Concave sprue spreader structure
By designing a concave flow divider cone structure, the problems of stress concentration and oxide scale inclusion in the traditional convex flow divider cone in aluminum alloy wheel hub casting were solved, achieving uniform aluminum liquid flow and oxide scale suppression, thereby improving casting quality and mold service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINHUANGDAO DICASTAL XIONGLONG WHEEL
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional convex flow divider cones suffer from stress concentration, crack defects, and oxide scale inclusions in low-pressure casting of aluminum alloy wheels, affecting casting quality and safety.
A concave flow divider cone structure is adopted, with a smooth transition between the concave structure and the cone body. The cone tip is eliminated, and a concave structure and flow divider channel are set. Combined with the cooling chamber structure, the flowability of aluminum liquid and the contact of oxides are improved. The concave structure with concave and convex features is added to adsorb oxide scale.
It eliminates stress concentration points, improves the uniformity of aluminum melt flow, reduces oxide scale formation, reduces microcracks and oxide scale inclusions, and improves casting quality and mold life.
Smart Images
Figure CN224222712U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum alloy wheel hub casting technology, and in particular to a concave flow divider cone structure. Background Technology
[0002] In the low-pressure casting process of aluminum alloy wheels, the flow divider cone, as the core guiding component of the mold system, directly affects the uniformity of aluminum liquid filling and the wheel forming quality. The traditional convex flow divider cone with a pointed tip, commonly used in the industry, has the following main technical defects:
[0003] 1. Stress concentration and crack defects: There is a sudden change in curvature at the junction of the spherical top and the column of the traditional convex flow divider cone. When the aluminum liquid solidifies, a stress concentration point is formed in this area, which makes the hub riser area prone to micro cracks, reducing the product qualification rate and threatening driving safety.
[0004] 2. Oxide Scale Inclusion: The convex flow divider structure easily generates eddies during aluminum molten flow, increasing the contact area between the aluminum molten material and air, and significantly increasing the amount of oxide scale (Al2O3) formed. Furthermore, traditional convex flow dividers lack oxide scale adsorption structures, and these oxide inclusions in the aluminum molten material will reduce the fatigue strength of the wheel hub.
[0005] Therefore, developing a concave flow divider cone structure for practical production is an urgent problem to be solved. Utility Model Content
[0006] The purpose of this invention is to address the above-mentioned problems by providing a concave flow divider cone structure to solve the problem that existing flow divider cones are prone to causing micro-cracks in the hub riser area, affecting casting quality, while also alleviating the problem of oxide scale inclusions in molten aluminum.
[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0008] A concave flow divider cone structure includes a flow divider cone body, a cone body is provided at the lower end of the flow divider cone body corresponding to the mold cavity, and an inner concave structure is provided at the bottom of the cone body, the inner concave structure smoothly transitioning with the cone body.
[0009] Preferably, the taper of the cone is 10-15° on one side, which ensures the fluidity of the molten aluminum while also taking into account the demolding efficiency.
[0010] Preferably, the depth of the concave structure is 10-15 mm, and the radius of the concave structure is 4-8 mm.
[0011] Preferably, the inner wall of the concave structure is provided with a concave-convex structure, which is formed by protrusions densely distributed on the inner wall of the concave structure.
[0012] Preferably, the cone has a flow channel that connects the concave structure and the cavity.
[0013] Preferably, the flow divider cone body is provided with a cooling cavity for cooling the riser area, the cooling cavity being composed of a cooling recess formed on the flow divider cone body and a cover plate fastened to the cooling recess.
[0014] Preferably, the cover plate is provided with a water inlet and a water return outlet, which are connected to the water inlet pipe and the water return pipe respectively to realize the circulation supply of cooling water.
[0015] The beneficial effects of this invention are as follows: This invention eliminates the cone tip structure of the traditional convex flow divider cone, thus eliminating stress concentration points easily formed in the cone tip area of the traditional convex flow divider cone, alleviating the problem of micro-cracks easily generated at the wheel hub riser, and ensuring the casting quality of the wheel hub. Simultaneously, the concave structure makes the aluminum liquid flow more uniform and stable during mold filling, alleviating the tendency for eddies to form during aluminum liquid flow and reducing the contact opportunity between the aluminum liquid and air, thereby inhibiting the formation of oxide scale to a certain extent. Furthermore, the concave structure has a certain adsorption effect on oxide scale in the aluminum liquid, reducing the possibility of oxide scale flowing into the mold cavity and affecting the casting quality of the wheel hub. Attached Figure Description
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 This is a schematic diagram showing the structure of the present invention in use.
[0019] Figure 3 This is a schematic diagram of a preferred embodiment of the present invention.
[0020] In the diagram: 1--Flow divider cone body; 10--Cone; 11--Concave structure; 12--Concave-convex structure; 13--Flow divider channel; 20--Cooling chamber; 21--Cooling recess; 22--Cover plate; 23--Water inlet; 24--Water return outlet; 25--Water inlet pipe; 26--Water return pipe. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] like Figure 1-3As shown, a concave flow divider cone structure includes a flow divider cone body 1. A cone 10 is disposed at the lower end of the flow divider cone body 1 corresponding to the mold cavity. A concave structure 11 is disposed at the bottom of the cone 10, and the concave structure 11 smoothly transitions into the cone 10. In use, the flow divider cone body 1 is assembled on the top mold, and the top mold, together with the side mold and bottom mold, forms a wheel hub casting cavity. At this time, molten aluminum is pressed into the cavity through the bottom mold gate, performing the filling process. During the filling process, the molten aluminum entering the mold cavity first contacts the cone 10. Since the bottom of the cone 10 is provided with a concave structure 11, some of the molten aluminum will fill the concave structure 11 after entering the mold cavity. Under the action of the concave structure 11, the flow direction of some of the molten aluminum will be changed, achieving the effect of dispersing stress. At the same time, it plays a certain role in stabilizing the flow of molten aluminum, improving the uniformity of the flow of molten aluminum, alleviating the situation that eddies are easily generated when molten aluminum flows, reducing the chance of molten aluminum contacting air, and thus inhibiting the formation of oxide scale to a certain extent.
[0023] This embodiment eliminates the cone tip structure of the traditional convex flow divider cone, thus eliminating stress concentration points that easily form in the cone tip area of the traditional convex flow divider cone. This alleviates the problem of micro-cracks easily forming at the wheel hub riser, ensuring the quality of wheel hub casting. Simultaneously, the concave structure 11 makes the stress on the mold more uniform during casting filling, reducing localized wear and fatigue of the mold, extending mold life, and increasing mold uptime. Furthermore, the concave structure 11 has a certain adsorption effect on oxide scale in the molten aluminum, reducing the possibility of oxide scale flowing into the mold cavity and affecting the quality of wheel hub casting.
[0024] As a preferred embodiment, the single-sided taper of the cone 10 is 10-15°, which ensures the fluidity of the molten aluminum while also taking into account the demolding efficiency.
[0025] Preferably, the depth of the concave structure 11 is 10-15 mm, and the radius of the arc of the concave structure 11 is 4-8 mm.
[0026] Preferably, the inner wall of the concave structure 11 is provided with a concave-convex structure 12, which is formed by protrusions densely distributed on the inner wall of the concave structure, so as to improve the adhesion of oxide scale in the aluminum liquid during filling and reduce the situation of oxide scale entering the mold cavity.
[0027] Preferably, the cone has a flow-diverting channel 13 connecting the concave structure 11 and the mold cavity, which balances the internal and external pressures of the concave structure 11 and further stabilizes the flow. During filling, after the molten aluminum is filled into the concave structure 11, a portion of the molten aluminum will pass through the flow-diverting channel 13 and change its flow direction under the action of the concave structure 11, achieving the effect of stress dispersion and stabilizing the flow of the molten aluminum, thus improving the uniformity of the flow.
[0028] Preferably, the flow divider cone body 1 is provided with a cooling chamber 20 for cooling the riser area. The cooling chamber 20 is composed of a cooling recess 21 formed on the flow divider cone body 1 and a cover plate 22 fastened to the cooling recess 21. The cover plate 22 is provided with a water inlet 23 and a water return outlet 24. The water inlet 23 and the water return outlet 24 are respectively connected to the water inlet pipe (25) and the water return pipe 26 to realize the circulation supply of cooling water and achieve efficient cooling of the riser area.
[0029] The above-disclosed embodiments are merely specific examples of this utility model, but this utility model is not limited thereto. For those skilled in the art, any modifications made without departing from the principle of this utility model should be considered as protected by this utility model.
Claims
1. A concave flow divider cone structure, characterized in that: The device includes a flow divider cone body (1), and a cone (10) is provided at the lower end of the flow divider cone body (1) corresponding to the mold cavity. The bottom of the cone (10) is provided with an inner concave structure (11) recessed in the cone (10), and the inner concave structure (11) and the cone (10) are smoothly transitioned.
2. The concave flow divider cone structure according to claim 1, characterized in that: The single-sided taper of the cone (10) is 10-15°.
3. The concave flow divider cone structure according to claim 1, characterized in that: The depth of the concave structure (11) is 10-15 mm, and the radius of the arc of the concave structure (11) is 4-8 mm.
4. The concave flow divider cone structure according to claim 1, characterized in that: The inner wall of the concave structure (11) is provided with a concave-convex structure (12), which is formed by protrusions densely distributed on the inner wall of the concave structure.
5. The concave flow divider cone structure according to claim 1, characterized in that: The cone (10) has a flow channel (13) that connects the concave structure (11) and the cavity.
6. The concave flow divider cone structure according to claim 1, characterized in that: The main body (1) of the flow divider cone is provided with a cooling cavity (20) for cooling the riser area. The cooling cavity (20) is composed of a cooling pit (21) opened on the main body (1) of the flow divider cone and a cover plate (22) fastened to the cooling pit (21).
7. A concave flow divider cone structure according to claim 6, characterized in that: The cover plate (22) is provided with a water inlet (23) and a water return outlet (24). The water inlet (23) and the water return outlet (24) are respectively connected to the water inlet pipe (25) and the water return pipe (26) to realize the circulation supply of cooling water.