Insufficient attention to the basic research work of lost foam casting technology, too little investment and low level have become hidden dangers and crises for the further industrial application of technology. At present, there is a widespread guiding ideology of eager for quick success and instant benefit, including some research institutions and colleges and universities. They are busy undertaking profitable engineering projects, and do not pay attention to the research of key technologies. They spend too little energy on some important basic research work. Therefore, the basic research of the whole lost foam casting is very weak.
The factory hopes to buy ready-made technology with money in the spirit of “taking it from the owner”. However, the product objects vary greatly. When adopting lost foam casting technology, each has its own technical keys and difficulties. Advanced process demonstration and even necessary process tests for products are indispensable. Unwilling to pay in this regard, it often leads to long-term difficulties and no timely return on investment after the completion of the production line, Even because the product object is not suitable for lost foam casting method, it leads to failure. In this regard, the experience of advanced industrial countries can be used for reference. For example, in 1989, the U.S. Department of energy organized a joint group to systematically study the pyrolysis characteristics of foamed plastics, the filling and solidification characteristics of metals, and the filling and compaction of dry sand, and achieved good results. In order to demonstrate the feasibility of adopting lost foam casting for the aluminum alloy cylinder block of the plant, Volkswagen AG organized the research institutions of 9 colleges and universities to invest 6million marks, and obtained valuable data and conclusions, which laid a solid technical foundation for the design and construction of lost foam casting production line.
The development of lost foam casting Technology in China needs to solve the following problems: the development of coating performance testing instruments, the standardization and commercialization of coatings for steel, iron and aluminum alloy castings, the development of high-efficiency shaking table and the study of dry sand compaction characteristics, the study of liquid filling and solidification characteristics of aluminum, iron and steel metals (including physical testing instrument methods and computer numerical simulation, software development and commercialization), Research on the formation mechanism and elimination measures of defects such as porosity and leakage of aluminum castings, carburization and hydrogenation of steel castings, wrinkle skin of iron castings, model size change law and accuracy control, research on composite process of lost foam casting and low-pressure casting, cad/cam and rapid manufacturing technology of tooling molds, and Research on exhaust gas purification methods and devices in lost foam casting workshop.