Injected Ceramic Core are as follow:
1.Injecting the refractory mix bled into the core cavity after solidification the green core is removed from the cavity.
2.After inspecting the core it is packed in the ceramic flour and sintered in the furnace.
3.After sintering of the core it is used in the wax pattern production.
The main advantages of the injected ceramic cores:
*As the refractory mix is blended in the bulk qualities and then it is used for the injection of ceramic cores. The consistency of the ceramic cores is reliable whereas in case of gelling ceramic core,for production of individual ceramic core the refractory mix is measured and mixed with the binder. This could be affecting the variation, resulting in inconsistency.
*The surface finish and physical properties of the Injected Core quality is better than any other types of cores.
*While backing of the gelled ceramic cores due to the stress release, there are chances of bending, elongation and surface cracks. As the injected cores are packed in ceramic materials the chances of bending and cracking are eliminated.
*In case of gelling ceramic cores the gel time must be maintained very accurately. If the pouring takes more time then the gelling time, the gelling of the mix take place before pouring and this results in wasting the refractory and binder material. And if the pouring is done much earlier than the gelling time, the solid particles settle down in the cavity resulting in the uneven properties. While in case of injected ceramic cores rejected green cores risers and getting can be also reused. Injecting this material in the cavity is as easy as injecting a pattern wax.
*The shelf life of the refractory mix is as good as a Pattern Wax. Where as in case of gelling binder material have a very limited shelf life.