I'm probably mistaken, but it would seem that just having the plastic material marked on the parts would not be enough proof because of the chance of mis-marking. Have I missed something here? This just seems too easy.
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 do then for the inspector, is pull the recent shipment tracking sheet from our receiving/inspection department as filed under the part number and let him/her witness the document and a few of the marked parts from the bin on the assembly line... There should be a caveat here: 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. -blech! 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 effort I'm also going to combine the markings to include a plastic material name/number, flame rating and the chasing arrows (recycling) mark. This would satisfy the UL inspector, the 'greenies' and life's end recyclers. I know for a fact that IBM uses a system such as this now along with the 'recognized component' mark, but it seems to me that this mark would lend the credibility to make such a system acceptable...am I expecting too much? Btw, Hello Pryor !! Kyle Ehler kyle.eh...@lsil.com <mailto:kyle.eh...@lsil.com> Assistant Design Engineer LSI Logic Corporation (formerly NCR, AT&T GIS and Hyundai) 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8889 Fax 316 636 8315 -----Original Message----- From: PRYOR MCGINNIS [SMTP:c...@prodigy.net] Sent: Saturday, September 18, 1999 9:43 AM To: Price, Ed; emc-p...@ieee.org Subject: Re: help I have experienced good results by requesting the Part/Component molder to mold the plastic identification in the part/component. Pryor McGinnis c...@prodigy.net -----Original Message----- From: Price, Ed <ed.pr...@cubic.com> To: 'emc-p...@ieee.org' <emc-p...@ieee.org> Date: Friday, September 17, 1999 11:04 PM Subject: FW: help > >Posted for john.linst...@gefgreenville.ge.com > > > > > > > > >:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) >Ed Price >ed.pr...@cubic.com >Electromagnetic Compatibility Lab >Cubic Defense Systems >San Diego, CA. USA >619-505-2780 (Voice) >619-505-1502 (Fax) >Military & Avionics EMC Services Is Our Specialty >Shake-Bake-Shock - Metrology - Reliability Analysis >:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > >> -----Original Message----- >> From: Linstrom, John (IndSys, GEFanuc, CDI) >> [SMTP:john.linst...@gefgreenville.ge.com] >> Sent: Friday, September 17, 1999 2:44 PM >> To: 'Price, Ed' >> Subject: RE: help >> >> >> My question: we have a UL mark on a box we build. One of the requirements >> that the auditors check is flammability of materials. 2 parts give us >> trouble - a molded bezel and a plex screen. Both are materials purchased >> elsewhere by our fabricators. UL says either assemble a 'paper trail' that >> shows continuous control of the materials, or use a 'recognized >> fabricator' (read buck$) to make our parts. Neither fab. house is >> recognized or wants to be. UL is VERY evasive about the required >> documents for the 'trail'. Any one have this experience - and succeed? >> Thanks- >> >> John Linstrom >> Computer Dynamics >> PH 864.281.7768 x266 >> FX 864.675.0106 >> john.linst...@cdynamics.com >> >> > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to majord...@ieee.org >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to ed.pr...@cubic.com, >jim_bac...@monarch.com, ri...@sdd.hp.com, or >roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
