The type of sand casting
1. Green & Resin Sand Casting
Green sand casting offers a cost-effective route and is the most traditional sand casting process. This renders it a common choice amongst manufacturers and project leads. The material used is sand that’s bonded by water and clay—and best of all, it’s recyclable.
In the resin sand casting process, resin and sand are first mixed. Following that, the mixture is self-hardened through a chemical reaction to produce exceptionally hard molds.
2. Lost Foam Castings
Lost foam casting is another investment casting method that differs from lost wax casting. The Lost Foam casting process was first started in year 1958 when H.F. Shroyer was granted a patent for a cavity-less casting method, using a polystyrene foam pattern embedded in traditional green sand. The polystyrene foam pattern left in the sand is decomposed by the poured molten metal. The metal replaces the foam pattern, exactly duplicating all of the features of the original pattern. Like the water glass investment casting method, a pattern is required for pouring in casting, because it is evaporated (“lost”) in the process.
3. Shell Mold Sand Casting
Shell mold casting is a metal casting process similar to sand casting, in that molten metal is poured into an expendable mold. However, in shell mold casting, the mold is a thin-walled shell created by applying a sand-resin mixture around a pattern. The pattern, a metal piece in the shape of the desired part, is reused to form multiple shell molds. A reusable pattern allows for higher production rates, while disposable molds enable complex geometries to be cast.
Sand Casting Part
Sand casting process
This multi-step procedure involves the following actions:
Producing the mold
Automated equipment is used to create the models around which the sand will be compacted to form the mold.
Melting and pouring
The metal or alloy to be used in the component is melted down and poured into the compacted sand mold. Once the molten metal cools and solidifies, it takes the form of the surrounding mold.
Cooling the metal
The molten must completely cool and harden before the surrounding sand mold can be opened.
Removing the cast part
The surrounding sand is removed once the metal has fully hardened to reveal the newly cast component.
Trimming the component
Any excess material is trimmed to ensure that the component takes the desired finish and shape.
Finishing the metal
Customers can incorporate additional treatments and processes to add special features or look at their newly cast metal components to make them ready for assembly.
The advantage of sand casting
Sand casting in general offers numerous advantages over other casting processes. With minimal restrictions on the shape, size, and materials used in manufacturing, it can be used to create specialized prototypes and mass-produced components alike. Its versatility also extends to the number of parts it can produce at one time since it’s suited to both low- and high-volume production runs. Because of its lower production costs, it’s much more cost-effective than other casting processes, as well.
Since 2008, Hai Xin Nuo has provided high-precision, high-quality casted metal components for customers across industries. Our talented team of experts has extensive experience with a variety of casting processes––including sand casting––ensuring that we can provide any client with accurate, reliable, and consistent casted parts for use in a wide range of applications. Regardless of your needs, we’re here to supply you with a durable and efficient solution to your operational challenges.
CMM Testing Equipment
Hot Tags: sand casting parts, China sand casting parts manufacturers, suppliers, factory, Stainless Steel Casting Foundry, precision castings, precision die casting, precision die casting, aluminum precision casting, precision cast parts inc
