Piscivorous Pike Posted July 6, 2010 Report Share Posted July 6, 2010 I am re-making my favorite designs and having used How To Make Hook Slot Inserts In Your Mold . I used both pyramid style and Martha Stewart candle making pvc pipe round enclosed molds. But that has lead up to a new question and I need advice. The next series of mold will be a brick, not pyramid and I will cut the lure out of a slot and enlarge the slot into a pouring channel, bigger than a sprue but not as wide as the back of the fluke. I will use Smooth On Mold Max, a translucent so I can see where to cut. I used Shore 27 before but found it stiff enough to wrestle with when using the full round version clam shell molds. I think I should use a Shore 15. It comes in 10, 15 and 20. How soft in Shore hardness can you make an open one piece mold? If I made it totally open like most one piece molds are made I could go as hard as they make the RTV. But to remove the lure I will need to flex the mold. Your suggetions please. P.Pike Quote Link to comment Share on other sites More sharing options...
anselmo Posted July 9, 2010 Report Share Posted July 9, 2010 I am re-making my favorite designs and having used How To Make Hook Slot Inserts In Your Mold . I used both pyramid style and Martha Stewart candle making pvc pipe round enclosed molds. But that has lead up to a new question and I need advice. The next series of mold will be a brick, not pyramid and I will cut the lure out of a slot and enlarge the slot into a pouring channel, bigger than a sprue but not as wide as the back of the fluke. I will use Smooth On Mold Max, a translucent so I can see where to cut. I used Shore 27 before but found it stiff enough to wrestle with when using the full round version clam shell molds. I think I should use a Shore 15. It comes in 10, 15 and 20. How soft in Shore hardness can you make an open one piece mold? If I made it totally open like most one piece molds are made I could go as hard as they make the RTV. But to remove the lure I will need to flex the mold. Your suggetions please. P.Pike What are the heat ratings for the RTV you want to use? This is as important as the Shore rating Nick Quote Link to comment Share on other sites More sharing options...
Piscivorous Pike Posted July 9, 2010 Author Report Share Posted July 9, 2010 What are the heat ratings for the RTV you want to use? This is as important as the Shore rating Nick I have used 27T, just a bit too stiff for very complicated patterns, but did ok in clam shell style molds as posted in #1. I found some information in bloodydecks (dot)com. A fellow uses Shore 40 for open molds and softer than 25 for one that he has to bend to get the lure out of. He uses Asahi Glass company RTV, a Japanese company I cannot find the RTV listed but his pictures suggested he knew what he was doing. I would like to find some of it. I am using Smooth-on http://www.smooth-on.com/tb/files/MOLD_MAX_10T_15T_27T_TB.pdf Mold Max® 10T, 15T & 27T Useful Temperature Range: -65°F to 400°F (-19°C to 205°C) Quote Link to comment Share on other sites More sharing options...
Troul Hawk Posted July 9, 2010 Report Share Posted July 9, 2010 (edited) I have found that this RTV is flexible, tear resistant, picks up extremely small detail and is very long lasting. http://www.micromark.com/TEN-TO-ONE-and-HIGH-TEAR-STRENGTH-MOLD-RUBBER-28-FL-OZ,8155.html If you poured half the mold and let the RTV cure, then painted on mold release on all the sides but the base and then poured the second half it would create a clamshell effect. Was this what you were looking for? Edited July 9, 2010 by Troul Hawk Quote Link to comment Share on other sites More sharing options...
