The UV cure masking works well but is cost prohibitive if you are trying to
keep costs low. I use it often when I beat up, I mean provide premier
service to those big aerospace companies like Doug's.
Seriously though, good masking and coating is more of art than a detailed
technical process. Send me a pic and I'll tell what to do to keep it high
quality with low effort.
Lloyd Duso
Diamond-MT
Plant Manager
(814) 535-3505
www.Diamond-mt.com
On Thu, Sep 3, 2015 at 12:49 PM, Adrian Dimulescu <[log in to unmask]>
wrote:
> I'm interested, please send.
>
> Thank You,
> Adrian
>
> -----Original Message-----
> From: Lee Hitchens [mailto:[log in to unmask]]
> Sent: Thursday, September 03, 2015 11:42 AM
> To: TechNet E-Mail Forum; Adrian Dimulescu
> Subject: Re: [TN] Selective Conformal Coat Systems
>
> Latex is a sure way of creating an opportunity to have the coating lift
> due to the continuous film you form across the latex and the board. We
> minimise the use as a masking material unless we want a barrier / seal for
> dipping or low profile SM connectors.
>
> Are you masking to the base of the board to form a complete seal between
> component and board surface to avoid flooding components? Is this required?
>
> If you can leave a small gap between masking and board with tape then
> there is a less likely chance that the coating will bridge (which leads to
> lifting sometimes). This technique is not without pitfalls if your sprayers
> are energetic in their application of coating as it can cause flooding.
> But, with practice on the sprayers part and resisting the temptation to
> apply too much coating at a time, it is a highly effective method and
> minimises repair after removal.
>
> I do have a presentation on masking if you want it that I can send to you
> off line. Its a little dated but it will certainly explain a little more
> clearly what I mean. Let me know and it will be on its way to you!
>
> Best Regards
>
> Dr Lee Hitchens
>
> SCH Technologies is a Division of SCH Services Limited
> Mob: +44 (0) 7862 25 33 21
> www.conformalcoating.co.uk<http://www.conformalcoating.co.uk> <
> http://www.conformalcoating.co.uk/>
>
> TECHNICAL SUPPORT SERVICE
>
> SCH Services Ltd offers a Technical Support Helpline to help address all
> issues relating to reliability. This includes contamination testing,
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> Please contact us via email or telephone:
>
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>
> On 03/09/2015 16:23, "Adrian Dimulescu" <[log in to unmask]> wrote:
>
> >We're using Humiseal TS300 (Pink Bubble-Gum type), the lifting occurs
> >when we try to pick the mask from around and on top of the components.
> >We tried masking with tape and lining the tape with the Humiseal TS300,
> >though this works, it's time consuming.
> >
> >What material and technique do you use?
> >
> >Thanks
> >
> >-----Original Message-----
> >From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
> >Sent: Thursday, September 03, 2015 11:01 AM
> >To: [log in to unmask]
> >Subject: Re: [TN] Selective Conformal Coat Systems
> >
> >I agree with Lloyd, if you are damaging components during demask, you
> >are using the wrong materials and the wrong techniques.
> >
> >Trot them out here where we can see em and we'll help ya out.
> >
> >
> >Doug Pauls
> >Principal Materials and Process Engineer Rockwell Collins
> >
> >On Thu, Sep 3, 2015 at 9:55 AM, lduso - Diamond-MT.com
> ><[log in to unmask]
> >> wrote:
> >
> >> That sounds more like the problem, masking technique. We mask
> >> hundreds a day and rarely damage anything. It's all in using the
> >> right technique and as Steve said, the right material.
> >>
> >> What coating are you using?
> >>
> >> Lloyd Duso
> >> Diamond-MT
> >> Plant Manager
> >> (814) 535-3505
> >> www.Diamond-mt.com<http://www.Diamond-mt.com<http://www.Diamond-mt.com<
> http://www.Diamond-mt.com>>
> >>
> >> On Thu, Sep 3, 2015 at 10:43 AM, Adrian Dimulescu
> >> <[log in to unmask]
> >> >
> >> wrote:
> >>
> >> > That¹s what we¹re doing now, the issue is removing the mask as it
> >> > will occasionally lift a pad or component. We¹re looking to do
> >> > away with masking.
> >> >
> >> >
> >> >
> >> > Thanks
> >> >
> >> >
> >> >
> >> > ------------------------------
> >> > *Adrian Dimulescu | Advanced Engineer | MtronPTI (NYSE MKT: LGL)*
> >> > 2525 Shader Rd, Orlando, FL 32804
> >> > Office: 407.298.2000
> >> >
> >> >
> >> >
> >> > *From:* lduso - Diamond-MT.com [mailto:[log in to unmask]]
> >> > *Sent:* Thursday, September 03, 2015 10:41 AM
> >> > *To:* TechNet E-Mail Forum; Adrian Dimulescu
> >> > *Subject:* Re: [TN] Selective Conformal Coat Systems
> >> >
> >> >
> >> >
> >> > That low a volume, mask and spray by hand.
> >> >
> >> >
> >> > Lloyd Duso
> >> >
> >> > Diamond-MT
> >> > Plant Manager
> >> > (814) 535-3505
> >> >
> >> > www.Diamond-mt.com<http://www.Diamond-mt.com<
> http://www.Diamond-mt.com<http://www.Diamond-mt.com>>
> >> >
> >> >
> >> >
> >> > On Thu, Sep 3, 2015 at 10:39 AM, Adrian Dimulescu <
> >> [log in to unmask]>
> >> > wrote:
> >> >
> >> > Hello All,
> >> >
> >> > We're looking into purchasing a small (bench-top type) automated
> >> selective
> >> > conformal coat system. This will be used for 100 or so boards a
> >> > week, therefore speed is not an issue. It is important that the
> >> > system is selective as we only want to coat specific areas on the
> >> > board. I wanted
> >> to
> >> > get a feel for what other are using and/or recommend.
> >> >
> >> > Many Thanks
> >> >
> >> >
> >> >
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> >________________________________
> >Adrian Dimulescu | Advanced Engineer | MtronPTI (NYSE MKT: LGL)
> >2525 Shader Rd, Orlando, FL 32804
> >Office: 407.298.2000
> >
> >
> >
> >
> >
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> ________________________________
> Adrian Dimulescu | Advanced Engineer | MtronPTI (NYSE MKT: LGL)
> 2525 Shader Rd, Orlando, FL 32804
> Office: 407.298.2000
>
>
>
>
>
>
> CONFIDENTIALITY NOTICE:
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