Oerlikon HRSflow says the patent-pending design allows the use of smaller injection molding machines while still promising the high output a stack mold tool.
Hot runner manufacturer Oerlikon HRSflow has designed a patent-pending compact stack mold for thin wall packaging applications. Designed to withstand high filling pressures for thin wall packaging applications, the system, which will be available soon, can be run on lower tonnage injection molding machines and is equipped with the company’s Xd nozzle series. ODM Cosmeic Packaging
The design fits a maximum hot half plate thickness of 220 mm with a minimum distance between the gates on either side of the plate of 260 mm. In a video released with the announcement, Oerlikon HRSflow showed a four-drop design molding two 210-ml single-serving cups in recycled PP with a weight of 6.3g and a wall thickness of 0.3 mm on either side of the middle plate. What Oerlikon HRSflow calls a “mosaic” design on the cups’ walls was patented by moldmaker Collomb and imparts robustness to the container despite the thin walls.
The center plate of Oerlikon HRSflow’s stack mold fits a maximum hot-half plate thickness of 220 mm. Photo Credit: Oerlikon HRSflow
Sustainability and the Circular Economy are both a challenge and an opportunity to flexible packaging producers. Recyclable pouches based on all-PE multilayer structures, utilizing new resins and perhaps techniques like MDO or biaxial orientation, appear to be major contenders against glass, metal, and multi-material film structures.
Nova’s new biaxially oriented HDPE is seen as a more easily recyclable monomaterial contender versus multilayer BOPP or BOPET films.
Many conditions must be met to get the best wall distribution in a PET bottle. Skilled operators are, as always, indispensable.
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