Core for the making of castings equipped with slen

专利名称：Core for the making of castings equipped

with slender ducts

发明人：Karl Wustrow申请号：US05/788368申请日：19770418公开号：US04217949A公开日：19800819

摘要：In foundry manufacture of metallic castings it is customary to employ inserts toform elongate ducts whether rectilinear curved or branched ducts and whether ofregular cross-section or varying cross- section, including enlarged cavities. A core insert isdisclosed which has a wire formed outer tubular casing and an internal wire structure, thecore insert being removable in stages. Removal is accomplished by first removing acentral longitudinal wire, then any intermediate layer is removed and finally by uncoilingthe outer tubular casing, which has preferably previously been wound in such manner andof such diameter wire as to avoid, so far as possible, any exaggerated surface undulations.

申请人：WUSTROW, KARL

代理机构：Warren, Chickering & Grunewald

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