It can be seen from the figure that China’s lost foam casting began in 1990. Compared with foreign countries, China’s lost foam casting production is relatively late. The figure below shows the change of China’s lost foam casting production from the initial stage of lost foam casting production to...
Auxiliary materials and aluminum alloy lost foam casting technology are the key research objects in the field of lost foam casting abroad at present, because foreign aluminum alloy materials are the main materials used in lost foam casting, such as some industrial developed countries, such as the United States,...
(1) Development history of LFC casting in China Compared with other casting methods, the research of magnetic mold molding in China began earlier. In 1970, China carried out basic experiments on the magnetic mold method, and then formulated the process scheme. As China’s research on magnetic mold molding is...
(1) Development history of foreign FMC casting The first place where the research on lost foam casting began was the United States. In 1956, the American H.F.Shiroyer applied for a patent. The casting method he invented was solid casting, that is, making parts with foam pattern, then making sand...
(1) Type of alloy used Aluminum alloy, nodular cast iron, gray cast iron, special cast iron, low carbon steel, ordinary carbon steel, special cast steel and stainless steel are the main alloys used in lost foam casting production in China. From the production practice, gray iron castings with high...
Compared with traditional sand casting, lost foam casting has many advantages. Its advantages are as follows: (1) High dimensional accuracy of castings Lost foam casting process, the casting is formed at one time. Because it does not need to take the shape as in sand casting, nor does it...
Generally, for the newly put into production lost foam Castings, engineers and technicians rely on experience to select pattern density, pouring temperature, negative pressure, coating and other parameters, and design the pouring system through repeated experiments and modifications, so as to finally complete a more reasonable casting process. However,...
As a key part of the whole machine, box casting has an important impact on the use of construction machinery, whether the product quality meets the technical requirements or not. Because the box parts have the characteristics of shell, groove, boss, diaphragm and so on, if the traditional sand...
It can be seen from the table that under the pouring temperature of 1420 ℃ and 1450 ℃, the mold filling time of negative pressure 0.04MPa, 0.05Mpa and 0.06mpa are 46.84s, 48.98s, 45.75s, 44.15s, 48.62s and 47.39s respectively. Other influencing factors remain unchanged. When the pouring temperature is constant,...
Many process parameters can affect the quality of lost foam castings. The process parameters of lost foam casting mainly studied in this paper include liquid metal pouring temperature and negative pressure. As for other parameters that can be selected from the relevant empirical values, their influence on the simulation...