| 摘要 |
<p>The invention concerns a device and a method for continuous pressing of a plastically deformable blank (15) into a three-dimensional section with a predetermined cross-sectional area, comprising a substantially cylindrical, fixed die (10), an opening formed in the die (11), through which the plastic blank (15) is intended to be pressed, and at least one rotary die (12) arranged adjacent to the opening (11), the rotary die having one or more recesses in its peripheral surface for forming the blank, during the rotation of the die, into at three-dimensional section with transverse sectional parts. According to the invention, said rotary die (12) is arranged immediately downstream of said opening (11), whereby the blank is reducible, when passing through said opening, substantially down to said predetermined cross-sectional area, and formable, when passing said rotary die (12), thereby determining the final shape of the three-dimensional section. Furthermore, the device is compatible with conventional extrusion machines in order to allow rapid switching of tools with no need for expensive production stop-pages.</p> |
