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less expensive molds
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here are a few pics of how i do things...if i am not allowed to put pics here, someone..please tell me..
thanks
http://i70.photobucket.com/albums/i1...e/P3193578.jpg
Yeah that "floating method" will get you pretty good results. But that is also where you are using alot of excess rubber. If you doing a mego or mego size head, you need to switch to the 3oz. size dixie cups. Also flip the head til it sits in the bottom of the cup. Use alittle double stick tape to make it stick to the center of the bottom of the cup. If the neck plug is too short, glue a spacer to it. You should get better castings (following my above tips) and use about half the rubber.
BobComment
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ive tried that before...not with very good results..but i figure that i have gotten somewhat better at it, so i might give it a try again, this time around...im waiting on a few heads from someone...and as soon as they get here, im going to make some molds...
thanks for the info..appreciate it alot...Comment
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some heads that i have done....have learned and gotten rid of most of the air pockets since then..just a matter of pouring slower and moving the mold as i pour...but.....anywho...
Comment
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Hmmmm....
You guys do things WAY different from how I do it:
These have just been started.
I usually have ten or so on the go at any one time. I sink the original in plasticiene (NOT Play-Dough; you need something that won't dry out.) and build a lego box that fits the part. I cut the plasticiene and add air canals and guide pin holes. I then glue the lego box in place with white glue, to prevent leaks. (You'll note the molds are mounted on cardboard.) Then I pour the silicone. I pour thin coats over all the molds going: this lets air escape from the surface. Once the original is covered I usually let the silicone set, and then fill the rest of the mold. If I'm making a mold of something I only need a few of, I'll cover the original with silicone and once that's cured fill the rest with plaster of paris. (It's a LOT cheaper.) Once everything sets I flip it over, remove the plasticiene, trim the flash, coat it all with Vaseline, and pour the silicone for the second half.
Don C.Last edited by ctc; Feb 6, '08, 7:12 PM.Comment
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Don I've built many box molds. I use foam board to build mine. I only do that with larger sculpts like some of the garage kits I produce. I wouldn't use Vaseline as a mold release tho. It will eat silicone and other casting rubbers. Go old talc powder works just fine and it's cheap.
BobComment
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Here's quick link on mold building:
The Blog Of The Mad Robot
Tommy produces some topnotch stuff.
BobComment
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>I wouldn't use Vaseline as a mold release tho.
I use it to keep the two halves from sticking. Once the molds are done I don't use any releaser on them.
>Go old talc powder works just fine and it's cheap.
Although I DO use some talcum powder to prevent air bubbles! Works really well!
Don C.Comment
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