METHOD FOR MAKING INVESTMENT PATTERNS Russian patent published in 2004 - IPC

Abstract RU 2231413 C2

FIELD: machine engineering, namely manufacture of castings with use of investment patterns.

SUBSTANCE: pattern is made of material containing powder of sodium chloride clad with pattern composition and having fraction size 0.1 - 1.6 mm. Material includes components at next relation by volume: pattern composition, 10 - 65%; sodium chloride, 35 -90%. Pattern material is metered into press-mold in quantity providing manufacture of patterns with porosity 3 - 10%. Pattern material is pressed without preliminary heating due to matching parting surfaces of press-mold. At pressing pattern material is sintered practically without phase deformation with formation of open capillary porosity which compensates temperature expansion of pattern at melting it out of ceramic mold.

EFFECT: enhanced dimensional and geometry accuracy of castings and patterns.

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RU 2 231 413 C2

Authors

Sapchenko I.G.

Zhilin S.G.

Evstigneev A.I.

Dates

2004-06-27—Published

2000-12-21—Filed