Paper tube, paper box and their pre-folded edge device, method, packaging and forming system

Abstract

The present application relates to a paper box packaging system, and discloses a paper tube, a paper box, and a pre-folding device, method, and packaging forming system thereof, wherein the paper box pre-folding device comprises: a guide plate, along the running direction of the paperboard, the guide plate comprises a guide surface arranged in sequence to bend the bending portion of the paperboard toward the main body to a first angle, and a bending surface for gradually fitting the bending portion of the paperboard to the main body to a second angle, the guide surface is connected to the bending surface, wherein the first angle ranges from 80° to 120°, and the second angle ranges from 0° to 15°. The paper box pre-folding device disclosed in the present application increases the fit between the bending portion of the paperboard and the main body, facilitates heating and sealing in the next process, reduces the risk of non-folding, and improves the sealing performance of the paper box.

Description

Technical Field

[0001] The present application relates to a paper box packaging system, and particularly to a paper tube, a paper box, and their pre-folded edge device, method, and packaging forming system. Background Art

[0002] Currently, many packaged beverages need to be heated, such as milk in a paper box. Moreover, the paper packaging on the market is simple, convenient to use, and widely applied. However, for paper-packaged milk, when it needs to be heated in a microwave oven, due to the limitation of the paper packaging, the milk carton cannot be directly put into the microwave oven for heating, but the milk needs to be poured into another container for heating, which is rather troublesome.

[0003] In view of this, a packaging box made of microwaveable material is now applied. However, due to the characteristics of the microwaveable material itself, its resilience is stronger than that of the original non-microwaveable aluminum foil material. During the longitudinal sealing process of making the paper box, the angle between the bent part and the main body part of the cardboard after being pre-bent is still relatively large, resulting in a high probability that the bent part cannot be bent towards the main body part during the next folding edge process, leading to the failure of the folding edge and the inability to carry out the subsequent heating and sealing process. Summary of the Invention

[0004] The present invention provides a paper box pre-folded edge device, which increases the adhesion between the bent part and the main body part of the paper box, facilitates the heating and sealing in the next process, and reduces the risk of non-folding.

[0005] In order to achieve the above object, the present invention provides a paper box pre-folded edge device, comprising:

[0006] A guide plate, along the running direction of the cardboard, the guide plate includes a guide surface arranged in sequence for bending the bent part of the cardboard towards the main body part to a first angle and a bending surface for gradually fitting the bent part and the main body part of the cardboard to a second angle, the guide surface is connected to the bending surface, wherein, the first angle ranges from 80° to 120°, and the second angle ranges from 0° to 15°.

[0007] The above-mentioned paper box pre-folding device includes a guide plate, on which a guide surface and a bending surface are arranged, and the guide surface is substantially perpendicular to the main body of the paperboard; when the bent portion of the paperboard is bent to be substantially perpendicular to the main body and then further folded using the above-mentioned paper box pre-folding device, the paperboard passes through the guide surface and the bending surface in sequence. Since the guide surface is substantially perpendicular to the main body of the paperboard, the bent portion of the paperboard can be bent toward the main body when passing through the guide surface. Subsequently, when the paperboard passes through the bending surface, the bent portion of the paperboard can be further bent toward the main body under the action of the bending surface, ensuring that the angle between the bent portion and the main body gradually becomes smaller until the bent portion fits with the main body, so as to facilitate the subsequent heating and sealing process to proceed smoothly and reduce the risk of non-folding.

[0008] Therefore, the paper box pre-folding device provided by the present invention, by providing a guide surface and a bending surface connected in sequence, ensures that the bent portion of the paperboard is bent toward the main body under the action of the guide surface during operation, and then the bent portion of the paperboard is bent to fit between the main body under the action of the bending surface, thereby increasing the fit between the bent portion of the paperboard and the main body, facilitating heating and sealing in the next process, and reducing the risk of non-folding.

[0009] Preferably, the guide plate further comprises an introduction surface located on a side of the guide surface away from the bending surface and used for bending the bending portion of the paperboard toward the main body to a third angle, and the third angle ranges from 120° to 150°.

[0010] Preferably, along the running direction of the paperboard, the bending surface includes a first bending surface for bending the bending portion and the main body of the paperboard to a fourth angle and a second bending surface for bending the bending portion and the main body of the paperboard to a second angle, which are connected in sequence, wherein the fourth angle ranges from 30° to 50°.

[0011] Preferably, the guide surface, the first bending surface and the second bending surface are smoothly connected in sequence.

[0012] Preferably, along the running direction of the paperboard, the length of the guide plate is 220-280 mm.

[0013] Preferably, it further comprises an end plate arranged parallel to the running direction of the main body of the paperboard, and the guide plate is arranged on one side of the end plate.

[0014] Preferably, the end plate has an upper end surface and a lower end surface, and along the running direction of the paperboard, the angle between the side edge where the guide surface is connected to the first bending surface and the lower end surface is 60°-120°, the angle between the side edge where the first bending surface is connected to the second bending surface and the lower end surface is 130°-150°, and the angle between the side edge of the second bending surface facing away from the first bending surface and the lower end surface is 165°-180°.

[0015] Preferably, the angle between the introduction surface and the lower end surface of the end plate is 30°-60°.

[0016] Preferably, along the running direction of the paperboard, the width D of the guide plate satisfies: 2T<=D<=4T, wherein T is the width of the bending portion.

[0017] Preferably, the guide plate is made of phenolic resin.

[0018] Preferably, the present invention provides a carton packaging forming system, comprising the above-mentioned carton pre-folding device.

[0019] Preferably, the present invention provides a paper tube comprising paperboard, wherein the paperboard has a folded edge for forming a longitudinal seal, and the folded edge is processed by the above-mentioned paper box packaging forming system.

[0020] Preferably, the present invention provides a paper box comprising the above-mentioned paper tube.

[0021] Preferably, the present invention provides a method for pre-folding a paper box, comprising:

[0022] Along the running direction of the paperboard, the bent portion of the paperboard is guided to the main body by the guide plate so that a first angle is formed between the bent portion and the main body, wherein the first angle is 80°-120°;

[0023] The bent portion of the paperboard is bent toward the main body by a guide plate so that the bent portion and the main body are gradually fitted to a second angle, wherein the second angle is 0°-15°. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a paper box pre-folding device in an embodiment of the present application;

[0025] Figure 2 A top view of the structure of the paper box pre-folding device in the embodiment of the present application;

[0026] Figure 3 A front view structural diagram of a paper box pre-folding device in an embodiment of the present application;

[0027] Figure 4A schematic diagram of a process for folding a cardboard using a carton pre-folded edge device in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of a process for folding a cardboard using a carton pre-folded edge device in an embodiment of the present application;

[0029] Figure 6 A flowchart of steps of a method for pre-folding the edges of a carton in an embodiment of the present application.

[0030] In the figure:

[0031] 1 - guide plate; 11 - guiding surface; 12 - bending surface; 121 - first bending surface; 122 - second bending surface; 13 - introducing surface; 2 - end plate; 3 - cardboard; 31 - bending part; 32 - main body part. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the prior art, the resilience of the bent part of the cardboard for preparing the packaging box for microwaveable materials is relatively large after pre-pressing and bending. When further pre-pressing and bending the cardboard, it is easy to cause the bent part to be unable to be bent to fit with the main body part, thus affecting the subsequent heating and sealing process and resulting in the sealing performance of the packaging carton being affected.

[0034] In view of this, please refer to Figure 1-4 , the present invention provides a carton pre-folded edge device, including: a guide plate 1, along the running direction of the cardboard 3 ( Figure 4 the arrow direction in the figure), the guide plate 1 includes a guiding surface 11 arranged in sequence for bending the bending part 31 and the main body part 32 of the cardboard 3 to a first angle and a bending surface 12 for bending the bending part 31 and the main body part 32 of the cardboard 3 to a second angle, and the guiding surface 11 is connected to the bending surface 12, wherein the first angle ranges from 80° to 120°, and the second angle ranges from 0° to 15°.

[0035] For the above-mentioned carton pre-folded edge device, please refer to Figure 4, including a guide plate 1, the guide plate 1 having a guide surface 11 and a bending surface 12 connected in sequence, the guide surface 11 being substantially perpendicular to the main body 32 of the paperboard 3. When the bending portion 31 of the paperboard 3 is bent to be substantially perpendicular to the main body 32 and then further pre-folded by the above-mentioned paper box pre-folding device, the paperboard 3 first passes through the guide surface 11, and under the action of the guide surface 11, the bending portion 31 of the paperboard 3 can be bent toward the main body 32 and bend to be perpendicular to the main body 32; then, under the action of the bending surface 12, the bending portion 31 of the paperboard 3 can be further bent toward the main body 32 until the bending portion 31 and the main body 32 are in contact. Under the joint action of the above-mentioned guide surface 11 and the bending surface 12, it is possible to ensure that the bending portion 31 of the paperboard 3 is bent toward the main body 32 and is bent to fit with the main body 32, so as to facilitate the subsequent heating and sealing process, thereby increasing the fit between the bending portion and the main body of the paper box, reducing the risk of non-folding, and improving the sealing performance of the packaging paper box.

[0036] In one embodiment, reference may be made to Figure 1 as well as Figure 5 The guide plate 1 also includes an introduction surface 13 located on the side of the guide surface 11 away from the bending surface 12 and used to bend the bending portion 31 of the paperboard toward the main body 32 to a third angle, and the third angle ranges from 120° to 150°. By providing the introduction surface 13 on the guide plate 1, and making the introduction surface 13 located on the side of the guide surface 11 away from the bending surface 12, when the paperboard 3 is running, it first passes through the introduction surface 13, and then passes through the guide surface 11 and the bending surface 12 in sequence. Since the paperboard is in the previous process, the bending portion 31 of the paperboard is perpendicular to the main body 32, but since the paperboard of the microwaveable material has a relatively large rebound, before entering the guide plate 1, the angle between the bending portion 31 and the main body 32 may become an obtuse angle. When the paperboard 3 passes through the introduction surface 13, due to the fast running speed of the paperboard 3, the bending portion 31 of the paperboard 3 is easily bent by the guide plate 1 when entering the guide surface 31 and the bending surface 32, resulting in unevenness, thereby affecting the subsequent longitudinal sealing. In this embodiment, the role of the introduction surface 13 can not only make the paperboard 3 run smoothly, but also make the bending portion 31 slowly fit with the main body 32 in the direction of the main body 32, so as to ensure that the paperboard 3 obtains a good bending effect under the action of the guide plate 1.

[0037] In one embodiment, along the running direction of the cardboard 3, the bending surface 12 includes a first bending surface 121 and a second bending surface 122 which are sequentially connected. The first bending surface 121 is used to bend the bent portion 31 and the main body portion 32 of the cardboard 3 to a fourth angle, and the second bending surface 122 is used to bend the bent portion 31 and the main body portion 32 of the cardboard 3 to a second angle. Among them, the range of the fourth angle is 30°-50°. In this embodiment, the bending surface 12 includes the first bending surface 121 and the second bending surface 122. Among them, the first bending surface 121 is located between the guiding surface 11 and the second bending surface 122. Since the second bending surface 122 can bend the bent portion 31 and the main body portion 32 of the cardboard 3 to fit, the angle between them is small. Compared with the perpendicular state between the bent portion 31 and the main body portion 32 of the cardboard 3 after the cardboard 3 passes through the guiding surface 11, the angle difference is large. Since the third angle is smaller than the first angle and larger than the second angle, by setting the first bending surface 121 for transition, it can make the cardboard 3 complete the bending process more smoothly during the pre-pressing and bending process.

[0038] It should be noted that the above-mentioned guiding surface 11, the first bending surface 121 and the second bending surface 122 are smoothly connected in sequence. Since the running speed of the cardboard 3 is relatively fast, the smooth connection between each part can ensure that the paper box is bent smoothly during the pre-pressing and bending process, avoiding the situation that the bent portion 31 of the cardboard is bent by the guiding plate 1 when passing through the guiding surface 11 and the bending surface 12, resulting in unevenness, ensuring the bending effect, and further ensuring the subsequent longitudinal sealing performance.

[0039] In one embodiment, along the running direction of the cardboard 3, the length of the guiding plate 1 is 220-280 mm. Generally speaking, the running speed of the cardboard 3 is about 650 m / min. Setting the length of the guiding plate 1 to 220-280 mm can ensure the bending time of the cardboard 3, so that the cardboard 3 can be fully bent, and it will not make the size of the pre-folded edge device of the paper box too large, resulting in waste of materials and occupation of space, and improving the utilization rate of the device.

[0040] Furthermore, in the above embodiment, along the running direction of the cardboard 3, the length of the guiding surface 11 can be about 100 mm, the length of the first bending surface 121 can be about 80 mm, and the length of the second bending surface 122 can be about 60 mm. Among them, the length of the guiding surface 11 is longer than that of the first bending surface 121 and the second bending surface 122, which can fully ensure that during the running process of the cardboard 3, the bent portion 31 can be bent towards the main body portion 32, further reducing the risk of non-folding.

[0041] It should be noted that the above size parameters are determined according to the running speed of the cardboard. The device provided in this application can determine the length of the guiding plate according to the actual running speed of the cardboard in actual production applications. The parameter settings in this embodiment are only for reference.

[0042] In one embodiment, the paper box pre-folding device provided in the present application also includes an end plate 2 arranged parallel to the running direction of the main body 32 of the paperboard 3, and the guide plate 1 is arranged on a side edge of the end plate 2. The end plate 2 arranged parallel to the running direction of the paperboard 3 can facilitate the alignment of the guide plate 1 in the running direction of the paperboard 3, thereby ensuring that the angle between the paperboard 3 and the guide plate 1 is constant during the operation, thereby ensuring a better folding effect; in addition, the provision of the end plate 2 also facilitates the coordination of the device in this embodiment with other devices, thereby facilitating the smooth heating and sealing process of the paperboard 3 after pre-pressing and folding.

[0043] Further, in the above embodiment, the end plate 2 has an upper end surface and a lower end surface. Along the running direction of the paperboard 3, the angle between the side edge where the guide surface 11 connects with the first bending surface 121 and the lower end surface is 60°-100°, the angle between the side edge where the first bending surface 121 connects with the second bending surface 122 and the lower end surface is 130°-150°, and the angle between the side edge where the second bending surface 122 faces away from the first bending surface 121 and the lower end surface is 165°-180°. The guide surface 11 is substantially perpendicular to the end plate 2, which can facilitate the bending portion 31 of the paperboard 3 to bend toward the main body 32. The first bending surface 121 can be used for the transition before the paperboard 3 reaches the second bending surface 122, and the second bending surface 122 can be used to fit the bending portion 31 of the paperboard 3 with the main body 32, so that the pre-pressed folding of the paperboard 3 is finally completed.

[0044] Furthermore, in the above embodiment, when the guide plate 1 also has an introduction surface 13 located on the side of the guide surface 11 away from the bending surface 12, the angle between the introduction surface 13 and the lower end surface of the end plate 2 is 30°-60°, which is used to prevent the bending portion 31 of the paperboard 3 from being bent by the guide plate 1 when passing through the guide surface 11 and the bending surface 12 before entering the guide surface 11, thereby preventing the bending portion 31 of the paperboard 3 from being uneven. The bending portion 31 of the paperboard 3 is bent toward the main body 32, thereby reducing the risk of non-folding and ensuring the subsequent longitudinal sealing performance.

[0045] It should be noted that, in the above embodiments, reference may be made to Figure 4 , along the running direction of the paperboard 3, the width D of the guide plate 1 satisfies the following condition: 2T<=D<=4T, where T is the width of the bending portion 31. By setting the width of the guide plate 1 between twice and four times the width of the bending portion 31, it is ensured that the bending portion 31 is in full contact with the guide surface 11, the bending surface 12, etc. during the running of the paperboard 3, so that the bending portion 31 can be folded in a state of being in contact with the guide plate 1, thereby improving the folding effect, not wasting too much material, and saving the space occupied by the paper box pre-folding device in the present application.

[0046] In one embodiment, the material of the guide plate 1 in the present application is phenolic resin. Since phenolic resin has anti-static and high temperature resistance properties, it can maintain its own smoothness during the high-speed operation of the cardboard 3, thereby ensuring the folding effect of the cardboard 3.

[0047] Based on the same inventive concept, the present application can also provide a paper box packaging forming system, including the paper box pre-folding device in the above-mentioned embodiments. Since the above-mentioned paper box pre-folding device reduces the risk of non-folding and ensures the folding effect, it is convenient to improve the sealing performance of the paper box in the subsequent heating and sealing process.

[0048] Based on the same inventive concept, the present application can also provide a paper tube, which includes paperboard, and the paperboard has a folded edge for forming a longitudinal seal. The folded edge is processed by the above-mentioned paper box packaging forming system. Since the folded edge has good sealing performance, it also ensures good sealing performance of the paper tube.

[0049] Based on the same inventive idea, the present application can also provide a paper box, including the above-mentioned paper tube, which is further folded and packaged to form a paper box. The paper box can not only be used in microwaves, but also overcome the problem that microwaveable materials have large resilience and are difficult to fold, thereby ensuring a good sealing effect of the paper box.

[0050] Based on the same inventive idea, the present application can also provide a pre-folding method for the above-mentioned paper box, such as Figure 6 As shown, the method comprises the following steps: along the running direction of the paperboard,

[0051] S1: guiding the bent portion 31 of the paperboard 3 to the main body 32 through the guide plate 1 so that a first angle is formed between the bent portion 31 and the main body 32, and the first angle is 80°-120°;

[0052] S2: bend the bent portion 31 of the paperboard 3 toward the main body 32 by the guide plate 1 so that the bent portion 31 and the main body 32 gradually fit together to a second angle, wherein the second angle is 0°-15°.

[0053] It should be noted that in step S1, the bending portion 31 of the paperboard 3 is guided to the main body 32 by the guide surface 11 of the guide plate 1. During the operation of the paperboard 3, the bending portion 31 bends toward the main body 32; or, it can be achieved by the introduction surface 13 of the guide plate 1 and the guide surface 11 together. The introduction surface 13 is located on the side of the guide surface 11 away from the bending surface 12. The introduction surface 13 can make the angle between the bending portion 31 and the main body 32 of the paperboard 3 with a large angle between the bending portion 31 and the main body 32 smaller when entering the guide surface 11, thereby further reducing the risk of non-folding. In actual application production, it can be set according to specific conditions, which will not be described in detail here.

[0054] The above pre-folded edge method, for microwaveable cardboard, well solves the problem of large resilience of microwaveable materials, thereby reducing the risk of non-folding, facilitating subsequent heat sealing, and ensuring the sealing effect of the paper box.

[0055] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A carton pre-folding device, It is characterized in that include: A guide plate (1) is arranged along the running direction of the paperboard (3), the guide plate (1) comprising a guide surface (11) for bending a bending portion (31) of the paperboard (3) toward a main body (32) to a first angle, and a bending surface (12) for gradually fitting the bending portion (31) and the main body (32) of the paperboard (3) to a second angle, the guide surface (11) being connected to the bending surface (12), wherein the first angle ranges from 80° to 120°, and the second angle ranges from 0° to 15°; The guide plate (1) further comprises an introduction surface (13) located on a side of the guide surface (11) away from the bending surface (12) and used for bending the bending portion (31) of the paperboard (3) toward the main body (32) to a third angle, wherein the third angle ranges from 120° to 150°; The introduction surface (13), the guide surface (11) and the bending surface (12) are configured such that: during the movement of the paperboard (3) along the movement direction, the paperboard (3) is allowed to first pass through the introduction surface (13) and then pass through the guide surface (11) and the bending surface (12) in sequence, so that the bending portion (31) of the paperboard (3) gradually fits the main body (32) in the direction toward the main body (32); Wherein, along the running direction of the paperboard (3), the bending surface (12) comprises a first bending surface (121) for bending the bending portion (31) and the main body (32) of the paperboard (3) to a fourth angle and a second bending surface (122) for bending the bending portion (31) and the main body (32) of the paperboard (3) to a second angle, which are connected in sequence, wherein the fourth angle ranges from 30° to 50°; The paper box pre-folding device further comprises an end plate (2) arranged parallel to the running direction of the main body (32) of the paperboard (3); the guide plate (1) is arranged on one side of the end plate (2); the end plate (2) comprises an upper end surface and a lower end surface; along the running direction of the paperboard (3), the angle between the side edge connecting the guide surface (11) and the first bending surface (121) and the lower end surface is 60°-100°, the angle between the side edge connecting the first bending surface (121) and the second bending surface (122) and the lower end surface is 130°-150°, and the angle between the side edge of the second bending surface (122) away from the first bending surface (121) and the lower end surface is 165°-180°; the angle between the introduction surface (13) and the lower end surface of the end plate (2) is 30°-60°.

2. The carton pre-folding device according to claim 1, It is characterized in that The guide surface (11), the first bending surface (121) and the second bending surface (122) are smoothly connected in sequence.

3. The carton pre-folding device according to claim 1, It is characterized in that Along the running direction of the cardboard (3), the length of the guide plate (1) is 220 - 280 mm.

4. The carton pre - folding edge device according to claim 1, characterized in that, along the running direction of the cardboard (3), the width D of the guide plate (1) satisfies: 2T <= D <= 4T, where T is the width of the bending part (31).

5. The carton pre - folding edge device according to claim 1, characterized in that, the material of the guide plate (1) is phenolic resin.

6. A carton packaging and forming system, characterized in that, it includes the carton pre - folding edge device according to any one of claims 1 - 5.

7. A paper tube, comprising a cardboard, and the cardboard has a folding edge for forming a longitudinal seal, characterized in that, the folding edge is processed by the carton packaging and forming system according to claim 6.

8. A carton, characterized in that, it includes the paper tube according to claim 7.

9. A pre - folding edge method for the carton according to claim 8, characterized in that, it includes: along the running direction of the cardboard (3), guiding the bending part (31) of the cardboard (3) to the main body part (32) through the guide plate (1) so that there is an included angle of the first angle between the bending part (31) and the main body part (32), and the first angle is 80° - 120°; bending the bending part (31) of the cardboard (3) towards the main body part (32) through the guide plate (1) so that the bending part (31) and the main body part (32) are gradually fitted to the second angle, and the second angle is 0° - 15°.

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