Post by cablebutcher on Jul 27, 2018 14:58:55 GMT -5
I am trying to address the issue of relieving the air trapped in a mold while pouring. I am making cannon barrels for a ship model. I used your "starter kit" from Hobby Lobby as I am new to this. I created three one piece molds (I have attached a photo to show the scale I am working with)(I cut one of the one piece molds in half to see how the mold of the master went -perfectly). I did "dust" the molds with talc, heated the molds before the pour,and I attempted to agitate the pour with a wire to release any trapped air. I am pretty sure the short open time of the RC-3 resin kept the agitation from being too effective. I am looking for suggestions for a product with a greater open time and, if possible, thinner consistency to allow the use of a small diameter tube to "flow" the resin into the mold from the bottom up, allowing the air to escape as I back the tube out as the cavity fills. Knowing any filling device would probably be a one use only item, I would prefer not to resort to disposable syringes due to cost. As the photo shows, the silicone mold was excellent, and the one, almost complete, reproduction tube is also excellent, so I know the issue is my not getting the air out, not any product issues. When I begin to produce the barrels (18 in total) I will introduce a black dye to the resin for the pours. The molds seems to have held up well to theextraction of the tube through the pour opening, and I'm hopeful it will last through 6 pours. Any suggestions you may have would be appreciated.