Shell punching equipment for improving shell punching curl of aluminum-plastic composite film and shell punching die of shell punching equipment

Abstract

The utility model discloses shell punching equipment for improving shell punching curl of an aluminum-plastic composite film and a shell punching die of the shell punching equipment. The shell punching die comprises an upper die body, a lower die body, a heating body, a compression spring and a linkage piece assembled on the upper die body. An upper forming matching part is arranged at the bottom end of the upper die body, and a lower forming matching part is arranged at the top end of the lower die body. A containing cavity is formed in the lower die body. The heating body is arranged in the containing cavity in an up-down sliding mode and has a working position and an avoiding position relative to the lower die body, the front end and the rear end of the heating body both extend out of the lower die body, and at least one of the front end and the rear end of the heating body is provided with a matching structure matched with the linkage piece in a linkage mode. The compression spring is arranged in the containing cavity and located below the heating body. The linkage piece is linked with the matching structure to drive the heating body to slide downwards together in the mold closing process of the upper mold body and the lower mold body, so that the heating body is switched to the avoiding position from the working position; therefore, the curling of the shell punched from the aluminum-plastic composite film is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery manufacturing, in particular to a shell punching device and a shell punching die thereof for improving the curling of aluminum-plastic composite film shell punching. Background Art

[0002] As we all know, aluminum-plastic composite film is widely used in the new energy industry, including but not limited to e-cigarettes, energy storage, wearables, 3C, lithium batteries, etc. Due to different application scenarios, different shapes of shells are punched out on the aluminum-plastic composite film, so the use of shell punching molds is indispensable.

[0003] However, in the existing shell punching mold, due to unreasonable design, combined with the fact that the stress on the nylon membrane surface in the aluminum-plastic composite film is greater than the stress on the polypropylene membrane surface in the aluminum-plastic composite film, the shell punched out from the aluminum-plastic composite film will have different degrees of curling towards the nylon membrane, and the degree of curling will affect the use of the next process.

[0004] Therefore, in the urgent need of a kind of shell punching equipment and shell punching die thereof that improve the curling of aluminum-plastic composite film shell punching to overcome above-mentioned defective. Utility Model Content

[0005] One purpose of the utility model is to provide a shell punching die for improving the curling of shells punched out of aluminum-plastic composite film, so as to effectively improve the curling of shells punched out of the aluminum-plastic composite film.

[0006] Another object of the present invention is to provide a shell punching device for improving the curling of shells punched out of aluminum-plastic composite film, so as to effectively improve the curling of shells punched out of aluminum-plastic composite film.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a punching die for improving the curling of aluminum-plastic composite film punching shells, which comprises an upper mold body, a lower mold body, a heating body, a compression spring, and a linkage assembled on the upper mold body. The bottom end of the upper mold body is provided with an upper forming fitting part, and the top end of the lower mold body is provided with a lower forming fitting part that cooperates with the upper forming fitting part to form a shell. The lower forming fitting part punches out a shell on the aluminum-plastic composite film together with the upper forming fitting part during the mold closing process of the upper mold body and the lower mold body. The lower mold body is provided with a receiving cavity located on the side of the lower forming fitting part, and the receiving cavity passes through the top surface, front and back of the lower mold body. The heating body can be slid up and down in the receiving cavity and has a working position and a avoidance position relative to the lower mold body. The front and rear ends of the heating body both extend out of the lower mold body, and at least one of the front and rear ends of the heating body is provided with a matching structure that cooperates with the linkage. The compression spring is placed in the receiving cavity and below the heating body. The compression spring elastically abuts between the heating body and the lower mold body. The compression spring switches the heating body to the working position. The linkage links the matching structure to drive the heating body to slide downward during the closing process of the upper mold body and the lower mold body, thereby switching the heating body from the working position to the avoidance position.

[0008] Compared to the prior art, the design of the heating element, compression spring, and linkage assembled on the upper mold body allows the heating element to heat both side edges of the aluminum-plastic composite film before the upper forming portion of the upper mold body and the lower forming portion of the lower mold body have been stamped to form the aluminum-plastic composite film. This heating of the polypropylene film within the aluminum-plastic composite film increases the stress of the polypropylene film layer, thereby improving the degree of curling of the shell punched out of the aluminum-plastic composite film by the upper and lower forming portions, thereby facilitating subsequent use of the shell. Since the heating element is switched to a retracted position during the process of punching the shell out of the aluminum-plastic composite film by the upper and lower forming portions of the lower mold body, so as to be in an operating position before the upper and lower forming portions have been stamped to form the aluminum-plastic composite film, the heating element does not affect the operation of the upper and lower forming portions.

[0009] Preferably, the heating body is flush with the top surface of the lower mold body or protrudes upward from the top surface of the lower mold body when in the working position, and the heating body is lower than the top surface of the lower mold body when in the avoidance position.

[0010] Preferably, the lower mold body is provided with a necking structure at a position adjacent to its top surface for reducing the size of the accommodating cavity in the left and right directions, and the heating body is correspondingly provided with a limiting structure that cooperates with the necking structure to limit the position, and the limiting structure abuts against the necking structure when the heating body is in the working position.

[0011] Preferably, the compression springs in the accommodating cavity are arranged in a front-to-rear correspondence in the front-to-rear direction of the lower mold body.

[0012] Preferably, the receiving cavity and the heating body are arranged correspondingly on the left and right sides of the lower mold body, so that the lower molding fitting part is located between the receiving cavities; the connecting parts are arranged correspondingly on the left and right sides of the upper mold body.

[0013] Preferably, the matching structure on the left side of the heating body protrudes from the left side of the heating body, and the matching structure on the right side of the heating body protrudes from the right side of the heating body; the connecting part is a push rod and corresponds to the matching structure in the upper and lower directions of the lower mold body, and the push rod is separated from the matching structure during the opening process of the upper mold body and the lower mold body.

[0014] Preferably, the connecting part is a rope, and the matching structure is a lower lug located at the center position of the lower side of the heating body, and the lower lug protrudes vertically downward from the heating body; the lower mold body is provided with a first wheel and a second wheel which are offset downward relative to the accommodating cavity and are located relatively below the lower lug, and the first wheel and the second wheel are arranged side by side in a spaced-apart manner in the left and right directions of the lower mold body, one end of the rope is fixed to the lower lug, and the other end of the rope passes around the first wheel and the second wheel in sequence and is fixed to the upper mold body.

[0015] Preferably, the wheel diameters of the first wheel and the second wheel are the same; the position of the rope between the lower lug and the first wheel and the position of the rope between the upper mold body and the second wheel are both in a vertical state, and the position of the rope between the first wheel and the second wheel is arranged horizontally.

[0016] Preferably, the upper mold body is provided with a lower lug protruding vertically from the upper mold body and for fixing the end of the rope.

[0017] To achieve the above-mentioned purpose, the present invention provides a punching device for improving the curling of aluminum-plastic composite film punching shells, comprising a base, a column, a top seat, upper and lower slides, an upper and lower actuator, and the aforementioned punching mold. The column is fixed between the base and the top seat, the upper and lower slides are located in the space enclosed by the base, the top seat, and the column, the upper and lower actuators are mounted on the top seat, and the output ends of the upper and lower actuators are assembled and connected to the upper and lower slides. The lower mold body and the upper mold body are both located between the base and the upper and lower slides, the lower mold body is fixed to the base, and the upper mold body is fixed to the upper and lower slides.

[0018] Compared with the prior art, since the shell punching equipment of the present invention for improving the curling of aluminum-plastic composite film shell punching includes the aforementioned shell punching die, it also has the beneficial effects of the shell punching die. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a plan view of a shell punching device having a shell punching die according to the present invention, viewed from the front to the back, wherein the upper die body and the lower die body are in an open and closed state.

[0020] Figure 2 yes Figure 1 Plan view of the shell punching die.

[0021] Figure 3 yes Figure 2 The shown shell punching die is a plan view viewed along the direction indicated by arrow A.

[0022] Figure 4 yes Figure 3 The shown shell punching die is a plan view viewed along the direction indicated by arrow B.

[0023] Figure 5 yes Figure 2 The shell punching die shown is a plan view showing the aluminum-plastic composite plastic.

[0024] Figure 6 yes Figure 2 The plan view of the shell punching die shown is after the upper die body and the lower die body are closed.

[0025] Figure 7 Yes Figure 2 The plan view of the shell punching die undergoing deformation is shown. DETAILED DESCRIPTION

[0026] In order to explain the technical content and structural features of the present invention in detail, the following is a further description in conjunction with the embodiments and the accompanying drawings.

[0027] See also Figure 1 The shell punching device 100 of the present invention includes a shell punching die 10, a base 20, a column 30, a top seat 40, an upper and lower slide seat 50 and an upper and lower drive 60. The column 30 is fixed between the base 20 and the top seat 40; Figure 1 As an example, the top seat 40 is located parallel to and directly above the base 20, and the column 30 is vertically supported between the base 20 and the top seat 40, so that the top seat 40 is supported directly above the base 20 by means of the column 30; Obviously, according to actual needs, the relationship between the base 20, the top seat 40 and the column 30 can also be other relationships well known in the art, so it is not used herein. Figure 1 Limits shown.

[0028] The upper and lower slide seats 50 are located in a space 70 surrounded by the base 20, the top seat 40 and the column 30, so that the upper and lower slide seats 50 can slide up and down in the space 70 surrounded by the base 20, the top seat 40 and the column 30, thereby meeting the needs of the shell punching movement; Figure 1 As an example, a vertical guide post 80 parallel to the column 30 is fixed between the base 20 and the top seat 40. The vertical guide post 30 passes through the left and right sides of the upper and lower slide seats 50 respectively, so as to ensure the smoothness and stability of the upper and lower slide seats 50 sliding up and down under the guidance of the vertical guide post 80. Obviously, according to actual needs, the vertical guide post 80 can be replaced with other guide structures well known in the art, such as the cooperation of the slide rail and the slider, so it is not necessary to use Figure 1 Limits shown.

[0029] The up-down drive 60 is mounted on the top base 40, and the top base 40 provides support for the fixed installation of the up-down drive 60; the output end 61 of the up-down drive 60 is assembled and connected with the up-down slide 50 to meet the needs of the up-down slide 50 being driven by the up-down drive 60 to slide up and down; Figure 1 As an example, the top seat 40 supports the upper and lower drivers 60 from below, and the output end 61 of the upper and lower drivers 60 passes downward through the top seat 40 and is assembled and connected to the upper and lower slide seats 50. This simplifies the assembly structure between the output end 61 of the upper and lower drivers 60 and the upper and lower slide seats 50. In addition, since the top seat 40 supports the upper and lower drivers 60 from below, the upper and lower drivers 60 will not occupy the space between the top seat 40 and the base 20, and will not cause the distance between the top seat 40 and the base 20 to be too large. Obviously, according to actual needs, the upper and lower drivers 60 can also be arranged below the top seat 40, so it is not necessary to Figure 1 In addition, the upper and lower drives 60 can be selected as oil cylinders, of course, can also be selected as air cylinders or electric push rods and the like.

[0030] Recombination Figure 2 and Figure 3 The shell punching die 10 includes an upper die body 11, a lower die body 12, a heating element 13, a compression spring 14, and a linkage 15 assembled on the upper die body 11. The upper die body 11 and the lower die body 12 are located between the base 20 and the upper and lower slides 50. The upper die body 11 is fixed to the upper and lower slides 50 to meet the need for the upper die body 11 to slide up and down with the upper and lower slides 50; the lower die body 12 is fixed to the base 20, and the base 20 provides support for the lower die body 12.

[0031] The bottom end of the upper mold body 11 is provided with an upper forming matching portion 111, and the top end of the lower mold body 12 is provided with a lower forming matching portion 121 formed in cooperation with the upper forming matching portion 111. The lower forming matching portion 121 punches out a shell on the aluminum-plastic composite film 200 together with the upper forming matching portion 111 during the mold closing process of the upper mold body 11 and the lower mold body 12. Figures 1 to 3 As an example, the upper forming matching portion 111 is a forming cavity and the lower forming matching portion 121 is a forming convex core; obviously, according to actual needs, the upper forming matching portion 111 can also be a forming convex core and the lower forming matching portion 121 can be a forming cavity. Figures 1 to 3 Limits shown.

[0032] The lower mold body 12 is provided with a receiving cavity 122 located beside the lower mold fitting portion 121. The receiving cavity 122 penetrates the top surface 123, the front surface 124 and the rear surface 125 of the lower mold body 12 to meet the need that the heating element 13 can be exposed to the lower mold body 12 from the front, the rear and the top of the lower mold body 12. The heating element 13 can be slid up and down in the receiving cavity 122, so that the heating element 13 has a working position relative to the lower mold body 12 (see Figures 1 to 3 and Figure 4 shown) and an avoidance position (see Figure 6 The front end 131 and the rear end 132 of the heating body 13 are both extended from the lower mold body 12, and the state is shown in FIG. Figure 3 and Figure 4 As shown, the front end 131 and the rear end 132 of the heating body 13 are both provided with a matching structure 133 that cooperates with the connecting piece 15, so that the connecting piece 15 can link the heating body 13 to slide downward from the front end 131 and the rear end 132 of the heating body 13, thereby improving the stability and smoothness of the downward sliding of the heating body 13; it can be understood that when the front end 131 and the rear end 132 of the heating body 13 are both provided with a matching structure 133, correspondingly, the connecting piece 15 is also arranged in a front-to-rear corresponding manner in the front and rear directions of the upper mold body 11, so as to meet the needs of the front side connecting piece 15 to link the front end 131 of the heating body 13 and the rear side connecting piece 15 to link the rear end 132 of the heating body 13.

[0033] The compression spring 14 is placed in the receiving cavity 122 and is located below the heating body 13; the compression spring 14 elastically abuts between the heating body 13 and the lower mold body 12, and the compression spring 14 switches the heating body 13 to the working position so that the heating body 13 can be automatically reset under the action of the compression spring 14.

[0034] Therefore, during the process of closing the upper mold body 11 and the lower mold body 12, that is, during the process of the upper and lower actuators 60 driving the upper and lower slide seats 50 together with the upper mold body 11 to slide downward, the linkage 15 links the matching structure 133 to drive the heating body 13 to slide downward, thereby switching the heating body 13 from the working position to the avoidance position. Figure 6 This can avoid the influence of the heating body 13 on the work of both the upper molded matching part 111 and the lower molded matching part 121. More specifically, as follows:

[0035] like Figure 2 As shown, as an example, the heating body 13 is flush with the top surface 123 of the lower mold body 12 when in the working position, so that the heating body 13 can better contact the two side edges of the aluminum-plastic composite film 200 fed into between the upper mold body 11 and the lower mold body 12 from the outside when in the working position, thereby providing a more sufficient heating effect to the two side edges; and because the heating body 13 is flush with the top surface 123 of the lower mold body 12 when in the working position, the resistance of the heating body 13 to the aluminum-plastic composite film 200 in transportation can also be reduced; obviously, according to actual needs, the heating body 13 can also be made to protrude upward from the top surface 123 of the lower mold body 12 when in the working position, that is, the heating body 13 is made to protrude slightly from the top surface 123 of the lower mold body 12. In addition, the heating body 13 is lower than the top surface 123 of the lower mold body 12 when in the avoidance position, and the state is shown in FIG. Figure 6 As shown, the heating body 13 is prevented from affecting the operation of both the upper molded matching portion 111 and the lower molded matching portion 121. Figure 2 As an example, the lower mold body 12 is provided with a necking structure 126 at a position adjacent to its top surface 123 for reducing the left-right size of the accommodating cavity 122, and the heating body 13 is correspondingly provided with a limiting structure 134 that cooperates with the necking structure 126 to limit the position. The limiting structure 134 abuts against the necking structure 126 when the heating body 13 is in the working position to prevent the heating body 13 from accidentally falling off from the lower mold body 12, thereby improving the reliability of the operation of the heating body 13.

[0036] In order to improve the synchronization of the upward and downward sliding of the front end 131 and the rear end 132 of the heating body 13, Figure 3 In the embodiment, as an example, the compression springs 14 in the receiving cavity 122 are arranged in a front-to-rear direction in the front-to-rear direction of the lower mold body 12. In order to meet the need of simultaneously heating the edges of the aluminum-plastic composite film 200 fed from the outside into the space between the upper mold body 11 and the lower mold body 12, Figure 2 As an example, the receiving cavity 122 and the heating body 13 are arranged in a left-right correspondence on the left and right directions of the lower mold body 12, so that the lower molding matching portion 121 is located between the receiving cavity 122; correspondingly, the connecting piece 15 is arranged in a left-right correspondence on the left and right directions of the upper mold body 11, so as to meet the need of the left connecting piece 15 to link the matching structure 133 on the left heating body 13 to slide downward, and the need of the right connecting piece 15 to link the matching structure 133 on the right heating body 13 to slide downward. In order to prevent the connecting piece 15 from affecting the two side edges of the aluminum-plastic composite film 200 fed from the outside into between the upper mold body 11 and the lower mold body 12, Figure 2As an example, the matching structure 133 on the left side of the heating body 13 protrudes from the heating body 13 toward the left, and the matching structure 133 on the right side of the heating body 13 protrudes from the heating body 13 toward the right; correspondingly, the connecting member 15 is a push rod, which corresponds to the matching structure 133 in the up and down directions of the lower mold body 12. The push rod (see label 15) is separated from the matching structure 133 during the opening process of the upper mold body 11 and the lower mold body 12. Figures 1 to 3 and Figure 5 As shown, that is to say, ejector pin is not to keep linkage state with matching structure 133 always, and their linkage belongs to intermittent. Therefore, after upper die body 11 slides downwards a certain distance, ejector pin is to just beginning to push matching structure 133.

[0037] See also Figure 7 , it is right Figures 1 to 6 The shell punching die 100 shown in FIG. Figure 7 In the case of a shell punching die 10 ', Figures 1 to 6 The shell punching die 10 shown is basically the same, with the following differences:

[0038] At Figure 7 In the figure, its connecting piece 15' is a rope, that is, the number 15' also represents the rope; the matching structure 133' is a lower lug located at the center position of the lower side of the heating body 13, that is, the number 133' also represents the lower lug; the lower lug 133' protrudes vertically downward from the heating body 13. At this time, the lower mold body 12 is provided with a first wheel 127 and a second wheel 128 that are biased downward relative to the receiving cavity 122 and are located relatively below the lower lug 133'. The first wheel 127 and the second wheel 128 are arranged side by side in a spaced-apart manner in the left and right directions of the lower mold body 12; one end of the rope 15' is fixed to the lower lug 133', and the other end of the rope 15' passes through the first wheel 127 and the second wheel 128 in turn and is fixed to the upper mold body 11; this design allows the connecting piece 15' to pull the center position of the lower side of the heating body 13, so that the heating body 13 is evenly stressed, and thus the heating body 13 slides up and down more smoothly and reliably. Specifically, in Figure 7 As an example, the first wheel 127 and the second wheel 128 have the same wheel diameter, so that the position 151 of the rope 15' between the lower lug 133' and the first wheel 127 and the position 153 of the rope 15' between the upper mold body 11 and the second wheel 128 are both in a vertical state, and the position 152 of the rope 15' between the first wheel 127 and the second wheel 128 is arranged horizontally; further improving the uniformity of the pulling force applied by the rope 15' to the heating body 13. Figure 7 In the embodiment, as an example, the upper mold body 11 is provided with a lower lug 112 vertically protruding from the upper mold body 11 and for fixing the end of the rope 15 ', so as to facilitate the fixed connection of the rope 15 '.

[0039] And Figures 1 to 6 The shell punching die 10 shown has a connecting piece 15 as a push rod, a matching structure 133 as a push block, and the matching structure 133 on the left side of the heating body 13 protrudes from the heating body 13 toward the left, and the matching structure 133 on the right side of the heating body 13 protrudes from the heating body 13 toward the right.

[0040] Apart from the above differences, the other two are the same, so I will not go into details here.

[0041] Compared with the prior art, with the aid of the design of the heating body 13, the compression spring 14 and the linkage 15 (15') assembled on the upper mold body 11, before the upper forming fitting portion 111 of the upper mold body 11 and the lower forming fitting portion 121 of the lower mold body 12 are stamped to form the aluminum-plastic composite film 200, the heating body 13 heats the edges of both sides of the aluminum-plastic composite film 200, and by heating the polypropylene film of the inner layer of the aluminum-plastic composite film 200, the stress of the polypropylene film layer is increased, thereby improving the curling degree of the shell punched out from the aluminum-plastic composite film 200 by the upper forming fitting portion 111 and the lower forming fitting portion 121, thereby facilitating the subsequent use of the shell. Since the heating body 13 is switched to the avoidance position during the process of the upper molding matching part 111 and the lower molding matching part 121 punching out the shell from the aluminum-plastic composite film, and is in the working position before the upper molding matching part 111 and the lower molding matching part 121 are stamped to form the aluminum-plastic composite film 200, the heating body 13 does not affect the operation of both the upper molding matching part 111 and the lower molding matching part 121.

[0042] It is worth noting that the direction indicated by arrow A in the drawings is from left to right for the upper mold body 11 and the lower mold body 12, the direction indicated by arrow B in the drawings is from top to bottom for the upper mold body 11 and the lower mold body 12, and the direction indicated by arrow C in the drawings is from front to back for the upper mold body 11 and the lower mold body 12. In addition, the aluminum-plastic composite film 200 is conveyed along the front-to-back direction of the upper mold body 11 and the lower mold body 12, so that the heating element 13 is stretched along the side edge of the aluminum-plastic composite film 200.

[0043] The above disclosure is only a preferred embodiment of the present invention and cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope covered by the present invention.

Claims

1. A punching die for improving the curling of aluminum-plastic composite film punching shells, comprising an upper mold body and a lower mold body, wherein the bottom end of the upper mold body is provided with an upper forming matching portion, and the top end of the lower mold body is provided with a lower forming matching portion formed in cooperation with the upper forming matching portion, wherein the lower forming matching portion punches out a shell on the aluminum-plastic composite film together with the upper forming matching portion during the clamping process of the upper mold body and the lower mold body, and is characterized in that: The shell punching mold also includes a heating body, a compression spring and a linkage assembled on the upper mold body, the lower mold body is provided with a receiving cavity located on the side of the lower forming matching part, the receiving cavity passes through the top surface, front and back of the lower mold body, the heating body can be slid up and down in the receiving cavity and has a working position and an avoidance position relative to the lower mold body, the front and rear ends of the heating body both extend out of the lower mold body, at least one of the front and rear ends of the heating body is provided with a matching structure that cooperates with the linkage, the compression spring is placed in the receiving cavity and is located below the heating body, the compression spring elastically abuts between the heating body and the lower mold body, the compression spring switches the heating body to the working position; the linkage links the matching structure to drive the heating body to slide downward during the process of closing the upper mold body and the lower mold body, thereby switching the heating body from the working position to the avoidance position.

2. The shell punching die according to claim 1, characterized in that: The heating body is flush with the top surface of the lower mold body or protrudes upward from the top surface of the lower mold body when in the working position, and is lower than the top surface of the lower mold body when in the avoidance position.

3. The shell punching die according to claim 1, characterized in that: The lower mold body is provided with a necking structure at a position adjacent to its top surface for reducing the left-right size of the accommodating cavity, and the heating body is correspondingly provided with a limiting structure that cooperates with the necking structure to limit the position, and the limiting structure abuts against the necking structure when the heating body is in the working position.

4. The shell punching die according to claim 1, characterized in that: The compression springs in the receiving cavity are arranged in a front-to-rear correspondence in the front-to-rear direction of the lower mold body.

5. The shell punching die according to claim 1, characterized in that: The receiving cavity and the heating body are arranged correspondingly on the left and right sides of the lower mold body, so that the lower forming fitting part is located between the receiving cavities; the connecting parts are arranged correspondingly on the left and right sides of the upper mold body.

6. The shell punching die according to claim 5, characterized in that: The matching structure on the left side of the heating body protrudes from the left side of the heating body, and the matching structure on the right side of the heating body protrudes from the right side of the heating body; the connecting part is a push rod and corresponds to the matching structure in the upper and lower directions of the lower mold body, and the push rod is separated from the matching structure during the opening process of the upper mold body and the lower mold body.

7. The shell punching die according to claim 5, characterized in that: The connecting part is a rope, and the matching structure is a lower lug located at the center position of the lower side of the heating body, and the lower lug protrudes vertically downward from the heating body; the lower mold body is provided with a first wheel and a second wheel which are biased downward relative to the accommodating cavity and are located relatively below the lower lug, and the first wheel and the second wheel are arranged side by side in a spaced-apart manner in the left and right directions of the lower mold body, one end of the rope is fixed to the lower lug, and the other end of the rope passes around the first wheel and the second wheel in sequence and is fixed to the upper mold body.

8. The shell punching die according to claim 7, characterized in that: The wheel diameters of the first wheel and the second wheel are the same; the position of the rope between the lower lug and the first wheel and the position of the rope between the upper mold body and the second wheel are both in a vertical state, and the position of the rope between the first wheel and the second wheel is arranged horizontally.

9. The shell punching die according to claim 7, characterized in that: The upper mold body is provided with a lower lug which vertically protrudes from the upper mold body and is used to fix the end of the rope.

10. A punching device for improving the curling of aluminum-plastic composite film punching shells, comprising a base, a column, a top seat, an upper and lower slide seat and an upper and lower driver, wherein the column is fixed between the base and the top seat, the upper and lower slide seat is located in the space surrounded by the base, the top seat and the column, the upper and lower drivers are installed on the top seat, and the output end of the upper and lower drivers is assembled and connected with the upper and lower slide seat, characterized in that: The shell punching equipment also includes a shell punching mold according to any one of claims 1 to 9, wherein the lower mold body and the upper mold body are both located between the base and the upper and lower slide seats, the lower mold body is fixed on the base, and the upper mold body is fixed on the upper and lower slide seats.

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