METHOD OF SIZE CONTROL OF INVESTMENT PATTERN Russian patent published in 1999 - IPC

Abstract RU 2136431 C1

FIELD: foundry. SUBSTANCE: for carrying out testing, specimen is made in form of flat H-beam. Specimen models free and hindered shrinkage of pattern. It is used for determination of deviation of sizes from nominal sizes of pattern cavity, treatment and estimation of accuracy class of withdrawn patterns. Method allows estimation of real values of pattern sizes deviations after their manufacture and in service. EFFECT: higher efficiency. 1 dwg

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RU 2 136 431 C1

Authors

Evstigneev A.I.

Chernomas V.V.

Dates

1999-09-10—Published

1996-01-29—Filed