Packing box with high-bonding-strength pin tooth structure and machining device of high-bonding-strength pin tooth structure

Abstract

The utility model discloses a packaging box with a high-bonding-strength pin tooth structure and a machining device of the structure, and relates to the technical field of packaging boxes. The packaging box comprises a box body, a box cover and a bonding area, a pin tooth structure is arranged on the bonding face of a bonding strip and a rear panel, the pin tooth structure takes the geometric center of the bonding strip in the length direction as a boundary, and pin tooth arrays are arranged on the two sides of the boundary in a mirroring mode respectively, so that it is guaranteed that when the packaging box is subjected to external force in the two opposite directions, the pin tooth arrays are not damaged. The same bonding strength is kept at the two ends of the bonding part; the linear grooves in the pin tooth units are communicated with the arc-shaped grooves in the two ends, and it is guaranteed that the coated adhesive is evenly distributed in the linear grooves and the arc-shaped grooves; the concave-convex embossing structures are arranged on the bottom surfaces of the linear grooves and the arc-shaped grooves, and the rough sand blasting structure layers are arranged on the bevel edges, so that the binding force between the adhesive and the pin tooth units is improved, and the bonding strength of the bonding part is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging box manufacturing, in particular to a packaging box with a high-bonding-strength needle-tooth structure and a processing device for the structure. Background Art

[0002] Product packaging boxes facilitate the subsequent storage, transportation and sale of products. Commonly used product packaging boxes do not have auxiliary bonding structures at the glue ports, which often result in loose glue, seriously affecting product quality. To solve this problem, some packaging box products have redesigned the glue ports, and polished or set needle-tooth structures on the inner surface of the glue bonding surface to increase its friction and adhesion to the glue. Then, adhesive is applied on the inner surface of the glue port to improve the firmness of the glue. During testing, the adhesive strength of the glue ports that have been surface treated or set with needle-tooth structures meets the standards, and after the glue port is torn open, some areas of the paper can even be layered, which can meet product quality requirements.

[0003] In actual applications, there are some problems with the method of polishing the bonding parts. First of all, there are requirements for the material of the packaging box. For paper with longer fibers or new materials, polishing can easily cause large-scale damage to the paper, affecting the bonding strength; and additional polishing equipment and dust removal equipment are required, such as "a device for quickly increasing the roughness of the bonding parts of packaging boxes, application number 2020200182833"; therefore, in related fields, the solution is basically to set a needle-tooth structure on the inner surface of the bonding interface.

[0004] Existing needle tooth structures all use triangular or trapezoidal wire grooves that are connected horizontally as a whole. The bottom and side surfaces of the wire grooves are smooth to accommodate more adhesive. For example, "Application No. 2008201134179, a bonded and fastened cigarette box". While this structure can accommodate more adhesive, it is also difficult to avoid the occurrence of glue explosion in the box. In addition, since the surface of the wire grooves is smooth, the adhesive force is insufficient and debonding may occur.

[0005] In addition, since the needle tooth units in the currently used needle tooth structure are arranged at the same inclination angle, it is easy to apply external force from a direction perpendicular to the wire groove or with a larger angle to the wire groove during inspection. The product quality requirements can be met after bonding; but if external force is applied from a direction parallel to the wire groove or with a smaller angle to the wire groove, it does not meet the requirements; when placed in the use scenario, if the product packaging box is subjected to external forces in multiple directions during transfer and transportation, the packaging box may have quality problems such as local debonding and opening. Summary of the invention

[0006] In order to solve the above problems, the utility model provides a packaging box with a needle-tooth structure with high bonding strength and a processing device for the structure. By optimizing and improving the shape of the entire wire groove and the inner surface of the wire groove in the needle-tooth structure, the adhesion of the needle-tooth structure to the adhesive is improved, thereby improving the bonding strength of the paper box bonding interface. At the same time, different needle-tooth structures are arranged on the same bonding surface to ensure that the bonding surface meets the strength requirements in all directions, and a corresponding processing device is designed for the special needle-tooth structure.

[0007] The utility model adopts the following technical scheme: a packaging box with a high-adhesive-strength needle-tooth structure, comprising a box body, a box cover and an adhesive area, characterized in that the box body comprises a rear panel, a right side panel, a front panel and a left side panel which are sequentially connected from right to left, and also comprises an adhesive strip connected to the left side panel, and a content support plate connected to the adhesive strip; the bottom and bottom ends of the rear panel and the front panel are respectively connected to the cover plate, while the bottom and bottom ends of the right side panel and the left side panel are respectively connected to the sealing plate; each component is bent along a crease line between each other to form a rectangular packaging box with a support plate inside, wherein the adhesive strip is bonded to the corresponding area on the right side of the rear panel, the adhesive strip is inside the packaging box, and the rear panel is outside; in addition, between the adhesive strip and the rear panel A needle-tooth structure is arranged on the bonding surface of the panel, and the geometric center of the needle-tooth structure in the length direction of the bonding strip is used as the dividing line, and needle-tooth arrays are mirror-imaged on both sides of the dividing line; the needle-tooth array on either side includes a plurality of linear needle-tooth units arranged in parallel, and the needle-tooth unit is composed of one or more needle teeth, and the needle teeth include a straight groove in the middle and arc grooves at both ends, and the three parts are connected as a whole; the longitudinal section of the straight groove and the arc groove is an isosceles trapezoid, with the narrower bottom edge arranged at the bottom and the wide side at the top, and the depth of the longitudinal section is 1 / 2 of the overall thickness of the bonding strip; intervals are arranged between adjacent needle-tooth units, and the needle-tooth units in the same needle-tooth array are arranged in the same direction at a certain inclination angle and are evenly distributed in the corresponding area of ​​the bonding surface.

[0008] Preferably, the arc-shaped grooves at both ends of the linear groove are bent inwardly, and the ends of the arc-shaped grooves of two adjacent needle teeth are connected.

[0009] Preferably, the arrangement angle of the linear groove takes the vertical side of the adhesive strip in the packaging box as the starting line, that is, there is an angle between the linear groove and the starting line.

[0010] Preferably, the angle between the straight groove and the starting line is 30°-45°.

[0011] Preferably, the needle tooth units are spaced apart and arranged in parallel, and the arrangement of two adjacent needle tooth units is carried out according to the following structure, that is, the midpoint of the straight groove of the rear needle tooth is aligned with the connecting point of the ends of the arc grooves of the two front needle teeth.

[0012] Preferably, the bottom of the linear groove and the arc groove in the needle tooth unit is an uneven surface with a depression; the depth of the depression is 1 / 3 of the overall depth of the linear groove and the arc groove, which is less than the thickness of the remaining unpenetrated portion of the adhesive strip.

[0013] Preferably, the side surfaces of the straight grooves and the arc grooves in the needle tooth unit, that is, the hypotenuse surfaces of the isosceles trapezoid in longitudinal section, are distributed with rough frosted structures.

[0014] In order to further improve the bonding strength between the adhesive strip and the back of the rear panel, a rough concave-convex surface is provided at the location where the needle tooth array is provided on the adhesive strip, especially at the area between adjacent linear needle tooth units. The maximum depth of the concave-convex surface can be achieved by physical polishing or low-temperature plasma treatment, and is smaller than the depth of the straight groove and arc groove in the needle teeth.

[0015] A processing device for a packaging box with a high-bonding-strength needle-tooth structure comprises a conveying mechanism and a cutting and stamping mechanism, and is characterized in that a die-cutting blade plate is specially provided in the cutting and stamping mechanism, and a die-cutting blade with a needle-tooth array is provided at a position of the die-cutting blade plate corresponding to an adhesive strip in the packaging box, and the arrangement of the die-cutting blade is consistent with the corresponding needle-tooth array; the cutting edge of the die-cutting blade has an isosceles trapezoidal cross-section that is short at the bottom and wide at the top, a sandblasting structure layer is densely distributed on the side of the cutting edge, and an irregular concave-convex embossed structure is provided on the bottom edge surface below the cutting edge.

[0016] The packaging box described in the present application, the needle-tooth arrays arranged relatively on its adhesive strips are determined by simulating the main direction of the external force on the adhesive part when the packaging box is shaken and squeezed by external forces during the moving and transportation process. The distribution direction of the needle-tooth array is determined by the distribution direction of the needle-tooth array when the tensile strength of the adhesive strip is maximum after bonding as the angle between the straight groove described in the present application and the starting line. After testing, it was found that the external force mainly borne by the adhesive part of the square packaging box is basically consistent with the diagonal of the plane where the adhesive part is located, and when the force direction is close to the vertical straight groove, the adhesive part The external force required for tearing the part is the greatest. Therefore, the present application sets the straight groove in the needle-tooth unit to maintain an angle of 30°-45° with the vertical edge of the adhesive strip, that is, the starting line, so that the force direction of the packaging box adhesive strip is close to perpendicular to the needle-tooth unit, thereby exerting its maximum bonding strength; at the same time, taking into account that the directions of the external forces applied to the square packaging box are relative, two symmetrical needle-tooth arrays are set on the adhesive strip along the center line to ensure that when the packaging box is subjected to external forces in two opposite directions, the two ends of the bonding part also maintain the same bonding strength. Beneficial Effects

[0017] The utility model improves the bonding strength of the vertical bonding parts of the square packaging box, which is mainly achieved by the following three means:

[0018] ① Two symmetrical needle tooth arrays are arranged along the center line of the adhesive strip to ensure that when the packaging box is subjected to external forces in two opposite directions, the two ends of the adhesive portion also maintain the same adhesive strength.

[0019] ② Connect the straight groove in the needle tooth unit and the arc grooves at both ends to ensure that the applied adhesive is evenly distributed in the straight groove and the arc groove, maintain the integrity of the distribution, reduce the intervals and breakpoints, so that there are no stress concentration points in the bonding area and the bonding force is evenly distributed.

[0020] ③ The longitudinal cross-sections of the straight groove and the arc groove are set to be isosceles trapezoids, and a concave-convex embossed structure is set on the lower bottom surface, and a rough sandblasted structure layer is set on the bevel. Both effectively improve the bonding force between the adhesive and the needle tooth unit, thereby improving the bonding strength of the bonding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the unfolding of the packaging box described in Example 1.

[0022] Figure 2 yes Figure 1 A is a partial enlarged view of the

[0023] Figure 3 yes Figure 1 A partial enlarged view of B.

[0024] Figure 4 Schematic diagram of the structure of the needle teeth.

[0025] Figure 5 Schematic diagram of the processing of the needle tooth array.

[0026] Figure 6 It is a schematic diagram of the blade of the die-cutting knife.

[0027] Figure 7 It is a schematic diagram of the longitudinal section of the linear groove in the needle tooth unit.

[0028] In the figure: rear panel 1, right side panel 2, front panel 3, left side panel 4, adhesive strip 5, support plate 6, cover plate 7, sealing plate 8, needle tooth array 9, needle tooth unit 10, straight groove 10-1, arc groove 10-2, die cutting knife 11, sandblasting structure layer 11-1, concave and convex embossing 11-2. DETAILED DESCRIPTION

[0029] The following is a further description of a packaging box with a plug tongue having a hidden lock and buckle function in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. The accompanying drawings are all in a very simplified form, using non-precise ratios, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. Example

[0030] like Figure 1-4 As shown, the present embodiment relates to a packaging box of the "X Yuanqing" series of products. The initial glue mouth of the packaging box lacks a glue needle tooth structure. During the production process, the glue is often not firm, and the box explodes and debonds, which seriously affects the product quality. To solve this problem, a glue needle tooth structure of the glue mouth was designed at the beginning. The needle tooth structure is arranged in the same direction. However, after gluing, if the box is torn from one direction, the glue is firm and the paper can be layered, which can meet the product quality requirements. If the box is torn from another direction, the paper cannot be layered, which cannot meet the product quality requirements. The glue needle tooth structure is now re-improved and designed, and the needle teeth are divided into two in the middle to form two symmetrical needle tooth arrangements. In this way, the packaging box with good gluing can achieve firm glue no matter from which direction the box is torn, and tearing the box can make the paper layered, thereby meeting the product quality requirements.

[0031] The packaging box includes a box body, a box cover and an adhesive area. The box body includes a rear panel 1, a right side panel 2, a front panel 3, and a left side panel 4 which are connected in sequence from right to left, and also includes an adhesive strip 5 connected to the left side panel 4, and a support plate 6 connected to the adhesive strip 5 for fixing the internal bottle.

[0032] The bottom and bottom ends of the rear panel 1 and the front panel 3 are connected to the cover plate 7 respectively, while the bottom and bottom ends of the right panel 2 and the left panel 4 are connected to the sealing plate 8 respectively; each component is bent along the crease lines between each other to form a rectangular packaging box with a support plate 6 inside; wherein the adhesive strip 5 is bonded to the corresponding area on the right side of the rear panel 1, the adhesive strip 5 is inside the packaging box, and the rear panel 1 is on the outside; in addition, a needle tooth structure is provided on the bonding surface of the adhesive strip 5 and the rear panel 1, and the needle tooth structure takes the geometric center of the adhesive strip 5 in the length direction as the dividing line, and a needle tooth array 9 is mirror-imaged on both sides of the dividing line; the needle tooth array 9 on either side includes a plurality of linear needle tooth units 10 arranged in parallel, and the needle tooth unit 10 includes three forms, namely, one, two and three needle teeth, a single needle tooth includes a straight line groove 10-1 in the middle and arc grooves 10-2 at both ends, and three parts The straight groove 10-1 is connected as a whole, and the arc grooves 10-2 at both ends of the straight groove 10-1 are bent inward, and the ends of the arc grooves 10-2 of two adjacent needle teeth are connected; the longitudinal sections of the straight groove 10-1 and the arc groove 10-2 are isosceles trapezoids, with the narrower bottom side arranged at the bottom and the wider side at the top, and the depth of the longitudinal section is 1 / 2 of the overall thickness of the adhesive strip 5; there are intervals between adjacent needle tooth units 10, and the needle tooth units 10 in the same needle tooth array 9 are arranged in the same direction at a certain inclination angle and are evenly distributed in the corresponding area of ​​the bonding surface, and the arrangement of two adjacent needle tooth units 10 is carried out according to the following structure, that is, the midpoint of the straight groove 10-1 of the rear needle tooth is aligned with the connecting point of the ends of the arc grooves 10-2 of the two front needle teeth; the setting angle of the straight groove 10-1 takes the vertical edge of the adhesive strip 5 in the packaging box as the starting line, that is, the angle between the straight groove 10-1 and the starting line is 45°.

[0033] The bottom of the straight groove 10-1 and the arc groove 10-2 in the needle tooth unit 10 is a concave uneven surface; the depth of the concave part is 1 / 3 of the overall depth of the straight groove 10-1 and the arc groove 10-2, which is less than the thickness of the remaining unpenetrated part of the adhesive strip 5; the side surfaces of the straight groove 10-1 and the arc groove 10-2 in the needle tooth unit 10, that is, the hypotenuse surface of the isosceles trapezoid in longitudinal section, are distributed with a rough frosted structure.

[0034] refer to Figure 5-7 The processing device of the above-mentioned packaging box includes a cutting and stamping mechanism, and is specially provided with a die-cutting knife plate. A die-cutting knife 11 with a needle tooth array 9 is arranged at a position of the die-cutting knife plate corresponding to the adhesive strip 5 in the packaging box. The arrangement of the die-cutting knife 11 is consistent with the corresponding needle tooth array 9; the cross-section of the cutting edge of the die-cutting knife 11 is an isosceles trapezoid that is short at the bottom and wide at the top, and a sandblasting structure layer 11-1 is densely distributed on the side of the cutting edge, and an irregular concave-convex embossing structure 11-2 structure is arranged on the bottom edge surface below the cutting edge.

[0035] The improved glue needle tooth structure is divided into two in the middle to form two opposing needle tooth arrays. In this way, the glued packaging box can be firmly glued no matter which direction the box is torn from. Tearing the box can make the paper layered, thereby meeting the product quality requirements. Example

[0036] The difference between this embodiment and embodiment 1 is that a rough concave-convex surface is provided at the location where the needle tooth array 9 is provided on the adhesive strip 5, especially at the area between adjacent linear needle tooth units 10, and the maximum depth of the concave-convex surface can be obtained by physical polishing or low-temperature plasma treatment, which is smaller than the depth of the straight groove 10-1 and the arc groove 10-2 in the needle teeth.

Claims

1. A packaging box with a high bonding strength needle-tooth structure, comprising a box body, a box cover and a bonding area, characterized in that: The box body includes a rear panel, a right side panel, a front panel, and a left side panel which are connected in sequence from right to left, and also includes an adhesive strip connected to the left side panel, and a content support plate connected to the adhesive strip; the bottom ends and bottom ends of the rear panel and the front panel are respectively connected to the cover plate, while the bottom ends and bottom ends of the right side panel and the left side panel are respectively connected to the sealing plate; each component is bent along the crease lines between each other to form a rectangular packaging box with a support plate inside, wherein the adhesive strip is bonded to the corresponding area on the right side of the rear panel, the adhesive strip is inside the packaging box, and the rear panel is outside; in addition, a pin-tooth structure is provided on the bonding surface between the adhesive strip and the rear panel, and the pin-tooth structure is connected to the adhesive strip by the adhesive strip. The geometric center in the length direction is the dividing line, and the needle tooth arrays are mirror-set on both sides of the dividing line; the needle tooth array on either side includes a number of linear needle tooth units arranged in parallel, and the needle tooth unit is composed of one or more needle teeth, and the needle teeth include a straight groove in the middle and arc grooves at both ends, and the three parts are connected as a whole; the longitudinal section of the straight groove and the arc groove is an isosceles trapezoid, the narrower bottom edge is set at the bottom, and the wide side is on the top, and the depth of the longitudinal section is 1 / 2 of the overall thickness of the bonding strip; intervals are set between adjacent needle tooth units, and the needle tooth units in the same needle tooth array are arranged in the same direction at a certain inclination angle and are evenly distributed in the corresponding area of ​​the bonding surface.

2. A packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: The arc grooves at both ends of the linear groove are bent inwards, and the ends of the arc grooves of two adjacent needle teeth are connected.

3. The packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: The inclination angle of the linear groove takes the vertical side of the adhesive strip in the packaging box as the starting line, that is, the linear groove is set at an angle relative to the starting line.

4. The packaging box with a high bonding strength needle-tooth structure according to claim 3, characterized in that: The angle between the straight groove and the starting line is 30°-45°.

5. The packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: The needle tooth units are spaced apart and arranged in parallel, and the arrangement of two adjacent needle tooth units is carried out according to the following structure, that is, the midpoint of the linear groove of the rear needle tooth is aligned with the connecting point of the ends of the arc grooves of the two front needle teeth.

6. The packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: The bottom of the linear groove and the arc groove in the needle tooth unit is a concave uneven surface; the depth of the concave part is 1 / 3 of the overall depth of the linear groove and the arc groove, which is less than the thickness of the remaining unpenetrated part of the adhesive strip.

7. The packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: The side surfaces of the straight groove and the arc groove in the needle tooth unit, that is, the hypotenuse surface of the isosceles trapezoid in longitudinal section, are distributed with rough frosted structures.

8. The packaging box with a high bonding strength needle-tooth structure according to claim 5, characterized in that: The side surfaces of the straight groove and the arc groove in the needle tooth unit, that is, the hypotenuse surface of the isosceles trapezoid in longitudinal section, are distributed with rough frosted structures.

9. The packaging box with a high bonding strength needle-tooth structure according to claim 1, characterized in that: A rough concave-convex surface is provided at the part of the adhesive strip where the needle tooth array is provided, especially at the area between adjacent linear needle tooth units, and the maximum depth of the concave-convex surface is smaller than the depth of the linear groove and the arc groove in the needle tooth.

10. A processing device for a packaging box having a high bonding strength needle-tooth structure according to any one of claims 1 to 9, comprising a conveying mechanism and a cutting and stamping mechanism, characterized in that: The cutting and stamping mechanism is specially provided with a die-cutting blade plate, and a die-cutting knife with a needle tooth array is arranged at a position of the die-cutting blade plate corresponding to the adhesive strip in the packaging box, and the arrangement of the die-cutting knife is consistent with the corresponding needle tooth array; the cross-section of the cutting edge of the die-cutting knife is an isosceles trapezoid that is short at the bottom and wide at the top, and a sandblasting structure layer is densely distributed on the side of the cutting edge, and an irregular concave-convex embossed structure is arranged on the bottom edge surface below the cutting edge.

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