The invention discloses a mold opening and closing structure for plastic waste recycling and a hollow blow molding machine, comprising: two movable molds capable of combining into a complete mold; an opening and closing control part capable of opening and closing the two movable molds; an expansion part arranged at the adhesion position between the two movable molds and the hollow plastic product. In the invention, the hollow plastic product adhered to the movable molds is pushed away from the adhered movable molds by the bulging of the expansion part, which is different from the hard ejection and separation mode of ejector pins made of hard materials. The adhesion area between the adhered hollow plastic product and the movable molds is gradually reduced until the adhesion force between the hollow plastic product and the movable molds cannot support the gravity of the hollow plastic product, then the hollow plastic product falls down to replace the traditional hard ejection and separation mode through the ejector pin structure, prevent the hollow plastic product from indentation, and protect the integrity of the hollow plastic product.
Country Code: CN
Application Number: CN202410493717.8
