The casting device null by the titanium for dentistry or the levitation dissolution of the titanium

摘要

PURPOSE:To allow the casting of a Ti material in an ideal state without deteriorating the material by melting the Ti material in a vacuum chamber in a high frequency floating state without using a crucible and casting the melt thereof into a casting mold. CONSTITUTION:A high-frequency coil 5 for floating melting is mounted into the vacuum chamber 3 and a setting base 6 set with a Ti or Ti alloy ingot 4 is inserted into the coil 5. A prescribed atmosphere is maintained at need in the vacuum chamber 3 by using a vacuum discharge port 11 and an atmosphere gas introducing port 14. A high-frequency electric power is then supplied to the coil 5 to float the ingot 4 and the setting base 6 is retreated to drop the molten ingot 4 into a molten metal guide 9 set in a casting mold receiving base 7 installed in the lower part. The casting mold receiving base 7 and the molten metal guide 9 are rotated together with a balancer 10 in an arrow direction by a driving section 12 and, therefore, the molten metal dropped into the molten metal guide 9 is cast by centrifugal force into the casting mold 8. The casting of the Ti material is executed without using the crucible in this way and the Ti material adequate as the dental metallic material is obtd.