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Old 04-13-2019, 03:12 PM
pkcamaster2 pkcamaster2 is offline
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Default Hot wire tool?

I just saw this video and was thinking it could be a handy way to cut foam for packaging (until a product has enough volume to justify purchasing large quantities from a packaging company.)

Suggestions?

https://youtu.be/u8SIozdhh_o

I've considered buy one of those foam spray gun setups (2-3 years ago) but they take up gobs of room and the equipment was pretty expensive (almost $15k for the equipment & 2-3 55 gallon drums of foam-making material) if I remember correctly. Still might be a better path than wasting CNC cutting time on foam.
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Old 04-14-2019, 09:54 AM
Charlie_L Charlie_L is offline
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Most important is to have good ventilation. The out gassing in the typical foam is toxic.
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Old 04-14-2019, 04:12 PM
The real JP The real JP is offline
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I don't even want to cut foam, but I watched that whole video...
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Old 04-14-2019, 04:37 PM
drummerjg drummerjg is offline
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Quote:
Originally Posted by The real JP View Post
I don't even want to cut foam, but I watched that whole video...
It was addicting, right?
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Old 04-14-2019, 05:26 PM
rcrawford rcrawford is offline
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Definitely less messy than cutting the foam with a spindle tool!

Would take a special CAM program and a C axis for the hot wire cutter.
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Old 04-14-2019, 07:46 PM
Charlie_L Charlie_L is offline
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I just used a simple hot wire to cut some foam a couple weeks ago. They were simple spacers between some mdf ply for signs. In my case I used the simple "wire" and variac that I used to cut the foam when I built my plane. I cut the foam on the CNC just 1/2 inch too big. Then used the ply as a template for the hot wire to follow. In my case the wire is just strung between two pipes suspended by a 2by4 to keep it tight. I didn't take any pictures during or after. Anyway, the customer liked the hot wire idea because it left a cleaner cut than the CNC did.

The video process is MUCH cooler. Just need another stepper motor in place of the spindle I guess. And some magic software to make the toolpaths work.
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