The microcellular core-back technique enables you to decrease the density of microcellular foaming parts.
The microcellular core-back technique triggers foaming by opening the mold at the end of the packing phase.
This feature is supported for the following mesh types:
3D
In the microcellular core-back technique the cavity is initially fully-filled. At the end of the packing phase, foaming occurs as a result of the drawback movement on the core side of mold. The core side of the mold is opened at the end of the packing phase when the skin layer has formed to the appropriate thickness, but the core is still hot and soft enough to foam. The mold opening amount is typically comparable to the cavity thickness. The quality of the molded part depends on the cell structure, and is controlled by the processing conditions, the delay time, and the core-back speed and core-back distance.
Microcellular Core-back Process