>We use Brandson and another brands. The major problem is the
>parameter setting and fixture design. I think the horn is
>provided by outside vendors. To me ultrasonic welding
>is a good and cheap process if it works. If it fails, it is
>really a nightmare.
>
>Recently we have 50% to 100% failure for one of the new design
>which require IP67 protection. The Brandson people were consulted
>before the design and the process was qualified before the pilot
>run. However in the real pilot run, problems started to pop up.
>One potential problem is the tolerance of the plastic parts.
>The other problem may be due to the fixture design.
>
>For me I just want to learn some basics.
>
>Regards,
>Xiaofan
>--

It sounds like you're in for a crash course, depending on your level
of involvement.  There are a lot of variables in the process from raw
plastic to finished product.  I've been amazed at some of the
cause - and - effect relationships I've seen in manufacturing processes.
I wish you luck, Xiaofan.
Don't get tunnel vision - The process variable which is causing the grief
may not be the welder at all...

D.


D.

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