PREFORM MANUFACTURING DEVICE, MANUFACTURING METHOD, AND MOLD FOR COOLING

原文（中文）

A preform manufacturing apparatus includes an injection molding unit, a post-cooling unit, and a taking-out unit. The post-cooling unit includes a first mold which accommodates the preform inside and which contacts the outer surface of the preform; and a second mold which is inserted into the preform and which is provided with at least a cooling rod having an internal flow path for compressed air and a tip piece which is attached to a tip side of the cooling rod. The tip piece has a shape corresponding to a bottom of the preform and includes a mold surface that receives the bottom, and an opening formed on a base end side of the mold surface and communicating with the flow path of the compressed air. The post-cooling unit cools the bottom of the preform while pressing the bottom of the preform against the first mold with the mold surface of the tip piece, and cools a body portion of the preform while pressing the body portion against the first mold with the compressed air passing through the opening.