Optical CMM Gauge Capability Evaluation for Sub Millimeter Molded Features
Optical CMM capability on sub-millimeter molded features requires material-specific bias correction and telecentric backlighting to maintain GR&R under 20%.
Micro Molding Capability
Meaning
Production capacity for creating extremely small plastic parts involves specialized machinery that handles shot weights measured in milligrams. Assessing micro molding capability determines if a facility can produce high precision components with features smaller than one millimeter.
Tooling Precision
Fabrication of the mold requires advanced techniques such as electrical discharge machining or laser ablation. A high micro molding capability depends on the ability to maintain tolerances of a few microns within the steel cavity. These tools must also account for the thermal expansion of the material during the injection cycle.
Material Flow
Behavior of polymers at very small scales differs from standard injection processes due to rapid cooling and surface tension. When micro molding capability is evaluated, the focus is on whether the resin can fill thin walls and sharp corners before it solidifies. Proper venting and mold heating are required to ensure the parts are fully formed.
Yield Expectation
Demonstration of a repeatable process rate is necessary before moving from a prototype to a full production run. While a supplier might provide a forecast for output, the actual micro molding capability is proven only when thousands of parts are produced with a consistent weight and dimension. High scrap rates in the early phases often indicate a need for better thermal control.