Keboer Coated Sand Process
Specializing in high-integrity,complex
castings in small to medium sizes

Engineer takes charge of the mold process design work, adopts gray iron HT300 for mold blank casting, and then performs refined machining to achieve optimal control of mold tolerance, ensuring the fitting accuracy and operational stability of the mold.

High-quality silica sand is mixed with the phenolic resin binder using a sand mixer. this resin sand is poured into the mold and pressed firmly. With the skillful workers of Keboer, extremely precise sand molds are produced.

the sand mold solidifies at room temperature, forming a hard and durable mold. If necessary, a clay core for forming the internal cavity can be inserted, and then the upper and lower molds can be closed together.

Molten gray or ductile iron, precisely controlled for temperature and chemical composition, is poured into the mold cavity. The casting is allowed to cool and solidify for a period of 7 to 72 hours.

After the heat preservation process is completed, the casting is separated from the sand shell; the rough casting is then subjected to grinding, shot blasting treatment, and coated with anti-rust paint.

For custom casting parts that require more stringent tolerances, each finished product undergoes strict final inspection before shipment, including 3D scanning and ultrasonic testing, to ensure that it meets all the specifications required by the customers.