CN210045850U

CN210045850U - Mold core structure

Info

Publication number: CN210045850U
Application number: CN201920197712.5U
Authority: CN
Inventors: 刘高明; 李雄成; 刘克永
Original assignee: Hunan Lifang New Energy Science and Technology Co Ltd
Current assignee: Hunan Lifang New Energy Science and Technology Co Ltd
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2020-02-11
Anticipated expiration: 2029-02-14

Abstract

The utility model belongs to the technical field of the battery is manufactured, especially, relate to a mold core structure, including first teflon portion, second teflon portion and metal portion, first teflon portion with second teflon portion integrated into one piece, second teflon portion with the metal portion tight fit is connected, second teflon portion is provided with the lug, the metal portion be provided with lug complex recess, four corners of mold core structure are provided with the mounting. Compared with the prior art, the utility model provides the uniformity of the interval of high mold core and die periphery prevents that the plastic-aluminum membrane from dashing the shell the time damaged, improves the factor of safety of battery.

Description

Mold core structure

Technical Field

The utility model belongs to the technical field of the battery manufacture, especially, relate to a mold core structure.

Background

The soft package lithium ion battery is composed of a naked battery cell and an aluminum plastic film packaged on the outer surface of the naked battery cell. In the production process of the soft package lithium ion battery, the mold is the core part for molding the aluminum plastic film. At present, a forming mold comprises an upper template, a lower template and a mold core, wherein the mold core is placed in a concave cavity of the lower template. The existing mold core has the following defects: in the aluminum plastic film shell punching forming process, the surface of the integrated steel mold core is not smooth enough, the Teflon combined mold core is easy to deform, and the distance between the mold core and the periphery of the female mold is unstable, so that the stability of the shell punching depth is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects of the prior art, the mold core structure is provided, the consistency of the distance between the mold core and the periphery of the female mold is improved, the aluminum plastic film is prevented from being damaged when the shell is punched, and the safety coefficient of the battery is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a mold core structure, includes first teflon portion, second teflon portion and metal portion, first teflon portion with second teflon portion integrated into one piece, second teflon portion with metal portion tight fit is connected, second teflon portion is provided with the lug, metal portion be provided with lug complex recess, four angular positions of mold core structure are provided with the mounting.

It should be noted that, the utility model discloses a combination of teflon material and metal material (preferably SKD11 material), the combined surface is lug and recess complex design, wherein, the surface smoothness of teflon material is that general metal material can't be replaced, can make the tensile more even of plastic-aluminum membrane when dashing the shell shaping to improve the uniformity of the interval of mold core and die periphery, reduce the risk of broken shell, and metal part hardness is high, difficult by frictional damage when dashing the shell shaping. In addition, four angular positions of the die core structure are provided with fixing pieces (such as screws) for fixing, so that the deformation of the four angular positions is prevented, and the influence on the shell punching depth is reduced, thereby ensuring that the elongation of the punching film is uniform and stable, reducing the risk of shell breaking and improving the safety coefficient of the battery.

As an improvement of the mold core structure, the length and the width of the second teflon part are both smaller than the length and the width of the first teflon part, the first teflon part and the transition part of the second teflon part form a shoulder. The provision of the shoulders enables the core structure to be placed securely on the platen.

As an improvement of the mold core structure of the present invention, the length and width of the second Teflon portion are respectively consistent with the length and width of the metal portion.

As an improvement of the mold core structure, the middle area of the upper surface of the first Teflon part is provided with a sunken air storage cavity. The arrangement of the air storage cavity increases the air storage capacity, and negative pressure can be better avoided from being formed in a short time when the shell punching action is completed.

As an improvement of the mold core structure, the depth of the gas storage cavity is 2-8 mm.

As an improvement of the mold core structure the position department of the gas storage cavity, the mold core structure is provided with a plurality of through holes running through from top to bottom.

As an improvement of mold core structure, the through-hole includes first through-hole, second through-hole and third through-hole, first through-hole is located mold core structure's positive center, the second through-hole is located on mold core structure's the axis, the third through-hole is located on four angular position of mold core structure. Wherein the diameter of the first through hole is the largest.

As an improvement of the mold core structure, the fixing member is installed in the third through hole. The mounting is installed in the third through-hole that is located the angular position department for fixed first teflon portion places it and takes place to warp.

As an improvement of the mold core structure of the present invention, the edge of the upper surface of the first Teflon portion protrudes and forms a round surrounding edge.

As an improvement of mold core structure, the surrounding edge sets up the isopycnic form, the thickness of surrounding edge is 1~5 mm.

The beneficial effects of the utility model reside in that: the utility model provides a mold core structure, including first teflon portion, second teflon portion and metal portion, first teflon portion with second teflon portion integrated into one piece, second teflon portion with metal portion tight fit is connected, second teflon portion is provided with the lug, metal portion be provided with lug complex recess, four angular positions of mold core structure are provided with the mounting. Compared with the prior art, the utility model provides the uniformity of the interval of high mold core and die periphery prevents that the plastic-aluminum membrane from dashing the shell the time damaged, improves the factor of safety of battery.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the present invention when being installed on an aluminum plastic film forming mold.

Wherein: 1-a first teflon part, 2-a second teflon part, 3-a metal part, 4-a fixing part, 5-a shoulder part, 6-a through hole, 11-a gas storage cavity, 12-a surrounding edge, 21-a bump, 31-a groove, 61-a first through hole, 62-a second through hole, 63-a third through hole, 100-a mold core structure, 200-a bottom plate, 300-a pressing plate and 400-a concave mold.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

As shown in fig. 1, a mold core structure, including first teflon portion 1, second teflon portion 2 and metal portion 3, first teflon portion 1 and second teflon portion 2 integrated into one piece, second teflon portion 2 is connected with metal portion 3 tight fit, second teflon portion 2 is provided with lug 21, metal portion 3 is provided with recess 31 with lug 21 complex, four corners of mold core structure are provided with mounting 4.

Further, the length and the width of the second teflon part 2 are both smaller than those of the first teflon part 1, and the transition part of the first teflon part 1 and the second teflon part 2 forms a shoulder 5.

Further, the length and width of the second teflon part 2 coincide with those of the metal part 3, respectively.

Further, a sunken air storage cavity 11 is arranged in the middle area of the upper surface of the first Teflon part 1.

Further, the depth of the air storage cavity 11 is 2-8 mm.

Further, at the location of the air reservoir 11, the core structure is provided with a number of through holes 6 running through it.

Further, the through holes 6 include a first through hole 61, a second through hole 62 and a third through hole 63, the first through hole 61 is located at the center of the mold core structure, the second through hole 62 is located on the central axis of the mold core structure, and the third through hole 63 is located at four corners of the mold core structure.

Further, the fixing member 4 is mounted to the third through hole 63.

Further, the edge of the upper surface of the first teflon part 1 protrudes and encloses a surrounding edge 12.

Furthermore, the surrounding edge 12 is set to be of equal thickness, and the thickness of the surrounding edge 12 is 1-5 mm.

The utility model is used for the working process when plastic-aluminum membrane forming die is:

as shown in fig. 2, the mold core structure 100 is first fixedly mounted on the bottom plate 200, and the shoulder 5 of the mold core structure 100 is fixed to the press plate 300; then the pressing plate 300 is fixed, the female die 400 operates downwards, and the aluminum plastic film is pressed tightly; finally, the bottom plate 200 and the mold core structure 100 move upwards, and the mold core structure 100 together with the aluminum-plastic film moves towards the inside of the female mold 400 to form the shell punching and resetting structure.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A mold core structure, its characterized in that: including first teflon portion, second teflon portion and metal portion, first teflon portion with second teflon portion integrated into one piece, second teflon portion with metal portion tight fit is connected, second teflon portion is provided with the lug, metal portion be provided with lug complex recess, four angular positions of mold core structure are provided with the mounting.

2. The core structure of claim 1, wherein: the length and the width of second teflon portion all are less than the length and the width of first teflon portion, first teflon portion with the transition position of second teflon portion forms the shoulder.

3. The core structure of claim 1, wherein: the length and the width of the second Teflon part are respectively consistent with those of the metal part.

4. The core structure of claim 1, wherein: and a sunken air storage cavity is arranged in the middle area of the upper surface of the first Teflon part.

5. The core structure of claim 4, wherein: the depth of the air storage cavity is 2-8 mm.

6. The core structure of claim 4, wherein: and at the position of the air storage cavity, the mold core structure is provided with a plurality of through holes which penetrate through the mold core structure from top to bottom.

7. The core structure of claim 6, wherein: the through holes comprise a first through hole, a second through hole and a third through hole, the first through hole is located in the center of the mold core structure, the second through hole is located on the central axis of the mold core structure, and the third through hole is located in four corner positions of the mold core structure.

8. The core structure of claim 7, wherein: the fixing piece is mounted on the third through hole.

9. The core structure of claim 1, wherein: the edge of the upper surface of the first Teflon part protrudes and encloses into a surrounding edge.

10. The core structure of claim 9, wherein: the surrounding edge is arranged in an equal-thickness shape, and the thickness of the surrounding edge is 1-5 mm.