| 摘要 |
The invention relates to a device for extruding plastic profiles, preferably plastic tubes, to which plasticized bulk plastic can be fed, and comprising a plurality of ring channels (5) combined by means of a flow conjunction (4) to a common melt channel (2). According to the invention, the tool (1) is divided into three functional areas, wherein the three functional areas are a distribution area (7), a cooling area (8), and a forming area (9), wherein cooling channels (3) are disposed about the ring channels (5) in the cooling area (8). The invention further relates to a method for extruding plastic profiles, preferably plastic tubes, comprising the following steps: a) feeding bulk plastic from one or more extruders into one or more infeed channels (6), b) wherein the fed bulk plastic is divided into partial flows in a distribution area (7), c) transport of the bulk plastic into at least two ring channels (5) located in a cooling area (8) of the tool (1), d) cooling the bulk plastic by means of cooling channels (3) disposed around the ring channels (5), e) joining the pre-cooled partial flows at a flow conjunction (4) to form an overall melt flow in a melt channel (2), f) forming the desired plastic product, g) feeding the formed plastic product into a cooling and calibrating station. |
