Electronics Forum | Fri Oct 19 04:47:19 EDT 2001 | genglish
No, we are not filling the syringes, to be honest the problem is not with the displacement syringes on our conventional method of placing glue, but purely with screen printed adhesive. That's the weird thing. (G)
Electronics Forum | Wed Dec 24 20:29:45 EST 2008 | xianhua_tang
Oh,I consider the process is wrong,it is stencil print paste-mount-reflow -apply glue-reflow,then wave solder. it must pass twice reflow,also the first reflow profile is different and the second .
Electronics Forum | Tue Jul 10 02:12:16 EDT 2012 | stano
Hi, when we change model from reflow temperature profile to temperature profile for glue, we always open oven to cool down. It is good for oven? Thank you for your answer.
Electronics Forum | Tue Jul 10 03:31:14 EDT 2012 | buckcho
Hello, the best way is to set the oven to cooldown. Opening the oven is not very good idea, but is not a big issue I think, only bad air in the production. Try if you can to make production from glue to Pb free if it is possible.
Electronics Forum | Mon Dec 22 11:09:21 EST 2008 | mfcat
We changed paste manufacturers rather recently and are now seeing SOT23s falling off after wave solder. These parts have a dual process... we stencil print paste, apply glue, populate then reflow. Only SOT23s fall off, chips are fine. We do not be
Electronics Forum | Thu Oct 18 21:42:47 EDT 2001 | davef
Are you filling your own syringes?
Electronics Forum | Tue Oct 16 09:17:10 EDT 2001 | davef
Look at "Microcanyons", Circuits Assembly magazine, December 1998. There D Pauls & T Munson describe adhesive on boards that was cured too rapidly and formed a skin that trapped volatiles and solvents. The volatiles and solvents created long voids i
Electronics Forum | Mon Dec 22 20:16:17 EST 2008 | davef
The first question in solving the "ol' SMT component loss after second-side wave operation" problem is: So, what makes you think the components actually came-off in the wave and not during some previous 'handling'? Putting that aside, we'll play thi
Electronics Forum | Sat Jul 25 04:48:40 EDT 1998 | Stoney Tsai
Hi, good friends I found this site is so wonderful to learn SMT techniques meaningfully. We now employ 3 Fuji GL-541 dispensors and raw material with Soma IR-120. but we found glue string casually. From my experience from trouble-shooting the cabinet
Electronics Forum | Tue Oct 16 11:51:26 EDT 2001 | bobm
i am using the epibond. i had alpha come in and look at our set up. they told me that the epibond can be reflowed at regular temp profiles with no problems. because i only have one oven and two pick n place machines it was important to be able to run
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