| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus capable of achieving the crystallization of the neck part of a larger quantity of a preform to enhance productivity. SOLUTION: A neck part crystallizing apparatus has a feed passage 20 for feeding two rows of preforms 10 in parallel. First and second heating parts 60a, 60b for heating the neck parts of two rows of the preforms 10 to crystallizing temperature, a cooling part 64 for cooling the heated neck parts of two rows of the preforms 10 and a taking-out part 66 for taking out two rows of the preforms 10 after cooling are provided on the way of the feed passage 20. Two rows of feed members 30 for feeding the preforms 10 in a state receiving the body parts of the preforms 10 so as to expose the neck parts of them are provided to the feed passage 20. Two rows of cooling cores 96 inserted in the neck parts of the heated preforms 10 to cool the neck parts while shaping the inner surfaces thereof and two rows of releasing cylindrical members 98b coming into contact with the end surfaces of the opening ends of the neck parts when the cooling cores are pulled out of the neck parts to release the inner surfaces of the neck parts and the cooling cores are provided at the cooling part 64.
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