Low-pressure casting mold using inner rim to assist pressurization
By designing an inner rim pressure block and an active cooling device in the low-pressure casting mold, the shrinkage porosity problem during the solidification process of aluminum wheels was solved, achieving efficient and uniform solidification of aluminum wheels and improving the strength and production efficiency of the castings.
Patent Information
- Application Number
- CN202521056211.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-27
AI Technical Summary
In existing low-pressure casting processes, aluminum wheel products are prone to shrinkage defects during solidification, which affect forming quality and production costs. In particular, when the solidification sequence of the inner rim, outer rim, spokes, and flange is not good, the aluminum matrix is not strong enough and is prone to cracking.
The low-pressure casting mold with inner rim auxiliary pressure is used. By designing pressure blocks on the top mold and combining them with an active cooling device, synchronous pressure is applied and solidified in the cavity, ensuring synchronous solidification of the rim, spokes, outer rim and flange, and avoiding shrinkage defects.
It improves the strength and production efficiency of castings, enhances the uniformity of the solidification process, reduces shrinkage defects, and improves the forming quality and production efficiency of wheels.
Smart Images
Figure CN223946783U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to foundry technical field, concretely relates to a low pressure casting mould of using inner rim auxiliary pressure. BACKGROUND
[0002] Low pressure casting forming process has the advantages of stable filling, high metal utilization rate, low cost and the like, and is the mainstream process mode of aluminum wheel production. The aluminum wheel low pressure casting process is poured from the front center hole position, and the aluminum liquid is filled to the flange from the riser pipe under the action of pressure, passes through the spoke, outer rim, rim, inner rim and finally fills the whole cavity. Through mold heat absorption and external cooling, the inner rim, rim, outer rim, spoke and flange are sequentially solidified in order to ensure the solidification of the casting under the pressure provided by the center gate, and finally the qualified casting with the size, quality and performance meeting the standards is obtained. Because the aluminum wheel product modeling is variable and the thickness of each part is greatly different, the solidification sequence of the inner rim, rim, outer rim, spoke and flange cannot be completely realized, and shrinkage defects are easily produced. The shrinkage defects seriously affect the continuity and strength of the aluminum matrix of the casting, and under the condition that the aluminum matrix itself is insufficient in strength, the number and size of shrinkage defects reach a certain level, which will cause the wheel to crack and fail. The above problems affect the forming quality and production cost of the wheel and restrict the improvement of product quality. SUMMARY
[0003] The utility model provides a low pressure casting mould of using inner rim auxiliary pressure to solve the shrinkage defect problem in prior art.
[0004] To achieve the above purpose, the utility model provides the technical scheme as follows:
[0005] A low pressure casting mould of using inner rim auxiliary pressure, comprising a drag, a cope and a top die; the drag, cope and top die jointly constitute a cavity; the top die is provided with a pressurizing block at the top;
[0006] The inner side of the drag is provided with a claw air cooling device; the inner side of the cope is provided with a water channel cooling device.
[0007] Preferably, a sprue is arranged between the drag and the top die.
[0008] Preferably, the distance between the claw air cooling device and the cavity is about 10mm.
[0009] Preferably, the distance between the water channel cooling device and the cavity is about 35mm.
[0010] Preferably, the inner side of the top die is provided with an annular air pipe cooling device.
[0011] The utility model has the advantages of:
[0012] The utility model provides a kind of low-pressure casting mould of using inner rim auxiliary pressurization, pressurizing block is designed on the inner rim position of top die, realize the synchronous pressure to cavity from gate and outer rim position, so that wheel better obtains make-up, greatly improve the problem of rim, spoke shrinkage due to bad solidification sequence.
[0013] The utility model further provides active cooling design, cooperates the make-up effect caused by pressurization, realizes the synchronous solidification of casting from outer rim to rim, inner rim and from outer rim to spoke, flange, so that solidification process is completed in shorter time, improves production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0014] The drawings constituting part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:
[0015] Figure 1 It is a kind of mould assembly schematic view of low-pressure casting mould of using inner rim auxiliary pressurization. DETAILED DESCRIPTION
[0016] The utility model will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.
[0017] The following detailed description is exemplary description, and is intended to provide further detailed description of the utility model. Unless otherwise specified, all technical terms used in the utility model are the same as the meanings generally understood by the general technical personnel in the field to which the utility model belongs. The terms used in the utility model are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model.
[0018] Please refer to Figure 1 The utility model provides a kind of low-pressure casting mould of using inner rim auxiliary pressurization, including bottom die 1, side die 3 and top die 4;The bottom die 1, side die 3, top die 4 jointly constitute the cavity of mould, ensure the accurate forming of wheel 2.
[0019] The top die 4 is provided with pressurizing block 5, and the bottom die 1 and the top die 4 are provided with gate 6.
[0020] The pressing block 5 adopts air pressure transmission form, and pressure can be controlled. In the pressure maintaining and solidifying stage, the pressing block 5 moves downwards to apply pressure to the cavity. At the same time, the aluminum liquid in the sprue 6 is fed to the cavity under the action of the pressing air to apply pressure to the cavity. The pressure applied to the cavity is synchronized from the sprue and the outer rim position, and the rim and the spoke can obtain good feeding effect. In combination with the active cooling design, the casting is solidified synchronously from the outer rim to the rim, the inner rim and from the outer rim to the spoke and the flange, so that the solidification process is completed in a shorter time, the production efficiency is improved, and the strength of the casting is improved.
[0021] In an embodiment, to ensure that the spoke root 23 does not have a shrinkage defect, a claw air cooling device 11 is arranged on the inner side of the bottom die 1 to ensure the performance of the spoke; the distance between the claw air cooling device 11 and the cavity is about 10 mm.
[0022] In an embodiment, to ensure the strength of the outer rim 22, a water channel cooling device 31 is arranged on the inner side of the side die 3 to avoid slow solidification at the position and produce a shrinkage defect; the distance between the water channel cooling device 31 and the cavity is about 35 mm.
[0023] In an embodiment, to ensure the strength of the inner rim 21, an annular air pipe cooling device 41 is arranged on the inner side of the top die 4 to ensure that the rim position obtains dense organization through active cooling.
[0024] The utility model discloses a pressing block 5 for the inner rim position, which can apply pressure to the cavity synchronously from the sprue 6 and the outer rim 22 position, and the spoke and the rim position can obtain better feeding, which can greatly improve the rim and spoke shrinkage problem caused by poor solidification sequence.
[0025] The utility model discloses a pressing block 5 for the inner rim position, which can apply pressure to the cavity synchronously from the sprue 6 and the outer rim 22 position, and the spoke and the rim position can obtain better feeding, which can greatly improve the rim and spoke shrinkage problem caused by poor solidification sequence.
[0026] From the technical common sense, the utility model can realize through other's implementation scheme that does not leave its spiritual substance or essential characteristics. Therefore, the above disclosed implementation scheme is just an example in all aspects, and is not only. All changes in the range of the utility model or in the range equivalent to the utility model are included in the utility model.
[0027] It should be explained finally: the above examples are only used to illustrate the technical scheme of the utility model and not to limit it, although the utility model has been explained in detail with reference to the above examples, the ordinary skilled in the art should understand that: the specific implementation of the utility model can still be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the utility model should be covered in the protection scope of the claims of the utility model.
Claims
1. A low pressure casting mold using an inner rim auxiliary pressurization, characterized by, It comprises a bottom mould, a side mould and a top mould; the bottom mould, the side mould and the top mould jointly form a mould cavity; the top of the top mould is provided with a pressurizing block; The inner side of the bottom mould is provided with a claw air cooling device; the inner side of the side mould is provided with a water channel cooling device.
2. A low pressure casting mold using an inner rim auxiliary pressurization according to claim 1, characterized in that, A sprue is arranged between the bottom mould and the top mould.
3. A low pressure casting mold using an inner rim auxiliary pressurization according to claim 1, wherein The distance between the claw air cooling device and the mould cavity is about 10mm.
4. A low pressure casting mold using an inner rim auxiliary pressurization according to claim 1, wherein The distance between the water channel cooling device and the mould cavity is about 35mm.
5. A low pressure casting mold using an inner rim auxiliary pressurization according to claim 1, wherein The inner side of the top mould is provided with an annular air pipe cooling device.