The utility model discloses a stretching rod for blow molding machines, including a rod body. Air holes are opened on the outer wall of the preform insertion section, and fixing holes are arranged at the end. A movable joint is movably connected to the rod end, and a fixing rod is fixed on the joint. An air blowing valve interface is arranged at the outer end of the rod body, and a check valve is sleeved on the outer wall. The hollow rod body and air holes realize internal cooling while stretching preforms, greatly shortening cooling time and improving production efficiency. Internal cooling avoids warpage and deformation of products, increases yield and reduces production costs.
Country Code: CN
Application Number: CN202122596792.1
