Suction vs Pressure 1

[GubrooEng]

High pressure die cast dies are usually cooled by water lines drilled inside the die. A leaking water line in the die can effect the quality of casting adversly. Specially when there is a crack in the die steel and water seeps into the cavity.

Generally water is pushed through the die to keep it cool. Can pulling the water, instead of pushing it will prevent a leak inside the die? Can anyone explain?

 

[insideman]

Your idea has been used in injection molding. Patented, I brlieve.

 

[ve7brz]

What you're looking at here is simply a matter of pressure differential. If you open the drain side of your water cooling channels to a pressure below atmosphere, any cracks will result in air entering the water stream rather than water entering the mould.