| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for stretch blow molding capable of intentionally forming a thin wall part at a predetermined position part of a bottom wall of a bottle-shaped container, and to provide a spouting container capable of using up a content liquid to the end without worry about the attitude or the like of the container. <P>SOLUTION: On a preform in which a thickness deviation part with a relatively thick wall or thin wall condition is formed at a predetermined position part of a bottom wall, by utilizing a difference of cooling or heating speed in a temperature adjusting step of adjusting the temperature to a suitable temperature for an injection molding step or stretch blowing step, a high temperature spot is formed in the thickness deviation part. By utilizing a deviated stretch property of this high temperature spot, the high temperature spot is stretched and deformed into a relatively thin wall. Thereby, the thickness of the bottom wall of the bottle-shaped container is convergently thinned toward the predetermined position part, and the inner face of the bottom wall is molded so as to be inclined downward convergently. An accumulating spot into which the content liquid remaining near the inner face of the bottom wall flows and accumulates convergently is formed in the vicinity of this predetermined position part. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
