×
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!

*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

Bi-stable Tape/Ribbon Spring

Bi-stable Tape/Ribbon Spring

Bi-stable Tape/Ribbon Spring

(OP)
I am looking for some design info and manufacturer of a bi-stable tape/ribbon spring like the 'slap bracelet' kid's toy.  I have found a few research papers online, some of which I'll need to purchase to see the whole thing.  But I've not located a manufacturer yet.

Appreciate the assistance,
-tg

RE: Bi-stable Tape/Ribbon Spring

Please give more information what you are after. For example:
1. What is the desired force to snap to the second stable position and the force back.
2. What will be the travel from one stable position to the second?
3. How many snaps the spring has to survive?
4. What are the size limitations for the spring?
5. Does it have to be a ribbon shape?
6. Environment?
7. Etc.

If you can attach a picture or drawing it will help because I do not understabd what is: a 'slap bracelet' kid's toy.

RE: Bi-stable Tape/Ribbon Spring

(OP)
http://en.wikipedia.org/wiki/Slap_bracelet

1. I am working on the requirements for the design, but was looking for some data on what forces are possible from this type of spring.  
2. The spring will coil upon itself.
3. 1000
4. Upto 1" wide
5. The shape is similar to a parenthesis ")"
6. It will be encapsulated by a protective coating.  Will need some corrosion protection in raw state.  Will see outdoor temperatures and weather conditions.  Non-magnetic may be desirable.

Thanks,
-tg

RE: Bi-stable Tape/Ribbon Spring

(OP)
Just to clarify #1 above, I know the coiling force on these springs is low.  I am looking for some data telling me what those forces are so I can choose the encapsulating material and can design the profile/geometry of the coating accordingly.  I believe this spring force will drive the design rather than be driven by it.
-tg

Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies before flagging posts.  Per line item #4, some cross posting is appropriate when done correctly.

RE: Bi-stable Tape/Ribbon Spring

Try contacting Maryland / Rolex spring @ 410-391-7400.  If memory serves me correctly, when I last visited them in 2007 they had a product similar to what you are speaking of.  They should be able to point you in the right direction.

RE: Bi-stable Tape/Ribbon Spring

(OP)
Thanks for the lead. smile

-tg

Please see FAQ731-376: Eng-Tips.com Forum Policies before flagging posts.  Per line item #4, some cross posting is appropriate when done correctly.

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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