| 摘要 |
<p>A method and apparatus controlling a mold melt flow using inner (impinge) and/or edge temperature sensors (316, 310, 312, 314). Thermal waveforms from thermal sensor array data such that if a sequence of melt temperature set-point trigger times fluctuates outside control limits, then the melt-flow is judged as a hotter/faster or cooler/slower melt-flow injection process. An initial melt temperature set-point 'trigger' and second reference set-point 'trigger' are combined to control the closure of at least one cavity gate in accordance with an injection melt-flow time and temperature profile. The nozzle orifice (310) area sets an initial melt-flow rate. Each mold cavity (318) final melt-flow 'pack' volume is preferably contolled 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 'shrink' density.</p> |
