Method of firing ceramic core bodies

Abstract

Firing of ceramic cores () is important in order to achieve manufacturing processes. These ceramic cores () are generally formed in a 'green' state which has limited mechanical strength and may be distorted during the firing process by non-uniform thermal effects, etc. By providing a tube or containmentwhich is located on a saggar baseand surrounded by firing media, it is possible to achieve an initial pre-firing step whereby the 'green' state coreis located through a stemin an initial partial depthof firing mediain the tube or containmentuntil it achieves a sufficient mechanical strength to enable positional adjustment. Thus, the green core will be pre-fired in a kiln solely supported through the stemand then the core adjusted using a tool such as an engineering rule. There is a positional accuracy between the walls of the tube or containmentand the saggar basebetween all cores and then the tubesfilled and leveled with further firing mediafor the main firing of the corein use.