Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Cryogenic Deflashing

Cryogenic Deflashing

Cryogenic Deflashing

I am having some parts cryogenically deflashed by a sub-contractor. Are there any issues to be aware of (cracking, reduction of seal 'life'). The parts are small o-rings for a snap on type fitting and should last 30 years+.

appreciate any input to add to my Google search!!


RE: Cryogenic Deflashing


Used to work for a seal manufacturer as a product engineer in charge of some old parts/tooling that required cryogenic deflash. I don't remember ever seeing a performance hit from the process nor product damage. Obviously you want the process to be as short and gentle as possible while getting rid of the flash. The only reason we avoided the process was to reduce cost and steps required to make a part.

I hope that helps.

RE: Cryogenic Deflashing


I have received parts back and have a mixed result - the trimming is generally good (once optimum process established). However some parts have got remnants of the flash that was removed stuck to the surface.

Is there a standard method to remove the post trim flash, the sub-contractor we used doesn't have a cleaning facility (just barrels and blasters).



RE: Cryogenic Deflashing


I am not aware of a standard method to remove the loose flash. My experience is that the parts were placed in a drum made of a perforate metal so that the flash and any media would drop through once tumbled. The materials were also highly filled and contained oils and waxes therefore as a consequence were not sticky. Bottom line, never had a problem with flash stuck to the parts. My only thoughts would be to make sure they are using a perforated container so that at temperature the flash would drop through the holes. I would also expect any natural sticky-ness of the parts to decrease at temperature so can the process go lower in temperature or maybe a little longer to give the flash time to exit.

Cyrogenic deflash is not typically a desireable process. A rotary trim process was preferable if you could not eliminate the flash at the molding tool at my previous employer. Fixing molds can be time consuming and expensive but depending on the number of parts that are being molded can be a cost effective solution.

Good luck.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close