TECHNOLOGY

LOSTWAX TECHNOLOGY

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.

Production flow

  1. Die/mold making Make a die/mold for wax forming.
  2. Wax forming Inject wax into the die/mold.
  3. Spruing Glue the formed wax patterns to the wax runner by branch-like connections (wax tree).
  4. Coating Coat the wax tree with ceramic material to make a mold.
  5. Dewaxing Rapidly heat the mold, then the material of the wax patterns is burnt or melted away.
  6. Firing The wax is being completely burnt away and the mold is hardened, then it is finished.
  7. Casting Pour molten metal into the finished mold.
  8. Mold breaking Break the ceramic shell to remove the metal inside.
  9. Cutting Cut the parts off from the wax tree.
  10. Product inspection Check the products for pits and distortions and fix them where necessary.
  11. Machine processing To carry out optimal machine processing, we select the machine tools that are most suitable for the item, by putting the emphasis on cost or precision, or by enabling large-item handling.

Castem's Lost Wax Casting

  • Shapes Parts with complicated shapes, three dimensional curves can be manufactured in large quantities at low cost.
  • Materials 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.
  • Casting surface Approximately 12S for small parts, 20S for large parts (slightly different depends on the material)。
  • Accuracy Dimensional accuracy is excellent, compared with other investment casting, result in less total number of required processes.
  • Strength 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.
  • Metallic Structure

Cost Reduction

  • Cost Reduction by Integrating Parts
    Multiple cutting and assembly processes.
    Lost wax casting
    70%Cost reduction
  • Cost Reduction by Shape Optimization
    Multiple cutting/machining processes.
    Lost wax casting
    50%Cost reduction
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.
Materials 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.

INITIATIVES