| 摘要 |
<p>PURPOSE:To offer a plastic hollow body by blow molding which is superior in joining strength, by a method wherein a protection is provided in a protruded state on the backside of an insertion article to be obtained by laying an external fringe part of the same by wrapping up in a plastic wall and a swollen part formed on the tip of the same is laid by wrapping up in the plastic wall. CONSTITUTION:After a fitting bracket 20 has been arranged within a cavity 44, a parison P in a plasticizing state which has been extruded by an extruding machine for thermoplastics is arranged between split type molds 41, 42. Then when the parison P is preblown and the molds 41, 42 are closed, the parison P is welded partly between one side cavity 43 and the fitting bracket 20, the plastics of the confronting parison P is welded unitarily and positioned around the fitting bracket 20. When closure of the molds 41, 42 is made to progress further, the parison P is compressed and the same is made to expand along shapes of the cavities 43, 44 and fitting bracket 20 by introducing a pressurized fluid within the parison.</p> |
