Packaging carton formed by glue injection

Abstract

The utility model relates to the technical field of packaging paper boxes, and discloses a packaging paper box formed by glue injection, which comprises an upper box body and a lower box body, the upper box body is movably buckled on the lower box body, and the upper box body comprises an upper box top plate and upper box side plates connected with the periphery of the upper box top plate. The lower box body comprises a lower box bottom plate and lower box side plates connected with the periphery of the lower box bottom plate. Glue injection layers are arranged between every two adjacent upper box side plates and between every two adjacent lower box side plates. The paper box is formed by splicing the hollow paperboards after being cut, glue injection molding is directly conducted through a mold, surface paper is not needed, raw materials and working procedures are saved, cost is greatly reduced, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing carton technical field, concretely is a kind of packing carton of glue injection forming. BACKGROUND

[0002] In the existing top and bottom carton manufacturing process, first, when the side plate of the carton is connected, the side plate is formed by folding the paperboard, and the connection between the side plates is connected by the plug-in tongue plug-in mode, and more paper is used. Secondly, when the four side plates are wrapped, the face paper is longer than the height of the side plate, and the gray plate is wrapped from the outside to the inside, so that the gray plate is not exposed, and the area of the face paper wrapped inside the box is about 80% of the total area of the four side plates. Therefore, the current top and bottom carton process can cause waste of face paper.

[0003] Another manufacturing method is to splice the paperboard into a carton, without pasting the four vertical edges, and then wrap the outside with face paper, which is folded and pasted inside. The above process can be automatically produced by equipment, but it also needs to add face paper, and the process is complex, which also causes waste of face paper.

[0004] Therefore, it is urgent to develop a packaging carton with simple processing process and saving face paper. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and to provide a packaging carton formed by glue injection, which can save face paper and effectively solve the problems in the background art by connecting each side plate with a glue injection layer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a packaging carton formed by glue injection, comprising an upper box body and a lower box body, the upper box body is movably buckled on the lower box body, the upper box body comprises an upper box top plate and an upper box side plate connected around the upper box top plate, the lower box body comprises a lower box bottom plate and a lower box side plate connected around the lower box bottom plate, and an injection layer is arranged between two adjacent upper box side plates and two adjacent lower box side plates.

[0007] Further, the upper box body and the lower box body are both prepared by cutting a plurality of layers of hollow paperboard.

[0008] Further, the injection layer uses an adhesive that is an environmentally friendly hot melt adhesive, which has high adhesive strength, fast curing and good thermal stability, and has excellent weather resistance and adhesion.

[0009] Further, the cutting edges of the bottom of the upper box side plate and the top of the lower box side plate are both wavy.

[0010] The bottom of the upper box side panel and the top of the lower box side panel are cut into wavy edges using a cutting tool. This has the advantage that, because the cardboard is hollow, it is difficult to precisely align the heights of each layer of the multi-layer cardboard after slotting. When the two vertical edges of the carton are joined, if both sides are straight, the misalignment will be visually obvious and affect the appearance. However, the wavy edges can negligibly reduce the height difference, without affecting the appearance.

[0011] Furthermore, the glue injection layer is formed by glue pouring or glue injection.

[0012] Furthermore, the glue injection layer is formed by injecting glue with a glue injection needle. The glue injection molding method is: the inner and outer corners of the two adjacent side panels that need to be bonded are fixed with an inner right-angle mold and an outer right-angle mold respectively, and an empty groove for glue injection is formed in the middle. Environmentally friendly hot melt glue is injected with a glue injection needle, and a paper box is directly formed after bonding.

[0013] Furthermore, both sides of the upper box side panel and the lower box side panel are provided with chamfers, that is, a gap of 2-3 mm is provided between two adjacent upper box side panels and two adjacent lower box side panels, so that a gap for glue injection is left at the angle to facilitate glue injection.

[0014] Furthermore, V-shaped grooves are provided between the inner side of the upper box top plate and the inner side of the upper box side plate, and between the inner side of the lower box bottom plate and the inner side of the lower box side plate.

[0015] The hollow paperboard of the utility model adopts food grade material and can be applied to various colors.

[0016] Furthermore, the surface of the paper box of the utility model can be spray-printed with patterns of various colors or shapes.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The paper box of the utility model is made by cutting and splicing hollow paperboards into a paper box, and is directly formed by injecting glue into a mold, without the need for face paper, saving raw materials and working procedures, greatly reducing costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model;

[0020] Figure 2 This is a schematic diagram of the lower box body of the utility model;

[0021] Figure 3 This is a schematic diagram of the unfolded structure of the lower box;

[0022] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0023] Figure 5This is a schematic diagram of the structure of the glue injection mold and the glue injection method of the utility model;

[0024] In the figure: 1 upper box body, 11 upper box top plate, 12 upper box side plate, 2 lower box body, 21 lower box bottom plate, 22 lower box side plate, 3 outer right-angle mold, 4 inner right-angle mold, 5 glue injection layer, 6 V-shaped groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1, see Figure 1-3 and Figure 5 The utility model provides a packaging paper box formed by injection molding, including an upper box body 1 and a lower box body 2. The upper box body 1 is movably buckled on the lower box body 2. The upper box body 1 includes an upper box top plate 11 and an upper box side plate 12 connected around the upper box top plate 11. The lower box body 2 includes a lower box bottom plate 21 and a lower box side plate 22 connected around the lower box bottom plate 21. A glue injection layer 5 is provided between two adjacent upper box side plates 12 and between two adjacent lower box side plates 22.

[0027] The upper box body 1 and the lower box body 2 are both made by cutting multiple layers of hollow cardboard.

[0028] The adhesive used in the glue injection layer 5 is an environmentally friendly hot melt adhesive, which has high bonding strength, fast curing, good thermal stability, and excellent weather resistance and adhesion.

[0029] The cutting edges at the bottom of the upper box side panel 12 and the top of the lower box side panel 22 are both wavy.

[0030] The bottom of the upper box side panel 12 and the top of the lower box side panel 22 are cut into wavy edges using the shape of the cutting tool. The advantage is that because the cardboard is hollow, it is difficult to accurately align the height of each layer of the multi-layer cardboard after slotting. When the two vertical edges of the cardboard box are spliced ​​together, if both sides are straight, if they are misaligned, it will be visually obvious and affect the appearance. However, the wavy edges can ignore the slight height difference and do not affect the appearance.

[0031] The glue injection layer 5 is formed by glue pouring or glue injection.

[0032] The glue injection layer 5 is formed by injecting glue with a glue injection needle. The glue injection molding method is: the inner and outer corners of the two adjacent side panels to be bonded are fixed with an inner right-angle mold 4 and an outer right-angle mold 3 respectively, and an empty groove to be injected with glue is formed in the middle. Environmentally friendly hot melt glue is injected with a glue injection needle, and a paper box is directly formed after bonding.

[0033] Both sides of the upper box side panel 12 and the lower box side panel 22 are provided with chamfers, that is, a gap of 2-3 mm is provided between two adjacent upper box side panels 12 and two lower box side panels 22, so that there is a gap for glue injection at the angle to facilitate glue injection.

[0034] V-shaped grooves 6 are provided between the inner sides of the upper box top plate 11 and the upper box side plates 12 , and between the inner sides of the lower box bottom plate 21 and the lower box side plates 22 .

[0035] This utility model adopts food grade material and is available in various colors.

[0036] The outer surface of the paper box of the utility model can be spray-printed with graphics and patterns of various colors or shapes. Example

[0037] See Figure 2-5 The difference between the second embodiment and the first embodiment is that the upper box body 1 is movably buckled on the lower box body 2 and completely wraps the lower box body 2.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic injection molding packaging carton, characterized by: The utility model comprises an upper box body and a lower box body, wherein the upper box body is movably buckled on the lower box body, the upper box body comprises an upper box top plate and upper box side plates connected around the upper box top plate, and the lower box body comprises a lower box bottom plate and lower box side plates connected around the lower box bottom plate, and a glue injection layer is provided between two adjacent upper box side plates and between two adjacent lower box side plates.

2. The injection molded packaging paper box according to claim 1, characterized in that: The upper box body and the lower box body are both made by cutting multiple layers of hollow cardboard.

3. The injection molded packaging paper box according to claim 1, characterized in that: The adhesive used in the glue injection layer is environmentally friendly hot melt adhesive.

4. The injection molded packaging paper box according to claim 2, characterized in that: The cutting edges of the bottom of the upper box side panel and the top of the lower box side panel are both wavy.

5. The injection molded packaging paper box according to claim 2, characterized in that: Both sides of the upper box side plate and the lower box side plate are provided with chamfers.

6. The injection molded packaging paper box according to claim 1, characterized in that: V-shaped grooves are provided between the inner side of the upper box top plate and the inner side of the upper box side plate, and between the inner side of the lower box bottom plate and the inner side of the lower box side plate.

7. The injection molded packaging paper box according to claim 1, characterized in that: The glue injection layer is formed by glue injection or glue pouring.

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