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Subject: Re: Machining and finishing acrylic material

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Message Thread:

Machining and finishing acrylic material

1/31/19       
Derrek

I possibly have a project involving 3/8” acrylic doors. I have done this before but bought them from another company. We his project is pretty big and I am having trouble with the cost of buying them. I have a cnc and have talk d to Vortex about tooling. I have looked into finishing edges and most sources are cutting on a saw then doing a final trim with a router to smooth out then flame polishing with a torch. For those of you that have cut acrylic on a router, is the edge finish good enough off the cnc to go right to flame or does it still need a final trim before Yu can flame it

2/1/19       #2: Machining and finishing acrylic mat ...
Jerry Member

If you want to cut out the flame polishing you may want to check out the Onsrud 75-100 series of bits.
http://curvetube.com/75-130_3_8_PCD_Single_Flute_Polishing_Tool_For_Acrylics_Video
_by_LMT_Onsrud/5JOUnH2I8MY.video

2/1/19       #3: Machining and finishing acrylic mat ...
Snaglpuss

We use slow spiral "O" flute upspiral bits on acrylic.
Some examples in 1/2" Dia.-
Onsrud 52-650 or Southeast SOU742
In 1/4" Dia.-
Onsrud 52-624 or Southeast SOU-723
You might need to cut through in two down pecks esp. if using the 1/4" diameter bits on 3/8" thick acrylic.
In any case, after cutting through take a .015 clean up pass on the edge.
Also an arc in / arc out on the tool path won't hurt either.
We don't flame polish, we would finish them by sanding and buffing. this isn't a big deal or money investment if only doing a few. With a decent edge doesn't take too long.
If you have a choice cast acrylic cuts nicer than extruded but might be a little more money.

2/1/19       #4: Machining and finishing acrylic mat ...
Snaglpuss

I just looked up the price of the Onsrud PCD bit- $1500! Wow.

If you want to try flaming the edges better do some practicing on scrap. It's easy to screw up if you've never done it before.
Keep a fire extinguisher handy in case you light one up and can't wack out the flame.

2/2/19       #5: Machining and finishing acrylic mat ...
cabinetmaker

Definitely O flute. Slow the chip load down. Get a good edge. Sand lightly. Then flame

We flame 3form and lumicore all the time

10/10/21       #6: Machining and finishing acrylic mat ...
FORSUN CNC Member

Website: https://forsuncnc.com/

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