Because lost foam casting has many outstanding advantages, more and more foundry workers at home and abroad began to study lost foam casting in recent years. lost foam casting has low investment cost and short production cycle. It can cast castings with high precision and small machining allowance, which is very in line with the requirements of today’s industrial production for the development of precision, complexity and diversification of the casting industry. Through the unremitting efforts of lost foam casting enterprises and casting researchers, the current lost foam casting process can be applied not only to single piece and small batch production, but also to large batch automatic production. The lost foam casting process has been gradually improved abroad, producing nodular iron castings such as connecting rod, guide post and guide sleeve, and gray iron castings such as reducer, underframe and diesel casing.
Japan is also one of the countries that used the lost foam casting method earlier. Its lost foam casting method started in the 1960s, and the real application of lost foam casting method to produce castings was in 1984. Although it started later than European and American countries, it has invested a lot of human, material and financial resources in the research of lost foam casting method, so it has developed rapidly. Japanese researchers have carried out development and research from theoretical basis to actual production and then to new technology research and development. Up to now, their research results include “lost foam casting process under reduced pressure and vibration” and “in pattern process”.
By the end of the 1990s, Japan’s lost foam casting output caught up with some advanced technology countries in Europe and the United States, and ranked among the top in the world. Japan’s Morikawa company, the largest lost foam casting method application company in the world, has a monthly output of 800 tons.