Dynamic mold surface temperature control (DMTC) has the advantage of improving molded part qualities without significant increases in cycle time. A gas-assisted heating system combined with coolant was developed to achieve DMTC for injection molding. With gas-assisted heating, it takes 2 seconds for the mold surface temperature to vary from 60C to 120C whereas it requires 186 sec using coolant heating. Further, it takes 21 sec and 84 sec for the mold surface to cool to 60C under gas heating and coolant heating, respectively. The gas-assisted heating system also shows excellent efficiency for micro injection molding of biochips to achieve high replication accuracy of the micro channels.
展开▼
