Package creasing machine, creasing cutting die and packaging material

Abstract

The invention provides a packaging creasing machine, a creasing cutting die and a packaging material. A pressing face of the indentation cutting die comprises a first pressing face, a second pressing face and a transition connecting face, a height difference exists between the first pressing face and the second pressing face, and the transition connecting face is connected between the first pressing face and the second pressing face. The first pressing face is provided with a plurality of pressing protruding edges which converge and extend towards a preset area, the second pressing face is arranged corresponding to the preset area, and the indentation depth, generated by the second pressing face, on a packaging material in the preset area is smaller than the indentation depth, generated by the first pressing face, on the packaging material. According to the indentation cutting die in the embodiment, the situation that in the packaging material forming process, due to stress concentration of indentation intersection points (or dense areas), paperboards are broken or even broken is avoided, the product quality and the production efficiency can be remarkably improved, and then the packaging quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of packaging equipment, and in particular to a packaging creasing machine, a creasing die and packaging materials. Background Art

[0002] In the field of paper aluminum plastic aseptic packaging processing, the creasing machine is an important device used to process creasing lines on the base paper for folding. However, the traditional creasing line design will cause certain problems in the packaging material forming process, especially the problem of packaging material breaking. When multiple creasing lines of equal depth and width converge at one point, the concentrated stress will directly cause the cardboard surface at this point to break during the packaging material forming process, and in severe cases, it may even cause the base paper to completely split. Please refer to Figure 1 , Figure 1 This is a schematic diagram of the indentation lines of packaging materials obtained in a conventional technical solution, where multiple indentation lines converge at point Q, which generates concentrated stress during the packaging material forming process, causing the base paper to break or even rupture. In the figure, the solid line A represents the front indentation, and the dotted line B represents the back indentation. Summary of the invention

[0003] In a first aspect of an embodiment of the present application, there is provided a creasing die for a packaging creasing machine, wherein the creasing surface of the creasing die comprises a first creasing surface, a second creasing surface and a transition connection surface, wherein a height difference is arranged between the first creasing surface and the second creasing surface, wherein the transition connection surface is connected between the first creasing surface and the second creasing surface, wherein the first creasing surface is provided with a plurality of creasing ridges converging and extending toward a preset area, wherein the second creasing surface is arranged corresponding to the preset area, and wherein the indentation depth that the second creasing surface can produce on the packaging material within the preset area is smaller than the indentation depth that the first creasing surface can produce on the packaging material.

[0004] In some embodiments, the height difference between the first pressing surface and the second pressing surface is 0.1 mm to 0.3 mm.

[0005] In some embodiments, a projection length of the second pressing surface on the plane of the packaging material is 2 mm to 10 mm.

[0006] In some embodiments, when sterile packaging materials with a content volume ≤500ml are produced, the projection length of the second pressing surface on the plane of the packaging material is 2mm to 5mm; when sterile packaging materials with a content volume ≥500ml and ≤2000ml are produced, the projection length of the second pressing surface on the plane of the packaging material is 4mm to 7mm; when sterile packaging materials with a content volume ≥2000ml are produced, the projection length of the second pressing surface on the plane of the packaging material is 6mm to 10mm.

[0007] In some embodiments, a projection length of the transition connection surface on the plane of the packaging material is 3 mm to 10 mm.

[0008] In some embodiments, when sterile packaging materials with a content volume ≤500ml are produced, the projection length of the transition connection surface on the plane of the packaging material is 3mm to 5mm; when sterile packaging materials with a content volume ≥500ml and ≤2000ml are produced, the projection length of the transition connection surface on the plane of the packaging material is 4mm to 7mm; when sterile packaging materials with a content volume ≥2000ml are produced, the projection length of the transition connection surface on the plane of the packaging material is 6mm to 10mm.

[0009] In a second aspect, an embodiment of the present application provides a packaging creasing machine, which includes the creasing knife die described in any one of the above embodiments.

[0010] In some embodiments, the packaging creasing machine includes a plurality of creasing knife dies of different sizes to meet different packaging material production requirements.

[0011] In some embodiments, the packaging creasing machine includes an upper mold and a lower mold, and the upper mold and the lower mold are used to respectively indent opposite sides of the packaging material, wherein at least one of the upper mold and the lower mold is the creasing knife mold described in the above embodiment.

[0012] In a third aspect, an embodiment of the present application provides a packaging material, wherein an indentation is formed on the packaging material using the packaging indentation machine described in any one of the above embodiments.

[0013] The creasing knife die for a packaging creasing machine provided in the embodiment of the present application can make the indentation depth in the intersection area of ​​the indentation lines smaller than the indentation depth in other areas by designing a first pressing surface and a second pressing surface with a height difference, and transitionally connecting the first pressing surface and the second pressing surface through a transition connection surface, so that the stress concentration at the intersection point (or dense area) of the indentation during the forming process of the packaging material can be avoided, which causes the cardboard to break or even rupture, and can significantly improve product quality and production efficiency, thereby improving packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1It is a schematic diagram of the indentation line of a packaging material obtained in a conventional technical solution;

[0016] Figure 2 This is a schematic diagram of the partial structure of the front creasing of a packaging creasing machine according to an embodiment of the present application;

[0017] Figure 3 yes Figure 2 A schematic structural diagram of the upper mold in the embodiment;

[0018] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point D in the embodiment;

[0019] Figure 5 yes Figure 4 Schematic diagram of the structural section at CC in the middle;

[0020] Figure 6 is to use Figure 2 A schematic diagram of the structure in which the upper mold and the lower mold structure are pressed together to form an indentation line in the embodiment;

[0021] Figure 7 It is a partial structural schematic diagram of another embodiment of the indentation die of the present application. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0023] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] This application embodiment provides a packaging creasing machine, see Figure 2 , Figure 2 It is a schematic diagram of the partial structure of the front creasing of an embodiment of the packaging creasing machine of the present application, wherein the packaging creasing machine 10 includes an upper mold 100 and a lower mold 200, and the upper mold 100 and the lower mold 200 can be respectively used to crease and emboss the opposite sides of the packaging material 300. In addition, the packaging creasing machine 10 can also include a driving device for driving the upper mold 100 and the lower mold 200 and a conveying device for transmitting the packaging material 300, etc. The detailed features of this part are within the scope of understanding of those skilled in the art and will not be repeated here. Among them, the structure of the upper mold 100 is mainly introduced in this embodiment. The packaging material 300 in the embodiment of the present application is not limited to paper aluminum plastic aseptic packaging cardboard, but can also be other packaging materials, such as tin foil, aluminum cardboard, etc., which are not specifically limited here.

[0026] Please also read Figures 3 to 5 , Figure 3 yes Figure 2 The structural diagram of the upper mold in the embodiment, Figure 4 yes Figure 3A partial enlarged schematic diagram of point D in the embodiment, Figure 5 yes Figure 4 The schematic cross-sectional view of the structure at CC in the middle. It should be noted that the upper mold 100 in this embodiment is also the indentation die, and the lower mold 200 can play a supporting, supporting and matching function during the pressing process of the upper mold 100. Its shape can be a matching structure with a groove. The detailed features of this part are within the understanding of those skilled in the art and will not be repeated here. In addition, in some other embodiments, the lower mold 200 can also be a structural form of an indentation die, and the upper mold 100 cooperates with it, or in some embodiments, both the upper mold 100 and the lower mold 200 can adopt the structural form of an indentation die, which is not specifically limited here. Among them, the indentation die in this embodiment (taking the above mold as an example) includes a pressing surface 110, and the pressing surface 110 can specifically include a first pressing surface 111, a second pressing surface 112 and a transition connection surface 113. There is a height difference h between the first pressing surface 111 and the second pressing surface 112, and the transition connection surface 113 is connected between the first pressing surface 111 and the second pressing surface 112.

[0027] Please also read Figure 6 , Figure 6 is to use Figure 2 A schematic diagram of the structure of the upper mold and the lower mold structure pressed together to form an indentation line in the embodiment, wherein the solid line A in the figure represents the front indentation (i.e., the indentation line formed by pressing the upper mold 100 from the printed surface of the packaging material (such as paperboard) to the back surface of the paperboard), the dotted line B represents the back indentation (i.e., the indentation line formed by pressing the upper mold of another set of indentation molds from the back surface of the paperboard to the printed surface of the paperboard), and K represents the position of the outer frame of the upper mold 100.

[0028] Please continue reading Figure 3 and Figure 4 The first pressing surface 111 is provided with a plurality of pressing ridges 1111 converging and extending toward the preset area X, that is, Figure 6 The area marked by X in the figure is not limited to a circle, a semicircle, etc., and can be any shape. In the position of the preset area X, multiple indentation lines can converge or intersect, that is, the indentation lines in the preset area X are relatively dense, which is prone to stress concentration.

[0029] During the pressing process, the second pressing surface 112 corresponds to the preset area X, and the depth of the indentation that the second pressing surface 112 can produce on the packaging material 300 in the preset area X is less than the depth of the indentation that the first pressing surface 111 can produce on the packaging material 300. During the mechanical indentation process, the depth of the indentation formed on the packaging material 300 by the second pressing surface 112 is lower than the depth of the indentation formed on the packaging material 300 by the first pressing surface 111, that is, the depth of the indentation near the convergence point P of the indentation line is reduced, and the concentrated stress at P is relieved, thereby avoiding the phenomenon of skin breakage and rupture of the packaging material 300 during the indentation forming process. Since a transition connection surface 113 is provided between the first pressing surface 111 and the second pressing surface 112, the depth of the indentation in the preset area X near the convergence point P is gradual.

[0030] Optionally, see Figure 5 The first pressing surface 111, the second pressing surface 112 and the transition connection surface 113 can all be straight surfaces, wherein the first pressing surface 111 and the second pressing surface 112 can be arranged in parallel, and the height difference between the first pressing surface 111 and the second pressing surface 113 is 0.1mm to 0.3mm, specifically 0.1mm, 0.11mm, 0.13mm, 0.18mm, 0.2mm, 0.22mm, 0.25mm, 0.3mm and the like, and can be adjusted according to different packaging requirements.

[0031] Among them, the projection length a of the second pressing surface 112 on the plane of the packaging material 300 is 2mm to 10mm, and specifically can be 2mm, 2.5mm, 2.8mm, 3.3mm, 4.5mm, 6mm, 8mm, 8.3mm, 9mm, 10mm and the like. The setting can be adjusted according to different packaging requirements. For example, when producing sterile packaging materials with a content volume ≤500ml, the projection length a of the second pressing surface 112 on the plane of the packaging material can be 2mm to 5mm; when producing sterile packaging materials with a content volume ≥500ml and ≤2000ml, the projection length a of the second pressing surface 112 on the plane of the packaging material 300 can be 4mm to 7mm; when producing sterile packaging materials with a content volume ≥2000ml, the projection length a of the second pressing surface 112 on the plane of the packaging material 300 can be 6mm to 10mm.

[0032] The projection length b of the transition surface 113 on the plane of the packaging material 300 can be 3mm to 10mm, specifically 3mm, 3.5mm, 3.8mm, 4.3mm, 5.5mm, 6mm, 8mm, 8.3mm, 9mm, 10mm, etc., and can be adjusted according to different packaging requirements. For example, when producing aseptic packaging materials with a content of ≤500ml, the projection length b of the transition surface 113 on the plane of the packaging material 300 can be 3mm to 5mm; when producing aseptic packaging materials with a content of ≥500ml and ≤2000ml, the projection length b of the transition surface 113 on the plane of the packaging material 300 can be 4mm to 7mm; when producing aseptic packaging materials with a content of ≥2000ml, the projection length b of the transition surface 113 on the plane of the packaging material 300 can be 6mm to 10mm. The first pressing surface 111 is a large pressing surface, so its size does not need to be specifically limited.

[0033] The structure of the indentation die (taking the above die as an example) in the embodiment of the present application is not limited to the position where the stress concentration area is located at the edge of the indentation line, but can also be the preset area X (i.e., the stress concentration area) located in the middle of the die, see Figure 7 , Figure 7 It is a schematic diagram of the partial structure of another embodiment of the embossing die of the present application. In this embodiment, the second pressing surface 112 may be located in the middle, and the transition connection surface 113 and the first pressing surface 111 are arranged around the second pressing surface 112.

[0034] It should be noted that the packaging creasing machine in the embodiment of the present application may include a plurality of creasing knife dies (upper die and lower die) of different sizes to meet different packaging material production requirements. In addition, in some other embodiments, the upper die and the lower die may be configured as Figures 3 to 5 The structure or lower mold design Figures 3 to 5 The structural form is not specifically limited here, and the purpose is to solve the problem of stress concentration caused by dense indentation lines causing packaging materials (one side or one side) to break, and to reduce the resulting production interruptions and reduce the scrap rate of products.

[0035] The packaging creasing machine provided in the embodiment of the present application has a creasing die, in which a first pressing surface and a second pressing surface are designed with a height difference, and the first pressing surface and the second pressing surface are transitionally connected by a transition connection surface, so that the indentation depth in the intersection area of ​​the indentation lines can be smaller than the indentation depth in other areas, and the indentation depth transitions gradually, thereby avoiding the stress concentration at the intersection point (or dense area) of the indentation during the forming process of the packaging material, which causes the cardboard to break or even rupture, and can significantly improve product quality and production efficiency, thereby improving the stability of packaging quality.

[0036] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A creasing die for a packaging creasing machine, characterized in that: The pressing surface of the indentation die includes a first pressing surface, a second pressing surface and a transition connection surface. A height difference is provided between the first pressing surface and the second pressing surface. The transition connection surface is connected between the first pressing surface and the second pressing surface. The first pressing surface is provided with a plurality of pressing ridges converging and extending toward a preset area. The second pressing surface is arranged corresponding to the preset area. The depth of the indentation that the second pressing surface can produce on the packaging material in the preset area is less than the depth of the indentation that the first pressing surface can produce on the packaging material.

2. The creasing die according to claim 1, characterized in that: A height difference between the first pressing surface and the second pressing surface is 0.1 mm to 0.3 mm.

3. The creasing die according to claim 1, characterized in that: The projection length of the second pressing surface on the plane of the packaging material is 2 mm to 10 mm.

4. The creasing die according to claim 3, characterized in that: When producing sterile packaging materials with a content volume ≤500ml, the projection length of the second pressing surface on the plane of the packaging material is 2mm to 5mm; when producing sterile packaging materials with a content volume ≥500ml and ≤2000ml, the projection length of the second pressing surface on the plane of the packaging material is 4mm to 7mm; when producing sterile packaging materials with a content volume ≥2000ml, the projection length of the second pressing surface on the plane of the packaging material is 6mm to 10mm.

5. The creasing die according to claim 3, characterized in that: The projection length of the transition connection surface on the plane of the packaging material is 3 mm to 10 mm.

6. The creasing die according to claim 5, characterized in that: When producing aseptic packaging materials with a content volume ≤500ml, the projection length of the transition connection surface on the plane of the packaging material is 3mm to 5mm; when producing aseptic packaging materials with a content volume ≥500ml and ≤2000ml, the projection length of the transition connection surface on the plane of the packaging material is 4mm to 7mm; when producing aseptic packaging materials with a content volume ≥2000ml, the projection length of the transition connection surface on the plane of the packaging material is 6mm to 10mm.

7. A packaging creasing machine, characterized in that: The packaging creasing machine comprises the creasing die die according to any one of claims 1 to 6.

8. The packaging creasing machine according to claim 7, characterized in that: The packaging creasing machine comprises a plurality of creasing knife dies of different sizes to meet different production requirements of packaging materials.

9. The packaging creasing machine according to claim 7, characterized in that: The packaging creasing machine comprises an upper mold and a lower mold, and the upper mold and the lower mold are used to respectively indent opposite sides of the packaging material, wherein at least one of the upper mold and the lower mold is the creasing knife mold according to any one of claims 1-6.

10. A packaging material, characterized in that: The packaging material is indented using the packaging indentation machine described in any one of claims 7 to 9.

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