Gilmour Posted September 19, 2012 Posted September 19, 2012 (edited) File Name: Pneumatic Rocket Press File Submitter: Gilmour File Submitted: 19 Sep 2012 File Category: Rocketry Construction details for a small pneumatic press that i put together to speed the production of rockets and other small pyrotechnic devices that need pressing. Click here to download this file Edited September 25, 2012 by Gilmour 1
graumann Posted September 19, 2012 Posted September 19, 2012 This should be used as an example to anyone who makes a youtube instructional, clean orderly work area, everything nicely laid out and a presenter who has clearly done this once or twice before filming. Well done, a superlative video and very neat work. A couple of questions on the ram, is that fed from an idle compressor? and what sort of pressure are you getting on the composition?
Col Posted September 20, 2012 Posted September 20, 2012 Nice vid,I would`ve put the lid back on the flash when i was done with it so as not to tempt fate According to the math, 80psi on the 4" ram works out to about 2263 psi on a 3/4" or 5093 psi on a 1/2"
dave321 Posted September 20, 2012 Posted September 20, 2012 nice job ! how do controll it to achieve the pressure ...stop....and then raise it again ? i dont know much about pneumatics, isit easy to do ? air line or electric compressor used ? dave
Maart Posted September 20, 2012 Posted September 20, 2012 Indeed a very nice video! Using a pneumatic ram for sure speeds up the process compared to using a hand operated hydraulic press. If you want to share your design details, I would be interested!
taiwanluthiers Posted September 20, 2012 Posted September 20, 2012 The pressure has got to be not that much... normally you have a support sleeve around the tube to prevent it from failing from the pressure. I didn't think air would provide enough pressure to press a rocket because you guys are talking about using a 12 ton press or at the very least, a 3 ton press and it just doesn't seem like air would provide the pressure unless it had a very large cylinder.
Swede Posted October 16, 2012 Posted October 16, 2012 I'm a huge fan of such finely made pyrotechnic tools. Really nice system. The cool thing about penumatics vs hydraulics (there are two, actually), the speed of the system, and the ease with which one can determine the pressure on the fuel. If you set your regulator for 80 PSI, then you are getting 80 PSI on the end of the rammer, assuming the cylinder in the air actuator has the same diameter as the rammer for the motor. If your air actuator diameter is one inch, then a little bit of math will help determine the pressure on the end of a 1/2" spindle. It's always a bit of a hassle to add a pressure gauge to a hydraulic system unless it comes that way from the factory..
dan999ification Posted October 16, 2012 Posted October 16, 2012 that baffled me about the pressure to force conversions, i have backround using air pressure in various interesting ways, it is much simpler to me, if i was to build a press it would have to be pneumatic. Nice work it has inspired me. Dan.
Col Posted October 16, 2012 Posted October 16, 2012 (edited) Hydraulic is cheaper and more powerful. You`d need an 8" diameter ram (80psi) to put 8860 psi on a 3/4" Edited October 16, 2012 by Col
dagabu Posted October 16, 2012 Posted October 16, 2012 And only 500LPI on hydraulic with a 3" ram... -dag
zvrh Posted October 24, 2012 Posted October 24, 2012 So do you guys think that this press/system is sufficient enough to press a 20mm ID BP coreburner ?
Col Posted October 24, 2012 Posted October 24, 2012 Not really, even with 175psi air pressure you`d only have 4500psi on the comp.
zvrh Posted October 25, 2012 Posted October 25, 2012 Oh ok, I see. So like you mentioned before the best cheapest thing really, would be to buy a 10 ton shop press..
Col Posted October 25, 2012 Posted October 25, 2012 Aye, just add a blast shield and you`re off to the races.
FrankRizzo Posted October 26, 2012 Posted October 26, 2012 So do you guys think that this press/system is sufficient enough to press a 20mm ID BP coreburner ? if you make your increments small enough, and dwell at the highest pressure you can achieve with your air input, it may work. A bit of moisture in the fuel,and subsequent drying time after the motor is pressed may also allow you to use lower loading pressure. The clay nozzle would be my concern; it's tough to consolidate the clay effectively at low pressure.
zvrh Posted October 27, 2012 Posted October 27, 2012 if you make your increments small enough, and dwell at the highest pressure you can achieve with your air input, it may work. A bit of moisture in the fuel,and subsequent drying time after the motor is pressed may also allow you to use lower loading pressure. The clay nozzle would be my concern; it's tough to consolidate the clay effectively at low pressure.Yeah.. Nozzle probably woulden't withstand the pressure.Interesting... But is it all worth it? Isn't it cheaper and more effective if I just buy a 10t press?It looks very cool with this pneumatic system and all but, I think it is not as effective as a shop press if want to keep the prcie at around 200€. Unless you are willing to spend some more money on it. What do you think?
Col Posted October 27, 2012 Posted October 27, 2012 A 10T press with 6500psi on a 20mm clay nozzle would be running at 10% of its overall capacity.
stix Posted February 2, 2016 Posted February 2, 2016 (edited) I can't see a video in the link, just an image. Is there something I've missed? Edited February 2, 2016 by stix
RipRap Posted November 1, 2017 Posted November 1, 2017 The link appears to be broken. Does anyone have a copy of the plans that they can share?
Mumbles Posted November 1, 2017 Posted November 1, 2017 It's not. It's a thing that happens to people with 0 posts.
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