Number having a symmetric curvature with its curvature pogwan molding method and molding apparatus of curvature

摘要

These ampoules are used in a water level, the center of the ampoule is a curved symmetrically. In the manufacturing process, first of all, a glass-pipe is cut. And also, the center of the cut glass-pipe is heated and rotated. Therefore, one-end of glasspipes are closed. These one-end closed glass-pipes are cleared and a ceramic notch mark is printed on the one-end closed glass-pipe. Then, the center of the ampoule is curved symmetrically by the curvature-forming apparatus. This apparatus consists of a burner (24), rollers (28,31,33) and gap- controlling plate (34).