Mold tryout is the process of testing a new injection mold to verify it produces parts meeting specifications. A thorough tryout process identifies issues early, optimizes the process window, and ensures smooth production ramp-up.
T0 (First Trial): First time the mold runs on a machine. Focus: check basic function, identify obvious defects (short shots, flash, ejection issues), verify gate and runner function. Typically run 20-50 shots.
T1 (First Sampling): After initial adjustments. Focus: dimensional verification, process window development, material selection confirmation. Typically run 50-200 shots across multiple process conditions.
T2 (Production Sampling): After tooling modifications. Focus: validate all fixes, run capability studies, finalize process parameters. Typically run 100-500+ shots and submit parts for full inspection.
A process window defines the range of parameters (melt temperature, injection speed, pack pressure, cooling time) that produce good parts. Scientific molding methodology uses a systematic approach: viscosity curve, cavity balance study, pressure drop analysis, gate seal study, and cooling time optimization.