Die core for aluminum plastic film pit punching

Abstract

The utility model discloses a die core for punching pits in an aluminum-plastic film, which comprises a die core flat plate which is configured into a cuboid flat plate structure; the punching pit areas are formed on the surface of the die core flat plate, and the two punching pit areas are symmetrically arranged on the surface of the die core flat plate; the four corners of the die core flat plate protrude to form protruding type corners, and the ends, close to the pit punching area, of the protruding type corners are arc avoiding parts. And the mold core further comprises exhaust hole groups which are symmetrically arranged. The shape design of the die core is changed, the problem that R corners collapse after pit punching of an aluminum plastic film is solved through the protruding corner parts at the four corners, and the problem that the pit punching of the aluminum plastic film is wrinkled is solved through the design of the symmetrically-distributed exhaust holes.

Description

Technical Field

[0001] The utility model relates to the technical field of punching molds, in particular to a mold core used for punching holes in aluminum-plastic films. Background Art

[0002] Lithium-ion soft-pack batteries are widely used in the market due to their high single-cell energy density, and production demand is increasing day by day. However, the production and manufacturing difficulty and cost of lithium-ion soft-pack power batteries are also relatively high. The structural properties of lithium-ion soft-pack batteries determine that some of their technical problems need to be improved and solved.

[0003] In the prior art, lithium-ion power batteries are developing towards high volume and high quality energy density, and the thickness of the battery cells is getting thicker and thicker. Therefore, the quality requirements for aluminum-plastic film punching are getting higher and higher. The punching molds currently used in daily life are flat designs, which will cause the R corners of the aluminum-plastic film to collapse and wrinkle. Due to the existence of abnormalities such as R corner collapse, foam is usually attached to the four corners of the core of the equipment punching mold to avoid the problem of R corner collapse.

[0004] However, in the prior art, the foam is attached to the four corners of the flat mold core, and the foam is easily damaged and falls off, which is difficult to detect during the production process and will cause the R corner to collapse.

[0005] Therefore, based on the above technical problems, technicians in this field are in urgent need of developing a mold core for punching holes in aluminum-plastic film. Utility Model Content

[0006] The utility model aims to provide a mold core for punching holes in aluminum-plastic film. The mold core changes its appearance design, utilizes protruding corners at four corners to solve the problem of R corner collapse after punching holes in the aluminum-plastic film, and adopts a symmetrically distributed exhaust hole design to solve the problem of wrinkles in the aluminum-plastic film.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model discloses a mold core for punching holes in aluminum-plastic film, the mold core comprising:

[0009] A core plate, wherein the core plate is configured as a rectangular parallelepiped plate structure; and

[0010] A crater area is formed on the surface of the core plate, and two crater areas are symmetrically arranged on the surface of the core plate;

[0011] The four corners of the core plate are protrudingly formed with protruding corners, and one end of the protruding corner close to the punching area is an arc avoidance portion;

[0012] The mold core also includes:

[0013] Symmetrically arranged exhaust hole groups.

[0014] Further, the protruding corner is configured as a square pyramid structure;

[0015] The end where the protruding corner portion is connected to the core flat plate has a square cross-section, and the arc avoidance portion is formed at the position where the protruding corner portion cooperates with the punching area.

[0016] Furthermore, the end surface of the protruding corner portion is protruding with a convex point;

[0017] The height of the protrusion is 20 μm±1 μm.

[0018] Furthermore, the side length of the square of the bottom surface of the protruding corner portion is 1 cm±0.05 cm.

[0019] Furthermore, the exhaust hole group includes:

[0020] Two sets of small round vents and two large round vents;

[0021] Each group of small circular exhaust holes includes two small circular exhaust holes that are spaced apart from each other;

[0022] Each of the cratering areas is provided with one large circular exhaust hole and a group of small circular exhaust holes.

[0023] Furthermore, the opening diameter of the small circular hole exhaust hole is 2 cm ± 0.05 cm;

[0024] The opening diameter of the large circular exhaust hole is 4 cm±0.1 cm.

[0025] Furthermore, the mold core is provided with three screw holes;

[0026] One of the screw holes is arranged between the two punching areas;

[0027] Each of the punching areas is provided with a screw hole.

[0028] In the above technical solution, the utility model provides a mold core for punching holes in aluminum-plastic film, which has the following beneficial effects:

[0029] The mold core of the utility model changes its appearance design, utilizes the protruding corners at the four corners to solve the problem of R corner collapse after the aluminum-plastic film is punched, and adopts the symmetrically distributed exhaust hole design to solve the problem of wrinkles of the aluminum-plastic film after the punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0031] Figure 1 A schematic structural diagram of a mold core for punching holes in aluminum-plastic film provided in an embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 1. Core plate; 2. Protruding corner; 3. Punch area;

[0034] 101, screw hole position;

[0035] 201, arc transition part; 202, convex point;

[0036] 301, small round hole exhaust hole; 302, large round hole exhaust hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] See also Figure 1 As shown;

[0039] This embodiment discloses a mold core for punching holes in aluminum-plastic film, and the mold core includes:

[0040] A core plate 1, wherein the core plate 1 is configured as a rectangular plate structure; and

[0041] A punching area 3 is formed on the surface of the core plate 1, and two punching areas 3 are symmetrically arranged on the surface of the core plate 1;

[0042] The four corners of the core plate 1 are protrudingly formed with protruding corners 2, and one end of the protruding corner 2 close to the punching area 3 is an arc avoidance portion 201;

[0043] The mold core also includes:

[0044] Symmetrically arranged exhaust hole groups.

[0045] Specifically, the present embodiment discloses a new mold core for punching holes in aluminum-plastic film, which is mainly composed of a mold core flat plate 1, and two punching areas 3 are set according to the positions where the aluminum-plastic film needs to be punched. In order to solve the problem of R corner collapse in the prior art, the four corners of the mold core flat plate 1 of the present embodiment are protrudingly formed with protruding corners 2, and in order to avoid the punching areas 3, the positions where the protruding corners 2 of the present embodiment contact the punching areas 3 are avoided by arc avoidance parts 201. At the same time, the present embodiment sets symmetrical exhaust hole groups according to the positions of the punching areas 3.

[0046] Preferably, the protruding corner portion 2 of this embodiment is configured as a square pyramid structure;

[0047] The end of the protruding corner 2 connected to the core plate 1 has a square cross section, and the position where the protruding corner 2 cooperates with the punching area 3 forms an arc avoidance portion 201. Among them, the end surface of the protruding corner 2 of this embodiment protrudes with a convex point 202; the height of the convex point 202 is 20μm±1μm.

[0048] Preferably, the side length of the square of the bottom surface of the protruding corner portion 2 of this embodiment is 1 cm±0.05 cm.

[0049] First, this embodiment further defines the structure of the protruding corner 2, which is a square pyramid structure as a whole, with a square bottom and the above-mentioned arc avoidance portion 201 formed at the position of the upper part cooperating with the punching area 3. The specific size requirements are detailed above and will not be repeated here.

[0050] Preferably, the exhaust hole group of this embodiment includes:

[0051] Two groups of small circular exhaust holes 301 and two large circular exhaust holes 302;

[0052] Each group of small circular exhaust holes 301 includes two small circular exhaust holes 301 spaced apart from each other;

[0053] Each crater area 3 is provided with a large circular exhaust hole 302 and a group of small circular exhaust holes 301 .

[0054] The opening diameter of the small circular hole exhaust hole 301 of the present embodiment is 2 cm±0.05 cm; the opening diameter of the large circular hole exhaust hole 302 is 4 cm±0.1 cm.

[0055] The present embodiment designs two symmetrical groups of exhaust holes, which are divided into four small circular exhaust holes 301 and two large circular exhaust holes 302. In order to avoid wrinkles of the aluminum-plastic film, after the small circular exhaust holes 301 near the two sides of the aluminum-plastic film are exhausted, the excess gas that has not been exhausted is released through the large circular exhaust holes 302 in the middle.

[0056] Preferably, the mold core of this embodiment is provided with three screw holes 101;

[0057] A screw hole 101 is provided between the two punching areas 3;

[0058] Each punching area 3 is provided with a screw hole 101 .

[0059] In the above technical solution, the utility model provides a mold core for punching holes in aluminum-plastic film, which has the following beneficial effects:

[0060] The mold core of the utility model changes its appearance design, utilizes the protruding corners 2 at the four corners to solve the problem of R corner collapse after the aluminum-plastic film is punched, and adopts the symmetrically distributed exhaust hole design to solve the problem of aluminum-plastic film wrinkles after punching.

[0061] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mold core for punching holes in aluminum-plastic film, characterized in that: The mold core comprises: A core plate (1), wherein the core plate (1) is configured as a rectangular plate structure; and A crater area (3) is formed on the surface of the core plate (1), and two crater areas (3) are symmetrically arranged on the surface of the core plate (1); The four corners of the core plate (1) are protrudingly formed with protruding corners (2), and one end of the protruding corner (2) close to the punching area (3) is a circular arc avoidance portion (201); The mold core also includes: Symmetrically arranged exhaust hole groups.

2. A mold core for punching holes in aluminum-plastic film according to claim 1, characterized in that: The protruding corner portion (2) is configured as a square pyramid structure; The end where the protruding corner (2) is connected to the core plate (1) has a square cross section, and the arc avoidance portion (201) is formed at the position where the protruding corner (2) cooperates with the punching area (3).

3. A mold core for punching holes in aluminum-plastic film according to claim 2, characterized in that: The end surface of the protruding corner portion (2) is protruding with a protruding point (202); The height of the protrusion (202) is 20 μm±1 μm.

4. A mold core for punching holes in aluminum-plastic film according to claim 2, characterized in that: The side length of the square of the bottom surface of the protruding corner portion (2) is 1 cm±0.05 cm.

5. The mold core for punching holes in aluminum-plastic film according to claim 1, characterized in that: The exhaust hole group comprises: Two groups of small circular exhaust holes (301) and two large circular exhaust holes (302); Each group of small circular exhaust holes (301) comprises two small circular exhaust holes (301) that are spaced apart from each other; Each of the cratering areas (3) is provided with one of the large circular exhaust holes (302) and a group of the small circular exhaust holes (301).

6. A mold core for punching holes in aluminum-plastic film according to claim 5, characterized in that: The opening diameter of the small circular exhaust hole (301) is 2 cm ± 0.05 cm; The opening diameter of the large circular exhaust hole (302) is 4 cm±0.1 cm.

7. A mold core for punching holes in aluminum-plastic film according to claim 1, characterized in that: The mold core is provided with three screw holes (101); One of the screw holes (101) is arranged between the two punching areas (3); Each of the punching areas (3) is provided with a screw hole (101).

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