Lost wax process

Casting Investments. Casting investments are used to form molds into which molten metal may be cast. The cavity for receiving the metal is formed by the lost wax process. The composition of investments used for alloys cast from low (<1100° C) temperatures are different from those used for alloys cast from higher (>1300° C) temperatures. 

Most important, this bronze vessel has seams which show it to have been cast from a mold made in four separated sections. This wine cup required a complex ceramic mold, which sets the early Chinese bronze technology apart from the lost-wax process used in the West. 

B.C. and the famous Bronze Horse was cast by the lost wax process and not, as had been suggested, by a modern piece-mold sand casting process. In addition. X-ray radiography helped to provide details on the methods of manu-factuer of Sasanian silver and a Chinese bronze vessel. 

The radiographic study eliminated the most important arguments used against the authenticity of the horse. However the fact that the horse was proven to be cast with the lost-wax process did not automatically reestablish its authenticity. Careful visual examinations, elemental analyses, studies on corrosion products, metallurgical investigations, and various other technical studies were necessary to demonstrate that all physical characteristics of the bronze were entirely consistent... 

Figure 5.24 Lost wax process fabricated a high strength RP structural box beam...

The lost wax process of forming glass shapes has been used since the fifth century ce. Originally, the molten glass was poured into an outer mold made of beeswax, which could easily be removed. 

The investment-casting process - also known as the lost-wax process -is one of the oldest casting processes, having been practised for thousands of years. Today highly sophisticated plant, equipment and materials are employed to produce a large variety of components in materials ranging from high-temperature nickel- or cobalt-based alloys - known as superalloys - to the non-ferrous aluminium and copper alloys. 

Precious metal alloys are normally cast by means of the lost wax process. The well-known method of wax modelling is applied. For the commonly used casting procedure, centrifugal and vacuum pressure casting, the alloys can be heated by the following methods ... 

Investment casting (lost-wax process) n. A metals-casting method in which patterns made from wax or other expendable material are mounted on sprues, then invested , i.e., covered with a ceramic slurry that sets at room temperature. The set slurry is then heated to melt away the pattern, leaving a mold into which metal is poured. 

The investment-casting process - also known as the lost-wax process - is one of the oldest casting processes, having been practised for thousands of... 

Investment Casting. A process for the casting of small metal components to a close tolerance. In the usual process a wax replica of the part to be cast is coated ( invested ) with refractory powder, suitably bonded, and the whole is then warmed (150°C) to melt out the wax - hence the alternative name Lost-wax Process the refractory mould is then bred at 1000-1100 C. The refractory used may be powdered sillimanite or alumina, or specially prepared cristobalite the latter is particularly used in the application of the process in dentistry. B.S 1902 Pt 10 specibes methods for the determination of resistance to deformation at elevated temperatures permeability and standard air bow capacity at elevated temperatures thermal proble determination, for refractories for investment casting shell mould systems prefabricated brickwork, in which reinforcement is provided by steel rods running horizontally across perforations in the blocks. 

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