Removing bellmouth condition

[mtparker18]

Hey guys,

I'm an injection molder in SW PA.
I currently have a few molds that are starting to form a bellmouth condition around the ejector pins.

I was wondering what I'd need to do to fix this.

Let's say I use a pin that is .1550, which is the one forming the bellmouth.

Now, if I get a pin that is .0005 oversize, do I get a reamer that is .1555? or what size bigger does the hole need to be than the pin?


thanks.

Mitchell Parker

[mtparker18]

Bump,

Any answers anyone?

[fpd56]

Mitchell,
Standard oversize ejector pins and reamers are available from DME
Normal oversize pins are +0.005"
If your current size is 5/32 (0.156) you can get 0.161 pin.
Its all depends on how big is your bellmouth.
PM me if you have any concerns