LONGYI specializes in Powder Injection Molding (PIM) technology, particularly in the field of Ceramic Injection Molding (CIM). This is an efficient and precise molding technique, suitable for large-scale production of ceramic parts with high dimensional accuracy and complex shapes.
Overview of CIM Technology
Ceramic Injection Molding (CIM) is an innovative technology that combines polymer injection molding with ceramic processes. It offers high automation, fast production, and stable product quality, making it particularly suitable for manufacturing small ceramic parts with complex shapes. Compared to traditional dry pressing methods, CIM technology can achieve near-net-shape molding, reducing the need for subsequent processing and effectively saving costs.
Advantages and Challenges of CIM Technology
Advantages:
– High automation, efficiency, and short molding cycles
– Products have excellent appearance and high dimensional accuracy
– Suitable for small ceramic parts with complex geometries, reducing post-processing needs and lowering production costs
Applications of CIM
CIM technology is widely used in biomedical, optical communication, semiconductor, electronics, consumer goods, and aerospace industries. Examples include dental instruments, fiber optic connectors, insulating ceramic components, and ceramic watch casings.
Ceramic Materials Suitable for CIM
CIM is compatible with a variety of ceramic materials, including alumina, zirconia, silicon nitride, and silicon carbide. Each of these materials has its own unique physical and chemical properties, making them suitable for different applications.
Post-Sintering Finishing, Metallization, and Brazing Services
After sintering, ceramic products can undergo precision finishing to achieve higher dimensional accuracy and surface smoothness.
Metallization treatment can coat the ceramic surface with a metal layer, which is useful for applications requiring electrical conductivity or bonding with other metal components.
Brazing is a method used to join ceramic parts with other metal or ceramic components, typically carried out at high temperatures to ensure a strong and durable bond.
Challenges:
– High equipment investment, making it more suitable for mass production
Key Points in Evaluating the CIM Process
1. Raw Materials
The mixture of powder and binder must have good flowability. Selecting the appropriate binder and ceramic powder is crucial as it affects the smoothness of the subsequent processes.
2. Injection Molding and Mold Design
Improper injection control can result in defects such as cracks or pores. The mold design in CIM must precisely control material flow. Factors like gate location, runner length, and vent design need to be considered to improve yield.
3. Debinding
Debinding is the process of removing organic materials from the molded body, which is critical for the subsequent sintering process. Common debinding methods include thermal debinding, solvent debinding, and catalytic debinding.
4. Sintering
The sintering process densifies the ceramic body after debinding, forming the final shape and size of the ceramic product. The shrinkage rate during sintering is about 13-15%.