The impeller is an integral part of the mixer and provides flow. Agitator impellers, also known as agitator blades, are designed and built to transfer motor-driven energy to the contents of the tank as quickly and efficiently as possible. There are four main types of mixing impellers, and each mixing impeller type converts the energy to it differently:
Airfoil: Usually the most efficient as it produces the greatest pumping with the lowest shear.
Pitch Blades: For viscous mixtures and applications requiring combined pumping and shearing.
Radial Blades: For applications where shear is the primary requirement or agitation near the bottom of the tank is required.
Marine Propellers: Ideal for low viscosity, high speed direct drive mixers.
Stainless steel casting stirring impeller
Stainless steel alloys are widely used as materials for agitating impellers and have excellent corrosion resistance, thus minimizing contamination of the material being processed. The focus on purity in the food, dairy, beverage and pharmaceutical industries is reflected in the need for smooth surfaces, especially those that come into contact with the fluids used.

So how is the stainless steel mixing impeller made? From the types of mixing impellers, we can see that there are many different shapes, and the structure of each is different. In order to meet the various needs of the stirring impeller, the stainless steel lost wax casting method, also known as the stainless steel investment casting method, is often used to manufacture the stirring impeller.

  Stainless steel casting for stirring impeller is a lost wax precision casting process, which is to pour liquid metal into the shell after melting the wax in the shell. Through investment casting, our customers can obtain a net shape mixing impeller with a good surface finish, reducing or saving secondary operations. In addition, in order to obtain a bright or more surface effect, the surface of the stirring impeller after stainless steel casting can be mechanically or chemically treated or electrolytically polished. Surface scale and discoloration that appear after heat treatment can be removed by chemical treatment. For high purity requirements, electropolishing not only has the advantage of versatility, but also provides a very smooth surface that is easy to passivate.