Anti-crack steering knuckle casting mold
Patent Information
- Application Number
- CN202522351847.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-06
AI Technical Summary
[0003]针对现有技术存在的不足，本实用新型目的是设计一种防型裂的车用转向节浇注模具，用以解决背景技术中提及的现有浇注模具无法有效的解决铸件出现型裂的情况，减少浇铸成型的转向节出现型裂缺陷，提高产品的合格率，保证产品质量，同时降低生产成本，提高产品的核心竞争力
[0010]本实用新型的有益效果是：浇口杯偏置，不再采用直冲式浇注方法，减小铁水浇注速度及压力，从而使得进入铸件型腔内部的铁水温度与冒口和浇口杯三处热节温度不一致，不能连成一线形成热裂，保证转向节的质量，大大提高转向节的安全性能。
Smart Images
Figure CN224879280U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive steering knuckle casting technology, specifically relating to an anti-cracking automotive steering knuckle casting mold. Background Technology
[0002] In modern society, with automobiles serving as a means of transportation and various forms of transport, all automotive components need to meet high safety standards. This is especially true during operation, as braking and steering often carry higher safety risks. From a technological upgrade perspective, the safety performance of traditional thin-arm steering knuckles needs further improvement. The safety performance requirements for each part of the steering knuckle are being continuously increased during the casting process. The steering knuckle is responsible for the steering performance of the vehicle during operation, requiring accurate, safe, and reliable stability, while also ensuring the safety and stability of the vehicle during transportation. The steering knuckle occupies a crucial part of the automotive braking and steering system, primarily bearing the responsibility for the vehicle's stable and safe steering function. Due to functional requirements, the steering knuckle bears greater forces, making it heavier and subject to increased strain, thus necessitating superior safety performance. Conventional process layouts cannot effectively address the issue of mold cracking in castings. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to design a mold for preventing mold cracking in automotive steering knuckles. This invention aims to solve the problem mentioned in the background art that existing casting molds cannot effectively prevent mold cracking in castings, reduce mold cracking defects in cast steering knuckles, improve product qualification rate, ensure product quality, reduce production costs, and enhance the core competitiveness of the product.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a casting mold for preventing cracking of automotive steering knuckles, comprising a sprue cup, an inclined horizontal runner, a vertical runner, an overlapping runner, a top riser, a filter screen, a bottom riser, and a cavity. The sprue cup is located on the side of the upper center of the casting mold. The lower outlet of the sprue cup is connected to the inclined horizontal runner. The outlet of the inclined horizontal runner is connected to the top of the vertical runner. The lower outlet of the vertical runner is connected to the bottom riser after passing through the filter screen. The lower outlet of the bottom riser is connected to the cavity. The middle of the vertical runner is connected to the overlapping runner, which is connected to the middle of the top riser. The lower part of the top riser is connected to the cavity.
[0005] The pouring cup is positioned on the side of the middle section to prevent excessively fast pouring speeds during direct injection, thus minimizing temperature loss. The riser hot spot is connected to the pouring cup to prevent thermal cracking.
[0006] The inclined horizontal pouring channel is a sheet-like flow channel, which has the effect of avoiding slag. There is an arc-shaped transition at the bend inside the flow channel to ensure the flow rate of molten iron.
[0007] The filter screen is installed at the bottom of the vertical runner to further prevent slag from forming and avoid slag holes in the casting.
[0008] The overlapping gating system is inclined upwards at the connection point with the vertical gating system to slow down the flow rate of molten iron. The overlapping gating system also facilitates demolding after processing.
[0009] The number of overlapping gating channels, top risers, and cavities are all two, and they are symmetrically distributed on the left and right sides with the vertical gating channel as the center line.
[0010] The beneficial effects of this utility model are: the pouring cup is offset, and the direct pouring method is no longer used, which reduces the pouring speed and pressure of molten iron. As a result, the temperature of the molten iron entering the casting cavity is inconsistent with the temperature of the three hot spots of the riser and the pouring cup, so that they cannot be connected in a line to form hot cracks, thus ensuring the quality of the steering knuckle and greatly improving the safety performance of the steering knuckle. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the casting mold structure of this utility model.
[0012] In the diagram: 1. Sprue cup, 2. Angled horizontal runner, 3. Vertical runner, 4. Overlapping runner, 5. Top riser, 6. Cavity, 7. Filter screen, 8. Bottom riser. Detailed Implementation
[0013] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0014] Please see Figure 1A casting mold for automotive steering knuckles designed to prevent cracking includes a sprue cup 1, an inclined horizontal runner 2, a vertical runner 3, an overlapping runner 4, a top riser 5, a filter screen 7, a bottom riser 8, and a cavity 6. The sprue cup 1 is located on the side of the upper center of the casting mold. The lower outlet of the sprue cup 1 is connected to the inclined horizontal runner 2. The outlet of the inclined horizontal runner 2 is connected to the top of the vertical runner 3. The lower outlet of the vertical runner 3, after passing through the filter screen 7, connects to the bottom riser 8. The lower outlet of the bottom riser 8 connects to the cavity 6. The overlapping runner 4 is connected to the middle of the vertical runner 3, and the overlapping runner 4 connects to the middle of the top riser 5. The lower part of the top riser 5 is connected to the cavity 6. The sprue cup 1 is positioned on the side of the middle to prevent excessively fast pouring speeds during direct injection, minimizing temperature loss and preventing thermal cracking caused by the riser's hot spot connecting to the sprue cup 1. The inclined horizontal pouring channel 2 is a sheet-like flow channel with the effect of slag avoidance. There is an arc-shaped transition at the bend inside the flow channel to ensure the flow rate of molten iron.
[0015] The filter screen 7 is installed at the lower part of the vertical sprue 3 to further prevent slag from forming slag holes in the casting. The overlapping sprue 4 is inclined upward at the connection with the vertical sprue 3 to slow down the flow rate of molten iron. The overlapping sprue 4 also facilitates demolding after processing.
[0016] The number of overlapping gating 4, top riser 5 and cavity 6 are all two, and they are symmetrically distributed on the left and right sides with the vertical gating 3 as the center line.
[0017] During the use of this utility model: First, molten iron is added from the pouring cup 1, flows through the inclined horizontal sprue 2 into the vertical sprue 3, and then the molten iron is divided into three paths. Two of them pass through the overlapping sprue 4 and enter the top risers 5 on both sides, and then enter the mold cavities 6 on both sides. One path passes through the filter screen pad 7 and enters the bottom riser 8, and then splits into two paths to enter the mold cavities 6 on both sides. By offsetting the pouring cup 1, the pouring speed and pressure are slowed down, allowing the riser and pouring cup 1 of the casting to cool and solidify successively. This solves the mold cracking defect, improves the yield of the casting, reduces the production cost of the casting, enhances the core competitiveness of the product, and lays a solid foundation for the production of high-quality steering knuckles.
[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0019] The parts of this utility model not described in detail are existing technologies.
Claims
1. A mold for preventing cracking of automotive steering knuckles, comprising a pouring cup (1), an inclined horizontal runner (2), a vertical runner (3), an overlapping runner (4), a top riser (5), a filter screen (7), a bottom riser (8), and a cavity (6), characterized in that: A sprue cup (1) is provided on the side of the upper center of the casting mold. The lower outlet of the sprue cup (1) is connected to an inclined horizontal sprue (2). The outlet of the inclined horizontal sprue (2) is connected to the top of the vertical sprue (3). The lower outlet of the vertical sprue (3) is connected to the bottom riser (8) after passing through the filter screen (7). The lower outlet of the bottom riser (8) is connected to the cavity (6). The middle part of the vertical sprue (3) is connected to an overlapping sprue (4). The overlapping sprue (4) is connected to the middle part of the top riser (5). The lower part of the top riser (5) is connected to the cavity (6).
2. The anti-cracking casting mold for automotive steering knuckles according to claim 1, characterized in that: The pouring cup (1) is set on the side of the middle part to avoid the pouring speed of the direct pouring being too fast, so as to reduce the temperature loss. The riser hot spot is connected to the pouring cup (1) to form a thermal crack.
3. The anti-cracking casting mold for automotive steering knuckles according to claim 1, characterized in that: The inclined horizontal pouring channel (2) is a sheet-like flow channel with the effect of slag avoidance. There is an arc-shaped transition at the bend inside the flow channel to ensure the flow rate of molten iron.
4. The anti-cracking casting mold for automotive steering knuckles according to claim 1, characterized in that: The filter screen (7) is set at the lower part of the vertical sprue (3) to further avoid slag and prevent slag holes from forming in the casting.
5. A casting mold for preventing cracking of automotive steering knuckles according to claim 1, characterized in that: The overlapping gating channel (4) and the vertical gating channel (3) are connected by an upward inclination to slow down the flow rate of molten iron. The overlapping gating channel (4) also facilitates demolding after processing.
6. A casting mold for preventing cracking of automotive steering knuckles according to claim 1, characterized in that: The number of overlapping gating (4), top riser (5) and cavity (6) are all two, and they are symmetrically distributed on the left and right sides with the vertical gating (3) as the center line.