The Use of Blind Heads in the Manufacture of Steal Castings

摘要

Studies are presented showing the practical value of "blind risers" as a worth while substitute for open risers in making various types of castings and as an adjunct to the open riser in making others. The theoretical aspects of the process are discussed in the light of present knowledge supplemented with experimental evidence obtained at Naval Research Laboratory and photographs of actual castings made in commercial shops. Operating foundry principles, precautions advantages and disadvantages are discussed in detail.