The ultimate goal is the task for the Lost Foam industry provide computer models that can be used to minimize start up times for introducing new products in production and provide designers predictive tool to help with the process. Questions would existing product production also benefit from the predictive tool. Some computer models current and change in the level of physics used, based on the current understanding of metal replacement / pattern.
The task extends the current level of understanding on the exchange metal / pattern with the intention of improving the computer codes. Accurate physical model is the exchange metal / pattern critical to the success of a computational model. Previous research showed the metal instead of the pattern by melting and gasifying the gas to escape into the surrounding coating and sand through the front gap between the metal and the reversal pattern. Calculations prove that this is not possible because the necessary amount of gas escape gap allow too big to heat transfer sufficient to provide for metal velocities known to cultivate.
Later research provided an answer to this dilemma, indicating that the gas can escape through the permeability pattern ahead of the metal front. Unfortunately most of the modeling of two phase flow is complex and there are currently no commercial codes to do with the level of complexity. Research by Technology1 Metal Casting (MCT) increase the understanding of the physical events that occur as the metal instead of the pattern. The results of their proposed research on the physical model shown in Figure 1.1.1. Liquid pyrolysis products are deposited on the shield behind the metal front in globules form where they are heated and vaporized by the metal and then escape through the coating as a gas.
The features of the model has been incorporated in the model shown in Figure 1.1.2. It is important to understand that the permeability pattern over the permeability coating, allowing the metal to finger his side causes multiple blended cause folds and porosity. Ann This condition where the surface pattern is not fused properly. This condition is discussed later in this report.