02 11月 Casting Bush
Casting Bush is one of the more important parts before molten aluminum enters the mold.
Hot-top casting refers to a casting method in which there is a section with good heat preservation performance on the top of the mold, which is used to slow down the primary cooling of the upper part of the mold, rather than slow down the primary cooling of the entire mold.
Hot top ingot casting refers to the process of semi-continuous ingot casting of aluminum alloy using a mold with a thermal insulation layer on the upper part.
This ingot casting process is usually to install a liquid storage tank made of refractory heat insulation material on the upper part of the aluminum alloy semi-continuous ingot mold, or to evenly line the upper part of the inner surface of the ordinary mold with a layer of flexible heat insulation The heat-insulating zone made of material, whose function is to keep the melt at a higher temperature when it enters the mold part through the funnel.
Casting Bush is one of the more important parts of the hot top casting platform.
The mold for hot top ingot casting is composed of a hot top part with heat insulation and an uninsulated part that can solidify and crystallize the melt.
The hot top part not only keeps the melt warm, and always maintains a liquid column on the upper part of the ingot, giving a certain static pressure to the melt that is about to solidify and crystallize, and at the same time, reduces the solidification position of the melt in the crystallizer.
The height of the solidified crystalline part is generally between 20-50mm, which is used to crystallize and shape the melt.
The use of hot top ingot casting can realize stable short crystallizer ingot casting and the same level of ingot casting technology, that is, the funnel is eliminated, and the melt transfer adopts the horizontal liquid supply method, and the quality and production efficiency of the ingot are improved.
The hot top ingot has uniform structure, good mechanical properties, smooth surface, lighter anti-segregation, and reduces the amount of milling chips and metal loss. At the same time, the hot top ingot casting method simplifies the production process and improves the labor environment.