Die-casting die design method for eliminating fit clearance between insert and die-casting die core
By designing multiple uniformly distributed compression rods and spring structures in the die-casting mold, the problem of gap between the fitting surfaces of the insert and the die-casting mold is solved, and the effect of no aluminum alloy skin on the surface of the insert is achieved, improving product quality and working efficiency.
Patent Information
- Application Number
- CN202411912214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-06-13
AI Technical Summary
During the aluminum alloy die-casting process, there is a gap between the insert and the mating surface of the die-casting mold, resulting in an extra layer of aluminum alloy skin on the insert, which is difficult to clean and cannot meet the product requirements.
A die-casting mold is designed, in which there are multiple compression rods in the static mold, all of which are arranged in the corresponding fitting holes of the static liner die. A spring is provided between the bottom of each compression rod and the bottom plate of the static mold. The top of the compression rod is in contact with the movable mold insert. The elastic force of the spring makes the top of the compression rod close to the movable mold insert, eliminating the gap between the insert and the die-casting model core.
Effectively eliminate the gap between the insert and the die-casting mold mating surface, avoiding the appearance of aluminum alloy skin between the insert and the mold mating surface during the die-casting process, reducing the labor intensity of employees and improving work efficiency and product quality.
Smart Images
Figure CN120133474A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a die-casting mold for automotive parts, specifically a die-casting mold design method for eliminating the clearance between the insert and the die-casting mold core. Background Art
[0002] With the development of new energy vehicles, higher requirements are put forward for the strength of aluminum alloy die-castings, and the application of steel inserts in aluminum alloy die-castings is also increasing. For example, Figure 5 a prior art die-casting mold as shown includes a moving mold, a stationary mold, and a moving mold insert 4. The moving mold is provided with a moving mold bottom plate 1, a moving mold core 2, and a moving mold liner 3. The stationary mold is provided with a pressing rod 5, a stationary mold liner 6, and a stationary mold bottom plate 9. Due to the complex product structure, there is a clearance between the insert and the mating surface of the die-casting mold. At the same time, the outer dimension of the pressing rod 5 is fixed, and the clearance between the insert and the mating surface of the die-casting mold cannot be adjusted, resulting in the appearance of aluminum alloy skin 10 between the insert and the mold mating surface during die-casting. After the die-casting part is formed, there is an extra layer of aluminum alloy skin 10 on the insert of the die-casting part, and this aluminum alloy skin 10 is not easy to clean and cannot meet the product requirements. Summary of the Invention
[0003] The purpose of the present invention is to eliminate the clearance between the insert and the die-casting mold core and solve the problem of the appearance of aluminum alloy skin between the insert and the mold mating surface during die-casting.
[0004] To achieve the above purpose, the present invention adopts the following technical solutions. A die-casting mold design method for eliminating the clearance between the insert and the die-casting mold core includes a moving mold, a stationary mold, and a moving mold insert. The moving mold is provided with a moving mold bottom plate, a moving mold core, and a moving mold liner. The stationary mold is provided with a pressing rod, a stationary mold liner, and a stationary mold bottom plate. There are multiple pressing rods in the stationary mold, which are evenly distributed in the corresponding mating holes of the stationary mold liner. A spring is provided between the bottom of each pressing rod and the stationary mold bottom plate, and the top of each pressing rod contacts the moving mold insert. The steps of the die-casting mold design method for eliminating the clearance between the insert and the die-casting mold core are as follows: First, insert multiple pressing rods into the corresponding mating holes of the stationary mold liner. A spring is pressed between the bottom of each pressing rod and the stationary mold bottom plate, and at the same time, fix the stationary mold liner to the stationary mold bottom plate. Then, fix the moving mold core and the moving mold liner to the corresponding positions on the moving mold bottom plate. The inner hole of the moving mold liner is tightly fitted with the moving mold core, and at the same time, tightly fit the small-diameter hole of the moving mold insert on the small-diameter cylinder of the moving mold core. Finally, close the moving mold and the stationary mold. After closing the mold, the pressing rod makes the top of the pressing rod closely adhere to the moving mold insert through the elastic force of the spring, and at the same time, the elastic force makes the moving mold insert closely adhere to the moving mold liner to eliminate the clearance.
[0005] Further, the moving core and the moving lining die in the moving die are fixedly connected to the corresponding positions on the moving die bottom plate. The inner hole of the moving lining die is in tight fit with the moving core, and the small-diameter cylinder of the moving core is in tight fit with the small-diameter hole of the moving die insert.
[0006] Further, the static lining die in the static die is fixedly connected to the corresponding position on the static die bottom plate.
[0007] Further, the pressing rod can move independently in the corresponding fitting hole of the static lining die.
[0008] Further, the fixed connections of the moving core, the moving lining die to the moving die bottom plate, and the static lining die to the static die bottom plate are all bolt connections.
[0009] The beneficial effects of the present invention: Compared with the prior art, the present invention can effectively eliminate the gap between the insert and the mating surface of the die-casting die, avoid the appearance of aluminum alloy skin between the insert and the die mating surface during the die-casting process, reduce the labor intensity of employees, and improve work efficiency and product quality. Description of the Drawings
[0010] Figure 1 is a schematic cross-sectional structure diagram of a die-casting die design method for eliminating the clearance between the insert and the die-casting core of the present invention; Figure 2 is Figure 1 the partial enlarged structure diagram of I in Figure 3 is a schematic cross-sectional structure diagram of the static die part of a die-casting die design method for eliminating the clearance between the insert and the die-casting core of the present invention; Figure 4 is a schematic cross-sectional structure diagram of the moving die part of a die-casting die design method for eliminating the clearance between the insert and the die-casting core of the present invention; Figure 5 is a schematic cross-sectional structure diagram of an insert casting of the prior art; Figure 6 is a schematic cross-sectional structure diagram of a die-casting die for insert casting of the prior art; Figure 7 is Figure 6 the partial enlarged structure diagram of II in
[0011] As shown in the figure: 1 - moving die bottom plate, 2 - moving core, 3 - moving lining die, 4 - moving die insert, 5 - pressing rod, 6 - static lining die, 7 - die-casting part, 8 - spring, 9 - static die bottom plate, 10 - aluminum alloy skin. Detailed Embodiments
[0012] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the drawings.
[0013] AsFigures 1 to 4 As shown, the die-casting mold design method for eliminating the fitting clearance between the insert and the die-casting mold core includes a moving mold, a stationary mold, and a moving mold insert 4. The moving mold is provided with a moving mold bottom plate 1, a moving mold core 2, and a moving mold lining 3. The stationary mold is provided with a pressing rod 5, a stationary mold lining 6, and a stationary mold bottom plate 9. There are multiple pressing rods 5 in the stationary mold, which are evenly distributed in the corresponding fitting holes of the stationary mold lining 6. A spring 8 is provided between the bottom of each pressing rod 5 and the stationary mold bottom plate 9, and the top of each pressing rod 5 contacts the moving mold insert 4; The steps of the die-casting mold design method for eliminating the fitting clearance between the insert and the die-casting mold core are as follows: First, insert multiple pressing rods 5 into the corresponding fitting holes of the stationary mold lining 6. A spring 8 is pressed between the bottom of each pressing rod 5 and the stationary mold bottom plate 9, and at the same time, fix the stationary mold lining 6 to the stationary mold bottom plate 9; Then, fixedly connect the moving mold core 2 and the moving mold lining 3 to the corresponding positions on the moving mold bottom plate 1. The inner hole of the moving mold lining 3 is tightly fitted with the moving mold core 2, and at the same time, tightly fit the small-diameter hole of the moving mold insert 4 on the small-diameter cylinder of the moving mold core 2; Finally, close the moving mold and the stationary mold. After closing the mold, the pressing rod 5 makes the top of the pressing rod 5 closely adhere to the moving mold insert 4 through the elastic force of the spring 8. At the same time, the elastic force makes the moving mold insert 4 closely adhere to the moving mold lining 3 to eliminate the clearance; In this implementation scheme, after the moving mold and the stationary mold are closed, the elastic force provided by the spring 8 is transmitted to the moving mold insert 4 through the pressing rod 5, so that the moving mold insert 4 always closely adheres to the moving mold lining 3, thereby effectively eliminating the clearance between the insert and the fitting surface of the die-casting mold and avoiding the appearance of aluminum alloy skin 10 between the insert and the fitting surface of the mold during the die-casting process.
[0014] As Figure 3 shown, the moving mold core 2 and the moving mold lining 3 in the moving mold are fixedly connected to the corresponding positions on the moving mold bottom plate 1. The inner hole of the moving mold lining 3 is tightly fitted with the moving mold core 2, and the small-diameter cylinder of the moving mold core 2 is tightly fitted with the small-diameter hole of the moving mold insert 4.
[0015] As Figure 2 shown, the stationary mold lining 6 in the stationary mold is fixedly connected to the corresponding position on the stationary mold bottom plate 9.
[0016] As Figure 2 shown, the pressing rod 5 can move independently in the corresponding fitting hole of the stationary mold lining 6. This implementation scheme is to ensure that the elastic force provided by the spring 8 is transmitted to the moving mold insert 4 through the pressing rod 5.
[0017] As Figures 1 to 3 shown, the fixed connections of the moving mold core 2, the moving mold lining 3 to the moving mold bottom plate 1, and the fixed connection of the stationary mold lining 6 to the stationary mold bottom plate 9 are all bolt connections; In this embodiment, the fixed connection can be achieved by various methods such as welding, bonding, and bolt connection. Bolt connection is preferred as it facilitates the disassembly and replacement of the mold.
[0018] The specific working principle of the present invention: First, insert a plurality of pressing rods 5 into the corresponding mating holes of the static lining mold 6. A spring 8 is pressed between the bottom of each pressing rod 5 and the static mold bottom plate 9. At the same time, fix the static lining mold 6 to the static mold bottom plate 9. Then, fixedly connect the moving mold core 2 and the moving lining mold 3 to the corresponding positions on the moving mold bottom plate 1. The inner hole of the moving lining mold 3 is in a tight fit with the moving mold core 2. At the same time, tightly fit the small-diameter hole of the moving mold insert 4 onto the small-diameter cylinder of the moving mold core 2. Finally, close the moving mold and the static mold. After closing the mold, the pressing rod 5 presses against the moving mold insert 4 at the top by the elastic force of the spring 8. At the same time, the elastic force makes the moving mold insert 4 closely adhere to the moving lining mold 3 to eliminate the gap.
[0019] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any simple modifications, equivalent replacements, improvements, etc. made within the technical concept of the present invention shall be included within the protection scope of the present invention.
Claims
1. A method for designing a die casting mold for eliminating the gap between an insert and a die casting mold core, comprising a movable mold, a static mold, and a movable mold insert (4), wherein the movable mold is provided with a movable mold bottom plate (1), a movable mold core (2), and a movable lining mold (3), and the static mold is provided with a clamping rod (5), a static lining mold (6), and a static mold bottom plate (9), characterized in that: The static mold has a plurality of clamping rods (5) which are evenly distributed in corresponding matching holes of the static lining mold (6), wherein a spring (8) is provided between the bottom of each clamping rod (5) and the static mold bottom plate (9), and the top of each clamping rod (5) is in contact with the dynamic mold insert (4); The steps of the die-casting mold design method for eliminating the matching gap between the insert and the die-casting model core are as follows: First, a plurality of pressing rods (5) are inserted into corresponding matching holes of the static lining mold (6), wherein a spring (8) is pressed between the bottom of each pressing rod (5) and the static mold bottom plate (9), and the static lining mold (6) is fixedly connected to the static mold bottom plate (9); Then, the movable mold core (2) and the movable liner mold (3) are fixedly connected to corresponding positions of the movable mold bottom plate (1), the inner hole of the movable liner mold (3) is tightly matched with the movable mold core (2), and at the same time, the small-diameter hole of the movable mold insert (4) is tightly matched with the small-diameter cylinder of the movable mold core (2); Finally, the movable mold and the static mold are closed. After the molds are closed, the top of the clamping rod (5) is pressed against the movable mold insert (4) by the elastic force of the spring (8). At the same time, the elastic force causes the movable mold insert (4) to be pressed against the movable liner (3) to eliminate the gap.
2. A die-casting mold design method for eliminating the matching gap between the insert and the die-casting mold core according to claim 1, characterized in that: The movable mold core (2) and the movable liner mold (3) in the movable mold are fixedly connected to corresponding positions of the movable mold bottom plate (1); the inner hole of the movable liner mold (3) is tightly matched with the movable mold core (2); and the small-diameter cylinder of the movable mold core (2) is tightly matched with the small-diameter hole of the movable mold insert (4).
3. A die-casting mold design method for eliminating the matching gap between the insert and the die-casting mold core according to claim 2, characterized in that: The static lining mold (6) in the static mold is fixedly connected to a corresponding position of the static mold bottom plate (9).
4. A die-casting mold design method for eliminating the matching gap between the insert and the die-casting mold core according to claim 3, characterized in that: The pressing rod (5) can move independently in the corresponding matching hole of the static lining mold (6).
5. A die-casting mold design method for eliminating the matching gap between the insert and the die-casting mold core according to any one of claims 1 to 4, characterized in that: The fixed connection between the dynamic mold core (2), the dynamic lining mold (3) and the dynamic mold bottom plate (1), and the fixed connection between the static lining mold (6) and the static mold bottom plate (9) are all bolted connections.