| 摘要 |
The invention relates to a system and method for blowing hollow plastic bodies, minimising high pressure air consumption. More specifically, the invention relates to the production of containers by means of stretch-blowing using injection-moulded preforms. The inventive system comprises a stretch rod (9) which is provided with an inner channel (12) that is connected to a liquid inlet pipe. According to the invention, the aforementioned stretch rod is covered with an elsatomer liner (10) into which a liquid (14) is introduced with the mechanical action of a piston after the stretching and pre-blowing phase, such as to take on the volume of the pre-blown body before the commencement of the high-pressure blowing. Moreover, a non-return valve at the liquid feed point ensures that the liquid-filled liner (10) cannot be compressed. The invention is intended, in particular, for the production of bottles which are made from a thermoplastic material such as polyethylene terephthalate (P.E.T.). |
