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CNC-machining precious plastic

This topic contains 5 replies, has 3 voices, and was last updated by  Siemen Cuypers 3 years ago.

Siemen Cuypers siemenc

CNC-machining precious plastic

03/08/2017 at 22:05

I’ve been doing some quick testing on cnc-machining plastic created with the extrusion machine made by using the technique which has been discussed in this topic. I thought I’d share my results here and post later tests and experiments here as well.

The type I did the first tests on was PP (5) and gives nice and promising results! Machining goes very smooth using a single flute upcut, 18000 rpm and a feedrate of 25 mm/s. The only downside is that I now sometimes get some white burrs from the plastic. But quickly going over it with a heat gun gets rid of those.

More tests coming soon.

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03/08/2017 at 22:15

More pictures.

05/08/2017 at 21:56

Hey @siemenc ! Looking amazing! What is the object exactly? A soap holder? Were you able to reuse the “waste” plastic of your object?
Looking forward to seeing more!


06/08/2017 at 11:51

Hi flo-2,

That was just a random 3D-surface I quickly drew out to see what kind of surface finish I could get in the first place. I did keep the shavings! But since I haven’t build the machines myself yet I haven’t tried remelting it. 🙂

08/08/2017 at 10:43

To not waste time at keeping shavings, I saw my friend use a vaccum plugged on the cnc milling machine when is running 😉
A clean bag is better before start with a different material in order to separate materials.
Keep going,
Looking forward to hear news

08/08/2017 at 17:54

Yes, we do that as well with cutting wood, it’s the thing you can see behind the cutting head. But I didn’t want to run it through the extraction system as it would end up being mixed with wood dust & fibers. 🙂

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