CORE FOR MAKING HOLLOW CASTINGS Russian patent published in 2004 - IPC

FIELD: manufacture of hollow castings in chilled molds.

SUBSTANCE: core includes sections mutually spaced by gaps and mutually joined along their lateral surfaces through dents and grooves having trapezoidal cross section. Said dents and grooves are arranged along lengthwise axes of lateral surfaces of sections. Total gap value between core sections exceeds value of linear shrinkage of casting material. Gaps are filled with pliable material for fixing initial position of sections. Core is provided with coating for preventing pickup.

EFFECT: enhanced operational reliability of rod, possibility for making high-quality castings of any alloys without shrinkage cracking.

2 dwg