本发明涉及一种连接塑料挤出机与模头的过渡环,过渡环中间设有多个分流流道,所述分流流道包括沿轴向由内向外倾斜的外分流流道和沿轴向由外向内倾斜的内分流流道,内、外分流流道在过渡环上沿圆周方向依次交错分布。本发明将熔融物料的内部料流与外部料流进行互换,熔融物料在通过倾斜的内、外分流流道的 The invention relates to a transition ring connecting a plastic extruder and a die. A plurality of branch flow channels are arranged in the middle of the transition ring. The branch flow channels include an outer branched flow channel inclined axially inwardly and outwardly, From the outside to the inside of the shunt flow channel, the internal and external shunt flow in the transition ring along the circumferential direction of the staggered distribution. In the invention, the internal stream of the molten material is exchanged with the external stream, and the molten material passes through the inclined internal and external flow paths