Tab cutting device

Abstract

The utility model relates to the technical field of battery production, and particularly provides a tab cutting device which comprises an upper die assembly, a lower die assembly, a trigger mechanism and a blanking mechanism, the upper die assembly is used for being combined with or separated from the lower die assembly, and a first cutting structure is arranged on the upper die assembly. The blanking mechanism is arranged on the upper die assembly and is provided with a material pushing position and a retraction position; when the blanking mechanism is located at the material pushing position, at least part of the structure of the blanking mechanism exceeds the first cutting structure; and when the upper die assembly and the lower die assembly are closed, the trigger mechanism is matched with the blanking mechanism, and the blanking mechanism moves to a material pushing position. A mechanical follow-up blanking method is adopted, control is stable, the cost is low, actions are synchronous, interference of external airflow is small, and the situation that a cutting knife edge is damaged due to pole lug re-cutting caused by the fact that waste is not treated in time is avoided; in addition, chippings cannot be caused to fly over.

Description

Technical Field

[0001] This application relates to the technical field of battery production, and specifically proposes a tab cutting device. Background Technology

[0002] In the battery production process, the electrode sheets need to undergo multiple processing steps, such as the tab cutting process. Specifically, the strip-shaped electrode sheets pass through a cutting device in a certain direction. The upper and lower dies of the cutting device cut the ends of the electrode sheets at intervals, and the waste material is blown off by an air blowing mechanism to form multiple soft tabs.

[0003] However, traditional methods of cleaning waste materials by blowing air have problems such as high cost and poor stability. For example, slow response speed of solenoid valves and inconsistent air pipe layout can affect the effect of blowing and discharging materials, thus affecting product quality. Utility Model Content

[0004] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0005] This application discloses a tab cutting device, which includes an upper mold assembly, a lower mold assembly, a triggering mechanism, and a blanking mechanism; the upper mold assembly is used to close or separate from the lower mold assembly, and a first cutting structure is provided on the upper mold assembly; the blanking mechanism is located on the upper mold assembly and has a pushing position and a retracting position; when the blanking mechanism is in the pushing position, at least a part of the blanking mechanism extends beyond the first cutting structure; when the upper mold assembly and the lower mold assembly are closed, the triggering mechanism cooperates with the blanking mechanism and moves the blanking mechanism to the pushing position.

[0006] In some embodiments, the triggering mechanism includes a push rod and a toggle member; the push rod is fixedly disposed on the lower mold assembly; the toggle member has a first end, a second end and a hinge portion, the hinge portion is located between the first end and the second end, the hinge portion is hinged to the upper mold assembly, and the second end is used to cooperate with the blanking mechanism; during the mold closing process of the upper mold assembly and the lower mold assembly, the push rod lifts the first end of the toggle member, the second end of the toggle member presses against the blanking mechanism, and moves the blanking mechanism to the pushing position.

[0007] In some embodiments, the blanking mechanism includes a bearing member, a guide rod, a pressure applying member, and a reset elastic member; the guide rod is movably connected to the upper mold assembly, and its two ends are respectively connected to the bearing member and the pressure applying member; the reset elastic member is disposed between the bearing member and the upper mold assembly; when the upper mold assembly and the lower mold assembly are closed, the second end of the actuating member presses against the bearing member and drives the pressure applying member to the pushing position through the guide rod; when the upper mold assembly and the lower mold assembly are separated, the reset elastic member drives the bearing member to reset and drives the pressure applying member to the retracted position through the guide rod.

[0008] In some embodiments, the pressure member extends beyond the maximum dimension d of the first cutting structure at the pushing position, and satisfies 3mm≤d≤5mm.

[0009] In some embodiments, the first end of the toggle member is provided with a positioning groove facing the top rod, and the positioning groove is adapted to the end of the top rod.

[0010] In some embodiments, the second end of the actuating member is provided with a rolling element, which cooperates with the feeding mechanism.

[0011] In some embodiments, the upper mold assembly includes an upper base and a hinge frame. The upper base is provided with a receiving groove, the hinge frame is installed in the receiving groove, and the actuating member is disposed in the receiving groove and hinged to the hinge frame.

[0012] In some embodiments, the upper mold assembly further includes a hook member disposed on the upper base, the hook member partially obscuring the receiving groove and limiting the maximum lifting position of the first end of the toggle member.

[0013] In some embodiments, a first cutting structure is disposed on an upper base; the lower mold assembly includes a lower base and a second cutting structure disposed on the lower base, the second cutting structure being sheared with the first cutting structure; the first cutting structure is provided with a relief groove, and a pressure member is disposed in the relief groove; and / or, the lower base is provided with a discharge groove, the discharge groove at least covering the projections of the first cutting structure and the pressure member on the lower base.

[0014] In some embodiments, the distance between the first end of the toggle member and the hinge is a, and the distance between the second end of the toggle member and the hinge is b, and the ratio 1:6 ≤ a:b ≤ 1:3 is satisfied.

[0015] The technical solution proposed in this application has at least the following technical effects:

[0016] In this application, when the upper mold assembly and the lower mold assembly are closed, the triggering mechanism cooperates with the blanking mechanism, and moves the blanking mechanism to the pushing position to push off the cutting waste. This application adopts a mechanical follow-up blanking method, which converts the mold closing force into the pushing force, which is stable, low in cost, and synchronized in action. It is less affected by external airflow interference, eliminates the delay effect that may be caused by the solenoid valve controlling the air blowing, and avoids the damage to the cutting edge caused by the tabs being recut due to the waste not being processed in time. In addition, this application will not cause debris to fly out as in the air blowing blanking method. Attached Figure Description

[0017] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0018] Specifically, the annotations for the accompanying drawings are as follows:

[0019] Figure 1 This is a first isometric view of the tab cutting device described in some embodiments of this application;

[0020] Figure 2 This is a second isometric view of the tab cutting device described in some embodiments of this application;

[0021] Figure 3 This is a partial structural schematic diagram of the tab cutting device described in some embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the triggering mechanism and the material feeding mechanism described in some embodiments of this application;

[0023] Figure 5 This is a partial structural schematic diagram of the material feeding mechanism described in some embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the structure of the toggle element described in some embodiments of this application;

[0025] Figure 7 This is a partial structural schematic diagram of the upper mold assembly described in some embodiments of this application;

[0026] Figure 8 This is a structural diagram showing the combination of the first cutting structure and the second cutting structure as described in some embodiments of this application.

[0027] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0028] 10. Upper mold assembly; 20. Lower mold assembly; 30. Triggering mechanism; 40. Blanking mechanism; 50. Guide post assembly; 110. First cutting structure; 111. Clearance groove; 120. Upper base; 121. Receiving groove; 130. Hinge frame; 140. Hanging part; 150. Connecting seat; 160. Pressing part; 170. Sleeve; 210. Lower base; 211. Blanking groove; 220. Second cutting structure; 310. Push rod; 320. Actuating part; 321. First end; 322. Second end; 323. Hinge part; 324. Positioning groove; 330. Rolling part; 410. Bearing part; 420. Guide rod; 430. Pressing part; 440. Reset elastic part. Detailed Implementation

[0029] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It is to be understood that the content mentioned below is only a partial embodiment of this application, while the complete list of all embodiments is provided. Therefore, other embodiments obtained based on the following embodiments without any inventive effort all fall within the protection scope of this application.

[0030] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0031] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0032] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0033] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0034] The following section further elaborates on the background information relevant to this application.

[0035] In the battery production process, the electrode sheets need to undergo multiple processing steps, such as the tab cutting process. Specifically, the strip-shaped electrode sheet passes through a cutting device in a certain direction. The upper and lower dies of the cutting device cut the ends of the electrode sheet at intervals, and the waste material after cutting is blown off by an air blowing mechanism. The remaining part forms multiple soft tabs on the edge of the electrode sheet.

[0036] More specifically, the handling of tab waste is crucial during the die-cutting process. If the tab waste is not automatically removed in time, it will accumulate on the die cutting edge, causing the tab to be recut and damaging the die cutting edge. This will cause the tab to be stringy during subsequent cutting, and may cause contact problems after the battery cell is assembled, thus affecting the quality of the battery cell.

[0037] The current air-blowing method mainly involves setting air holes at the cutting edge of the mold, with each mold equipped with a solenoid valve. At the moment the upper and lower molds fit together for cutting, the solenoid valve activates and controls the air blowing to blow the tab waste to the lower discharge port. However, the response speed of the solenoid valve, the air pipe arrangement, the transmission delay of electrical signals, the warping of incoming materials, and external airflow interference can all affect the air-blowing and material discharge effect, causing the tab waste to remain at the cutting edge of the lower mold. Subsequent incoming materials will be re-cut at the cutting edge, resulting in tab stringing and seriously affecting the quality of the battery cell.

[0038] Furthermore, the air-blowing method requires additional components such as solenoid valves, air pipes, and PLC control, increasing costs. In actual production, abnormal damage to the solenoid valve can also lead to air-blowing failure, causing tab re-cutting and damaging the cutting edge. Moreover, since the air pipes are movable, consistency in pipe connections across different machines is difficult to guarantee; fixed and bending positions are not always perfectly aligned, affecting the air-blowing effect. Similarly, in electrical control, the different origin positions of the motors driving the upper die can lead to inconsistent and uncontrollable air-blowing angles across different machines. Additionally, during the air-blowing process for cleaning tab waste, copper foil, aluminum foil, and other trimming debris generated during tab cutting cannot gather in the cutting area due to airflow, causing debris to spill into the electrode trimming area.

[0039] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0040] Reference Figures 1 to 8 Please refer to the following: Figure 1 , Figure 4 and Figure 5 The embodiments of this application propose an electrode tab cutting device, which includes an upper mold assembly 10, a lower mold assembly 20, a triggering mechanism 30, and a blanking mechanism 40; the upper mold assembly 10 is used to close or separate from the lower mold assembly 20, and a first cutting structure 110 is provided on the upper mold assembly 10; the blanking mechanism 40 is provided on the upper mold assembly 10 and has a pushing position and a retracting position; when the blanking mechanism 40 is in the pushing position, at least a part of the structure of the blanking mechanism 40 extends beyond the first cutting structure 110; when the upper mold assembly 10 and the lower mold assembly 20 are closed, the triggering mechanism 30 cooperates with the blanking mechanism 40 and moves the blanking mechanism 40 to the pushing position.

[0041] It should be noted that "the blanking mechanism 40 is in the retracted position" means that, under the initial working conditions, the blanking mechanism 40 has not exceeded the first cutting structure 110. "The blanking mechanism 40 is in the pushing position" means that when the upper mold assembly 10 and the lower mold assembly 20 are closed, the first cutting structure 110 cuts the electrode sheet and generates waste material. At this time, the triggering mechanism 30 causes at least a part of the blanking mechanism 40 to exceed the first cutting structure 110, thereby pushing the waste material off.

[0042] In this application, when the upper mold assembly 10 and the lower mold assembly 20 are closed, the trigger mechanism 30 cooperates with the blanking mechanism 40, and the blanking mechanism 40 moves to the pushing position to push off the cutting waste. This application adopts a mechanical follow-up blanking method, which converts the mold closing force into the pushing force, which is stable, low in cost, and synchronized in action. It is less affected by external airflow interference, eliminates the delay effect that may be caused by the solenoid valve controlling the air blowing, and avoids the damage to the cutting edge caused by the tabs being recut due to the waste not being processed in time. In addition, this application will not cause debris to fly out as in the air blowing blanking method.

[0043] Specifically, compared with the air-blowing cleaning method, this application eliminates the electrical control part, reduces costs, and avoids air blowing instability caused by the hysteresis of the solenoid valve; it eliminates the use of air pipes, thereby avoiding inconsistencies in machine installation and enhancing assembly convenience; the follow-up mechanical structure is more stable and reliable, with no risk of failure during the process, and there is no need to consider installation and mold height differences when changing molds; it solves the problem of recutting caused by the tab not falling off, protects the mold cutting edge, and improves the quality of tab cutting; mechanical cleaning of waste does not cause dust overflow, which is conducive to centralized dust removal, and can also prevent the electrode from adhering to the debris and puncturing the battery casing or puncturing the electrode and causing internal short circuits.

[0044] It should be noted that the edge of the first cutting structure 110 of the upper die assembly 10 has an upper die cutting edge, and the edge of the second cutting structure 220 of the lower die assembly 20 has a lower die cutting edge. The upper die cutting edge and the lower die cutting edge cooperate to cut the electrode waste. In addition, when the blanking mechanism 40 is in the pushing position, at least part of the blanking mechanism 40 extends beyond the first cutting structure 110, thereby pushing the cut electrode waste off.

[0045] In some embodiments, refer to Figure 4 and Figure 5The triggering mechanism 30 includes a push rod 310 and a toggle member 320. The push rod 310 is fixedly mounted on the lower mold assembly 20. The toggle member 320 has a first end 321, a second end 322, and a hinge portion 323. The hinge portion 323 is located between the first end 321 and the second end 322. The hinge portion 323 is hinged to the upper mold assembly 10. The second end 322 is used to cooperate with the blanking mechanism 40. During the mold closing process of the upper mold assembly 10 and the lower mold assembly 20, the push rod 310 pushes up the first end 321 of the toggle member 320, and the second end 322 of the toggle member 320 presses against the blanking mechanism 40, causing the blanking mechanism 40 to move to the pushing position.

[0046] This embodiment is a specific implementation of the trigger mechanism 30. During the mold closing process of the upper mold assembly 10 and the lower mold assembly 20, the ejector rod 310 lifts the first end 321 of the actuating member 320, and the second end 322 of the actuating member 320 presses against the blanking mechanism 40, causing the blanking mechanism 40 to move to the pushing position. The cooperation between the ejector rod 310 and the actuating member 320 converts the mold closing force into a pushing force applied to the blanking mechanism 40, ensuring the pressure applied, ensuring accurate stroke, stable control, and enhancing the synchronization of the two actions of mold closing and pushing.

[0047] In some embodiments, refer to Figure 4 and Figure 5 The blanking mechanism 40 includes a pressure-bearing component 410, a guide rod 420, a pressure-applying component 430, and a reset elastic component 440. The guide rod 420 is movably connected to the upper mold assembly 10, and its two ends are respectively connected to the pressure-bearing component 410 and the pressure-applying component 430. The reset elastic component 440 is located between the pressure-bearing component 410 and the upper mold assembly 10. When the upper mold assembly 10 and the lower mold assembly 20 are closed, the second end 322 of the actuating component 320 presses against the pressure-bearing component 410 and drives the pressure-applying component 430 to the pushing position through the guide rod 420. When the upper mold assembly 10 and the lower mold assembly 20 are separated, the reset elastic component 440 drives the pressure-bearing component 410 to reset and drives the pressure-applying component 430 to the retracted position through the guide rod 420.

[0048] This embodiment describes a specific implementation of the blanking mechanism 40. Specifically, when the upper mold assembly 10 and the lower mold assembly 20 are closed, the second end 322 of the actuating member 320 presses against the bearing member 410, and drives the pressure member 430 to the pushing position via the guide rod 420. That is, at least part of the structure of the pressure member 430 extends beyond the first cutting structure 110, and the pressure member 430 is used to push off waste material. When the upper mold assembly 10 and the lower mold assembly 20 are separated, the reset elastic member 440 drives the bearing member 410 to reset, and drives the pressure member 430 to the retracted position via the guide rod 420. It should be understood that when the pressure member 430 is in the retracted position, the pressure member 430 does not extend beyond the first cutting structure 110. Specifically, the pressure member 430 may be flush with the first cutting structure 110 or the pressure member 430 may be retracted into the first cutting structure 110.

[0049] Optionally, the upper mold assembly 10 is provided with a sleeve 170, and the guide rod 420 passes through the sleeve 170 and is movable relative to the sleeve 170. Optionally, the reset elastic element 440 is a spring, which is sleeved on the guide rod 420, and its two ends respectively abut against the pressure member 410 and the sleeve 170. Optionally, multiple guide rods 420 may be provided, for example, referring to Figure 4 and Figure 5 There are three guide rods 420. The two ends of the three guide rods 420 are connected to the pressure-bearing component 410 and the pressure-applying component 430 respectively, thereby enhancing the structural strength and guiding stability.

[0050] In some embodiments, refer to Figure 8 The pressure-applying component 430 extends beyond the maximum dimension d of the first cutting structure 110 at the pushing position, and satisfies 3mm≤d≤5mm.

[0051] In this embodiment, the maximum dimension of the pressure-applying member 430 exceeding the first cutting structure 110 at the pushing position cannot be too large, i.e., d cannot be too large, otherwise it may cause unstable guidance and the pressure-applying member 430 may easily get stuck when it rebounds. At the same time, d cannot be too small, otherwise it may be unable to push the waste material, affecting the pushing effect. Therefore, d should be moderate. For example, d can be any one of 3mm, 3.5mm, 4mm, 4.5mm, and 5mm, or fall within the range of any two of these values.

[0052] In some embodiments, refer to Figure 5 and Figure 6 The first end 321 of the actuating member 320 is provided with a positioning groove 324, which faces the push rod 310 and is larger than the end of the push rod 310.

[0053] In this embodiment, when the upper mold assembly 10 and the lower mold assembly 20 are closed, the end of the push rod 310 abuts against the positioning groove 324 of the actuating member 320 and lifts the first end 321 of the actuating member 320, thereby ensuring that the lifting action is stable and reliable and avoiding misalignment.

[0054] Optionally, refer to Figure 5 and Figure 6 The positioning groove 324 can be an arc-shaped groove, and the end of the push rod 310 has an arc portion. The arc of the arc-shaped groove is greater than the arc of the arc portion, that is, the positioning groove 324 is larger than the end of the push rod 310.

[0055] Understandably, the positioning groove 324 is larger than the end of the push rod 310, which ensures that during the material dropping process, the end of the push rod 310 can always abut against the positioning groove 324 of the actuating member 320 and drive the actuating member 320 to swing.

[0056] In some embodiments, refer to Figure 5The second end 322 of the actuating member 320 is provided with a rolling member 330, which cooperates with the feeding mechanism 40.

[0057] In this embodiment, the second end 322 of the actuating member 320 rolls against the pressure bearing member 410 through the rolling member 330, replacing sliding friction with rolling friction to reduce resistance and ensure the stability of the pressure application process.

[0058] Specifically, rolled parts can be, but are not limited to, rollers, bearings, etc.

[0059] Similarly, in some embodiments not shown in the figures, the end of the push rod 310 may also be provided with a rolling element 330 that abuts against the positioning groove 324 of the toggle element 320.

[0060] In some embodiments, refer to Figure 3 and Figure 5 The upper mold assembly 10 includes an upper base 120 and a hinge frame 130. The upper base 120 is provided with a receiving groove 121, and the hinge frame 130 is installed in the receiving groove 121. The actuating member 320 is provided in the receiving groove 121 and is hinged to the hinge frame 130.

[0061] In this embodiment, the upper mold assembly 10 is hinged to the hinge portion 323 of the actuating member 320 by setting the hinge frame 130, which facilitates assembly and replacement of the actuating member 320. In addition, the upper base 120 is provided with a receiving groove 121 to accommodate the hinge frame 130 and the actuating member 320, which has a compact structure, improves space utilization, and can avoid interference with other components when the actuating member 320 moves.

[0062] In some embodiments, refer to Figure 1 and Figure 3 The upper mold assembly 10 also includes a hook 140, which is disposed on the upper base 120. The hook 140 covers part of the receiving groove 121 and limits the maximum lifting position of the first end 321 of the toggle member 320.

[0063] In this embodiment, the hanger 140 can be used to connect the upper mold assembly 10 to other devices; in addition, the hanger 140 blocks part of the receiving groove 121 and limits the maximum lifting position of the first end 321 of the toggle member 320, thereby preventing the pressure member 430 from moving down too much and getting stuck when retracting.

[0064] In some embodiments, refer to Figure 1 , Figure 2 , Figure 4 and Figure 7The first cutting structure 110 is disposed on the upper base 120; the lower mold assembly 20 includes a lower base 210 and a second cutting structure 220 disposed on the lower base 210, the second cutting structure 220 being sheared with the first cutting structure 110; the first cutting structure 110 is provided with a relief groove 111, and the pressure member 430 is disposed in the relief groove 111; and / or, the lower base 210 is provided with a material discharge groove 211, the material discharge groove 211 at least covering the projections of the first cutting structure 110 and the pressure member 430 on the lower base 210.

[0065] In this embodiment, the pressure-applying component 430 can retract into the clearance groove 111 of the first cutting structure 110, reducing its volume occupation and avoiding interference with other components. The lower base 210 is provided with a material discharge groove 211 for collecting the waste material pushed down, which is a reasonable design.

[0066] Optionally, the second cutting structure 220 is a bent strip structure, and the first cutting structure 110 is a block structure. When the upper mold assembly 10 and the lower mold assembly 20 are closed, the second cutting structure 220 surrounds a portion of the first cutting structure 110. The edge of the first cutting structure 110 facing the second cutting structure 220 is provided with an upper die cutting edge, and the edge of the second cutting structure 220 facing the first cutting structure 110 is provided with a lower die cutting edge. The upper die cutting edge and the lower die cutting edge are in shearing engagement. Understandably, the second cutting structure 220 also partially surrounds the blanking groove 211.

[0067] Specifically, refer to Figure 1 , Figure 2 , Figure 4 and Figure 7 The upper mold assembly 10 also includes a connecting seat 150 and a pressing member 160. The connecting seat 150 is disposed on the upper base 120, and the pressing member 160 is movably connected to the connecting seat 150. The first cutting structure 110 is fixedly connected to the connecting seat 150, and the pressing member 160 surrounds the first cutting structure 110. When the upper mold assembly 10 and the lower mold assembly 20 are closed, the pressing member 160 and the second cutting structure 220 respectively press against the two sides of the electrode sheet. When the upper mold assembly 10 continues to move downward, the pressing member 160 will retract relative to the first cutting structure 110. Alternatively, the first cutting structure 110 will protrude from the pressing member 160 and partially exceed the second cutting structure 220, thereby cutting the electrode tab.

[0068] In some embodiments, refer to Figure 8The first cutting structure 110 exceeds the maximum dimension of the pressure piece 160 by d1, and satisfies 1mm≤d1≤2mm. It should be noted that if d1 is too small, it will be difficult to cut, affecting the tab forming effect; in addition, since the gap between the first cutting structure 110 and the second cutting structure 220 is small, they are prone to interference. If d2 is too large, it may affect the return process of the first cutting structure 110 and may damage the cutting edge of the first cutting structure 110.

[0069] In some embodiments, refer to Figure 6 The distance between the first end 321 of the actuating member 320 and the hinge portion 323 is a, and the distance between the second end 322 of the actuating member 320 and the hinge portion 323 is b, and the ratio 1:6 ≤ a:b ≤ 1:3 is satisfied.

[0070] In this embodiment, the distances between the first end 321 and the second end 322 of the actuating member 320 and the hinge portion 323 should be appropriate, i.e., the ratio of a to b should be appropriate. If a:b is too large, i.e., b is too small, the pressure torque applied by the second end 322 of the actuating member 320 to the pressure bearing member 410 will be too short, making it difficult to apply pressure. Moreover, when pushing the material, the downward movement distance of the pressure bearing member 430 will be small, which may affect the pushing effect. Conversely, if a:b is too small, i.e., b is too large, the hinge portion 323 of the actuating member 320 will be far from the pressure bearing member 410, occupying a large space. Moreover, when pushing the material, the downward movement distance of the pressure bearing member 430 will be large, which may cause unstable guidance and make it easy for the pressure bearing member 430 to get stuck when it rebounds.

[0071] Optionally, 4mm≤a≤8mm, 20mm≤b≤40mm, and simultaneously satisfy 1:6≤a:b≤1:3.

[0072] In particular, the term "and / or" in this application should be understood as follows:

[0073] In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0074] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;

[0075] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0076] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A tab cutting device, characterized by, It includes an upper mold assembly (10), a lower mold assembly (20), a triggering mechanism (30), and a blanking mechanism (40); The upper mold assembly (10) is used to close or separate from the lower mold assembly (20), and the upper mold assembly (10) is provided with a first cutting structure (110); The blanking mechanism (40) is located on the upper mold assembly (10) and has a pushing position and a retracted position; when the blanking mechanism (40) is in the pushing position, at least a portion of the structure of the blanking mechanism (40) extends beyond the first cutting structure (110); When the upper mold assembly (10) and the lower mold assembly (20) are closed, the triggering mechanism (30) cooperates with the blanking mechanism (40) and causes the blanking mechanism (40) to move to the pushing position.

2. The tab cutting apparatus according to claim 1, characterized by The triggering mechanism (30) includes a push rod (310) and a toggle member (320); The push rod (310) is fixedly mounted on the lower mold assembly (20); The actuating member (320) has a first end (321), a second end (322) and a hinge portion (323), the hinge portion (323) being located between the first end (321) and the second end (322), the hinge portion (323) being hinged to the upper mold assembly (10), and the second end (322) being used to cooperate with the blanking mechanism (40); During the mold closing process of the upper mold assembly (10) and the lower mold assembly (20), the push rod (310) lifts the first end (321) of the actuating member (320), and the second end (322) of the actuating member (320) presses against the blanking mechanism (40) and moves the blanking mechanism (40) to the pushing position.

3. The tab cutting apparatus according to claim 2, characterized by The material feeding mechanism (40) includes a pressure-bearing component (410), a guide rod (420), a pressure-applying component (430), and a reset elastic component (440); The guide rod (420) is movably connected to the upper mold assembly (10). The two ends of the guide rod (420) are respectively connected to the pressure bearing member (410) and the pressure applying member (430). The reset elastic member (440) is disposed between the pressure bearing member (410) and the upper mold assembly (10). When the upper mold assembly (10) and the lower mold assembly (20) are closed, the second end (322) of the actuating member (320) presses against the pressure bearing member (410) and drives the pressure applying member (430) to the pushing position through the guide rod (420); When the upper mold assembly (10) separates from the lower mold assembly (20), the reset elastic element (440) drives the pressure bearing element (410) to reset, and the guide rod (420) drives the pressure applying element (430) to the retracted position.

4. The tab cutting apparatus according to claim 3, characterized by The pressure-applying member (430) extends beyond the maximum dimension d of the first cutting structure (110) at the pushing position, and satisfies 3mm≤d≤5mm.

5. The tab trimming apparatus of claim 2, wherein The first end (321) of the actuating member (320) is provided with a positioning groove (324), the positioning groove (324) faces the top rod (310), and the positioning groove (324) is larger than the end of the top rod (310).

6. The tab trimming apparatus according to claim 2, wherein The second end (322) of the actuating member (320) is provided with a rolling member (330), which cooperates with the feeding mechanism (40).

7. The tab cutting device according to claim 3 or 4, characterized in that, The upper mold assembly (10) includes an upper base (120) and a hinge frame (130). The upper base (120) is provided with a receiving groove (121). The hinge frame (130) is installed in the receiving groove (121). The actuating member (320) is provided in the receiving groove (121) and is hinged to the hinge frame (130).

8. The tab trimming apparatus according to claim 7, wherein The upper mold assembly (10) also includes a hook (140), which is disposed on the upper base (120). The hook (140) partially covers the receiving groove (121) and limits the maximum lifting position of the first end (321) of the toggle member (320).

9. The tab trimming apparatus of claim 7, wherein, The first cutting structure (110) is disposed on the upper base (120); The lower mold assembly (20) includes a lower base (210) and a second cutting structure (220) disposed on the lower base (210), wherein the second cutting structure (220) is shear-fitted with the first cutting structure (110); The first cutting structure (110) is provided with a relief groove (111), and the pressure applying member (430) is provided in the relief groove (111); And / or, the lower base (210) is provided with a material discharge groove (211) that at least covers the projections of the first cutting structure (110) and the pressure member (430) on the lower base (210).

10. The tab trimming apparatus according to any one of claims 2 to 6, characterized by The distance between the first end (321) of the actuating member (320) and the hinge (323) is a, and the distance between the second end (322) of the actuating member (320) and the hinge (323) is b, and the ratio 1:6 ≤ a:b ≤ 1:3 is satisfied.

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