Unscrewing mold with unique demolding mechanism that demolds internal thread or protrusion by opposite direction turning of core ,actuated with hydraulic cylinder , electrical motor or mold opening/closing force,which is the best way to form bottle cap series and small-length tube that are with inner thread and limited space inside.  Unscrewing molds are among the relative complex of all injection molds, which requires molder must be with considerable technical savvy and deeply experience to design, fabricate and maintain.In the last decades, a variety of methods for molding and unscrewing the undercut or threaded parts have been developed out and replaced the manual unscrewing operation of mold or low efficient thread machining options.

Common mold methods of unscrewing threads including:
1. Jumping thread.  (unscrewing undercut by enforced ejection.).
2. Split tooling.  (machining half the thread shape in each half of a split mold).
3. Rotary unscrewing(unscrewing mechanisms are consist of gear system or linkage mechanism actuated by hydraulic cylinder, servo motor or mold opening-closing force.).
4. Collapsible coring.(as showed in introduction of ‘Collapsible Cores Injection Molds’).

The methods above may present challenges to other mold makers but we’ve skillfully the core technical. Our tooling knowledge and experience are always evolving to meet technology development and customer’s needs. we ensure all type of unscrewing toolings work automatically with easily maintenance to increase your production efficiency.