国外热塑性塑料波纹管挤出机头

过对国个一些大所研制的各种波纹管挤出机头的研制情况分析，得出了弹性螺塞结构型式的机头和旋转机头比较实用，同时在设计波纹管的机头时，主要以管机头和是缆挤出机头的为基础，正确选择进料角和成型模具的尺寸，从而使机头结构更趋合理。

Extruder Head of the Corrugated Duct Made Abroad for Extrusion of Thermoplastic Plastics

Through analyses of the corrugated duct extruder heads of all kinds produced, as well as their developing situation, by some large companies abroad, a conclusion is drawn in the paper, that the extruder head of the elastic cock type and the one of spinning type are very much practical in use. At the same time, the paper lays stress on the designing of extruder head of corrugated duct that must be based upon the duct head and the cable extrusion one. If the angle for raw material feed in and the sizes of the forming model are to be right and exact selected, the structure of the extruder head will be still much reasonable.