A process for the preparation of a monolithic laval nozzles

摘要

A process for the preparation of a monolithic laval nozzles (1) with the use of at least a not - metallic negative mold, comprising the steps of producing a negative mold, consists of a not - metallic material, producing a positive mold (2) with a first cone (3) by electroforming and removal of the negative mold, consists of the positive mold (2), generating a second cone (4) in the positive mold (2), introduction of a microhole (5) in the positive mold (2) and purification of the finished nozzles.