spring materials

spring materials
	Post Reply		Forum

Posted by: huppmald ^®

09/01/2004, 08:21:23

Author Profile Mail author Edit

I'm looking for suggestions on a spring material, not steel or s/stl, to use in the medical field. My application consists of a needle piercing a rubber bladder to fill a bottle below. The needle stays within the rubber bladder during its application. But after removal of the needle, the bladder "dribbles" for 5 seconds or so. I'm looking at an insert of possibly two pieces into the .50 bore beyond the bladder that will spring load a secondary seal against the bladder that will be pushed away when the needle in inserted through the bladder. I need a backup spring or spring material that will be forgiving as the needle enters and will push back when the needle is removed.

Any suggestions are welcomed. Nothing is a bad idea.

Regards

Post Reply | Recommend | Alert

Rate

View All

| |

Replies to this message

spring materials

Re: spring materials -- huppmald Post Reply Top of thread Forum

Posted by: randykimball ^®
Barney
09/01/2004, 20:13:47

Author Profile Mail author Edit

I can't see the whole thing in my head, but I'd sure consider a polyurethane spring. We use them for several applications and they do well. A polyurethane spring is basicly a round cylinder of the material picked by size and durometer (softness/hardness) your design requires.
Contact your plastics supplier and see if you can get a few different hardness samples and sizes..... and play with it...
excuse me ... do some R&D.
-randy-

The worst suggestion of you lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

Post Reply | Recommend | Alert Rate Where am I? Original Top of thread

spring materials
Re: spring materials -- huppmald	Post Reply	Top of thread	Forum