Amol,
In my opinion, "Zero Emissions" exists only in the minds of regulators and
salesmen. What they are talking about is a positive air flow spray booth
that sucks all VOCs into one air stream. That air stream becomes
subsequently filtered, usually through a charcoal medium, such that any
exhaust from the filter contains no VOCs or other regulated emissions. If
your spray booth exhaust is not filtered, even if properly permitted, then
it has emissions.
Doug Pauls
Rockwell Collins
"Kane, Amol
(349)"
<akane@HARVARDGRP To
.COM> [log in to unmask]
Sent by: TechNet cc
<[log in to unmask]>
Subject
[TN] Zero Emissions Spray Booth
02/16/2006 08:11
AM
Please respond to
TechNet E-Mail
Forum
<[log in to unmask]>
; Please respond
to
"Kane, Amol
(349)"
<akane@HARVARDGRP
.COM>
Dear TechNetters,
A question was recently asked by a customer whether we have a "Zero
Emissions Spray Booth" for conformal coating applications. We spray
polyurethane, acrylic, epoxy and silicon coatings. We have an exhaust type
spray booth to remove harmful vapors from the coating room. Can anyone shed
some light on the Zero Emissions Spray Booth concept so that I can evaluate
our existing infrastructure against the requirements and make upgrades if
necessary.
Thanks in advance,
Amol Kane
M.S (Industrial Eng.)
Process Engineer
Harvard Custom Manufacturing
941 Route 38 Owego, NY 13827
Phone: (607) 687-7669 x349
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon
Sent: Thursday, February 16, 2006 8:33 AM
To: [log in to unmask]
Subject: Re: [TN] BGA Reflow profile - Thermocouples
Hi Dominic:
It should not cost you much to find out what is the temperature
of a board through reflow. The investment of buying a Mole or other
similar device, that will allow you to record the profile of a board
through an oven is only "once". If you are using eutectic solder and
your coldest components sees 20 degrees over the melting point which is
203 C and you are not exceeding the highest temp that the most
sensitive component may withstand, then you have a working profile, that
simple.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dominic Boudreau
Sent: Wednesday, February 15, 2006 5:50 PM
To: [log in to unmask]
Subject: [TN] BGA Reflow profile - Thermocouples
Hello Techneter's,
I am working on a procedure to make the reflow profile of a PCB.
What are the techniques to know where to attach the thermocouples on the
"PCB"? I already know that it should be where we have the coldest and
hottest spot but is it possible to know when we "must" test a BGA to
have a better reflow profile. We are a little company so we don't have
the money to test a BGA each time we have one on a PCB.
Thank you
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