Large diameter can end forming die

Abstract

The utility model provides a kind of large-diameter tank cover forming die, solve the problem that uneven phenomenon easily appears to large-diameter tank cover.It also includes arc-shaped groove, is set in the top surface of lower die body and is located the outside of lower pull bubble mould, two ends of the arc-shaped groove are respectively close to the left and right sides of lower pull bubble mould;No.3 protruding part, set upper die body bottom surface and be used to cooperate with arc-shaped groove.When upper die body cooperates with lower die body, no.1 protruding part cooperates with no.2 protruding part, after no.3 protruding part cooperates with arc-shaped groove, vertical reinforcing rib is added in the periphery of tank cover, the rigidity of tank cover whole is increased, ensure the flatness of tank cover, while inclined reinforcing rib is located the inside of vertical reinforcing rib, and the periphery of large-diameter tank cover is more dispersed stress, easily occur deformation, and smaller force can be used to open tank cover.

Description

Technical Field

[0001] This utility model relates to the field of can lid mold technology, specifically to a large-diameter can lid forming mold. Background Technology

[0002] As a popular beverage packaging material, aluminum cans offer numerous advantages and are therefore widely used for packaging beverages, beer, and more. The can lid features ring-shaped reinforcing ribs to enhance its rigidity and resistance to deformation, preventing deformation or cracking due to uneven stress. However, to allow for easier opening, the reinforcing ribs are designed with an angled structure. This structure is suitable for lids with small diameters. When the lid diameter increases, the larger surface area makes it prone to warping at the edges due to material shrinkage differences. Furthermore, the angled reinforcing ribs, due to insufficient rigidity, result in an uneven lid. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a large-diameter can lid forming mold, which solves the problem that large-diameter can lids are prone to unevenness.

[0004] The technical solution adopted in this utility model is as follows: A large-diameter can lid forming mold includes an upper template and a lower template. An upper mold body is mounted on the upper template, and a lower mold body is mounted on the lower template. The upper mold body has an upper bubble-pulling mold, and the lower mold body has a lower bubble-pulling mold. The bottom surface of the upper mold body has a first protrusion with a ring-shaped structure, and the top surface of the lower mold body has a second protrusion spaced apart from the first protrusion. The mold also includes: An arc-shaped groove is provided on the top surface of the lower mold body and located on the outside of the lower bubble mold. The two ends of the arc-shaped groove are close to the left and right sides of the lower bubble mold, respectively. The third protrusion is set on the bottom surface of the upper mold body and is used to mate with the arc-shaped groove.

[0005] The diameter and length of the lower mold body are proportional to the width and height of the third protrusion.

[0006] The cross-section of the third protrusion is arc-shaped.

[0007] There are at least two protrusions of the first type, and the distance between the protrusions of the first type and the distance between the protrusion of the first type and the third type gradually decreases from the center of the upper mold body toward the outer wall of the upper mold body.

[0008] There are three protrusions, and the upper mold body includes an upper mold, an upper mold, and an upper mold. The protrusions are respectively located on the bottom surfaces of the upper molds.

[0009] Both the upper mold body and the lower mold body are equipped with exhaust channels.

[0010] The beneficial effects of this utility model are: After the upper mold body and the lower mold body are fitted together, the first protrusion fits into the second protrusion, and the third protrusion fits into the arc groove. Vertical reinforcing ribs are added around the can lid, which increases the overall rigidity of the can lid and ensures the flatness of the can lid. At the same time, the inclined reinforcing ribs are located inside the vertical reinforcing ribs, and the force on the periphery of the large-diameter can lid is more dispersed, making it easier to deform. The can lid can be opened with a smaller force. Attached Figure Description

[0011] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0012] Figure 2 This is a utility model Figure 1 Enlarged diagram of point A in the middle.

[0013] Figure 3 This is a schematic diagram of the upper mold body of this utility model.

[0014] Upper mold 1, lower mold 2, upper mold body 3, No. 1 upper mold 31, No. 2 upper mold 32, No. 3 upper mold 33, lower mold body 4, upper bubble mold 5, lower bubble mold 6, No. 1 protrusion 7, No. 2 protrusion 8, arc groove 9, No. 3 protrusion 10, venting channel 11. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: In the embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, a large-diameter can lid forming mold includes an upper template 1 and a lower template 2. An upper mold body 3 is mounted on the upper template 1, and a lower mold body 4 is mounted on the lower template 2. The upper mold body 3 has an upper bubble-pulling mold 5, and the lower mold body 4 has a lower bubble-pulling mold 6. The bottom surface of the upper mold body 3 has a first protrusion 7 with a ring structure, and the top surface of the lower mold body 4 has a second protrusion 8 arranged at intervals from the first protrusion 7. The mold also includes: An arc-shaped groove 9 is provided on the top surface of the lower mold body 4 and located on the outside of the pull-down bubble mold 6. The two ends of the arc-shaped groove 9 are close to the left and right sides of the pull-down bubble mold 6, respectively. The third protrusion 10 is set on the bottom surface of the upper mold body 3 and is used to cooperate with the arc groove 9.

[0016] After the upper mold body 3 and the lower mold body 4 are engaged, the first protrusion 7 and the second protrusion 8 are engaged, and the third protrusion 10 and the arc groove 9 are engaged. Vertical reinforcing ribs are added around the can lid, which increases the overall rigidity of the can lid and ensures the flatness of the can lid. At the same time, the inclined reinforcing ribs are located inside the vertical reinforcing ribs, and the force on the periphery of the large-diameter can lid is more dispersed, making it easier to deform. The can lid can be opened with a smaller force.

[0017] In this embodiment, the diameter of the lower mold body 4 is proportional to the width and height of the third protrusion 10. The ratio of the diameter of the lower mold body 4 to the width of the third protrusion 10 is 110:1-116:1, and the ratio of the diameter of the lower mold body 4 to the height of the third protrusion 10 is 420:1-430:1. The height and width of the vertical reinforcing ribs increase as the diameter of the can lid increases, thereby ensuring the flatness of the can lid.

[0018] In the embodiments, such as Figure 2 As shown, the cross-section of the third protrusion 10 is arc-shaped. The arc-shaped reinforcing rib has better resistance to deformation than the right-angled reinforcing rib, effectively suppressing pressure-induced indentation of the can lid.

[0019] In the embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, there are at least two protrusions 7. The distance between the protrusions 7 and the distance between the protrusions 7 and the third protrusion 10 gradually decreases from the center of the upper mold body 3 towards the outer wall of the upper mold body 3. Multiple inclined reinforcing ribs can be formed on the can lid, and the distance between the inclined reinforcing ribs becomes smaller and smaller. The distance between the inclined reinforcing ribs and the vertical reinforcing ribs is the smallest, so that the strength of the can lid gradually increases from the center to the periphery, which can effectively prevent the deformation of the can lid.

[0020] In the embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, there are three protrusions 7. The upper mold body 3 includes an upper mold 31, an upper mold 32, and an upper mold 33. The protrusions 7 are respectively located on the bottom surfaces of the upper molds 31, 32, and 33. The upper molds 31, 32, and 33 can be positioned by locating pins. The protrusions 7 on the upper mold body 3 can be processed separately, reducing the processing difficulty.

[0021] In the embodiments, such as Figure 1 As shown, both the upper mold body 3 and the lower mold body 4 are provided with exhaust channels 11. This ensures that the pressure distribution within the cavity is balanced after the upper mold body 3 and the lower mold body 4 are fitted together, thereby ensuring the forming accuracy of each reinforcing rib on the can lid.

[0022] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A large-diameter can lid forming mold, comprising an upper mold plate (1) and a lower mold plate (2), wherein an upper mold body (3) is mounted on the upper mold plate (1), and a lower mold body (4) is mounted on the lower mold plate (2); the upper mold body (3) is provided with an upper bubble mold (5), and the lower mold body (4) is provided with a lower bubble mold (6); the bottom surface of the upper mold body (3) is provided with a first protrusion (7) in a ring structure, and the top surface of the lower mold body (4) is provided with a second protrusion (8) arranged at intervals from the first protrusion (7); characterized in that, Also includes: An arc-shaped groove (9) is provided on the top surface of the lower mold body (4) and located on the outside of the lower pull bubble mold (6). The two ends of the arc-shaped groove (9) are close to the left and right sides of the lower pull bubble mold (6), respectively. The third protrusion (10) is set on the bottom surface of the upper mold body (3) and is used to cooperate with the arc groove (9).

2. The large-diameter can lid forming mold as described in claim 1, characterized in that: The diameter of the lower mold body (4) is proportional to the width and height of the third protrusion (10).

3. The large-diameter can lid forming mold as described in claim 1, characterized in that: The cross-section of the third protrusion (10) is arc-shaped.

4. The large-diameter can lid forming mold as described in claim 1, characterized in that: There are at least two protrusions (7), and the distance between the protrusions (7) and the distance between the protrusions (7) and the third protrusion (10) gradually decreases from the center of the upper mold body (3) toward the outer wall of the upper mold body (3).

5. A large-diameter can lid forming mold as described in claim 4, characterized in that: There are three protrusions (7). The upper mold body (3) includes an upper mold (31), an upper mold (32), and an upper mold (33). The protrusions (7) are respectively located on the bottom surfaces of the upper mold (31), the upper mold (32), and the upper mold (33).

6. The large-diameter can lid forming mold as described in claim 1, characterized in that: Both the upper mold body (3) and the lower mold body (4) are provided with exhaust channels (11).

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