An apparatus is adapted to form a plurality of apertures in a panel made from a meltable foamed plastic material. The apparatus has a movable panel support device for supporting said panel and a heating array. The heating array has a plurality of heating elements mounted to a support frame. The heating array is disposed opposite to the panel support device. Each of the heating elements is adapted to emit sufficient heat to melt the foamed plastic material when a panel is positioned proximate the heating elements. A driving mechanism is provided for moving the panel support device toward and away from said plurality of heating elements. The panel supporting device moves a panel supported thereon, towards and away from the plurality of heating elements and during them movement melts a plurality of apertures in the panel.