| 摘要 |
Co-extrusion mould for extruding plastic material in the form of a tubular film, the mould comprising feed devices 2 for separate delivery of at least two plastic materials to the said mould, a distributing duct system coupled to each feed device, each distributing duct system comprising at least two curved ducts 24, 25, 26, which have been arranged in separate axial planes, the ends of each curved duct 24, 25 being coupled to the centre section of the following curved duct 25, 26 and the distribution duct systems being situated at different distances from the mid-axis of the mould, collecting chambers 18-20, which are connected to the said distributing duct systems, and an annular extrusion slot 5, which is connected to the collecting chambers 18-20. <IMAGE> |
