Simulation and experimental study on the Fenotec casting method of the engine block RV95

Abstract

The new designs or new materials used in foundries for sand casting products in Vietnam now often rely on experience and adopt the try-to-fix method to gradually find the best implementation. This method is very time-consuming, and the product is often unsatisfactory in the first many castings. This study developed a casting simulation model to compare experimental and simulated results using the Fenotec molding technology for the RV95 engine body. The 3D simulation model that was used to simulate the casting process with the same boundary conditions as the experiment also gave similar results. The results show that when making new castings for the first time from experience, there are many casting defects such as cracking, metal deficiency, porosity, etc. In order to improve the casting results, the pouring gate, the arrangement of additional risers and the size of the runner were studied on the simulation to improve the defect results on the casting. After that, the parameters in the simulation model used in the experiment reveal that the molded product meets the required quality and no longer has defects. This molded product, after checking the mechanical and geometric parameters, can be put into mass production

Adaptive method of estimating the dynamic characteristics of the bottom pressing process when making disposable casting molds

“…It is important to note that, despite the promising expectations from 3D simulation modeling in relation to the prevention of casting defects [8], not taking into account the technological conditions of compaction will not live up to expectations. This is due to the fact that under-or over-compaction of the mixture will lead either to a violation of the geometry of the castings, in the first case, or to the formation of gas porosity, in the second case.…”