Pressing die

Abstract

The utility model discloses a pressing die, relates to the technical field of vehicle braking, and aims to solve the problem that a die is inconvenient to mount and dismount on a press die frame. According to the pressing die, a lower die punch is arranged on a base; the female die is provided with a cavity used for guiding in pressing materials, the cavity is provided with an upper end opening and a lower end opening, and the lower end opening is slidably connected with the end, away from the base, of the lower punch. During use, one end of the upper punch is inserted into an opening in the upper end of the cavity, the other end of the upper punch is in contact with the press, and when the upper punch is not used, the upper punch is taken out of the cavity and is separated from the press; the elastic reset piece acts on the female die and the base; during use, one end of the demolding rod is in contact connection with one end face, far away from the base, of the female die, and the other end of the demolding rod provides power through the press to extrude the female die to approach the base. The base is arranged on a single press, the pressing work of the single press can be achieved by repeatedly assembling and disassembling the upper punch and the demolding rod, the time for assembling and disassembling the mold is saved, and the mold is convenient to install and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, in particular to a pressing die. Background Art

[0002] With the continuous development of powder metallurgy brake pads, since powder metallurgy brake pads are the main consumable parts in the brake system of electric vehicles, the demand for powder metallurgy brake pads is increasing. Therefore, the pressing efficiency of the brake pad friction body and the time occupied by mold replacement are increasingly required.

[0003] However, the pressing device in the prior art is limited by the structure of the matching installation. It is necessary to connect the upper punch and the demolding rod to the two press drivers respectively, that is, to position the mold on the press mold frame. This process takes time for mold installation and demolding. The process of replacing the mold is cumbersome and it is not easy to achieve rapid replacement of the mold. Utility Model Content

[0004] The utility model aims to provide a pressing die, which is used to facilitate the installation and replacement of the die.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a pressing die, comprising:

[0006] Base;

[0007] A lower die punch is arranged on the base;

[0008] The female mold is provided with a cavity, the cavity has an upper opening and a lower opening, the lower opening is slidably connected to an end of the lower punch away from the base, and the cavity is used to introduce the pressing material;

[0009] The upper punch corresponds to the lower punch. When the upper punch is in use, one end of the upper punch is inserted through the upper opening of the cavity, and the other end of the upper punch is used to contact the press. When the upper punch is not in use, it is taken out of the cavity and is out of contact with the press.

[0010] An elastic reset member, acting on the female mold and the base, and used to apply a force to the female mold away from the base;

[0011] When in use, one end of the demoulding rod is in contact with the end surface of the female mold away from the base, and the other end of the demoulding rod is used to provide power through the press to extrude the female mold toward the base. When not in use, the demoulding rod is removed from the female mold and detached from the press.

[0012] Optionally, in the above-mentioned pressing die, a plurality of cavities are provided, and a plurality of upper punches and lower punches corresponding to the cavities are provided, and the plurality of cavities are arranged at intervals along the circumferential direction;

[0013] Alternatively, a plurality of cavities are arranged in a matrix.

[0014] Optionally, in the above-mentioned pressing mold, the elastic return member includes a rectangular spring.

[0015] Optionally, in the above-mentioned pressing mold, a plurality of elastic return members are arranged around the mold cavity, and the plurality of elastic return members are arranged at intervals along the circumferential direction.

[0016] Optionally, in the above-mentioned pressing mold, a positioning groove is further provided on one end surface of the female mold away from the base, and the positioning groove is used to limit the demoulding rod.

[0017] Optionally, in the above-mentioned pressing mold, a plurality of positioning grooves are provided, and the plurality of positioning grooves are alternately arranged with the elastic return members along the circumferential direction.

[0018] Optionally, in the above-mentioned pressing mold, the female mold comprises:

[0019] An inner core is provided with a cavity;

[0020] The outer sleeve is an annular column, which is coaxially sleeved and fixed with the inner core, the upper end surface of the annular column is in contact with one end of the demoulding rod, and the lower end surface of the annular column is connected to the end of the elastic reset member away from the base.

[0021] Optionally, in the above-mentioned pressing mold, the outer sleeve is provided with a guide hole, the guiding direction of the guide hole is parallel to the axial direction of the outer sleeve, and the pressing mold also includes a guide column, one end of the guide column is inserted into the guide hole and is slidably connected to the female mold, and the other end of the guide column is fixedly connected to the base.

[0022] Optionally, in the above-mentioned pressing mold, the outer sleeve is provided with a limiting groove, the extension direction of the limiting groove is parallel to the axial direction of the outer sleeve, and a through hole is opened at the bottom of the limiting groove. The pressing mold also includes a bolt, the head diameter of the bolt is larger than the diameter of the through hole, and the screw rod of the bolt passes through the through hole and is connected to the base.

[0023] Optionally, in the above pressing mold, the base comprises:

[0024] A connecting plate is fixedly connected to one end of the lower die punch and one end of the elastic reset member respectively;

[0025] The fixing plate is arranged at the bottom of the connecting plate.

[0026] Compared with the prior art, when the above technical solution is adopted, the pressing mold of the present application is first placed on the press table, a certain amount of formula material is poured into the cavity, and then the upper punch is inserted into the cavity, the elastic reset part is in a normal telescopic state, and the press is started at this time, the upper pressing plate descends and gradually contacts and presses the upper punch, so that the upper punch in the cavity gradually approaches the lower punch to compress the formula material into a pressed blank; after pressing and forming, only the upper pressing plate of the press needs to be lifted, so that the upper pressing plate and the upper punch gradually break away from contact, the operator pulls out the upper punch and places a demolding rod on the upper end face of the female mold, and at this time, the press is started again, the upper pressing plate descends, and the upper pressing plate is pressed. The upper platen gradually contacts the demoulding rod, and the upper platen continues to descend, driving the female mold to descend through the demoulding rod. During this process, the elastic reset part is continuously compressed until the lower mold punches through the cavity to eject the compact, and then the compact is removed; finally, the upper platen of the press is lifted, so that the upper platen and the demoulding rod are gradually out of contact. During this process, the female mold is gradually pushed back to its initial state by the elastic reset part, which is the position of the female mold when no formula material is introduced into the cavity. When the upper platen continues to be lifted up and gradually out of contact with the demoulding rod, the press is closed, and the operator removes the demoulding rod from the female mold to complete the reset of the pressing mold. Compared with the traditional installation method of using two presses to drive and connect the upper punch and the demolding rod respectively, and fixing the mold and the press mold frame together, the present application separates the pressing mold from the press independently, and only needs to place the pressing mold on a single press. By repeating the above-mentioned work of installing and removing the upper punch and the demolding rod, the pressing work of the single press can be achieved, saving the time of mold installation and demolding, and facilitating the installation and replacement of the mold. In addition, the pressing molds in the present application can be placed in multiple units in a single press, sharing the single press, and can apply pressure to multiple identical or different pressing molds at the same time, thereby improving the pressing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a pressing die provided in an embodiment of the utility model when pressing a blank;

[0029] Figure 2 It is a structural schematic diagram of a pressing mold provided in an embodiment of the utility model when taking out a embryo;

[0030] Figure 3 A top view of a female mold of a pressing mold provided in an embodiment of the utility model;

[0031] Figure 4 A bottom view of a female mold of a pressing mold provided in an embodiment of the utility model;

[0032] Figure 5 for Figure 2 AA section view;

[0033] Figure 6 for Figure 2 BB section view.

[0034] Reference numerals:

[0035] 1-base; 11-connecting plate; 12-fixing plate; 2-lower punch; 3-female die; 31-inner core; 311-cavity;

[0036] 32-jacket; 321-guide hole; 322-limiting groove; 4-upper punch; 5-elastic reset member; 6-ejection rod; 61-positioning groove; 7-guide column; 8-bolt. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] like Figure 1-Figure 6 As shown, a pressing mold provided by an embodiment of the utility model includes: a base 1, a lower punch 2, a female mold 3, an upper punch 4, an elastic reset member 5 and a demoulding rod 6.

[0043] Among them, the lower punch 2 is arranged on the base 1; the female mold 3 is provided with a cavity 311, the cavity 311 has an upper opening and a lower opening, the lower opening is slidably connected to the end of the lower punch 2 away from the base 1, and the cavity 311 is used to introduce the pressing material; the upper punch 4 corresponds to the lower punch 2, and when the upper punch 4 is in use, one end is inserted through the upper opening of the cavity 311, and the other end of the upper punch 4 is used to contact the press, and when the upper punch 4 is not in use, it is taken out of the cavity 311 and disconnected from the press; the elastic reset member 5 acts on the female mold 3 and the base 1, and the elastic reset member 5 is used to apply a force to the female mold 3 away from the base 1; when the demolding rod 6 is in use, one end is in contact with an end surface of the female mold 3 away from the base 1, and the other end of the demolding rod 6 is used to provide power through the press to extrude the female mold 3 toward the base 1, and when the demolding rod 6 is not in use, it is taken away from the female mold 3 and disconnected from the press.

[0044] When implementing it, Figure 1As shown, first, the pressing mold of the present application is placed on the press table, a certain amount of formula material is poured into the cavity 311, and then the upper punch 4 is inserted into the cavity 311, and the elastic reset member 5 is in a normal telescopic state. At this time, the press is started, and the upper pressing plate descends and gradually contacts and presses the upper punch 4, so that the upper punch 4 in the cavity 311 gradually approaches the lower punch 2 to compress the formula material into a pressed blank; after pressing and forming, it is only necessary to lift the upper pressing plate of the press so that the upper pressing plate and the upper punch 4 are gradually out of contact, and the operator pulls out the upper punch 4 and places a demolding rod 6 on the upper end surface of the female mold 3. At this time, the press is started again, and the upper pressing plate descends and gradually contacts the demolding rod 6 The upper pressing plate continues to descend, driving the female mold 3 to descend through the demoulding rod 6. During this process, the elastic reset part 5 is continuously compressed by the force until the lower die punch 2 passes through the cavity 311 to eject the green billet, and then the green billet is removed; finally, the upper pressing plate of the press is lifted, so that the upper pressing plate and the demoulding rod 6 are gradually out of contact. During this process, the female mold 3 is gradually pushed back to the initial state by the action of the elastic reset part 5, that is, the position of the female mold 3 when no formula material is introduced into the cavity 311. When the upper pressing plate continues to be lifted and gradually out of contact with the demoulding rod 6, the press is closed, and the operator removes the demoulding rod 6 from the female mold 3 to complete the reset work of the pressing mold. Compared with the traditional installation method of using two presses to drive and connect the upper punch 4 and the demolding rod 6 respectively, and fixing the mold and the press mold frame together, the present application separates the pressing mold from the press independently, and only needs to place the pressing mold on a single press. By repeating the above-mentioned work of installing and removing the upper punch 4 and the demolding rod 6, the pressing work of the single press can be achieved, saving the time for mold installation and demolding, and facilitating the installation and replacement of the mold. In addition, the pressing molds in the present application can be placed in multiple units in a single press, sharing the single press, and can be pressurized on multiple identical or different pressing molds at the same time, thereby improving the pressing efficiency.

[0045] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, a plurality of cavities 311 are provided, and a plurality of upper punches 4 and lower punches 2 are provided corresponding to the cavities 311, and the plurality of cavities 311 are arranged at intervals along the circumferential direction. Among them, the cavities 311 can be provided with 2, 3, 4, etc., arranged at intervals along the circumferential direction, and the number of cavities 311 is not specifically limited here. The plurality of cavities 311 arranged along the circumferential direction facilitates the pressing of multiple green sheets at one time, thereby improving the green sheet pressing efficiency of the pressing mold.

[0046] In other embodiments, the plurality of cavities 311 are arranged in a matrix. For example, the plurality of cavities 311 may be arranged in a matrix of three rows and two columns, two rows and four columns, four rows and three columns, etc. The arrangement of the plurality of cavities 311 is not specifically limited, as long as the arrangement of the cavities 311 satisfies the requirement of pressing a plurality of green sheets at one time, thereby improving the green sheet pressing efficiency of the pressing mold.

[0047] Specifically, in this embodiment, the elastic reset member 5 includes a rectangular spring. The elastic reset member 5 may be a rectangular spring or other springs capable of providing elastic force, and the elastic reset member 5 is not specifically limited here. The rectangular spring has a large thickness, strong bearing capacity, good stability, and a long service life, which prolongs the service life of the pressing mold, and ensures that after the lower punch 2 passes through the cavity 311 to eject the pressed blank and remove the pressed blank, the elastic reset member 5 can provide a stable elastic force to gradually push the female mold 3 back to the initial state, thereby improving the structural stability of the pressing mold.

[0048] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, multiple elastic reset members 5 are arranged around the mold cavity 311, and multiple elastic reset members 5 are arranged at intervals along the circumferential direction. Among them, the elastic reset members 5 can be provided with 2, 3, 5, etc., and the number of the elastic reset members 5 is not specifically limited here, as long as the multiple elastic reset members 5 meet the elastic support requirements for the female mold 3, and the multiple elastic reset members 5 are arranged at intervals along the circumferential direction to ensure that the force on the female mold 3 is uniform when the press presses the demoulding rod 6, thereby improving the stability and reliability of the structure of the pressing mold during the pressing and reset process.

[0049] like Figure 3 and Figure 6 As shown, specifically, in this embodiment, a positioning groove 61 is further provided on one end surface of the female mold 3 away from the base 1, and the positioning groove 61 is used to limit the demoulding rod 6. After the operator inserts one end of the demoulding rod 6 into the positioning groove 61, the press is started, and the upper pressing plate descends and gradually contacts the demoulding rod 6. The upper pressing plate continues to descend and drives the female mold 3 to descend through the demoulding rod 6. The positioning groove 61 has a limiting effect on the demoulding rod 6, reducing the risk of relative misalignment between the upper pressing plate, the demoulding rod 6 and the female mold 3 during the descent of the press, and improving the reliability and stability of the pressing mold structure.

[0050] Specifically, in this embodiment, a plurality of positioning grooves 61 are provided, and the plurality of positioning grooves 61 are arranged alternately with the elastic reset member 5 along the circumferential direction. Exemplarily, the positioning grooves 61 may be provided with 2, 3, 5, etc., and the number of positioning grooves 61 is not specifically limited here, as long as the plurality of positioning grooves 61 are arranged alternately with the elastic reset member 5 along the circumferential direction. The positioning grooves 61 and the elastic reset member 5 are arranged alternately, so that the downward extrusion force of the demoulding rod 6 on the female mold 3 and the upward elastic force of the elastic reset member 5 under pressure are evenly distributed in the circumferential direction.

[0051] like Figure 3 and Figure 4As shown, specifically, in this embodiment, the female mold 3 includes: an inner core 31 and an outer sleeve 32, the inner core 31 is provided with a cavity 311; the outer sleeve 32 is an annular cylinder, the annular cylinder is coaxially sleeved and fixed with the inner core 31, the upper end surface of the annular cylinder is in contact with and connected to one end of the demolding rod 6, and the lower end surface of the annular cylinder is connected to the end of the elastic reset member 5 away from the base 1.

[0052] During operation, a certain amount of formula material is poured into the mold cavity 311, and then the upper die punch 4 is inserted into the mold cavity 311 of the core 31 located in the central area. The elastic reset member 5 is in a normal telescopic state, and the press is started to make the upper pressing plate descend and gradually contact and press the upper die punch 4. In the mold cavity 311, the upper die punch 4 is constantly approaching the lower die punch 2 to compress the formula material into a pressed blank. After the pressing is completed, the upper pressing plate of the press is lifted and gradually disengaged from the upper die punch 4. The operator pulls out the upper die punch 4 and presses it at the upper end of the outer sleeve 32. Place the demoulding rod 6 on the surface, start the press again to make the upper pressing plate contact the demoulding rod 6, and the upper pressing plate continues to descend, driving the outer sleeve 32 and the inner core 31 to descend together through the demoulding rod 6. During this process, the elastic reset member 5 is continuously compressed by force until the lower die punch 2 passes through the cavity 311 to eject the pressed blank, and then the pressed blank is removed; finally, lift the upper pressing plate of the press, so that the upper pressing plate and the demoulding rod 6 are gradually separated, and the outer sleeve 32 is gradually pushed back to the initial state by the action of the elastic reset member 5 to drive the inner core 31. The inner core 31 and the outer sleeve 32 are fixed together, which facilitates the installation and disassembly of the pressing mold and improves the flexibility of the pressing mold.

[0053] like Figure 6 As shown, specifically, in this embodiment, the sleeve 32 is provided with a guide hole 321, and the guiding direction of the guide hole 321 is parallel to the axial direction of the sleeve 32. The pressing mold also includes a guide column 7, one end of the guide column 7 is inserted into the guide hole 321 and is slidably connected to the female mold 3, and the other end of the guide column 7 is fixedly connected to the base 1.

[0054] During operation, the guide hole 321 provides a guiding function for the guide column 7. When the female mold 3 is pushed by the demoulding rod 6, the guide column 7 slides relative to the female mold 3 along the guide of the guide hole 321, so that the female mold 3 gradually approaches along the guide of the guide hole 321; when the female mold 3 rebounds due to the elastic force of the elastic reset member 5, the guide column 7 slides relative to the female mold 3 along the guide of the guide hole 321, so that the female mold 3 gradually moves away from the base 1 along the guide of the guide hole 321 and returns to the initial position. The sliding cooperation between the guide hole 321 and the guide column 7 reduces the risk of misalignment between the female mold 3, the upper punch 4 and the lower punch 2 during the demoulding and reset process of the female mold 3, and improves the structural stability and reliability of the pressing mold.

[0055] like Figure 4 and Figure 5As shown, specifically, in this embodiment, the outer sleeve 32 is provided with a limiting groove 322, the extension direction of the limiting groove 322 is parallel to the axial direction of the outer sleeve 32, and a through hole is opened at the bottom of the limiting groove 322. The pressing mold also includes a bolt 8, the head diameter of the bolt 8 is larger than the diameter of the through hole, and the screw of the bolt 8 passes through the through hole and is connected to the base 1. The head of the bolt 8 contacts the bottom of the limiting groove 322, and the screw of the bolt 8 passes through the through hole at the bottom of the limiting groove 322 and is connected to the base 1. After the work of removing the pressed blank is completed, the pressed blank is removed, and the upper pressing plate of the press is lifted, so that the upper pressing plate and the demoulding rod 6 are gradually out of contact. In this process, the female mold 3 is gradually pushed back by the elastic reset member 5. In this process, the head of the bolt 8 contacts the bottom of the limiting groove 322, and the female mold 3 is limited to continue to rebound due to inertia after being elastically acted, thereby ensuring the structural reliability of the pressing mold.

[0056] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, the base 1 includes: a connecting plate 11 and a fixing plate 12, the connecting plate 11 is fixedly connected to one end of the lower punch 2 and one end of the elastic reset member 5 respectively; the fixing plate 12 is arranged at the bottom of the connecting plate 11. Placing the fixing plate 12 at the bottom of the connecting plate 11 increases the thickness of the base 1, ensures the supporting strength of the base 1 to the overall structure, and improves the structural stability and reliability of the pressing mold. Exemplarily, the fixing plate 12 and the connecting plate 11 can be connected by welding, threading or other methods that can achieve fixed connection, and the connection method between the fixing plate 12 and the connecting plate 11 is not specifically limited here.

[0057] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pressing die, characterized in that: include: Base; A lower die punch is arranged on the base; The female mold is provided with a cavity, the cavity has an upper opening and a lower opening, the lower opening is slidably connected to an end of the lower punch away from the base, and the cavity is used to introduce a pressing material; An upper punch, corresponding to the lower punch, wherein one end of the upper punch is inserted through the upper opening of the cavity when in use, and the other end of the upper punch is used to contact the press, and when not in use, the upper punch is taken out of the cavity and is out of contact with the press; An elastic reset member, acting on the female mold and the base, and the elastic reset member is used to apply a force to the female mold away from the base; When in use, one end of the demoulding rod is in contact and connected with an end surface of the female mold away from the base, and the other end of the demoulding rod is used to provide power through the press to squeeze the female mold toward the base. When not in use, the demoulding rod is removed from the female mold and detached from the press.

2. The pressing die according to claim 1, characterized in that There are a plurality of cavities, and a plurality of upper punches and lower punches corresponding to the cavities are provided, and the plurality of cavities are arranged at intervals along the circumferential direction; Alternatively, the plurality of cavities are arranged in a matrix.

3. The pressing die according to claim 1, characterized in that The elastic return member comprises a rectangular spring.

4. The pressing die according to claim 1, characterized in that A plurality of elastic return members are arranged around the cavity, and the plurality of elastic return members are arranged at intervals along the circumferential direction.

5. The pressing die according to claim 1, characterized in that A positioning groove is also provided on one end surface of the female mold away from the base, and the positioning groove is used to limit the demoulding rod.

6. The pressing die according to claim 5, characterized in that A plurality of positioning grooves are provided, and the plurality of positioning grooves are arranged alternately with the elastic return members along the circumferential direction.

7. The pressing die according to claim 1, characterized in that The female mold comprises: An inner core provided with the cavity; The outer sleeve is an annular cylinder, which is coaxially sleeved and fixed with the inner core, the upper end surface of the annular cylinder is in contact with and connected to one end of the demoulding rod, and the lower end surface of the annular cylinder is connected to one end of the elastic reset member away from the base.

8. The pressing die according to claim 7, characterized in that The outer sleeve is provided with a guide hole, the guide direction of the guide hole is parallel to the axial direction of the outer sleeve, and the pressing mold also includes a guide column, one end of the guide column penetrates into the guide hole and is slidably connected to the female mold, and the other end of the guide column is fixedly connected to the base.

9. The pressing die according to claim 7, characterized in that The outer sleeve is provided with a limiting groove, the extension direction of the limiting groove is parallel to the axial direction of the outer sleeve, and a through hole is opened at the bottom of the limiting groove. The pressing mold also includes a bolt, the head diameter of the bolt is larger than the diameter of the through hole, and the screw rod of the bolt passes through the through hole to be connected with the base.

10. The pressing die according to claim 1, characterized in that The base comprises: A connecting plate, fixedly connected to one end of the lower punch and one end of the elastic return member respectively; The fixing plate is arranged at the bottom of the connecting plate.

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