Die-casting die
By setting up a central gate and a shunt cone structure in the die-casting mold, the problem of uneven flow of metal liquid is solved, uniform distribution of metal liquid and high-quality molding of parts are achieved, and the mechanical properties and molding quality of parts are improved.
Patent Information
- Application Number
- CN202422450204.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-10
AI Technical Summary
When existing die-casting molds are made of large integrated parts, the metal liquid flows unevenly inside the mold, which affects the molding effect and mechanical properties of the parts.
A die-casting mold is designed. By setting the central gate corresponding to the die-casting part on the fixed mold, and using a combined structure of a diversion cone, a main runner and a branch runner, the metal liquid flows from the center into the mold cavity and then flows toward the surroundings. The diversion cone abuts against the lower edge of the gate to prevent the metal liquid from flowing directly downflow and improves fluidity and uniformity.
It improves the distribution uniformity of metal liquid, forms a uniform grain structure, enhances the mechanical properties and reliability of parts, reduces molding defects, ensures chemical composition consistency, and improves the molding quality and dimensional accuracy of parts.
Smart Images
Figure CN223185523U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a die-casting mold. Background Art
[0002] With the development of the automotive industry, the demand for large structural parts, such as car bodies, is increasing. Die-casting technology, as an efficient and economical metal forming method, is widely used in the manufacture of large, one-piece parts such as automobile bodies. However, existing die-casting molds, when manufacturing large, one-piece parts, suffer from uneven flow of molten metal within the mold, affecting the part's molding quality and mechanical properties. Utility Model Content
[0003] The main purpose of the utility model is to provide a die-casting mold, aiming to improve the molding effect of parts.
[0004] To achieve the above objectives, the present invention provides a die-casting mold, which includes:
[0005] A fixed mold, the fixed mold having a gate, the gate being arranged corresponding to the center of the die-casting; and
[0006] A movable mold, the movable mold comprising a movable mold frame, a movable mold core arranged on the movable mold frame, a diverter cone connected to the movable mold frame and / or the movable mold core, and a runner plate arranged on the movable mold core, the runner plate being provided with a main runner and a branch runner connected to the main runner, a plurality of branch runners being provided at intervals along the circumference of the die-cast part, and the diverter cone being provided with a diverter channel connected to the main runner; when the fixed mold and the movable mold are closed, the free end of the diverter cone extends into the gate and abuts against at least the lower edge of the gate.
[0007] In one embodiment, two main runners are provided, and the two main runners are provided on both sides of the diverter cone. Each main runner extends in an arc shape from top to bottom and connects a portion of the plurality of branch runners.
[0008] In one embodiment, the plurality of branch runners are located away from one end of the main runner toward different positions on the periphery of the part to be die-cast.
[0009] In one embodiment, the diverter cone includes a cone seat and a cone connected to the cone seat, the cone seat is connected to the movable mold core and / or the movable mold frame, one end of the cone is connected to the cone seat, and the other end of the cone extends toward the gate, and the diverter channel is arranged on the cone and extends along the axial direction of the cone.
[0010] In one embodiment, the diversion channel is configured as a recessed groove.
[0011] In one embodiment, the fixed mold includes a fixed mold frame and a fixed mold core arranged on the fixed mold frame, the gate is arranged on the fixed mold core, the die-casting mold also includes a barrel, one end of the barrel extends into the gate, and the diversion channel is connected to the barrel.
[0012] In one embodiment, the fixed mold frame and / or the movable mold frame is configured as a casting mold frame.
[0013] In one embodiment, the fixed mold frame and / or the movable mold frame is provided with a hollow structure.
[0014] In one embodiment, the die-casting mold further includes a rejection system, wherein the rejection system includes a slag bag and a vacuum branch connected to the slag bag, and the slag bag is arranged along the periphery of the part to be die-cast.
[0015] In one embodiment, the die-casting mold further includes a slider assembly, the slider assembly includes a slider provided on the movable mold frame and a slide cavity provided on the fixed mold, and the slider and the slide cavity cooperate with each other.
[0016] The technical solution of the present application, by setting a gate corresponding to the center of the die-casting part on the fixed mold, can allow the molten metal to enter the mold cavity from the center of the die-casting part. Moreover, the molten metal entering from the gate first flows to the diverter cone, and then flows toward the periphery of the die-casting part through the main runner and branch runner on the runner plate, thereby improving the uniformity of the distribution of the molten metal. The uniform molten metal can form a uniform grain structure, thereby improving the mechanical properties and reliability of the part, and can also ensure the consistency of the chemical composition, prevent uneven performance or local defects caused by component segregation, help reduce internal stress and deformation, and thus improve the molding quality. In addition, because the diverter cone abuts the lower edge of the gate, it can prevent the molten metal flowing from the gate from flowing directly downward and gathering under the action of gravity, thereby improving the fluidity of the molten metal in the die cavity. The molten metal with good fluidity can be better filled, thereby reducing molding defects such as pores and shrinkage cavities, and can also ensure the integrity and dimensional accuracy of the part, avoid meat loss or thin walls caused by insufficient filling, thereby improving the molding quality of the part. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0018] Figure 1 The structure of the die-casting mold embodiment of the utility model is shown as follows Figure 1 ;
[0019] Figure 2 This is a schematic diagram of a partial cross-sectional structure of an embodiment of a die-casting mold of the present utility model;
[0020] Figure 3 The structure of the movable mold in the embodiment of the die-casting mold of the utility model is shown as follows: Figure 1 ;
[0021] Figure 4 This is a structural diagram of the diverter cone in the embodiment of the die-casting mold of the present utility model;
[0022] Figure 5 The structure of the movable mold in the embodiment of the die-casting mold of the utility model is shown as follows: Figure 2 ;
[0023] Figure 6 This is a structural diagram of the fixed mold in the embodiment of the die-casting mold of the present utility model;
[0024] Figure 7 The structure of the die-casting mold embodiment of the utility model is shown as follows Figure 2 ;
[0025] Figure 8 This is a partial structural diagram of an embodiment of a die-casting mold of the present utility model.
[0026] Description of Figure Numbers:
[0027] 100, fixed mold; 110, gate; 120, fixed mold frame; 130, fixed mold core; 200, movable mold; 210, movable mold frame; 220, movable mold core; 230, diverter cone; 231, diverter channel; 232, cone seat; 233, cone; 240, runner plate; 241, main runner; 242, branch runner; 300, barrel; 400, rejection system; 410, slag bag; 420, vacuum branch; 500, slider assembly; 600, hollow structure.
[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the embodiments of the present invention.
[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, in the embodiments of the present invention, the descriptions of "first," "second," etc. are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the embodiments of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0032] In the embodiments of the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present invention.
[0034] With the development of the automotive industry, the demand for large structural parts, such as car bodies, is increasing. Die-casting technology, as an efficient and economical metal forming method, is widely used in the manufacture of large, one-piece parts such as automobile bodies. However, existing die-casting molds, when manufacturing large, one-piece parts, suffer from uneven flow of molten metal within the mold, affecting the part's molding quality and mechanical properties.
[0035] In view of this, an embodiment of the utility model provides a die-casting mold, in which the diverter cone abuts the lower edge of the gate, thereby preventing the molten metal flowing in from the gate from flowing directly downward and gathering under the action of gravity, thereby improving the fluidity of the molten metal in the mold cavity and further improving the molding quality of the parts.
[0036] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.
[0037] like Figure 1 As shown, the embodiment of the present invention provides a die-casting mold, which includes:
[0038] A fixed mold 100 having a gate 110 , the gate 110 being arranged corresponding to the center of the part to be die-cast; and
[0039] The movable mold 200 includes a movable mold frame 210, a movable mold core 220 disposed on the movable mold frame 210, a diverter cone 230 connected to the movable mold core 220 and / or the movable mold frame 210, and a runner plate 240 disposed on the movable mold core 220. The runner plate 240 is provided with a main runner 241 and branch runners 242 connected to the main runner 241. Multiple branch runners 242 are provided at intervals along the circumference of the die-cast part. The diverter cone 230 is provided with a diverter channel 231 connected to the main runner 241. When the fixed mold 100 and the movable mold 200 are closed, the free end of the diverter cone 230 extends into the gate 110 and abuts at least the lower edge of the gate 110. In one embodiment, the diverter cone 230 is connected to the movable mold frame 210, may be connected to the movable mold core 220, or may be connected to both the movable mold frame 210 and the movable mold core 220 simultaneously, without limitation herein.
[0040] In the technical solution adopted in this embodiment, by providing a gate 110 on the fixed mold 100 corresponding to the center of the die-cast part, molten metal can enter the mold cavity from the center of the die-cast part. Furthermore, the molten metal entering through the gate 110 first flows toward the diverter cone 230, then flows through the main runner 241 and branch runners 242 on the runner plate 240 toward the periphery of the die-cast part. This improves the uniformity of the molten metal distribution. This uniform molten metal can form a uniform grain structure, thereby improving the mechanical properties and reliability of the part. It also ensures the consistency of the chemical composition, prevents uneven performance or local defects caused by compositional segregation, helps reduce internal stress and deformation, and thus improves molding quality. Furthermore, because diverter cone 230 abuts the lower edge of gate 110, it prevents the molten metal flowing from gate 110 from flowing directly downward and converging under the action of gravity. This improves the fluidity of the molten metal in the mold cavity. This fluid molten metal allows for better filling, thereby reducing molding defects such as air holes and shrinkage cavities. It also ensures the integrity and dimensional accuracy of the part, avoiding missing parts or thin walls caused by insufficient filling, thereby improving the molding quality of the part. Compared to methods that use a flexible diverter cone 230 to open or seal gate 110, this method eliminates the need for an elastic member, resulting in a simpler structure.
[0041] In this embodiment, the movable mold 200 and the fixed mold 100 are arranged horizontally. The movable mold 200 is connected to the movable base plate of the die-casting machine and can move horizontally toward or away from the fixed mold 100 under the influence of the movable base plate, thereby achieving mold closing or mold opening. The fixed mold 100 is connected to the static base plate of the die-casting machine and can be fixed with clamping pins to achieve the fixed mold 100. The gate 110 on the fixed mold 100 is connected to the injection unit of the die-casting machine. When the mold is closed, the injection unit injects molten metal into the gate 110, which then fills the mold cavity for die casting.
[0042] In one embodiment of the present invention, two main runners 241 are provided, located on either side of the diverter cone 230. Each main runner 241 extends in an arc from top to bottom and connects to a portion of the multiple branch runners 242. As can be understood, the molten metal flowing through the diverter cone 230 is split into two, flowing toward the main runners 241 on either side of the diverter cone 230. This allows molten metal to flow into both sides of the diverter cone 230 and then be separated to the surrounding areas through the corresponding branch runners 242. This further improves the fluidity and uniformity of the molten metal distribution, thereby enhancing molding quality.
[0043] In one embodiment of the present invention, multiple branch runners 242 are directed away from one end of the main runner 241 toward different locations on the periphery of the die-cast part. This allows the molten metal to flow to multiple locations on the periphery of the die-cast part and then fill them simultaneously, further improving the molding quality.
[0044] In one embodiment of the present invention, the diverter cone 230 includes a cone seat 232 and a cone 233 connected to the cone seat 232. The cone seat 232 is connected to the movable mold frame 210 and / or the movable mold core 220. One end of the cone 233 is connected to the cone seat 232, and the other end of the cone 233 extends toward the gate 110. The diverter channel 231 is provided on the cone 233 and extends along the axial direction of the cone 233. It will be understood that the cone seat 232 is provided on the movable mold frame 210, one end of the cone 233 passes through the movable mold core 220 and is connected to the cone seat 232, and the other end of the cone 233 is used to cooperate with the gate 110 to partially seal the gate 110. That is, the other end of the cone 233 can extend into the interior of the gate 110. The outer periphery of the cone 233 abuts the lower edge of the gate 110, while there is a gap between the outer periphery of the cone 233 and the upper edge of the gate 110. The molten metal entering through the gate 110 flows between the outer periphery of the cone 233 and the upper edge of the gate 110. To facilitate the flow of the molten metal, a diverter channel 231 is provided on the outer periphery of the cone 233 facing the upper edge of the gate 110. The diverter channel 231 extends along the axial direction of the cone 233, allowing the molten metal to flow along the diverter channel 231 to the main runner 241.
[0045] In one embodiment of the present invention, the diverter channel 231 is configured as a recessed groove, which can simplify the structure of the diverter channel 231 and reduce the complexity of the process.
[0046] In one embodiment of the present invention, the fixed mold 100 includes a fixed mold frame 120 and a fixed mold core 130 disposed within the fixed mold frame 120. A gate 110 is disposed within the fixed mold core 130. The die-casting mold further includes a barrel 300, one end of which extends into the gate 110. A diverter channel 231 communicates with the barrel 300. It will be appreciated that after passing through the head plate of the die-casting machine, the barrel 300 is connected to the injection unit. The molten metal poured into the barrel 300 flows toward the diverter cone 230 under the action of the injection unit and then enters the die cavity.
[0047] In one embodiment of the present invention, the fixed mold frame 120 and / or the movable mold frame 210 are configured as casting mold frames. The surface hardness of the casting mold frame is relatively high, capable of withstanding the pressure of high-temperature molten metal and maintaining the stability of the mold shape and size. Furthermore, mold frames with complex shapes and precise dimensions can be produced. Furthermore, the material cost used during casting is relatively low, which can reduce the development cost of the mold. Optionally, the casting mold frame is made of ductile iron, which has high strength and high toughness, is easy to cast, and can produce castings with complex shapes.
[0048] In one embodiment of the present invention, the fixed mold frame 120 and / or the movable mold frame 210 are provided with a hollow structure 600. This hollow structure 600 can significantly reduce the overall weight of the mold and also reduce energy loss during mold production, resulting in better mold thermal balance and more stable production. Optionally, the hollow structure 600 is provided in the form of a plurality of through holes.
[0049] In one embodiment of the present invention, the die-casting mold further includes an exhaust system 400, which includes a slag bag 410 and a vacuum branch 420 connected to the slag bag 410. The slag bag 410 is disposed along the periphery of the die-cast part. Thus, the slag bag 410 disposed along the periphery of the die-cast part facilitates the discharge of cold material from thin-walled parts, thereby improving the post-molding performance of the die-cast part. Furthermore, the vacuum branch 420 is connected to the slag bag 410, and a vacuum hydraulic valve is disposed at the end of the vacuum branch 420, enabling rapid vacuuming, preventing air entrainment in the die-cast part, and improving the post-molding performance of the die-cast part.
[0050] In one embodiment of the present invention, the die-casting mold further comprises a slider assembly 500, which comprises a slider provided on the movable die frame 210 and a slide cavity provided on the fixed die 100, wherein the slider and the slide cavity cooperate with each other. In this way, the movable die 200 and the fixed die 100 can be locked by cooperating with the slider and the slide cavity. Optionally, the slider comprises a slider seat and a slider insert, both of which are made of forging materials to ensure the structural strength of the working position. In one embodiment, a guide structure, such as a guide rod, can also be provided between the slider and the fixed die 100 to improve the mold closing accuracy.
[0051] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the embodiments of the present invention. All equivalent structural transformations made using the description and drawings of the embodiments of the present invention under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the embodiments of the present invention.
Claims
1. A die-casting mold, characterized in that: The die-casting mold comprises: A fixed mold, the fixed mold having a gate, the gate being arranged corresponding to the center of the die-casting; and A movable mold, the movable mold comprising a movable mold frame, a movable mold core arranged on the movable mold frame, a diverter cone connected to the movable mold frame and / or the movable mold core, and a runner plate arranged on the movable mold core, the runner plate being provided with a main runner and a branch runner connected to the main runner, a plurality of branch runners being provided at intervals along the circumference of the die-cast part, and the diverter cone being provided with a diverter channel connected to the main runner; when the fixed mold and the movable mold are closed, the free end of the diverter cone extends into the gate and abuts against at least the lower edge of the gate.
2. The die-casting mold according to claim 1, wherein There are two main runners, which are arranged on both sides of the diverter cone. Each main runner extends in an arc shape from top to bottom and is connected to a part of the multiple branch runners.
3. The die-casting mold according to claim 1 or 2, characterized in that: The plurality of branch runners are located away from one end of the main runner toward different positions on the periphery of the part to be die-cast.
4. The die-casting mold according to claim 1, wherein The diverter cone includes a cone seat and a cone connected to the cone seat, the cone seat is connected to the movable mold core and / or the movable mold frame, one end of the cone is connected to the cone seat, and the other end of the cone extends toward the gate, and the diverter channel is arranged on the cone and extends along the axial direction of the cone.
5. The die-casting mold according to claim 4, wherein: The diversion channel is configured as a recessed groove.
6. The die-casting mold according to claim 1, wherein: The fixed mold includes a fixed mold frame and a fixed mold core arranged on the fixed mold frame, the gate is arranged on the fixed mold core, and the die-casting mold also includes a barrel, one end of the barrel extends into the gate, and the diversion channel is connected to the barrel.
7. The die-casting mold according to claim 6, wherein: The fixed mold frame and / or the movable mold frame are configured as a casting mold frame.
8. The die-casting mold according to claim 7, wherein: The fixed mold frame and / or the movable mold frame is provided with a hollow structure.
9. The die-casting mold according to claim 1, wherein: The die-casting mold further includes a rejection system, which includes a slag bag and a vacuum branch connected to the slag bag, and the slag bag is arranged along the periphery of the part to be die-cast.
10. The die-casting mold according to claim 1, wherein: The die-casting mold further includes a slider assembly, which includes a slider arranged on the movable mold frame and a slide cavity arranged on the fixed mold, and the slider and the slide cavity cooperate with each other.