Low-pressure casting mold insert structure

Abstract

The utility model relates to the field of mechanical manufacturing, and discloses a low-pressure casting mold insert structure which comprises a lower mold shell, the inner wall of the lower mold shell is fixedly connected with a supporting plate, the top of the supporting plate is fixedly connected with an air cylinder, the driving end of the air cylinder is fixedly connected with a pushing block, and the top of the pushing block is fixedly connected with a fixing shaft. Two first rotating plates are rotationally connected to the outer portion of the fixing shaft, a moving plate is rotationally connected to the other side of each first rotating plate, a second rotating plate is rotationally connected to the other side of each moving plate, a third rotating plate is rotationally connected to the rear side of each second rotating plate, and a springback assembly used for preventing the mold from being fixed is fixedly connected to the inner wall of the lower mold shell. According to the rapid disassembling and replacing device, the air cylinder enables the pushing block to move, the two rotating plates of the pushing block to rotate, the moving plate of the pushing block drives the second rotating plate to rotate, the third rotating plate to rotate, the upper die and the lower die are fixed and loosened, and rapid disassembling and replacing of the dies are achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing, and in particular to a low-pressure casting mold insert structure. Background Technology

[0002] Molds are various shapes and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. Low-pressure casting is a special process in mold manufacturing where molten metal is filled into a mold cavity under relatively low pressure to form a casting. Low-pressure casting is used primarily because it effectively improves casting quality, reduces defects such as porosity and shrinkage cavities, and lowers costs. Insert structures are a type of mold structure where certain parts of the mold are designed as individually machined and replaceable inserts. Their functions include facilitating mold processing and maintenance, extending mold lifespan, and allowing for flexible replacement of inserts to achieve different functions according to different needs, making them of great significance in mold manufacturing.

[0003] A low-pressure casting mold insert structure consists of an insert body, a positioning structure, a fixing structure, a cooling channel, and a demolding structure. The insert body is generally made of a high-strength, high-hardness alloy material with good thermal fatigue resistance. It has good toughness and thermal stability and can withstand the high temperature, high pressure, and erosion of molten metal during the low-pressure casting process. The positioning structure consists of positioning pins and positioning keys. The positioning pins are usually cylindrical and are installed in corresponding pin holes on the insert and the mold body to play a precise radial positioning role, ensuring that the insert is accurately positioned in the mold. The diameter is generally between a few millimeters and tens of millimeters, and the length is determined according to the thickness of the insert and the positioning requirements. The positioning key is generally rectangular and is installed in the keyway of the insert and the mold. It is mainly used to restrict the axial movement and circumferential rotation of the insert and ensure that the insert is installed in the correct direction in the mold. Its size is determined according to the size of the insert and the structural design of the mold. The fixing structure consists of bolts and pressure plates. Bolts are the most common fixing method. By machining corresponding bolt holes on the insert and the mold body, bolts are used to fasten the insert to the mold. The bolt specifications are selected based on the size of the insert and the required tightening force. Pressure plates are used to fix larger or specially shaped inserts. Pressure plates are typically long strips or blocks, and are tightened onto the insert using bolts, thus fixing the insert to the mold. The size and shape of the pressure plate are designed according to the specific characteristics of the insert. The cooling channel consists of cooling water pipes, which use circulating cooling water to remove the heat absorbed by the insert during casting, controlling the insert's temperature and preventing overheating, deformation, or damage. The demolding structure consists of push plates, which are large, flat structures that fit against the insert's demolding surface. During ejection, the push plate pushes the entire casting out of the insert cavity. The size and shape of the push plate are designed according to the shape of the insert cavity and the size of the casting.

[0004] In existing technologies, some low-pressure casting mold insert structures are subject to thermal stress during the casting process, which causes the mold to deform and become difficult to fix. This leads to mold instability, which directly results in a serious decrease in the dimensional accuracy of the castings, and defects such as flash and missing material. This greatly increases the scrap rate and production costs. To address these issues, a low-pressure casting mold insert structure is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a low-pressure casting mold insert structure, which aims to improve the problem in the prior art where the mold is deformed due to the influence of heat during the casting process, making it difficult to fix and resulting in the mold not being fixed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A low-pressure casting mold insert structure includes a lower mold shell. A support plate is fixedly connected to the inner wall of the lower mold shell. A cylinder is fixedly connected to the top of the support plate. A push block is fixedly connected to the drive end of the cylinder. A fixed shaft is fixedly connected to the top of the push block. Two rotating plates are rotatably connected to the outside of the fixed shaft. A movable plate is rotatably connected to the other side of the rotating plates. A rotating plate is rotatably connected to the other side of the movable plate. A rotating plate is rotatably connected to the rear side of the rotating plates. A springback assembly for preventing the mold from being fixed is fixedly connected to the inner wall of the lower mold shell.

[0008] As a further description of the above technical solution:

[0009] The rebound assembly includes a base plate, the inner wall of which is fixedly connected to the inner wall of the lower mold shell. Two grooved plates are fixedly connected to the top of the base plate. A horizontal plate is rotatably connected to the top of the grooved plate. A moving block is rotatably connected to the top of the horizontal plate. A second horizontal plate is rotatably connected to the top of the moving block. A second grooved plate is rotatably connected to the top of the second horizontal plate. A force-bearing plate is fixedly connected to the top of the grooved plate.

[0010] As a further description of the above technical solution:

[0011] The top of the lower mold shell is fixedly connected to a telescopic rod, the top of the telescopic rod is fixedly connected to an upper mold shell, and the bottom of the upper mold shell is fixedly connected to an upper mold.

[0012] As a further description of the above technical solution:

[0013] A force-applying column is fixedly connected to the bottom of the upper mold shell, and the outer side of the force-applying column contacts the inner wall of the support plate after the upper mold shell moves downward.

[0014] As a further description of the above technical solution:

[0015] The lower mold is fixedly connected to the top of the lower mold shell, and one side of the rotating plate three contacts the left and right sides of the lower mold when the cylinder moves forward.

[0016] As a further description of the above technical solution:

[0017] The bottom of the push block is slidably connected to a guide plate, and the bottom of the guide plate is fixedly connected to the top of the support plate;

[0018] As a further description of the above technical solution:

[0019] The movable plate is slidably connected to a fixed block, and the bottom of the fixed block is fixedly connected to the top of the support plate.

[0020] As a further description of the above technical solution:

[0021] A spring is fixedly connected to the left side of the movable block, and the outside of the spring is slidably connected to the outside of the fixed rod.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the cylinder drives the push block to move, thereby causing the two rotating plates to rotate, which in turn causes the moving plate to move, thereby causing the second rotating plate to rotate, and the third rotating plate to rotate. This allows for the fixing and loosening of the upper and lower molds, thus enabling the rapid disassembly and replacement of the molds. In addition, it can improve mold maintenance efficiency and reduce equipment downtime; thus, it can flexibly respond to different production needs and improve the adaptability of production.

[0024] 2. In this utility model, the force plate is subjected to force and moves downward, thereby driving the second horizontal plate to rotate, which in turn causes its moving block to move on the fixed rod, causing the first horizontal plate to rotate as well. Under the push of the first and second horizontal plates, the spring is compressed. When the force plate is no longer under force, the spring releases the force, causing the force plate to move upward. This prevents the upper and lower molds from being fixed after casting. In addition, it facilitates the separation and cleaning of the mold, improves production efficiency, reduces the risk of mold damage, and extends the service life of the mold. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a low-pressure casting mold insert structure proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the upper mold structure of a low-pressure casting mold insert structure proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of a low-pressure casting mold insert structure proposed in this utility model, shown on a rotating plate.

[0028] Figure 4 This is a schematic diagram of the load-bearing plate structure of a low-pressure casting mold insert structure proposed in this utility model.

[0029] Legend:

[0030] 1. Lower mold shell; 2. Support plate; 3. Cylinder; 4. Push block; 5. Fixed shaft; 6. Rotating plate one; 7. Moving plate; 8. Rotating plate two; 9. Rotating plate three; 10. Fixed block; 11. Guide plate; 12. Base plate; 13. Groove plate one; 14. Horizontal plate one; 15. Moving block; 16. Fixed rod; 17. Spring; 18. Horizontal plate two; 19. Groove plate two; 20. Force plate; 21. Telescopic rod; 22. Upper mold shell; 23. Upper mold; 24. Lower mold; 25. Force-applying column. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 2 and Figure 3 This utility model provides an embodiment of a low-pressure casting mold insert structure, including a lower mold shell 1. The lower mold shell 1 serves as the basic frame of the entire insert structure, providing a stable mounting base for other components, withstanding the pressure and impact during the casting process, and ensuring the overall stability of the structure. A support plate 2 is fixedly connected to the inner wall of the lower mold shell 1. The support plate 2 supports the cylinder 3, firmly fixing the cylinder 3 inside the lower mold shell 1 to prevent displacement or shaking of the cylinder 3 during operation. By providing stable support for the cylinder 3, it ensures that the driving end of the cylinder 3 can accurately push the push block 4, ensuring the stability and reliability of power transmission. The top of the support plate 2 is fixedly connected to the cylinder 3. The cylinder 3 is the core power component. When the mold needs to be disassembled and replaced, the cylinder 3 is activated, and its driving end performs a telescopic movement, generating power to push the push block 4 to move. The driving end of the cylinder 3 is fixedly connected to the push block 4, which receives the driving force of the cylinder 3 and converts it into its own linear motion. A fixed shaft 5 is fixedly connected to the top of the push block 4.

[0033] The fixed shaft 5 provides a pivot point for the rotating plate 6, allowing it to rotate flexibly around the fixed shaft 5 and converting the linear motion of the push block 4 into the rotational motion of the rotating plate 6. Two rotating plates 6 are rotatably connected to the outside of the fixed shaft 5. These rotating plates 6 rotate under the drive of the fixed shaft 5, and their rotation angle and direction are determined by the movement of the push block 4. A movable plate 7 is rotatably connected to the other side of the rotating plate 6. The movable plate 7 moves linearly under the drive of the rotating plate 6, and its movement distance is controlled by the rotation of the rotating plate 6. A second rotating plate 8 is rotatably connected to the other side of the movable plate 7. The second rotating plate 8 rotates under the push of the movable plate 7, and its rotational motion is further transmitted to a third rotating plate 9. The third rotating plate 9 is rotatably connected to the rear side of the second rotating plate 8. The third rotating plate 9, as one of the end components of the transmission chain, receives the force and rotational motion transmitted by the second rotating plate 8 and applies it to relevant parts of the mold to fix and release the mold. A spring-loaded component is fixedly connected to the inner wall of the lower mold shell 1 to prevent the mold from becoming stuck.

[0034] Reference Figure 2 and Figure 4 The spring-loaded assembly includes a base plate 12, which serves as the basic support component of the spring-loaded assembly. Its inner wall is fixedly connected to the inner wall of the lower mold shell 1, providing a stable installation position and a solid support foundation for the entire spring-loaded assembly. The inner wall of the base plate 12 is fixedly connected to the inner wall of the lower mold shell 1. Two grooved plates 13 are fixedly connected to the top of the base plate 12. The grooved plates 13 are fixedly connected to the top of the base plate 12. Their grooved structure provides a specific rotation connection point and movement space restriction for the horizontal plate 14. The horizontal plate 14 is rotatably connected to the top of the grooved plates 13.

[0035] When subjected to an external force, the horizontal plate 14 rotates around its connection point with the grooved plate 13, transmitting the force to the movable block 15 and converting the linear motion of the movable block 15 into its own rotational motion. The top of the horizontal plate 14 is rotatably connected to the movable block 15, which moves linearly under the influence of the horizontal plate 14. Simultaneously, the linear motion of the movable block 15 drives the second horizontal plate 18 to rotate, thus coordinating the movements of the horizontal plates 14 and 18. The top of the movable block 15 is rotatably connected to the second horizontal plate 18, which again converts the linear motion of the movable block 15 into its own rotational motion. The force is transmitted to the grooved plate 19, further realizing the transmission of force and the conversion of motion. The top of the horizontal plate 18 is rotatably connected to the grooved plate 19, which is fixedly connected to the bottom of the force plate 20. Its groove structure provides the horizontal plate 18 with a rotation connection point and a space restriction for movement. The top of the grooved plate 19 is fixedly connected to the force plate 20, which is the final working part of the rebound assembly, receiving the force and motion transmitted by the grooved plate 19. The moving block 15 is slidably connected to the inside of the fixed rod 16, which provides guidance and support for the movement of the moving block 15.

[0036] Reference Figures 1 to 3A telescopic rod 21 is fixedly connected to the top of the lower mold shell 1. The telescopic rod 21 connects the lower mold shell 1 and the upper mold shell 22. Its main function is to enable the upper mold shell 22 to move up and down relative to the lower mold shell 1. During the mold opening and closing process, the telescopic rod 21 drives the upper mold shell 22 and its components to accurately perform mold closing and opening operations with the lower mold shell 1 and its components, ensuring the normal operation of the mold. The top of the telescopic rod 21 is fixedly connected to the upper mold shell 22, which serves as the mounting carrier for the upper mold 23 and the force-applying column 25, providing fixed support for the upper mold. The bottom of the upper mold shell 22 is fixedly connected to the upper mold 23, which directly contacts the casting. The shape of its cavity determines the shape of the casting. During low-pressure casting, after the molten metal is injected into the cavity, the upper mold 23 and the lower mold 24 work together to cool and solidify the molten metal within the cavity, thereby obtaining the casting of the desired shape. The bottom of the upper mold shell 22 is fixedly connected to the force-applying column 25. When the upper mold shell 22 descends to close the mold, the force-applying column 25 strikes the force plate 20, causing it to move downwards and activating its rebound assembly. After the upper mold shell 22 moves downwards, the force-applying column 25 contacts the support plate 20. When the upper mold shell moves downward, it drives the force-applying column downward, so that the outside of the force-applying column contacts the support plate, thereby applying pressure to the force plate. The top of the lower mold shell 1 is fixedly connected to the lower mold 24, which corresponds to the upper mold 23 and together constitutes the forming cavity of the casting. One side of the rotating plate 3 9 contacts the lower mold 24 when the cylinder 3 moves forward. The bottom of the push block 4 is slidably connected to the guide plate 11, which is fixedly connected to the top of the support plate 2 and slidably connected to the bottom of the push block 4. Its main function is to provide guidance and limit for the linear movement of the push block 4, ensuring that the push block 4 can move accurately along the predetermined linear direction under the drive of the cylinder 3, thereby ensuring that other components connected to the push block 4 can move according to the design requirements.

[0037] The bottom of the guide plate 11 is fixedly connected to the top of the support plate 2. The outside of the moving plate 7 is slidably connected to the fixed block 10. The fixed block 10 is slidably connected to the outside of the moving plate 7 and plays a guiding and limiting role in the movement of the moving plate 7. The bottom of the fixed block 10 is fixedly connected to the top of the support plate 2. The left side of the moving block 15 is fixedly connected to the spring 17. One end of the spring 17 is fixedly connected to the left side of the moving block 15. When the moving block 15 moves linearly under the action of the first horizontal plate 14 and the second horizontal plate 18, the spring 17 will be stretched or compressed, storing or releasing elastic potential energy, so that the final force plate 20 hits the force column 25, thereby accelerating the upward speed of the mold 23 on it. The outside of the spring (17) is slidably connected to the outside of the fixed rod (16). The movement of the moving block carries the spring to move on the fixed rod, thereby compressing it and releasing the force on the moving block.

[0038] Working principle: When casting begins, the mold is fixed, which activates cylinder 3. Cylinder 3 moves push block 4, causing fixed shaft 5 to rotate rotating plate 6. Rotation of rotating plate 6 causes moving plate 7 to move within fixed block 10. Moving plate 7 to a fixed position within fixed block 10 causes rotating plate 8 to rotate, which in turn causes rotating plate 9 to rotate. Rotating plate 9 then tightly clamps the upper and lower molds 24, thus initiating casting. This allows for rapid mold disassembly and replacement, improves mold maintenance efficiency, reduces equipment downtime, and flexibly responds to different production needs, enhancing production adaptability.

[0039] When casting begins and the upper mold shell 22 moves downward, it moves the force-applying plate downward, causing the force-applying column 25 to press against the force-receiving plate 20. This causes the force-receiving plate 20 to move downward, rotating the second horizontal plate 18 and moving the moving block 15. This causes the first horizontal plate 14 to rotate, pushing the moving plate 7. The movement of the two moving blocks 15 compresses the spring 17. After casting and cooling, the upper mold 23 stops applying force and begins to move upward. The spring 17 then releases its force, causing the moving blocks 15 to move to both sides. This causes the force-receiving plate 20 to apply pressure against the force-applying column 25, thus accelerating the separation of the upper mold 23 from the lower mold 24. This prevents the upper and lower molds 24 from becoming stuck together after casting, thus preventing them from becoming stuck after casting. In addition, it facilitates mold separation and cleaning, improving production efficiency. This reduces the risk of mold damage and extends the service life of the mold.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-pressure casting mold insert structure, comprising a lower mold shell (1), characterized in that: A support plate (2) is fixedly connected to the inner wall of the lower mold shell (1). A cylinder (3) is fixedly connected to the top of the support plate (2). A push block (4) is fixedly connected to the drive end of the cylinder (3). A fixed shaft (5) is fixedly connected to the top of the push block (4). Two rotating plates (6) are rotatably connected to the outside of the fixed shaft (5). A moving plate (7) is rotatably connected to the other side of the rotating plate (6). A rotating plate (8) is rotatably connected to the other side of the moving plate (7). A rotating plate (9) is rotatably connected to the rear side of the rotating plate (8). A springback assembly for preventing the mold from being fixed is fixedly connected to the inner wall of the lower mold shell (1).

2. The low-pressure casting mold insert structure according to claim 1, characterized in that: The rebound assembly includes a base plate (12), the inner wall of which is fixedly connected to the inner wall of the lower mold shell (1). The top of the base plate (12) is fixedly connected to two grooved plates (13). The top of the grooved plates (13) is rotatably connected to a horizontal plate (14). The top of the horizontal plate (14) is rotatably connected to a moving block (15). The top of the moving block (15) is rotatably connected to a horizontal plate (18). The top of the horizontal plate (18) is rotatably connected to a grooved plate (19). The top of the grooved plate (19) is fixedly connected to a force-bearing plate (20). The inside of the moving block (15) is slidably connected to a fixed rod (16).

3. The low-pressure casting mold insert structure according to claim 1, characterized in that: The top of the lower mold shell (1) is fixedly connected to a telescopic rod (21), the top of the telescopic rod (21) is fixedly connected to an upper mold shell (22), and the bottom of the upper mold shell (22) is fixedly connected to an upper mold (23).

4. The low-pressure casting mold insert structure according to claim 3, characterized in that: The bottom of the upper mold shell (22) is fixedly connected to a force-applying column (25), and the outside of the force-applying column (25) contacts the inner wall of the support plate (2) after the upper mold shell (22) moves downward.

5. The low-pressure casting mold insert structure according to claim 1, characterized in that: The lower mold (24) is fixedly connected to the top of the lower mold shell (1), and one side of the rotating plate (9) contacts the left and right sides of the lower mold (24) when the cylinder (3) moves forward.

6. The low-pressure casting mold insert structure according to claim 1, characterized in that: The bottom of the push block (4) is slidably connected to a guide plate (11), and the bottom of the guide plate (11) is fixedly connected to the top of the support plate (2).

7. The low-pressure casting mold insert structure according to claim 1, characterized in that: The movable plate (7) is slidably connected to a fixed block (10), and the bottom of the fixed block (10) is fixedly connected to the top of the support plate (2).

8. The low-pressure casting mold insert structure according to claim 2, characterized in that: A spring (17) is fixedly connected to the left side of the movable block (15), and the outside of the spring (17) is slidably connected to the outside of the fixed rod (16).

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