The present utility model discloses an extrusion blow molding mechanism, comprising a blow pin. The blow pin is provided with an integrally formed sealing section and an extension section, the sealing section is located above the extension section. When the blow pin extends into the mold, the sealing section corresponds to the sealing part of the bottle neck, and the extension section corresponds to the extension part of the bottle neck. A first rounded corner, a transition section and a second rounded corner are arranged between the outer wall of the sealing section and the outer wall of the extension section. The outer diameter of the transition section gradually increases from the end close to the sealing section to the end away from the sealing section, and the outer diameter of the extension section is larger than that of the sealing section. By providing a step undercut on the blow pin, the bottle body blow-molded by the extrusion blow molding mechanism has better sealing performance.
Country Code: CN
Application Number: CN202321541934.7
