| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for producing a thermoplastic resin pre-expanded particle producing a uniform thermoplastic resin pre-expanded particle with less variation in bulk expansion ratio.SOLUTION: The apparatus for producing a thermoplastic resin pre-expanded particle includes: a foaming tank having stirring parts provided in multistage onto a rotating shaft inserted in the tank and fixed parts provided in multistage on the wall of the tank so as not to come into contact with the stirring parts; and heating medium supplying pipelines supplying heating medium into the tank; wherein spouts for the heating medium and the heating medium supplying pipelines connected thereto are provided for one or both of the stirring parts and the fixed parts, the heating medium supplying pipelines have a first heating medium supplying pipeline which supplies the heating medium from the bottom to the inside of the foaming tank, and a second heating medium supplying pipeline which supplies heating medium into the heating medium supplying pipeline in the tank, and the amount of the heating medium to be supplied to the first and the second heating medium supplying pipelines can be controlled. |
