Pull ring hemming forming lower die and pull ring

Abstract

The utility model provides a pull ring hemming forming lower die and a pull ring, the pull ring hemming forming lower die is used for being matched with a pull ring hemming forming upper die to form the pull ring of an easy-open lid, the pull ring hemming forming lower die comprises a lower die body, one face of the lower die body is provided with a hemming R groove used for forming a pull ring body, and the other face of the lower die body is provided with a hemming groove. A finger hole forming rod used for forming a finger hole and a riveting end forming part used for forming the riveting end of the pull ring are arranged at the two ends of the curled edge R groove respectively, and a curled edge boss is arranged between the finger hole forming rod and the side wall of the curled edge R groove and arranged on the side, away from the riveting end forming part, of the finger hole forming rod. The hemming boss is arranged between the side wall of the hemming R groove and the finger hole forming rod, a certain gap can be formed between the pull ring formed by the lower die and the cover face through the hemming boss, the fingers can stretch into the finger hole conveniently, and therefore the pull ring can be pulled up conveniently, the cover can be fully opened conveniently, and the use experience of a user can be improved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of easy-open lid pull ring production, and in particular to a pull ring curling molding lower die and a pull ring. Background Art

[0002] In the field of packaging, solid food lids are usually fully opened, which requires a large opening force, usually 10-20 Newtons of breaking force and 20-40 Newtons of full opening force to open. In order to meet the torque requirements, a large pull ring design is usually adopted, and the strength of the pull ring and the support strength of the rivet must be guaranteed. In the process of opening the fully open lid, the pull ring and the lid are close together, and the small space makes it inconvenient for the finger to enter the finger hole of the pull ring, making it difficult to open. The pull ring is easily affected by external forces and rotates, making it difficult to open the fully open lid. Utility Model Content

[0003] The utility model aims to provide a pull ring curling molding lower die which can mold a full-open lid pull ring which is easy to open, and a pull ring molded by the pull ring curling molding lower die.

[0004] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0005] The utility model provides a pull ring curling molding lower die, which is used for cooperating with a pull ring curling molding upper die to mold the pull ring of an easy-open cover, and comprises a lower die body, one side of the lower die body is provided with a curling R groove for molding the pull ring body, two ends of the curling R groove are respectively provided with a finger hole molding rod for molding a finger hole and a rivet end molding part for molding the riveted end of the pull ring, a curling boss is provided between the finger hole molding rod and the side wall of the curling R groove, and the curling boss is provided on the side of the finger hole molding rod away from the rivet end molding part.

[0006] In one embodiment, the curling R groove is an axisymmetric structure, and the curling boss is symmetrical about the symmetry axis of the curling R groove.

[0007] In one embodiment, the curling boss is formed by extending upward from the bottom wall of the curling R groove, and the distance from the top of the curling boss to the bottom wall of the curling R groove is 0.5 mm.

[0008] In one embodiment, the height of the curling boss is smaller than the height of the side wall of the curling R groove.

[0009] In one embodiment, the curling boss extends from the curling R groove side wall toward the finger hole forming rod and has a gap with the finger hole forming rod.

[0010] In one embodiment, the finger hole forming rod extends upward from the bottom wall of the curling R groove and protrudes from the side wall of the curling R groove.

[0011] The curling R groove gradually decreases from one end to the other end, and the finger hole forming rod is arranged at the larger end of the curling R groove.

[0012] As a second aspect, the utility model further provides a pull ring, including a pull ring body, wherein two opposite ends of the pull ring body are provided with a riveted end and a finger hole, and a side of the finger hole away from the riveted end forms an opening notch.

[0013] The beneficial effect brought about by the technical solution provided by the utility model is that a curling boss is arranged between the side wall of the curling R groove and the finger hole forming rod of the pull ring curling forming lower die of the utility model, and the curling boss can make a certain gap between the pull ring formed by the lower die and the cover surface, so that it is convenient for fingers to extend into the finger hole, thereby facilitating pulling up the pull ring and fully opening the cover, which is beneficial to improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments of the present invention.

[0015] Figure 1 A schematic structural diagram of a lower die for forming a pull ring crimping provided in one embodiment of the utility model;

[0016] Figure 2 for Figure 1 A top view of the lower die for forming the pull ring crimping shown;

[0017] Figure 3 A schematic structural diagram of a lower die for forming a pull ring curling provided in another embodiment of the utility model. DETAILED DESCRIPTION

[0018] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method implementation of the present utility model can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this respect.

[0020] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "connected" may be directly connected or indirectly connected through intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0021] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0022] See also Figure 1 and Figure 2 The utility model relates to a lower die for forming a ring pull edge, which is suitable for defining a ring pull molding cavity together with an upper die for forming a ring pull edge, so as to form a ring pull of an easy-to-open lid (such as a full-open lid). The ring pull formed by the lower die for forming the ring pull edge has a thickness of at least a local area of ​​one end away from the riveting part that is smaller than the thickness of other areas of the end, so that a gap is formed between the ring pull and the cover surface of the full-open lid, which facilitates the finger to extend into the finger hole through the gap, and then open the full-open lid, which facilitates the opening of the lid and improves the user experience.

[0023] In addition, it also relates to a pull ring (not shown, the same below) formed by the lower forming die. The pull ring includes a pull ring body, which is provided with a riveted end and a finger hole, and the finger hole is formed at a position away from the riveted end (i.e., the top of the finger hole) to form a convenient opening notch, and the convenient opening notch is used to form a gap with the cover surface when the pull ring is attached to the cover surface of the fully opened cover, and through the convenient opening notch, the user's finger can be easily inserted into the finger hole, thereby reducing customer complaints caused by the rotation and displacement of the pull ring and improving the consumer experience.

[0024] The lower die for curling the pull ring comprises a lower die body 1, and a curling R groove 11 for forming the pull ring body is provided on one side of the lower die body facing the upper die for curling the pull ring. The curling R groove 11 gradually narrows from one end to the other end, and comprises a bottom wall and a side wall 111 arranged around the bottom wall. Finger hole forming rods 12 for forming finger holes and a riveting end forming part 15 for forming the riveting end of the pull ring are provided at both ends of the curling R groove. The finger hole forming rod is provided at the larger end of the curling R groove, and extends upward from the bottom wall of the curling R groove and protrudes from the side wall of the curling R groove. A curling boss 13 is provided between the finger hole forming rod and the side wall of the curling R groove, and the curling boss 13 is provided on the side of the finger hole forming rod 12 away from the riveting end forming part 15, and is used to form the opening notch at the corresponding position of the pull ring when forming the pull ring.

[0025] In one embodiment, the curling R groove 11 is an axisymmetric structure, and the finger hole forming rod 12 and the curling boss 13 are symmetrical about the symmetry axis of the curling R groove 11 .

[0026] In one embodiment, the curling boss 13 is formed by extending upward from the bottom wall of the curling R groove, and the distance from the top of the curling boss to the bottom wall of the curling R groove is 0.5 mm.

[0027] In one embodiment, the height of the curling boss 13 is smaller than the height of the side wall 111 of the curling R groove.

[0028] The 90-degree pull ring curling blank in the previous process completes the final curling in this mold. Since the height of the curling boss is about 0.5mm higher than other curvatures, when the pull ring curling upper mold is pressed down, the aluminum material shrinks along the curvature of the curling mold, and the shrinkage of the curling boss will increase. When the upper mold reaches the bottom and the lower mold is pressed to death, the space at the curling boss is smaller and the material is squeezed thinner, thus forming the said opening notch, which can form a gap that is conducive to the insertion of fingers when the pull ring and the cover surface are matched.

[0029] Therefore, by setting a curling boss between the side wall of the curling R groove and the finger hole forming rod, the curling boss can make the thickness of the corresponding structure on the pull ring (such as the top of the finger hole) smaller than the thickness of other parts, forming an easy-opening notch, so that there is a certain gap between the pull ring and the cover surface, which is convenient for fingers to extend into the finger hole, thereby facilitating pulling up the pull ring and fully opening the cover, which is beneficial to improving the user experience.

[0030] Please combine Figure 3 In another embodiment, the curling boss extends along the side wall of the curling R groove toward the finger hole forming rod, and there is a gap between the curling boss and the finger hole forming rod to avoid the problem of the formed pull ring being broken or deformed due to the structural strength being too low.

[0031] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the above utility model. For example, the above features are replaced with the technical features of the utility model (but not limited to) with similar functions in the utility model of the utility model to form a technical solution.

[0032] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A lower die for forming a ring pull edge, used for cooperating with an upper die for forming a ring pull edge to form a ring pull of an easy-open lid, comprising a lower die body, one side of the lower die body is provided with a ring pull edge R groove for forming the ring pull body, and both ends of the ring pull edge R groove are respectively provided with a finger hole forming rod for forming a finger hole and a riveting end forming part for forming a riveting end of the ring pull, characterized in that: A curling boss for forming an opening notch on the pull ring is provided between the finger hole forming rod and the side wall of the curling R groove, and the curling boss is provided on a side of the finger hole forming rod away from the riveting end forming part.

2. The lower die for forming the pull ring crimping according to claim 1, characterized in that: The curling R groove is an axisymmetric structure, and the curling boss is symmetrical about the symmetry axis of the curling R groove.

3. The lower die for forming the pull ring crimping according to claim 2, characterized in that: The curling boss is formed by extending upward from the bottom wall of the curling R groove, and the distance from the top of the curling boss to the bottom wall of the curling R groove is 0.5 mm.

4. The lower die for forming the ring curling according to claim 3, characterized in that: The height of the curling boss is smaller than the height of the side wall of the curling R groove.

5. The lower die for forming the pull ring curling according to claim 2, characterized in that: The curling boss extends from the curling R groove side wall toward the finger hole forming rod and has a gap with the finger hole forming rod.

6. The lower die for forming the ring curling according to claim 1, characterized in that: The finger hole forming rod extends upward from the bottom wall of the curling R groove and protrudes from the side wall of the curling R groove.

7. The lower die for forming the pull ring crimping according to claim 1, characterized in that: The curling R groove gradually decreases from one end to the other end, and the finger hole forming rod is arranged at the larger end of the curling R groove.

8. A pull ring, characterized in that: The pull ring body comprises a pull ring body, wherein two opposite ends of the pull ring body are provided with a riveted end and a finger hole, and a side of the finger hole away from the riveted end forms an opening notch.

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