noob question: sprues and bubbles
Posted: Fri Oct 30, 2015 4:31 am
When making a mold, is there any basic theory I should know about choosing either (a) number of sprues, (b) location of sprues, or (c) thickness/shape of sprues?
Does increasing the number or thickness of sprues necessarily mean less bubbles in the finished cast? Should all of my sprues be the same thickness?
Background: I gravity cast with a two-part RTV silicone mold. I use SC 321 mostly. Sometimes SC 327.
Does increasing the number or thickness of sprues necessarily mean less bubbles in the finished cast? Should all of my sprues be the same thickness?
Background: I gravity cast with a two-part RTV silicone mold. I use SC 321 mostly. Sometimes SC 327.