In the field of modern industrial manufacturing, ceramic powder injection molding technology (CIM) is becoming a key process for producing high-precision, complex-shaped ceramic parts with its unique advantages. This technology gives new vitality to traditional ceramics by mixing ceramic powder with polymer additives, allowing it to manufacture various precision ceramic products at one time through injection molding.
Properties of ceramic materials Ceramic materials, such as alumina (Al2O3), silicon dioxide (SiO2) and zirconia (ZrO2), are known for their exceptional hardness, wear resistance and high temperature resistance. The chemical bonds of these materials are mainly ionic and covalent bonds, giving them extremely high hardness and compressive strength. However, their tensile strength and flexural strength are relatively low, and their plasticity and toughness are poor, which makes traditional ceramic processing methods challenging. China's ceramic powder raw materials have made significant progress in the past decade, and their performance has become equivalent to the international advanced level. Especially driven by the development of 5G communication technology, domestic ceramic materials have broad application prospects.
Ceramic powder injection molding process The CIM process includes several key steps: binder selection, compound granulation, injection molding, degreasing and sintering. Each step has a decisive impact on the quality of the final product.
Selection of binder: The function of the binder is to reduce the viscosity of the powder during the injection molding stage, improve fluidity, and maintain the shape of the embryo after molding. Choosing the right adhesive is crucial to ensuring product quality. Colloidal particle preparation: This step involves mixing ceramic powder and binder to prepare granular raw materials suitable for injection molding. The performance of the mixture directly affects the subsequent injection, degreasing and sintering processes. Injection molding: Injection molding is a key link in the CIM process, which requires precise control of injection pressure, speed and temperature to ensure the quality of the green embryo. Defatting: Defatting is the process of removing organic matter from the green embryo. This step is crucial to the quality of the final product. Degreasing methods include thermal degreasing, solvent extraction degreasing, etc. Sintering: Sintering is the process of densifying the embryo body. It eliminates pores through high temperature and improves the strength and density of the embryo body.
