Zmuro Posted November 28, 2011 Share Posted November 28, 2011 This is my latest tool in my workshop. The star hight can be adjusted from 16 to 24mm, with a simple turn.I pumped 3kg of 18mm stars in 45min. http://www.pyrobin.com/files/pumping%20station%203.jpg http://www.pyrobin.com/files/pumping%20station%202.jpg Video of tooling in action: http://www.pyrobin.com/files/pumping%20station%204.3gp Link to comment Share on other sites More sharing options...
Mumbles Posted November 28, 2011 Share Posted November 28, 2011 Very cool looking. How is the consistency between composition density and weight between each comet? It seems like it'd be a little hard to control exactly how much composition gets into the tooling each time. Link to comment Share on other sites More sharing options...
allrocketspsl Posted November 28, 2011 Share Posted November 28, 2011 This is my latest tool in my workshop. The star hight can be adjusted from 16 to 24mm, with a simple turn.I pumped 3kg of 18mm stars in 45min. http://www.pyrobin.com/files/pumping%20station%203.jpg http://www.pyrobin.com/files/pumping%20station%202.jpg Video of tooling in action: http://www.pyrobin.c...station%204.3gp i wish i knew how to make things like this been thinking of getting a metal lathe great job on this mate add a couple more tubes your in production Link to comment Share on other sites More sharing options...
Zmuro Posted November 28, 2011 Author Share Posted November 28, 2011 Very cool looking. How is the consistency between composition density and weight between each comet? It seems like it'd be a little hard to control exactly how much composition gets into the tooling each time.I took 10 stars and weigh them, the weight of single star was between 6,1 and 6,3g so I think that's good enough. I constantly add composition in to the box and compress it a little, so that the pump gets almost the same amount of star composition every time. Link to comment Share on other sites More sharing options...
FREAKYDUTCHMEN Posted November 28, 2011 Share Posted November 28, 2011 Great machine Zmuro. How much pressure is there involved, and what about the percentage moisture in the composition? Link to comment Share on other sites More sharing options...
Arthur Posted November 29, 2011 Share Posted November 29, 2011 I like the idea! Have a look at a "Tablet Press" on ebay, the single punch machines can easily press out a tablet (star!) per second at low moisture content. Now if your machining skills are up to grade the you should be able to make one for a useful range of star sizes. BIG CAVEAT these things are often "cash on collection" with "smiley face dies" for the illegal drug trade, so deals may come with dog and dog handler attached. Link to comment Share on other sites More sharing options...
Col Posted November 29, 2011 Share Posted November 29, 2011 Nice tool, I have a 100mm bore cylinder destined for a similar purpose when i get round to it.I like your automatic star ejection feature, i`d be tempted to use a sloping ramp (operated by the piston motion) to direct the star into a tub Link to comment Share on other sites More sharing options...
Zmuro Posted November 29, 2011 Author Share Posted November 29, 2011 Great machine Zmuro. How much pressure is there involved, and what about the percentage moisture in the composition?I'm using 50mm ID cylinder and 7 to 8 bar of pressure so that gives you 137-157 kg of force on a single star. I also have 80mm ID cylinder which will give 400 kg of force at 8 bar. In the future I will make multi star pump which will pump 8 or more stars (depending on star size) at once. Link to comment Share on other sites More sharing options...
Arthur Posted November 29, 2011 Share Posted November 29, 2011 (edited) Nice start to a useful machine. Please look at the method of extracting the stars, anything is better than putting your hand under a press tool. How about a timed air jet to blow the star onto a chute. Edited November 29, 2011 by Arthur Link to comment Share on other sites More sharing options...
stckmndn Posted November 29, 2011 Share Posted November 29, 2011 I like the idea! Have a look at a "Tablet Press" on ebay, the single punch machines can easily press out a tablet (star!) per second at low moisture content. Now if your machining skills are up to grade the you should be able to make one for a useful range of star sizes. BIG CAVEAT these things are often "cash on collection" with "smiley face dies" for the illegal drug trade, so deals may come with dog and dog handler attached. Dammit. You had me searching the web for an hour. I would kill to have one of those hand cranked presses for making 1/4" stars. But they are very expensive and seemingly hard to find. Link to comment Share on other sites More sharing options...
Col Posted November 30, 2011 Share Posted November 30, 2011 I'm using 50mm ID cylinder and 7 to 8 bar of pressure so that gives you 137-157 kg of force on a single star. I also have 80mm ID cylinder which will give 400 kg of force at 8 bar. In the future I will make multi star pump which will pump 8 or more stars (depending on star size) at once. A multi star pump will make it a lot cheaper to run. According to the cylinder specsheet, i`d need about 2000L (70 cubic feet) of air (40mm travel) to press 3kg of comp one star at a time. Link to comment Share on other sites More sharing options...
Zmuro Posted August 7, 2012 Author Share Posted August 7, 2012 (edited) My new 30 mm crossette tool and multiple star pumps (8, 11, 14, 16 mm) made from stainless steel. The cross for crossette was drawn in Solidworks and then made on 5-axis cnc router. Edited August 7, 2012 by Zmuro 1 Link to comment Share on other sites More sharing options...
pyrogeorge Posted August 7, 2012 Share Posted August 7, 2012 Good job Zmuro!How can you remove the stars with this tools? Link to comment Share on other sites More sharing options...
dagabu Posted August 7, 2012 Share Posted August 7, 2012 Good job Zmuro!How can you remove the stars with this tools? They auto eject, look for the spring in the middle. Nice tooling! -dag Link to comment Share on other sites More sharing options...
deadman Posted August 7, 2012 Share Posted August 7, 2012 Yeah his original video shows how easy his autoeject works. They just come out in his hand. This is awesome. Link to comment Share on other sites More sharing options...
dave321 Posted December 18, 2017 Share Posted December 18, 2017 Nice tool, I have a 100mm bore cylinder destined for a similar purpose when i get round to it.I like your automatic star ejection feature, i`d be tempted to use a sloping ramp (operated by the piston motion) to direct the star into a tub how is the ejection of the star controlled ?are there 2 tubes one to fill/compress the powder and an inner one to eject it ? Link to comment Share on other sites More sharing options...
NeighborJ Posted December 19, 2017 Share Posted December 19, 2017 Dave, if you look at the picture you will see an aluminum bracket clamped to the press support. It is a catch for a bolt inside the pump. When the pump retracts the bolt makes contact with the brace and slides in a slot to eject the comet. 1 Link to comment Share on other sites More sharing options...
Col Posted December 19, 2017 Share Posted December 19, 2017 Here`s the arrangement i used to mod a 1T arbour press ram. Link to comment Share on other sites More sharing options...
Grumpy Posted August 12, 2018 Share Posted August 12, 2018 This is exactly what I am working on. Link to comment Share on other sites More sharing options...
Recommended Posts