J lure Posted May 14, 2012 Report Share Posted May 14, 2012 I hate making mold boxes to pour my rtv silicone. What type of material is everyone using, I've tried plastic containers, cardboard, wood, and foam board. I find making these boxes seems to be very time consuming.... Anyone have a easy way? Quote Link to comment Share on other sites More sharing options...
wchilton Posted May 14, 2012 Report Share Posted May 14, 2012 Do a google search for "cottle boards". This is about the neatest method I've seen for making rectangular mold forms. Easy, re-useable, and adjusts for any size mold form. I haven't tried it yet myself but I'm sure it will work fine for RTV as long as the edges are sealed well. To seal edges, get yourself some modeling clay. I've actually used modeling clay alone to make a quick/dirty silicone mold box. Wherever RTV contacts the modeling clay results in a soft matte finish on the rtv when it's set. Quote Link to comment Share on other sites More sharing options...
dlaery Posted May 14, 2012 Report Share Posted May 14, 2012 This is 1-3/4" x 1/4" (aka Lattice) PVC purchased from a Lowes Home Improvement (same as Home Depot, Menards etc...) The short piece is Glued with PVC glue to make a "L" shape piece to be used with the clamps to make any size of box you want. This sets on a board with wax paper. 1 Quote Link to comment Share on other sites More sharing options...
J lure Posted May 14, 2012 Author Report Share Posted May 14, 2012 Awsome... Looks like a great time saver! Quote Link to comment Share on other sites More sharing options...
Cami Posted May 15, 2012 Report Share Posted May 15, 2012 Plasticine: quick, reusable, you can obtain any kind of perimetric shape (to save RTV), you don't need any kind of sealant. Bye Cami Quote Link to comment Share on other sites More sharing options...
mark poulson Posted May 15, 2012 Report Share Posted May 15, 2012 I've heard of people using Legos and hot glue, but I haven't tried it. Quote Link to comment Share on other sites More sharing options...
rixon529 Posted May 15, 2012 Report Share Posted May 15, 2012 (edited) Do a google search for "cottle boards". This is about the neatest method I've seen for making rectangular mold forms. Easy, re-useable, and adjusts for any size mold form. How to make your own: Text / graphics: http://www.smooth-on...p?pID=53&cID=11 Video: This is the only one I've seen available for retail that's pre-made: http://www.makeyouro...just-a-mold-box Rick Edited May 15, 2012 by rixon529 Quote Link to comment Share on other sites More sharing options...
mark poulson Posted May 16, 2012 Report Share Posted May 16, 2012 That's a neat idea. I'll have to try that. Quote Link to comment Share on other sites More sharing options...
Tree_Fish Posted May 16, 2012 Report Share Posted May 16, 2012 Thanks for that vid Rixon, I know how I'll be doing mold boxes from now on! Quote Link to comment Share on other sites More sharing options...
J lure Posted May 16, 2012 Author Report Share Posted May 16, 2012 Yes this method (new to me) will save alot of time. Quote Link to comment Share on other sites More sharing options...
Basscandy92040 Posted May 16, 2012 Report Share Posted May 16, 2012 This is 1-3/4" x 1/4" (aka Lattice) PVC purchased from a Lowes Home Improvement (same as Home Depot, Menards etc...) The short piece is Glued with PVC glue to make a "L" shape piece to be used with the clamps to make any size of box you want. This sets on a board with wax paper. I like it. I am sure it is cheaper than $39.00 as shown on a later post. What do you use to seal the bottom edge between the boards and wax paper? Thanks Quote Link to comment Share on other sites More sharing options...
dlaery Posted May 16, 2012 Report Share Posted May 16, 2012 I like it. I am sure it is cheaper than $39.00 as shown on a later post. What do you use to seal the bottom edge between the boards and wax paper? Thanks Nothing, gravity. Quote Link to comment Share on other sites More sharing options...
mark poulson Posted May 17, 2012 Report Share Posted May 17, 2012 Nothing, gravity. My experience with the good silicone mold making stuff (one time because I'm cheap) is that it is really runny. That helps it to get into all the nooks and crannies of the master. Are you saying the weight of the box forms and clamps is enough to get a good seal at the bottom, so the silicone doesn't run out? Quote Link to comment Share on other sites More sharing options...
dlaery Posted May 17, 2012 Report Share Posted May 17, 2012 Well, I've never thought about sealing he bottom because the 1st pour has modeling clay in the bottom. I have never poured the silicone in the frame first. I don't think it would run out from under the frame, but I have been wrong, what a shocker Quote Link to comment Share on other sites More sharing options...
mark poulson Posted May 20, 2012 Report Share Posted May 20, 2012 Sounds like the modeling clay seals it just fine. Good going! Quote Link to comment Share on other sites More sharing options...
longhorn Posted May 22, 2012 Report Share Posted May 22, 2012 In the member submitted tutorials on page 2 there is one titled "Quick and easy mold boxes". I use this method for RTV. Quote Link to comment Share on other sites More sharing options...
bodfish Posted May 23, 2012 Report Share Posted May 23, 2012 Hey guys, Back when i was hell bent few leather to pour I had a set of aluminum boxes machined so I could make sure all the molds (high temp RTV and flexible resins) were square and could be trained together. They work well but were a bit expensive. bodfish Quote Link to comment Share on other sites More sharing options...
Smallie Posted May 25, 2012 Report Share Posted May 25, 2012 This is 1-3/4" x 1/4" (aka Lattice) PVC purchased from a Lowes Home Improvement (same as Home Depot, Menards etc...) The short piece is Glued with PVC glue to make a "L" shape piece to be used with the clamps to make any size of box you want. This sets on a board with wax paper. What type of RTV was used to pour the lead head jig? Quote Link to comment Share on other sites More sharing options...
dlaery Posted May 25, 2012 Report Share Posted May 25, 2012 I tried to do a search on here to find a post about the RTV I use but I can't get any results with the search. I think It is called Rhodisil . There was some others in tha post that may have found a place to get it and may have tried it. I only used it because my customer furnished the RTV. It seems to be good stuff, it is platinum cure, I think that means it better? It seems pretty soft when cured, I am guessing it is a 30 durometer. Quote Link to comment Share on other sites More sharing options...
Smallie Posted May 26, 2012 Report Share Posted May 26, 2012 Thank you David - using Google, I was able to find this thread and it gave me the info I needed. I didn't know there was a RTV that would take the heat. Your picture after the pour really caught my eye because the RTV was not burnt. http://www.tackleunderground.com/community/topic/23425-mold-material/page__p__175633__hl__rhodia#entry175633 This thread is in the wire bait forum and is very informative. Thanks again. Quote Link to comment Share on other sites More sharing options...
wnybassman Posted June 5, 2012 Report Share Posted June 5, 2012 On my aluminum trim break I bent long strips of aluminum into an L channel. Then just nip one side of the L and bend it around. Duct tape it down. Done. Quote Link to comment Share on other sites More sharing options...
mark poulson Posted June 5, 2012 Report Share Posted June 5, 2012 Sweet! Quote Link to comment Share on other sites More sharing options...
XFactorTackle Posted June 6, 2012 Report Share Posted June 6, 2012 I use Lexan and a hot glue gun. Make sure it's lexan, NOT plexiglass because the plexiglass will break when you go to take your walls down. For the base, I also use Lexan. It works really good for me, cheap and really simple. Quote Link to comment Share on other sites More sharing options...
Paxamus Posted June 6, 2012 Report Share Posted June 6, 2012 I use Rhodorosil v340 to make lead jig molds, works great and I make my mold boxes out of legos. The legos work great, only a tiny bit of silicone sneaks in between the legos Quote Link to comment Share on other sites More sharing options...
