Hi Kyle:
> I presently use a system of lot marking codes with a simple one-page
> document that is shipped with each batch of parts from the vendor. The
> document has the name of the vendor's QA person in signature and the
> relevant lot numbers for each shipment from the factory and the exact
> plastic material name and/or number with the UL 94xxx flame rating. All I
This is also what you get if the fabricator subscribes
to the UL fabricator's program and you request that your
plastic parts be provided under the UL program! We let
UL handle all of this for us through its fabricators
program!
> Many times a plastic part is used as a subassembly into a finished part.
> The problem with this system is that tracing back a part number for a
> finished part may not lead one into the subassembly part(s) so a disconnect
> will occur making it difficult and time consuming to trace some parts to the
> source unless you maintain a listing of parent part numbers and drawings for
> inclusion to finished assemblies. This also means you must keep the list
> current as engineering/manufacturing changes.
UL has a new program, the Sub-assemblers program, which
addresses this. No problem if the sub-assembler is a
part of the UL program!
> I have wanted to switch to a system similar to what Pryor uses, but with
> dozens of individual parts, this will easily become an arduous task for me
> and I'm not sure if it is acceptable anyway. If I'm gonna go to all that
If you use the UL fabricators and sub-assembly programs,
all of this is done for you by the fabricator and sub-
assemblor.
Marking of parts and sub-assemblies has many options under
the UL programs: molded-in markings, separate certification
sheets, box labels, individual part labels, almost anything
you want. We leave it up to the fabricator/sub-assemblor by
simply stating the certification is marked according to the
UL standard (i.e., UL 746D).
Best regards,
Rich
-------------------------------------------------------------
Richard Nute Product Safety Engineer
Hewlett-Packard Company Product Regulations Group
AiO Division Tel : +1 858 655 3329
16399 West Bernardo Drive FAX : +1 858 655 4979
San Diego, California 92127 e-mail: [email protected]
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