Skin-forming apparatus and method

A skin-forming apparatus comprising:

• a mold having a cavity defining a skin-forming space;
• and
• a vent core system coupled to the mold for discharging residual gas in the skin-forming space to an outside during injection of resin supplied from an injector, wherein the vent core system comprises:
• a vent hole formed in the mold and connecting the cavity of the mold to the outside;
• a vent core mounted in the mold for opening an inlet of the vent hole to discharge the residual gas in the cavity through the vent hole or closing the inlet of the vent hole to block leakage of the resin;
• a temperature sensor mounted in the mold and located in a resin flow course in the cavity while being spaced apart from the inlet of the vent hole by a predetermined distance;
• a controller for outputting a control signal for opening or closing the inlet of the vent hole based on a temperature measured by the temperature sensor;
• and
• a core driving unit for driving the vent core to perform opening and closing operations based on the control signal of the controller.