Tension cancellation device for internal structures in foundries is implanted within foundry mass such that centric spaces allowing air passage are formed

摘要

The device is implanted within a foundry mass and is comprised of POREXPAN(RTM: Not defined) type plastic material that prevents chemical damage by calcination during smelting through a mechanical process or a chemical process after calcination. Centric spaces are formed when obstacles are removed, allowing the passage of air of a suitable temperature and the correct drying process from within and outside of the foundry.