Veneering to a Bending Ply Substrate

      Advice on adhesive choice, layup methods, and clamping techniques for a large curved veneer assembly. September 29, 2014

Question (WOODWEB Member) :
I am using a product called Kerfkore for the first time on a large island with a 9' radius that is 18' long. I thought I would give it a try as to reduce the labor on a glue up. It is a fiberboard core with a hardboard face for your lamination. I am going to use a maple veneer but have never veneered anything this large and I don't have a spray rig but I'm sure rollers will do fine as that is what I usually use for glue-ups. What would be the best approach for this? I have read in the Knowledge Base on adhesives but they always turn into a battle on the chemistry. Any help would be great. The arc length on this island is about 21' and 42" tall. It seems that contact is not the way to go, so maybe the white glue or a two part? Not real sure, it is a big piece.

Forum Responses
(Adhesive Forum)
From contributor C:
I think we need more information. How do you plan to go about this (for example, are you planning to vacuum bag the veneer to the Kerfcore, then somehow secure Kerfcore to a frame)? Adhesives and method are interrelated.



From the original questioner:
I was planning on building the frame in one piece, attaching the kerfkore, and then applying the veneer to the whole so I could skip seams. It sounds like it would be better to veneer first and cover the seams with some panels. I have no vacuum system. I could clamp it using slats all along the length vertically to cover the height but I don't think there would be enough pressure in the middle to get a good mount. I did read about using white glue on both surfaces letting it dry and using an iron to get the bond.


Click here for higher quality, full size image


Click here for higher quality, full size image



From contributor C:
I think your biggest challenge here is how to get the Kerfcore veneered, not which adhesive to use. You're probably aware that there are many advocates of contact cement - I'm not going to go there, you can pursue the Knowledge Base at the Veneering Forum, suffice it to say I'm not a believer. Glue plus iron equals even less likely to work, particularly on such a large piece. Clamps and cauls - not on panels this big. You need to find someone in your area with a vacuum bag, pneumatic or hydraulic veneer press (someone who can press veneer) to veneer the Kerfcore. Or can you buy it with the face you want already on it. That would be ideal.

From Contributor Y
Member

Obviously when doing this type of glue-up it's important to have your method thought out and everything laid out in advance so that it goes smooth no matter which type of product you end up using. The adhesive that you use will dictate the open time and you should consider that when selecting your method. I've seen shops use everything from vacuum presses to band clamps to clamps and cauls for this type of project. I do think a good vacuum system would be the best if available for this type of project since it applies uniform pressure throughout. If you go with slats or cauls like you mentioned, if they are bow shaped or have some sort of spacer in the center that is higher than the outside edge, it improves clamping pressures in the center. Adhesive application is also important on larger pieces to give you the working time you need with little mess to clean up. The pressurized systems with roller, spray or other quick spreading ability is the best for this type of application. Hand hoppers with rollers also work well.



Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?


Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Adhesives, Gluing and Laminating

  • KnowledgeBase: Adhesives, Gluing and Laminating: Glues and Bonding Agents

  • KnowledgeBase: Adhesives, Gluing and Laminating: Gluing and Clamping Equipment

  • KnowledgeBase: Veneer

  • KnowledgeBase: Veneer: Techniques


    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.



    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2016 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB











  • WOODWEB - the leading resource for professional woodworkers


      Home » Knowledge Base » Knowledge Base Article