Views: 0 Author: Site Editor Publish Time: 2023-03-08 Origin: Site
Sand casting is a widely used casting mold. As the name implies, the mold is made of sand. sand casting requires placing a finished part model or wooden model (pattern) in the sand, then filling the sand around the pattern and removing the pattern from the box to form a mold.
What is the future of sand casting with 3D printed molds and cores?
What is the relationship between sand casting and industrial 3D printing?
What raw materials are available for sand casting?
Molds are destroyed to remove metal parts after sand casting is complete, and the metal parts can then be reworked for easier and simpler operations.
3D printing technology is changing the face of metal casting. 3D sand casting printing enables design and manufacturing engineers to produce optimized large parts with complex geometries, minimize internal material defects by optimizing mold design, and enable a leaner, more flexible manufacturing supply chain.
Metal casting is a common and established manufacturing process for producing goods that are integrated into our daily lives. Today, 90% of all manufactured products and machines use castings. The most popular metal casting process today is sand casting; over 70% of all metal parts are made using this production process.
The sand casting process begins with the production of a sacrificial mold, which consists of compacted sand mixed with a binder. The cavity of the mold is filled with molten metal using a casting system, and the mold is then broken to remove the casting.
In order to ensure the quality of sand casting, dry cores are generally used in sand casting. According to the different binders used in the core, the core is divided into clay sand core, oil sand core and resin sand core.
1 . Clay-sand core
Simple cores made of clay sand.
2 . oil sand core
Core made of core sand with dry oil or semi-dry oil as binder is widely used. The viscosity of the oil is low, and the mixed core sand has good flowability and can be easily compacted during core making. However, the strength of the newly produced core is very low. Generally, it is supported by a profiled core plate and then baked in an oven at 200 to 300 ° C for several hours, and the oil is oxidized and hardened by air. The disadvantage of this core making process is that the core is easily deformed during demolding, handling and firing, which will reduce the dimensional accuracy of the casting; long baking time and high energy consumption.
3. water glass sand core
Sand cores made of water glass as a binder can be divided into the following types: Ester-hardened water glass self-hardening process and water glass methyl formate cold core box process.
FHZL will continue its efforts to refine and innovate 3D printing technology to accelerate the transformation and modernization of traditional foundries.
