A material ejection mechanism for a semi-shear forming mold and a semi-shear forming mold

Abstract

This utility model provides a material ejection mechanism for a semi-shear forming mold and a semi-shear forming mold, belonging to the field of mold technology. The material ejection mechanism includes an inner ejector block, which is movably disposed within the forming cavity, and the direction of movement of the inner ejector block is along the opening and closing direction of the mold. A force transmission rod is provided on the inner ejector block, one end of which penetrates through the top of the forming cavity; an elastic element is also provided between the bottom of the inner ejector block and the forming cavity. This mechanism can assist in the ejection of the semi-shear forming mold, thereby reducing product defects in semi-shear forming processing and improving the product qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a material ejection mechanism for a semi-shear forming mold and a semi-shear forming mold. Background Technology

[0002] Semi-shear forming of sheet metal parts is a common forming process. Also known as semi-punching or semi-shear forming, it works by using a punch to cut into the material to a certain depth, typically between 30% and 70% of the material thickness. This partially cuts or compresses the sheet metal, creating localized protrusions or depressions while maintaining the overall continuity of the material. In traditional semi-shear forming, the ejection method involves designing an inner ejector block within the die cavity. Specifically, during die opening, the inner ejector block is flush with the lower die surface; during punching, the punch presses down on the inner ejector block as it moves downwards, compressing the spring at the bottom of the inner ejector block.

[0003] However, this material removal method has a significant drawback: when the punch is lifted after the mold is formed, the pressure plate still holds the product down, while the inner ejector block has already pushed the material upwards under the spring force, causing the semi-shear forming feature to be reversed. This reverse force can easily cause deformation or defects in the parts, especially for thin-film products, where the defects are more pronounced due to the weaker material rigidity.

[0004] Therefore, it is necessary to improve the existing semi-shear forming mold to overcome the shortcomings of the existing technology. Utility Model Content

[0005] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide a material ejection mechanism for a semi-shear forming mold. This mechanism can assist in the ejection of the semi-shear forming mold, thereby reducing product defects in the semi-shear forming process and improving the product qualification rate.

[0006] A material ejection mechanism for a semi-shear forming mold includes:

[0007] An inner ejector block is movably disposed in the forming cavity, and the direction of movement of the inner ejector block is set along the opening and closing direction of the mold; a force transmission rod is provided on the inner ejector block, and one end of the force transmission rod passes through the top of the forming cavity;

[0008] An elastic element is also provided between the bottom of the inner top block and the forming die.

[0009] In traditional semi-shear forming dies, the ejection method involves the pressure plate still holding the product down when the punch is lifted after die forming. Meanwhile, the ejector pin, under spring force, pushes the material upwards, easily causing the semi-shear forming feature to be pushed upwards, resulting in part defects, especially for thin-walled products where the parts are less rigid. In this embodiment, the ejection mechanism of the semi-shear forming die incorporates a "T"-shaped inner ejector block in the punching die, with a force transmission rod pressing against the ejector plate. When the punch is lifted after die forming, the pressure plate continues to hold the inner ejector block against the spring force, counteracting the spring force and preventing the inner ejector block from pushing against the product. This avoids the product defects caused by reverse pushing in traditional ejection methods.

[0010] By reducing product defects caused by the material return process, the quality of the produced products is more stable and reliable, thereby improving the product qualification rate, reducing production costs, increasing production efficiency, and bringing greater economic benefits to the enterprise. Furthermore, this semi-shear forming mold material return mechanism is applicable to all semi-shear forming production processes, has wide applicability, and can meet the semi-shear forming processing needs of sheet metal parts of different sizes, shapes, and materials, exhibiting high versatility and practicality.

[0011] In a preferred embodiment of this invention, 2 to 6 force transmission rods are provided on the top block, and each force transmission rod is evenly distributed on the inner top block along the circumference of the inner top block.

[0012] By setting 2 to 6 force transmission rods on the inner ejector block and distributing them evenly along its circumference, the force exerted by the upper die pressure plate can be uniformly transmitted to the inner ejector block. This uniform force transmission method avoids the problems of deformation of the inner ejector block or uneven product ejection caused by uneven local force distribution, thus improving the stability and reliability of the ejection process.

[0013] Specifically, the number of force transmission rods can be adjusted according to the size of the mold and the complexity of the product, allowing the unloading mechanism to adapt to semi-shear forming molds of different sizes and shapes. This flexibility makes mold design more flexible and can meet the needs of more production scenarios.

[0014] In a preferred embodiment of this invention, two to four elastic elements are provided between the inner top block and the forming die.

[0015] By placing two to four elastic elements between the inner ejector block and the forming die, and distributing them evenly along the circumference of the inner ejector block, the inner ejector block is subjected to uniform force during the ejection process. This uniform force distribution avoids problems such as unstable movement of the inner ejector block or uneven product ejection caused by uneven local force distribution, thus improving the stability and reliability of the ejection process. Furthermore, the number of elastic elements can be adjusted according to the size of the mold and the complexity of the product, allowing the ejection mechanism to adapt to semi-shear forming molds of different sizes and shapes. This flexibility makes mold design more flexible and can meet the needs of more production scenarios.

[0016] In a preferred embodiment of this invention, the forming die is provided with an installation groove, which includes a first groove and a second groove that are interconnected. The first groove is disposed on one side of the second groove and penetrates the top of the forming die. In the longitudinal section direction of the forming die, the width of the first groove is smaller than the width of the second groove.

[0017] The inner top block is disposed in the mounting groove and is adapted to the mounting groove.

[0018] The difference in width between the first and second grooves allows the inner ejector block to be positioned more precisely in the forming die. The upper part of the inner ejector block is narrower, allowing it to be smoothly inserted into the first groove; the lower part is wider, allowing it to be stably placed in the second groove, ensuring that the inner ejector block moves smoothly in the predetermined direction during the mold opening and closing process.

[0019] The matching design between the inner top block and the mounting groove ensures that the inner top block is subjected to uniform force during the material ejection process, avoiding problems such as unstable movement of the inner top block or uneven material ejection caused by uneven local force.

[0020] More specifically, the first and second grooves are connected to form a T-shaped groove structure, which can also limit the excessive movement of the inner top block, thereby preventing damage to the product during the mold opening process.

[0021] In a preferred embodiment of this utility model, a force rod receiving groove is provided on the forming die, the force rod receiving groove is located above the inner top block, and the force transmission rod is located in the force rod receiving groove;

[0022] Along the axial direction of the force rod receiving groove, the width of the bottom of the force rod receiving groove is greater than the width of the top of the force rod receiving groove; the force transmission rod is adapted to the structure of the force rod receiving groove.

[0023] In a preferred embodiment of this invention, a connecting post is provided on the inner top block, and the force transmission rod is detachably connected to the connecting post.

[0024] The force transmission rod and the connecting post on the inner top block are detachably connected, facilitating the installation and replacement of the force transmission rod. This design makes mold maintenance more convenient and quick, reducing downtime caused by force transmission rod damage. The bottom width of the force transmission rod receiving groove is wider than the top width, which facilitates the insertion and positioning of the force transmission rod, and at the same time, it can better disperse stress during force transmission, avoiding damage to the force transmission rod due to stress concentration.

[0025] The second objective of this utility model is to provide a semi-shear forming mold, including the semi-shear forming mold ejection mechanism as described above.

[0026] In a preferred embodiment of this invention, the device includes an upper die structure and a lower die structure. The upper die structure includes an upper die base, an upper clamping plate, and an upper die pressure plate. The upper clamping plate is disposed at the bottom of the upper die base, and the upper die pressure plate is disposed at the bottom of the upper clamping plate. A pressure plate spring is disposed in the upper die base, with one end of the pressure plate spring fixed to the upper die base and the other end passing through the upper clamping plate and abutting against the upper die pressure plate. A semi-shear forming punch is also disposed in the upper die pressure plate.

[0027] The lower mold structure includes a lower mold base and a forming die. The forming die is fixed on the lower mold base, the inner top block is disposed in the forming die, and one end of the force transmission rod passes through the forming die and abuts against the upper mold pressure plate.

[0028] Specifically, the upper die pressure plate is used to press the sheet material firmly during the forming process to prevent the sheet material from moving during the punching process.

[0029] The pressure plate spring is installed in the upper die holder, with one end fixed to the upper die holder and the other end passing through the upper clamping plate and abutting against the upper die pressure plate. The pressure plate spring is compressed when the die is closed and releases energy when the die is opened, pushing the upper die pressure plate downward. The semi-shear forming punch is used for semi-shear forming operations on the sheet material.

[0030] The lower mold base serves as the bottom frame of the mold, providing a foundation for mounting and supporting other components.

[0031] The forming die is fixed on the lower die base and is used to hold the sheet material and perform a semi-shear forming operation.

[0032] In a preferred embodiment of this invention, the upper mold base is provided with a pressure plate equalization sleeve. One end of the pressure plate equalization sleeve is fixed on the upper mold base, and the other end passes through the upper clamping plate and is movably connected to the upper mold pressure plate, so that the upper mold pressure plate can move up and down along the axial direction of the pressure plate equalization sleeve.

[0033] In a preferred embodiment of this utility model, the pressure plate equal-height sleeve includes a cylindrical shell and a guide rod. The cylindrical shell is fixed on the upper mold base, and the guide rod is disposed in the cylindrical shell. One end of the guide rod passes through the cylindrical shell and extends into the upper mold pressure plate.

[0034] The upper die pressing plate is provided with a guide hole, the inner diameter of which is adapted to the guide rod, and the inner diameter of the guide rod is smaller than the outer diameter of the cylindrical shell.

[0035] The design of the fixed-length sleeve ensures that the upper mold pressure plate can only move upwards to the bottom of the sleeve during mold opening, avoiding excessive movement that could lead to uncontrolled material ejection. The cylindrical structure and the sleeve hole provide guidance for the pressure plate, preventing it from shifting during movement and ensuring uniform pressure from the force transmission rod on the inner ejector block.

[0036] The beneficial effects of this utility model are as follows:

[0037] This utility model provides a material ejection mechanism for a semi-shear forming mold. The mechanism includes an inner ejector block, which is movably disposed within the forming die, with its movement direction aligned with the mold's opening and closing direction. A force transmission rod is mounted on the inner ejector block, one end of which penetrates the top of the forming die. An elastic element is also provided between the bottom of the inner ejector block and the forming die. This mechanism assists in the ejection of the semi-shear forming mold, thereby reducing product defects during the semi-shear forming process and improving the product qualification rate. When the semi-shear forming mold is completed and opened, the upper die begins to move upwards, and the semi-shear forming punch, fixed to the upper clamping plate, moves upwards along with the upper die. During the upward movement of the upper die, the pressure plate spring gradually resets, but the pressure plate continues to press against the T-shaped inner ejector block via the force transmission rod, further counteracting the spring force and preventing the inner ejector block from exerting a reverse force on the product. After the upper die moves up the distance of the upper die pressure plate's travel, the pressure plate spring only retains its pre-compression force, which still presses against the transmission rod through the pressure plate, thus preventing the inner ejector block from rebounding. This application, by setting the transmission rod to press against the stripper plate, ensures that when the punch is lifted after die forming, the pressure plate still presses against the inner ejector block through the transmission rod, offsetting the force of the inner ejector block spring and preventing the inner ejector block from exerting a rebounding force on the product. This avoids product defects caused by rebounding in traditional stripping methods. By reducing product defects caused by the stripping process, the produced product quality becomes more stable and reliable, thereby improving the product qualification rate, reducing production costs, increasing production efficiency, and bringing greater economic benefits to the enterprise.

[0038] This application also provides a semi-sliding forming mold including the above-mentioned semi-sliding forming mold ejection mechanism. This forming mold can reduce the problem of the inner top block rebounding after processing, thereby improving the product yield and reducing the production cost of semi-sliding forming products. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the material ejection mechanism of the existing semi-shear forming mold provided in the embodiments of this utility model;

[0040] Figure 2 This is a schematic diagram of the improved half-shear forming mold opening process provided in the embodiments of this utility model;

[0041] Figure 3 This is a schematic diagram of the material ejection mechanism of the existing semi-shear forming mold provided in the embodiments of this utility model;

[0042] Figure 4 This is a schematic diagram of the pressure plate spring resetting when the improved half-shear forming mold is opened, as provided in the embodiments of this utility model.

[0043] Figure 5 This is a schematic diagram showing the installation groove provided in the semi-shear forming mold in an embodiment of this utility model;

[0044] Figure 6 This is a schematic diagram of the pressure plate equal-height sleeve provided in an embodiment of this utility model.

[0045] Figure label:

[0046] 1. Upper mold structure; 11. Upper mold base; 111. Pressure plate spring; 112. Pressure plate equal height sleeve; 1121. Cylinder shell; 1122. Guide rod; 12. Upper mold base; 13. Upper mold pressure plate; 2. Lower mold structure; 21. Lower mold base; 22. Forming die; 221. Mounting groove; 2211. First groove; 2212. Second groove; 3. Inner ejector block; 31. Detection groove; 4. Elastic element; 5. Force transmission rod. Detailed Implementation

[0047] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0048] Semi-shear forming of sheet metal parts is a common forming process. Also known as semi-punching or semi-shear forming, it works by using a punch to cut into the material to a certain depth, typically between 30% and 70% of the material thickness. This partially cuts or compresses the sheet metal, creating localized protrusions or depressions while maintaining the overall continuity of the material. In traditional semi-shear forming, the ejection method involves designing an inner ejector block within the die cavity. Specifically, during die opening, the inner ejector block is flush with the lower die surface; during punching, the punch presses down on the inner ejector block as it moves downwards, compressing the spring at the bottom of the inner ejector block.

[0049] However, this material removal method has a significant drawback: when the punch is lifted after the mold is formed, the pressure plate still holds the product down, while the inner ejector block has already pushed the material upwards under the spring force, causing the semi-shear forming feature to be reversed. This reverse force can easily cause deformation or defects in the parts, especially for thin-film products, where the defects are more pronounced due to the weaker material rigidity.

[0050] Based on this, this application provides a material ejection mechanism for a semi-shear forming mold.

[0051] Example 1

[0052] like Figures 1-6 As shown, this embodiment provides a material ejection mechanism for a semi-shear forming mold, comprising:

[0053] An inner ejector block 3 is movably disposed in the forming cavity 22, and the moving direction of the inner ejector block 3 is arranged along the opening and closing direction of the mold; a force transmission rod 5 is provided on the inner ejector block 3, and one end of the force transmission rod 5 passes through the top of the forming cavity 22.

[0054] An elastic element 4 is also provided between the bottom of the inner top block 3 and the forming die 22.

[0055] In traditional semi-shear forming dies, when the punch is lifted after die forming, the pressure plate still holds the product down, while the ejector pin has already pushed the material upwards under the spring force. This can easily cause the semi-shear forming feature to be pushed upwards, resulting in part defects, especially for thin-walled products where the parts are not very rigid. However, the ejector mechanism in this embodiment incorporates a "T"-shaped inner ejector block 3 in the punching die and a force transmission rod 5 that rests on the ejector plate. When the punch is lifted after die forming, the pressure plate still holds the inner ejector block 3 through the force transmission rod 5, counteracting the spring force of the inner ejector block 3 and preventing it from exerting a reverse pushing force on the product. This avoids the product defects caused by reverse pushing in traditional ejector methods.

[0056] By reducing product defects caused by the material return process, the quality of the produced products is more stable and reliable, thereby improving the product qualification rate, reducing production costs, increasing production efficiency, and bringing greater economic benefits to the enterprise. Furthermore, this semi-shear forming mold material return mechanism is applicable to all semi-shear forming production processes, has wide applicability, and can meet the semi-shear forming processing needs of sheet metal parts of different sizes, shapes, and materials, exhibiting high versatility and practicality.

[0057] Example 2

[0058] This embodiment is an improvement on embodiment 1.

[0059] like Figures 1-6 As shown, in this embodiment, 2 to 6 force transmission rods 5 are provided on the top block, and each force transmission rod 5 is evenly distributed on the inner top block 3 along the circumference of the inner top block 3.

[0060] By setting 2 to 6 force transmission rods 5 on the inner top block 3 and distributing them evenly around the circumference of the inner top block 3, the force exerted by the upper die pressure plate 13 can be evenly transmitted to the inner top block 3. This uniform force transmission method avoids the problem of deformation of the inner top block 3 or uneven product ejection caused by uneven local force, and improves the stability and reliability of the ejection process.

[0061] Specifically, the number of force transmission rods 5 can be adjusted according to the size of the mold and the complexity of the product, enabling the unloading mechanism to adapt to semi-shear forming molds of different sizes and shapes. This flexibility makes mold design more flexible and can meet the needs of more production scenarios.

[0062] Furthermore, in this embodiment, two to four elastic elements 4 are provided between the inner top block 3 and the forming die 22.

[0063] By setting two to four elastic elements 4 between the inner ejector block 3 and the forming die 22, and distributing them evenly along the circumference of the inner ejector block 3, the inner ejector block 3 is subjected to uniform force during the ejection process. This uniform force distribution avoids the problems of unstable movement of the inner ejector block 3 or uneven product ejection caused by uneven local force distribution, thus improving the stability and reliability of the ejection process. Furthermore, the number of elastic elements 4 can be adjusted according to the size of the die and the complexity of the product, allowing the ejection mechanism to adapt to semi-shear forming dies of different sizes and shapes. This flexibility makes the die design more flexible and can meet the needs of more production scenarios.

[0064] Example 3

[0065] This embodiment is an improvement on embodiment 1.

[0066] like Figures 1-6 As shown, in this embodiment, the molding die 22 is provided with an installation groove 221. The installation groove 221 includes a first groove 2211 and a second groove 2212 that are interconnected. The first groove 2211 is disposed on one side of the second groove 2212 and the first groove 2211 penetrates the top of the molding die 22. In the longitudinal section direction of the molding die 22, the width of the first groove 2211 is smaller than the width of the second groove 2212.

[0067] The inner top block 3 is disposed in the mounting groove 221 and is adapted to the mounting groove 221.

[0068] The difference in width between the first groove 2211 and the second groove 2212 allows the inner ejector block 3 to be positioned more precisely in the forming die 22. The upper part of the inner ejector block 3 is narrower, allowing it to be smoothly inserted into the first groove 2211; the lower part is wider, allowing it to be stably placed in the second groove 2212, ensuring that the inner ejector block 3 moves smoothly in a predetermined direction during the mold opening and closing process.

[0069] The matching design between the inner top block 3 and the mounting groove 221 ensures that the inner top block 3 is subjected to uniform force during the material ejection process, avoiding problems such as unstable movement of the inner top block 3 or uneven material ejection caused by uneven local force.

[0070] More specifically, the first groove 2211 and the second groove 2212 are connected to form a T-shaped groove structure. This structure can also limit the excessive movement of the inner ejector block 3, thereby preventing damage to the product during the mold opening process. Correspondingly, the inner ejector block 3 is also designed as a T-shape.

[0071] In this embodiment, a force rod receiving groove is provided on the forming die 22, the force rod receiving groove is located above the inner top block 3, and the force transmission rod 5 is located in the force rod receiving groove;

[0072] Along the axial direction of the force rod receiving groove, the width of the bottom of the force rod receiving groove is greater than the width of the top of the force rod receiving groove; the force transmission rod 5 is adapted to the structure of the force rod receiving groove.

[0073] In this embodiment, a connecting post is provided on the inner top block 3, and the force transmission rod 5 is detachably connected to the connecting post. The force transmission rod 5 and the connecting post are connected in a detachable manner, such as by threaded connection, pin connection, or snap-fit ​​connection. This detachable connection method facilitates the installation and replacement of the force transmission rod 5, and also facilitates the maintenance and repair of the mold.

[0074] The connecting post on the inner top block 3 and the force transmission rod 5 are detachably connected, facilitating the installation and replacement of the force transmission rod 5. This design makes mold maintenance more convenient and quick, reducing downtime caused by damage to the force transmission rod 5. The bottom width of the force rod receiving groove is wider than the top width, which facilitates the insertion and positioning of the force transmission rod 5, and at the same time, it can better disperse stress during force transmission, avoiding damage to the force transmission rod 5 due to stress concentration.

[0075] Example 4

[0076] like Figures 1-6 As shown, this embodiment provides a half-shear forming mold, including the half-shear forming mold ejection mechanism described above.

[0077] In this embodiment, an upper mold structure 1 and a lower mold structure 2 are included. The upper mold structure 1 includes an upper mold base 1211, an upper clamping plate, and an upper mold pressure plate 13. The upper clamping plate is disposed at the bottom of the upper mold base 1211, and the upper mold pressure plate 13 is disposed at the bottom of the upper clamping plate. A pressure plate spring 111 is disposed in the upper mold base 1211. One end of the pressure plate spring 111 is fixed to the upper mold base 1211, and the other end passes through the upper clamping plate and abuts against the upper mold pressure plate 13. A half-shear forming punch is also disposed in the upper mold pressure plate 13.

[0078] The lower mold structure 2 includes a lower mold base 21 and a forming die 22. The forming die 22 is fixed on the lower mold base 21. The inner top block 3 is disposed in the forming die 22. One end of the force transmission rod 5 passes through the forming die 22 and abuts against the upper mold pressure plate 13.

[0079] Specifically, the upper die pressure plate 13 is used to press the sheet metal during the forming process, preventing it from moving during punching. A pressure plate spring 111 is installed in the upper die base 1211, with one end fixed to the upper die base 1211 and the other end passing through the upper clamping plate and abutting against the upper die pressure plate 13. The pressure plate spring 111 is compressed when the die is closed and releases energy when the die is opened, pushing the upper die pressure plate 13 downwards. A semi-shear forming punch is used to perform semi-shear forming operations on the sheet metal. The lower die base 21 serves as the bottom frame of the die, providing a base for mounting and supporting other components. The forming die 22 is fixed to the lower die base 21 and is used to accommodate the sheet metal and perform the semi-shear forming operation.

[0080] In this embodiment, a pressure plate equalization sleeve 112 is provided on the upper mold base 1211. One end of the pressure plate equalization sleeve 112 is fixed on the upper mold base 1211, and the other end passes through the upper clamping plate and is movably connected to the upper mold pressure plate 13, so that the upper mold pressure plate 13 can move up and down along the axial direction of the pressure plate equalization sleeve 112.

[0081] The equal-height sleeve 112 of the pressure plate is an important component of the material ejection mechanism of the semi-shear forming mold. Its working principle is as follows: The equal-height sleeve 112 of the pressure plate is set between the upper mold pressure plate 13 and the upper mold base 1211, and is usually symmetrically distributed to ensure uniform force.

[0082] One end of the pressure plate equal height sleeve 112 is fixed to the upper mold base 1211, and the other end is movably connected to the upper mold pressure plate 13, so that the upper mold pressure plate 13 can move up and down along the sleeve axis.

[0083] When the mold closes, the upper die pressure plate 13 moves downward under pressure, and the pressure plate spring 111 is compressed. At this time, the equal-height sleeve does not restrict the downward movement of the pressure plate, allowing it to be pressed down synchronously with the upper die base 1211 to the designated position, ensuring that the semi-shear forming punch completes the punching of the sheet. After the punch is lifted, the pressure plate spring 111 begins to reset, and the upper die pressure plate 13 moves upward under the action of the spring force. When the pressure plate moves to be flush with the top of the equal-height sleeve, the sleeve will prevent the pressure plate from continuing to move upward, thereby limiting its stroke.

[0084] The equal-height sleeve limits the stroke of the pressure plate, ensuring that the pressure of the pressure plate on the force transmission rod 5 is released in a set sequence during mold opening. When the pressure plate spring 111 is not fully reset, the pressure plate, through the force transmission rod 5, presses against the T-shaped inner ejector block 3, counteracting the upward force of the spring on the inner ejector block 3 and preventing the half-shear forming feature from being pushed back. As the upper mold continues to move upward, after the pressure plate reaches the limit position of the equal-height sleeve, the pressure plate separates from the product and no longer applies pressure. At this time, the T-shaped inner ejector block 3 is smoothly ejected under the spring force, avoiding product defects. More preferably, multiple equal-height sleeves 112 are provided. The synchronous limiting effect of multiple equal-height sleeves ensures that the upper mold pressure plate 13 remains horizontal during movement, avoiding tilting due to uneven force, thereby ensuring uniform pressure of the force transmission rod 5 on the T-shaped inner ejector block 3 and improving ejection stability.

[0085] More specifically, in this embodiment, the pressure plate equal height sleeve 112 includes a cylindrical shell 1121 and a guide rod 1122. The cylindrical shell 1121 is fixed on the upper mold base 1211, and the guide rod 1122 is disposed in the cylindrical shell 1121. One end of the guide rod 1122 passes through the cylindrical shell 1121 and extends into the upper mold pressure plate 13.

[0086] The upper die pressing plate 13 is provided with a guide hole, the inner diameter of which is adapted to the guide rod 1122, and the inner diameter of the guide rod 1122 is smaller than the outer diameter of the cylindrical shell 1121.

[0087] The design of the sleeve shell 1121 with a fixed length ensures that the upper mold pressure plate 13 can only move upward to the bottom of the sleeve when the mold is opened, avoiding excessive movement that could lead to loss of control over the ejection timing. The cylindrical structure and the sleeve hole provide guidance for the pressure plate, preventing it from shifting during movement and ensuring that the pressure of the force transmission rod 5 on the inner top block 3 is uniform.

[0088] The working process of this mold is as follows:

[0089] When the mold is in the closed state, the half-shearing and punching has been completed.

[0090] The pressure plate spring 111 is compressed under force, and the semi-shear forming punch abuts against the T-shaped inner top block 3, causing the pressure plate spring 111 to be compressed under force. The upper die pressure plate 13 presses the T-shaped inner top block 3 evenly through the force transmission rod 5. The force transmission rod 5 is connected to the inner top block 3 through the connecting column, which counteracts the force exerted by the pressure plate spring 111 on the T-shaped inner top block 3 on the semi-shear forming feature and prevents back-flipping.

[0091] During the mold opening process, the upper mold begins to move upwards, and the semi-shear forming punch, fixed on the upper clamping plate, moves upwards together with the upper mold. As the upper mold moves upwards, the pressure plate spring 111 gradually returns to its original position, but the pressure plate still evenly presses against the T-shaped inner ejector block 3 through the force transmission rod 5, continuing to counteract the force of the inner ejector block 3 spring and preventing the inner ejector block 3 from exerting a counter-pressure force on the product. When the upper mold has moved upwards by the distance of the upper mold pressure plate 13's stroke, the pressure plate spring 111 only retains its pre-compression force, still pressing against the force transmission rod 5 through the pressure plate, thus resisting the T-shaped inner ejector block 3. Subsequently, the upper mold continues to move upwards, and the upper mold pressure plate 13 moves upwards together under the action of the pressure plate equal-height sleeve 112, and the pressure plate no longer exerts any force on the product part. At this time, the T-shaped inner ejector block 3 moves upwards under the action of the inner ejector block 3 spring, ejecting the product.

[0092] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0093] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0094] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A material ejection mechanism for a semi-shear forming mold, characterized in that, include: An inner ejector block is movably disposed in the forming cavity, and the direction of movement of the inner ejector block is set along the opening and closing direction of the mold; a force transmission rod is provided on the inner ejector block, and one end of the force transmission rod passes through the top of the forming cavity; An elastic element is also provided between the bottom of the inner top block and the forming die.

2. The material ejection mechanism for the semi-shear forming mold according to claim 1, characterized in that: Two to six force transmission rods are provided on the top block, and each force transmission rod is evenly distributed on the inner top block along the circumference of the inner top block.

3. The material ejection mechanism for the semi-shear forming mold according to claim 1, characterized in that: Two to four elastic elements are provided between the inner top block and the forming die.

4. The material ejection mechanism for the semi-shear forming mold according to claim 1, characterized in that: The forming die is provided with an installation groove, which includes a first groove and a second groove that are connected to each other. The first groove is disposed on one side of the second groove and extends through the top of the forming die. In the longitudinal section direction of the forming die, the width of the first groove is smaller than the width of the second groove. The inner top block is disposed in the mounting groove and is adapted to the mounting groove.

5. The material ejection mechanism for a semi-shear forming die according to any one of claims 1-4, characterized in that: The forming die is provided with a force rod receiving groove, the force rod receiving groove is located above the inner top block, and the force transmission rod is located in the force rod receiving groove; Along the axial direction of the force rod receiving groove, the width of the bottom of the force rod receiving groove is greater than the width of the top of the force rod receiving groove; the force transmission rod is adapted to the structure of the force rod receiving groove.

6. The material ejection mechanism for a semi-shear forming die according to any one of claims 1-4, characterized in that: A connecting post is provided on the inner top block, and the force transmission rod is detachably connected to the connecting post.

7. A semi-stamping forming die characterized by: Includes the material ejection mechanism for the semi-shear forming mold as described in any one of claims 1-6.

8. The semi-shear forming mold according to claim 7, characterized in that: The device includes an upper die structure and a lower die structure. The upper die structure includes an upper die base, an upper clamping plate, and an upper die pressure plate. The upper clamping plate is located at the bottom of the upper die base, and the upper die pressure plate is located at the bottom of the upper clamping plate. A pressure plate spring is provided in the upper die base, with one end of the pressure plate spring fixed to the upper die base and the other end passing through the upper clamping plate and abutting against the upper die pressure plate. A semi-shear forming punch is also provided in the upper die pressure plate. The lower mold structure includes a lower mold base and a forming die. The forming die is fixed on the lower mold base, the inner top block is disposed in the forming die, and one end of the force transmission rod passes through the forming die and abuts against the upper mold pressure plate.

9. The semi-shear forming mold according to claim 8, characterized in that: The upper mold base is provided with a pressure plate equalization sleeve. One end of the pressure plate equalization sleeve is fixed on the upper mold base, and the other end passes through the upper clamping plate and is movably connected to the upper mold pressure plate, so that the upper mold pressure plate can move up and down along the axial direction of the pressure plate equalization sleeve.

10. The semi-shear forming mold according to claim 9, characterized in that: The pressure plate equal height sleeve includes a cylindrical shell and a guide rod. The cylindrical shell is fixed on the upper mold base, and the guide rod is disposed in the cylindrical shell. One end of the guide rod passes through the cylindrical shell and extends into the upper mold pressure plate. The upper die pressing plate is provided with a guide hole, the inner diameter of which is adapted to the guide rod, and the inner diameter of the guide rod is smaller than the outer diameter of the cylindrical shell.

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