Resin coated sand casting has a long history in the field of casting, and the output of casting is quite large, but there are many problems when using resin coated sand casting to produce precision steel castings, such as sand burn, cold shut, and air hole. How to solve these problems remains to be explored.
Awareness and understanding of coated sand (coated sand belongs to organic binder, core sand)
- Resin coated sand is characterized by proper strength, good flowability, clear profile of sand mold and sand core, compact structure, being able to make complex sand core, good surface quality of sand mold (core), and up to Ra 6.3-12.5 M in Surface roughness The dimensional accuracy can reach CT7 ~ CT9, collapsibility is good, the casting is easy to clean.
- The scope of application: Resin coated sand can be used as both mold and core. Resin coated sand can be used with each other and with other sand molds (cores) ; not only can it be used in metal mold gravity casting or low pressure casting, it can also be used in sand-lined iron mold casting and thermo-centrifugal casting, not only in the production of cast iron and non-ferrous alloy castings but also in the production of steel castings.
Benefits of Resin Coated Sand
- Castings can be produced with close tolerance and with very minimum machining allowances along with excellent surface finish.
- Self life of the resin coated sand is unlimited.
- Hollow cores can be produced.
- Lump free sand.
- No crack of core or shell.
- High transverse strength.
- Low density of Resin Coated Sand gives maximum output.
- Less core weight.
- Release agent gives maximum output without breakages.
- Fast curing of Resin Coated Sand gives high production with uniform baking of sand.
- Special fine Resin Coated Sand doesn’t require refractory coatings or core paint, achieves better surface finish.
- Low rate of gas generation.