Ferrule mold and ferrule

A ferrule injection molding core pin hardly worm. This core pin comprises a column portion having a first diameter at a portion where one end face of a ferrule is formed and having such a first angle of inclination that the diameter increases toward the other end, a circular cone portion having a second diameter larger than the first diameter at a portion where the other end of the ferrule is formed and having such a second angle of inclination larger than the first inclination that the diameter decreases toward the one end face, and a curved face inscribing the column portion and the circular cone portion and having an arcuate section. 一种套管注模芯销几乎不磨损。这种芯销包括：圆柱部分，该圆柱部分具有在形成套管的一个端面的部分处的第一直径以及这样的第一倾斜角，由于该第一倾斜角，其直径朝向另一端增大；圆锥部分，该圆锥部分具有在形成套管的另一端的部分处大于第一直径的第二直径，并且具有大于第一倾斜角的这样的第二倾斜角，由于该第二倾斜角，其直径朝向所述一个端面减小；以及曲面，该曲面与圆柱部分和圆锥部分相接并且具有弧形的截面。