| 摘要 |
<p>PURPOSE:To easily manufacture a multiple mouthed blow-molded part in a single molding process by a method wherein a plurality of cores and cavities are respectively used so as to independently inject synthetic resins from the cavities and high pressure air is blasted in parisons, which are produced by being independently injected in parallel, so as to expand the parisons in order to closely contact with each other at the middle of both the parisons. CONSTITUTION:Synthetic resin is injected through runners 8 into gaps 5 and 6 under the conditions that two cores 2 and two cavities 3 are respectively heated to a certain temperature and split molds 1 are cooled. In this case, the resins filled in the gaps 6 produce the side walls 10, which have thread-shaped beads corresponding to the grooves 7, while the resins filled in the parison gaps 5 are kept in heated state and formed in parisons 11, which do not solidify and are held at the temperature, at which the blow molding is possible. After that, the cavities 3 are dismounted and, in exchange, a cooled blow cavity bottom force 12 is inserted in the bottom of the split molds 1, and then, high pressure air is blasted through the respective air blowing-in ports 9 of the two cores 2 so as to stretch the parisons 11 by expanding in order to closely contact the parison 11 with the inner surfaces of the side walls and of the bottom force 12.</p> |
