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Information about Investment Casting

Views: 327     Author: Site Editor     Publish Time: 2022-04-27      Origin: Site


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The surface of the wax mold is covered with a layer of refractory ceramic material. Once the ceramic material hardens, the desired casting geometry is formed inside it, and then the wax is melted and exported, and the cavity is filled with molten metal. After the metal solidifies in the ceramic mold and takes out the metal casting, this manufacturing technique is also known as the lost wax process. Next, let's learn about the following investment casting-related information.

Here is the content list:

l The tasks and importance of the Investment Casting process design

l Investment Casting defects and prevention methods

l Extended Application of Investment Casting Investment Casting Die Casting with Zinc/Aluminum

The tasks and importance of the Investment Casting process design:

Investment casting is a casting process with less or no cutting. It was also called lost wax casting in the past. Because the castings produced by the investment casting process are better than other casting methods in terms of dimensional accuracy and surface quality, castings are higher. In addition, investment casting can complete the production of castings with high complexity and difficult processing, so it is deeply loved by enterprises.

Regarding the investment casting process, in the entire investment casting process, the investment casting process design is one of the most important links. This link has a large technical difficulty factor and plays a very important role in the entire investment casting process.

Investment Casting defects and prevention methods

The defects of Investment Casting are divided into surface and internal defects and out-of-tolerance size and roughness. Surface and internal defects refer to under-casting, cold insulation, shrinkage, pores, slag inclusion, thermal cracking, cold cracking, etc.; size and roughness out of tolerance mainly include elongation and deformation of castings. And the surface and internal defects are mainly related to the pouring temperature of the alloy liquid, the baking temperature of the shell and the preparation process, the design of the pouring system and the casting structure, and other factors. The main reason why the casting size and roughness are out of tolerance is that the design of the die is related to the wear and tear, the structure of the casting, the roasting and strength of the shell, and the cleaning of the casting. For example, when the investment casting is under-cast, the reason may be that the low pouring temperature and the mold shell temperature reduce the fluidity of the molten metal, the casting wall is too thin, the design of the gating system is unreasonable, the shell baking is not sufficient or the air permeability is poor, pouring. If the speed is too slow and the pouring time is insufficient, at this time, the problem should be solved in a targeted manner and the defects should be eliminated according to the specific structure of the casting and the related processes involved.

Extended Application of Investment Casting Investment Casting Die Casting with Zinc/Aluminum

Zinc/Aluminum parts obtained by investment casting are called Investment Casting Die Casting with Zinc/Aluminum. Casting aluminum alloy refers to the aluminum alloy used in sand casting and special casting other than pressure casting, such as metal mold gravity casting, low-pressure casting, lost foam casting, negative pressure casting, vacuum suction casting, etc. Since most die casting molds are made of heat the mold steel is used to make the forming core. In addition to spraying water-based or oil-based mold release agents, the mold surface is not treated with other coatings on the surface during production. However, the affinity between aluminum alloy and steel is extremely strong at high temperatures, and it is easy to adhere to the mold. Therefore, the Fe content of most die-casting aluminum alloys is relatively high, to reduce the affinity between the aluminum alloy and the mold surface. Even if the casting alloy uses a steel mold, the mold surface is sprayed with a layer of other thermal insulation, wear-resistant, and easy-to-release molds. Therefore, the content of Fe, an impurity, is required below, to improve the performance of the casting.

With the development of mechanical and electrical product parts in the direction of thin walls, complex and lightweight, aluminum alloy precision casting technology has received great attention. Castings produced by Investment Casting have higher dimensional accuracy and surface quality than other casting methods and have broad application prospects. The above is the relevant information on investment casting. If you are interested in investment casting, you can log in to our company's website to view it. We welcome your arrival and look forward to having the opportunity to cooperate with you.

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