Lost wax casting

Lost wax casting is a process used to create highly detailed, complex, and high-quality metallic or alloy objects that may feature intricate undercuts that would be impossible to achieve with other casting techniques involving steel or rigid molds.

This process is widely used in manufacturing industries for precision parts production, even in small sizes, such as components for aerospace, the automotive industry, dentistry, watchmaking, eyewear, jewelry, and much more. It is particularly useful when producing small to medium quantities of objects with intricate shapes.

SOME OF THE METALS COMMONLY CAST BY LOST-WAX INVESTMENT CASTING INCLUDE:

✔ Steel
✔ Stainless steel
✔ Bronze alloys
✔ Brass
✔ Gold and silver
✔ Aluminum alloys
✔ Nickel alloys
✔ Titanium alloys

Here's how it works in simple terms:

1

Wax Model Creation

The process starts with the creation of a wax model of the desired object. This wax model can be made through casting, molding, or manual craftsmanship. The wax model is an exact replica of the intended object.

2

Assembly of Wax Models

If needed, multiple wax models can be assembled together to form a single complex assembly.

3

Ceramic or Plaster Coating

The wax models or wax assemblies are then coated with one or more layers of refractory ceramic material or plaster. Once dry, this coating creates a solid outer shell capable of withstanding high temperatures.

4

Wax Elimination

The solid shell of refractory ceramic material or plaster is then inverted and heated in an oven, causing the wax inside to melt and flow out by gravity, leaving an empty cavity in the rigid shell that precisely matches the desired shape of the piece to be produced.

5

Metal Casting

Once the ceramic or plaster shell is ready, it is placed in a high-temperature furnace for preheating. Molten metal is then poured into the cavity left by the lost wax. The molten metal will perfectly fill the internal space, solidify, and take the desired shape.

6

Cooling and Solidification

After metal casting, the shell is slowly cooled. This process allows the metal to fully solidify and achieve the desired properties.

7

Shell Breakage

Once the piece is completely solidified, and the outer shell has cooled, it is broken or dismantled to reveal the finished piece inside.

8

Finishing and Processing

The cast piece may require additional processing, such as grinding, sanding, polishing, or other finishing operations to achieve the desired dimensions and surface roughness.

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