The utility model belongs to the technical field of hollow blow molding, in particular to a core rod of a die head of a hollow blow molding machine. The top surface of a first flow channel of the utility model is set as an arc curved surface, and a sharp part is formed at the connection between the arc curved surface and the surface of the core rod. When the core rod is matched with the inner hole of the die head body, the sharp part is connected with the inner hole wall of the die head body, so that the inner wall of the die head body and the top surface of the first flow channel realize a semicircular arc smooth connection, and an arc transition connection is formed between the top surface and the side surface of the first flow channel. When plastic flows in from the feed port of the die head body, it can smoothly flow along the inner wall through the arc curved surface. Compared with a right-angle flow channel, the plastic flows more smoothly and transitions more smoothly, avoiding plastic retention at the right angle, which not only accelerates the plastic flow speed, but also can directly replace plastics of different colors during product change, accelerates the color change efficiency of the equipment, avoids carbonization caused by material accumulation and the problem of black spots occasionally appearing in existing products, thereby improving the product qualification rate.
Country Code: CN
Application Number: CN202321331414.3
