Lost Wax

Foundry Lost-wax 

Lost wax casting Foundry - Features

Lost-wax casting Foundry

Use

Thanks to lost-wax casting (or Investment casting) it is possible to produce castings with highly complex shapes. The resulting castings are particularly faithful to the original and accurate in detail, and posses a high quality surface finish, flexibility and reduced engineering tolerance.

Technical characteristics

Thicknesses
Minimum thicknesses or extremely small surfaces (edge of components) of 1.5 mm can be obtained.

Holes
Must have a minimum diameter equal to 2/3 of the wall thickness. Holes with a minimum diameter of 3 mm can be obtained.

Weight
From a few grams up to 10 kg.

Roughness and Tolerances

Roughness
The casting has a variable surface roughness of 3 ÷ 5 microns, depending on the type of material used.

General tolerances
The best linear tolerance is about
 ± 0.7 % of the nominal dimension, with a minimum of ± 0,1 mm for heights less than 14 mm. For narrower tolerances, a selection of castings can be used. Angle tolerances are ± 30°. Circularity, concentricity and parallelism tolerances can be considered in principle about ± 0.1 every 20 mm of height.

Production

In lost-wax casting (Investment casting), a wax model is made that then volatilises inside the furnace, thus creating a cavity to be filled with the molten metal.
The thickness of the coating material must be such as to resist the heat and pressure resulting from the pouring of the molten metal. Several coats are applied to the shell until obtaining the required resistance characteristics. 
At this point, the structure is placed in the furnace where the wax melts and evaporates, creating a fully-functional mould.

Controls and analysis

The aluminium testing laboratory is an integral part of the production process. This allows the metallurgical and structural levels of production to be kept under control, in compliance with UNI standards.

High expectations

What makes the lost-wax casting so special is that it produces a compound characterised by a perfect surface with very narrow tolerances and roughness. In addition, castings with very complex shapes can be produced.

68

PRODUCTION FACILITIES

110

TECHNICIANS AND ENGINEERS

146

TECHNICIANS AND ENGINEERS

43

% OF FOREIGN CLIENTS

Metals and alloys cast by Lost-wax foundries

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