Investment casting is the modern embodiment of the very ancient lost wax casting.
The process starts by making a wax model of the desired component. Here the wax part is injection molded.


Wax patterns are assembled onto a common wax sprue

The assembled tree is then coated with a refractory slurry.

The slurry is then covered with a dry refractory powder. This is repeated many times.

An investment of refractory material is built up.

The wax is melted out, and the ceramic investment is fired to form a strong mold.

The mold is then heated further and poured.

The investment is then removed mechanically.

The individual parts are then separated and finished.
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