Plastic_Passion Posted August 26, 2020 Share Posted August 26, 2020 Flex bar reprorubber..... I work in a machine shop and we use this stuff. Anyone heard of it? I want to cast some resin parts and would love to use this as my masters. No release agent needed when making molds but I'm not sure how itd work pouring something into it. FWIW I've never cast but want to. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 26, 2020 Share Posted August 26, 2020 Never heard of the stuff, but who knows, maybe it will work. If you are starting out, I'd begin with known good materials, get the hang of it, then experiment with other materials or methods. Quote Link to comment Share on other sites More sharing options...
peteski Posted August 26, 2020 Share Posted August 26, 2020 My first question would be: What is it used for in the machine shop? I also say that if you want to resin-cast some stuff, it would make sense to use the materials specifically designed for casting. Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 26, 2020 Author Share Posted August 26, 2020 Thank you guys for the suggestions. You're right in the get the hang of it before the experimentation. It's used in the shop I work at to get measurements of parts that you otherwise wouldn't be able to get without molding it. Such as dimensions like a countersink. You may need to know the angle of the countersink to mate up with the screw you plan on using. In this instance you would mold the countersink then cut the mold and use edge finding techniques to find the dimensions. Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 26, 2020 Author Share Posted August 26, 2020 Quote Link to comment Share on other sites More sharing options...
Deuces ll Posted August 26, 2020 Share Posted August 26, 2020 We use some similar stuff in our inspection room but it's blue.... Don't know the name of the stuff, sorry.... Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 26, 2020 Author Share Posted August 26, 2020 Ours is blue as well Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 26, 2020 Author Share Posted August 26, 2020 Quote Link to comment Share on other sites More sharing options...
Deuces ll Posted August 26, 2020 Share Posted August 26, 2020 We use a 2-part epoxy mix..... And it stinks!!!!!.... ?? Quote Link to comment Share on other sites More sharing options...
peteski Posted August 26, 2020 Share Posted August 26, 2020 It might work for simple molds. Heck, some people use PlayDoh for molds. But going by its original use, that rubber is not very stretchy. If you want to mold more complex shapes the mold material needs to be quite stretchy so the hardened parts can be removed. Quote Link to comment Share on other sites More sharing options...
CabDriver Posted August 26, 2020 Share Posted August 26, 2020 3 hours ago, peteski said: Heck, some people use PlayDoh for molds For something simple that you’re trying to cast one of, that’s actually a REALLY good idea (if it works). Better go get me some PlayDoh and experiment ? Quote Link to comment Share on other sites More sharing options...
davysmodels Posted August 28, 2020 Share Posted August 28, 2020 Looks like a great product, but it is $$$$$$$$$$$$$$$$$$$$$$$$$$$$ The sample kit is 80. from the mfg web site. If you want to start resin casting, visit www.smooth-on.com They have many online videos for learning casting and making molds. Link to starter kit. https://www.smooth-on.com/products/pourable-silicone-starter-kit/ I purchased the starter kit several years ago. Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 29, 2020 Author Share Posted August 29, 2020 7 hours ago, davysmodels said: Looks like a great product, but it is $$$$$$$$$$$$$$$$$$$$$$$$$$$$ The sample kit is 80. from the mfg web site. If you want to start resin casting, visit www.smooth-on.com They have many online videos for learning casting and making molds. Link to starter kit. https://www.smooth-on.com/products/pourable-silicone-starter-kit/ I purchased the starter kit several years ago. It is great for sure. But I only know it in the context of machining. And you're not kidding about the arm and leg and 18 teeth price wise. ? I'll check out the link for sure! Thank you for the recommendation. Quote Link to comment Share on other sites More sharing options...
Ace-Garageguy Posted August 29, 2020 Share Posted August 29, 2020 19 minutes ago, Plastic_Passion said: ...I'll check out the link for sure! Freeman Manufacturing has a series of instructional videos to support their range of tooling, mold-making, and casting products too. https://www.freemansupply.com/video.htm So does Polytek. https://www.polytek.com/how-to/tutorials-videos I've used many of the materials both companies offer, and they're all first rate. Knowledge is power. Quote Link to comment Share on other sites More sharing options...
Chariots of Fire Posted August 29, 2020 Share Posted August 29, 2020 I use mold making rubber RTV from Micro-Mark all the time. I use it for simple molds as well as more complex two piece molds. It is re-usable and is flexible with excellent reproduction of minute details. It's mixed 50/50 and has a set-up time of about 4 hours. Two part molds need mold release between them in order to get them apart for casting purposes. Quote Link to comment Share on other sites More sharing options...
Plastic_Passion Posted August 31, 2020 Author Share Posted August 31, 2020 Thank you to all who have contributed to this thread! Quote Link to comment Share on other sites More sharing options...
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