A technology for casting the mould of steel ingot includes such steps as preparing core box according to design, making skeleton, winding tube on skeleton, drilling holes on core box at intervals, heating the casting membrane, vacuum-sucking it in the internal cavity of core box, filling moulding sand, vibration compact, releasing negative pressure, applying positive pressure, lifting up the core box, making sand box, winding tube, putting it in sand box, adding moulding sand, vibration compact, applying positive pressure, sucking casting, applying negative pressure, lifting up sand box, putting internal core in it, closing sand box, casting and demoulding. |