High sealing pressure die

Abstract

The utility model relates to die casting die technical field discloses a kind of high sealing die casting die, including workbench, the workbench top is fixedly connected with fixed mould, the workbench top is provided with movable mould;The fixed mould inner cavity is provided with sealing assembly.The utility model passes through floating type conical surface seal and linkage mechanism, solve the sealing problem of runner interface after replacing core, significantly improve the quality and production efficiency of die casting, specifically speaking, during clamping process, the pulley at the end of guide rod extrudes inclined block on sprue sleeve, drives sprue sleeve to overcome spring force to move accurately forward, so that its end portion is tightly embedded with the inner taper mouth of core, and multiple seals are formed using sealing ring, this process realizes the automation and precision of sealing connection, ensures that molten metal is not leaked under very high injection pressure, thereby directly producing high-density, high-sealing die casting with no internal porosity and shrinkage, greatly reducing the scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, and in particular to a high-sealing die casting mold. Background Technology

[0002] Die casting molds are tools used to produce metal castings such as aluminum alloys and magnesium alloys. They are usually made of high-temperature and wear-resistant materials. Their main function is to inject molten metal into the mold cavity in a high-temperature and high-pressure environment, and then solidify it to form a casting of a specified shape. Die casting molds consist of multiple components, including the mold shell, core and cavity, sealing device, cooling system, venting system, pressure control device, and heating device. These components work together to ensure that the mold can withstand high temperature and high pressure during the casting process, ensuring the accuracy and quality of the casting.

[0003] Existing die-casting molds still have some problems during use. For example, different cores are usually installed inside the fixed mold to die-cast workpieces of different shapes. However, since the cores need to be replaced, a sprue bushing is usually used to connect the core and the fixed mold. The sprue bushing is connected to the external die-casting machine. In order to ensure the smooth injection of molten metal and prevent leakage, the sprue bushing and the core must maintain a good seal. However, some molds cannot guarantee the sealing performance between the sprue bushing and the core after the core is replaced, resulting in poor sealing, which in turn affects the casting quality and production efficiency.

[0004] To address these issues, we provide a high-sealing die-casting mold. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of poor sealing between the core and the fixed mold sprue bushing due to the need for frequent core replacement. To address this, we propose a high-sealing die casting mold.

[0006] To achieve the above objectives, this application adopts the following technical solution: a high-sealing die-casting mold, comprising a worktable, a fixed mold fixedly connected to the top of the worktable, and a movable mold disposed on the top of the worktable; a sealing assembly is disposed in the inner cavity of the fixed mold, the sealing assembly comprising a core disposed in the inner cavity of the fixed mold, an inner conical opening opened in the inner cavity of the core, a sealing ring fixedly connected to one side of the inner conical opening, a connection opening opened in the inner cavity of the fixed mold, and a sprue sleeve slidably connected to the inner cavity of the connection opening, the sealing assembly being used to seal the connection between the inner conical opening and the sprue sleeve; a mold closing assembly is disposed on the top of the fixed mold, the mold closing assembly comprising guide sleeves fixedly connected to both sides of the top of the fixed mold, cylinders fixedly connected to the periphery of the top of the worktable, a lifting plate fixedly connected to the free end of the cylinders, the bottom of the lifting plate being fixedly connected to the top of the movable mold, and guide rods fixedly connected to both sides of the bottom of the lifting plate, the surfaces of the guide rods being slidably connected to the inner cavities of the guide sleeves, the mold closing assembly being used to guide the fixed mold and the movable mold to close precisely.

[0007] Preferably, an extrusion port is provided on one side of the fixed mold cavity, the bottom of the extrusion port is connected to the inner cavity of the connecting port, and the top of the extrusion port is connected to the bottom of the guide sleeve.

[0008] Preferably, a wedge block is fixedly connected to the top of the gate sleeve, the surface of the wedge block is slidably connected to the inner cavity of the extrusion port, a spring is fixedly connected to one side of the wedge block, and one end of the spring is fixedly connected to one side of the inner cavity of the extrusion port.

[0009] Preferably, one end of the guide rod is movably connected to a pulley, which is used to compress the inclined block.

[0010] Preferably, the core surface is slidably connected to the inner cavity of the fixed mold, and mounting bolts are threaded around the perimeter of the fixed mold surface, with one end of each mounting bolt extending into the inner cavity of the core.

[0011] Preferably, a solenoid valve is installed on one side of the surface of the sprue sleeve, and an installation head is provided at one end of the sprue sleeve.

[0012] Preferably, the workbench is fixedly connected to support legs on all four sides of its bottom, and the bottom of the support legs is provided with anti-slip texture.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model solves the sealing problem of the runner interface after core replacement by using a floating conical sealing and linkage mechanism, which significantly improves the quality and production efficiency of die castings. Specifically, during the mold closing process, the pulley at the end of the guide rod squeezes the inclined block on the sprue sleeve, driving the sprue sleeve to move forward precisely against the spring force, so that its end is tightly fitted with the inner conical opening of the core, and multiple seals are formed by the sealing ring. This process realizes the automation and precision of the sealing connection, ensuring that there is no leakage of molten metal under extremely high injection pressure, thereby directly producing high-density, high-sealing die castings with no internal porosity and shrinkage, which greatly reduces the scrap rate.

[0015] 2. This utility model achieves modular fixation of the core and fixed mold through mounting bolts, which is simple to disassemble and assemble, and facilitates quick production changeover. The sprue sleeve can automatically reset under the action of the spring, providing ample operating space for core replacement in non-working state and avoiding collisions and wear during assembly and disassembly. At the same time, the cooperation between the guide rod and the guide sleeve ensures precise alignment of the moving mold and the fixed mold when they are closed, further eliminating the risk of seal failure caused by misalignment, ensuring the continuity and stability of production, and is suitable for high-mix production lines that require frequent mold changes. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a three-dimensional view of a high-sealing die-casting mold.

[0018] Figure 2 This is an exploded view of the cylinder and lifting plate in a high-sealing die-casting mold.

[0019] Figure 3 This is an exploded view of the bottom structure of the lifting plate in a high-sealing die-casting mold.

[0020] Figure 4 This is a schematic cross-sectional view of the fixed mold and core in a high-sealing die-casting mold.

[0021] Figure 5 This is an exploded view of the inner conical vent and sprue sleeve in a high-sealing die-casting mold.

[0022] Legend: 1. Workbench; 2. Fixed mold; 3. Moving mold; 4. Core; 5. Inner conical vent; 6. Sealing ring; 7. Connection port; 8. Sprue sleeve; 9. Guide sleeve; 10. Cylinder; 11. Lifting plate; 12. Guide rod; 13. Extrusion port; 14. Inclined block; 15. Spring; 16. Pulley; 17. Mounting bolt; 18. Solenoid valve; 19. Mounting head; 20. Support leg. Detailed Implementation

[0023] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0024] Example 1

[0025] Please see Figures 1-5 This utility model relates to a high-sealing die-casting mold, comprising a worktable 1, a fixed mold 2 fixedly connected to the top of the worktable 1, and a movable mold 3 disposed on the top of the worktable 1; a sealing assembly is disposed in the inner cavity of the fixed mold 2, the sealing assembly comprising a core 4 disposed in the inner cavity of the fixed mold 2, an inner conical opening 5 opened in the inner cavity of the core 4, a sealing ring 6 fixedly connected to one side of the inner conical opening 5, a connection port 7 opened in the inner cavity of the fixed mold 2, and a sprue sleeve 8 slidably connected to the inner cavity of the connection port 7, the sealing assembly being used to seal the inner conical opening 5 and the sprue. The connection point of the sleeve 8; the top of the fixed mold 2 is provided with a mold closing assembly, which includes guide sleeves 9 fixedly connected to both sides of the top of the fixed mold 2, cylinders 10 fixedly connected to the four sides of the top of the worktable 1, lifting plate 11 fixedly connected to the free end of the cylinder 10, the bottom of the lifting plate 11 fixedly connected to the top of the moving mold 3, and guide rods 12 fixedly connected to both sides of the bottom of the lifting plate 11. The surface of the guide rods 12 is slidably connected to the inner cavity of the guide sleeves 9. The mold closing assembly is used to guide the fixed mold 2 and the moving mold 3 to close accurately.

[0026] Specifically: The fixed mold 2 has an installation port in its inner cavity for installing the core 4. The moving mold 3 and the lifting plate 11 are fixed by an external installation structure to facilitate replacement according to the shape of the internal structure of the core 4. The core 4 is used to form workpieces of different shapes. The inner conical opening 5 is connected to the inside of the core 4 to facilitate the subsequent hydraulic injection of metal into the core 4. The sealing ring 6 ensures that the outside is completely sealed when the inner conical opening 5 and the sprue sleeve 8 are connected. The sprue sleeve 8 is an existing structure that can be connected to an external die casting machine to facilitate the hydraulic injection of metal into the core 4. The guide sleeve 9 and the guide rod 12 can determine the position of the moving mold 3 and the fixed mold 2 when they are raised and lowered and closed, improving the sealing between the moving mold 3 and the fixed mold 2. The moving mold 3 can be raised and lowered by the cylinder 10 and the lifting plate 11 to facilitate mold closing.

[0027] Example 2

[0028] Please see Figures 1-5Based on Example 1, an extrusion port 13 is provided on one side of the inner cavity of the fixed mold 2. The bottom of the extrusion port 13 is connected to the inner cavity of the connecting port 7, and the top of the extrusion port 13 is connected to the bottom of the guide sleeve 9. A wedge block 14 is fixedly connected to the top of the sprue sleeve 8. The surface of the wedge block 14 is slidably connected to the inner cavity of the extrusion port 13. A spring 15 is fixedly connected to one side of the wedge block 14. One end of the spring 15 is fixedly connected to one side of the inner cavity of the extrusion port 13. A pulley 16 is movably connected to one end of the guide rod 12. The pulley 16 is used to extrude the wedge block 14. The surface of the core 4 is slidably connected to the inner cavity of the fixed mold 2. Mounting bolts 17 are threaded around the surface of the fixed mold 2. One end of the mounting bolts 17 extends into the inner cavity of the core 4. A solenoid valve 18 is installed on one side of the surface of the sprue sleeve 8. An installation head 19 is provided at one end of the sprue sleeve 8. Support legs 20 are fixedly connected around the bottom of the worktable 1. Anti-slip textures are provided on the bottom of the support legs 20.

[0029] Specifically: the extrusion port 13 is used to connect the guide sleeve 9 and the connection port 7, so that when the guide rod 12 moves downward, it can drive the pulley 16 to extrude the inclined block 14, so that the inclined block 14 drives the sprue sleeve 8 to seal and connect with the inner cone port 5. The function of the spring 15 is to support the movement of the inclined block 14 and drive the inclined block 14 to reset. The setting of the mounting bolt 17 allows the core 4 to be positioned and installed with the fixed mold 2. The mounting head 19 allows the sprue sleeve 8 to be connected with the external die casting machine injection structure. The support leg 20 and the anti-slip texture allow the entire worktable 1 to be installed stably.

[0030] Working principle: At the start of the mold closing process, cylinder 10 drives the lifting plate 11 to descend, causing the moving mold 3 and the guide rod 12 fixed on it to move downwards. The pulley 16 at the end of the guide rod 12 then enters the guide sleeve 9 on the fixed mold 2 and continues to move downwards until it contacts the inclined block 14 at the top of the sprue sleeve 8. As the mold closing continues, the pulley 16 presses against the inclined surface of the inclined block 14, forcing the sprue sleeve 8 to overcome the force of the spring 15 and slide precisely along the connecting port 7 towards the inner conical opening 5. Finally, the end of the sprue sleeve 8 forms a tight conical surface fit with the inner conical opening 5 on the core 4, while simultaneously pressing the sealing ring 6 to achieve multiple high-pressure sealing. At this time, the molten metal can be passed through the external die-casting machine. The injection is carried out through the mounting head 19 into the sprue sleeve 8, and then injected into the mold cavity at high speed and high pressure through this sealed flow channel. After pressure holding and cooling, the cylinder 10 drives the moving mold 3 to rise, the guide rod 12 and pulley 16 retract, and the sprue sleeve 8 automatically resets under the rebound force of the spring 15, separating from the inner cone 5, making room for the disassembly and replacement of the core 4. Throughout the process, the guide rod 12 and the guide sleeve 9 always ensure the alignment accuracy of the mold closing, while the mounting bolt 17 is used to quickly clamp and position the core 4. The solenoid valve 18 can control the opening and closing sequence of the pouring, thus systematically ensuring that even under the condition of frequent core 4 replacement, high sealing performance and leak-free die casting production can still be obtained.

[0031] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A high-tightness die-casting mold comprising a worktable (1), characterized in that; A fixed mold (2) is fixedly connected to the top of the workbench (1), and a moving mold (3) is provided on the top of the workbench (1); The inner cavity of the fixed mold (2) is provided with a sealing assembly, which includes a core (4) disposed in the inner cavity of the fixed mold (2), an inner cone opening (5) opened in the inner cavity of the core (4), a sealing ring (6) fixedly connected to one side of the inner cone opening (5), a connection opening (7) opened in the inner cavity of the fixed mold (2), and a sprue sleeve (8) slidably connected to the inner cavity of the connection opening (7). The sealing assembly is used to seal the connection between the inner cone opening (5) and the sprue sleeve (8). The fixed mold (2) is provided with a mold closing assembly on its top. The mold closing assembly includes guide sleeves (9) fixedly connected to both sides of the top of the fixed mold (2), cylinders (10) fixedly connected to the top periphery of the worktable (1), lifting plates (11) fixedly connected to the free end of the cylinders (10), the bottom of the lifting plates (11) being fixedly connected to the top of the moving mold (3), and guide rods (12) fixedly connected to both sides of the bottom of the lifting plates (11). The surface of the guide rods (12) is slidably connected to the inner cavity of the guide sleeves (9). The mold closing assembly is used to guide the fixed mold (2) and the moving mold (3) to close precisely.

2. A high containment die-casting mould according to claim 1, characterized in that: The mold (2) has an extrusion port (13) on one side of its inner cavity. The bottom of the extrusion port (13) is connected to the inner cavity of the connection port (7), and the top of the extrusion port (13) is connected to the bottom of the guide sleeve (9).

3. A high containment die-casting mould according to claim 1, characterised in that: The top of the sprue sleeve (8) is fixedly connected to a wedge block (14), the surface of the wedge block (14) is slidably connected to the inner cavity of the extrusion port (13), and a spring (15) is fixedly connected to one side of the wedge block (14), with one end of the spring (15) fixedly connected to one side of the inner cavity of the extrusion port (13).

4. A high containment die-casting mould according to claim 1, characterized in that: One end of the guide rod (12) is movably connected to a pulley (16), which is used to squeeze the inclined block (14).

5. A high containment die-casting mould according to claim 1, characterized in that: The surface of the core (4) is slidably connected to the inner cavity of the fixed mold (2), and the fixed mold (2) is threaded with mounting bolts (17) around its surface, with one end of the mounting bolts (17) extending into the inner cavity of the core (4).

6. A high containment die-casting mould according to claim 1, characterized in that: A solenoid valve (18) is installed on one side of the surface of the sprue sleeve (8), and an installation head (19) is provided at one end of the sprue sleeve (8).

7. A high containment die-casting mould according to claim 1, characterized in that: The workbench (1) is fixedly connected to support legs (20) around its bottom, and the bottom of the support legs (20) is provided with anti-slip texture.

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