LCM technology was developed by Lithoz and is based on the principle of photopolymerization. Ceramic powder is homogeneously dispersed in a light-sensitive organic matrix and selectively structured through mask exposure.
The body of the CeraFab system consists of a vat, filled with a photocurable slurry. Through rotation of the vat, a layer of slurry is applied with a static wiper blade. The vat is transparent so that the slurry can be lit from below. Lithoz uses a specially engineered projection system, whereby the light engine and the custom optical system are perfectly attuned.
LEDs are used for light exposure, due to their long working life, homogeneous light distribution and consistent output. The projected image is generated via a digital mirror device (DMD). The mirror array consists of more than two million mirrors, which are lit by the LEDs, and can be operated individually. Each of these mirrors can be turned on or off separately and simultaneously, which enables dynamic mask exposure. The advantage of this procedure is that the entire surface area is exposed at the same time, making the duration of light exposure independent of the size of the cross section to be exposed.