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Title:
PRODUCTION OF AIR PERMEABLE DURABLE MOLD
Document Type and Number:
Japanese Patent JPH07108348
Kind Code:
A
Abstract:

PURPOSE: To provide the process for producing the air permeable durable mold having good dimensional accuracy without generating the crack by segregation of aggregate and the unequalness of the mold surfaces.

CONSTITUTION: A slurry mixture is prepd. by compounding and mixing a hardening auxiliary material 23 which softens and melts in the process of calcination at a weight ratio of 10 and 35 and a binder which contains components to evaporate at 10 to 25, respectively with 100 aggregate formed by compounding metallic powder contg. ≥80% particles of ≤300μm and oxide 21 of the same metal at a ratio of 5:95 to 30:70 by weight. The mold obtd. by pouring such slurry mixture is dried and is further calcined at 600 to 1200°C in an oxidizing atmosphere.


Inventors:
FUMA TOYOJI
NISHIKAWA KAZUYUKI
HAYASHI YOJIRO
MAKIGUCHI TADASHI
INAGAKI TAKEHIRO
NISHIOKA KOJI
KAWAGUCHI MITSURU
Application Number:
JP27750093A
Publication Date:
April 25, 1995
Filing Date:
October 08, 1993
Export Citation:
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Assignee:
SINTOKOGIO LTD
International Classes:
B22C9/06; B22F3/22; B22F5/00; B22C9/02; B28B1/26; B29C33/38; (IPC1-7): B22C9/02; B29C33/38



 
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