Ampule Spinner

Discussion in 'The Projects Forum' started by Iron Monkey, Nov 6, 2014.

  1. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    hi all,

    This is new to me, I am trying to build a small ampule spinner or hire some to do it if I cant. It doesn't seem to complicated. What do I need to buy and where can I get these items.

    Here's a link to what I want to build.
     
  2. sirch2

    Well-Known Member

    Jan 21, 2013
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    It's just a geared motor by the look of it. What country are you in? Most electronics retailers, e.g. CPC, Maplin or model shops will sell a suitable geared motor.
     
  3. wayneh

    Expert

    Sep 9, 2010
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    Cute. I always did it by hand. Even a free-spinning platter would help a lot. Something with enough mass that, once you give it a push, it will keep spinning on it;s own. I'd scavenge the bearings and platter from an old hard drive and go from there. Or maybe get some roller-blade bearings.

    The guts from an old VCR would also have a nice spinning motor.
     
  4. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Free-spinning, inertia-driven platters are used in microbiology laboratories for plating some specimens, such as urine, on agar.

    However, a torch with flames on opposite sides also works well and the vial does not need to be rotated.

    John
     
  5. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    I'm in the U.S. so this is pretty simple right. I'm still not sure where to start but I'm starting to make sense out of it
     
  6. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    Yeah it's nice, pretty cool little sealer idea.
    I also do it with my hands now which takes longer, this would help a lot.
     
  7. sirch2

    Well-Known Member

    Jan 21, 2013
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    Sorry, I'm not in the US so can't really recommend a supplier, but yes it's pretty simple, basically a motor plus turntable plus battery.
     
  8. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    I just looked up a microbiology turntable like I mentioned above:

    upload_2014-11-6_15-34-56.png

    The Cole-Palmer price is outrageous, as you might expect.

    Here's a YouTube showing how they work:



    They are really quite easy to operate and probably simpler to build than a motor driven unit.

    John
     
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  9. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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    Are all the ampules you wish to seal the same size (particularly diameter)?
     
  10. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    This could be an option. I see how that could work. But I would have put an attachment on the platter to hold the ampule.
     
  11. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    Yes for now they are. There about 22.5 mm or 0.9 inches diameter.
     
  12. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Anything you make will require something to stabilize the ampule. I suggest a holder with 4 wings and a spring connecting the tops. Those devices are extremely common on all varieties of flask shakers and rotators. Their advantage is that a small range of sizes will fit the same holder.

    upload_2014-11-6_16-49-58.png

    John
     
  13. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    This motor looks like it would be easy to incorporate: All Electronics, Cat # DCM-428, 3 V DC, 70 RPM, $ 7.00.
     
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  14. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    This could work too. I looked up the turntable. They are pricey for just the table.
     
  15. Iron Monkey

    Thread Starter New Member

    Nov 6, 2014
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    This definitely looks like it could be used to build one like In the video I posted. Then I just need the other parts and instructions to do it. I would have prefered to order one but it doesn't seem to be hard to make one.
     
    Last edited: Nov 6, 2014
  16. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    You seem to be comparing a DIY powered table with a purchased laboratory one. Laboratory prices are inflated at least 50% because of the discount structures. A used one would be even cheaper; however, making one should not be hard. A small disk cut from a suitable steel round placed on a bearing would work.

    Alternatively, almost any small motor that spins freely could be placed vertically. Then add a wood disk to the shaft for your ampule. The armature of the motor should have sufficient momentum to keep the platform spinning long enough.

    John
     
  17. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    Hola john

    In actual use, is it one speed for all, a range to chose from or adjustable?

    What could be the longest time one of these could be required to spin?
     
  18. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    The commercial inertia turntables will rotate for more than enough time to seal an ampule. My use of them was for plating cultures. The advantage is that the speed is relatively slow and is easily controlled by the user as shown in the video. I have no idea what the longest free rotation time would be. A re-purposed motor with a wooden platform would probably rotate less than one with a heavier platform.

    If the OP has access to a small lathe, he could make a very nice one in a short time. Getting a nice round cut from a larger piece might be difficult, depending on where one lives. In Cleveland, such pieces are easy to obtain. I have also used Speedy Metals (http://www.speedymetals.com/), which had some nice ones on sale several months ago. Rounds cut to various thicknesses are a common starting piece for lathe operations. For this device, I would probably start with a 3" to 4" diameter piece about 1/2" thick. A cheap radial ball bearing (electric motor grade) for a 1/2" to 5/8" shaft should suffice, because the loading is almost negligible for that bearing.

    John
     
  19. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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    Could you post a picture of an empty ampule? What I envision is apparently different than some others, and I wonder if some of the proposed solutions could work.

    I've started on some sketches, but would like to see an empty ampule before posting anything.
     
  20. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    http://en.wikipedia.org/wiki/Ampoule

    Ampoules often have a constriction in the neck, as shown, but not always. The constriction makes opening easier. Much of the work I did was with ampoules made by attaching a piece of 6-mm glass tubing to the open end of a test tube. Those ampoules were sealed under high vacuum, so rotation was not practical. I just used a single torch and learned to heat the circumference evenly. In the instances when the ampoule was not attached to a vacuum line, I just rotated it between my fingers.

    John
     
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