Steel shell battery cell pole post runway type pp glue forming die

Abstract

The utility model belongs to battery accessory processing equipment technical field, and disclose a kind of steel shell electric core pole runway type PP glue forming die, the die includes upper die holder, lower die holder, die frame, two groups of first punch, movable material loading platform, two groups of second punch, telescopic actuator and first punch fixed-distance feeding structure, when working, PP glue strip material horizontal feeding movable material loading platform, upper die holder down and press movable material loading platform;Telescopic actuator drives the movement of inclined block, and by slope cooperation promotes inclined block and top rod, so that first punch fixed-distance down, and with the second punch of blanking passage cooperation stamping out two pieces of runway type PP film, after upper die holder reset, movable material loading platform rises under the action of movable elastic member, realize film and strip material separation, film is collected by blanking passage sliding, the die solves film sticking problem, improves production continuity and rate, guarantees product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of battery accessory processing equipment, specifically a steel-shell battery cell terminal racetrack-shaped PP molding die. Background Technology

[0002] In the battery manufacturing industry, racetrack-shaped PP film used for steel-cased battery cell terminals serves as a key insulating and sealing component, and its production efficiency and quality stability are crucial to the entire battery cell mass production process. Currently, the industry relies heavily on traditional stamping dies or semi-automatic cutting equipment for processing such PP films, but there are two major pain points in actual production that severely restrict the improvement of production efficiency.

[0003] On the one hand, the problem of film adhesion is widespread and difficult to solve. Because PP adhesive itself has a certain degree of stickiness, the finished film easily adheres to the strip or punch after stamping. This phenomenon not only interrupts the material feeding process, requiring manual intervention to separate the film, increasing labor costs and operation time, but also may cause surface contamination or deformation of the film due to manual contact, affecting the subsequent assembly accuracy with the battery cell terminals. Especially in continuous production scenarios, downtime caused by adhesion disrupts the production rhythm, significantly reduces the effective operating time of equipment, and seriously interferes with production continuity.

[0004] On the other hand, production rates are insufficient to meet the demands of large-scale mass production. Most existing production equipment, limited by its structural design, can only process one racetrack-shaped PP sheet in a single die stroke. This single-station operation mode results in a fixed output per unit time, failing to match the ever-increasing production capacity demands of the power battery industry. Simultaneously, the traditional equipment suffers from poor coordination between strip feeding and punching actions, leading to positioning deviations when increasing operating speed, further limiting the potential for improving production efficiency. With the expansion of power battery production capacity, this low-speed production mode has gradually become a bottleneck restricting the overall cycle time of cell assembly lines, unable to meet the requirements of modern production lines for efficient, continuous, and stable production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a steel-shell battery cell terminal racetrack-shaped PP molding die to solve the problems of easy product adhesion and low single-station production efficiency mentioned in the background technology.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a steel-shell battery cell terminal racetrack-shaped PP molding die, comprising: An upper mold base is provided, and a mold frame is provided below the upper mold base. Two sets of downwardly extending first punches are provided inside the mold frame. The lower die base has a movable material loading platform above it, and two sets of second punches corresponding to the first punch are installed inside the movable material loading platform. A telescopic actuator is provided on the horizontal side of the upper mold base, and the telescopic actuator is provided with a telescopic rod. The first punch fixed-distance feeding structure is disposed in the upper die base and the die frame to realize the fixed-distance extension and retraction of the first punch. The first punch fixed-distance feeding structure includes an inclined block and an inclined moving block. The inclined block is fixedly disposed on the telescopic rod, and the inclined moving block is disposed below the inclined block, and the inclined moving block cooperates with the inclined surface of the inclined block.

[0007] Preferably, two sets of guide posts are provided between the telescopic actuator and the upper mold base, and the telescopic actuator has guide holes corresponding to the guide posts.

[0008] Preferably, the upper mold base is provided with two sets of vertically downward moving block limiting grooves, each of which is provided with an inclined moving block. Each set of inclined moving blocks corresponds to a set of first punches. Each inclined moving block is provided with a push rod at its bottom, which abuts against the top of the first punch. The top of the first punch is also provided with a reset spring.

[0009] Preferably, the upper mold base is provided with a fixed-distance limiting groove corresponding to the telescopic rod.

[0010] Preferably, the movable material carrier platform is provided with four sets of strip material limiting guide posts, and the four sets of strip material limiting guide posts form a slender channel corresponding to the PP adhesive strip.

[0011] Preferably, the second punch has a feeding channel at its center, and the lower die base has a through hole corresponding to the feeding channel.

[0012] Preferably, the bottom of the movable material platform is provided with four sets of movable springs, one end of which abuts against the movable material platform, and the other end of which is fixed inside the lower mold base.

[0013] Compared with the prior art, this utility model provides a steel-shell battery cell terminal racetrack-shaped PP molding die, which has the following beneficial effects: This steel-shell battery cell terminal racetrack-shaped PP molding die is equipped with an upper die base, a lower die base, a die frame, a first punch, a movable material platform, a second punch, a telescopic actuator, and a fixed-distance feeding structure for the first punch. Based on the principle of stamping dies, the device can process slender strips of PP material into racetrack-shaped small pieces that fit the battery cell terminal. The broken racetrack-shaped PP sheets do not stick to the strip material, ensuring stable material feeding. Furthermore, the first punch retracts, preventing the formed products from sticking to the first punch. The punch movement is stable, and each die stroke can stamp out two finished racetrack-shaped PP sheets, resulting in high production speed, good production quality, and strong practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lower mold structure of this utility model; Figure 3 This is a schematic diagram of the upper mold structure of this utility model; Figure 4 This is a schematic diagram of the fixed-distance feeding structure of the first punch of this utility model.

[0015] In the diagram: 1. Upper die base; 2. Lower die base; 3. Die frame; 4. First punch; 5. Movable loading platform; 6. Second punch; 7. Telescopic actuator; 8. First punch fixed-distance feed structure; 9. Telescopic rod; 10. Guide post; 11. Inclined block; 12. Inclined moving block; 13. Moving block limiting groove; 14. Fixed-distance limiting groove; 15. Strip material limiting guide post; 16. Unloading channel; 17. Movable spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: A steel-shell battery cell terminal post racetrack-shaped PP molding die, comprising: Upper mold base 1, mold frame 3 is provided below the upper mold base 1, and two sets of first punches 4 that can extend downward are provided inside the mold frame 3; The lower die base 2 has a movable material platform 5 above it, and two sets of second punches 6 corresponding to the first punch 4 are set inside the movable material platform 5. Four sets of guide pillars are set between the upper die base 1 and the lower die base 2. The upper die base 1 is installed on the upper part by a hanger, and the lower die base 2 is installed on the lower part. The first punch 4 is a solid punch, which is equivalent to a punch. The second punch 6 has a hole in the center (feeding channel 16), which is equivalent to a die. The shapes of the first punch 4, the second punch 6 and the feeding channel 16 are all similar to racetracks, which can process PP rubber strips into small racetrack-shaped pieces that are compatible with the battery cell terminals.

[0018] Telescopic actuator 7 is located on the horizontal side of the upper mold base 1. Telescopic actuator 7 is equipped with a telescopic rod 9. The specific type and model of telescopic actuator 7 are not limited. Any type commonly used by those skilled in the art is applicable. Pneumatic telescopic actuator is recommended.

[0019] The first punch fixed-distance feed structure 8 is disposed within the upper die base 1 and the die frame 3 to realize the fixed-distance extension and retraction of the first punch 4. The first punch fixed-distance feed structure 8 includes an inclined block 11 and an inclined moving block 12. The inclined block 11 is fixedly disposed on the telescopic rod 9, and the inclined moving block 12 is disposed below the inclined block 11, and the inclined moving block 12 engages with the inclined surface of the inclined block 11. The telescopic actuator 7 drives the inclined block 11 to move horizontally. Since the inclined moving block 12 engages with the inclined surface of the inclined block 11, the inclined moving block 12 will move downward. Since the physical dimensions of the inclined block 11 and the inclined moving block 12 are fixed, the stroke of the inclined moving block 12 is controlled by the slope and the feed degree of the inclined block 11.

[0020] Furthermore, two sets of guide posts 10 are provided between the telescopic actuator 7 and the upper mold base 1, and guide holes corresponding to the guide posts 10 are opened on the telescopic actuator 7. The guide posts 10 constrain the telescopic direction, which can improve the stability and service life of the device.

[0021] Furthermore, the upper die base 1 is provided with two sets of vertically downward moving block limiting grooves 13, each of which is equipped with an inclined moving block 12. Each set of inclined moving blocks 12 corresponds to a set of first punches 4. Each inclined moving block 12 has a push rod at its bottom, which abuts against the top of the first punch 4. The top of the first punch 4 is also equipped with a reset spring. Using two sets of inclined moving blocks 12 requires the simultaneous installation of two sets of inclined blocks 11. Compared with using a single set of inclined moving blocks 12, the force distribution of the two sets of inclined moving blocks 12 is more uniform, and the movement of the two first punches 4 is more coordinated and stable, resulting in better production quality. The push rod is used to transmit the downward movement of the inclined moving blocks 12 to the first punches 4. When the inclined moving blocks 12 move downward, the first punches 4 move downward synchronously. When the telescopic rod 9 retracts, the reset spring drives the first punches 4 to rise and reset. The specific model of the reset spring is not limited, and any model commonly used by those skilled in the art is applicable.

[0022] Furthermore, the upper mold base 1 is provided with a fixed-distance limiting groove 14 corresponding to the telescopic rod 9. The fixed-distance limiting groove 14 limits the extension and retraction stroke of the telescopic rod 9, which is especially suitable for pneumatic telescopic devices. If a high-precision servo telescopic device is used, it is not necessary to set the fixed-distance limiting groove 14.

[0023] Furthermore, the movable loading platform 5 is equipped with four sets of strip material limiting guide posts 15, which form a slender channel corresponding to the PP strip material. Since the movable loading platform 5 will move up and down, it is necessary to set up the strip material limiting guide posts 15 to prevent the material from deviating from its designated path.

[0024] Furthermore, the second punch 6 has a feeding channel 16 at its center, and the lower die base 2 has a through hole corresponding to the feeding channel 16. The formed racetrack-shaped PP film falls directly down from the feeding channel 16 and is collected.

[0025] Furthermore, the bottom of the movable loading platform 5 is equipped with four sets of movable springs 17. One end of the movable spring 17 abuts against the movable loading platform 5, and the other end of the movable spring 17 is fixed inside the lower mold base 2. The movable loading platform 5 can be raised and lowered, mainly to facilitate the separation of the racetrack-shaped PP film and PP strip material. The movable springs 17 are used to drive it to rise.

[0026] When the device is in use, PP rubber strips are horizontally input from one side and placed on the movable loading platform 5. At this time, the upper mold base 1 moves downward, and the entire mold frame 3 abuts against the movable loading platform 5. The movable loading platform 5 moves downward, and then the telescopic actuator 7 controls the telescopic rod 9 to extend. The first punch 4 extends downward under the action of the first punch fixed distance feeding structure 8. The first punch 4 and the second punch 6 cooperate to form a racetrack-shaped sheet on the PP rubber strip. Then the upper mold base 1 moves upward to reset, and the entire movable loading platform 5 is raised and reset by the elastic force provided by the movable spring 17. During the reset process, the movable loading platform 5 abuts against the PP rubber strip, causing the PP rubber strip to separate from the racetrack-shaped PP sheet. The racetrack-shaped PP sheet slides down along the feeding channel 16 and is finally collected.

[0027] Structural Description: Upper mold base 1: The upper basic structure of the mold, connected to the mold frame 3 below, and equipped with a moving block limiting groove 13 and a fixed distance limiting groove 14 inside, used to support the first punch 4, telescopic actuator 7 and other components, providing stable support for the movement of the upper mold; Lower mold base 2: The lower basic structure of the mold, with a movable material platform 5 installed on the top, a movable spring 17 fixed inside and a through hole corresponding to the material discharge channel 16, serving as the installation and support carrier for the lower mold components; Mold frame 3: Located below the upper mold base 1, it contains two sets of downward-extending first punches 4, which move synchronously with the upper mold base 1 and can resist the movable material platform 5 to move downward, providing installation and movement guidance for the first punches 4; First punch 4: solid punch structure, two sets in total, set in the mold base 3, the top is connected to the ejector pin and reset spring, driven downward by the first punch fixed distance feed structure 8, and cooperates with the second punch 6 to realize the punching of PP rubber strip material; Movable material carrier 5: Set on the lower mold base 2, with two sets of second punches 6 inside, strip material limiting guide post 15 at the top, and movable spring 17 connected at the bottom, which can be raised and lowered to carry PP strip material and assist in the separation of film and strip material; Second punch 6: A die structure with a central material feeding channel 16, consisting of two sets, corresponding to the first punch 4 and set in the movable material platform 5, cooperating with the first punch 4 to complete the cutting of racetrack-shaped PP film, with the material feeding channel 16 for the formed film to slide down. Telescopic actuator 7: Located on the horizontal side of the upper mold base 1, it has a telescopic rod 9 that can be extended and retracted. It cooperates with the guide post 10 to provide horizontal driving force for the first punch fixed-distance feed structure 8. Pneumatic type is recommended. The first punch fixed-distance feed structure 8 is set in the upper mold base 1 and the mold frame 3, and includes an inclined block 11 and an inclined moving block 12. The horizontal movement of the telescopic rod 9 is converted into the vertical movement of the inclined moving block 12 through the inclined surface cooperation, so as to realize the fixed-distance extension and retraction of the first punch 4. Telescopic rod 9: Connected to telescopic actuator 7, with tilt block 11 fixed at one end, it is driven by telescopic actuator 7 to extend and retract horizontally, and its movement stroke is constrained by fixed distance limit groove 14, providing horizontal movement power for tilt block 11; Guide columns 10: There are two sets in total. They are set between the telescopic actuator 7 and the upper mold base 1. They cooperate with the guide holes on the telescopic actuator 7 to constrain the telescopic rod 9 and improve the motion stability and service life of the device. Inclined block 11: Fixed on telescopic rod 9, it cooperates with the inclined surface of inclined moving block 12. As telescopic rod 9 moves horizontally, it can push inclined moving block 12 to move in the vertical direction. Its physical dimensions determine the stroke of inclined moving block 12. Inclined moving block 12: There are two sets, which are set in the moving block limiting groove 13, located below the inclined block 11 and engaged with its inclined surface. The bottom is connected to the top rod, which is pushed downward by the inclined block 11 to transmit power to the first punch 4. Moving block limiting groove 13: There are two sets, which are vertically downwardly opened in the upper mold base 1. They are used to install the tilting moving block 12, provide vertical movement guidance for the tilting moving block 12, and ensure the stability of its movement trajectory. Fixed-distance limiting groove 14: It is opened on the upper mold base 1 and corresponds to the telescopic rod 9. It is used to limit the maximum extension stroke of the telescopic rod 9. It is especially suitable for pneumatic telescopic actuators 7. High-precision servo telescopic actuators can be omitted. Strip material limiting guide post 15: There are four sets in total, which are set on the top of the movable loading platform 5 to form a slender channel that matches the PP strip material and prevents the PP strip material from running off course when the movable loading platform 5 is raised and lowered. Material feeding channel 16: It is located in the center of the second punch 6 and corresponds to the through hole on the lower die base 2. It allows the racetrack-shaped PP film to pass through and fall down for collection. Movable spring 17: There are four sets in total. One end abuts against the movable material carrier 5, and the other end is fixed in the lower mold base 2. It provides the elastic force for the movable material carrier 5 to rise and reset, and assists in the separation of the film and PP strip.

[0028] Working principle: The working principle of this steel-shell battery cell terminal racetrack-shaped PP molding die is based on the stamping process. Through the coordinated action of the upper and lower dies and precise feed control, the efficient conversion of PP strip material into racetrack-shaped film is achieved.

[0029] During operation, a thin strip of PP material is first horizontally fed into the movable loading platform 5 from one side. A narrow channel formed by four sets of material-limiting guide posts 15 positions and constrains the material, ensuring it does not shift during subsequent processing. At this time, the upper mold base 1 moves downwards under the action of an external drive device, driving the mold frame 3 downwards synchronously until the mold frame 3 abuts against the movable loading platform 5. This forces the movable loading platform 5 to overcome the elastic force of the four sets of movable springs 17 at the bottom and move downwards, completing the pre-press positioning.

[0030] When the movable loading platform 5 reaches the preset position, the telescopic actuator 7 is activated, driving the telescopic rod 9 to extend horizontally along the guide post 10 (the guide post 10 ensures stable telescopic direction by cooperating with the guide hole). The extension of the telescopic rod 9 causes the inclined block 11 fixed on it to move synchronously. Since the inclined block 11 and the inclined moving block 12 set in the moving block limiting groove 13 form an inclined surface cooperation, the horizontally moving inclined block 11 will push the inclined moving block 12 to move downward in the vertical direction. Its stroke is precisely controlled by the physical size characteristics (inclination and feed degree) of the inclined block 11 and the inclined moving block 12. At the same time, the maximum displacement of the telescopic rod 9 is constrained by the fixed distance limiting groove 14 of the upper mold base 1 to ensure motion accuracy.

[0031] When the tilting block 12 moves downward, it pushes the corresponding first punch 4 (solid punch) downward through the bottom push rod. The two sets of first punches 4 are precisely aligned with the two sets of second punches 6 (dies with material discharge channels 16) in the movable material platform 5. Since the first punches 4, second punches 6 and material discharge channels 16 are all racetrack-shaped structures, when the first punches 4 and second punches 6 close the mold, they will punch the PP strip material sandwiched in the middle, and punch out two racetrack-shaped sheets that are compatible with the battery cell terminals on the strip material in one go.

[0032] After stamping, the upper die holder 1 moves upward to reset, releasing the pressure of the die frame 3 on the movable loading platform 5. The movable loading platform 5 then resets upward under the elastic force of the bottom movable spring 17. During the reset process, the surface of the movable loading platform 5 presses against the PP strip material, using its upward movement to completely separate the strip material from the stamped racetrack-shaped film, preventing adhesion. The separated film falls through the feeding channel 16 at the center of the second punch into the through hole of the lower die holder 2, and finally slides down to the collection device for recycling.

[0033] Simultaneously, the telescopic actuator 7 drives the telescopic rod 9 to retract, and the tilting block 11 returns to its original position. Under the action of the reset spring, the tilting moving block 12 moves upward, driving the first punch 4 back to its initial position, waiting for the next stamping cycle. Throughout the process, the symmetrical design of the two sets of tilting moving blocks 12 and the punch ensures uniform force distribution. Combined with the guiding effect of the guide post and guide sleeve, the punch movement is stable. Each die stroke can produce two finished products, achieving high-speed, high-quality continuous production.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PP molding die for steel-shell battery cell terminals in a racetrack shape, characterized in that, include: Upper mold base (1), a mold frame (3) is provided below the upper mold base (1), and two sets of first punches (4) that can extend downward are provided in the mold frame (3). The lower die base (2) is provided with a movable material platform (5) above it, and two sets of second punches (6) corresponding to the first punch (4) are provided in the movable material platform (5). Telescopic actuator (7), the telescopic actuator (7) is located on the horizontal side of the upper mold base (1), and the telescopic actuator (7) is provided with a telescopic rod (9). The first punch fixed distance feeding structure (8) is disposed in the upper mold base (1) and the mold frame (3) to realize the fixed distance extension and retraction of the first punch (4). The first punch fixed distance feeding structure (8) includes an inclined block (11) and an inclined moving block (12). The inclined block (11) is fixedly disposed on the telescopic rod (9). The inclined moving block (12) is disposed below the inclined block (11), and the inclined moving block (12) cooperates with the inclined surface of the inclined block (11).

2. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 1, characterized in that, Two sets of guide posts (10) are provided between the telescopic actuator (7) and the upper mold base (1), and the telescopic actuator (7) is provided with guide holes corresponding to the guide posts (10).

3. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 1, characterized in that, The upper mold base (1) is provided with two sets of vertically downward moving block limiting grooves (13). Each moving block limiting groove (13) is provided with an inclined moving block (12). Each set of inclined moving blocks (12) corresponds to a set of first punches (4). Each inclined moving block (12) is provided with a push rod at the bottom. The push rod abuts against the top of the first punch (4). The top of the first punch (4) is also provided with a reset spring.

4. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 3, characterized in that, The upper mold base (1) is provided with a fixed distance limiting groove (14) corresponding to the telescopic rod (9).

5. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 1, characterized in that, The movable material carrier (5) is provided with four sets of strip material limiting guide posts (15), and the four sets of strip material limiting guide posts (15) form a slender channel corresponding to the PP rubber strip.

6. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 1, characterized in that, The second punch (6) has a feeding channel (16) in the center, and the lower die base (2) has a through hole corresponding to the feeding channel (16).

7. The steel-shell battery cell terminal racetrack-shaped PP molding die according to claim 1, characterized in that, The bottom of the movable loading platform (5) is provided with four sets of movable springs (17). One end of the movable spring (17) abuts against the movable loading platform (5), and the other end of the movable spring (17) is fixed inside the lower mold base (2).

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