In many projects, IML and IMR are introduced as surface finishing upgrades. Better appearance.Improved durability.Elimination of secondary printing. Technically accurate. But in injection molding, IML injection molding and the IMR process are not simply decoration choices. They fundamentally change how the entire production system behaves. When in-mold decoration becomes part of the molding cycle, it reshapes: Projects rarely struggle because decoration is difficult.They struggle because decoration is treated as cosmetic — instead of structural. What Are IML and IMR in Injection Molding? IML (In-Mold Labeling) and IMR (In-Mold Roller Decoration) are both forms of in-mold decoration integrated directly into the injection molding process. In IML injection molding, a pre-printed label is inserted into the mold cavity before injection. The molten plastic bonds to the label during molding. In the IMR process, a continuous decorative film transfers ink onto the part surface during injection

Stack molds in injection molding are often described as a way to double output without adding more machines. In theory, that statement is correct. In practice, the decision to use a stack mold is far more complex. At CINDY MOULD, we view stack molds not as a shortcut for productivity, but as a long-term production strategy. When properly engineered, a stack mold can significantly improve injection molding productivity and reduce cost per part. When poorly evaluated, it can introduce instability, excessive maintenance, and unnecessary capital risk. Understanding the difference is critical. What Is a Stack Mold in Injection Molding? A stack mold is a multi-level injection mold that contains two or more cavity layers within a single mold base. Unlike a traditional single-face mold, a stack mold produces parts on multiple parting lines during one injection molding cycle. In most configurations: The concept is straightforward. The engineering is not. Because the projected area effectively