Gear die-casting die with auxiliary demolding structure

Abstract

The utility model relates to the technical field of gear die-casting dies, in particular to a gear die-casting die with an auxiliary demolding structure, which comprises a bottom plate, an anti-slip pad is fixedly mounted on the bottom surface of the bottom plate, a supporting plate is fixedly mounted on the surface of the bottom plate, a round rod is fixedly mounted on the surface of the supporting plate, and a top plate is fixedly mounted at the top end of the round rod. And a die-casting air cylinder is fixedly mounted on the surface of the top plate. According to the utility model, through the cooperation of the ejector cylinder, the push plate and the ejector rod, after the ejector cylinder is started, the push plate pushes the ejector rod, the ejector rod penetrates through the through hole of the lower die and ejects a cooled casting, and in order to ensure the accuracy of the movement of the ejector rod, the limiting block is embedded into the limiting groove, so that the movement range of the ejector rod is strictly limited, and the damage of the die or the casting caused by excessive movement is prevented; meanwhile, the air hole structure helps to release air pressure in the mold cavity in the ejection process of the casting, air resistance is reduced, smooth demolding is ensured, and the mold sticking phenomenon caused by air blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gear die-casting molds, in particular to a gear die-casting mold with an auxiliary demoulding structure. Background Technique

[0002] A gear is a mechanical component with teeth on the rim that continuously mesh to transmit motion and power. With the development of production, the smooth operation of gears has received attention. Gears can be processed by casting, where molten metal is poured into a casting mold to form a predetermined shape. During the gear die-casting production process, the demoulding operation of the mold is one of the key links affecting product quality and production efficiency. Traditional gear die-casting molds often rely on a simple mechanical ejection structure during demoulding. Although they can complete the basic demoulding operation, due to design limitations, problems such as uneven stress, surface damage, and even deformation often occur during the ejection of castings. In addition, situations such as blocked air holes or failure to timely exhaust the air in the mold cavity easily lead to adhesion between the casting and the mold surface, affecting the smoothness of demoulding, and thus reducing the product yield and surface quality. With the development of industrial technology, the requirements for the precision and surface of gear castings are getting higher and higher, and the existing mold designs cannot fully meet the production requirements of high quality and high efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems proposed in the above background technique.

[0004] The utility model adopts the following technical scheme: A gear die-casting mold with an auxiliary demoulding structure, including a bottom plate, a non-slip pad is fixedly installed on the bottom surface of the bottom plate, a support plate is fixedly installed on the surface of the bottom plate, a round rod is fixedly installed on the surface of the support plate, a top plate is fixedly installed at the top end of the round rod, a die-casting cylinder is fixedly installed on the surface of the top plate, a lifting plate is fixedly installed at the output end of the die-casting cylinder, a frame is fixedly installed on the bottom surface of the lifting plate, an upper mold is fixedly installed inside the frame, a lower mold is fixedly installed on the surface of the support plate, a bracket is fixedly installed on the bottom surface of the support plate, a top material cylinder is fixedly installed on the surface of the bracket, a push plate is fixedly installed at the output end of the top material cylinder, a top rod is fixedly installed on the surface of the push plate, a limit block is fixedly installed at the top end of the top rod, a limit groove is opened inside the lower mold, and a through hole is opened inside the limit groove.

[0005] Preferably, a fixed seat is fixedly installed on the side of the lower mold. A groove is formed on the surface of the fixed seat. A slider is slidably connected inside the groove. A soft pad is fixedly installed on the surface of the slider. A spring is fixedly connected between the slider and the inside of the groove. Here, the mold has better self - adaptability during the die - casting process, can effectively absorb the vibration and pressure changes inside the mold, avoids excessive mechanical stress on the gear casting during demolding, thereby reducing the risk of product damage and improving the surface quality of the casting.

[0006] Preferably, the number of the fixed seats is two groups, and the two groups of fixed seats are symmetrically distributed on both sides of the lower mold. Here, it can provide balanced support and stability during demolding, ensure the smooth progress of the demolding process, avoid possible offset or tilt problems during demolding, and further improve the efficiency and precision of the mold operation.

[0007] Preferably, the ejector rod is slidably connected inside the through - hole. The limiting block is located inside the limiting groove, and the diameter of the limiting block is the same as the diameter of the limiting groove. Here, the ejector rod can accurately control the upper and lower movement limits during demolding, ensure the smoothness and stability during the demolding process, and prevent damage to the mold or product caused by excessive movement of the ejector rod.

[0008] Preferably, air holes are formed inside the limiting groove, and the air holes surround the through - hole. Here, it can effectively reduce the air resistance during demolding and provide an additional exhaust function, which helps to ensure a smoother demolding process, thereby reducing product deformation and defects and improving the yield.

[0009] Preferably, insertion holes are formed on the side of the frame body. Screws are inserted inside the insertion holes. An installation block is fixedly installed on the surface of the upper mold. A threaded hole is formed on the side of the installation block. The screws are threadedly connected inside the threaded hole. Here, the installation and disassembly of the mold are made more convenient and firm. The threaded connection between the installation block and the threaded hole ensures the stability of the mold structure, reduces the possibility of mold displacement during die - casting, and improves the service life and reliability of the mold.

[0010] Preferably, a positioning block is fixedly installed on the side of the installation block. A positioning groove is formed inside the frame body. The positioning block is inserted inside the positioning groove. Here, it further enhances the fitting accuracy of each component of the mold. During the die - casting process, the positioning block can effectively prevent the misalignment of the mold components, ensure the accuracy and consistency of the product, reduce the friction and wear between the mold components, and extend the service life of the mold.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] 1. In the present utility model, by providing a knockout cylinder, a push plate and a knockout rod structure, when the knockout cylinder is activated, the push plate is pushed by its output end, and the push plate drives the knockout rod fixed thereon. The knockout rod passes through the perforation of the lower die and ejects the cooled and formed casting from the die cavity. To ensure the precise and reliable movement of the knockout rod, the limit block is embedded in the limit groove, strictly restricting the movement range of the knockout rod and preventing damage to the die or casting that may be caused by excessive movement of the knockout rod. By providing an air hole structure, during the process of the casting being ejected by the knockout rod, the air holes help to release the residual air pressure in the die cavity, reduce air resistance, ensure smoother demoulding, and avoid the phenomenon of the casting sticking to the die due to air blockage.

[0013] 2. In the present utility model, by adopting the threaded connection method of screws and screw holes, the installation and disassembly of the die are ensured to be simple, firm, the structural stability of the die during operation is improved, effectively preventing the displacement problem of the die caused by vibration or other factors during die casting, further ensuring the accuracy and consistency of the product. The matching structure of the positioning block and the positioning groove enhances the alignment accuracy of the various components of the die, avoiding misalignment during die operation, not only ensuring high precision during casting forming, but also reducing the friction and wear between the various components of the die, and prolonging the service life of the die. Description of the Drawings

[0014] Figure 1 Schematic diagram of a gear die casting die with an auxiliary demoulding structure proposed by the present utility model;

[0015] Figure 2 Bottom view of a gear die casting die with an auxiliary demoulding structure proposed by the present utility model;

[0016] Figure 3 Assembly schematic diagram of the upper die of a gear die casting die with an auxiliary demoulding structure proposed by the present utility model;

[0017] Figure 4 Cross-sectional view of the lower die of a gear die casting die with an auxiliary demoulding structure proposed by the present utility model;

[0018] Figure 5 For a gear die casting die with an auxiliary demoulding structure proposed by the present utility model Figure 4 Enlarged view of part A.

[0019] Legend Explanation:

[0020] 1. Bottom plate; 2. Support plate; 3. Round rod; 4. Top plate; 5. Die-casting cylinder; 6. Lifting plate; 7. Frame; 8. Upper die; 9. Lower die; 10. Fixed seat; 11. Groove; 12. Slide block; 13. Soft pad; 14. Spring; 15. Bracket; 16. Stripping cylinder; 17. Pushing plate; 18. Ejector rod; 19. Limit block; 20. Limit groove; 21. Perforation; 22. Air hole; 23. Mounting block; 24. Positioning block; 25. Positioning groove; 26. Screw hole; 27. Jack; 28. Screw; 29. Anti-slip pad. Detailed implementation manner

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification. Embodiment 1

[0023] Please refer to Figures 1-5, the present utility model provides a technical solution: a gear die-casting mold with an auxiliary demolding structure, including a bottom plate 1. A non-slip pad 29 is fixedly installed on the bottom surface of the bottom plate 1. A support plate 2 is fixedly installed on the surface of the bottom plate 1. A round rod 3 is fixedly installed on the surface of the support plate 2. The top end of the round rod 3 is fixedly installed with a top plate 4. A die-casting cylinder 5 is fixedly installed on the surface of the top plate 4. The output end of the die-casting cylinder 5 is fixedly installed with a lifting plate 6. A frame body 7 is fixedly installed on the bottom surface of the lifting plate 6. An upper mold 8 is fixedly installed inside the frame body 7. A lower mold 9 is fixedly installed on the surface of the support plate 2. A fixed seat 10 is fixedly installed on the side surface of the lower mold 9. A groove 11 is opened on the surface of the fixed seat 10. A slider 12 is slidably connected inside the groove 11. A soft pad 13 is fixedly installed on the surface of the slider 12. A spring 14 is fixedly connected between the slider 12 and the inside of the groove 11, enabling the mold to have better adaptability during die-casting, effectively absorbing the vibration and pressure changes inside the mold, avoiding excessive mechanical stress on the gear casting during demolding, thereby reducing the risk of product damage and improving the surface quality of the casting. The number of fixed seats 10 is two groups, and the two groups of fixed seats 10 are symmetrically distributed on both sides of the lower mold 9, capable of providing balanced support and stability during demolding, ensuring a smooth demolding process, avoiding possible offset or tilt problems during demolding, and further improving the working efficiency and precision of the mold. A support 15 is fixedly installed on the bottom surface of the support plate 2. A ejector cylinder 16 is fixedly installed on the surface of the support 15. The output end of the ejector cylinder 16 is fixedly installed with a push plate 17. A ejector rod 18 is fixedly installed on the surface of the push plate 17. The top end of the ejector rod 18 is fixedly installed with a limit block 19. A limit groove 20 is opened inside the lower mold 9. A through hole 21 is opened inside the limit groove 20. The ejector rod 18 is slidably connected inside the through hole 21. The limit block 19 is located inside the limit groove 20, and the diameter of the limit block 19 is the same as the diameter of the limit groove 20, enabling precise control of the up and down movement limit of the ejector rod 18 during demolding, ensuring a smooth and stable demolding process, preventing damage to the mold or product caused by excessive movement of the ejector rod 18. Air holes 22 are opened inside the limit groove 20, and the air holes 22 surround the through hole 21, capable of effectively reducing the air resistance during demolding and providing an additional exhaust function, helping to ensure a smoother demolding process, thereby reducing product deformation and defects and improving the finished product rate. Example 2

[0024] Please refer to Figure 3, a jack 27 is provided on the side of the frame body 7, a screw 28 is inserted inside the jack 27, an installation block 23 is fixedly installed on the surface of the upper die 8, a threaded hole 26 is provided on the side of the installation block 23, and the screw 28 is threadedly connected inside the threaded hole 26, making the installation and disassembly of the mold more convenient and firm. The threaded connection between the installation block 23 and the threaded hole 26 ensures the stability of the mold structure, reduces the possibility of mold displacement during die casting, improves the service life and reliability of the mold. A positioning block 24 is fixedly installed on the side of the installation block 23, a positioning groove 25 is provided inside the frame body 7, and the positioning block 24 is inserted inside the positioning groove 25, further enhancing the fitting accuracy of each component of the mold. During die casting, the function of the positioning block 24 can effectively prevent the misalignment of mold components, ensure the accuracy and consistency of products, reduce the friction and wear between mold components, and extend the service life of the mold.

[0025] Working principle: Before die casting, the bottom plate 1 is fixed on the workbench surface through the anti-slip pad 29 to ensure that the entire mold system does not displace during operation. The die casting machine starts to work. The die casting cylinder 5 is connected to the lifting plate 6 and is ready to drive the upper mold 8 for die casting. When the die casting cylinder 5 is started, it drives the lifting plate 6 to move downward, driving the frame 7 and the upper mold 8 mounted on the lifting plate 6 to descend together. The upper mold 8 closely combines with the lower mold 9 to form a complete mold cavity. During this closing process, the precise cooperation between the limit block 19 and the limit groove 20 ensures the alignment and firm connection of the upper mold 8 and the lower mold 9, avoiding the risk of mold misalignment. The shape and size of the mold cavity are strictly controlled, ensuring the high precision of the final formed product. After the mold cavity is completely closed, the die casting machine injects molten metal into the interior of the mold cavity under high pressure. The metal fills the mold cavity and quickly cools and solidifies therein to form the required gear casting. Through the pressure provided by the die casting cylinder 5, the metal material can be evenly distributed in the mold cavity, thus avoiding bubbles, voids or uneven material distribution. After the molten metal solidifies in the mold cavity to form the gear casting, the die casting cylinder 5 moves in the reverse direction, and the lifting plate 6 rises, thus driving the separation of the upper mold 8 and the lower mold 9. At this time, the upper mold 8 gradually lifts, and the casting still stays in the lower mold 9. Through precise cylinder control, the separation of the upper mold 8 and the lower mold 9 can be carried out smoothly, preventing the displacement or damage of the casting during this process. As the upper mold 8 is lifted, the demolding operation starts immediately. The ejector cylinder 16 is started, and it pushes the push plate 17 through its output end. The push plate 17 drives the ejector rod 18 fixed on it. The ejector rod 18 passes through the through hole 21 of the lower mold 9 and ejects the cooled and formed casting from the mold cavity. In order to ensure the precise and reliable movement of the ejector rod 18, the limit block 19 is embedded in the limit groove 20, strictly restricting the movement range of the ejector rod 18 and preventing the damage to the mold or casting that may be caused by the excessive movement of the ejector rod 18. It also avoids the damage to the casting caused by friction or stretching during forced demolding. Fixed seats 10 are symmetrically installed on both sides of the lower mold 9. The sliders 12 inside the fixed seats 10 cooperate with the mold through springs 14, enabling the mold to have self-adaptability during demolding, effectively absorbing the vibration and pressure changes generated during demolding, reducing the mechanical stress on the casting during the demolding process, and avoiding the surface damage or deformation of the casting caused by the sudden release or uneven distribution of force. At the same time, the soft pads 13 on the surfaces of the sliders 12 play a buffering role, further reducing the risk of damage to the casting. In order to ensure the smooth progress of the demolding process, air holes 22 are also designed inside the limit groove 20. The air holes 22 surround the through hole 21 to form an effective exhaust system. During the process of the casting being ejected by the ejector rod 18, the air holes 22 help to release the residual air pressure in the mold cavity, reduce the air resistance, ensure smoother demolding, and avoid the sticking mold phenomenon caused by air blockage to the casting. In addition, the exhaust function of the air holes 22 can also effectively reduce the deformation or surface defects of the casting, thereby improving the qualified rate of the finished product. The mounting block 23 of the upper mold 8 and the frame 7 are threadedly connected through screws 28 and screw holes 26.It ensures the firmness of the mold during installation, and at the same time facilitates quick disassembly, improving the convenience of using the mold. The mold can maintain good stability during actual production, avoiding the problem of product deviation caused by mold displacement during die-casting. In addition, the matching design of the positioning block 24 and the positioning groove 25 further enhances the alignment accuracy of each part of the mold, ensuring the precise operation of the mold after each installation.

[0026] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A gear die-casting mold with an auxiliary demolding structure, including a bottom plate (1), characterized in that: A non-slip pad (29) is fixedly installed on the bottom surface of the bottom plate (1). A support plate (2) is fixedly installed on the surface of the bottom plate (1). A round rod (3) is fixedly installed on the surface of the support plate (2). A top plate (4) is fixedly installed at the top end of the round rod (3). A die-casting cylinder (5) is fixedly installed on the surface of the top plate (4). A lifting plate (6) is fixedly installed at the output end of the die-casting cylinder (5). A frame body (7) is fixedly installed on the bottom surface of the lifting plate (6). An upper die (8) is fixedly installed inside the frame body (7). A lower die (9) is fixedly installed on the surface of the support plate (2). A bracket (15) is fixedly installed on the bottom surface of the support plate (2). A blanking cylinder (16) is fixedly installed on the surface of the bracket (15). A push plate (17) is fixedly installed at the output end of the blanking cylinder (16). A ejector rod (18) is fixedly installed on the surface of the push plate (17). A limit block (19) is fixedly installed at the top end of the ejector rod (18). A limit groove (20) is formed inside the lower die (9). A through hole (21) is formed inside the limit groove (20).

2. The gear die-casting mold with an auxiliary demolding structure according to claim 1, wherein: A fixed seat (10) is fixedly installed on the side surface of the lower die (9). A groove (11) is formed on the surface of the fixed seat (10). A slider (12) is slidably connected inside the groove (11). A soft pad (13) is fixedly installed on the surface of the slider (12). A spring (14) is fixedly connected between the slider (12) and the inside of the groove (11).

3. The gear die-casting mold with an auxiliary demolding structure according to claim 2, wherein: The number of the fixed seats (10) is two groups, and the two groups of fixed seats (10) are symmetrically distributed on both sides of the lower die (9).

4. The gear die-casting mold with an auxiliary demolding structure according to claim 1, wherein: The ejector rod (18) is slidably connected inside the through hole (21). The limit block (19) is located inside the limit groove (20), and the diameter of the limit block (19) is the same as that of the limit groove (20).

5. The gear die-casting mold with an auxiliary demolding structure according to claim 1, characterized in that: An air hole (22) is formed inside the limit groove (20), and the air hole (22) surrounds the through hole (21).

6. The gear die-casting mold with an auxiliary demolding structure according to claim 1, characterized in that: A jack (27) is formed on the side surface of the frame body (7). A screw (28) is inserted inside the jack (27). An installation block (23) is fixedly installed on the surface of the upper die (8). A screw hole (26) is formed on the side surface of the installation block (23). The screw (28) is threadedly connected inside the screw hole (26).

7. The gear die-casting mold with an auxiliary demolding structure according to claim 6, wherein: A positioning block (24) is fixedly installed on the side surface of the installation block (23). A positioning groove (25) is formed inside the inner side of the frame body (7). The positioning block (24) is inserted inside the positioning groove (25).

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