本发明公开一种消除合缝线的管材模头，由进料口、尾模套、分流锥、动态分流筋、分流支架外环、分流支架内环、调节环、压板、口模、芯棒、增压环等构成。动态轮、支撑筋、轴承和电机一起组成动态分流筋；动态分流筋固定在分流支架上；电机带动动态轮转动，熔体流经动态分流筋时，随着动态轮的转动熔体分流后会快速汇合；经过分流支架后有一个微微凸起的增压环，给刚汇合的流体施加一定压力，提高合并效果同时起到均化的作用。本发明在分流支架处提供了一种动态热机械作用并及时增压合并，能很好的消除管材挤出时合缝线，使管材密实度增加，力学性能大幅度提高。

The invention discloses a tubular product die head capable of eliminating a joint line. The tubular product die head is composed of a feeding hole, a tail die sleeve, a spure sperader, dynamic flow distributing ribs, a flow distributing bracket outer ring, a flow distributing bracket inner ring, an adjusting ring, a pressing plate, a mouth model, a mandril, a pressurizing ring and the like, wherein a dynamic wheel, a support rib, a bearing and a motor jointly constitute the dynamic flow distributing ribs; the dynamic flow distributing ribs are fixed on a flow distributing bracket; the motor drives the dynamic wheel to rotate; when melt flows through the dynamic flow distributing ribs, the melt is rapidly converged after flow distribution along with rotation of the dynamic wheel; and afterthe melt passes through the flow distributing bracket, the slightly bulged pressurizing ring applies certain pressure to just converged fluid, so that the converging effect is improved and the homogenization function is also expressed. Dynamic mechanical action and timely pressurization and convergence are provided at the flow distributing bracket, so that the joint line when a tubular product isextruded can be better eliminated to increase the compactness and greatly improve the mechanical property of the tubular product.