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Darryl Keil

Last Activity 2025-09-09 11:09 AM
2 replies, 1293 viewings

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Heath

Posts: 2

Joined: 2013-07-16
Location: Toowoomba

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Subject : curved former problem
Posted : 2013-07-16 11:56 PM
Post #36939

I used to make some curved stools and side tables and made the formers from solid blocks of mdf (made of template routed ribs). I'm doing a bench and made this one from ribs of mdf with spacers (16mm) and pressed a skin on. Of course I now have a wavy surface! I did at at too high a vacuum I suppose, If I press on another 3mm mdf skin (radius isn't signifigant here) at about 12hg will this even things out or is there anythings else I could do?

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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: curved former problem
Posted : 2013-07-19 7:29 AM
Post #36943 - In reply to #36939

Having some trouble understanding the design of the two different formers. Was the first solid or made of individual struts or ribs, and if the latter what was the thickness of the ribs, the distance between, and was there a continuous "skin" over the ribs, and what was the material and thickness of the skin. The same questions for the second former that did not work.

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Heath

Posts: 2

Joined: 2013-07-16
Location: Toowoomba

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Subject : RE: curved former problem
Posted : 2013-07-20 1:21 AM
Post #36944 - In reply to #36943

Thanks for the reply, the solid block formers were (for one) cnc cut 16mm mdf with 2mm hoop pine ply skins with formica over that.

The big bench mold is 16mm mdf ribs, 16mm spacers with a 3mm mdf skin, thats what rippled...I was in a rush so screwed on a 3mm melamine coated mdf sheet over that and pressed a shell, no problems with a cross linking pva, very minor springback.

I put a straight edge on the rippled surface and the light gaps were so minimal I left it as is.

Has anyone seen the curvomatic device on youtube? $700.00 per metre squared! Loving the vacuum, nature doesn't abhor it, thats for sure

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