Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 2 of 2
  1. 1st December 2011, 09:31 AM #1
    djejmz
    djejmz is offline New Member
    Join Date
    Dec 2011
    Location
    Malta
    Posts
    1

    Default Help Bending 5m length of plywood

    Hey guys, new to this forum, and woodwork in general! I was hoping someone would be able to help me with something.

    I'm currently carrying out a dissertation on fabric formed concrete, and I need to build a formwork out of wood from which I will suspend a fabric and cast the concrete.

    http://www.umanitoba.ca/cast_buildin...rms_SCREEN.pdf

    If you do a search on that pdf for "FABRIC-FORMED RIGID MOLD FOR THIN-SHELL VAULTS" it should take you to a photo of exactly what I am going to try and build.

    My question is, what is the easiest way to "bend" the plywood into that curve, and to keep it from springing back into shape?

    Thanks

    James
    Reply With Quote Reply With Quote
  2. 1st December 2011 09:31 AM # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. 1st December 2011, 11:54 PM #2
    ian's Avatar
    ian
    ian is offline GOLD MEMBER
    Join Date
    Feb 2003
    Location
    back in Alberta for a while
    Age
    68
    Posts
    12,006

    Default

    Welcome James

    I've had a quick squiz of that PDF you linked to.
    Interesting stuff -- in my day the cutting edge was 2.5cm thick concrete origami

    First question -- does the mold for your disertation need to be 5m long?
    5m means 3 sheets of ply and the complications joining those sheets entails.
    Could you achieve the outcome using a mold 2.4m or less long?

    2nd question -- what shape are you trying to form?
    From the example you provide, curve springback is a minor issue. Having a frame strong and rigid enough to support the desired final shape is almost certainly the defining factor.
    Do you have a design for the shape?
    Have you (or can you) calculate the forces trying to pull the frame and moild cloth out of shape?
    regards from Alberta, Canada

    ian
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. Length of chisels in a set
    By pjr in forum HAND TOOLS - UNPOWERED
    Replies: 9
    Last Post: 29th November 2009, 02:04 AM
  2. Plywood vs Marine plywood
    By Jonnyiswalking in forum FURNITURE, JOINERY, CABINETMAKING - formerly BIG STUFF
    Replies: 9
    Last Post: 13th November 2009, 09:57 PM
  3. Plywood Sales split from Mr Plywood
    By Razgo in forum BOAT BUILDING / REPAIRING
    Replies: 14
    Last Post: 9th November 2009, 12:32 PM
  4. Plywood bending in Melbourne
    By Zatarra in forum WOODWORK - GENERAL
    Replies: 3
    Last Post: 27th July 2008, 02:55 PM
  5. Marine Plywood vs Baltic Birch Plywood
    By bateau in forum BOAT RESOURCES / PRODUCT SEARCH
    Replies: 7
    Last Post: 9th July 2008, 02:58 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules