PROBLEM TO BE SOLVED: To provide a die hardly jamming molding materials at an extrusion port and capable of stably conducting molding processing.SOLUTION: A die 1 is arranged at a terminal of an axis direction X of a cylinder barrel 10, which has a screw 12, of an extruder 20 and has a flow channel 2 and an extrusion port 3 of a molding material M which is extruded by the screw 12. The die 1 has a flow channel reduction part 4 of which cross section area S of the flow channel 2 is gradually reduced toward a downstream side of an extrusion direction X1 of the molding material M and a shape arrangement part 5 for passing the molding material M from the flow channel reduction part 4 to the extrusion port 3 and shape arranging the same to a prescribed shape. An inner wall face 4a forming the flow channel 2 of the flow channel reduction part 4 has a flow control part 41 which is a protruded curve toward an inside of the flow channel reduction part 4 in a cross section view along an axis direction X.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】押出口に成形材料が詰まり難く、成形加工を安定的に実施し得るダイスを提供すること。【解決手段】ダイス1は、スクリュ12を内蔵したシリンダバレル10を具備する押出成形機20の該シリンダバレル10の軸方向Xの一端に配されるもので、スクリュ12によって押し出される成形材料Mの流路2及び押出口3を有する。ダイス1は、流路2の断面積Sが成形材料Mの押出方向X1の下流側に向かって漸次縮小する流路縮小部4と、該流路縮小部4から押出口3に向かって成形材料Mを通過させながらこれを所定形状に賦形する賦形部5とを具備する。流路縮小部4の流路2を画成する内壁面4aは、軸方向Xに沿う断面視において、流路縮小部4の内側に向かって凸の曲線である流れ制御部41を有する。【選択図】図2
