| 摘要 |
<p>PURPOSE:An open tube is heated up to the preforming temperature and the one end is formed into the neck of bottle and the same time the other end is patterned and closed by fusing, thus producing title molded article free from cracking. CONSTITUTION:A tube material 1 of the thermoplastic resin with open ends on both sides is heated up to the preforming temperature on both ends and fitted to mandrel 2 that can move upward and downward by the aid of cylinder 6. Mandrel 2 is raised to the position of the mold 3 for forming the neck part, the mold 3 is closed at the same time the cylinder 5 is operated to push down mold 4 for forming the bottom that has a pattern with depth of over 0.05 mm and density of over 30/cm<2> on the inner surface and close the upper end of tube 1 into a dome. Simultaneously, the lower end is formed into neck with mold 3.</p> |
