Post by Brian on Mar 31, 2019 15:19:49 GMT -5
The pour gates and vents are often over looked as a probable cause of a bad resin pour....improperly located or too small/too large will more than likely lead to issues and frustration. Every mold is different , so I wont go into detail on locations or sizes as there are as many different locations and sizes as there could be molds.
I've done something very similar to this in the past... alumilite.freeforums.net/thread/475/25-scale-dry-sump-mold The two support pillars where more than enough to support the master to be cast, but ended up causing an excessive, extra amount of resin to be removed from the cast.
I was never quite satisfied with the first version of this mold...a front frame section for a stock car....lack of proper resin flow to the front cross member (Blue) and the engine cross member (Red) plus I had the pour gates and vents in the wrong locations.
I Used modeling clay to make the new pour gates and vents. I simply rolled the clay to the diameter I needed, positioned the rolled clay piece where I need the pour gates with the vents directly opposite of the pour gates. Clean up should be fairly simple and in areas of the cast that are not critical on appearance.