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Pouring and Venting channels molded.
I used about 1/4 pound of the modeling clay to create the pouring and venting channels in the box.
Rather, the clay will form the impression of the channels into the molding rubber.
When this side of the mold cures, those channels will be filled up again with molding clay, and the other side will be poured.
The result will be hollow channels in the mold, ready for resin to flow.
The channels were rolled out of 1/4" molding clay snakes, pressed to the posterboard, and trimmed down with the shaping blade.
The venting channels up top were made thin and narrow on purpose, as air doesn't need a lot of room to escape, and narrow channels mean less resin to take up space.
The pouring channels on the bottom were made a little wider, because the resin is thicker than water, and needs a little space to flow.
I picked up a few cheap supplies from the local Dollar Store for mixing the molding rubber, basically consisting of a large plastic bowl, a scraper spatula, and a cheap tupperware-like container for mixing the resin.
The large plastic bowl will be for mixing the molding rubber, and the spatula is for mixing and scraping the sides to get all the rubber out. The silicone rubber when cured won't stick to the plastic bowl, so you can just peel off any leftovers.
The resin, however, will stick to the regular plastic bowl, so the tupperware-like container will be used for the resin.
The tupperware-like container I believe is made out of polyethelene, and the resin shouldn't stick to that.
Any leftover resin should pop out, but in case it doesn't, it's not a big loss.
The stuff cost me like $3, so it's cheap.
I'll be mixing and pouring the molding rubber tonight, so more pics will be posted later.
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