One-mold two-casting hub casting mold

Abstract

The utility model relates to the technical field of hub casting, in particular to a one-mold two-casting hub casting mold which comprises a hub casting mold body, the hub casting mold body comprises a casting ladle, a pouring cup arranged at the lower end of the casting ladle, a left pouring gate located on the left side of the pouring cup, and a right pouring gate located on the right side of the pouring cup. The casting mold for the hub castings has the advantages that the casting mold for the hub castings is low in production cost, simple in process and high in production efficiency; the process is high in product yield and product percent of pass, convenient to store, good in casting performance, good in casting surface quality and size precision, low in investment cost and high in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub casting, in particular to a one-type two-cast wheel hub casting mould. Background Art

[0002] The wheel hub is part of the automobile brake system. It must have a certain strength and rigidity, and no sand is allowed to stick to the surface, and no defects such as pores, shrinkage and shrinkage are allowed inside to achieve a certain service life. When ordinary sand casting is used, it is difficult to solve various casting defects such as sand inclusion, expansion box, pores, shrinkage and shrinkage. The product qualification rate is only about 70%, resulting in high production costs. The use of one-mold two-cast wheel hub shell casting sand shell technology to produce wheel hubs can not only obtain excellent casting quality, but also save materials, energy and reduce production costs. Utility Model Content

[0003] The technical problems to be solved by the utility model are various casting defects such as sand inclusion, box expansion, air holes, shrinkage holes, shrinkage and porosity;

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a one-type two-cast wheel hub casting mold, including a wheel hub casting casting mold, the wheel hub casting casting mold includes a ladle, a pouring cup arranged at the lower end of the ladle, a left runner is provided on the left side of the pouring cup, and a right runner is provided on the right side thereof, and a sand shell cavity is provided in the wheel hub casting casting mold.

[0005] As an improvement, the left runner and the right runner are arranged in a transverse structure.

[0006] As an improvement, the wheel hub casting casting mold uses high-strength low-gas-generating coated sand.

[0007] Compared with the prior art, the utility model has the advantages of low production cost, simple process and high production efficiency; high production rate and product qualification rate, convenient storage, good casting performance, good surface quality and dimensional accuracy of castings, low investment cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic diagram of a one-type two-cast wheel hub casting mold.

[0009] Figure 2 The utility model is a structural schematic diagram of a one-type two-cast wheel hub casting mold.

[0010] Figure 3 The utility model is a schematic diagram of the principle of a one-type two-cast wheel hub casting mold.

[0011] As shown in the figure: 1. Ladle; 2. Pouring cup; 3. Left pouring channel; 4. Right pouring channel; 5. Sand shell cavity; DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] The present application fully explains the problems of the prior art in the technical background, and there are no superordinate or general problems. The problems to be solved by the present application are described in detail in the following utility model content and specific implementation methods, the technical problems to be solved by the technical scheme are clarified, and it is determined that the technical scheme of the present application has beneficial effects relative to the objective prior art.

[0014] See also Figure 1-Figure 3 , an embodiment provided by the utility model:

[0015] Wheel hub casting mold

[0016] A one-type two-cast wheel hub casting mold includes a wheel hub casting casting mold. The wheel hub casting casting mold uses high-strength low-gassing coated sand. The wheel hub casting casting mold includes a ladle 1, a pouring cup 2 arranged at the lower end of the ladle 1, a left runner 3 is provided on the left side of the pouring cup 2, and a right runner 4 is provided on the right side thereof. The left runner 3 and the right runner 4 are arranged in a transverse structure, and a sand shell cavity 5 is provided in the wheel hub casting casting mold.

[0017] The present invention adopts a one-mold two-cast hub shell casting production process to solve many problems that occur in ordinary casting. Specifically, combined with the attached Figure 3 The molten iron is poured from the ladle 1 into the pouring cup 2, enters the left runner 3 and the right runner 4 through the pouring cup, and flows into the two sand shell mold cavities respectively.

[0018] In actual use, the above structure

[0019] 1. According to the principle of balanced solidification of molten iron, the molten iron is introduced from the upper flange surface, and the side injection one mold two casting process is selected.

[0020] 2. The molten iron enters from the thin wall of the casting, and the inner gate ( Figure 2 3) The sealing is completed before the casting solidifies, and the casting completely relies on graphitization expansion to compensate for shrinkage, achieving riser-free casting.

[0021] 3. In the design of the pouring system, a larger horizontal runner is selected ( Figure 22) The slag inclusions in the molten iron have sufficient floating space, which plays a good slag blocking role and also meets the necessary liquid shrinkage of the casting.

[0022] 4. Smaller ingates ( Figure 2 The design in (3) can make it closed before the graphitization expansion of the molten iron begins, preventing the molten iron from flowing back and making full use of the self-compensation shrinkage.

[0023] 5. The one-type two-cast wheel hub shell casting sand shell adopts high-strength low-gas coating sand. The coating sand has the following characteristics: high temperature resistance, high strength, low expansion, low gas generation, slow gas generation, easy disintegration, and anti-oxidation. It can effectively eliminate casting defects such as sand sticking, deformation, thermal cracking and pores.

[0024] The following advantages are achieved:

[0025] 1. Low production cost: The production process only requires coated sand and release agent. The focus of energy consumption is the electricity consumption of the heating tube. Under the condition of continuous and stable production, the cost per ton of casting is very low.

[0026] 2. Simple process and high production efficiency: The shell casting sand shell process uses low-pressure gas to blow the coated sand into the mold cavity, heats and hardens it with an electric heating tube, and demolds it into a shell. After assembly, it can be poured, which greatly shortens the production cycle. The per capita output is high and the production efficiency is high. Workers who do not need professional skills can easily operate it.

[0027] 3. High process yield and product qualification rate: The shell casting sand shell process has a high iron-sand ratio, close to 1:1, saving a lot of sand. The one-mold two-cast process is adopted, and the process yield rate can reach about 85%; the one-mold two-cast wheel shell casting process is simple. As long as the mold structure is reasonable and the pouring speed is reasonable, qualified castings can be obtained, and the product qualification rate is high.

[0028] 4. Easy to store: The prepared sand shell can be stored for a long time and is rarely affected in high temperature and high humidity environments.

[0029] 5. Good casting performance: The casting is cooled by steel shot, the cooling speed is fast, the casting has high strength and good wear resistance.

[0030] 6. The surface quality and dimensional accuracy of the casting are good: the surface roughness Ra value of the casting is in the range of 6.3 to 12.5um, and the dimensional accuracy can reach CT7 to CT8 level.

[0031] 7. Low investment cost and high efficiency: small equipment investment, only core shooting machine and mold need to be invested; small footprint, convenient production and high production efficiency.

[0032] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0033] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A one-type two-cast wheel hub casting mold, including a wheel hub casting mold, characterized in that: The wheel hub casting mold comprises a ladle (1), a pouring cup (2) arranged at the lower end of the ladle (1), a left runner (3) arranged on the left side of the pouring cup (2), and a right runner (4) arranged on the right side thereof, and a sand shell cavity (5) is arranged in the wheel hub casting mold.

2. The one-type two-cast wheel hub casting mold according to claim 1, characterized in that: The left runner (3) and the right runner (4) are arranged in a transverse structure.

3. The one-type two-cast wheel hub casting mold according to claim 1, characterized in that: The hub casting casting mold adopts high-strength low-gas-generating coated sand.

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