Design Help
thanks for your questions:
1. looked at your design. seems to be wrong to me presently.
2. what are you trying to separate from the puffed wheats
3. what opening spec are you attempting to make for the product, 100% passing what size please?
4. Angle can be determined after those questions are addresse
5. the mechanical design lads in our forum can help with the mathematics of the actual design of the offsets, etc but, generally speaking, you would need a very small eccentric offset or STROKE (circle size) to scalp ....say debris or contaminants out of mr PUFFED Wheat....
6. Do not order the VSMA......:>) per your request.
good luck. GB Moderator ■
More Stuff
1. might consider making top deck full...........and discharge overs in line with direction of travel of material. VS making the material passing, try to STOP and move in the opposite direction to discharge down the pan length. I think this will stall this lightweight material and could be problematic.
2. why not have all material (passings or thrus) just drop straight down into a receiving hopper? easier.
3. you would probably have to install a nice HIGENIC PLASTIC food grade on the carrying pan or stainless.....
4. YOUR circle would NOT have to be large......at all....maybe 1/8" or 3/16" max max.....and the speed would probably correspond to a range of say......1050-1200 rpm. ■
Reply To Ur Questions& Few More Doubts
thanks for the reply sir ,
the material to be screened is fine dust ,small debris and half baked puffed rice.
the reason for designing a screen with two screens oppositely inclined are:
1]there are few space constraints (i.e i cant increase the size of screen), the screen size are 4ft*2ft.
2] the problems faced during screening manually are, if i go with screen with mesh no.8, the fine dust is removed from the material, but the small debris and half baked puffed rice cant be removed . if i go with screen with mesh no.6,the problem is that along with the debris ,the required product also fall down, reducing the productivity.
so how to go about screen distribution??? if i go with a single screen as per your advice.....
am looking for a capacity of 120kg/hr
what should be the range of screen tilt angle......
.................................................................................................... ..........
is it compulsary that the shaft should be placed exactly where the C.G lies?
looking forward for ur assistance..... ■
Cg Of Drive
1. it is normal to centre the drive in the centre of gravity of the box .....but, i must tell you i have seen many screeners that have the drive move towards the feed end say 12" to effect more STROKE ACTION at the feed end, theoretically where the load is heavier and needs more action and effects less stroke action at the discharge end of the screener box.......where the load is already somewhat lighter. ■
Opening Size
it may be that you need to design a different type of vibrating screen due to TIGHTNESS of installation footprint. THIS HAPPENS.
You would have to pic a wireclth, probably stainless steel for hygene, seems like 8mesh may be the key...or go to two deck screen with 6mesh over 8mesh.....
but a flat vibrating design. maybe like a ROTEX circular type.
Sweeping action, xl with fine opening cuts.....not a huge stroke needed at all...fits into a nice tight footprint and can be designed with 4,5,6 foot diameter for capacity and slotted opening to increase production.
GOOGLE ROTEX....SCREENERS.....under image tab. ■
Sorry Mispoke Myself
ROTEX is a rectangular sweeping motion vibrating screen. ■
Design For Conveyor Components
I want the designs & drawings for conveyor components,mainly idlers,transomes,self aligning frames, and end pulleys.how should i proceed.where can i find these? ■
For Sizing Those Components...
try this link please:
1. http://www.prodsel.ptwizard.com/conv...nitConveyor.do
2. if you email any rubber belt conveyor manufacturer, they will gladly send you full specs on their idler assemblies in their catalogues at no charge.
FMC, CONTINENTAL CONVEYOR, HAACK, PRECISION, LUFF CONVEYOR COMPONENTS.
hope this helps a bit. ■
Idler Assemblies Supplier Page Link
Wire Screen
We sell a lot of mesh and screens to the guys that make these vibrating screens, if you are interested in some more material or different samples of different sizes, go to the site....
http://www.bwire.com/
j ■
Designing a Vibrating Screen
guidance for designing a vibrating screen
I am a final year student of mechanical engineering. as a final year project am designing a two deck vibrating screen for separation/ cleaning of puffed rice (puffed rice is really light in weight ), with both screens inclined in opposite direction, using a single shaft & eccentric wts on both sides & the whole body is suspended on four springs. i have attached the image of the screen that am planning to make.
as i dont have any experience , i want you guys to go through the image and guide me ,as in which are the areas where i could go wrong .
i would be thankful 2 u guys if u help me in following problems.
1}what should be the range of tilt angle for both the screens
2} how to design coil spring
3}how to decide the amplitude and frequency of vibrations
and guys plz dont suggest me to buy vsma handbook coz i really dont have that much time to wait.
looking forward for your support.
thank you.[/LEFT]
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