Casting brass alloy is a most popular in powder industry, accessories,furniture and many other application. Different supplier provide much different efficiency and quality, one fact is due to their different design experience and ability in gating system design,
The riser location is one of the problems we should considering well during designing for gating system. And there are some principles for the design of riser.
The riser should near to the position where the casting blank to be compensated
Risers should be installed at each hot joint, especially for the castings with uneven wall thickness.
To try to keep gate passing trough riser
The riser should not be placed where the castings bearing greater force.
We could arrange more several risers at the different height, meanwhile the risers should keep some away for each other.
We should try to avoid riser set in stress concentration area of casting.