silicon diaphragm

[Bader]

silicon diaphragm.JPG

Hello ..

Can any one suggest how is this diaphragm made? Is it compression molding or "Liquid Injection Molding"?
I was also wondering if this could be die-cut out of a silicon sheet? The diameter is 10mm and thickness, 2.0mm.

[M&M]

Hey Bader!

Couldn't say how the one in you pick was made but either compression or LIM could make it. If you have access to a LIM machine that would be a good way to go.

Ciao

[Bader]

I "think" it was made on LIM becasue of the very fine parting line in the middle and a little flash on the outside.
I am working on a 'non return valve' with low cracking pressure and need such gaskets. I heard LIM molds are very expensive and unless the volumes run in millions, they are not feasible.

I think these forums should have a 'medical device component section' to discuss such things. Greg...are you reading:-)

I am going to try to die-cut this out of a plain silicon sheet. lets see what happens.

Bader

[M&M]

LIM is $$$ and a step learning curve buddy and yes best for big projects. Compression is cheap and pretty easy to do.

Ciao

[Bader]

If i fail to 'die-cut' this profile from a silicon sheet, i am definitely going for the compression.
Some one, out there, must be making these ???

Bader

[greg]

Hey Bader,
Appreciate the forums suggestion, but can't create a specific forum unless there is so much demand in current forums as to make sense. Otherwise, you have too many semi-dead forums instead of fewer, but more active forums. Very much appreciate the thought though my friend, all the best!

[Louis]

Any luck Bader on this question?

[Bader]

Hi Louis..

i was having problems to log-in. thanks to Greg...he is always reacts "instantly" to any issues despite being a very busy man !

OK..about die-cutting the gasket from silicon sheet did not work. I had to get them made by 'compression' molding.
I learned that LIM was an expensive solution and best way was compression.

Did you attend the MDM East in Philadelphia? I was all set to attend by my visa got delayed

planning to attend MDM west in LA next Jan-Feb.


Bader