Group shares today what are the key considerations for metal injection molding

Key precautions and detailed instructions for metal injection molding

Material selection and feeding quality control: The particle size (usually 1-20 μ m fine powder), morphology, and purity of metal powder directly affect the sintering density and feeding flowability; The formula of the adhesive (thermoplastic resin, wax, etc.) needs to match the powder characteristics to ensure the bonding and molding effect. The mixing process requires temperature and speed control to ensure uniform feeding composition and stable rheological properties. At the same time, indicators such as feeding uniformity and viscosity need to be tested.

Optimization of process parameters

Injection molding: It is necessary to adjust the temperature of the material barrel, injection pressure (50-200MPa), holding time, etc. according to the feeding characteristics to avoid material shortage and flash of the green body;

Degreasing: Using a combination of solvent degreasing, thermal degreasing, and other methods, strictly controlling the temperature curve and atmosphere to prevent cracking and deformation of the green body;

Sintering: Precisely set the temperature (metal melting point 80% -90%), heating rate, holding time, and atmosphere (hydrogen, vacuum, etc.) to avoid sintering deformation or insufficient density.

The size accuracy control sintering has a volume shrinkage of 10% -25%, which needs to be compensated by enlarging the size according to the shrinkage rate during mold design; Regular maintenance and calibration of molds during production, combined with fine-tuning of process parameters, ensure that the final part size accuracy reaches IT8-IT10 levels.

Establish a full process inspection system for quality testing: inspect the appearance and density of the green body; Detection of residual binder content in defatted blanks; Detect the density (relative density ≥ 95%), hardness, strength, and dimensional accuracy of sintered parts, and promptly identify defects.

The harmful gases generated by environmental protection and safety degreasing need to be purified by the exhaust gas treatment system; High temperature operations in sintering furnaces require proper safety protection measures; Collect metal dust during the production process to avoid environmental pollution and personnel health risks.

Powder metallurgy, metal injection molding, powder metallurgy gears

Guangming Group focuses on the research and development of metal forming technology and wear-resistant materials. Its main products include metal compression molding and injection molding powder metallurgy products. The company has a team of high-quality talents, with the founding team originating from the Guangzhou Nonferrous Metals Research Institute, a directly affiliated national and ministerial level scientific research institution. It has rich industry experience and research and development capabilities, providing a continuous source of innovation power for the company's development. The company has successively obtained 5 invention patents and more than 30 utility model patents. It has passed the IATF16949 quality management system, ISO9001-2015 quality management system, ISO14001 environmental management system, intellectual property management system, and obtained international trademark certification. It is an innovative enterprise in Guangdong Province, a small giant enterprise in science and technology in Guangzhou, a member of the Guangdong Powder Metallurgy Industry Technology Innovation Alliance, and an initiator of the Guangzhou Advanced Powder Metallurgy Cluster Promotion Center.