Easy-to-tear cover with pull lug and manufacturing method of packaging tin of easy-to-tear cover

Abstract

The easy-to-tear cover with the pull lug comprises an easy-to-tear cover body, the easy-to-tear cover body is provided with two sealing parts, the two spliced sealing parts are matched with a can opening structure of a packaging can and block the can opening of the packaging can, and the peripheral edges of the sealing parts are detachably connected with the inner peripheral wall of the packaging can in a sealed mode; two pull lug parts which are connected with each other and are bent towards the direction deviating from the packaging tin are arranged between the two sealing parts, each pull lug part is connected with the corresponding sealing part, a first folding mark for bending the pull lug part is arranged between the connected pull lug part and the sealing part, a second folding mark parallel to the first folding mark is arranged between the two pull lug parts, and the pull lug part is connected with the corresponding sealing part. The defects that in the prior art, tearing of the inner wall of the laminated paper can is not beneficial to overall presentation, and the opening effect is affected can be overcome.

Description

Technical Field

[0001] The invention relates to the technical field of packaging can manufacturing, in particular to an easy-tear cover with a pull ear and a manufacturing method of the packaging can. Background Art

[0002] Some packaging cans used to store potato chips, dried fruits, freeze-dried food, pet food, etc. in the prior art include laminated paper cans, plastic cans, etc., which are provided with a can body and a can lid. The can lid is also called an easy-tear lid, which is used to cover the opening of the can body to seal the laminated can body. When the contents in the can body need to be eaten or used, the can lid needs to be torn off the can body through the pull ear. In some cases, the can body is usually provided with a circular opening of a smaller diameter, and the side of the can lid cannot be provided with a pull ear. It needs to be opened from the middle with the help of a tool, and the opening method without a pull ear is not conducive to opening with bare hands. In other cases, the can lid is usually provided with a smaller pull ear, and the can lid includes a pull ear and an easy-tear film. The pull ear is located on one side of the can lid, and the pull ear and the easy-tear film are pre-processed. Under the preset heat laminating conditions, the pull ear and the easy-tear film are heat-laminated. The pull ear opens the opening of the can body from the side, but the pull ear opened on this side is not conducive to opening, and it is easy to tear the inner wall of the laminated paper can, which is not conducive to the overall presentation of the opening of the can body. Summary of the invention

[0003] The purpose of the present invention is to provide an easy-tear cover with a pull ear and a method for manufacturing the same, so as to solve the problems existing in the prior art, overcome the problem that the inner wall of the laminated paper can is torn, which is not conducive to the overall presentation and affects the opening effect, and also solves the problem that the easy-tear cover with a small-diameter can mouth cannot be provided with a pull ear.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides an easy-tear cover with a pull ear, comprising an easy-tear cover body, wherein the easy-tear cover body is provided with two sealing portions, the two sealing portions after being spliced ​​match the can mouth structure of the packaging can, and are sealed at the can mouth of the packaging can, and the outer peripheral edge thereof is detachably and sealedly connected to the inner peripheral wall of the packaging can;

[0005] Two ear parts connected to each other and bent in a direction away from the packaging can are provided between the two sealing parts, each ear part is connected to the corresponding sealing part, and a first fold for bending the ear part is provided between the connected ear parts and the sealing part, and a second fold parallel to the first fold is provided between the two ear parts.

[0006] Preferably, the outer peripheral edge of the sealing portion is provided with a flange bent in a direction away from the packaging can, the two flanges are spliced ​​into an annular structure and match the structure of the packaging can mouth, and the flange is detachably sealed to the inner peripheral wall of the packaging can.

[0007] A method for making a packaging can is also provided, comprising the following steps:

[0008] S1. Preparing a can body of a packaging can: preparing the can body and the required coating layer, preparing the coating layer into a cylindrical structure matching the can body, and coating the coating layer on the inner wall surface of the can body;

[0009] S2, preparing an easy-tear cover with a pull ear: preparing a required laminating layer and folding it, die-cutting the folded edge of the laminating layer to obtain a blank with a pull ear, folding and unfolding the two sealing parts of the blank along the first folding line to obtain an easy-tear cover body matching the can mouth structure of the can body;

[0010] S3, covering the can body and the easy-tear cover: covering the easy-tear cover body on the can mouth of the can body.

[0011] Preferably, the required laminating layer is prepared before step S1: the laminating layer adopts an aluminized film, aluminum foil is prepared, and at least one layer of heat-laminated film is heat-laminated on one side of the aluminum foil; when the prepared aluminized film is used to prepare the can body, the surface of the aluminized film having the heat-laminated film is located on the side close to the axis of the can body; when the easy-tear cover body is laminated on the can mouth of the can body, the side of the aluminized film having the heat-laminated film faces the can body.

[0012] Preferably, in step S1, the aluminum-plated film is prepared into a tubular structure matching the diameter of the tank body through a tube rolling process, and the aluminum-plated film after tube rolling is subjected to a precision cutting process to obtain a structure matching the length of the tank body.

[0013] Preferably, in the process of rolling the aluminized film into a tube, the overlapping parts of the aluminized film are connected by heat lamination.

[0014] Preferably, in step S2, the aluminum-plated film is folded along its transmission direction.

[0015] Preferably, between step S2 and step S3, the pull tab portion of the easy-tear cover body is printed.

[0016] Preferably, in step S3, the easy-tear cover body is connected to the can body by heat pressing.

[0017] Preferably, after step S3, the ear portion of the easy-tear cover body is folded, and the ear portion is attached to a sealing portion of the easy-tear cover body.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The two pull ears are fitted together by the second crease, and the two pull ears are folded with the corresponding sealing parts by the first crease, so that the pull ears can extend in the direction away from the can body of the packaging can. Then, when opening the can mouth, the entire easy-tear cover body is vertically pulled up in the direction away from the can body of the packaging can by the pull ears to separate it from the packaging can, thereby avoiding the adverse effect of tearing the heat-laminated film from the packaging can in the prior art on the overall presentation of the final opening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the overall structure of the easy-tear cover body in one embodiment of the present invention;

[0022] Figure 2 This is a first example of combining the easy-tear cover body and the can body of the present invention;

[0023] Figure 3 This is the second example of the combination of the easy-tear cover body and the can body of the present invention;

[0024] Figure 4 This is the third example of the combination of the easy-tear cover body and the can body of the present invention;

[0025] Figure 5 This is the fourth example of the combination of the easy-tear cover body and the can body of the present invention;

[0026] Among them, 1-sealing part, 2-ear part, 3-second fold, 4-first fold, 5-tearable cover body, 6-can body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide an easy-tear cover with a pull ear and a method for manufacturing the same, so as to solve the problems existing in the prior art, overcome the problem that the inner wall of the laminated paper can is torn, which is not conducive to the overall presentation and affects the opening effect, and also solves the problem that the easy-tear cover with a small-diameter can mouth cannot be provided with a pull ear.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 5 As shown, the present embodiment provides an easy-tear cover with a pull ear, comprising an easy-tear cover body 5, preferably the easy-tear cover body 5 is made of an aluminum-plated film, the easy-tear cover body 5 is provided with two sealing parts 1, the two sealing parts 1 after being spliced ​​match the can mouth structure of the packaging can, and are sealed at the can mouth of the packaging can, and the outer peripheral edges thereof are detachably and sealedly connected with the inner peripheral wall of the packaging can; two pull ear parts 2 connected to each other and bent in a direction away from the packaging can are provided between the two sealing parts 1, each pull ear part 2 is respectively connected to the corresponding sealing part 1, and a bending hole for the pull ear part 2 is provided between the connected pull ear part 2 and the sealing part 1 A first crease 4 is folded, and a second crease 3 parallel to the first crease 4 is provided between the two pull ear portions 2, so that the two pull ear portions 2 are fitted together through the second crease 3, and the two pull ear portions 2 can be folded with the corresponding sealing portion 1 through the first crease 4, so that the pull ear portions 2 can extend in a direction away from the can body 6 of the packaging can, and then when the can mouth is opened, the pull ear portions 2 are used to vertically pull up the entire easy-tear cover body 5 in a direction away from the can body 6 of the packaging can to separate it from the packaging can, thereby avoiding the adverse effect of tearing the heat-bonded film from the packaging can in the prior art on the overall presentation of the final opening effect.

[0031] In a specific embodiment, the outer peripheral edge of the sealing portion 1 is provided with a flange bent in a direction away from the packaging can, that is, the outer peripheral edge of the sealing portion 1 not connected to the pull ear portion is bent with a flange in a direction away from the packaging can, the two flanges are spliced ​​into an annular structure and match the structure of the mouth of the packaging can, the flange is detachably and sealedly connected to the inner peripheral wall of the packaging can, and the two sealing portions 1 are connected to the inner peripheral wall of the packaging can through the flanges to improve the firmness and sealing of the connection between the sealing portion 1 and the packaging can.

[0032] Furthermore, a method for manufacturing a packaging can is provided, comprising the following steps:

[0033] S1. Preparation of the can body 6 of the packaging can: prepare the can body 6 and the required laminating layer. The can body 6 of the packaging can is preferably made of a laminated paper can or a plastic can. The laminating layer is prepared into a cylindrical structure matching the can body 6 and laminated on the inner wall surface of the can body 6. Specifically, in the process of preparing the can body 6 of the packaging can, the laminating layer is firstly laminated on the basic body of the can body 6 by rolling the tube to obtain the laminated can body 6, and then the laminated can body 6 is cut to obtain the can body 6 of the packaging can. The laminating layer added in the preparation process is used for the can body 6 to be thermally laminated with the subsequent easy-tear cover body 5.

[0034] S2, preparing an easy-to-tear cover with a pull ear: prepare the required laminating layer and fold it, preferably, fold the laminating layer along the direction of its transmission, and after the laminating layer is prepared, roll it up and store it for use, when folding the laminating layer, convey the laminating layer roll to the folding equipment, and fold it while unwinding, and fold the laminating layer along the unwinding direction, and after the folding is completed, heat-laminate the folded position of the laminating layer under the preset heat-laminated conditions to avoid air leakage during the die-cutting process, and then die-cut the folded part of the laminating layer to obtain a blank with a pull ear 2, specifically, after folding the laminating layer, according to the preset shape and size, select the required mold to die-cut it to obtain the pull ear 2 of the corresponding shape. Among them, the preset shape of the pull ear 2 can be set according to actual needs, and the layering of the pull ear 2 can also be increased through the molding process, so as to realize the personalized design of the pull ear. Then, the two sealing portions 1 of the blank are folded and unfolded along the first folding lines 4 to obtain the easy-tear cover body 5 matching the can mouth structure of the can body 6 .

[0035] S3, laminating the can body 6 and the easy-tear cover: laminating the easy-tear cover body 5 on the can mouth of the can body 6 to complete the production of the entire packaging can.

[0036] The entire packaging can manufacturing method can realize the structural shape of the pull ear portion 2 away from the can body 6, and can realize vertically pulling up the pull ear portion 2 in the direction away from the can body 6, thereby avoiding the unfavorable influence on the overall presentation of the final opening effect caused by the tearing of the heat-bonded film from the can body 6 in the prior art. In addition, the connection strength and sealing performance between the easy-tear cover body 5 and the can body 6 are effectively improved, thereby ensuring the sealing performance in the entire packaging can.

[0037] In a specific embodiment, the required laminating layer is prepared before step S1. The laminating layer is preferably prepared by using an aluminized film to prepare aluminum foil, and at least one layer of heat-laminating film is heat-laminated on one side of the aluminum foil. The aluminum foil is preferably made of polyethylene terephthalate. Specifically, during the preparation process, the heat-laminating film and the aluminum foil need to be heat-laminated for at least 0.5-1 second at a temperature of 180-200 degrees Celsius to enhance the connection strength between the two. When the prepared aluminized film is used to prepare the can body 6, the surface of the aluminized film having the heat-laminating film is located on the side close to the axis of the can body 6. When the easy-tear cover body 5 is laminated on the can mouth of the can body 6, the side of the aluminized film having the heat-laminating film faces the can body 6, that is, the inner circumferential wall of the can body 6 and the side of the easy-tear cover body 5 close to the can body 6 are both provided with a heat-laminating film. Under the preset heat-laminating conditions, the two can be effectively sealed, thereby reducing the problem of low sealing in subsequent processing. In addition, preferably, at least one layer of heat-coated film is also heat-coated on the other side of the aluminum foil paper used to prepare the easy-tear cover body 5, so that both sides of the easy-tear cover body 5 are heat-coated with heat-coated films, so as to effectively improve the toughness and strength of the aluminum foil paper, on the one hand, reduce the problem of low sealing in the subsequent processing, and on the other hand, avoid the problem of the ear part 2 being pulled off and unable to open the can mouth when it is pulled away from the can body 6 in a vertical manner. In addition, in some embodiments, the laminating layer can also be made of paper, metal, plastic and composite materials as the base material, and laminated with PE, PLA, PET and PP films.

[0038] In a specific embodiment, in step S1, the aluminized film is prepared into a tubular structure matching the diameter of the tank body 6 by a tube rolling process, and the rolled aluminized film is subjected to a precision cutting process to obtain a structure matching the length of the tank body 6. Preferably, in the process of rolling the aluminized film, the overlapping parts of the aluminized film are thermally laminated and connected to improve the structural strength of the aluminized film after being rolled, so as to avoid cracking that affects the overall sealing.

[0039] In a specific embodiment, between step S2 and step S3, the ear portion 2 of the easy-tear cover body 5 is printed to obtain an ear portion 2 with a corresponding pattern. Specifically, the ear portion 2 is printed according to actual needs to form a colorful printed pattern layer, and a varnish is printed on the surface of the pattern layer to protect the pattern layer and increase the glossiness.

[0040] In a specific embodiment, in step S3, the easy-tear cover body 5 and the can body 6 are connected by hot pressing. Specifically, the easy-tear cover body 5 and the can body 6 are transported to the can body 6 laminating processing position through a connecting line for hot laminating processing. Preferably, the easy-tear cover body 5 and the inner circumferential wall of the can body 6 are hot pressed at a hot pressing temperature of 180-300 degrees Celsius, that is, the hot laminating film on the side of the easy-tear cover body 5 close to the can body 6 is connected with the hot laminating film on the inner circumferential wall of the can body 6 under hot pressing conditions, and the pressing distance is in the range of 1-5 mm, and the hot pressing time is 0.5-3 seconds. Specifically, during the process of hot-pressing the easy-tear cover body 5 and the can body 6, when the hot-pressing mold is used to press the easy-tear cover body 5, the outer peripheral edges of the two sealing portions 1 of the easy-tear cover body 5, that is, the portions not connected to the pull ear portions 2, are turned up in the direction away from the can body 6, and then the turned up edges are heat-laminated with the can body 6 to improve the connection strength and density between the two. Furthermore, by controlling the temperature, pressure and time of the heat lamination of the easy-tear cover body 5 and the can body 6, a reasonable tearing force is obtained, and the best user experience is achieved on the basis of ensuring the sealing performance of the packaging can.

[0041] In a specific embodiment, after step S3, the ear portion 2 of the easy-tear cover body 5 is folded and attached to the sealing portion 1 of the easy-tear cover body 5 to facilitate subsequent packaging work and avoid damage to the ear portion 2 during packaging or transportation, which can overcome the problem that the easy-tear cover of a sealed can with a small diameter cannot be provided with an ear and is not conducive to manual opening in the prior art. The finally prepared packaging cans are then collected and sent to the finished product warehouse.

[0042] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0043] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An easy-tear cover with a pull tab, characterized in that: The easy-tear cover body comprises two sealing parts, which are matched with the mouth structure of the packaging can after being spliced, and are sealed at the mouth of the packaging can, and the outer peripheral edge thereof is detachably sealedly connected with the inner peripheral wall of the packaging can; Two ear parts connected to each other and bent in a direction away from the packaging can are provided between the two sealing parts, each ear part is connected to the corresponding sealing part, and a first fold for bending the ear part is provided between the connected ear parts and the sealing part, and a second fold parallel to the first fold is provided between the two ear parts.

2. The easy-tear cover with a pull tab according to claim 1, characterized in that: The outer peripheral edge of the sealing portion is provided with a flange bent in a direction away from the packaging can, the two flanges are spliced ​​into an annular structure and match the structure of the packaging can mouth, and the flange is detachably sealed to the inner peripheral wall of the packaging can.

3. A method for manufacturing a packaging can with an easy-tear cover with a pull tab according to claim 1 or 2, characterized in that: The steps include: S1. Preparing a can body of a packaging can: preparing the can body and the required coating layer, preparing the coating layer into a cylindrical structure matching the can body, and coating the coating layer on the inner wall surface of the can body; S2, preparing an easy-tear cover with a pull ear: preparing a required laminating layer and folding it, die-cutting the folded edge of the laminating layer to obtain a blank with a pull ear, folding and unfolding the two sealing parts of the blank along the first folding line to obtain an easy-tear cover body matching the can mouth structure of the can body; S3, covering the can body and the easy-tear cover: covering the easy-tear cover body on the can mouth of the can body.

4. The method for making a packaging can according to claim 3, characterized in that: Before step S1, the required laminating layer is prepared: the laminating layer adopts an aluminized film, aluminum foil is prepared, and at least one layer of heat-laminated film is heat-laminated on one side of the aluminum foil; when the prepared aluminized film is used to prepare the can body, the surface of the aluminized film having the heat-laminated film is located on the side close to the axis of the can body; when the easy-tear cover body is laminated on the can mouth of the can body, the side of the aluminized film having the heat-laminated film faces the can body.

5. The method for making a packaging can according to claim 4, characterized in that: In step S1, the aluminum-plated film is prepared into a tubular structure matching the diameter of the tank body through a tube rolling process, and the aluminum-plated film after tube rolling is subjected to a precision cutting process to obtain a structure matching the length of the tank body.

6. The method for making a packaging can according to claim 5, characterized in that: In the process of rolling the aluminized film into a tube, the overlapping parts of the aluminized film are connected by heat lamination.

7. The method for making a packaging can according to claim 6, characterized in that: In step S2, the aluminum-plated film is folded along its conveying direction.

8. The method for making a packaging can according to claim 7, characterized in that: Between step S2 and step S3, the pull tab portion of the easy-tear cover body is printed.

9. The method for making a packaging can according to claim 8, characterized in that: In step S3, the easy-tear cover body is connected to the can body by heat pressing.

10. The method for making a packaging can according to claim 9, characterized in that: After step S3, the ear portion of the easy-tear cover body is folded, and the ear portion is attached to a sealing portion of the easy-tear cover body.

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