FIELD: metallurgy.
SUBSTANCE: claimed process comprises the making of model of a solid rod as the tube grown by prototyping process. The model inner cavity complying with the cast cavity is lined by multiple dipping in the suspension. After every dipping, the model is revolved for 10-30 s. The model is filled with refractory material containing pulverbakelite. The rod is baked.
EFFECT: production of complex 20-40 mm diameter bores up to 400 mm long.
5 dwg, 1 ex
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