Reform manner null of Al sintering machine

摘要

PURPOSE: To stably sinter without damaging a die and obtain the stable dimension after sintered. ;CONSTITUTION: In correcting of Al base sintered machine part of a real density ratio after sintering being 80 to 100%, plural numbers of recessing parts 12a, 12c, 12e and projecting parts 12b, 12d, 12f are installed at least on one side face among the internal face of a die 12 or the external face of a core rod. In the recessing parts 12a, 12c, 12e, the coining stock with an body to be corrected is made under than 0. In the projecting parts 12b, 12d, 12f, the coining stock c is 10 to 100μm. When the body 11 to be corrected is reciprocated at least by one time on the projecting parts 12b, 12d in the up and down axial direction of the die, the corrected body with a prescribed dimension is obtained. Without damaging the die, the coining stock c can be made largely. Without relating to the dispersion of dimension of the body 11 to be corrected, the coining stock c is stabilized in positive.;COPYRIGHT: (C)1996,JPO