wing of the inner frame is bonded to each of the first wing of the outer frame to form a double-layer packaging box liner.

[0006] Furthermore, the side wing has a "Z" shaped structure, including a first folded edge, a second folded edge, and a third folded edge arranged sequentially. The first folded edge is integrally connected to the upper edge of the first sidewall, and the third folded edge is located below the first folded edge. The upper and lower edges of the second folded edge are integrally connected to the first folded edge and the third folded edge, respectively. The upper side of each third folded edge is bonded to the lower side of each first fin of the outer frame, and each first folded edge protrudes from the edge of each first fin.

[0007] Furthermore, the first and third folds of the side wings are perpendicular to the first sidewall, the thickness of the first fin of the outer frame is the same as the thickness of the second fold, and after forming, the upper side of the first fin is flush with the upper side of the first fold.

[0008] When n is 4, the lining is square, which is the most commonly used box shape.

[0009] Furthermore, after the strip blank is folded along the creases, the outer wall and / or inner wall of the two main parts connected end to end are fixedly connected by adhesive tape.

[0010] Furthermore, each of the main body portions is provided with a second fin on the opposite side of the first fin. ←

[0011] Furthermore, the inner frame is a box with an open upper side and also includes a first bottom wall. The first bottom wall is a polygonal structure with the same number of sides as the open upper side of the inner frame. Each side of the first bottom wall has a corresponding first side wall integrally connected to it. The inner and / or outer sides of two adjacent first side walls are fixedly connected by adhesive tape. The second fins P are all wider than the corresponding first fins P. The lower side of the first bottom wall is bonded to the upper side of the second fins P of each main body part P.

[0012] A packaging box inner box includes a bottom plate, which is bonded to the bottom of the aforementioned double-layer packaging box liner.

[0013] A packaging box includes an outer box and the aforementioned double-layered inner liner or inner box, wherein the inner liner or inner box is disposed inside the outer box.

[0014] This patent, through the rational design of the strip blanks of the outer frame, because the strip shape is relatively flat, allows for the division of a larger number of outer frame strip blanks from a unit of raw material, thus better saving raw material costs.

[0015] Furthermore, the pre-fabricated crease design of the strip blank makes the outer frame forming process simpler. It is only necessary to fold the main parts of the strip blank in sequence and fix the first and last main parts with tape to achieve the outer frame forming.

[0016] In addition, the design of the first and second fins ensures that the upper and lower surfaces of the outer frame and the inner frame can be stably bonded; it can also be further bonded to the base plate, greatly increasing the mechanical stability of the lining and inner box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a strip-shaped blank (P2) according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the outer frame of Embodiment 1 of the present utility model;

[0019] Figure 3 This is a schematic diagram of the first blank plate (P1) in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the inner frame of Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of the assembly process of the outer frame and inner frame in Embodiment 1 of this utility model;

[0022] Figure 6 This is a schematic diagram of the outer frame and inner frame after assembly according to Embodiment 1 of this utility model;

[0023] Figure 7 for Figure 6 Partial cross-sectional diagram;

[0024] Figure 8 , 9 This utility model embodiment 1 shows an assembly diagram of the outer frame, inner frame, and base plate;

[0025] Figure 10 This is a schematic diagram of the strip-shaped blank (P2') in Embodiment 2 of this utility model;

[0026] Figure 11 This is a schematic diagram of the first blank (P1') in Embodiment 2 of this utility model. Detailed Implementation Example 1

[0027] like Figure 1-9 As shown, a double-layered packaging box liner includes an outer frame 2 and at least one inner frame 1. The inner frame 1 includes four first sidewalls 12, each first sidewall 12 collectively enclosing the internal space of the inner frame 1 and forming an upper opening of the polygonal structure of the inner frame 1. Each of the first sidewalls 12 has an outwardly flared wing 13 connected to its upper edge. Figure 4 As shown;

[0028] like Figure 2As shown, the outer frame 2 is formed by folding a strip of blank P2. The strip of blank P2 has three transverse pre-fabricated creases M31 arranged longitudinally, dividing it into four main parts P22. Each main part P22 has a first fin P221 and a second fin P222 on both sides. The cardboard P2 is folded along the creases M31, and the main parts P22 connected end-to-end are fixed together on their inner and outer walls by tape 23, forming a quadrilateral dome-shaped outer frame 2. Figure 5 As shown, the outer frame 2 is fitted over the inner frame 1, and the outward-folding side wings of the inner frame 1 are bonded to each of the first fins P221 of the outer frame 2 to form a double-layer packaging box liner.

[0029] The inner frame 1 is composed of, as follows Figure 3 The first blank plate P1 shown is folded into Figure 4 The inner frame 1 shown can be made of 350g white cardboard, cut into a "+" shape, including a central part P11 and four surrounding parts P12. A crease M1 is pre-formed between the central part P11 and each of the surrounding parts P12, and three creases M2 are pre-formed on each of the surrounding parts P12. The first blank P1 can be folded according to creases M1 and M2. Figure 4 The inner frame 1 shown is a box with an open top. The central part P11 forms a first bottom wall 11. In this embodiment, each side of the first bottom wall 11 is integrally connected to a first side wall 12. The outer sides of every two adjacent first side walls 12 are fixedly connected by tape 14.

[0030] The side wing 13 has a "Z" shaped structure, including a first folded edge 131, a second folded edge 132, and a third folded edge 133 arranged sequentially. The first folded edge 131 is integrally connected to the upper edge of the first side wall 12. The third folded edge 133 is located below the first folded edge 131. The upper and lower edges of the second folded edge 132 are integrally connected to the first folded edge 131 and the third folded edge 133, respectively. The upper side of each third folded edge 133 is bonded to the lower side of each first fin P221 of the outer frame 2, and each first folded edge 131 protrudes from the edge of each first fin P221.

[0031] The first fold 131 and the third fold 133 of the side wing 13 are perpendicular to the first sidewall 12. The thickness of the first fin P221 of the outer frame 2 is the same as the thickness of the second fold 132. After molding, the upper side of the first fin P221 is flush with the upper side of the first fold 131. In some other embodiments, the bottom line of the second fold 132 can also be designed to be close to the first sidewall 12 of the inner frame, forming a triangular cavity that can be filled with glue 134 to form a stable structure, such as... Figure 7 As shown.

[0032] The paperboard used for the first blank P1 has a smaller basis weight than the paperboard used for the strip blank P2. Therefore, the outer frame 2 has a larger basis weight, which is beneficial for forming a stable mechanical model after being fitted together.

[0033] In this embodiment, the second fins P222 are all wider than the corresponding first fins P221, so that the lower side of the first bottom wall 11 can be bonded to the upper side of the portion of the second fins P222 of each main body part P22 that is wider than the first fins P221.

[0034] There is another base plate 3, such as Figure 8 As shown, the upper (inner) side of the second fin P222 of the outer frame 2 is glued to the bottom of the inner frame 1 one by one, and then the base plate 3 is glued to the bottom of the double-layer packaging box lining, thus forming... Figure 9 The inner box shown is stronger and more stable.

[0035] In some embodiments, an outer box is also included, wherein the aforementioned inner liner or inner box is disposed inside the outer box. Example 2

[0036] like Figure 10 , 11 As shown, in other embodiments, the inner frame can be designed as a packaging box liner with different numbers of sides, and the inner frame includes five first sidewalls, each of which has an outwardly folded side wing 13' connected to its upper edge.

[0037] The inner frame is made of 350g white cardstock, cut into pieces. Figure 11 The first blank plate P1' shown is folded into a shape including a central part P11' and five surrounding parts P12' arranged around the central part P11'. A crease M1' is pre-made between the central part P11' and the surrounding parts P12', and three creases M2' are pre-made on the surrounding parts P12'. The first blank plate P1' can be folded into a pentagonal inner frame according to the creases M1' and M2'.

[0038] like Figure 10 Therefore, the outer frame is formed by folding a strip blank P2'. The strip blank P2' has four transverse pre-made creases M31 in the longitudinal direction, which divide it into five main parts P22. Each main part P22 has a first fin P221 and a second fin P222 on both sides. The strip blank P2' is folded along the creases M31. The main parts P22 connected end to end are fixedly connected by tape to form a pentagonal cover-shaped outer frame. The outer frame is fitted over the inner frame. The outward folding wings of the inner frame are glued to each of the first fins P221 of the outer frame 2 to form a double-layer packaging box liner.

[0039] In this embodiment, the second fins P222 are all wider than the corresponding first fins P221, so that the lower side of the first bottom wall 11 can be bonded to the upper side of the portion of the second fins P222 of each main body part P22 that is wider than the first fins P221.

Claims

1. A double-layered packaging box liner, comprising an outer frame (2) and at least one inner frame (1), the inner frame (1) comprising at least n first sidewalls (12), wherein n≥3, each first sidewall (12) together enclosing the internal space of the inner frame (1) and forming an upper opening of a polygonal structure of the inner frame (1), each of the first sidewalls (12) having an outwardly flared wing (13) connected to its upper edge, characterized in that: The outer frame (2) is formed by folding a strip blank (P2, P2'). The strip blank (P2, P2') is longitudinally provided with at least n-1 transverse prefabricated creases (M31) to divide it into at least n main parts (P22). Each main part (P22) is provided with a first fin (P221) on the same side. The strip blank (P2) is folded according to the creases (M31) to form an outer frame (2) in the shape of an n-sided cover. The outer frame is fitted over the inner frame. The outwardly folded side wings (13) of the inner frame are bonded to each of the first fins (P221) of the outer frame (2) to form a double-layer packaging box liner.

2. The double-layer packaging box liner as described in claim 1, characterized in that: The side wing (13) has a "Z" shaped structure, including a first fold (131), a second fold (132) and a third fold (133) arranged in sequence. The first fold (131) is integrally connected to the upper edge of the first sidewall (12). The third fold (133) is located below the first fold (131). The upper and lower edges of the second fold (132) are integrally connected to the first fold (131) and the third fold (133) respectively. The upper side of each third fold (133) is bonded to the lower side of each first fin (P221) of the outer frame (2). Each first fold (131) protrudes from the edge of each first fin (P221).

3. The double-layer packaging box liner as described in claim 2, characterized in that: The first fold (131) and the third fold (133) of the side wing (13) are perpendicular to the first side wall (12). The thickness of the first fin (P221) of the outer frame (2) is the same as the thickness of the second fold (132). After forming, the upper side of the first fin (P221) is flush with the upper side of the first fold (131).

4. The double-layer packaging box liner as described in claim 1, characterized in that: The value of n is 4.

5. A double-layer packaging box liner as described in claim 1, characterized in that: After the strip blanks (P2, P2') are folded along the crease M31, the two main parts (P22) connected end to end are fixedly connected by tape (23) on their outer wall side and / or inner wall side.

6. A double-layer packaging box liner as described in claim 1, characterized in that: The inner frame (1) is made of a first blank board, the first blank board being made of paperboard with a basis weight less than or equal to that of the outer frame strip blank board (P2, P2').

7. A double-layer packaging box liner as described in any one of claims 1 to 6, characterized in that: Each of the main body parts (P22) is provided with a second fin (P222) on the other side opposite to the first fin (P221).

8. The double-layer packaging box liner as described in claim 7, characterized in that: The inner frame (1) is a box with an open top and also includes a first bottom wall (11). The first bottom wall (11) is a polygonal structure with the same number of sides as the open top of the inner frame (1). Each side of the first bottom wall (11) has a corresponding first side wall (12) integrally connected to it. The inner and / or outer sides of two adjacent first side walls (12) are fixedly connected by tape. The second fins (P222) are all wider than the corresponding first fins (P221). The lower side of the first bottom wall (11) is bonded to the upper side of the second fins (P222) of each main body part (P22).

9. An inner box for a packaging box, characterized in that: It includes a base plate (3) and a double-layer packaging box liner as described in claim 8, wherein the base plate (3) is bonded to the bottom of the double-layer packaging box liner.

10. A packaging box, comprising an outer box, characterized in that: It also includes a double-layered packaging box liner as described in any one of claims 1 to 8 or a packaging box inner box as described in claim 9, wherein the packaging box liner or packaging box inner box is disposed inside the outer box.

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