To put it bluntly, the molten die forging process, simply put, is to use fusible raw materials, such as wax or plastic into a fusible solid model, commonly known as the molten die or solid model, on which a number of layers of refined fire-resistant architectural coatings, through the dry and hard bottoming to produce a general shell, and then use steam or boiling water from the shell to melt off the solid model, and then the shell placed in the sand box, in its surroundings filled with dry sand modelling design. Finally the mould is put into the calciner and fired at high temperature. If a high toughness shell is chosen, the mould can be fired immediately without the moulding design, and the mould or shell is fired and the molten metal material is poured in it to obtain the casting.
Melting die precision casting parts specification accuracy is high, generally can reach CT4-6, sand casting for CT10 ~ 13, aluminum die-casting for CT5 ~ 7, natural because of the melting die forging process the whole process is complicated, jeopardize the casting specification accuracy of more elements, such as die material collection, melting die deformation, mold shell in the heating and cooling process of the line amount of transformation, aluminum alloy shrinkage rate and its in the process of condensation Therefore, the consistency of the general molten die castings needs to be improved, despite the high accuracy of the specifications, and the consistency of the castings made from medium and high temperature waxes needs to be improved.
The molten moulds are suppressed by the use of pressure plates with a high surface finish on the concave moulds, resulting in a very high surface finish. In addition to this, the shell is made of a unique heat resistant adhesive and fire resistant insulation material, configured as a fire resistant architectural coating to be hung on the molten mould, resulting in a high surface finish on the inside of the injection mould which is in direct contact with the molten metal material. Therefore the surface finish of the investment casting parts of the investment mould is higher than that of the general cast iron parts, which can generally reach Ra.1.6~3.2μm.