Die-casting die for large component
By setting up multiple vacuum extraction parts and monitoring sensors in the die-casting mold, the problems of uneven vacuum degree and gas rolling in the cavity are solved, and the mechanical properties and manufacturing efficiency of large components are improved.
Patent Information
- Application Number
- CN202420087235.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-12
AI Technical Summary
In the process of integrated die-casting of aluminum alloy, large components are prone to air rolling, resulting in low mechanical properties and product scrapping, and the prior art is difficult to effectively solve the problem of uneven vacuum degree in the cavity.
Design a die-casting mold with large components. Both the fixed mold and the pressing chamber are equipped with multiple vacuum parts. Through multi-stage vacuum technology and monitoring sensors, we ensure that the space positions in the cavity reach a high vacuum degree and avoid the phenomenon of air rolling. And optimize the utilization of vacuum systems.
It improves the mechanical properties and dimensional stability of large components, reduces product defect rate, and achieves a more efficient manufacturing process.
Smart Images
Figure CN222175899U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle body manufacturing, and in particular to a die-casting mold for large components. Background Art
[0002] With the rapid development of new energy electric vehicles, lightweighting has become the unremitting pursuit of new energy electric vehicles. For example, large-scale body components made of aluminum alloy one-piece die-casting can not only reduce the weight of the whole vehicle, but also improve the efficiency of vehicle manufacturing and the torsional stiffness of the vehicle, thus gaining favor from the automotive industry. The rise of aluminum alloy one-piece die-casting technology has enabled large-scale body components such as one-piece rear body, one-piece front cabin, and one-piece battery tray to be quickly mass-produced.
[0003] However, in the manufacturing process, the requirements for the mechanical properties and dimensional stability of large die-castings are relatively high. For example, for one-piece die-castings with a size of 1600mm×1500mm×800mm, there is a lot of liquid injection, and the weight of the product plus the pouring system reaches nearly 90kg. It is molded under high speed and high pressure, and air entrapment is easy to occur in the product, resulting in low mechanical properties of the product or even causing the product to be scrapped. Utility Model Content
[0004] The present application provides a die-casting mold for a large component, which can improve the manufacturing quality of the large component and enhance the mechanical properties.
[0005] A die-casting mold for a large component, comprising:
[0006] A fixed mold and a movable mold, wherein the fixed mold is assembled with the movable mold to form a cavity inside, and the fixed mold is provided with a plurality of first vacuum extraction parts connected with the cavity; and
[0007] A pressure chamber is communicated with the mold cavity and is provided with at least one second vacuum extraction portion.
[0008] Optionally, the fixed mold is further provided with a confluence portion for confluence of multiple overflow channels, and at least one of the first vacuum extraction portions is provided at the confluence portion.
[0009] Optionally, the fixed mold is provided with a plurality of merging locations for merging multiple overflow channels, and each of the merging locations is provided with the first vacuum extraction location.
[0010] Optionally, the fixed mold is further provided with a plurality of third vacuum extraction locations communicated with the mold cavity.
[0011] Optionally, the fixed mold includes an extension channel extending from the confluence portion, and at least one of the third vacuum extraction portions is disposed on the extension channel.
[0012] Optionally, the third vacuuming locations are provided with four; and / or
[0013] The third vacuum pumping position is provided with a wave plate exhaust valve.
[0014] Optionally, the plurality of first vacuuming locations are arranged at two opposite sides of the second vacuuming location along the first direction, and the number of the first vacuuming locations arranged on each side is equal.
[0015] Optionally, the plurality of third vacuum pumping locations are arranged at two opposite sides of the second vacuum pumping location along the first direction, and are located on a side of the first vacuum pumping location away from the second vacuum pumping location.
[0016] Optionally, the second vacuuming portion is provided with a vacuum exhaust channel; and / or
[0017] At least one of the first evacuation locations is provided with a hydraulic vacuum valve; and / or
[0018] There are four first vacuuming locations.
[0019] Optionally, the first vacuum pumping position, the second vacuum pumping position, and the third vacuum pumping position are all provided with monitoring sensors for detecting the vacuum degree in the cavity.
[0020] The present application provides a die-casting mold for large components, wherein the die-casting mold is provided with vacuuming parts on both the fixed mold and the pressure chamber, so that each spatial position in the cavity has an extremely high vacuum degree. For example, the multiple first vacuuming parts provided in the fixed mold can improve the vacuum degree of the cavity throughout the entire die-casting process, and the second vacuuming parts provided in the pressure chamber can improve the vacuum degree of the cavity in the initial stage of die-casting. In this way, it can be set according to different die-casting stages, improving the phenomenon of low vacuum degree and uneven vacuum degree in the cavity, and avoiding the phenomenon of air entrainment in the die-casting process of large components. In the die-casting process, multi-stage vacuuming can be used. For example, it can be selected to vacuum from all vacuuming parts or from part of the vacuuming parts in different die-casting stages. In other words, it is possible to vacuum from different vacuuming parts in different time periods, so that the capacity of the vacuum system can be effectively utilized, the volume of the vacuum tank can be reduced, and it can also ensure that each spatial position in the cavity can simultaneously reach high vacuum during the filling stage. Furthermore, a monitoring sensor may be installed at each vacuuming location to detect the vacuum degree at each vacuuming location, so as to provide feedback on the vacuum degree of the cavity of the die-casting mold during the filling process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic diagram of a die-casting mold shown in an exemplary embodiment of the present application;
[0022] Figure 2 yes Figure 1 Magnified view of site I. DETAILED DESCRIPTION
[0023] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application.
[0024] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
[0025] Please refer to Figure 1 , Figure 1 It is a schematic diagram of a die-casting mold 100 shown in an exemplary embodiment of the present application.
[0026] The present application provides a die-casting mold 100 for large components, wherein the large components include but are not limited to an integrated rear body, an integrated front engine compartment, an integrated battery tray and other large components, which are die-casted using a die-casting mold to improve manufacturing efficiency and achieve mass production. In addition, the die-cast large components have good mechanical properties, high dimensional stability and high yield.
[0027] The die casting mold 100 includes a fixed mold 10, a movable mold (not shown in the figure) and a pressure chamber 30. The fixed mold 10 is assembled with the movable mold to form a cavity inside. The fixed mold 10 is provided with a plurality of first vacuum parts 11 connected to the cavity, and the pressure chamber 30 is provided with at least one second vacuum part 31. The first vacuum part 11 and the second vacuum part 31 can be connected to a vacuum device to generate negative pressure in the cavity and the pressure chamber.
[0028] According to the above description, the die-casting mold 100 is provided with vacuum pumping parts in both the fixed mold 10 and the pressure chamber 30, so that each spatial position in the cavity has an extremely high vacuum degree. For example, the multiple first vacuum pumping parts 11 provided in the fixed mold 10 can improve the vacuum degree of the cavity throughout the entire die-casting process, and the second vacuum pumping part 31 provided in the pressure chamber 30 can improve the vacuum degree of the cavity in the initial stage of die-casting. In this way, it can be set according to different die-casting stages, improving the low vacuum degree and uneven vacuum degree in the cavity, and avoiding the phenomenon of air entrainment in large components during the die-casting process. In the die-casting process, multi-stage vacuum pumping can be used. For example, it can be selected to vacuum from all the vacuum pumping parts or from part of the vacuum pumping parts in different die-casting stages. In other words, vacuum pumping can be performed from different vacuum pumping parts in different time periods, so that the vacuum system capacity can be effectively utilized, the volume of the vacuum tank can be reduced, and it can also ensure that each spatial position in the cavity can simultaneously reach high vacuum during the filling stage.
[0029] In one embodiment, the fixed mold 10 is further provided with a confluence portion 12 for confluence of multiple overflow channels, and at least one of the first vacuuming portions 11 is provided at the confluence portion 12. The confluence portion 12 is connected to the multiple overflow channels, and the first vacuuming portion 11 is provided here to generate negative pressure in the multiple overflow channels, so as to facilitate the formation of vacuum in the multiple overflow channels.
[0030] exist Figure 1 In the embodiment shown, the fixed mold 10 is provided with a plurality of converging parts 12 for the converging of multiple overflow channels, and each converging part 12 is provided with a first vacuuming part 11. For example, a first vacuuming part 11 may be provided at each converging part 12, but the present invention is not limited thereto.
[0031] In one embodiment, the fixed mold 10 is further provided with a plurality of third vacuuming parts 14 connected to the cavity. During the die casting process, the plurality of third vacuuming parts 14 can also be used to increase the vacuum in the cavity, which makes the number of vacuuming parts larger, the distribution wider, and the vacuum degree in the cavity more uniform.
[0032] In one embodiment, the fixed mold 10 is further provided with an extension channel 13 extending from the confluence portion 12, and at least one third vacuum extraction portion 14 is provided in the extension channel 13 and communicates with the extension channel 13. For example, the extension channels 13 may be extended from a plurality of confluence portions 12, and each extension channel 13 may be provided with a third vacuum extraction portion 14, so that the vacuum degree in the extension channel 13 may be increased, thereby increasing the vacuum degree in the cavity.
[0033] In one embodiment, the plurality of first vacuuming locations 11 are arranged along a first direction ( Figure 1 The first vacuuming parts 11 are arranged at two opposite sides of the second vacuuming parts 31 (in the Y direction), and the number of the first vacuuming parts 11 arranged on each side is equal. Figure 1 In the embodiment described above, there are four first vacuuming locations 11, which are arranged at the four vertices of a rectangle, with two first vacuuming locations 11 arranged on one side and the other two first vacuuming locations 11 arranged on the other side. In other embodiments, the first vacuuming locations 11 are not limited to four, but may be three or more, and the arrangement is not limited thereto.
[0034] In one embodiment, the plurality of third vacuuming locations 14 are disposed on two opposite sides of the second vacuuming location 31 along the first direction, and are located on a side of the first vacuuming location 11 away from the second vacuuming location 31. In other words, the plurality of third vacuuming locations 14 are located outside the plurality of first vacuuming locations 11. Figure 1 In the embodiment described above, there are four third vacuuming parts 14, which are arranged at the four vertices of a rectangle and are arranged one by one opposite to the four first vacuuming parts 11 along the first direction. In other embodiments, the third vacuuming parts 14 are not limited to four, but can be three or more, and the arrangement is not limited thereto.
[0035] In one embodiment, the second vacuum pumping portion 31 is provided with a vacuum exhaust channel having a simple structure.
[0036] Please refer to Figure 2 , Figure 2 for Figure 1 Magnified view of site I in the middle.
[0037] In one embodiment, at least one of the first vacuuming parts 11 is provided with a hydraulic vacuum valve 110, which is connected to the vacuuming device and can be controlled to open or close to realize the automation of the vacuuming process. At least one of the third vacuuming parts 14 is provided with a wave plate exhaust valve 140.
[0038] In this embodiment, each first vacuum pumping position 11 is provided with a hydraulic vacuum valve 110. Each third vacuum pumping position 14 is provided with a wave plate type exhaust valve 140.
[0039] In one embodiment, monitoring sensors may be installed at the first vacuum pumping position 11, the second vacuum pumping position 31, and the third vacuum pumping position 14 to detect the vacuum degree at each vacuum pumping position to provide feedback on the vacuum degree of the cavity of the die-casting mold during the filling process.
[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. A die-casting mold for a large component, characterized in that: include: A fixed mold and a movable mold, wherein the fixed mold is assembled with the movable mold to form a cavity inside, and the fixed mold is provided with a plurality of first vacuum extraction parts connected with the cavity; and A pressure chamber is communicated with the mold cavity and is provided with at least one second vacuum extraction portion.
2. The die-casting mold according to claim 1, characterized in that: The fixed mold is also provided with a confluence portion for confluence of multiple overflow channels, and at least one of the first vacuum extraction portions is provided at the confluence portion.
3. The die-casting mold according to claim 2, characterized in that: The fixed mold is provided with a plurality of merging parts for merging multiple overflow channels, and each of the merging parts is provided with the first vacuuming part.
4. The die-casting mold according to claim 2, characterized in that: The fixed mold is also provided with a plurality of third vacuum extraction locations communicated with the mold cavity.
5. The die-casting mold according to claim 4, characterized in that: The fixed mold includes an extension channel extending from the confluence portion, and at least one of the third vacuum extraction portions is disposed on the extension channel.
6. The die-casting mold according to claim 4, characterized in that: There are four third vacuuming locations; and / or The third vacuum pumping position is provided with a wave plate exhaust valve.
7. The die-casting mold according to claim 4, characterized in that: The plurality of first vacuuming locations are arranged at two opposite sides of the second vacuuming location along a first direction, and the number of the first vacuuming locations arranged on each side is equal.
8. The die-casting mold according to claim 7, characterized in that: The plurality of third vacuum pumping locations are disposed at two opposite sides of the second vacuum pumping location along the first direction, and are located on a side of the first vacuum pumping location away from the second vacuum pumping location.
9. The die casting mold according to any one of claims 1 to 8, characterized in that: The second vacuuming portion is provided with a vacuum exhaust channel; and / or At least one of the first evacuation locations is provided with a hydraulic vacuum valve; and / or There are four first vacuuming locations.
10. The die casting mold according to claim 4, characterized in that: The first vacuum pumping position, the second vacuum pumping position, and the third vacuum pumping position are all provided with monitoring sensors for detecting the vacuum degree in the cavity.