FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy. Sand mix with binder and filler is fed to casting pattern and brought in contact with hardening catalyst. Said mix is cured and hardened casting pattern is removed. Hardening catalyst is made up of mix of three basic nitriles. Each of the latter features differing hardening reactivity and/or smell intensity.
EFFECT: safe transfer and adjustment of hardening kinetic properties.
16 cl, 2 tbl, 2 ex
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