how-to make a wax injector for jewelry casting patterns

You’ll you need is Rival crock pot that has a low heat setting and some sort of metal-syringe-like injection device (I use a small air cylinder) with enough mass and volume to keep the wax at flow temperature long enough to be able to pull your injector from the crock pot and make your pattern shot. The other requirement for the wax syringe is to size the injector opening to achieve flow at a low pressure (about 5 psi)…mine is about .062 diameter. ¬†You may need to set your crock pot on the high heat setting if your wax has a higher flow temp…the wax I use flows at 155 F.