The head of the large-scale hollow material blow molding machine separates the two functions of the storage head and the injection extrusion embryo of the extrusion blow molding machine, and is completed by the injection and plasticization organization. In this way, the head has the advantages of continuous head, which is easy to change color and material.

The results show that the high repetition accuracy of parison components, high plasticizing ability, short color changing and material changing time, and high strength of melt fusion joint zone are achieved. Extrusion blow large hollow material (i.e. plastic) hollow blow molding machine generally uses the storage type head, the internal structure is disorderly, and there are many parts. Therefore, according to the characteristics of the storage head, there are inevitably some defects, such as long time for color changing and material changing, and forbidden measurement accuracy.

The large-scale hollow blow molding machine is a comprehensive hollow blow molding machine, which combines the injection molding structure of the injection molding machine and the blow molding and clamping structure of the hollow blow molding machine. It absorbs and develops the respective advantages of the two kinds of machines.