Curving card for a curved corner of a building.

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The Sligo Rover
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Curving card for a curved corner of a building.

#1

Post by The Sligo Rover » Fri May 22, 2020 2:31 pm

Help please, has anybody any suggestions for how to curve card for a curved corner on a scratch built building please?
My requirement is for about a quarter circle something approximately the diameter of a yoghurt carton.
Any ideas on how I may be able to do it please?

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Walkingthedog
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Re: Curving card for a curved corner of a building.

#2

Post by Walkingthedog » Fri May 22, 2020 2:38 pm

Just curve it over what ever curve you require. Cardboard is easy to curve as long as it isn’t corrugated. Cut some card formers to glue inside the curve if necessary.

If you take some card and bring the two edges together it will form a curve unless you purposely crease it.
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Tricky Dicky
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Re: Curving card for a curved corner of a building.

#3

Post by Tricky Dicky » Fri May 22, 2020 3:45 pm

If you have something like a rolling pin, use that as a mandrel and gently bend the card sliding it across the mandrel forwards and backwards so as to apply the pressure at different points. Once you have a smooth curve even if not the correct curve, then as WTD has said use curved formers glued inside to keep the curve you require.

Then as quickly as you can replace the rolling pin before domestic management sees you with it. Other things that might serve as a mandrel of about the same size would be a piece of drainpipe. The thing is not to get a crease in the card.

Richard

The Sligo Rover
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Re: Curving card for a curved corner of a building.

#4

Post by The Sligo Rover » Fri May 22, 2020 7:02 pm

Thank you for those suggestions, thinking about it, a baked bean or soup can will not be far off what I need.

Forfarian
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Re: Curving card for a curved corner of a building.

#5

Post by Forfarian » Sat May 23, 2020 6:40 am

Why not use an alternative method, cut a section out of a card tube, section of plastic pipe or even a section of a bean can. You are scratch building so think outside of the box. Go Blue Peter and cut a toilet roll tube and open it out.
Just a few suggestions,
Plastic pipe can be manipulated when heated with hot water, Even a cheap plastic container could be cut up.
Forfarian aka Tim
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Mountain Goat
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Re: Curving card for a curved corner of a building.

#6

Post by Mountain Goat » Sat May 23, 2020 11:25 am

I am intregued! :lol:
Enjoying freelance modelling in 7mm narrow gauge Feel free to ask questions relating to the Mountain Goats Waggon & Carriage Works thread.

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IanS
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Re: Curving card for a curved corner of a building.

#7

Post by IanS » Sat May 23, 2020 12:39 pm

As yoghurt cartons come in a variety of size (and shapes) why not use one of the appropriate shape?
(Eat the contents first though!)

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RAF96
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Re: Curving card for a curved corner of a building.

#8

Post by RAF96 » Sat May 23, 2020 3:59 pm

I employ the rolling pin method using a suitably sized mandrel. You can achieve the same effect by drawing the card over a rounded edge, say a table top or other bit of furniture. The technical method is to put it back and forth through a mangle - two adjustable rollers. Unfortunately not too many of those around these days, but you could make a model sized one from broom handle or dowel offcuts, a simple frame with a slotted adjuster for one roller and some screws and washers.

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Walkingthedog
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Re: Curving card for a curved corner of a building.

#9

Post by Walkingthedog » Sat May 23, 2020 4:43 pm

Curving cardboard is what it does naturally. If you put a piece of cardboard in to a gap and it is longer than the gap it will curve so it fits. Does it on its own.
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