Views: 0 Author: Site Editor Publish Time: 2026-04-13 Origin: Site
As humanoid robots accelerate into the industrialization window, their demand for miniaturized, high-precision, and high-strength core components has become increasingly stringent. With its unique advantages, Metal Injection Molding (MIM) has emerged as a critical enabler for solving mass-production challenges and driving technology implementation. The deep integration of the two is reshaping the landscape of high-end manufacturing.
The flexible operation of humanoid robots relies on a large number of precision metal components — from joint gears and tendon connectors in dexterous hands to miniature motor structural parts. All must achieve high load-bearing capacity, fatigue resistance, and high precision within an extremely compact volume, a balance that traditional manufacturing processes struggle to deliver. Conventional CNC machining suffers from low material utilization and high costs, making it unsuitable for mass-producing complex 3D structures. Precision casting is limited by material flowability and fails to meet the accuracy standards for miniature parts. MIM technology precisely compensates for these shortcomings.
A near-net-shape process combining plastic injection molding and powder metallurgy, Metal Injection Molding forms complex 3D components in one step by mixing metal powder with an organic binder to create feedstock, followed by injection, debinding, and sintering — perfectly matching the manufacturing requirements of humanoid robot parts. It boasts a material utilization rate of over 95%, drastically reducing scrap compared with traditional processes. After sintering, part density reaches 96%–99.5% of theoretical density, with mechanical properties close to forged parts, satisfying the strength demands of load-bearing components such as robot joints.
MIM’s advantages have become increasingly prominent in the mass production of humanoid robots. Leading models including Tesla Optimus and Figure AI have extensively adopted MIM parts, achieving over 30% weight reduction and precision tolerances as tight as 0.01 mm. Fe-Ni-Mo-Cu alloy gears used in their joints are mass-produced via MIM, cutting costs by 20%–30% compared with traditional CNC machining. Furthermore, MIM is compatible with various metals such as stainless steel and titanium alloys, allowing customized components for different robot sections and enabling the lightweight and dexterous design of humanoid robots.
The explosive growth of the humanoid robot industry is driving rapid upgrades in MIM technology. Chinese enterprises are actively stepping into this sector, optimizing MIM processes, lowering production costs, and expanding application scenarios from joint components to core parts such as sensor housings and reducer assemblies. As MIM matures, it will not only address key pain points in humanoid robot mass production but also propel robots toward greater precision, efficiency, and cost-effectiveness.
Their deep integration represents both a major opportunity for MIM to expand high-end applications and a critical pathway for humanoid robots to break through industrialization bottlenecks. Going forward, with the collaborative innovation of materials science and manufacturing engineering, Metal Injection Molding will continue to empower the humanoid robot industry, helping it move from the laboratory into daily life and opening a new chapter in high-end manufacturing.
