Hot runner apparatus, method for branching molten resin in the hot runner apparatus, and injection stretch blow molding machine

A hot runner apparatus comprising:

• a plurality of hot runner nozzles arranged in a row and having an upward injection direction;
• a horizontal runner portion disposed below the hot runner nozzles along a row direction of the hot runner nozzles;
• vertical runner portions upwardly extending from the horizontal runner portion for guiding a molten resin flowing through the horizontal runner portion into the hot runner nozzles;
• and
• an introducing runner portion continuous with an intermediate portion of the horizontal runner portion for guiding a molten resin from an introducing port, into which the molten resin from an injection apparatus having an injection direction in a horizontal direction is fed, toward the horizontal runner portion, wherein
• the introducing runner portion has a structure in which the introducing runner portion is bent toward the horizontal runner portion after reaching an elevation plane passing through a position of the horizontal runner portion in an up-and-down direction and continuous with the intermediate portion of the horizontal runner portion in the elevation plane, wherein
• the hot runner apparatus is provided under an injection molding mold of an injection stretch blow molding machine, the injection molding mold including:
• a plurality of preform molding portions;
• and a plurality of gates continuous with the preform molding portions,
• the plurality of hot runner nozzles are connected to the respective gates, and
• a molten resin injected by the respective hot runner nozzles is filled into the respective preform molding portions through the gates.