MIM Injection Molded Smart Watch Case

This product is a Metal Injection Molding (MIM) smart watch case, a core structural component of smart wearable devices. MIM combines the shape freedom of plastic injection molding with the material versatility of powder metallurgy, enabling one-piece forming of complex 3D structures difficult to machine, such as irregular curved surfaces, fine slots, button holes, and sensor windows. For smart watch cases with small size, complex shapes, and high appearance requirements, MIM is the optimal choice.

We use medical-grade 316L or 17-4PH precipitation-hardening stainless steel powder, through precision mixing, injection molding, catalytic debinding, vacuum sintering, heat treatment, polishing, sandblasting, and PVD coating. Density reaches 7.6-7.9 g/cm³, tensile strength ≥500 MPa (316L) or ≥1100 MPa (17-4PH after heat treatment), hardness HRC 20-45 adjustable. Surface roughness Ra ≤0.8μm, up to Ra 0.2μm after polishing. Excellent corrosion resistance, compliant with ISO 10993 biocompatibility, suitable for long-term skin contact. All production is in clean workshops to ensure cleanliness.

Product Parameter (Specification)

Product Feature And Application

Medical-Grade Material: 316L/17-4PH stainless steel, corrosion-resistant, biocompatible per ISO 10993, suitable for skin contact

High Density & Strength: Density ≥7.6 g/cm³, tensile strength up to 1100 MPa

Complex Structure in One Piece: Irregular curved surfaces, slots, button holes, sensor windows formed in one injection, reducing machining

Ultra-High Precision: Dimensional tolerance ±0.01mm, meeting precision smart wearable assembly

Premium Appearance: Mirror polishing, sandblasting, brushing, PVD gold/rose gold/black, etc., for high-end aesthetics

Cost Advantage in Mass Production: Unit cost much lower than CNC machining

Clean Production: Cleanroom to ensure product cleanliness

FAQ

Q1Are you a trading company or a manufacturer?

A1We are a manufacturer with our own R&D center and production base in Nansha, Guangzhou. We specialize in powder metallurgy (PM) and metal injection molding (MIM) components.

Q2What relevant qualifications and certificates do you have?

Q2We hold IATF 16949:2016 for automotive quality management, ISO 9001:2015 for quality management, ISO 14001 for environmental management, and multiple invention patents.

Q3Do you make custom products? What should I provide?

A3Yes, we offer full custom manufacturing from design to production.  We can produce according to your specifications, drawings, or samples.To start, please provide at least CAD drawings (2D) or 3D models (e.g., STEP, IGES, Pro/E). Our engineering team will then conduct DFM analysis and propose optimized solutions.

Q4What's the main products in your factory?

A4We specialize in precision metal components made through Metal Injection Molding (MIM) and Powder Metallurgy (PM). Our key products include:

Meat grinder plates & blades ,Gears (spur, helical, bevel, etc.),Porous (oil-impregnated) bearings,VVT rotors & stators,Chainsaw clutches,Structural parts & brackets,Lock components,SIM card slots & electronic housings,And other custom precision parts.

Q5How long it will take on customized samples production?

A5After we confirm the final drawings, the mold will take approximately 18 days, and samples will be delivered within 7 days. We will provide 20-30 samples for your testing, with  sampling period of approximately 25 days.

Production Details