Mold Components for Bottle Blowing Machines: Mandrel Heads

Stretch rod eccentricity or air pressure leakage during high-pressure blowing causes bottom punctures or wall thickness eccentricity, directly resulting in leakage and scrap of beverage and cosmetic packaging.

The core of eliminating this lies in head geometry and seal control: precisely setting the chamfer radius (R-angle) optimizes uniaxial tensile stress distribution to avoid stress concentration; meanwhile, controlling surface roughness within Ra 0.2, combined with a high-temperature FKM O-ring, completely locks the air leakage path at 30-40bar, securing a stable axial stretch ratio.

Molds and accessories compatible with blow molding machines, filling machines, and labeling machines of brands such as Sidel, Krones, KHS, and Tetra Pak.

The tail features a fine thread connection with specific tolerance bands, strictly matching the rod body to prevent loosening under thousands of high-frequency axial impacts per minute, enabling quick, adjustment-free replacement.

Submit your current line's bottom wall thickness eccentricity data immediately to get a custom R-angle matching solution and spare parts scheduling for your specific bottle.

Sidel®,Tetra Pak®, Krones®, and KHS® are registered trademarks of their respective owners. Jihengfeng Precision Machinery (Shanghai) Co., Ltd. is an independent manufacturer and is not affiliated with, authorized, or endorsed by these companies.