The connection and difference between gravity casting and sand casting are the s2020-04-23 00:00:00
In the previous article, we have analyzed the difference between gravity casting and pressure casting. In order to understand more comprehensively, we also need to look at the connection and difference between gravity casting and sand casting, so as to lay the foundation for future applications. . The article is relatively short, so everyone can take a look.
Regarding gravity casting, many people are already familiar with it. It is a casting process under the action of the earth's gravity, which contains many types, so the important thing to understand is the knowledge of sand casting.
Sand casting, sand casting, must be a traditional casting process with sand as the main modeling material. Most of the sand molds are made by gravity casting. Low pressure casting and centrifugal casting can also be used if there are special requirements. And the applicability of sand casting is very wide, no matter what size, complexity, number, etc., this process can be used.
Sand casting also has access to molds. Traditional molds are made of wood, but there are many drawbacks, so they have been gradually eliminated. Instead, aluminum alloy molds or resin molds with higher dimensional accuracy and longer service life are used. Although the price rises slightly, the effect is very good.
However, sand casting has some shortcomings. For example, since each sand mold can only be used for pouring once, it will be damaged after the casting is produced, so it has to be recast, the resulting work efficiency will be much lower; and the sand itself is soft and porous. , So the dimensional accuracy of castings will be reduced, and the surface will look rougher But I believe that with the continuous advancement of technology, these shortcomings can be overcome, and the processed products will be more perfect.
