The outfeed is going to have to interface with a manual
insertion 'slide line', but with some kind of buffering, perhaps roller-chain
inbetween. Some kind of funneling action will be needed to center the boards
into that buffer coveyor - has anybody seen that done with roller or flat belt
conveyor as opposed to the vibrating table type?
Justin Braime
----- Original Message -----
Sent: Wednesday, August 11, 1999 1:23 PM
Subject: Re: [TN] Reflow outfeed conveyor
In a message dated 8/10/99 7:17:47 PM Central Daylight
Time,
[log in to unmask]
writes:
> Hi Guys,
> I'm in the process of looking at some
further automation on my SMT line,
and
> am stuck on the best way to
outfeed from a mesh
> conveyor only reflow oven.
> Any
thoughts, however wacky (Steve), would be gratefully
received....
>
> Thanks,
>
> Justin
Braime
> Process Engineer - Compuspec Industries
> 15a
Vestey Drive, Mt Wellington
> Auckland, New Zealand
> [log in to unmask]
>
Ph: +64-9-574 1982
> Fax: +64-9-574 1970
Hi
Justin!
However wacky? You sayin' I'm a wacky sorta guy? (DAMN! Even the
technetters
got me figgured out...crap!) Anyhoo, whatcha' wanna outfeed to
would be my
first question? To a magazine unloader? To a cleaner? (If you're
washing
things that is..) or just someplace where you can have a bit of time
to
collect everything and put the boards in tilt racks or whatnot? There's
these
little merry-go-round things that you can buy that will spin in
whatever rpm
you set and accumulate the boards for a bit 'till someone gets
down at the
end of the oven and starts racking the boards up, but I think
you'll wind-up
with a few boards with some damaged components after a while
from them
landing on top of each other. Then there's what's called a
vibrating table
that has conductive "plastic fingers" (if you will) with a
arm type "guide"
to funnel the boards into a magazine unloader which pushes
each board into a
magazine...
Simplimatic comes to mind as the vendor of
such equipment...I used these at a
past company, they were about $2,500 a
table. I'll check back on who it
really was for sure if you want me too...but
with that you still also need
the unloader at considerably more money if you
go that route...you can figure
at least $10,000-20,000 to completely automate
unloading from strictly a
mesh-belt. BUT, if you wanna get your boards into a
cleaner outta reflow, we
did things pretty simply at a memory company I
worked at in the past. We even
fed two ovens from the mesh belts into one
cleaner by just using flat-belt
conveyers...it was easy. Just need to
syncronize the belt travel on the flat
belt conveyers to match your oven belt
speeds so you don't make a big traffic
jam of boards...not that difficult.
Didn't need no 90-degree turn stations or
anything! (check my ascii-cad
drawing below...sure wish we could do
attachments on the technet!) BUT, we
still needed someone to rack the boards
up outta the cleaner...oh
well!
-Steve
Gregory-
___________________________
|
____________________________|
|
|
| Flat
belt--------------->
|
CLEANER
|
|
|____________________________|
_______________
|
|
|
|
|
|__________________________
OVEN
----->
|
|
|
|
---------------------------|
|
|
|
|
|
| Flat belt |
_______________
| /|\
|
|
| |
OVEN------->
|
|
|
|
|
---------------------------|__________|
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