Zglossip Posted January 18, 2015 Report Share Posted January 18, 2015 Hey there quick quistion I would apreciat a speedy response . I have received a resin casting kit from a family member for Christmas and I am having a very hard time trying to figure out how to cast a 3d tank wheel the I have been making pour on molds and I can't get the resin to come out of the mold without breaking it is really frustrating me i need help I know some of you use resin casting a lot so I thought I would ask here seeming I can't find anything on the internet to help me . Link to comment Share on other sites More sharing options...
Schmitz Posted January 18, 2015 Report Share Posted January 18, 2015 Hey there quick quistion I would apreciat a speedy response . I have received a resin casting kit from a family member for Christmas and I am having a very hard time trying to figure out how to cast a 3d tank wheel the I have been making pour on molds and I can't get the resin to come out of the mold without breaking it is really frustrating me i need help I know some of you use resin casting a lot so I thought I would ask here seeming I can't find anything on the internet to help me . Not sure what you mean by a pour on mold. The technique I've seen for small parts is to attach a styrene rod to the part, apply some mold release to the part, then use the rod to suspend the part in a small box and fill it up with RTV. Once the RTV cures, take a sharp knife and split one end of the rubber down the middle to the part; you should be able to open the mold up and pull the part out without tearing the rubber. Now you've got a single piece RTV mold with a pour hole (where the rod was sticking out of the part). Rubber band the split end shut and pour in the resin; once it cures it should come out as easily as the original. Not sure how well that's going to work for a road wheel, but worth a try. Link to comment Share on other sites More sharing options...
skiffy58 Posted January 19, 2015 Report Share Posted January 19, 2015 Without knowing what brand you are using, I've used Smooth-On and Alumilite and you also do not say what broke, the resin copy or the mold. Without that knowledge the best I can suggest is you are not using any mold release. Each casting company makes a mold release that you coat the master with and then the mold when casting. I just use Vaseline - a very thin coat. Also, as Schmitz suggested, cutting the mold slightly to help get the part out is recommended as well. It won't mess up the mold for re-use, save possible a seam on the copy that is easily sanded or adzed away. HTH - Larry Link to comment Share on other sites More sharing options...
Zglossip Posted January 19, 2015 Author Report Share Posted January 19, 2015 The resin broke and what I mean by pour on I place it in a cup an pour the the rubber over it per instructions the the kit I have is smooth-on Link to comment Share on other sites More sharing options...
ghodges Posted January 19, 2015 Report Share Posted January 19, 2015 (edited) Here's a link to the Smooth-On web page. They have videos and step-by-step pics that may help you see what you need to do to help remedy your problems: http://www.smooth-on.com/Model-Making/c1290/index.html Here's a good tutorial on casting a part with a 2-part mold: https://www.youtube.com/watch?v=joexdltgj-k GIL Edited January 19, 2015 by ghodges Link to comment Share on other sites More sharing options...
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