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SpriteSpot.com • View topic - Cutting new foam

Cutting new foam

Need advice on installation, materials, originality? Check in here.

Cutting new foam

Postby dan » Mon Sep 06, 2004 9:57 am

A general question...

Was looking at SpridgetBoy's photos of his rear seat, and it has a fairly complex piece of foam supporting the seat.

I'm wondering if there's a good way to cut or shape a piece of foam? I've always just taken a razor blade, but the result just aren't that good.

Is there another way to do it? Maybe a hot wire of some kind or??

Thanks!
d
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cutting foam

Postby Gearhead » Mon Sep 06, 2004 10:32 am

Have seen several upholstery folks use everything from electric knives to special razor knives bent in different shapes, to electric sanders you imagination is your guide. Gearhead
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Postby Frogarri » Mon Sep 06, 2004 10:33 am

Yes to do a 'neat' job a hot wire cutter is the best. However, an electric cutting/carving knife will do a good job. But you are limited to the lenght of the blade(s). It will give a better job that razor blades on smaller jobs and can be used to round corners and edges.
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Postby dan » Mon Sep 06, 2004 11:16 am

So...hot wire cutters...

Can you make one? (My preference, given the frequency of use) or possibly buy a cheap one, or??

Thanks!
d
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Cutting Foam

Postby Frogarri » Mon Sep 06, 2004 9:14 pm

Yes, you can make a foam cutter. All you need is some wire (stainless steel, guitar string, nichrome wire), a power source (battery charger, gun type soldering iron) and some misc. hardware. Here is a link to one plan, an internet search will uncover others either homemade or store bought.

http://www.davidwoodward.com/iceflyer/hotwire.htm

One thing the author dosen't mention is that a battery charger putting out more than 2 amps will need to be throtled to keep it from burning the wire. A dimmer switch wired to the hot side of the battery charger output can be used to lower the output. This will be a trail and error setting. To make real clean straight cuts use a template or guide rails to guide the wire through the foam.
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Postby JP Furble » Tue Sep 07, 2004 2:17 pm

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Postby Bill Masquelier » Sun Sep 12, 2004 10:19 pm

Totally different topic-- Dashboards. I have a MkIV (69) with a totaled dash, I have seen those PVC (?) covers for MGB's that recover the entire thing. Does anyone make one for the Spridget? Bill
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Postby spritenut » Tue Sep 14, 2004 11:31 pm

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Postby bugeye58 » Wed Sep 15, 2004 12:11 am

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Postby rulle7 » Tue May 23, 2006 11:10 pm

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Cutting Foam

Postby Jim Gruber » Wed May 24, 2006 10:39 am

AN IMPORTANT HEALTH HAZARD- Cutting foam as a byproduct produces as I recall PHOSGENE GAS. Yeah the same stuff used in WWI. Not sure which type of foam produces this type of gas and it may be just the white / blue building insulation foam that produces PHOSGENE when cut with a hot knife but caution is in order. Don't try to use a hot knife in a closed garage without lots of ventilation.
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