The present invention discloses a die head for a plastic hollow container extrusion blow molding machine, comprising a die head support mounted on a die head frame, on which a die head is fixed. The die head comprises a die head upper cover and a die head main body, in which a material storage cavity is arranged. The material storage cavity is communicated with a barrel through a die neck arranged on the die head upper cover, and an injection ring is slidably mounted in the material storage cavity and driven by an injection oil cylinder. The lower end of the die head main body is connected with an oral die, in the center of which a core die is arranged, and an annular extrusion port is formed between the core die and the oral die. The core die comprises a core die body and a core die rod, the core die rod is provided with an axially hollow hole, a push-pull rod is axially slidably mounted in the core die rod, the upper end of the push-pull rod is connected with a piston rod of an oil cylinder, and the lower end is fixedly connected with the core die body. A limiting device for limiting the extreme movement position of the push-pull rod is arranged between the core die rod and the push-pull rod. Products produced by using the die head have reasonable thickness at each part and high yield, and the distance between the oral die and the core die is reasonably adjusted to avoid sudden changes.
Country Code: CN
Application Number: CN201210474063.1
