| 摘要 |
The invention describes a forming device (3) for an extrusion plant (1) having at least one calibrating device (9) comprising at least one calibration tool (24 to 27) having a plurality of calibration dies (29 to 37), arranged one after the other in an extrusion direction (7), having at least one calibration orifice (38) with several forming surfaces. The calibration dies (29 to 37) have end faces (43, 44) spaced at a distance apart from one another in the extrusion direction (7). At least one cavity (51) is formed between at least two immediately adjacent calibration dies (29 to 37) extending from the forming surfaces through to a passage and the cavity (51) is open across a predominant part of the periphery of the calibration orifice (38) towards the calibration orifice (38) bounded by the forming surfaces.
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