Injection blow molding system with enhanced parison mold configuration

摘要

An injection blow molding (IBM) system and method for forming a plurality of parisons and molded articles. The IBM system includes an injection station having upper and lower die sets and a plurality of upper and lower mold half blocks each attached to a respective die set. Each of the upper mold half blocks has a corresponding lower mold half block with which it cooperatively defines one or more cavities for forming the exterior shape of the body of one or more of the parisons. The individual, independent attachment of the mold half blocks to the die sets allows easy individual replacement of faulty or worn mold blocks. Further, such an independent attachment configuration also permits the mold half blocks of each die set to be spaced from one another, so as to reduce thermal expansion problems and ease dimensional tolerances required for the width of the mold half blocks.

主权项

1. A split parison mold assembly for forming a parison with an injection blow molding system, said assembly comprising:
one or more pairs of upper and lower multi-cavity parison mold half blocks, wherein each pair of said mold half blocks comprises an upper body mold half and a lower body mold half and an upper neck mold half and a lower neck mold half, wherein said upper and lower body mold halves cooperatively define body portions of a plurality of parison forming cavities, wherein said upper and lower neck mold halves cooperatively define neck portions of the plurality of parison forming cavities, wherein said upper body mold half and said upper neck mold half are at least partially separated by an upper insulating gap, wherein said lower body mold half and said lower neck mold half are at least partially separated by a lower insulating gap.