Views: 1 Author: Site Editor Publish Time: 2020-12-08 Origin: Site
Sand casting, also known as sand casting, is a metal casting process that uses sand as the mold material. The term "sand casting" can also refer to objects produced by the sand-casting process. Sand castings are produced by specialized foundries. More than 60% of metal castings are produced through sand casting processes.
The following knowledge points are listed below:
What is sand casting?
Advantages of sand-casting parts
How dose sand casting done?
The product made by sand casting process is called investment casting part.
Molds made of sand are relatively inexpensive and are sufficiently fire-resistant even when used in foundries. In addition to sand, a suitable binder (usually clay) can also be mixed with sand or present. The mixture is usually wetted with water, but sometimes other materials are used to wet the mixture to enhance the strength and plasticity of the clay and make the aggregate suitable for molding. The sand is usually contained in a system of frames or molded boxes, which are called flasks. In the cavity and gate system, the pattern is created by compacting the surrounding model called sand, by directly engraving into the sand, or by three-dimensional printing.
One of the most common metal casting processes is sand casting. In this process, the mold has sand and clay components. Clay is a binder mixed with sand. The mold is then compacted into a three-dimensional pattern.
Sand casting is a common product for metal parts of different sizes. We are not only proud of its versatility, but also the introduction of sand casting. And do you know the details of the casting process? Sand casting process is also an ideal choice for casting metal alloys.
The following are three main advantages of molding sand:
Easy to recycle
It can withstand high temperature
We have successfully used sand casting in various metals with high melting temperature, such as nickel, steel and titanium. Due to its low cost, flexibility and heat resistance, sand casting is also used in other industries.
1: Production pattern-required product
The process utilizes a reusable pattern that has the same details as the final part required. There is a margin for thermal shrinkage or shrinkage.
2: Modeling-Ram and Riser: Metal Conveying System
3: Create the mold
4: Pour the metal into the mold
The molten metal is poured directly into the static mold. It fills the cavity that defines the finished part and riser. The riser provides the liquid metal available for the casting. Since they are designed for final cooling and curing, shrinkage and potential voids are concentrated in the riser rather than in the required section.
The casting (including the required parts and other metals needed to make it) will solidify and cool. The sand was broken in the process of breaking.
Much of the sand used to make the molds is captured, repaired and reused.
6: Final assignment
Cut out gates, runners and risers from the castings, and if necessary, perform final post-processing sandblasting, grinding, etc. to finish the castings according to the size. Sand castings usually require at least some additional processing to reach the final size or tolerance.
The parts can be heat treated to improve dimensional stability or performance.
You can also perform non-destructive testing. This may include fluorescent penetrants, magnetic particles, radiography or other inspections. Finally check the size.
The sand casting process is a universal and well-known process. Over time, process improvements have made sand casting the preferred process for many industrial markets.
As with most material and design decisions, discussions with metal experts can help make the best metal decisions. For new designs, this is a conversation, and it is best to proceed as early as possible to optimize manufacturability. However, even applications that use metal components in the same way for a long time can be evaluated to provide higher performance or more economically convert to a different process.