| 摘要 |
<p>In a method of drawing an injection-molded preform by a drawing bar in the direction of the axis, and blow molding it in a hollow product, such as a container having a predetermined shape in a blowing mold, some of the blowing air is recollected in a working air tank after being used at low pressure, arranged separately from a blowing air tank at high pressure, and making selecting valves to work in a circuit, the recollected air being utilized for a part of the working air to be used in an air cylinder to make units related to drawing-blowing molding by air cylinders to function, to diminish availability of an air recollection-compressor utilized, and so it is possible to diminish required cost for comprised air and to diminish exhausting noises.</p> |
