METHOD FOR PRODUCING SAND MOLD FOR CASTING AND CORE FOR CASTING

To provide a technique capable of integrally producing a large-sized sand mold for casting with a cavity of a complicated shape having undercuts in two or more directions in a planar view in a short time at high precision.SOLUTION: A method for producing a sand mold for casting comprises: a sand blo...

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Bibliographic Details
Main Authors HOTTA MASAHIRO, IIMURA TAKASHI, KONISHI NOBUO, IKE HIROYUKI
Format Patent
LanguageEnglish
Japanese
Published 24.09.2020
Subjects
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Summary:To provide a technique capable of integrally producing a large-sized sand mold for casting with a cavity of a complicated shape having undercuts in two or more directions in a planar view in a short time at high precision.SOLUTION: A method for producing a sand mold for casting comprises: a sand block formation step in which a sand block 4 satisfying at least one of a compressive strength of 15 to 50 (N/cm2) and a bulk density of 1.0 to 2.0 (g/cm3) is formed; and a removal working step in which, using a numerical value control working machine, removal tools 43 are progressed from at least two or more directions in the planar view of the sand block 4, and the sand block 4 is subjected to removal working to produce a core 7 of a sand mold 1 for casting with a cavity 70 having undercuts 6.SELECTED DRAWING: Figure 9 【課題】平面視で２方向以上のアンダーカットを有する複雑形状のキャビティが形成された大型の鋳造用砂型を、短時間で一体的に精度良くできる技術を提供する。【解決手段】鋳造用砂型の製造方法は、圧縮強度が１５〜５０（Ｎ／ｃｍ２）、又は、かさ密度が１．０〜２．０（ｇ／ｃｍ３）の少なくともいずれか一方を満たす砂ブロック４を形成する砂ブロック形成工程と、数値制御加工機械を用いて、砂ブロック４の平面視にて除去工具４３を少なくとも２方向以上から進入させて砂ブロック４を除去加工することでアンダーカット６を有するキャビティ７０が形成された鋳造用砂型１の中子７を製造する除去加工工程とを含む。【選択図】図９
Bibliography:Application Number: JP20190051994