PREFORM USED TO MOLD CONTAINER WITH HANGER AND METHOD OF MOLDING SUCH A CONTAINER

摘要

The present invention provides a preform used to mold a container with hanger. This preform (20) has a cylindrical bottomed barrel portion (22a), a flat plate-like hanger (26) having a central opening (26a) formed therethrough and a connection (24) formed on the bottom wall of the barrel portion substantially at the center thereof, the connection (24) connecting between the hanger (26) and the bottom of the barrel (22a). When this preform is injection molded, a molten plastic material is charged into the mold cavity through a gate (36e) communicating with the end of the hanger (26). The molten plastic material is divided into two branch streams at the hanger molding cavity region (36). These two streams are re-combined at the connection (24). The connection is of substantially circular cross-section and functions as a gate for permitting the molten plastic material to flow into the barrel molding cavity region (32).