Views: 0 Author: Site Editor Publish Time: 2026-06-24 Origin: Site
Metal Injection Molding, abbreviated as MIM, is a precision near-net-shape manufacturing process that integrates the design flexibility of plastic injection molding and the high-strength properties of powder metallurgy. It is currently the most mainstream advanced technology for mass production of tiny and intricate metal components. In recent years, it has been widely adopted to replace conventional machining, stamping and forging processes, addressing manufacturing challenges for parts featuring irregular thin walls, micro inner cavities and integrated multi-feature configurations. Jiangsu Mimo Metal has years of in-depth experience in full-process MIM production, with thorough mastery of the complete process logic. It optimizes process parameters targeting pain points in mass production of precision parts and builds stable and mature production lines for metal injection molding.
The entire MIM manufacturing workflow consists of four core procedures, each directly determining the dimensional accuracy and mechanical properties of finished products.
1. Feedstock Compounding: Ultra-fine metal powders (4–25 microns) such as stainless steel and titanium alloy are blended with dedicated thermoplastic binders under high temperature to produce injection feedstock with consistent flowability. Uniform powder distribution lays the foundation for eliminating forming defects.
2. Injection Molding: Molten feedstock is injected under high pressure into custom molds via specialized injection molding equipment, enabling one-step forming of complex structures that are difficult to machine using traditional methods, including ultra-thin walls, micro threads and irregular recesses. After demolding, the green parts feature contours highly consistent with final finished parts.
3. Debinding Treatment: Binders inside green parts are removed in a controlled manner. Heating rates are strictly regulated to prevent deformation and cracking, ensuring uniform internal porosity.
4. High-Temperature Sintering: Densification is realized at high temperature inside an atmosphere-protected furnace with controllable shrinkage. The density of finished products can reach the level of forged parts, with substantially improved strength, hardness and corrosion resistance.
Conventional powder metallurgy suffers from limitations of uniaxial compaction and demolding restrictions, resulting in simple part geometries. In contrast, MIM delivers extremely high design freedom, enabling integrated forming of multi-component assemblies and eliminating multiple assembly procedures. Its dimensional tolerance can be steadily controlled within ±0.1%~±0.3%, while critical fine features can achieve tolerance levels up to 0.01 mm. It boasts excellent consistency in mass production with a yield rate maintained above 98%. In terms of material utilization, MIM exceeds the 40%–50% utilization rate bottleneck of traditional machining and achieves a material utilization rate of over 95%, drastically cutting metal scrap loss and aligning with the cost reduction and efficiency improvement trend in precision manufacturing.
This innovative process has been extensively applied across multiple high-end sectors: hinges, camera brackets and connector terminals for 3C electronics; surgical instruments, dental components and minimally invasive implant parts for the medical industry; automotive sensors and micro gears for transmissions; joint structural components for humanoid robots, precision connecting parts for AI servers, and more. Leveraging its technological advantages in MIM, Jiangsu Mimo Metal provides one-stop services including drawing customization, mold development, small-batch prototyping and mass production, and tailors exclusive process solutions to meet diverse requirements for materials and precision.
Driven by the trend toward miniaturization and higher complexity of high-end precision components, the application scope of MIM near-net-shape forming technology keeps expanding, making it an indispensable core process for the transformation and upgrading of high-end equipment manufacturing. It holds tremendous development potential in the lightweight and miniaturization track in the future.
