The present invention is a method and apparatus for controlling a mold flow process using inner (impinge) and/or edge temperature sensors, wherein articles processed in a constraining mold cavity, having a constant melt nullshrinknull quality, can be obtained even with fluctuations in resin nullmeltnull properties (flowability). At least one temperature-dependent output or nulltriggernull signal is sampled, and the level of the signal (e.g., temperature) initiates at least one step in the molding cycle. Using a sampling circuit, thermal waveforms are obtained from thermal sensor array data such that if a sequence of melt temperature set-point trigger times fluctuates outside control limits, then the process melt-flow is judged as a hotter/faster melt-flow or cooler/slower melt-flow injection process. In one embodiment, an initial melt temperature set-point nulltriggernull and second reference set-point nulltriggernull may be combined to control the closure of at least one cavity gate. The shut-off time is controlled in accordance with, and as a fluctuation of, an injection melt-flow time and temperature profile. For example, the nozzle orifice of the injection-molding machine 198 is the melt-flow exit to mold melt nullendnull of dynamic flow exchange point. The orifice area sets an initial melt-flow rate (where a small orifice has a longer melt-flow length with greater melt shear temperature increase and a longer exit time versus a larger orifice with lower melt shear temperature increase and a shorter exit time for an equivalent shot size). Each mold cavity final melt-flow nullpacknull volume is preferably controlled by a gate cavity melt shut-off system that is responsive to the sensed temperature(s), resulting in each cavity melt-flow injection process volume being held substantially constant, for a uniform resin nullshrinknull density.