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P. 5 Homemade valves

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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P. 5 Homemade valves

Unread postAuthor: Antonio » Thu Jan 03, 2008 7:53 am

Different kinds of valves I made and that work:

1 Poppet valve with ballpoint spring, 90 degrees bend flow

2 Tippmann type of valve, two poppet valves on two sides, can be used for blowback designs

3 Drozd sliding valve, slides forward and takes a bb then gives a burst of air
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Attachments
valve 1a.JPG
valve 1
valve 1d.JPG
valve 1
valve 1c.JPG
valve 1
HPIM8071.JPG
Valve 2
HPIM8068.JPG
Valve 2
HPIM8086.JPG
Valve 2 with blowback tube from pvc
HPIM8076.JPG
Valve 3
HPIM8077.JPG
Valve 3
HPIM8067.JPG
Valve 3
HPIM8072.JPG
Valve 3 without orings
HPIM8074.JPG
Valve 3 with orings
HPIM8075.JPG
Valve 3 without orings and tube
HPIM8080.JPG
Airsupply tube
tippmannproliteanimation.gif
Tippmann type of valve
tippmannproliteanimation.gif (7.67 KiB) Viewed 34605 times
stacked tube airgun smaller.gif
stacked tube
Last edited by Antonio on Tue Jan 15, 2008 3:25 pm, edited 7 times in total.
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Unread postAuthor: jackssmirkingrevenge » Sat Jan 05, 2008 12:23 am

again, very impressed with what you manage to accomplish using only basic parts and facilities, kudos for thinking out of the box :)
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Unread postAuthor: jon_89 » Sat Jan 05, 2008 1:02 am

Could you please explain how these work. Did I over look something because I have no idea how these are suppose to work. Though they do look very simple.
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Unread postAuthor: jean » Sat Jan 05, 2008 2:53 pm

very impressed! the best is you use parts are all aviable in homedepot

nice nice nice :!:

jean
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Unread postAuthor: ALIHISGREAT » Sat Jan 05, 2008 2:57 pm

wow nice valves although i don't quite understand what stops all the air being released on the stacked tube valve design?
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Unread postAuthor: Antonio » Sat Jan 05, 2008 3:48 pm

ALIHISGREAT wrote:wow nice valves although i don't quite understand what stops all the air being released on the stacked tube valve design?


On the animation of the green part is a screw it has a spring at the back which keeps it closed. The o ring is colored red. When the hammer (brown) hits back the poppet valve gives a short burst of air. Bc of the air pressure and the spring behind the valve it closes again.


Image
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Unread postAuthor: iknowmy3tables » Sat Jan 05, 2008 4:29 pm

very nice, these popet valves are just like the ones on blow guns but usually when you make them much larger they become too hard to operate so it requires the force of a nice hammer blow I've recently noticed that moded pizeos can be used to made hammers to strike the valve instead of the piezo crystal

oh and the holes on valve 3 are way too small if your afraid of making it too long (but so for its fine) you can make a slot probably with a saw

the rod on valve 1 is not quite clean enough looks like you ghetto drill press lathed it, do you have some tap and dies you could thread the tip of a rod and add nuts and a washer or sleeve it in some tubing
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Last edited by iknowmy3tables on Sat Jan 05, 2008 4:46 pm, edited 1 time in total.

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Unread postAuthor: Antonio » Sat Jan 05, 2008 4:35 pm

iknowmy3tables wrote:oh and the holes on valve 3 are way too small if your afraid of making it too long (but so for its fine) you can make a slot probably with a saw


Yeah you are kinda right. The problem is that the holes are not supposed to rip open the orings lol. So yeah its kinda hard. But my main problem on the sliding valve is that it moves really ...viscid. Too slow for fast operation due to the orings.
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Unread postAuthor: iknowmy3tables » Sun Jan 06, 2008 3:08 pm

I see well I made you a diagram for the possible fabrication improvements you can try
Image
don't forget to add lots of good lube

hey while making that picture I got an idea It might have been thought of before or it is just the similar to mentioned designs, but this looks like it might have more success
Image
edit: now I remember those special blow forward designs, its a twist of those but I still like I think it will be easier to build
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Last edited by iknowmy3tables on Wed Jan 09, 2008 7:07 pm, edited 1 time in total.

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Unread postAuthor: ALIHISGREAT » Sun Jan 06, 2008 4:08 pm

ant wrote:
ALIHISGREAT wrote:wow nice valves although i don't quite understand what stops all the air being released on the stacked tube valve design?


On the animation of the green part is a screw it has a spring at the back which keeps it closed. The o ring is colored red. When the hammer (brown) hits back the poppet valve gives a short burst of air. Bc of the air pressure and the spring behind the valve it closes again.


Image


ahh yes i must have missed that :oops:
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Unread postAuthor: Antonio » Sun Jan 20, 2008 3:15 pm

iknowmy3tables wrote:I see well I made you a diagram for the possible fabrication improvements you can try
Image
don't forget to add lots of good lube

hey while making that picture I got an idea It might have been thought of before or it is just the similar to mentioned designs, but this looks like it might have more success
Image
edit: now I remember those special blow forward designs, its a twist of those but I still like I think it will be easier to build


Thanks allot for ur ideas! Ill try and implement them into my new designs and creations.
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Unread postAuthor: Antonio » Sun Jan 20, 2008 3:16 pm

ALIHISGREAT wrote:
ant wrote:
ALIHISGREAT wrote:wow nice valves although i don't quite understand what stops all the air being released on the stacked tube valve design?


On the animation of the green part is a screw it has a spring at the back which keeps it closed. The o ring is colored red. When the hammer (brown) hits back the poppet valve gives a short burst of air. Bc of the air pressure and the spring behind the valve it closes again.


Image


ahh yes i must have missed that :oops:


I know my animations arent that good, its was my first try making this gif. Its sometimes hard to oversee designs on this forum, I think I am ganna use flash in the future.
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Unread postAuthor: judgment_arms » Sun Jan 20, 2008 3:41 pm

Ant, between you and jack I’m really beginning to fell like a slacker, ‘cause I’ve bean working on the same type thing as you two, and I still ain’t got nothin’ to show…
Oh, well.

I got a question about the trigger group on your second animation, the one entitled “stacked tube airgun smaller.gif”, they way that spring is positioned it’ll keep the sear designated, is this intentional, and if so why?

But anyway, nice work.


Now in order to get rid of my feeling of sackerdom, I think I’m going to go work on finishing my rifler…
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Unread postAuthor: Antonio » Tue Jan 22, 2008 8:46 am

[quote="judgment_arms"]Ant, between you and jack I’m really beginning to fell like a slacker, ‘cause I’ve bean working on the same type thing as you two, and I still ain’t got nothin’ to show…
Oh, well.

I got a question about the trigger group on your second animation, the one entitled “stacked tube airgun smaller.gif”, they way that spring is positioned it’ll keep the sear designated, is this intentional, and if so why?
quote]

Hey nice to hear from ya! Its nice that lots of ppl are feeling boosted by all these projects here. To be honest though I have been working on these airguns for some years already. So not that it seems like that my project pop out of the ground like mushrooms.
The trigger, yeah the animation is actually wrong. As in this gif program I used I coudnt rotate objects so I wasnt able to make a good animation. Now that I look closer.. the spring should be at the backside of the sear and not at the front close to the triggers pad. Ill change this, thnx for telling me. Shows atleast some ppl are looking closely to my postings. Btw the spring doesnt have to be a pressure spring, it could also be a tension spring, so ill leave it to that for now :)
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Unread postAuthor: iknowmy3tables » Wed Jan 23, 2008 3:06 pm

I'm surprised you actully took the time to make those animation nice job I thought you found them on the internet nice,

also for some seals your may want to try the threaded rod and sheet rubber between washers thing you need washers that practically touch the walls of the pipe, in my case I had to grind down larger washers, for sheet rubber I used a tire tube the great thing about this is that you can ajust the seal by tightening the nuts that squezes the rubber out ward
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