A die head for a hollow blow molding machine comprises a center rod, a material pushing mechanism, a distribution mechanism and a core rod device. The core rod device comprises an inner core, an outer core, a core mold and a die, the die is sleeved outside the core mold, the inner core is seated on the core mold, the outer core is sleeved outside the inner core, two outer spiral flow channels are arranged on the outer core, and two inner spiral flow channels are arranged on the inner core. The two outer spiral flow channels are symmetrically wound at 180° on the outer core, the two inner spiral flow channels are symmetrically wound at 180° on the inner core, the winding angle of each spiral flow channel is 360°, and the depth of each spiral flow channel gradually becomes shallower from the distribution point. The present utility model is provided with double-layer spiral flow channels, thereby avoiding the degradation and blackening of the melt; the other part of the melt flows down to the material storage cavity along the walls of the inner and outer cores, which can ensure that the melt flows down at 360° and makes the melt fuse uniformly.
Country Code: CN
Application Number: CN201520230400.1
