Impeller Investment Casting: Material Selection, Production & Surface Treatment

Even though there are a great number of different impeller designs, there are primarily four sorts that are utilized in engineering mixers. When it comes to the choice of material for impeller mixers, stainless steel is the material that is utilized most frequently. mainly because castings made of stainless steel have excellent resistance to corrosion. It has the potential to reduce the amount of pollution caused by the production of materials. Particularly those surfaces that are in direct contact with fluids. Examples of such businesses include the food, dairy, beverage, and pharmaceutical sectors. The demand is driven by areas with a smooth surface. In most cases, we go with a mixing impeller made of 316L stainless steel or higher-grade cast metal. After that, either passivation, electropolishing, or mirror polishing will take place.

Stainless steel is the material of choice for the stirring impeller because of its cheap cost of maintenance, ease of cleaning, resistance to corrosion, and compatibility with the majority of chemical reactions. There are a variety of grades of stainless steel, some of which may be appropriate for the use you have in mind. In applications involving acids or other extreme conditions that are not appropriate for metals to be exposed to, a PTFE-coated stainless steel impeller is another typical impeller material. This substance is also known as Teflon. For extremely specialized applications, alternative materials, such as glass or different metal alloys, may also be used.

There is a wide variety of forms and constructions available, depending on the kind of mixing impeller. This will result in distinct variations in production procedures. Our foundry is able to create stainless steel mixer impellers by the investment casting method in order to fulfill a wide variety of mixing impeller requirements. After the wax in the shell has melted, we pour the liquid metal into the shell until it is completely filled. Make the impeller once the temperature has cooled. Investment casting ensured that the surface of the mixing impeller was in good condition. This results in a reduction or elimination of secondary processing, which saves time and money.

Post-processing is typically something that we do in order to achieve lighter or more surface-focused effects. On the surface of the mixing impeller cast from stainless steel, we have the option of doing a mechanical treatment, a chemical treatment, or an electric polishing. Chemical treatment has the ability to eliminate the scale and discoloration that have formed on the surface as a result of heat treatment. Electrolytic polishing not only has the benefit of being multi-purpose, but it also satisfies requirements for high purity. On the other hand, it has an extremely smooth appearance and is simple to passivate.

We are a leading professional casting manufacturer in China, offering a wide range of casting services such as investment casting, injection molding, and die casting, amongst others. One of our most significant competitive advantages is individualized casting. Samples or designs provided by customers serve as the basis for our company’s ability to tailor the mixing impeller and other casting parts and CNC food parts.

Please get in touch with us if you have any projects related to the food sector. Our technicians and engineers will present you with the most effective strategies and options for your application.