Technet, You might consider the use of wave solder pallets with appendages that are spring loaded or sponged that hold down critical components during wave. This will make it easier to maintain a consistant profile for your assembly and allow the pcb and flux to be preheated to achieve maximum soldering results. BW ______________________________ Reply Separator _________________________________ Subject: Re: WAVE SOLDER SANDBAGS Author: [log in to unmask] at uucpmail Date: 5/19/97 4:48 AM In message <[log in to unmask]> Daryl Muma writes: > I'm looking for info on "sandbags", or similar techniques, used to > prevent the unseating of larger thru-hole components from PCB's through > the wave solder process. Any vendors, contacts or experience is > appreciated. Daryl, I've not seen these offered commercially before. However, you might consider making up some yourself. You can buy high temperature 'beans' or 'peas' (not sure what they _actually_ are) from a cooking shop. They are used to keep an otherwise empty pie crust flat when baking - you fill the pie with these things, bake, then remove and fill the pie with some yummy stuff at a later date. They should withstand topside wave solder temperature OK. Just sew them into some sort of bag... hmm, perhaps made from a non-flammable fabric. The idea works OK for the right problem. Pretty cheap too. They might get a bit flux-fumey after a while, so perhaps best thought of as a consummable. If you try it, please let us know how they work. Peter P.S. 'Baking' AND 'Sewing' on TechNet - what next? -- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Peter Swanson Oxfordshire, England INTERTRONICS [log in to unmask] http://www.cygnetuk.demon.co.uk Suppliers of materials and consumables to the electronics & related industries ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************