Patents and applications on blade casting. A patent is a claimed approach, not a confirmed result.
DefectsPatent
A patent application: where freckles show up on a trial casting, thin wax rods are attached to the pattern across or along the convection flow. The segregation channels move into these ribs, which are ground off afterwards.
SolidificationPatent
An SJTU application: ceramic-fibre plates at critical levels of the mould block vertical radiation and reduce front tilt. Lower freckle and stray-grain tendency is claimed.
CoresPatent
A Jiangsu University patent: fused alumina with quartz and MgO on a sodium phosphate and sodium aluminate binder, claimed to dissolve in caustic or hot water in 2–4 hours.
