Need a Permaneant Marking on Delrin
Need a Permaneant Marking on Delrin
(OP)
I have two objects made of black delrin that need to be alligned properly in the field. I would like to put some sort of white or colored marking on each object that would show that the objects are alligned properly. I'm having trouble finding a way to make a permaneant mark (this is a medical device so it will be cleaned thoroughly between uses). Any suggestions or advice?





RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
Cost wise may not be possible and could be a trap for germs but it's an idea.
I'd say fill the scribe line with some marking medium but that takes you back to step 1.
KENAT, probably the least qualified checker you'll ever meet...
RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
Heckler![[americanflag] americanflag](https://www.tipmaster.com/images/americanflag.gif)
Sr. Mechanical Engineer
SWx 2007 SP 4.0 & Pro/E 2001
o
_`\(,_
(_)/ (_)
"Avoid the base hypocrisy of condemning in one man what you pass over in silence when committed by another." -- Theodore Roosevelt
RE: Need a Permaneant Marking on Delrin
KENAT, probably the least qualified checker you'll ever meet...
RE: Need a Permaneant Marking on Delrin
Heckler![[americanflag] americanflag](https://www.tipmaster.com/images/americanflag.gif)
Sr. Mechanical Engineer
SWx 2007 SP 4.0 & Pro/E 2001
o
_`\(,_
(_)/ (_)
"Avoid the base hypocrisy of condemning in one man what you pass over in silence when committed by another." -- Theodore Roosevelt
RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
Heckler![[americanflag] americanflag](https://www.tipmaster.com/images/americanflag.gif)
Sr. Mechanical Engineer
SWx 2007 SP 4.0 & Pro/E 2001
o
_`\(,_
(_)/ (_)
"Avoid the base hypocrisy of condemning in one man what you pass over in silence when committed by another." -- Theodore Roosevelt
RE: Need a Permaneant Marking on Delrin
RE: Need a Permaneant Marking on Delrin
I'm not convinced that anything will really survive autoclaving and scrubbing, repeatedly, but they'd be my first port of call.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Need a Permaneant Marking on Delrin
I wonder if you could drill a hole in your black part, and have it filled with a contrasting color molten delrin, resulting in a fused in spot of different color.
RE: Need a Permaneant Marking on Delrin
Then boil it in Rit dye.
Then laser engrave it.
( For about 20..30 minutes, the dye doesn't affect the Delrin, at all. Then, just when you begin to wonder if you followed the directions right, it proceeds from a light to a dark shade in just a few minutes. )
Mike Halloran
Pembroke Pines, FL, USA
RE: Need a Permaneant Marking on Delrin
POM is available with pigmentation which can be colour changed by laser - the black base gives a light green mark - pale colours which go darker are obviously better. The sample black I have seen (years ago) was quite acceptable for say, an id number or other functional marking.
I think Ticona make the stuff, but Du Pont may also do it:
http
Cheers
Harry
RE: Need a Permaneant Marking on Delrin
There are plenty of contract laser marking shops. Laser marking doesn't cost much per piece, especially if you have the volume to amortize the setup charge.
As a test, you can contact companies that sell laser markers, ask their Applications Engineering Department about marking Delrin, and they typically will do free samples for you. This will lead you to the required process parameters of CO2 versus Nd:YAG lasers (or even the more exotic laser types), power levels, pulse rate requirements, traverse speed requirements, etc.
TygerDawg
Blue Technik LLC
Advanced Robotics & Automation Engineering
www.bluetechnik.com
RE: Need a Permaneant Marking on Delrin
As a cheaper capital cost option, you could hot foil print. That's quite permanent with the correct foils.
Cheers
Harry
RE: Need a Permaneant Marking on Delrin
I drove by those laser guys almost every day on my commute to work. :)
Matt
CAD Engineer/ECN Analyst
Silicon Valley, CA
sw.fcsuper.com
Co-moderator of Solidworks Yahoo! Group
RE: Need a Permaneant Marking on Delrin
On one project, it was simple as molding a hole into the parts in question that only aligned upon proper assembly. Not only did it provide a visual clue as to how to put the parts together, but it was an excellent quality assurance feature. If you couldn't see through the hole in the assembly, you knew you'd put it together wrong.