Preparation method of thin-wall high-strength mold shell for single crystal blade manufacturing

The invention discloses a preparation method of a thin-wall high-strength mold shell for single crystal blade manufacturing. The preparation method comprises the following steps of: A1, a shell manufacturing process: (1), size preparation, (2) slurry hanging, (3) sand spraying, (4) repeating the operations till preset number of layers are formed, (5) slurry sealing, dipping a wax mold in a slurry barrel, completely dipping, taking out, and drying; and A2, winding carbon fibers and drying. The carbon fibers are wrapped; compared with a traditional silicasol mold shell, the thin-wall high-strength mold shell has the advantages that under the precondition of ensuring the thermal strength of the mold shell, the layer number of the mold shell is reduced, so that the integral thickness of the mold shell is reduced, the heat conduction capacity of the mold shell is improved, and the preparation method is beneficial to the improvement of temperature gradient. Adopted carbon fiber cloth is made of amorphous graphite; and the amorphous graphite has a thermal conductivity lambda 2 of more than 100, and is an ideal heat conduction material; and the amorphous graphite has a tensile strength of more than 3,400 MPa, and creates a condition for reducing the thickness of the mold shell.