Views: 0 Author: Site Editor Publish Time: 2026-07-21 Origin: Site
Smartwatches, TWS earbuds and AR glasses have become daily wearable gadgets. Consumers are shifting their focus from stacked functions to lightweight wearing experience, refined appearance and long service life. However, as wearables grow smaller and more integrated with functions, their internal structures become increasingly complex. Traditional machining, die casting and conventional powder metallurgy are incapable of fabricating special-shaped thin-walled structures—they either fail to meet precision standards or produce rough textures, severely restricting product iteration. Metal Injection Molding (MIM) perfectly fills this gap and has become a pivotal manufacturing process that differentiates premium wearable products from ordinary ones.
Lightweight Design: Pushing the Limits of Ultra-Thin Walls
As a near-net-shape forming technology, MIM produces parts with dimensions nearly identical to finished products and achieves a material utilization rate of up to 99%. Ultra-thin wall structures ranging from 0.3 mm to 0.8 mm can be integrally formed in a single step, fundamentally reducing component weight. MIM is widely adopted to manufacture smartwatch cases and strap connectors, TWS earbud fixing brackets, and AR glass hinge structures. The substantial weight reduction enables truly imperceptible all-day wear.
Ultra-High Precision: Enabling Micron-Level Assembly
Wearable devices are packed with dozens of miniature components including sensors, chips and batteries; any dimensional deviation will compromise overall device stability. MIM leverages automated precision mold forming to control part tolerances within ±0.03 mm, delivering exceptional consistency across production batches. For sophisticated components such as AR glass hinge spindles, waterproof miniature buttons and signal connectors, MIM can directly form integrated complex features like hollow cutouts, micro-holes and irregular curved surfaces, simplifying assembly workflows while boosting sealing performance and structural reliability.
Wide Material Compatibility: Balancing Premium Texture and Durability
MIM readily processes skin-friendly high-hardness materials such as 316L stainless steel, titanium alloy and 17-4PH alloy. Formed MIM parts reach a density of 95%–99%, with mechanical properties comparable to forged components, offering excellent drop resistance, wear resistance and oxidation resistance. Titanium watch cases for flagship smartwatches, internal metal structural parts of TWS earbuds, and precision hinge assemblies for AR glasses all rely on MIM to combine slim, robust construction with delicate metallic finish.
Cost Reduction & Production Efficiency: Resolving Mass Production Bottlenecks
Traditional cutting processes for precision metal parts involve cumbersome procedures, unstable yield rates and high mass production costs. MIM adopts fully automated one-step forming, eliminating extensive secondary machining. In large-volume manufacturing, it consistently delivers precise, high-quality parts while lowering per-unit costs, addressing the pain point that premium wearable hardware is difficult to produce at scale.
