Where can I find mold sweep materials?

[jnewmanco1]

I have a very simple mold making small, flat, thin disks and they get vacuum stuck to the end of the ejector pins and will not fall during ejection. I have tried all sorts of weird ejection profiles, an air knife, etc., and still cannot get them to fall off consistently.

I want to put a mold sweep on the end of our sprue picker and just sweep them off the end of the pins with a downward stroke. Can anyone tell me a good source of materials for this sort of sweep? I was thinking some sort of semi-stiff bristled brush but need something at least 8" wide. Or maybe some other type of material, rubber or plastic blade perhaps might work just as well. Any ideas? Thanks. James

[brentb]

Try McMaster-Carr. If they don't have it (industrial wise) you don't need it!

Happy Sweeping!

KOM

brent

[Suhas]

You can also talk to a silicone molder since they use some of theses.
Suhas

[moldingppm]

If McMaster doesn't have anything, would it be an issue to have your tool shop grind the tip of the ejector pins to a point? not a huge one, just enough for it to not have any suction that keeps it on the pins.