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LOST WAX TECHNOLOGY "high dimensional accuracy,buautiful casting surface"

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High Level of Technology and Quality

Lost Wax Casting offers greater dimensional accuracy and finer casting surface than traditional casting. Integrated complex-shaped parts can be mass produced. Applicable materials are much more diverse than die casting, such as low and high melting metals including titanium, aluminum, copper alloy, etc. CASTEM's lost wax casting has improved in our own way, developing the basic technology established in the U.S. High precision screws and gears that used to been made only by cutting process before, can be manufactured by lost wax casting. We offer unbeatable quality.

3D Model butterfly made by lost wax casting

3D Model butterfly made by lost wax casting : Lost wax is superior in making complex, thin wall shapes.


What is "Lost Wax Casting?"

• Production Flow

Die/mold Making

1. Die/mold Making

Make a die/mold to inject wax into.

Wax forming process

2. WAX Forming

Inject molten wax into a mold, then assemble formed wax patterns on a wax tree.

Ceramic coating process

3. Ceramic Coating

Dip the wax tree in ceramic slurry and coat it with ceramic powder. Repeat this to make a solid shell.

Casting process

4. Casting

Melt out the wax from the ceramic shell to make cavity, then pour molten metal in it.


5. Finishing/Machining

Break shell and cut each part off a tree, then carry out fabrication (hole processing and cutting) & finishing (dimensional checks and adjustments.)


"Lost wax casting" is a manufacturing method named after its process, fire a wax pattern coated with ceramic shell to melt out the wax, then pour molten metal inside the ceramic shell. Complex shaped parts can be manufactured with diverse materials.

Click to watch lost wax process

• Advantages of Lost Wax Casting

Lost wax casting is suitable for manufacturing thin wall parts, three dimensional parts.

Security parts that require high strength.


By integrating several parts into a single part, production cost can be saved by reducing the number of parts and processes.

It also features beautiful casting surface with fine metallic structure.


Castem's Lost Wax Casting


Parts with complicated shapes, three dimensional curves can be manufactured in large quantities at low cost.



Choice from a wide range of materials, including special steel, stainless steel, copper alloy, aluminum alloy, etc.In trial process, several materials can be compared easily, because one same mold can be used for different materials.



Neighboring or attached parts can be integrated into a single part. Weaknesses caused by assembly or welding can be eliminated.As for moving parts, unnecessary inertia force can be eliminated, and the durability can be increased by weight reduction. So the strength can be pursued from shape and material point of view.


Casting surface

Approximately 12S for small parts, 20S for large parts (slightly different depends on the material)



Dimensional accuracy is excellent, compared with other investment casting, result in less total number of required processes.


• Metallic Structure

Right : Castem,  Left : Others

Cost Reduction

• Cost Reduction by Integrating Parts
Multiple cutting and assembly processes.

Multiple cutting and assembly processes.

Lost wax casting

Lost wax casting


70% Cost reduction by switching to lost wax casting, eliminating multiple cutting and assembly processes.

• Cost Reduction by Shape Optimization
Multiple cutting/machining processes

Multiple cutting/machining processes.

Lost wax casting

Lost wax casting


50% Cost reduction by switching to lost wax casting, eliminating multiple cutting/machining processes and the waste of material.


Die/mold Cost

Die/mold production cost is quite low(about 75% lower than die/mold for plastic parts). Die/mold is semi-permanent once it is made. It is easy to change design or change materials, using one same die/mold.



You can choose from a wide variety of materials, such as special steel, stainless, copper alloy, alminum alloy, etc. It is easy to compare materials in the trial process, because one same mold can be used for different materials.


Processing Cost

<Trial Process, Small Lot Production>
Because of the low die/mold cost, cost per piece is definitely lower than other manufacturing processes.
<Quantity Production>
By selecting the most suitable casting way, we can offer a competitive price.


Assembly Cost

By integrating parts and casting them as a single piece, production cost is expected to be reduced significantly.


Lost Wax Casting Products

Simple sheet metal shaped parts

Simple sheet metal shaped parts

Pipe shaped parts

Pipe shaped parts

Thin three dimensional parts

Thin three dimensional parts

Cam gears, sprokets

Cam gears, sprokets


For more information on lost wax applications