Button cell negative electrode punch forming die

Abstract

The utility model belongs to the technical field of button cell cathode cover production, and particularly relates to a button cell cathode punch forming die which comprises a lower die assembly, an upper die assembly, a lower die plate and a guide rail rod, the upper die assembly is arranged on the upper die plate, the lower die assembly is arranged below the upper die assembly and on the lower die plate, and the guide rail rod is arranged on the guide rail rod. The four guide rail rods are distributed at the four corners between the upper die plate and the lower die plate. According to the utility model, the efficient and continuous production of the button cell negative plate is realized through the cooperation of the lower die assembly and the upper die assembly. And when the upper mold assembly returns, a spring telescopic rod in the lower mold assembly automatically pushes an upper push plate and an ejection shaft to stably eject the formed negative pole piece, so that automatic demolding is realized. According to the structural design, integrated continuous operation of die cutting and stamping is achieved, the production efficiency is improved, and meanwhile the quality defect caused by material transfer in a traditional technology is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of button battery negative electrode cover production technology, specifically relating to a button battery negative electrode stamping mold. Background Technology

[0002] In the manufacturing process of button cell negative electrode sheets, the stamping process is a crucial step determining product quality and production efficiency. The currently prevalent secondary processing method of die-cutting followed by stamping has significant technical drawbacks: First, this process requires cutting raw materials into circular sheets using die-cutting equipment before transferring them to stamping equipment for forming. This segmented processing method not only increases production steps but also easily causes deformation and contamination of the sheets during transfer, affecting product quality consistency. Second, due to structural design flaws in traditional stamping dies, the formed negative electrode sheets are prone to becoming stuck inside the die cavity. Operators must manually remove them using tools such as tweezers, increasing operational difficulty and safety risks, and easily causing scratches during removal, leading to a higher scrap rate. These problems are particularly pronounced in mass production scenarios: on the one hand, the process connection issues caused by secondary processing make it difficult to increase production cycle time, restricting capacity release; on the other hand, manual sheet removal becomes a bottleneck for production line automation. Therefore, a new button cell negative electrode stamping die is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a stamping mold for the negative electrode of a button battery, which can solve the above-mentioned technical problems.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] This utility model provides a button cell negative electrode stamping mold, including a lower mold assembly, an upper mold assembly, a lower template, and guide rails. The upper mold assembly is disposed on the upper template, and the lower mold assembly is disposed below the upper mold assembly and on the lower template. The guide rails are four in number and distributed at the four corners between the upper template and the lower template.

[0006] The lower mold assembly includes a cavity block, an upper push plate, an ejector shaft, and a die-cutting ring. The cavity block is fixedly installed on the lower mold plate. The upper push plate is movably disposed inside the cavity block. The die-cutting ring passes through the top plate of the cavity block and communicates with its interior. The ejector shaft is slidably sleeved inside the die-cutting ring, and its lower side is fixedly installed on the upper push plate. Four spring telescopic rods are provided inside the cavity block. The upper side of the spring telescopic rods is installed on the bottom surface of the upper push plate, and its lower side abuts against the inner bottom surface of the cavity block. A limiting plate is provided on the side of the cavity block, and the limiting plate is detachably installed on one side of the upper push plate. A long strip plate that engages with the side of the cavity block is integrally provided on the other side of the upper push plate.

[0007] Using the above-mentioned button battery negative electrode stamping die, the upper die assembly moves down under the drive of hydraulic equipment. First, the material is precisely die-cut by the outer cutting ring. Then, the adjusting shaft rotates and positions, driving the secondary pressing plate to drive the indented pressing rod to perform secondary stamping. After stamping is completed, when the upper die assembly returns, the spring telescopic rod automatically pushes the ejection mechanism to smoothly eject the formed negative electrode sheet, realizing automated continuous production.

[0008] Preferably, the upper mold assembly includes a lower pressure plate, a secondary pressure plate, an indented pressure rod, and an adjusting shaft. The lower pressure plate is fixedly installed on the surface of the upper plate. The secondary pressure plate is disposed between the upper plate and the lower pressure plate. The indented pressure rod is fixedly installed on the bottom surface of the secondary pressure plate and slidably sleeved inside the outer cutting ring. The outer cutting ring is installed through the upper plate and corresponds vertically to the die-cutting ring.

[0009] Preferably, the outer circumferential ring moves down and engages with the die-cutting ring, and the inner recessed die rod moves down and engages with the inner wall of the die-cutting ring, with the gap between the two set to 1.2 times the thickness of the stamping material.

[0010] Preferably, the adjusting shaft is positioned above the lower pressure plate and is movably fitted inside the wrapping sleeve. The wrapping sleeve is fixedly installed on the surface of the lower pressure plate. Two lugs are provided inside the wrapping sleeve, and the lugs cooperate with the inner sleeve of the lug hole. The adjusting shaft matches the inner sleeve of the through-hole on the lower pressure plate. The lugs are symmetrically opened on the inner wall of the hole. A bearing sleeve is rotatably installed on the upper side of the adjusting shaft, and an mounting sleeve is fixedly installed on the upper side of the bearing sleeve.

[0011] Preferably, a retaining ring is provided on the upper inner side of the sleeve to prevent the adjustment axis from detaching from the sleeve.

[0012] Preferably, multiple push rods are provided between the lower pressure plate and the upper template. The lower side of the push rod is fixedly installed on the surface of the upper template, and its upper side slides through the secondary pressure plate and abuts against the bottom surface of the lower pressure plate. Multiple push springs are provided between the secondary pressure plate and the upper template, and the push springs are sleeved on the push rods.

[0013] The beneficial effects are:

[0014] 1. This utility model achieves efficient and continuous production of button cell negative electrode sheets through the coordinated operation of the lower and upper mold assemblies. Specifically, the lower pressure plate in the upper mold assembly moves downward under the drive of hydraulic equipment, first driving the outer cutting ring to precisely die-cut the raw material into a standard circular sheet; then, through precise control of the adjusting shaft, the secondary pressing plate drives the indented pressing rod to perform a secondary stamping forming on the die-cut sheet, forming a negative electrode sheet structure that meets the requirements within the die-cutting ring. After stamping is completed, when the upper mold assembly returns, the spring telescopic rod in the lower mold assembly automatically pushes the upper push plate and the ejector shaft to smoothly eject the formed negative electrode sheet, achieving automatic demolding. This structural design realizes integrated continuous operation of die-cutting and stamping, improving production efficiency while avoiding quality defects caused by material transfer in traditional processes.

[0015] 2. This utility model, through the optimized linkage design of the spring telescopic rod, upper push plate, and ejector shaft in the lower mold assembly, ensures that the formed negative electrode sheet is smoothly and completely ejected from the die-cutting ring. The precise stroke control of the ejection mechanism ensures uniform distribution of the demolding force, effectively solving problems such as product sticking and deformation in traditional molds, and significantly improving production stability and product consistency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the lower mold assembly structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the lower mold assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the other side of the lower mold assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the upper mold component structure of this utility model;

[0021] Figure 6 This is an exploded structural diagram of the upper mold component of this utility model;

[0022] Figure 7 This is a top view of the exploded structure of the upper mold component of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Lower mold assembly; 11. Cavity block; 12. Upper push plate; 12a. Restriction plate; 13. Spring telescopic rod; 14. Ejector shaft; 15. Die-cutting ring; 16. Baffle; 2. Upper template; 2a. Outer cutting ring; 3. Upper mold assembly; 31. Lower pressure plate; 31a. Ear hole; 32. Secondary pressure plate; 33. Inward pressure rod; 34. Ejector rod; 35. Upper push spring; 36. Envelope sleeve; 37. Adjusting shaft; 37a. Ear block; 38. Bearing sleeve; 39. Mounting sleeve; 4. Guide rail rod; 5. Lower template. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figure 1-7 As shown, a button cell negative electrode stamping die includes a lower die assembly 1, an upper die assembly 3, a lower template 5, and guide rails 4. The upper die assembly 3 is disposed on the upper template 2, and the lower die assembly 1 is disposed below the upper die assembly 3 and on the lower template 5. The guide rails 4 are four in number and distributed at the four corners between the upper template 2 and the lower template 5. The guide rails 4 are inner sliding telescopic rods, thereby aligning the movement trajectory of the upper die assembly 3 with that of the lower die assembly 1 and improving the cooperation effect between the upper die assembly 3 and the lower die assembly 1.

[0027] The lower mold assembly 1 includes a cavity block 11, an upper push plate 12, an ejector shaft 14, and a die-cutting ring 15. The cavity block 11 is fixedly installed on the lower mold plate 5. The upper push plate 12 is movably disposed inside the cavity block 11. The die-cutting ring 15 passes through the top plate of the cavity block 11 and communicates with its interior. The ejector shaft 14 is slidably sleeved inside the die-cutting ring 15, and its lower side is fixedly installed on the upper push plate 12. Four spring telescopic rods 13 are provided inside the cavity block 11. The upper side of the spring telescopic rods 13 is installed on the bottom surface of the upper push plate 12, and its lower side abuts against the inner bottom surface of the cavity block 11. A limiting plate 12a is provided on the side of the cavity block 11, and the limiting plate 12a is detachably installed on one side of the upper push plate 12. A long strip plate that engages with the side of the cavity block 11 is integrally provided on the other side of the upper push plate 12.

[0028] As an optional implementation, the upper mold assembly 3 includes a lower pressure plate 31, a secondary pressure plate 32, an indented pressure rod 33, and an adjusting shaft 37. The lower pressure plate 31 is fixedly installed on the surface of the upper template 2. The secondary pressure plate 32 is disposed between the upper template 2 and the lower pressure plate 31. The indented pressure rod 33 is fixedly installed on the bottom surface of the secondary pressure plate 32 and is slidably sleeved in the outer cutting ring 2a. The outer cutting ring 2a is installed through the upper template 2 and corresponds vertically with the die-cutting ring 15, thereby improving the insertion and engagement effect of the upper mold assembly 3 after it moves down.

[0029] See attached document Figure 3 and attached Figure 6 After the outer circumferential ring 2a moves down, it is inserted into the die-cutting ring 15. After the inner circumferential pressing rod 33 moves down, it is inserted into the inner wall of the die-cutting ring 15. The gap between the two is set to 1.2 times the thickness of the stamping material. This design ensures that the material can flow and form evenly during the stamping process.

[0030] Furthermore, the adjusting shaft 37 is positioned above the lower pressure plate 31 and is movably fitted inside the enclosing sleeve 36. The enclosing sleeve 36 is fixedly installed on the surface of the lower pressure plate 31. Two ear blocks 37a are provided inside the enclosing sleeve 36, and the ear blocks 37a are fitted with the inner sleeve of the ear hole 31a. The adjusting shaft 37 is matched with the inner sleeve of the circular hole that is opened through the lower pressure plate 31. The ear holes 31a are symmetrically opened on the inner wall of the circular hole. A bearing sleeve 38 is rotatably installed on the upper side of the adjusting shaft 37. An mounting sleeve 39 is fixedly installed on the upper side of the bearing sleeve 38. The mounting sleeve 39 is fixedly connected to the output shaft of the hydraulic equipment.

[0031] Furthermore, a retaining ring is provided on the upper side of the inner sleeve 36 to restrict the adjusting shaft 37 from detaching from the sleeve 36, and to control the maximum axial travel of the adjusting shaft 37 to ensure the safe reset of the upper mold assembly 3. Baffles 16 are installed on both sides of the surface of the cavity block 11 to limit the stamping material.

[0032] Furthermore, multiple push rods 34 are provided between the lower pressure plate 31 and the upper template 2. The lower side of the push rod 34 is fixedly installed on the surface of the upper template 2, and its upper side slides through the secondary pressure plate 32 and abuts against the bottom surface of the lower pressure plate 31. Multiple push springs 35 are provided between the secondary pressure plate 32 and the upper template 2, and the push springs 35 are sleeved on the push rods 34 to form an elastic reset mechanism to cope with continuous downward movement.

[0033] With the above structure, during operation: the upper die assembly 3 moves downward under the drive of the hydraulic equipment, and first completes the precision die cutting of the material through the outer cutting ring 2a; then the adjusting shaft 37 rotates and positions, driving the secondary pressing plate 32 to drive the indented pressing rod 33 to perform secondary stamping; after the stamping is completed, when the upper die assembly 3 returns, the spring telescopic rod 13 automatically pushes the ejection mechanism to smoothly eject the formed negative electrode sheet, realizing automated continuous production.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, and is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, are implemented according to conventional methods in the field.

Claims

1. A stamping die for a button cell negative electrode, characterized in that: It includes a lower mold assembly (1), an upper mold assembly (3), a lower template (5), and guide rails (4). The upper mold assembly (3) is set on the upper template (2), the lower mold assembly (1) is set below the upper mold assembly (3) and on the lower template (5), and the guide rails (4) are four in number and distributed at the four corners between the upper template (2) and the lower template (5). The lower mold assembly (1) includes a cavity block (11), an upper push plate (12), an ejector shaft (14), and a die-cutting ring (15). The cavity block (11) is fixedly installed on the lower mold plate (5). The upper push plate (12) is movably disposed inside the cavity block (11). The die-cutting ring (15) passes through the top plate of the cavity block (11) and communicates with its interior. The ejector shaft (14) is slidably sleeved inside the die-cutting ring (15), and its lower side is fixedly installed on the upper push plate (12). The cavity block (11) is provided with four spring telescopic rods (13). The upper side of the spring telescopic rods (13) is installed on the bottom surface of the upper push plate (12), and the lower side abuts against the inner bottom surface of the cavity block (11). The cavity block (11) is provided with a limiting plate (12a) on its side, and the limiting plate (12a) is detachably installed on one side of the upper push plate (12). The other side of the upper push plate (12) is integrally provided with a long strip plate that engages with the side of the cavity block (11).

2. The button cell negative electrode stamping die according to claim 1, characterized in that: The upper mold assembly (3) includes a lower pressure plate (31), a secondary pressure plate (32), an indented pressure rod (33), and an adjusting shaft (37). The lower pressure plate (31) is fixedly installed on the surface of the upper mold plate (2). The secondary pressure plate (32) is set between the upper mold plate (2) and the lower pressure plate (31). The indented pressure rod (33) is fixedly installed on the bottom surface of the secondary pressure plate (32) and slidably sleeved in the outer cutting ring (2a). The outer cutting ring (2a) is installed through the upper mold plate (2) and corresponds vertically to the die-cutting ring (15).

3. The button cell negative electrode stamping die according to claim 2, characterized in that: After the outer circumferential ring (2a) moves down, it is inserted into the die-cutting ring (15). After the inner circumferential pressing rod (33) moves down, it is inserted into the inner wall of the die-cutting ring (15). The gap between the two is set to 1.2 times the thickness of the stamping material.

4. The button cell negative electrode stamping die according to claim 3, characterized in that: The adjusting shaft (37) is located above the lower pressure plate (31) and is movably sleeved inside the wrapping sleeve (36). The wrapping sleeve (36) is fixedly installed on the surface of the lower pressure plate (31). Two ear blocks (37a) are provided inside the wrapping sleeve (36), and the ear blocks (37a) are fitted with the inner sleeve of the ear hole (31a). The adjusting shaft (37) is matched with the inner sleeve of the circular hole that is opened through the lower pressure plate (31). The ear holes (31a) are symmetrically opened on the inner wall of the circular hole. A bearing sleeve (38) is rotatably installed on the upper side of the adjusting shaft (37), and an mounting sleeve (39) is fixedly installed on the upper side of the bearing sleeve (38).

5. The button cell negative electrode stamping die according to claim 4, characterized in that: The upper inner side of the sleeve (36) is provided with a retaining ring to prevent the adjusting shaft (37) from detaching upward from the sleeve (36).

6. The button cell negative electrode stamping die according to claim 5, characterized in that: Multiple top rods (34) are provided between the lower pressure plate (31) and the upper template (2). The lower side of the top rod (34) is fixedly installed on the surface of the upper template (2), and its upper side slides through the secondary pressure template (32) and abuts against the bottom surface of the lower pressure plate (31). Multiple push springs (35) are provided between the secondary pressure template (32) and the upper template (2), and the push springs (35) are sleeved on the top rods (34).

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