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Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Securing components for wave soldering

#29491

Securing components for wave soldering | 14 July, 2004

I am looking for effective ways to secure through-hole components (non-clinched) to the boards for wave soldering. Can someone share their ideas or methods? We've tried vacuum packing & tacking/masking, but there must be better ways. I'd appreciate any ideas. Thanks!

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#29492

Securing components for wave soldering | 14 July, 2004

Bags of sand might work. For background discussions on this approach, search the fine SMTnet Archives on: bag* and wave

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#29497

Securing components for wave soldering | 14 July, 2004

I've had several customers use bean bags. There are a couple companies that will custom make them per size and weight. Other options are wave fixtures. You can contact me offline if you need more specific information

503-924-2747

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KEN

#29505

Securing components for wave soldering | 15 July, 2004

bean bags work great, but rarely need to be used. Are you having parts jump out when they hit the laminar, chip wave or both?

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pcbrown

#29506

Securing components for wave soldering | 15 July, 2004

Basically, it's a tilting problem of certain devices. Usually with axial by-pass caps tilting, which pulls the lead up through it's mounting hole. Other problems with components with leads cut to lenght to eliminate post-wave trimming. All suggestions, so far, point to bean bags. It may be worth a try.

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KEN

#29518

Securing components for wave soldering | 15 July, 2004

Yep, but its hard to contol small parts with the bags. They're good for DIP's and sockets, connectors, but radials are kinda hit and miss.

I bought mine from Pentagon EMS. They only use the finest european leather (kidding).

PENTAGON EMS 10950 SW 5TH STREET Suite 230 Beaverton, Oregon 97005 Tel:(503) 924-2747 Fax:(503) 924-2744

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pcbrown

#29532

Securing components for wave soldering | 16 July, 2004

I found a place that makes them and they are making some samples for me. Like anything else, I am sure there is a certain touch to placing the bean bags as to not disturb the parts. (Not sure if he uses fine Corinthian or basic cow hide ;)

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KEN

#29547

Securing components for wave soldering | 18 July, 2004

I walked in on two of our "Veteran" wave operators playing hacky-sac with a wave bag. I guess they don't have enough to do.

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pcbrown

#29551

Securing components for wave soldering | 19 July, 2004

LOL! I don't have to worry about that. The two guys I have probably don't even know what hacky-sack is!

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Omega

#29552

Securing components for wave soldering | 19 July, 2004

Try spraying flux on top of the loaded PWB when you put it on the conveyor. The tackiness of the flux does a pretty fair job of keeping the axial leaded parts down to the board. This takes more cleaning, but it has worked wonders for me on assemblies that have parts not held down any other way. By the by, I am using 186 Rosin Flux, not no clean

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