| 摘要 |
PCT No. PCT/SE85/00253 Sec. 371 Date Mar. 5, 1986 Sec. 102(e) Date Mar. 5, 1986 PCT Filed Jun. 17, 1985 PCT Pub. No. WO86/00565 PCT Pub. Date Jan. 30, 1986.A method of producing a container of plastic material capable of being oriented and/or crystallized, in which a substantially tubular blank is, in at least two mutually consecutive and mutually separate shaping phases or shaping stages, reshaped into the container. The blank is reshaped into the container by mechanical forming elements (34,42) which stretch the material in the axial direction of the blank, and in the circumferential direction of the blank. By stretching the material in each separate shaping stage to a regulated degree, there will be accumulated in the material a total stretching corresponding to the requisite stretching in order to impart to the material the desired and predetermined orientation and thereby the requisite strength properties. |
