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High Volume & Low Per-Part Cost: Extremely fast cycle times and multi-cavity molds make millions of parts cheaply.
Material Efficiency: Minimal waste, especially with hot runner systems.
Precision & Repeatability: Capable of holding tight tolerances (as low as ±0.025mm or ±0.001”).
Reduced Assembly: Multiple features can be integrated into a single molded part (snap-fits, living hinges, gears).
Lightweight: Essential for portable and hand-held devices.
| Material | Key Advantages for Small Parts | Common Applications |
| Acetal (POM) | Excellent wear, low friction, high stiffness. | Precision gears, bearings, clips, latches. |
| Nylon (PA 6, PA 66) | High strength, toughness, wear resistance. | Small gears, cable ties, electrical connectors, rollers. |
| Polypropylene (PP) | Cost-effective, chemical resistant, good for living hinges. | Food container lids, small living hinges, caps. |
| ABS | Good impact strength, easily paintable, rigid. | Button caps, small housings, cosmetic bezels. |
| Polycarbonate (PC) | High impact, transparent, good heat resistance. | Lens covers, transparent windows, light guides. |
| LCP | Exceptional flow into thin walls, high heat resistance. | Ultra-thin-walled connectors, micro-components, SMT parts. |
| PEEK | Extreme performance: high temp, chemical resistance, strength. | Medical devices, aerospace, and high-temp automotive sensors. |
Small molded parts are the "unsung heroes" inside countless products:
Electronics & Connectors: SIM card trays, USB port covers, tiny gears for vibration motors, SMT components.
Medical Devices: Valve components, surgical instrument tips, catheter fittings, inhaler mechanisms.
Automotive: Sensor housings, connector latches, interior switch components, clip fasteners.
Consumer Appliances: (As previously mentioned) Button caps, water valve internals, gear trains for timers, small latches, and connectors.
Aerospace: Connector components, lightweight clips, ducting fixtures.
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