16-cavity Hot Runner Injection Mold

16-cavity hot runner injection mold is a high-volume production tool that produces 16 identical plastic parts per cycle. The image shows the large mold with two halves, multiple cavities, and a hot runner manifold system.

Hot Runner System

In a hot runner mold, the runner system is heated continuously so that the plastic in the runners remains molten. When the mold opens, only the finished parts are ejected — there is no runner scrap to separate or recycle. This saves material and shortens cycle time. A manifold distributes molten plastic from the injection machine nozzle to 16 individual nozzles.

Advantages

• 16 parts per cycle for maximum output.

• No runner scrap — 100% material efficiency.

• Faster cycle times (no runner cooling required).

• Consistent part quality across all cavities.

• Automatic parts separation — no degating needed.

Applications

16-cavity hot runner molds are used for high-volume production of bottle caps, preforms, caps and closures, syringe plungers, small connectors, and disposable plastic items. They run on large injection molding machines with fast cycling robots.

Mold Construction

The mold is built in a robust die set with precision cavity inserts. Temperature-controlled hot runner nozzles maintain melt temperature at each gate. Cooling channels surround each cavity for fast solidification. Ejector plates are synchronized to release all 16 parts simultaneously.

Conclusion

The 16-cavity hot runner injection mold is a high-capital, high-output tool for mass production. The hot runner system eliminates material waste and maximizes parts-per-hour for packaging and disposable plastic products.