Chih Chuen used refined foundry sand as a base sand and coated the resin with hot mulling process, which advantages are as follows:
1. Long storage life,not absorbs moisture,and not makes a lump.
2. Even mixing,so the strength of outside mold or core is very high.
3. Minimum gas liberated, so can obtain a good working environment.
4. Due to high permeability, so the quality of mold is excellent.
5. Fine grain to ensure smoothness.
6. It is easy to make mold because of good flowability.
7. High percentage of SiO2, very low clay contain and no pan existing to ensure good refractor.
In addition to the above mentioned specifications, Chih Chuen still continued to research and develop the
Special products as follows:
N Series: It is suitable for aluminum alloy due to high strength and good knock-out.
H Series: The resin coated sand cure quickly and can improve the molding efficiency and reduce cost.