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Title:
PRODUCTION OF CLEAN PRECISION CAST PRODUCT
Document Type and Number:
Japanese Patent JPH0716725
Kind Code:
A
Abstract:

PURPOSE: To produce a highly clean precision cast product by sucking up molten metal from the center upper part of a molten metal column after removing non-metallic inclusion in the molten metal by using electromagnetic force and pouring the molten metal.

CONSTITUTION: In the cold crucible type high frequency induction melting crucible 1, the bar of the melting base metal 5 is inserted from the bottom and levitation melting is executed to the metal 5 in the inert gas atmosphere. By utilizing circular flow of the molten metal generated by the electromagnetic force in the formed molten metal column 6, nonmetallic inclusion 7 existing in the molten metal is conc. around the base part as scum 8 and removed. Thereafter, by inserting a snout 3 into the center upper part of the molten metal column 6, the molten metal is sucked up and poured into a ceramic shell mold 2. As the material for the snout 3, a metal having m.p. higher than that of the casting metal is used. By this method, the product having high reliability and long service life can be obtd.


Inventors:
DEMUKAI NOBORU
Application Number:
JP16714793A
Publication Date:
January 20, 1995
Filing Date:
July 06, 1993
Export Citation:
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Assignee:
DAIDO STEEL CO LTD
International Classes:
B22D21/00; B22D18/06; B22D23/00; B22D27/02; B22D43/00; F01D5/28; (IPC1-7): B22D18/06; B22D21/00; B22D23/00; B22D27/02; B22D43/00; F01D5/28
Attorney, Agent or Firm:
Sou Suga



 
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