×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Material Selection for Interior Trim Clips: Metal vs Plastic

Material Selection for Interior Trim Clips: Metal vs Plastic

Material Selection for Interior Trim Clips: Metal vs Plastic

(OP)
Hello everyone,

I am a new design engineer for automotive interiors. I was recently tasked with a cost reduction activity to find out what is the criteria for switching from a metal clip to a plastic clip. I understand that it depends on the oem requirements as well as the interior commodity as some areas where there is airbag deployment may prohibit the use of metal clips. However, I would like to know what is the general guidelines for material selection of clips. For example, let's say that the customer drawing specifies for a trim clip that is metal, but I can achieve the same functional properties with a plastic clip. What are the design guidelines or criteria that should be considered when deciding between metal or plastic? Ex: Stress/shearing analysis, assembly/interfacing of adjacent parts etc. I realize that this might be a vague question, however, I am just hoping to receive some direction on what I should consider. I really appreciate any advice, literature, or help that anyone can offer here. Thanks in advanced for your time and consideration!

RE: Material Selection for Interior Trim Clips: Metal vs Plastic

For a long time, it was metal clips from Tinnerman.
They could be a bitch to get out, they scratched the paint, and they scratched people.

Then it was 'christmas tree clips', which pushed in easy, didn't scratch the paint, and were cheap.
But they were a bitch to get out, and often caused catalyzed injury to technicians, even with special tools, and they were a one-time use thing, so technicans had to stock replacements.

Now it seems to be beautiful, sturdy, integrally molded liftoff clip/hooks. Buzz out a couple of screws, give it a bump here and there, and the door panel just lifts right off without damage or injury, and goes back in reverse order with no new material except a little extra weatherstrip cement on the rain shield.


Someone has been paying attention to repair costs.

Mike Halloran
Pembroke Pines, FL, USA

RE: Material Selection for Interior Trim Clips: Metal vs Plastic

(OP)
Mike thanks for that information! That's some history I wasn't aware of. I still see the Christmas tree clips in-use for some of the current models (Some are metal, some are plastic), either way they can definitely be troublesome to remove. And you are absolutely correct, Serviceability can be a little pricey when you break a couple of clips and have to replace a whole door panel. I do wonder sometimes if that is conveniently the design intent; Or inconveniently depending on how you look at it, or who's making the ($) I guess.

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!


Resources


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