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Ceramic cores for precision casting

セラミック中子

NORITAKE's ceramic cores for precision casting offer excellent stability at high temperatures. Used for
manufacturing high-precision moving blades and stationary ones for gas turbines and jet engines, these
ceramic cores contribute greatly to engine efficiency. They also allow assembling by jointing in manufacturing
complex-shaped objects like cores for pump impellers.

NEW PRODUCT  Medium-pressure Injection Molded Ceramic Cores

Features

  • Advanced Precision Casting
    Dimensional accuracy and high-temperature stability contribute to advanced precision casting.
  • Satisfactory Casting
    Slightest defect and excellent smoothness of the surface enable satisfactory casting.
  • Superior Solubility
    Steady rate of pores allows superior solubility.

Ceramic core manufacturing processes

Ceramic core manufacturing processes

Core material characteristics

Material model N-200 ℃ MONARC NEW N600 N700
N300 N400 N500
Major ingredients SiO2-ZrSiO4 SiO2-ZrSiO4 SiO2-ZrSiO4 SiO2-Al2O3 SiO2-Al2O3 SiO2-ZrSiO4
Molding method Pouring method Method-pressure injection molding High-pressure injection molding
Trace impurities(ppm)
Fe 300 80 80 30 200 300
Pb <25 <25 <25 <25 <25 <25
Bi <1 <1 <1 <1 <1 <1
Ag <1 <1 <1 <1 <1 <1
Characteristic values
Porosity(%) 30.0 34.0 33.0 34.0 35.0 34.0
Thermal expansion rate(%) at1,000℃ 0.25 0.25 0.25 0.10 0.10 0.25
Bending values(Mpa)
at  RT 7 6 9 8 7 10
at 1,000℃ 24 20 25 24 20 22
Size(mm)
Maximum length ~L1000 ~L500 ~L300 ~L250
Minimum length 0.80 0.60 0.60 0.35
Cast type CC/DS/SC CC CC/DS/SC CC CC/DS/SC

Selection is made from among the above materials on the basis of the molten metal temperature, casting materials, and shape (size) of the cast product specified in the customer’s request.