| 摘要 |
PURPOSE:To enable to easily change the number of layers of a laminate sheet or the constitution of the layer by a structure wherein a flow passage distributing plate is exchangeably arranged between a composite adapter and conduits so as to exchange the plate properly. CONSTITUTION:Molten resins extruded from three extruders 25, 26 and 27 pass through conduits 28, 29 and 30 respectively so as to reach the resin inlets of an adapter 24 in order to flow in through resin flow passages. After that, said resins pass through the respective receiving ports of a flow passage distributing plate 23 so as to be distrib uted among five resin flow passages in order to flow in the five flow passages 54a-54e in a composite adapter 22. The resultant flowed-in resins enter flow passages 5a, 55b and 55c and are laminated to one another in three layers at the meeting point 56 of the passages 55a, 55b and 55c and past through a resin passage 77 and flow in a resin passage 58 formed at the center of an inserter 51. At this time, the molten resins flowed in the resin passages 54a and 54e enter resin passages 59a and 59b so as to meet the laminated resins extruded from the central resin flow passage 58 at a meeting point 60 in order to be laminated in five layers. The resultant laminated resins flow through a flow passage 61 into a T-die 21 so as to be uniformly spreaded breadthwise by pressing in the T-die 21 in order to be extruded in the form of a 5-layer sheet. |
