Where are the nuts? Are they embedded in the board? Generally, the glue should be added between screw and nut.







Best Regards,



James Liu 刘春光

Director, IPC China Training Centers/Technology 培训中心主任/技术总监

IPC China



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发件人: TGAsia [mailto:[log in to unmask]] 代表 Jakey Chen

发送时间: 2012年1月31日 11:52

收件人: TGAsia

主题: Re: [TGAsia] repair issue about PCBA



Hi all:



We meet a problem, when we finish producing PCBA, after test, we assemble a mechanical part with screw together with PCBA, sometimes, bad screw caused it can not be tight. We do repair with glue. You can see the pic as bellows:



The 1st and 2nd picture below, we used glue between bottom of current core and top of board.

The 3rd picture, we used the same glue on screw to maintain it.

Glue information:

Shear strength >20Mpa(200kg/cm2) after 24 hours

It can be used in -60~+120 ℃ and it is insulating.



I want to ask whether there are IPC standard for this ?





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B&R

Jakey





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