We are specialized in gravity casting. At this process, the aluminum melt is poured into the mold by gravity (unlike pressure die casting). Parts that feature complex shapes and have tough mechanical specifications, e.g. for pressure resistance, can be made with this technology. Gravity casting is the ideal casting process for important car parts, such as turbo charger components or housings of fuel injection pumps.
Automotive components with thick walls for high strength can be manufactured using this technology. By applying low pressure, aluminum melt is injected slowly into the mold from below. By applying the injection pressure until the aluminum solidifies, High quality parts can be produced with fewer blowholes.
The H-Process combines high dimensional accuracy and supreme mechanical properties of gravity casting with the low cost level of pressure die casting. A large number of parts can be produced in one pouring. Therefore, cost reductions can be achieved for automotive parts, such as turbo charger compressor housings, without compromising on quality.
Only NAIGAI masters this special aluminum casting process. The production development was supported by Japan’s Ministry of Economy, Trade and Industry (METI) and classified as a "strategic technology advancement support project".
In addition to gravity die casting we can also produce sand castings.
As the manufacturing of a mold requires a relatively high investment sand casting is an alternative for small volume production.
At the same time we use sand casting of prototypes before preparing our molds, during the development stage.
This assures the high quality at the time of SOP.