Improvements for aluminotermic welding procedure with single-use crisol and mold, and apparatus for implementation of such improvements. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements for aluminothermic welding process with crucible and single-use mold, and apparatus for putting said improvements into practice; the method comprising the positioning of a sand mold with binders in the joint zone between the pieces to be welded; the preheating by means of a calibrated burner apparatus of a mixture of fuel gas and induced air or oxygen with a nozzle that is introduced through the pouring pan of the mold; and placing the crucible on the mold to initiate the aluminothermic reaction with pouring of the molten metal into the mold after the opening of an automatic pop-up device of the crucible; where the preheating is carried out by means of a burner apparatus of a fuel mixture with an essentially constant flow of air blown by a motorized turbine, in order to obtain a higher combustión temperature while maintaining the calibration or stability of the heat supplied. (Machine-translation by Google Translate, not legally binding)