Stack Moulds: High Performance and Space Efficiency
Stack moulds are designed to produce simultaneously on two parting lines, considerably increasing productivity without changing the size of the injection molding machine.
The hot block is integrated into the central part of the mold, allowing balanced injection on both levels.
Applications possible
- Food packaging (with the possibility of integrating IML)
- Closures
- Medical and pharmaceutical parts
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FAQ
Stack moulds
The main advantage of a stack mould is to increase productivity without modifying the injection molding machine. It enables a large number of parts to be produced per cycle, with a limited footprint.
It is also compatible with high production rates, while maintaining consistent quality on both levels. This mold optimizes the ratio of investment to production volume, and reduces the unit cost of parts.
Stack moulds are ideally suited to high-speed sectors such as food packaging, cap manufacture and medical or pharmaceutical parts.
They can also integrate advanced functions such as IML (In-Mold Labeling) for decorated packaging. Their structure enables them to meet mass production requirements, while maintaining precise molding quality on functional or decorative parts.
Yes, some SIMON-designed stack moulds can incorporate IML (In-Mold Labeling) technology. This enables a label to be inserted directly into the molded part, during the injection cycle.
This integration is ideal for high-end or promotional food packaging, combining production speed with a polished visual appearance. SIMON adapts the mold design to your automated labeling needs.
The quality of parts injected on a stack mould depends on balanced material distribution and controlled cooling on each parting line.
At SIMON, we use injection simulation software, high-precision machining and real-life testing to validate part regularity and repeatability.
This means that every impression - whether on the upper or lower parting line - meets the same dimensional and aesthetic criteria.
Discover SIMON’s Expertise
We develop custom injection molds for complex and high-volume applications.
Moulds
Responds to high production volumes. Increased productivity & optimized part price.
Moulds
Ultra-fast cycle times, precision centering and the ability to produce and decorate packaging at the same time.
Moulds
Double the output while maintaining the size of the injection molding machine.
Moulds
Ideal for technical or tight plastic threads. Electric unscrewing to guarantee precise release and repeatability.
Inserts
Industrial flexibility thanks to the possibility of using a single base mould for several cavity sizes.
