Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 23 Feb 2000 18:06:12 EST |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
In a message dated 02/23/2000 3:40:31 PM Central Standard Time,
[log in to unmask] writes:
<< Hi Techneters,
This questions is mostly geared towards the small manufacturers that does
not use that much paste, but all comments are welcomed. Most manufactures
recommend you store your paste in a refrigerator and keep the temperature at
32-50°F. We do this, but since we do not use that much paste, we will open
a jar and apply the required amount of paste on our stencil. Our biggest
production amount only requires us to apply paste to our stencil maybe twice
or three times a day. I was told by an outside source that once we open the
jar of paste we can not put it back in the refrigerator. One reason they
said was we are exposing the paste to the air and once this happens you need
to use the paste ASAP. That's a problem for us since we do not use that
much to begin with. Currently, we will open the jar and take what we need
and then put the jar back into the refrigerator, it may be two days before
we need to use the paste again. How do the small shops handle their paste?
Thanks in advance,
Jim West >>
Hi Jim!
Most paste manufacturers also supply the paste in syringes of various sizes
(for instance I get mine in a 600 gram tube), that are mainly for printers
that have a auto dispenser. I don't actually use the auto dispenser on my
printer (we don't run big enough jobs to use it). But what I do have is a
caulk gun (got it at the hardware store) that I put my solder paste tube in
to dispense my paste with...works great too, the diameter of the opening at
the end of the tube is about as big around as your thumb (the same size as
the bead of paste that you want in front of your squeegee) and after I
dispense the paste on the stencil, I screw the plug back in the end of the
tube and put it back in the refridgerator.
The only paste that was exposed to the air is the paste that I pumped outta
the tube. I like the tubes or syringes for another reason too, discourages
you taking paste that's already been out on the stencil and then putting it
back in the tube (you could do it I suppose, but not without making a big
mess). With a jar, something like that is easy to do....
-Steve Gregory-
##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe: SUBSCRIBE TECHNET <your full name>
To unsubscribe: SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################
|
|
|