Establishing New Rules for Coldbox Coremaking

摘要

When establishing a method for vent and blow tube placement in coreboxes, foundries must maximize productivity and minimize amine consumption. Previous studies relating to the tooling parameters of coldbox coremaking relied on establishing the total core weight prior to developing the guide-lines to be used for proper corebox tooling design. Total vent open area and blow tube area, which varied depending on whether the core was "chunky" or "rangy," were established using a supplied formula. The established formulas caused problems when a large core was to be produced. Instances existed when the vent open area needed was, according to the formula, greater than could be obtained due to insufficient surface area of the cope or drag portions of the corebox. Also, on some occasions, it was not possible to install enough blow tubes due to space constraints in the corebox lid.