Packaging structure, packaging method, packaging apparatus, and storage medium

Abstract

A packaging structure, a packaging method, a packaging apparatus, and a storage medium. The packaging structure includes: a to-be-packaged article and a packaging sheet. The to-be-packaged article includes a plurality of packaging sleeves stacked along a first direction, so that the to-be-packaged article has a plurality of side surfaces. The packaging sheet surrounds the to-be-packaged article, and the packaging sheet is provided with a first seam. The packaging sheet includes a first sheet portion and a second sheet portion. The first sheet portion is located on a first side surface of the plurality of side surfaces of the to-be-packaged article, and the first sheet portion includes a first seam area and a first non-seam area. The first seam is located in the first seam area. The second sheet portion is located on a second side surface of the plurality of side surfaces of the to-be-packaged article. The first sheet portion has a first thickness in the first non-seam area, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness. The above packaging structure can avoid the deformation problem of the packaging sleeve and is beneficial to subsequent filling process.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to a packaging structure, a packaging method, a packaging apparatus, and a storage medium. BACKGROUND

[0002] The packaging sleeve is a semi-finished product for manufacturing food or beverage packaging. The packaging sleeve is made of a flat blank and manufactured by folding the blank first and then welding or adhering the blank. In order to facilitate transportation, the packaging sleeve is packaged in a flat folded manner in an outer package.

[0003] For example, a plurality of packaging sleeves are flat-folded into a row, then wrapped by a packaging film adopted by the outer package as a packaging sleeve group, and further transported to a filling site for filling beverages. In actual production, due to the force applied by the outer package on the outside of the packaging sleeve when wrapping the packaging sleeve is not well controlled, the packaging sleeve is deformed, thereby affecting the subsequent filling process. SUMMARY

[0004] The first aspect of the present disclosure provides a packaging structure, comprising: a to-be-packaged article comprising a plurality of packaging sleeves, the plurality of packaging sleeves being stacked along a first direction, so that the to-be-packaged article 1 has a plurality of side surfaces, each of the side surfaces extending along the first direction; and a packaging sheet surrounding the to-be-packaged article, the packaging sheet being provided with a first seam S1, the first seam extending along the first direction, the packaging sheet comprising: a first sheet portion located on a first side surface of the plurality of side surfaces of the to-be-packaged article 1, the first sheet portion comprising a first seam area and a first non-seam area, the first seam being located in the first seam area, the thickness of the first sheet portion in the first seam area and the first non-seam area being different; a second sheet portion located on a second side surface of the plurality of side surfaces of the to-be-packaged article, the second side surface being oppositely arranged with the first side surface in a second direction perpendicular to the first direction; wherein the first sheet portion has a first thickness in the first non-seam area, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness.

[0005] In at least one embodiment, the first seam region and the first non-seam region both extend along the first direction; the first non-seam region includes a first sub-region and a second sub-region, the first sub-region and the second sub-region are located on opposite sides of the first seam region along a third direction, the third direction is perpendicular to the first direction and the second direction; wherein the first sheet portion includes: a first sub-sheet portion located in the first sub-region, the first sub-sheet portion has a first sub-sheet thickness; a second sub-sheet portion located in the second sub-region, the second sub-sheet portion has a second sub-sheet thickness; wherein the first sub-sheet thickness and the second sub-sheet thickness are not equal, and the second thickness is greater than the first sub-sheet thickness and the second sub-sheet thickness.

[0006] In at least one embodiment, the first sub-sheet portion includes, in the third direction, a first portion close to the first seam region and a second portion away from the first seam region, the thickness of the first portion is less than the thickness of the second portion; and / or the second sub-sheet portion includes, in the third direction, a third portion close to the first seam region and a fourth portion away from the first seam region, the thickness of the third portion is less than the thickness of the fourth portion.

[0007] In at least one embodiment, the packaging sheet is further provided with a second seam, the second seam extends along the first direction; the second sheet portion includes a second seam region and a second non-seam region, the second seam is located in the second seam region, the thickness of the second sheet portion in the second seam region and the second non-seam region is different; the second sheet portion has a first sub-thickness in the second non-seam region; wherein the first sub-thickness is less than the thickness of the second sheet portion in the second seam region and greater than the first thickness of the first sheet portion in the first non-seam region.

[0008] In at least one embodiment, the second seam region and the second non-seam region both extend along the first direction, the second non-seam region includes a third sub-region and a fourth sub-region; the third sub-region and the fourth sub-region are located on opposite sides of the second seam region along a third direction, the third direction is perpendicular to the first direction and the second direction; wherein the second sheet portion includes: a third sub-sheet portion located in the third sub-region, the third sub-sheet portion has a third sub-sheet thickness; a fourth sub-sheet portion located in the fourth sub-region, the fourth sub-sheet portion has a fourth sub-sheet thickness; wherein the third sub-sheet thickness and the fourth sub-sheet thickness are not equal, and the third sub-sheet thickness and the fourth sub-sheet thickness are both greater than the first thickness of the first sheet portion in the first non-seam region.

[0009] In at least one embodiment, the third sub-sheet portion includes, in the third direction, a fifth portion proximate to the second seam region and a sixth portion distal to the second seam region, the fifth portion having a thickness greater than a thickness of the sixth portion; and / or the fourth sub-sheet portion includes, in the third direction, a seventh portion proximate to the second seam region and an eighth portion distal to the second seam region, the seventh portion having a thickness greater than a thickness of the eighth portion.

[0010] In at least one embodiment, a ratio of the second thickness to the first thickness is in a range from 1.12 to 1.19, and a ratio of a deformation amount of the first sheet portion to a deformation amount of the second sheet portion is in a range from 4.5 to 13.

[0011] In at least one embodiment, the packaging sheet further includes: a third sheet portion located on a third side of the plurality of sides of the article to be packaged, the third side being located between the first side and the second side in the second direction; and a fourth sheet portion located on a fourth side of the plurality of sides of the article to be packaged, the fourth side being located opposite to the third side in a third direction, the third direction being perpendicular to the first direction and the second direction; wherein the third sheet portion has a third thickness, and the fourth sheet portion has a fourth thickness, at least one of the third thickness and the fourth thickness being greater than the first thickness and smaller than the second thickness.

[0012] In at least one embodiment, the third sheet portion includes, in the second direction, a first edge portion proximate to the first side and a second edge portion distal to the first side, the first edge portion having a thickness smaller than a thickness of the second edge portion; and / or the fourth sheet portion includes, in the second direction, a third edge portion proximate to the first side and a fourth edge portion distal to the first side, the third edge portion having a thickness smaller than a thickness of the fourth edge portion.

[0013] In at least one embodiment, the article to be packaged further includes a first end side and a second end side located opposite to each other in the first direction; at least one of the first edge portion and the second edge portion includes, in the first direction, a first proximal end proximate to the first end side, a first distal end proximate to the second end side, and a first middle portion located between the first proximal end and the first distal end; at least one of the third edge portion and the fourth edge portion includes, in the first direction, a second proximal end proximate to the first end side, a second distal end proximate to the second end side, and a second middle portion located between the second proximal end and the second distal end; wherein the first proximal end and the first distal end each have a thickness greater than a thickness of the first middle portion; and / or the second proximal end and the second distal end each have a thickness greater than a thickness of the second middle portion.

[0014] In at least one embodiment, the material of the packaging sheet is configured to have a stretch property and / or a shrink property; the packaging sheet further comprises: a detectable marker disposed on at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, the detectable marker comprising: a plurality of detectable patterns arranged along a stretchable direction of the packaging sheet and configured to determine an amount of deformation of the at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion when stretched or shrunk along the stretchable direction, wherein the stretchable direction comprises at least one of the first direction, the second direction, and a third direction perpendicular to the first direction and the second direction.

[0015] In at least one embodiment, the detectable marker is disposed on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion; the detectable marker comprises: a first detectable marker disposed on one of the at least two adjacent sheet portions and comprising a plurality of first detectable patterns arranged along the second direction, the plurality of first detectable patterns extending along the first direction; and a second detectable marker disposed on the other of the at least two adjacent sheet portions and comprising a plurality of second detectable patterns arranged along the third direction, the plurality of second detectable patterns extending along the first direction.

[0016] In at least one embodiment, the detectable marker is disposed on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, the detectable marker comprising: a plurality of detectable patterns arranged along the first direction, each detectable pattern comprising: a first detectable portion extending along the second direction; and a second detectable portion connected to the first detectable portion and extending along the third direction, wherein the first detectable portion and the second detectable portion are disposed on the at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, respectively.

[0017] In at least one embodiment, the detectable pattern comprises a visible pattern or an invisible pattern, the visible pattern comprising at least one of a dot pattern, a line pattern, and a surface pattern.

[0018] In at least one embodiment, each of the packaging sleeves comprises two openings, the opening directions of the two openings being perpendicular to the first seam.

[0019] The second aspect of the present disclosure provides a packaging method, comprising: wrapping a packaging sheet around a to-be-packaged article, wherein the to-be-packaged article comprises a plurality of packaging sleeves stacked along a first direction, such that the to-be-packaged article has a plurality of sides, each of which extends along the first direction, the packaging sheet is provided with a first seam extending along the first direction, the packaging sheet comprises: a first sheet portion located on a first side of the plurality of sides of the to-be-packaged article, the first sheet portion comprises a first seam area and a first non-seam area, the first seam is located in the first seam area, and the thickness of the first sheet portion in the first seam area and the first non-seam area is different; and a second sheet portion located on a second side of the plurality of sides of the to-be-packaged article, the second side is oppositely arranged with the first side in a second direction perpendicular to the first direction; wherein the first sheet portion has a first thickness in the first non-seam area, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness.

[0020] In at least one embodiment, the packaging sheet further comprises: a third sheet portion located on a third side of the plurality of sides of the to-be-packaged article, the third side is located between the first side and the second side in the second direction; and a fourth sheet portion located on a fourth side of the plurality of sides of the to-be-packaged article, the fourth side is oppositely arranged with the third side in a third direction perpendicular to the first direction and the second direction, before the packaging sheet is wrapped around the to-be-packaged article; the packaging method further comprises: forming a detectable marker on at least one of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion of the packaging sheet, wherein the detectable marker comprises: a plurality of detectable patterns arranged along a stretchable direction of the packaging sheet and configured to determine the deformation amount of the at least one of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion when stretching or contracting occurs along the stretchable direction.

[0021] In at least one embodiment, the forming the detectable marker on the at least one of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion of the packaging sheet comprises: forming the detectable marker on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion, wherein the detectable marker comprises: a first detectable marker disposed on one of the at least two adjacent sheet portions and comprising a plurality of first detectable patterns disposed along the second direction, the plurality of first detectable patterns extending along the first direction and the plurality of first detectable patterns being equally spaced at a first distance; and a second detectable marker disposed on the other of the at least two adjacent sheet portions and comprising a plurality of second detectable patterns disposed along the third direction, the plurality of second detectable patterns extending along the first direction and the plurality of second detectable patterns being equally spaced at a second distance, wherein a distance between a first detectable pattern of the plurality of first detectable patterns closest to the second detectable pattern and a second detectable pattern of the plurality of second detectable patterns closest to the first detectable pattern is a third distance, wherein the first distance, the second distance and the third distance are equal.

[0022] In at least one embodiment, after the packaging sheet is wrapped around the to-be-packaged article, the packaging method further comprises: re-detecting the first distance, the second distance and the third distance, and determining deformation amounts of the packaging sheet in the second direction and the third direction respectively according to a detection result; and adjusting a tensioning degree of the packaging sheet when being wrapped around the to-be-packaged article according to the deformation amounts of the packaging sheet in the second direction and the third direction.

[0023] In at least one embodiment, a ratio of the deformation amount of the first sheet portion to the deformation amount of the second sheet portion ranges from 2.89 to 10.75.

[0024] A third aspect of the present disclosure provides a packaging device, comprising: a processor; and a memory, wherein the memory has computer executable code stored therein, the computer executable code, when executed by the processor, performs the packaging method as described above.

[0025] A fourth aspect of the present disclosure provides a computer readable storage medium having executable code stored thereon, the executable code, when executed by a processor, causes the processor to perform the packaging method as described above. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure and not limit the present disclosure.

[0027] Figure 1 A perspective view of a packaging structure according to an embodiment of the present disclosure;

[0028] Figure 2 A view taken along the X-X line of Figure 1 ;

[0029] Figure 3 A plan view of a blank for folding into a packaging sleeve according to an embodiment of the present disclosure;

[0030] Figure 4 A view of the structure of a packaging sleeve in an article to be packaged according to an embodiment of the present disclosure;

[0031] Figures 5A-5D A view of a packaging process of an article to be packaged according to an embodiment of the present disclosure;

[0032] Figure 6 A view of a first sheet portion and a second sheet portion according to an embodiment of the present disclosure;

[0033] Figure 7 A view of a first sheet portion and a second sheet portion according to another embodiment of the present disclosure;

[0034] Figure 8 A view taken along the Y-Y line of Figure 2 ;

[0035] Figure 9 A view taken along the Z-Z line of Figure 2 ;

[0036] Figure 10 A perspective view of a packaging structure according to another embodiment of the present disclosure;

[0037] Figure 11 A view taken along the I-I line of Figure 10 ;

[0038] Figure 12 A view of a first sheet portion and a second sheet portion according to a further embodiment of the present disclosure;

[0039] Figure 13 A view of a first sheet portion and a second sheet portion according to a still further embodiment of the present disclosure;

[0040] Figure 14 A view of Figure 1a second packaging sheet and a third packaging sheet according to the present disclosure;

[0041] Figure 15 a perspective view of a packaging structure according to another embodiment of the present disclosure;

[0042] Figure 16 a perspective view of a packaging structure according to still another embodiment of the present disclosure;

[0043] Figure 17 a flow chart of a packaging method according to an embodiment of the present disclosure;

[0044] Figure 18 a structural block diagram of a packaging apparatus according to an embodiment of the present disclosure;

[0045] Figure 19 a structural block diagram of an apparatus for implementing a packaging method according to an embodiment of the present disclosure;

[0046] Figure 20 a schematic view of a storage medium according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present disclosure.

[0048] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs. The terms "first", "second", and similar terms used herein do not necessarily denote any order, quantity, or importance, but are used to distinguish one element from another. The terms "comprises", "comprising", "includes", "including" and the like can mean the presence of a stated element or elements in the "comprising" or "including" element or elements and the like and are not limited to the presence of the stated element or elements by way of an exclusive "only" relationship. The terms "connected", "coupled", and the like can not necessarily denote a direct connection or coupling, but can also denote an indirect connection or coupling such as through one or more other elements or intervening elements that are not shown or described. The terms "upper", "lower", "left", "right" and the like are used to denote relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.

[0049] The packaging sleeves are usually provided with two openings arranged on opposite sides of the packaging sleeves. The flat packaging sleeves are stacked together in a space-saving manner to form a packaging sleeve group, and then the packaging sleeve group is surrounded by an outer package made of, for example, a plastic material film to form a bundle, which is convenient for transportation to a filling site. When the filling process needs to be performed, the outer package is removed first, and then the packaging sleeves are taken out, and then beverages or food are filled into the packaging sleeves.

[0050] The packaging sleeves are surrounded by the plastic material film. If the plastic material film is wound too loosely, the packaging sleeve group is prone to be loose and not space-saving. If the plastic material film is wound too tightly, the packaging sleeves in the outer package are prone to be deformed due to extrusion, which is not conducive to subsequent filling of beverages or food into the packaging sleeves.

[0051] The packaging structure provided by at least one embodiment of the present disclosure comprises: a to-be-packaged article and a packaging sheet. The to-be-packaged article comprises a plurality of packaging sleeves stacked along a first direction, so that the to-be-packaged article has a plurality of side surfaces each extending along the first direction. The packaging sheet surrounds the to-be-packaged article, and the packaging sheet is provided with a first seam extending along the first direction. The packaging sheet comprises a first sheet portion and a second sheet portion. The first sheet portion is located on a first side surface of the plurality of side surfaces of the to-be-packaged article, and the first sheet portion comprises a first seam area and a first non-seam area. The first seam is located in the first seam area, and the thickness of the first sheet portion in the first seam area and the first non-seam area is different. The second sheet portion is located on a second side surface of the plurality of side surfaces of the to-be-packaged article, and the second side surface is arranged opposite to the first side surface in a second direction perpendicular to the first direction. The first sheet portion has a first thickness in the first non-seam area, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness.

[0052] In the packaging structure provided by the above embodiments of the present disclosure, since the packaging sheet bears a larger winding force on the first side surface and a smaller winding force on the second side surface, the second thickness of the second sheet portion located on the second side surface is greater than the first thickness of the first sheet portion in the first non-seam area located on the first side surface, which not only avoids the deformation problem of the packaging sleeves in the packaging sheet and ensures the quality of the packaging sleeves, but also is conducive to the subsequent filling process.

[0053] The present disclosure will be described below through specific embodiments. In order to keep the following description of the embodiments of the present disclosure clear and concise, the detailed description of known functions and known components can be omitted. When any component of the embodiments of the present disclosure appears in more than one figure, the component can be denoted by the same reference numeral in each figure.

[0054] Figure 1 A perspective view of a packaging structure according to an embodiment of the present disclosure. Figure 2 A schematic view taken along Figure 1 the X-X line.

[0055] As shown in Figure 1 , the packaging structure includes an article to be packaged 1 and a packaging sheet 2, the packaging sheet 2 being wrapped around the article to be packaged 1, that is, the article to be packaged 1 is placed in the packaging sheet 2. The article to be packaged 1 includes, for example, a plurality of packaging sleeves 10 stacked along a first direction D1.

[0056] In an embodiment of the present disclosure, the plurality of packaging sleeves 10 can be stacked in a completely overlapping manner in the first direction D1, or in a partially overlapping manner. When stacked in a completely overlapping manner, not only is the space occupied saved, but the difficulty of packaging caused by irregular shapes is also reduced, which is advantageous for improving packaging efficiency, and is therefore preferred.

[0057] As shown in Figure 1 , when the plurality of packaging sleeves 10 are stacked with each other, the plurality of packaging sleeve layers 10 cause the article to be packaged 1 to have a columnar structure such as a quadrangular prism. For example, the quadrangular prism has a first convex edge TL1, a second convex edge TL2, a third convex edge TL3, and a fourth convex edge TL4. The plurality of sides of the article to be packaged 1 are the four sides of the quadrangular prism. The four sides include a first side CM1, a second side CM2, a third side CM3, and a fourth side CM4 formed by edges of the plurality of packaging sleeves 10, wherein the first side CM1 and the second side CM2 are oppositely arranged along a second direction D2, and the third side CM3 and the fourth side CM4 are oppositely arranged along a third direction D3. The second direction D2 is perpendicular to the first direction D1, and the third direction D3 is perpendicular to the first direction D1 and the second direction D2, respectively. Each side extends along the first direction D1.

[0058] In an embodiment of the present disclosure, the packaging sleeve 10 is made of a flat blank, and can be made, for example, by folding the blank and welding or bonding the seams.

[0059] Figure 3 A plan view of a blank for folding into a packaging sleeve according to an embodiment of the present disclosure. For example, as shown in Figure 3As shown, the blank P can include multiple layers of different materials (e.g., paper, thin cardboard, hard cardboard, plastic material, or metal (particularly aluminum)). The blank P has multiple fold lines a that are intended to facilitate folding of the blank 1 and to divide the blank P into multiple faces. For example, the blank P includes a first surface P1, a second surface P2, a front surface P3, a back surface P4, a sealing surface P5, a bottom surface P6, and a top surface P7. The sealing surface P5 is connected to the front surface P3 by, for example, welding or bonding, and the blank P is folded along the fold lines a, thereby forming the packaging sleeve 10.

[0060] As shown in Figure 3 , each packaging sleeve 10 includes two openings that are oppositely arranged along the third direction D3, thereby forming a "sleeve" configuration. For example, each packaging sleeve 10 has a first side 11 and a second side 12 that is opposite to the first side 11 along the third direction D3. Each packaging sleeve 10 includes two openings that are respectively arranged on the first side 11 and the second side 12.

[0061] Figure 4 A schematic view of the structure of the packaging sleeve in the article to be packaged according to an embodiment of the present disclosure. As shown in Figure 4 , each packaging sleeve 10 is substantially planar after being pressed. Here, "substantially" means generally or approximately planar, allowing for a small amount of error.

[0062] In combination with Figure 1 , Figure 3 , and Figure 4 , for example, the plurality of packaging sleeves 10 are stacked along the first direction D1, and the opening directions (e.g., the third direction D3) of the two openings of each packaging sleeve 10 are perpendicular to the first seam S1. Also, the sealing surface P5 is perpendicular to the first seam S1. This can save space occupied in the packaging sheet 2, make the packaging structure more compact, have strong compression resistance, and facilitate transportation.

[0063] Returning to Figure 1 and Figure 2 , the packaging sheet 2 wraps around the article to be packaged 1, that is, along the circumferential direction of the article to be packaged 1. As shown in Figure 2 , when the packaging sheet 2 wraps around the article to be packaged 1, the packaging sheet 2 includes a first sheet portion 21 on the first side CM1, a second sheet portion 22 on the second side CM2, a third sheet portion 23 on the third side CM3, and a fourth sheet portion 24 on the fourth side CM4. The first sheet portion 21 and the second sheet portion 22 are oppositely arranged to each other, and the third sheet portion 23 and the fourth sheet portion 24 are oppositely arranged to each other. Since the packaging sheet 2 is in contact with each side of the article to be packaged 1, this can improve the tightness of the packaging structure.

[0064] In this embodiment of the disclosure, the packaging sheet 2 is configured to have at least one seam extending along the stacking direction (i.e., the first direction D1) of the plurality of packaging sleeves. In this embodiment of the disclosure, unless otherwise specified, "extending along a certain direction" should be understood as extending substantially along a certain direction, and a certain deviation from that direction may be allowed, which is within a tolerable tolerance range.

[0065] For example, when the packaging sheet 2 is configured to have one seam, the outer packaging can be made from a single packaging sheet that is wrapped around and welded to multiple packaging sleeves. Alternatively, when the packaging sheet 2 is configured to have two seams, the outer packaging can be made from two packaging sheets that are placed on opposite sides of the item to be packaged and welded together.

[0066] For example, such as Figure 2 As shown, the packaging sheet 2 is provided with a first seam S1, which extends along a first direction D1. The first sheet portion 21 includes a first seam area SA1 and a first non-seam area NSA1. The first seam S1 is located in the first seam area SA1.

[0067] It should be noted that, Figure 1 The position of the first seam S1 on the first side CM1 of the item to be packaged 1 is variable, that is, the first seam S1 can be located at the upper, middle or lower part of the first side CM1, and this disclosure does not limit it.

[0068] In this embodiment of the application, the first seam S1 and the second seam S2, which will be described below, are, for example, welds formed during the process of using the packaging sheet 2 to package the items to be packaged. As mentioned above, in order to wrap the items to be packaged 1, welds are formed on the packaging sheet 2 during the welding or bonding process.

[0069] For example, the first seam S1 extends along the length of the item 1 to be packaged. The length of the first seam S1 along the first direction D1 can be the same as or different from the length of the item 1 to be packaged along the first direction D1. When the length of the first seam S1 along the first direction D1 is different from the length of the item 1 to be packaged along the first direction D1, the length of the first seam S1 along the first direction D1 is greater than or equal to the length of the item 1 to be packaged along the first direction D1. This helps to control the winding force of the packaging sheet 2 along the entire length of the item 1 to be packaged, thereby more tightly wrapping the multiple packaging sleeves 10 in the packaging sheet 2.

[0070] For illustrative purposes, the cross-sectional shape of the first joint S1 in the accompanying drawings of this disclosure is rectangular. In actual production, the cross-sectional shape of the first joint S1 is not necessarily rectangular; for example, it can be other regular or irregular shapes. This disclosure does not specifically limit this.

[0071] In the embodiment of the present application, since the first joint S1 is formed in the first joint area SA1, and no joint is formed in the first non-joint area NSA1, the first sheet portion 21 has different thicknesses in the first joint area SA1 and the first non-joint area NSA1. For example, the thickness of the first sheet portion 21 in the first joint area SA1 is greater than the thickness of the first sheet portion 21 in the first non-joint area NSA1. In the embodiment of the present disclosure, the thickness of the first sheet portion 21 in the first joint area SA1 includes the sum of the thickness of the sheet itself and the thickness of the first joint S1.

[0072] To help understand, the following describes in detail the packaging process of the to-be-packaged articles 1 using the packaging sheet 2. Figures 5A-5D A schematic view of the packaging process of the to-be-packaged articles according to the embodiment of the present disclosure.

[0073] As shown in FIG. 1, the packaging sheet 2 is held, for example, in the vertical direction (for example, the third direction D3 shown in the figure). The to-be-packaged articles 1 include a plurality of packaging sleeves 10 arranged in a stack in the first direction D1 (for the sake of simplicity, only the to-be-packaged articles 1 are shown in FIG. 1). The to-be-packaged articles 1 can be conveyed by a conveying device in a conveying direction (for example, the second direction D2 shown in the figure) to the packaging sheet 2. Figure 5A Figure 5A As shown in FIG. 2, as the to-be-packaged articles 1 move in the conveying direction, the packaging sheet 2 is pushed by the to-be-packaged articles 1 and wraps the to-be-packaged articles 1 in a direction opposite to the conveying direction. That is, the to-be-packaged articles 1 are wrapped from the front side FS (i.e., the side of the to-be-packaged articles 1 facing the packaging sheet 2) to the rear side RS (i.e., the side of the to-be-packaged articles 1 facing away from the packaging sheet 2), thereby holding the plurality of packaging sleeves 10 together.

[0074] As shown in FIG. 3, the to-be-packaged articles 1 are conveyed to the packaging sheet 2, and the packaging sheet 2 is wrapped around the to-be-packaged articles 1. The plurality of packaging sleeves 10 are held together by the packaging sheet 2. Figure 5B As shown in FIG. 4, the to-be-packaged articles 1 are conveyed to the packaging sheet 2, and the packaging sheet 2 is wrapped around the to-be-packaged articles 1. The plurality of packaging sleeves 10 are held together by the packaging sheet 2.

[0075] Figure 5B As shown in FIG. 5, the to-be-packaged articles 1 are conveyed to the packaging sheet 2, and the packaging sheet 2 is wrapped around the to-be-packaged articles 1. The plurality of packaging sleeves 10 are held together by the packaging sheet 2.

[0076] As shown in FIG. 6, the to-be-packaged articles 1 are conveyed to the packaging sheet 2, and the packaging sheet 2 is wrapped around the to-be-packaged articles 1. The plurality of packaging sleeves 10 are held together by the packaging sheet 2. Figure 5C ​​As shown, the sealing device for sealing the article 1 to be packaged includes a pair of sealing components 14a and 14b, which are configured to move toward or away from each other. The article 1 to be packaged continues to move along the conveying direction. Viewed from the conveying direction, when the article 1 to be packaged is conveyed between the sealing components 14a and 14b to the rear of the sealing components 14a and 14b, the two sealing components 14a and 14b move toward each other and weld the packaging sheet 2 together. At this time, the packaging sheet 2 surrounds the article 1 to be packaged in the circumferential direction, thereby tightly wrapping the article 1 to be packaged.

[0077] like Figure 5D As shown, the sealing device may further include a cutting component 15 disposed in the sealing assemblies 14a and 14b for cutting the packaging sheet 2. For example, the cutting component 15 includes a cutter or blade. The welded packaging sheet 2 is cut by the cutting component 15, forming a first seam S1 on the rear side of the article 1 to be packaged.

[0078] from Figures 5A-5D It can be seen that during the packaging process of the item 1 to be packaged, the portion of the packaging sheet 2 located on the front side (i.e., the surface of the front side FS of the item 1 to be packaged) experiences relatively small winding force. Therefore, this portion of the packaging sheet 2 has a small deformation, and its thickness remains basically unchanged or decreases only slightly. The portion of the packaging sheet 2 located on the rear side (i.e., the surface of the rear side RS of the item 1 to be packaged) (except at the first seam S1) experiences a larger winding force due to the compression or dragging of the sealing device. Therefore, this portion of the packaging sheet 2 has a larger deformation, and its thickness changes more significantly, i.e., its thickness decreases more. In this embodiment of the present disclosure, the deformation of the packaging sheet includes stretching and / or shrinkage.

[0079] For example, such as Figure 2 and Figure 5D As shown, the first sheet portion 21 is located in Figure 5D On the rear side of the item to be packaged 1, the second sheet portion 22 is located Figure 5D On the front side of the item to be packaged 1. Assuming that the first sheet portion 21 has a first thickness T1 in the first non-seamless area NSA1 and the second sheet portion 22 has a second thickness T2, then, since the winding force borne by the second sheet portion 22 is smaller than the winding force borne by the first sheet portion 21, the second thickness T2 is greater than the first thickness T1.

[0080] The packaging structure provided in the above-described embodiments of the present disclosure, since the winding force borne by the second sheet portion 22 is smaller than that borne by the first sheet portion 21, avoids the deformation of the packaging sleeve 10 due to excessive force on the front side of the item to be packaged 1, thereby ensuring the quality of the packaging sleeve 10 inside the packaging sheet 2, which is beneficial to the subsequent filling process.

[0081] For example, such as Figure 2 As shown, a first seam area SA1 having a first seam S1 extends along a first direction D1. A first non-seam area NSA1 without a first seam S1 also extends along the first direction D1. The first non-seam area NSA1 includes a first sub-area A1 and a second sub-area A2, which are located on opposite sides of the first seam area SA1 along a third direction D3. For example, the first sub-area A1 is located on a first side of the first seam area SA1 (e.g., the upper side shown in the figure), and the second sub-area A2 is located on a second side of the first seam area SA1 (e.g., the lower side shown in the figure). The first sub-area A1, the second sub-area A2, and the first seam area SA1 are all located on a first side CM1 of the article 1 to be packaged, and in the third direction D3, the first sub-area A1 and the second sub-area A2 are adjacent to each other with respect to the first seam area SA1.

[0082] exist Figures 5A-5D During the packaging process, since the transport device 16 is located below the item to be packaged 1, the contact between the transport device and the item to be packaged 1 may affect the tightness of the packaging sheet 2 wrapping the back side of the item to be packaged 1.

[0083] For example, in order to maintain a tighter wrapping of the first sheet portion 21 on the rear side of the item to be packaged 1, different tensions are applied to the two portions of the first sheet portion 21 located on the upper and lower sides of the first seam area SA1, so that the two portions of the first sheet portion 21 located in the first sub-area A1 and the second sub-area A2 have different thicknesses.

[0084] Figure 6 This is a schematic diagram of the first sheet-like portion and the second sheet-like portion according to an embodiment of the present disclosure. Figure 6 As shown, the first sheet portion 21 includes a first sub-sheet portion 101 located in the first sub-region A1, the first sub-sheet portion 101 having a first sub-sheet thickness T101. The first sheet portion 21 also includes a second sub-sheet portion 102 located in the second sub-region A2, the second sub-sheet portion 102 having a second sub-sheet thickness T102. The second thickness T2 of the second sheet portion 22 is greater than both the first sub-sheet thickness T101 and the second sub-sheet thickness T102.

[0085] In some embodiments, the first sub-sheet thickness T101 is not equal to the second sub-sheet thickness T102. When the first sub-sheet portion 101 is subjected to a greater winding force than the second sub-sheet portion 102 during the packaging process, the first sub-sheet thickness T101 is less than the second sub-sheet thickness T102. Conversely, when the first sub-sheet portion 101 is subjected to a smaller winding force than the second sub-sheet portion 102, the first sub-sheet thickness T101 is greater than the second sub-sheet thickness T102.

[0086] In the present embodiment, as shown in FIG. 1, the first sub-sheet portion 101 is subjected to a greater winding force than the second sub-sheet portion 102, so the first sub-sheet thickness T101 is less than the second sub-sheet thickness T102. In order to avoid confusion, Figure 6 In the present embodiment, as shown in FIG. 1, the first sub-sheet portion 101 is subjected to a greater winding force than the second sub-sheet portion 102, so the first sub-sheet thickness T101 is less than the second sub-sheet thickness T102. In order to avoid confusion, Figure 6 In the present embodiment, as shown in FIG. 1, the first sub-sheet portion 101 is subjected to a greater winding force than the second sub-sheet portion 102, so the first sub-sheet thickness T101 is less than the second sub-sheet thickness T102. In order to avoid confusion, Figure 6 In the present embodiment, as shown in FIG. 1, the first sub-sheet portion 101 is subjected to a greater winding force than the second sub-sheet portion 102, so the first sub-sheet thickness T101 is less than the second sub-sheet thickness T102. In order to avoid confusion,

[0087] It should be noted that in actual production, the thickness of the first sub-sheet portion 101 and the second sub-sheet portion 102 can not be uniform, in which case the first sub-sheet thickness T101 can be understood as the average thickness of the first sub-sheet portion 101 in the first sub-region A1, and the second sub-sheet thickness T102 can be understood as the average thickness of the second sub-sheet portion 102 in the second sub-region A2.

[0088] In the present embodiment of the present disclosure, the method for measuring the average thickness of the sheet is as follows: using a film thickness gauge (for example, a Kaefer film thickness gauge F1101 / 30-0.1) to measure the thickness of multiple different positions (for example, not less than three) in the to-be-measured region of the to-be-measured sheet (for example, the first sub-sheet portion 101), and taking the average value as the average thickness. In order to ensure the accuracy of the measurement results as much as possible, the different positions are uniformly distributed (for example, equidistantly distributed) at multiple positions in the to-be-measured region.

[0089] For example, the average thickness of the first sub-sheet portion 101 in the first sub-region A1 is not equal to the average thickness of the second sub-sheet portion 102 in the second sub-region A2. Further, for example, the average thickness of the first sub-sheet portion 101 in the first sub-region A1 is less than the average thickness of the second sub-sheet portion 102 in the second sub-region A2, which can make the wrapping of the packaging sheet 2 at the first protruding edge TL1 of the to-be-packaged article 1 more compact.

[0090] Figure 7 Schematic diagram of a first sheet portion and a second sheet portion according to another embodiment of the present disclosure. As shown in FIG. 2, the first sheet portion 21 and the second sheet portion 22 are subjected to different winding forces during the packaging process.Figure 7 As shown, the first sub-sheet portion 101 includes, in the third direction D3, a first portion 201 close to the first seam area SA1 and a second portion 202 away from the first seam area SA1. When the wrapping force is the same, the first portion 201 is closer to the first seam S1 than the second portion 202, and the first seam S1 is subjected to a greater tensile force, so the thickness T201 of the first portion 201 is less than the thickness T202 of the second portion 202.

[0091] It should be noted that in actual production, the thickness of the first portion 201 and the second portion 202 can not be uniform, in which case the thickness T201 of the first portion 201 described above can be understood as the average thickness of the first portion 201 in the area close to the first seam area SA1, and the thickness T202 of the second portion 202 described above can be understood as the average thickness of the second portion 202 in the area away from the first seam area SA1 (i.e., close to the first ridge TL1).

[0092] For example, as shown in FIG. 2, the first sub-sheet portion 101 includes, in the third direction D3, a first portion 201 close to the first seam area SA1 and a second portion 202 away from the first seam area SA1. When the wrapping force is the same, the first portion 201 is closer to the first seam S1 than the second portion 202, and the first seam S1 is subjected to a greater tensile force, so the thickness T201 of the first portion 201 is less than the thickness T202 of the second portion 202. Figure 7 It should be noted that in actual production, the thickness of the first portion 201 and the second portion 202 can not be uniform, in which case the thickness T201 of the first portion 201 described above can be understood as the average thickness of the first portion 201 in the area close to the first seam area SA1, and the thickness T202 of the second portion 202 described above can be understood as the average thickness of the second portion 202 in the area away from the first seam area SA1 (i.e., close to the first ridge TL1).

[0093] For example, as shown in FIG. 2, the first sub-sheet portion 101 includes, in the third direction D3, a first portion 201 close to the first seam area SA1 and a second portion 202 away from the first seam area SA1. When the wrapping force is the same, the first portion 201 is closer to the first seam S1 than the second portion 202, and the first seam S1 is subjected to a greater tensile force, so the thickness T201 of the first portion 201 is less than the thickness T202 of the second portion 202.

[0094] Figure 7 For example, as shown in FIG. 2, the first sub-sheet portion 101 includes, in the third direction D3, a first portion 201 close to the first seam area SA1 and a second portion 202 away from the first seam area SA1. When the wrapping force is the same, the first portion 201 is closer to the first seam S1 than the second portion 202, and the first seam S1 is subjected to a greater tensile force, so the thickness T201 of the first portion 201 is less than the thickness T202 of the second portion 202.By wrapping the product 1 with the wrapping sheet 2 described above, the packaging structure can be more compactly bundled together, and even during transportation, the product can be prevented from loosening and separating, thereby improving the quality of the packaging structure.

[0095] For example, such as Figure 1 and Figure 2 As shown, the third sheet portion 23 has a third thickness T3, and the fourth sheet portion 24 has a fourth thickness T3. At least one of the third thickness T3 and the fourth thickness T4 is greater than the first thickness T1 and less than the second thickness T2. During the packaging process, each of the third sheet portion 23 and the fourth sheet portion 24 is located between the first sheet portion 21 and the second sheet portion 22. When the first sheet portion 21 experiences the maximum winding force and the second sheet portion 22 experiences the minimum winding force, the magnitude of the winding force experienced by each of the third sheet portion 23 and the fourth sheet portion 24 is between the winding force experienced by the first sheet portion 21 and the winding force experienced by the second sheet portion 22. Accordingly, the third thickness T3 is greater than the first thickness T1 and less than the second thickness T2, and / or the fourth thickness T4 is greater than the first thickness T1 and less than the second thickness T2. In this way, a more compact package can be formed for the third side CM3 and the fourth side CM4 of the article to be packaged.

[0096] In this embodiment of the disclosure, at least one of the third sheet portion 23 and the fourth sheet portion 24 has a different thickness in the second direction D2, depending on the different winding forces applied to the third sheet portion 23 and the fourth sheet portion 24.

[0097] For example, such as Figure 2 As shown, the third sheet portion 23 includes a first edge portion 301 near the first side surface CM1 and a second edge portion 302 away from the first side surface CM1 in the second direction D2. In order to ensure that the third sheet portion 23 wraps the first protruding rib TL1 more tightly, the winding force borne by the first edge portion 301 is greater than that borne by the second edge portion 302. Therefore, the thickness of the first edge portion 301 is less than the thickness of the second edge portion 302.

[0098] For example, such as Figure 2 As shown, the fourth sheet portion 24 includes a third edge portion 303 near the first side surface CM1 and a fourth edge portion 304 away from the first side surface CM2 in the second direction D2. In order to ensure that the fourth sheet portion 24 wraps the second protruding rib TL2 more tightly, the winding force borne by the third edge portion 303 is greater than that borne by the fourth edge portion 304. Therefore, the thickness of the third edge portion 303 is less than the thickness of the fourth edge portion.

[0099] For example, such as Figure 2 As shown, the item to be packaged 1 also includes a first end side DC1 and a second end side DC2 disposed opposite to each other in the first direction D1. In this embodiment, the third sheet portion 23 and / or the fourth sheet portion 24 may have different thickness distributions along the first direction D1.

[0100] As shown in FIG. 3, in the third sheet portion 23, the thickness distribution of the first edge portion 301 along the first direction D1 can be the same as or different from the thickness distribution of the second edge portion 302 along the first direction D1. For convenience, the following description is given by taking the thickness distribution of the first edge portion 301 along the first direction D1 as substantially the same as the thickness distribution of the second edge portion 302 along the first direction D1. Further, the following description is given by taking the first edge portion 301 as an example. Figure 2

[0101] As shown in FIG. 4, in the fourth sheet portion 24, the thickness distribution of the third edge portion 303 along the first direction D1 can be the same as or different from the thickness distribution of the fourth edge portion 304 along the first direction D1. For convenience, the following description is given by taking the thickness distribution of the third edge portion 303 along the first direction D1 as substantially the same as the thickness distribution of the fourth edge portion 304 along the first direction D1. Further, the following description is given by taking the fourth edge portion 304 as an example. Figure 8 Figure 2 Figure 8 As shown in FIG. 5, the fourth edge portion 304 includes, in the first direction D1, a second proximal end JD2 close to the first end side DC1, a second distal end YD2 close to the second end side DC2, and a second middle portion ZB2 located between the second proximal end JD2 and the second distal end YD2. Compared with the winding force or the pulling force borne by the second middle portion ZB2, the winding force borne by the second proximal end JD2 and the second distal end YD2 is smaller, and thus the thickness of the second proximal end JD2 and the thickness of the second distal end YD2 are both greater than the thickness of the second middle portion ZB2.

[0102] As shown in FIG. 6, in the fourth sheet portion 24, the thickness distribution of the third edge portion 303 along the first direction D1 can be the same as or different from the thickness distribution of the fourth edge portion 304 along the first direction D1. For convenience, the following description is given by taking the thickness distribution of the third edge portion 303 along the first direction D1 as substantially the same as the thickness distribution of the fourth edge portion 304 along the first direction D1. Further, the following description is given by taking the fourth edge portion 304 as an example. Figure 2

[0103] As shown in FIG. 7, the fourth edge portion 304 includes, in the first direction D1, a second proximal end JD2 close to the first end side DC1, a second distal end YD2 close to the second end side DC2, and a second middle portion ZB2 located between the second proximal end JD2 and the second distal end YD2. Compared with the winding force or the pulling force borne by the second middle portion ZB2, the winding force borne by the second proximal end JD2 and the second distal end YD2 is smaller, and thus the thickness of the second proximal end JD2 and the thickness of the second distal end YD2 are both greater than the thickness of the second middle portion ZB2. Figure 9 Figure 2 Figure 9 As shown in FIG. 8, the fourth edge portion 304 includes, in the first direction D1, a second proximal end JD2 close to the first end side DC1, a second distal end YD2 close to the second end side DC2, and a second middle portion ZB2 located between the second proximal end JD2 and the second distal end YD2. Compared with the winding force or the pulling force borne by the second middle portion ZB2, the winding force borne by the second proximal end JD2 and the second distal end YD2 is smaller, and thus the thickness of the second proximal end JD2 and the thickness of the second distal end YD2 are both greater than the thickness of the second middle portion ZB2.

[0104] In the embodiments of the present disclosure, two seams are formed on the packaging sheet when any one of the following two conditions occurs:

[0105] ​​​​The first scenario: As mentioned above, when in Figure 1 When two packaging sheets 2 are used on the upper and lower sides of the item 1 to be packaged, two seams will be formed on the packaging sheet 2.

[0106] The second scenario: Figure 5D As shown, when the first item to be packaged is cut by the cutting component 15, a weld seam is left on the packaging sheet 2. When the second item to be packaged 1 is cut according to... Figures 5A-5D After the process shown is completed, the weld seam left on the packaging sheet 2 will adhere to the front side of the second item to be packaged 1, thus forming two seams on the front and rear sides of the second item to be packaged 1 respectively.

[0107] The following explanation uses the two seams formed in the second case as an example.

[0108] Figure 10 This is a perspective view of a packaging structure provided according to another embodiment of the present disclosure. Figure 11 For along Figure 10 A schematic diagram of the section cut off from line II. (Compared to...) Figure 1 , Figure 2 The difference in the illustrated embodiments is that, Figure 10 , Figure 11 The packaging sheet shown has two seams.

[0109] like Figure 10 As shown, the packaging sheet 2 is provided with a first seam S1 and a second seam S2. For example, the second seam S2 extends in the same direction as the first seam S1, for example, the second seam S2 extends in a first direction D1.

[0110] Figure 11 For example, this is a schematic diagram of a second item to be packaged and its packaging sheet. It should be noted that... Figure 11 The position of the second seam S2 on the second side CM2 of the article to be packaged is variable, that is, the second seam S2 can be located at the upper, middle or lower part of the second side CM2, and this disclosure does not limit it.

[0111] For example, the second seam S2 extends along the length of the item 1 to be packaged. The length of the second seam S2 along the first direction D1 can be the same as or different from the length of the item 1 to be packaged along the first direction D1. When the length of the second seam S2 along the first direction D1 is different from the length of the item 1 to be packaged along the first direction D1, the length of the second seam S2 along the first direction D1 is greater than or equal to the length of the item 1 to be packaged along the first direction D1, which helps to control the winding force of the packaging sheet 2 along the entire length of the item 1 to be packaged, thereby more tightly wrapping the multiple packaging sleeves 10 in the packaging sheet 2.

[0112] For example, such asFigure 10 As shown, the second sheet portion 22 includes a second seam area SA2 and a second non-seam area NSA2, with the second seam S2 located in the second seam area SA2. Since the second seam S2 is formed in the second seam area SA2, while there is no seam in the second non-seam area NSA2, the second sheet portion 22 has different thicknesses in the second seam area SA2 and the second non-seam area NSA2.

[0113] For example, the second sheet portion 22 has a first sub-thickness T22 in the second non-seamless region NSA2, which is less than the thickness of the second sheet portion 22 in the second seam region SA2 and greater than the first thickness T1 of the first sheet portion 21 in the first non-seamless region NSA1. In this embodiment of the present disclosure, the thickness of the second sheet portion 22 in the second seam region SA2 includes the sum of the thickness of the sheet itself and the thickness of the second seam S2.

[0114] like Figure 10 As shown, the force applied to form the second joint S2 is smaller than the force applied when forming the first joint S1. Therefore, the width of the second joint S2 in the third direction D3 is smaller than the width of the first joint S1 in the third direction D3. Correspondingly, the width of the second joint area SA2 in the third direction D3 is smaller than the width of the first joint area SA1 in the third direction D3. For example, because the first joint S1 has obvious wrinkles from heat treatment, its width along the third direction D3 is 31–39 mm. The second joint S2 has no obvious wrinkles and is essentially a weld line.

[0115] For example, such as Figure 10 As shown, the second seam area SA2, having the second seam S2, extends along the first direction D1. The second non-seam area NSA2, lacking the second seam S2, also extends along the first direction D1. The second non-seam area NSA2 includes a third sub-area A3 and a fourth sub-area A4, which are located on opposite sides of the second seam area SA2 along the third direction D3. For example, the third sub-area A3 is located on the first side of the second seam area SA2 (e.g., the upper side shown in the figure), and the fourth sub-area A4 is located on the second side of the second seam area SA2 (e.g., the lower side shown in the figure). The third sub-area A3, the fourth sub-area A4, and the second seam area SA2 are all located on the second side CM2 of the article 1 to be packaged, and, along the third direction D3, the third sub-area A3 and the fourth sub-area A4 are adjacent to each other in the first seam area SA1.

[0116] For example, in order to keep the second sheet portion 22 on the front side of the item to be packaged 1 (i.e. Figure 10The second side CM2) is shown to be formed with a tighter wrapping, and different tensions are applied to two portions of the second sheet portion 22 on both sides of the second seam area SA2, so that the two portions of the second sheet portion 22 in the third sub-area A3 and the fourth sub-area A4 have different thicknesses.

[0117] Figure 12 A schematic view of a first sheet portion and a second sheet portion according to a further embodiment of the present disclosure is shown. For example, as Figure 12 shown, the second sheet portion 22 includes a third sub-sheet portion 103 in the third sub-area A3, which has a third sub-sheet thickness T103. The second sheet portion 22 also includes a fourth sub-sheet portion 104 in the fourth sub-area A4, which has a fourth sub-sheet thickness T104. The third sub-sheet thickness T103 is not equal to the fourth sub-sheet thickness T104, and both the third sub-sheet thickness T103 and the fourth sub-sheet thickness T104 are greater than the first thickness T1 of the first sheet portion 21 in the first non-seam area NSA1.

[0118] When the third sub-sheet portion 103 bears a greater wrapping force than the fourth sub-sheet portion 104 during the packaging process, the third sub-sheet thickness T103 is less than the fourth sub-sheet thickness T104. Conversely, when the third sub-sheet portion 103 bears a smaller wrapping force than the fourth sub-sheet portion 104, the third sub-sheet thickness T103 is greater than the fourth sub-sheet thickness T104.

[0119] In the present embodiment, as Figure 12 shown, the third sub-sheet portion 103 is arranged to bear a greater wrapping force than the fourth sub-sheet portion 103, which can make the wrapping of the packaging sheet 2 on the third protruding edge TL3 of the article to be packaged 1 tighter, and therefore, it is preferable that the third sub-sheet thickness T103 be less than the fourth sub-sheet thickness T104. To avoid confusion, Figure 12 only the first sheet portion 21 and the second sheet portion 22 discussed herein are shown, and the third sheet portion 23 and the fourth sheet portion 24 arranged on the article to be packaged 1 are not shown in Figure 12 .

[0120] It should be noted that in actual production, the thicknesses of the third sub-sheet portion 103 and the fourth sub-sheet portion 104 can not be uniform, in which case the above-mentioned third sub-sheet thickness T103 can be understood as the average thickness of the third sub-sheet portion 103 in the third sub-area A3, and the above-mentioned fourth sub-sheet portion 104 can be understood as the average thickness of the fourth sub-sheet portion 104 in the fourth sub-area A4.

[0121] For example, the average thickness of the third sub-sheet portion 103 in the third sub-zone A3 is not equal to the average thickness of the fourth sub-sheet portion 104 in the fourth sub-zone A4. Further, for example, the average thickness of the third sub-sheet portion 103 in the third sub-zone A3 is smaller than the average thickness of the fourth sub-sheet portion 104 in the fourth sub-zone A4, which can make the wrapping of the packaging sheet 2 tighter at the third ledge TL3 of the article 1 to be packaged.

[0122] Figure 13 Schematic view of a first sheet portion and a second sheet portion according to yet another embodiment of the disclosure. As shown, the third sub-sheet portion 103 comprises, in the third direction D3, a fifth portion 205 proximate to the second seam zone SA2 and a sixth portion 206 distal from the second seam zone SA2. When the wrapping force is the same, the sixth portion 206 deforms more than the fifth portion 205 because the sixth portion 206 is closer to the third ledge TL3 than the fifth portion 205, and thus, the thickness T206 of the sixth portion 206 is smaller than the thickness T205 of the fifth portion 205. Figure 13

[0123] It is to be noted that in actual production, the thickness of the fifth portion 205 and the sixth portion 206 can not be uniform, in which case the thickness T205 of the fifth portion 205 can be understood as the average thickness of the fifth portion 205 in the region proximate to the second seam zone SA2, and the thickness T206 of the sixth portion 206 can be understood as the average thickness of the sixth portion 206 in the region distal from the second seam zone SA2, i.e. proximate to the third ledge TL3.

[0124] For example, as shown in FIG. 6, the fourth sub-sheet portion 104 comprises, in the third direction D3, a seventh portion 207 proximate to the second seam zone SA2 and an eighth portion 208 distal from the second seam zone SA2. When the wrapping force is the same, the eighth portion 208 deforms more than the seventh portion 207 because the eighth portion 208 is closer to the fourth ledge TL4 of the article 1 to be packaged than the seventh portion 207, and thus, the thickness T208 of the eighth portion 208 is smaller than the thickness T207 of the seventh portion 207. Figure 13

[0125] It is to be noted that in actual production, the thickness of the seventh portion 207 and the eighth portion 208 can not be uniform, in which case the thickness T207 of the seventh portion 207 can be understood as the average thickness of the seventh portion 207 in the region proximate to the second seam zone SA2, and the thickness T208 of the eighth portion 208 can be understood as the average thickness of the eighth portion 208 in the region distal from the second seam zone SA2, i.e. proximate to the fourth ledge TL4.

[0126] For example, as shown in FIG. 6, the fourth sub-sheet portion 104 comprises, in the third direction D3, a seventh portion 207 proximate to the second seam zone SA2 and an eighth portion 208 distal from the second seam zone SA2. When the wrapping force is the same, the eighth portion 208 deforms more than the seventh portion 207 because the eighth portion 208 is closer to the fourth ledge TL4 of the article 1 to be packaged than the seventh portion 207, and thus, the thickness T208 of the eighth portion 208 is smaller than the thickness T207 of the seventh portion 207. Figure 13 ​​As shown, according to the difference in the winding force borne by the first sheet portion 21 and the second sheet portion 22, the seventh thickness T207 of the seventh portion 207 is greater than the thickness T208 of the eighth portion 208, the thickness T208 of the eighth portion 208 is greater than the thickness T205 of the fifth portion 205, the thickness T205 of the fifth portion 205 is greater than the thickness T206 of the sixth portion 206, and the thickness T206 of the sixth portion 206 is greater than the first thickness T1 of the first sheet portion 22 in the first non-seam zone NSA1. By adopting the above packaging sheet 2 to wind the articles 1 to be packaged, the packaging structure can be more compactly bundled together, and the loosening and separation of the products can be avoided even during transportation, thereby improving the quality of the packaging structure.

[0127] In the embodiments of the present disclosure, although the thickness distribution of the first sheet portion 21 and the second sheet portion 22 is described separately in different embodiments, these embodiments can be combined with each other. For example, the first sheet portion having the thickness distribution features shown in Figure 2 、 Figure 6 、 Figure 7 may be combined into the packaging structure shown in Figure 11 、 Figure 12 、 Figure 13 respectively.

[0128] In the embodiments of the present disclosure, the material of the packaging sheet is provided with stretch characteristics and / or shrink characteristics. For example, a stretch film or a shrink film made of PE. The advantage of the stretch film is that it is highly flexible and can therefore withstand a large amount of stress. Thus, the sheet material can withstand the elongation caused by conveying the packaging sleeve set through the sheet material without being damaged. The packaging structure made of the packaging sleeve and the stretch film is characterized by having a strong cohesion, because after the layer is formed around the packaging sleeve set, the stretch film exerts pressure on the packaging sleeve set, thereby ensuring a compact and stable packaging structure.

[0129] In at least some embodiments, a detectable marker can also be provided on the packaging sheet, so that the degree of stretching and / or shrinking of the packaging sheet during the packaging process can be detected, and according to the detection result, the winding force applied to the packaging sheet during the packaging process is adjusted to achieve a better packaging effect.

[0130] For example, the detectable marker can be provided on at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion. The detectable marker includes a plurality of detectable patterns arranged along the stretchable direction of the packaging sheet and configured to determine the deformation amount of at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion when stretching and / or shrinking occurs along the stretchable direction.

[0131] By setting the detectable markers on at least one sheet portion of the packaging sheet, the deformation amount of the at least one sheet portion in the stretchable direction during the packaging process can be detected, so as to determine the winding force borne by the at least one sheet portion during the packaging process. In this way, when the packaging effect of the packaging structure is not ideal, the winding force during the packaging process can be adjusted according to the detection result, so as to further avoid the problem of deformation of the packaging sleeve and improve the quality of the packaging structure.

[0132] For example, as shown in Figure 1 The detectable markers 4 are set on at least two sheet portions of the first sheet portion 21, the second sheet portion 22, the third sheet portion 23 and the fourth sheet portion 24, such as the second sheet portion 22 and the third sheet portion 23. The stretchable direction includes at least one of the first direction D1, the second direction D2 and the third direction D3.

[0133] The detectable markers 4 include a first detectable marker 41 located on the third sheet portion 23 and a second detectable marker 42 located on the second sheet portion 22. In the embodiment of the present disclosure, the first detectable marker and the second detectable marker set on different sheet portions can have the same detectable pattern or different detectable patterns. When the same detectable pattern is used, the deformation amount of the packaging sheet can be determined by the same detection standard, so that the detection result is more uniform and accurate. Moreover, when the same detectable pattern is made on the packaging sheet, the manufacturing process can be simplified, and therefore is preferred.

[0134] In the embodiment of the present disclosure, the detectable pattern includes a visible pattern or an invisible pattern. For example, the visible pattern includes at least one of a dot pattern, a line pattern and a surface pattern. For example, the invisible pattern includes a sensing pattern buried in the packaging sheet, which can be sensed by electricity, magnetism, sound, etc. Since the visible pattern is more intuitive and easy to be observed by the human eye, the visible pattern will be taken as an example for description below.

[0135] For example, as shown in Figure 1 The first detectable marker 41 is set on the third sheet portion 23 and includes a plurality of first detectable patterns 401 arranged along the second direction D2. The second detectable marker 42 is set on the second sheet portion 22 and includes a plurality of second detectable patterns 402 arranged along the third direction D3.

[0136] For example, the first detectable patterns 401 and the second detectable patterns 402 are both line patterns observable by the human eye, such as straight lines or line segments. Each first detectable pattern 401 extends along the first direction D1, and each second detectable pattern 402 extends along the first direction D1. That is, the first detectable patterns 401 and the second detectable patterns 402 are parallel to each other.

[0137] In this embodiment of the disclosure, the plurality of first detectable patterns 401 and the plurality of second detectable patterns 402 can be arranged in a manner with equal or unequal spacing. For example, as Figure 1 As shown, multiple first detectable patterns 401 are arranged at equal intervals with a first distance, and multiple second detectable patterns 402 are arranged at equal intervals with a second distance.

[0138] During detection, a detector (e.g., a ruler) is used to measure the distance between two adjacent first detectable patterns 401, and this distance is compared with a first distance. Based on the comparison result, the deformation of the third sheet portion 23 in the second direction D2 can be determined. When the measured distance is greater than the first distance, it can be determined that the third sheet portion 23 is stretched in the second direction D2; when the measured distance is smaller than the first distance, it can be determined that the third sheet portion 23 is contracted in the second direction D2. In this way, the magnitude of the deformation of the third sheet portion 23 in the second direction D2 can be quickly determined. The detection method of the second detectable pattern 402 is the same as that of the first detectable pattern 401, and will not be described again here.

[0139] For example, the length of the first detectable pattern 401 along the first direction D1 is equal to the length of the item 1 to be packaged along the first direction D1, and the length of the second detectable pattern 402 along the first direction D1 is also equal to the length of the item 1 to be packaged along the first direction D1. By detecting the deformation of the packaging sheet at multiple positions along the first direction D1, the distribution of the winding force applied at different positions can be obtained more accurately, thereby helping to further improve the packaging effect of the packaging sheet.

[0140] Figure 14 for Figure 1 A schematic diagram showing the unfolded second and third packaging sheets. (See diagram below.) Figure 14 The plurality of first detectable patterns 401a, 401b, and 401c are arranged at equal intervals with a first distance L1, and the plurality of second detectable patterns 402a, 402b, and 402c are arranged at equal intervals with a second distance L2. The distance between the first detectable pattern 401c closest to the second detectable pattern 402 among the plurality of first detectable patterns 401a, 401b, and 401c and the second detectable pattern 402a closest to the first detectable pattern 401 among the plurality of second detectable patterns 402a, 402b, and 402c is a third distance L3, wherein the first distance L1, the second distance L2, and the third distance L3 are all equal to each other.

[0141] When detecting deformation, the deformation of the packaging sheet 2 at the third protrusion TL3 can be detected by comparing the spacing between the first detectable pattern 401a and the second detectable pattern 402a with the third distance L3. Furthermore, by setting the first distance L1, the second distance L2, and the third distance L3 to be equal to each other, the deformation of the packaging sheet 2 can be determined using the same detection standard, thus resulting in more consistent and accurate detection results. Moreover, this simplifies the manufacturing process when multiple equally spaced detectable patterns are fabricated onto the packaging sheet, making this a preferred method.

[0142] Figure 1 The detectable marker 4 is disposed on the second sheet portion 22 and the third sheet portion 23. It is understood that the detectable marker 4 can also be disposed on, for example, the first sheet portion 21 and the fourth sheet portion 24. Alternatively, the detectable marker 4 can be disposed on the first sheet portion 21, the second sheet portion 22, and the third sheet portion 23. Alternatively, the detectable marker 4 can be disposed on each of the first sheet portion 21, the second sheet portion 22, the third sheet portion 23, and the fourth sheet portion 24.

[0143] In the above embodiments, by detecting changes in the spacing between the plurality of detectable patterns 401, the amount of stretching / extension of the third sheet portion 23 in the second direction can be determined, and the winding force applied to the third sheet portion 23 can be adjusted according to the determined amount of stretching / extension. Similarly, by detecting changes in the spacing between the plurality of detectable patterns 402, the winding force applied to the second sheet portion 22 can be adjusted. This further optimizes the packaging effect of the packaging structure.

[0144] Figure 15 This is a perspective view of a packaging structure provided according to another embodiment of the present disclosure. Figure 15 As shown, the detectable marker 5 is disposed on at least two adjacent sheet portions among the first sheet portion 21, the second sheet portion 22, the third sheet portion 23 and the fourth sheet portion 24, for example disposed on the second sheet portion 22 and the third sheet portion 23.

[0145] The detectable marker 5 comprises a plurality of detectable patterns 50 arranged along the first direction D1. Each detectable pattern 50 can extend across the second sheet portion 22 and the third sheet portion 23. For example, the detectable pattern 50 adopts a line pattern, such as a straight line or a line segment. Each detectable pattern 5 comprises a first detectable portion 501 and a second detectable portion 502. The first detectable portion 501 and the second detectable portion 502 are respectively provided on the second sheet portion 22 and the third sheet portion 23. The first detectable portion 501 extends along the second direction D2. The second detectable portion 502 is connected to the first detectable portion 501 and extends along the third direction D3.

[0146] By detecting the length change of each detectable pattern 50, the amount of stretching and / or expansion of the third sheet portion 23 and the second sheet portion 22 in the circumferential direction can be determined, and the winding force applied to the third sheet portion 23 and the second sheet portion 22 is adjusted according to the determined amount of stretching and / or expansion. In this way, the packaging effect of the packaging structure is more optimized.

[0147] In the embodiments of the present disclosure, the material of the packaging sheet 2 is formed by a plastic film. For example, the organic film includes but is not limited to polyethylene (PE), polyvinylidene chloride PVDC, PMP, etc. For example, the PE film is preferred, which realizes a packaging structure that is lighter and smaller in size.

[0148] In the embodiments of the present disclosure, the thickness of the packaging sheet 2 is 15 μm to 45 μm, preferably 25 μm to 40 μm, and more preferably 35 μm. If the thickness is less than 15 μm, the following effects will occur: 1) the product is easy to pierce the packaging film, 2) the weld on the back side of the product is easy to fail, because the sealing temperature is not easy to control due to the too thin thickness, and a slightly high temperature will cause the structure at the weld to be fragile, and a slightly low temperature will cause the weld to be not tightly sealed, 3) the mechanical strength of the packaging film itself is not enough.

[0149] Figure 16 A perspective view of a packaging structure according to still another embodiment of the present disclosure is provided. Compared with the packaging structure shown in Figure 1 , the packaging structure shown in Figure 16 differs in that the detectable marker is provided in a manner different from the detectable marker shown in Figure 1 , and in addition, Figure 16 the packaging sheet shown in Figure 16 further comprises a second seam S2. Figure 10 The manner of providing the second seam S2 in Figure 16 may be referred to the description in , which will not be described herein again. In order to avoid confusion with the detectable pattern,

[0150] the first seam S1 in Figure 1 is shown in a thick dashed line. Figure 16The packaging structure also includes a packaging article 1 and a packaging sheet 2 surrounding the packaging article 1. As shown in Figure 16 The detectable marks on the packaging sheet 2 include a plurality of detectable patterns X1-X6, Y1-Y6 arranged on each sheet portion. Each detectable pattern is linear and extends along the first direction D1, and the plurality of detectable patterns X1-X6, Y1-Y6 are parallel to each other. The plurality of detectable patterns X1-X6, Y1-Y6 are arranged at equal intervals, and the interval can be set according to the size of the packaging sleeve. For example, the interval can be 10-80 mm. In this embodiment, the interval is set to 31 mm.

[0151] For example, the size of the packaging article 1 in the first direction D1 is related to the number of stacks of the packaging sleeve 10 in the packaging sheet 2. For example, the size is 80-120 cm; the size in the second direction D2 is related to the cross section of the packaging sleeve 10, for example, the size is 70-190 mm, which can be about 79.5 mm, 88 mm, 103 mm, 123.5 mm, 131 mm, 142 mm, 149 mm, 158 mm, 165 mm, 188 mm, etc.; the size of the packaging article 1 in the third direction D3 is the height of the packaging sleeve 10, for example, the size is 56.5-239 mm. In this embodiment, the sizes of the packaging article 1 in the D1, D2 and D3 directions are 90-110 cm, 79.5 mm and 122.5 mm, respectively.

[0152] After the packaging article 1 is packaged with the packaging sheet 2 shown in Figure 16 The interval of the plurality of detectable patterns X1-X6, Y1-Y6 is detected again after the packaging article 1 is packaged with the packaging sheet 2 shown in

[0153] It can be understood that the number and interval of the above-mentioned detection points are only illustrative, and other numbers of detection points and intervals can be selected according to the size of the actual product and the requirements of detection. For example, the number of detection points can be two or more than three.

[0154] Table 1

[0155]

[0156] Table 2

[0157]

[0158] As can be seen from Table 1 and Table 2, the average distances between the detectable patterns X6, Yl and Y2 located on the rear side of the article 1 (i.e. the side where the first seam S1 is located) are 44 mm, 40 mm and 42 mm respectively, all of which are greater than or equal to 40 mm. Compared with other detectable patterns, the deformation of these three detectable patterns is relatively large. In combination with the fact that Figure 1 and Figure 2 it can be known that the detectable patterns X6, Yl and Y2 are located on the first sheet portion 21 of the rear side of the article 1, thus indicating that the deformation (here, the stretching amount) of the first sheet portion 21 is relatively large, and the first sheet portion 21 bears a relatively large winding force during the packaging process.

[0159] As can be seen from Table 1 and Table 2, the average distances between the detectable patterns Xl, X2, Y5 and Y6 located on the front side of the article 1 (i.e. the side where the second seam S2 is located) are 33 mm, 33 mm, 33 mm and 32 mm respectively, all of which are relatively small compared with other detectable patterns. In combination with the fact that Figure 1 and Figure 2 it can be known that the detectable patterns Xl, X2, Y5 and Y6 are located on the second sheet portion 22 of the front side of the article 1, thus indicating that the deformation of the second sheet portion 22 is relatively small, and the second sheet portion 22 bears a relatively small winding force during the packaging process.

[0160] As can be calculated from Table 1 and Table 2, the deformation of the first sheet portion 21 is 9-13 mm, and the deformation of the second sheet portion 22 is 1-2 mm. Here, the deformation = the measured distance - 31 mm. It can be further calculated that the ratio of the deformation of the first sheet portion 21 to the deformation of the second sheet portion 22 is 4.5-13.

[0161] In this embodiment, the thickness of the packaging sheet 2 is about 35 μm before packaging. After the packaging sheet 2 shown in Fig. 2 is used to package the article 1, the thickness of the packaging sheet 2 is also re-detected. Figure 16

[0162] The instrument used for the detection is a Kaefer film thickness gauge F1101 / 30-0.1 (graduation value 0.001 mm). The detection process is as follows: the packaging sheet is cut along the first seam S1, the thickness is measured at the edge position, the thickness is measured at the position without wrinkles, after the measurement is completed, the measured area is cut off, and the other parts are continuously detected. The detection results are shown in Table 3 and Table 4.

[0163] Table 3

[0164]

[0165] Table 4

[0166] ​

[0167] As shown in Tables 3 and 4, the average film thicknesses of the first sheet portion 21 located at the positions of detectable patterns X6, Y1, and Y2 are 29.9 μm, 30.3 μm, and 30 μm, respectively. The average film thicknesses of the second sheet portion 22 located at the positions of detectable patterns X1, X2, Y5, and Y6 are 35.4 μm, 35.5 μm, 34 μm, and 34.3 μm, respectively. Therefore, the film thickness of the second sheet portion 22 is greater than that of the first sheet portion 21. This is consistent with the deformation results reflected in Tables 1 and 2.

[0168] From Tables 3 and 4, we can obtain the film thickness of the second sheet portion 22 (i.e., Figure 2 The second thickness (T2) is 34–35.5 μm, and the film thickness of the first sheet portion 21 (i.e. Figure 1 The first thickness T1 is 29.9–30.3 μm. Calculations show that the ratio of the second thickness T2 to the first thickness T1 ranges from 1.12 to 1.19.

[0169] At least one embodiment of this disclosure also provides a packaging method. Figure 17 This is a flowchart of a packaging method provided according to an embodiment of the present disclosure. Figure 17 As shown, the packaging method includes:

[0170] S101: Use packaging sheet to wrap the item to be packaged.

[0171] For example, such as Figure 1 and Figure 2 As shown, the item to be packaged 1 includes multiple packaging sleeves 10, which are stacked along a first direction D1 to give the item to be packaged multiple sides, each side extending along the first direction D1. A packaging sheet 2 is provided with a first seam S1 extending along the first direction 10. The packaging sheet 2 includes a first sheet portion 21 and a second sheet portion 22. The first sheet portion 21 is located on a first side CM1 among the multiple sides of the item to be packaged 1. The first sheet portion 21 includes a first seam area SA1 and a first non-seam area NSA1, with the first seam S1 located in the first seam area SA1. The thickness of the first sheet portion 21 differs in the first seam area SA1 and the first non-seam area NSA1. The second sheet portion 22 is located on a second side CM2 among the multiple sides of the item to be packaged 1, and the second side CM2 is opposite to the first side CM1 in a second direction D2 perpendicular to the first direction D1. The first sheet portion 21 has a first thickness T1 in the first non-seamless area NSA1, and the second sheet portion 22 has a second thickness T2, wherein the second thickness T2 is greater than the first thickness T1.

[0172] In the packaging method provided by the above-mentioned embodiments of the present disclosure, since the wrapping force on the first side CM1 of the packaging sheet 2 is larger, and the wrapping force on the second side CM2 is smaller, the second thickness T2 of the second sheet portion 22 located on the second side CM2 is greater than the first thickness T1 of the first sheet portion 21 in the first non-seam area NSA1 located on the first side CM1, thereby avoiding the deformation problem of the packaging sleeve 10, and facilitating the subsequent filling process.

[0173] In the packaging method provided by the above-mentioned embodiments of the present disclosure, the structure, arrangement, size and material of the to-be-packaged article 1 and the packaging sheet 2 can refer to the description of the previous embodiments, which will not be repeated here.

[0174] For example, as shown in Figure 17 Before the packaging sheet is wrapped around the to-be-packaged article, the above-mentioned packaging method further comprises:

[0175] S100: Forming a detectable marker on at least one of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion of the packaging sheet.

[0176] Further, for example, the S100 comprises: forming a detectable marker on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion and the fourth sheet portion.

[0177] For example, as shown in Figure 2 The detectable marker 4 is formed on the second sheet portion 22 and the third sheet portion 23 of the packaging sheet 2. The detectable marker 4 comprises a first detectable marker 41 located on the third sheet portion 23 and a second detectable marker 42 located on the second sheet portion 22. The arrangement of the detectable marker 4, the first detectable marker 41 and the second detectable marker 42 can refer to the description of the previous embodiments, which will not be repeated here.

[0178] For example, as shown in Figure 14 The first detectable marker 41 comprises a plurality of first detectable patterns 401a, 401b, 401c arranged at a first distance L1, and the second detectable marker 42 comprises a plurality of second detectable patterns 402a, 402b, 402c arranged at a second distance L2. The distance between the first detectable pattern 401c closest to the second detectable pattern 402 of the plurality of first detectable patterns 401a, 401b, 401c and the second detectable pattern 402a closest to the first detectable pattern 401 of the plurality of second detectable patterns 402a, 402b, 402c is a third distance L3, wherein the first distance L1, the second distance L2 and the third distance L3 are equal to each other.

[0179] For example, such as Figure 17 As shown, after wrapping the item to be packaged with packaging sheet, the above packaging method further includes:

[0180] S102: Re-inspect the first, second, and third distances, and based on the inspection results, determine the deformation of the packaging sheet in the second and third directions, respectively; and

[0181] S103: Adjust the tension of the packaging sheet when it surrounds the item to be packaged, based on the deformation of the packaging sheet in the second and third directions.

[0182] For example, taking the first distance as an example. During detection, a detector (e.g., a ruler) is used to measure the distance between two adjacent first detectable patterns 401a and 401b, and this distance is compared with the first distance L1. Based on the comparison result, the deformation of the third sheet portion 23 in the second direction D2 can be determined. When the measured distance is greater than the first distance L1, it can be determined that the third sheet portion 23 is stretched in the second direction D2; when the measured distance is smaller than the first distance, it can be determined that the third sheet portion 23 is contracted in the second direction D2. In this way, the magnitude of the deformation of the third sheet portion 23 in the second direction D2 can be quickly determined.

[0183] Furthermore, based on the magnitude of the aforementioned deformation, the winding force borne by the packaging sheet 2 during the packaging process is adjusted. For example, if a smaller deformation of the third sheet is desired, the winding force borne by the third sheet can be reduced. If a larger deformation of the third sheet is desired, the winding force borne by the third sheet can be increased. In this way, by adjusting the winding force borne by each sheet section, a better packaging effect can be achieved, avoiding problems such as packaging sleeve deformation.

[0184] Figure 18 This is a structural block diagram of the packaging equipment provided in an embodiment of this disclosure. Figure 18 As shown, at least one embodiment of the packaging equipment provided in this disclosure includes a processing device, which is used to perform the packaging method described in any of the preceding embodiments, for example, to perform... Figure 17 Packaging methods.

[0185] In the packaging equipment provided in the above-described embodiments, by performing the packaging method described in any of the preceding embodiments, not only is the deformation of the packaging sleeve located inside the packaging sheet avoided, ensuring the quality of the packaging sleeve, but it also facilitates the subsequent filling process.

[0186] like Figure 18As shown, the packaging apparatus can further include a packaging machine, which is in signal connection with the processing device, and signal transmission can be achieved therebetween, and the transmission mode can include wired transmission mode or wireless transmission mode.

[0187] Further, for example, the packaging machine can include a conveying device (for example Figure 5A the conveying device 16 shown) and a sealing device. The sealing device, for example, includes a braking unit (for example Figure 5B the brake 13 shown), a sealing unit (for example Figure 5C a stack of sealing assemblies 14a, 14b shown), a cutting unit (for example Figure 5D the cutting assembly 15 shown), and the like.

[0188] In a specific implementation, the processing device can send signal instructions to the packaging machine, and the packaging machine can perform various actions according to the received signal instructions. For example, when the processing device sends a conveying signal, as Figure 5B shown, the conveying device 16 conveys the to-be-packaged article 1 in a conveying direction (for example, the second direction D2). When the processing device sends a sealing signal, as Figure 5C shown, the sealing assemblies 14a, 14b seal the packaging sheet by, for example, welding or bonding.

[0189] For example, the packaging apparatus can further include a storage, wherein the storage stores computer executable code, and the computer executable code, when executed by the processor, performs the packaging method described in any one of the preceding embodiments.

[0190] Figure 19 A structural schematic diagram of an apparatus for implementing a packaging method provided by the embodiments of the present disclosure is shown. The apparatus 400 can be a terminal device such as a personal computer, a notebook computer, a tablet computer, a mobile phone, etc., or a workstation, a server, a cloud service, etc. It should be noted that, Figure 19 The apparatus 400 shown is merely an example, which does not bring any limitation to the functions and use range of the embodiments of the present disclosure.

[0191] As Figure 19 shown, the apparatus 400 can include a processing device (for example, a processor, a central processing unit, a graphics processing unit, etc.) 410, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 420 or loaded from a storage device 480 to a random access memory (RAM) 430. In the RAM 430, various programs and data required for the operation of the apparatus 400 are also stored. The processing device 410, the ROM 420, and the RAM 430 are connected to each other through a bus 440. An input / output (I / O) interface 450 is also connected to the bus 440.

[0192] Typically, the following devices can be connected to I / O interface 450: input devices 460 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 470 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 480 including, for example, magnetic tapes, hard disks, etc.; and communication devices 490. Communication device 490 allows device 400 to communicate wirelessly or wiredly with other electronic devices to exchange data. Although Figure 19 The device 400 is shown, which includes various means, but it should be understood that it is not required to implement or have all the means shown, and the device 400 may alternatively implement or have more or fewer means.

[0193] For example, according to embodiments of this disclosure, the packaging method described above can be implemented as a computer software program. For instance, embodiments of this disclosure include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program including program code for performing the packaging method described above. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 490, or installed from a storage device 480, or installed from a ROM 420. When the computer program is executed by the processing device 410, it can perform the functions defined in the packaging method provided by embodiments of this disclosure.

[0194] At least one embodiment of this disclosure provides a computer-readable storage medium having executable code stored thereon, which, when executed by a processor, causes the processor to perform the packaging method described in any of the preceding embodiments.

[0195] Figure 20 This is a schematic diagram of a storage medium provided according to an embodiment of the present disclosure. Figure 20 As shown, the storage medium 500 non-transitory stores computer program executable code 501. For example, when the computer program executable code 501 is executed by a computer, one or more steps in the packaging method described above can be performed.

[0196] For example, the storage medium 500 can be used in the aforementioned device 400. For example, the storage medium 500 can be... Figure 19 The memory 420 in the device 400 shown. For example, a description of the storage medium 500 can be found here. Figure 19 The corresponding description of the memory 420 in the device 400 shown will not be repeated here.

[0197] In addition to the above description, the following points need to be noted:

[0198] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0199] (2) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined to obtain new embodiments.

[0200] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A packaging structure comprising: a to-be-packaged article comprising a plurality of packaging sleeves stacked along a first direction such that the to-be-packaged article has a plurality of sides each extending along the first direction; and a packaging sheet surrounding the to-be-packaged article, the packaging sheet being provided with a first seam extending along the first direction, the packaging sheet comprising: a first sheet portion located on a first side of the plurality of sides of the to-be-packaged article, the first sheet portion comprising a first seam region and a first non-seam region, the first seam being located in the first seam region, a thickness of the first sheet portion being different in the first seam region and the first non-seam region; a second sheet portion located on a second side of the plurality of sides of the to-be-packaged article, the second side being oppositely located to the first side in a second direction perpendicular to the first direction; wherein the first sheet portion has a first thickness in the first non-seam region, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness.

2. The packaging structure according to claim 1, wherein: the first seam region and the first non-seam region each extend along the first direction; the first non-seam region comprises a first sub-region and a second sub-region, the first sub-region and the second sub-region being located on opposite sides of the first seam region in a third direction perpendicular to both the first direction and the second direction; wherein the first sheet portion comprises: a first sub-sheet portion located in the first sub-region, the first sub-sheet portion having a first sub-sheet thickness; a second sub-sheet portion located in the second sub-region, the second sub-sheet portion having a second sub-sheet thickness; wherein the first sub-sheet thickness and the second sub-sheet thickness are not equal, and the second thickness is greater than both the first sub-sheet thickness and the second sub-sheet thickness.

3. The packaging structure according to claim 2, wherein: the first sub-sheet portion comprises, in the third direction, a first portion proximate to the first seam region and a second portion distal to the first seam region, a thickness of the first portion being less than a thickness of the second portion; and / or the second sub-sheet portion comprises, in the third direction, a third portion proximate to the first seam region and a fourth portion distal to the first seam region, a thickness of the third portion being less than a thickness of the fourth portion.

4. The packaging structure according to claim 1, wherein: the packaging sheet is further provided with a second seam extending along the first direction; the second sheet portion comprises a second seam region and a second non-seam region, the second seam being located in the second seam region, a thickness of the second sheet portion being different in the second seam region and the second non-seam region; the second sheet portion has a first sub-thickness in the second non-seam region; wherein the first sub-thickness is less than a thickness of the second sheet portion in the second seam region and greater than the first thickness of the first sheet portion in the first non-seam region. ​ 5. The packaging structure of claim 4, wherein, the second seam region and the second non-seam region both extend along the first direction, the second non-seam region includes a third sub-region and a fourth sub-region; the third sub-region and the fourth sub-region are located on opposite sides of the second seam region along a third direction, the third direction is perpendicular to both the first direction and the second direction; wherein the second sheet portion includes: a third sub-sheet portion located in the third sub-region, the third sub-sheet portion has a third sub-sheet thickness; a fourth sub-sheet portion located in the fourth sub-region, the fourth sub-sheet portion has a fourth sub-sheet thickness; wherein the third sub-sheet thickness and the fourth sub-sheet thickness are not equal, and both the third sub-sheet thickness and the fourth sub-sheet thickness are greater than the first thickness of the first sheet portion in the first non-seam region.

6. The packaging structure of claim 5, wherein, the third sub-sheet portion includes, in the third direction, a fifth portion proximate to the second seam region and a sixth portion distal to the second seam region, the fifth portion has a greater thickness than the sixth portion; and / or the fourth sub-sheet portion includes, in the third direction, a seventh portion proximate to the second seam region and an eighth portion distal to the second seam region, the seventh portion has a greater thickness than the eighth portion.

7. The packaging structure of claim 1, wherein, a ratio of the second thickness to the first thickness is in a range of 1.12 to 1.19, and a ratio of a deformation amount of the first sheet portion to a deformation amount of the second sheet portion is in a range of 4.5 to 13.

8. The packaging structure of claim 1, wherein, the packaging sheet further includes: a third sheet portion located on a third side of the plurality of sides of the article to be packaged, the third side is located between the first side and the second side in the second direction; a fourth sheet portion located on a fourth side of the plurality of sides of the article to be packaged, the fourth side is located opposite to the third side in a third direction, the third direction is perpendicular to both the first direction and the second direction; wherein the third sheet portion has a third thickness, the fourth sheet portion has a fourth thickness, at least one of the third thickness and the fourth thickness is greater than the first thickness and less than the second thickness.

9. The packaging structure of claim 8, wherein, the third sheet portion includes, in the second direction, a first edge portion proximate to the first side and a second edge portion distal to the first side, the first edge portion has a smaller thickness than the second edge portion; and / or the fourth sheet portion includes, in the second direction, a third edge portion proximate to the first side and a fourth edge portion distal to the first side, the third edge portion has a smaller thickness than the fourth edge portion.

10. The packaging structure of claim 9, wherein, The article to be packaged further comprises a first end side and a second end side oppositely arranged in the first direction; At least one of the first edge portion and the second edge portion comprises a first proximal end proximate to the first end side, a first distal end proximate to the second end side, and a first middle portion between the first proximal end and the first distal end in the first direction; At least one of the third edge portion and the fourth edge portion comprises a second proximal end proximate to the first end side, a second distal end proximate to the second end side, and a second middle portion between the second proximal end and the second distal end in the first direction; wherein the thickness of the first proximal end and the thickness of the first distal end are both greater than the thickness of the first middle portion; and / or the thickness of the second proximal end and the thickness of the second distal end are both greater than the thickness of the second middle portion.

11. The packaging structure according to any one of claims 1 to 10, wherein, the material of the packaging sheet is arranged to have stretch properties and / or shrink properties; the packaging sheet further comprises: a detectable marker arranged on at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, the detectable marker comprising: a plurality of detectable patterns arranged along a stretchable direction of the packaging sheet and configured to determine an amount of deformation of the at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion when stretched or shrunk along the stretchable direction, wherein the stretchable direction comprises at least one of the first direction, the second direction, and a third direction perpendicular to the first direction and the second direction.

12. The packaging structure according to claim 11, wherein, the detectable marker is arranged on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, the detectable marker comprises: a first detectable marker arranged on one of the at least two adjacent sheet portions and comprising a plurality of first detectable patterns arranged along the second direction, the plurality of first detectable patterns extending along the first direction; a second detectable marker arranged on the other of the at least two adjacent sheet portions and comprising a plurality of second detectable patterns arranged along the third direction, the plurality of second detectable patterns extending along the first direction.

13. The packaging structure according to claim 11, wherein, the detectable marker is arranged on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, the plurality of detectable patterns are arranged along the first direction, each detectable pattern comprising: a first detectable portion extending along the second direction; a second detectable portion connected to the first detectable portion and extending along the third direction, The first detectable portion and the second detectable portion are respectively arranged on the at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion.

14. The packaging structure of claim 11, wherein, The detectable pattern comprises a visible pattern or an invisible pattern, the visible pattern comprising at least one of a dot pattern, a line pattern, and a surface pattern.

15. The packaging structure according to any one of claims 1 to 10, wherein, Each of the packaging sleeves comprises two openings, the opening directions of the two openings being perpendicular to the first seam.

16. A packaging method, comprising: surrounding an article to be packaged with a packaging sheet, wherein the article to be packaged comprises a plurality of packaging sleeves stacked along a first direction such that the article to be packaged has a plurality of sides, each of the sides extending along the first direction, the packaging sheet being provided with a first seam extending along the first direction, the packaging sheet comprising: a first sheet portion located on a first side of the plurality of sides of the article to be packaged, the first sheet portion comprising a first seam region and a first non-seam region, the first seam being located in the first seam region, the thickness of the first sheet portion being different in the first seam region and the first non-seam region; and a second sheet portion located on a second side of the plurality of sides of the article to be packaged, the second side being oppositely arranged to the first side in a second direction perpendicular to the first direction; wherein the first sheet portion has a first thickness in the first non-seam region, the second sheet portion has a second thickness, and the second thickness is greater than the first thickness.

17. The packaging method of claim 16, wherein, the packaging sheet further comprises: a third sheet portion located on a third side of the plurality of sides of the article to be packaged, the third side being located between the first side and the second side in the second direction; and a fourth sheet portion located on a fourth side of the plurality of sides of the article to be packaged, the fourth side being oppositely arranged to the third side in a third direction perpendicular to the first direction and the second direction, before surrounding the article to be packaged with the packaging sheet, the packaging method further comprises: forming a detectable marker on at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion of the packaging sheet, wherein the detectable marker comprises: a plurality of detectable patterns arranged along a stretchable direction of the packaging sheet and configured to determine a deformation amount of the at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion when stretching or shrinking occurs along the stretchable direction.

18. The packaging method of claim 17, wherein, forming a detectable marker on the at least one of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion of the packaging sheet comprises: forming a detectable marker on at least two adjacent sheet portions of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion, wherein the detectable marker comprises: a first detectable marker disposed on one of the at least two adjacent sheet portions and comprising a plurality of first detectable patterns disposed along the second direction, the plurality of first detectable patterns extending along the first direction and the plurality of first detectable patterns being equally spaced at a first distance; and a second detectable marker disposed on the other of the at least two adjacent sheet portions and comprising a plurality of second detectable patterns disposed along the third direction, the plurality of second detectable patterns extending along the first direction and the plurality of second detectable patterns being equally spaced at a second distance, wherein a distance between a first detectable pattern of the plurality of first detectable patterns closest to the second detectable pattern and a second detectable pattern of the plurality of second detectable patterns closest to the first detectable pattern is a third distance, wherein the first distance, the second distance, and the third distance are equal.

19. The packaging method of claim 18, wherein, after the packaging sheet is wrapped around the article to be packaged, the packaging method further comprises: re-detecting the first distance, the second distance, and the third distance, and determining an amount of deformation of the packaging sheet in the second direction and the third direction, respectively, according to a result of the re-detecting; adjusting a degree of tension of the packaging sheet when being wrapped around the article to be packaged according to the amount of deformation of the packaging sheet in the second direction and the third direction.

20. The packaging method of claim 19, wherein, a ratio of the amount of deformation of the first sheet portion to the amount of deformation of the second sheet portion ranges from 2.89 to 10.

75.

21. A packaging apparatus comprising: a processor; and a memory, wherein the memory has stored therein computer executable code which, when executed by the processor, performs the packaging method of any one of claims 16 to 20.

22. A computer readable storage medium having stored thereon executable code which, when executed by a processor, causes the processor to perform the packaging method of any one of claims 16 to 20.

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