You mean four needles in parallel with one and the same pump, or four
needles with four pumps? Positive displacement, is that same as pumps
with Archimedes's screws?
Inge 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: den 8 februari 2008 09:59
To: [log in to unmask]
Subject: Re: [TN] absolutely crazy dispenser question


Syringes, no; needles, yes. I suggest that a positive displacement
dispenser feeding four needles that can be dragged through your assembly
would not be difficult to contrive. You would probably need about 12
gauge Luer Lock needles, depending on the quantity of paste needed and
the speed of withdrawal. This would not work well with electropneumatic
dispensers: you must have the positive displacement.

Any medical needle supplier will have something to suit: I used to have
ad hoc needles made for me by one in Switzerland for next-to-nothing.

Brian

Hfjord wrote:
> Hi all,
> 
> I have 100 mm long tube, quadratic cross section about 15x15 mm. It's 
> made up by 4 pcs double copper sided 'boards' put together to form the

> tube. I need dispense solder paste on INSIDE in all for corners and 
> all along the 100 mm length. Now, have you seen dispenser robotics 
> with syringes that long? I would like to dispense in all four corners 
> simultaneously, but that is probably to be a dream only.
> 
> No, I can't buy ready to use molded stuff, or other tubular things, 
> nor cut-and-wrap, or any else products. The 4-piece design is given 
> and unchangeable. And..I can't print solder paste on the individuals 
> for later putting together.
> 
> /Inge
> 
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