When making gating system for a die casting mold, it is better to list all the possible solutions and then compare with each other first.

After that, you will find a best gating system for the tooling. Here are several examples of die casting toolings.

Solution 1

Solution 2

Solution 3

Solution 4

It will create air entrapment in the location of top step with both solution 1 and solution 2.

Air entrapment can only be avoid with solution 3 and solution 4.

However, comparing with solution 4, the solution 3 are with longer flow path and with more corners relatively.

So the solution 4 should be best one among all these 4 solutions.