Nessalco Posted December 3, 2010 Posted December 3, 2010 I'm working on putting together a press for making gerbs. One basic bit of info I can't find - how much pressure is required to successfully press basic meal/ti gerbs? Is a couple hundred PSI adequate? A couple thousand? I haven't really seen it specified. Thanks! Kevin
FrankRizzo Posted December 3, 2010 Posted December 3, 2010 (edited) I'm working on putting together a press for making gerbs. One basic bit of info I can't find - how much pressure is required to successfully press basic meal/ti gerbs? Is a couple hundred PSI adequate? A couple thousand? I haven't really seen it specified. Thanks! Kevin Hi Kevin, I prefer to use ~9000 PSI on the comp (similar to making a BP-fuel motor), and increments of powder that are less than one full tube diameter once compressed (~1/2 tube diameter is perfect). You can use less compression when loading the gerb (~6500PSI), but the nozzle clay increment will need the full 9000PSI for proper forming and density. For simplicity, I use the full pressure all the way up the tube. You'll need some way of measuring the applied force on your tooling. You can take apart your hydraulic jack and do some simple machining to add a gauge, or you can make an external force gauge as detailed on the following site: Cheap Pressure to Force Gauge Edited December 3, 2010 by FrankRizzo
Nessalco Posted December 4, 2010 Author Posted December 4, 2010 Thank you, Frank. Just what I needed to know. The force-to-pressure sensor in the link is very neat! Kevin
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