CNC Molds and Cores for DLG's - RC Groups
Thread Tools
Feb 13, 2013, 04:19 PM
Registered User
Merk's Avatar

CNC Molds and Cores for DLG's

I have had my CNC for about 1 yr now and just now getting the time to do some real work on it.

So I have cut some Corian Molds for a DLG. They turned out great. Now I have been trying to cut the cores. Just about got it. on the first attempt.
But I ran into a problem I have a vacuum table to hold the core down so I could cut the second side.

Sign up now
to remove ads between posts
Feb 13, 2013, 07:15 PM
Registered User
An air leak is an easy way to "turn it down".
Feb 13, 2013, 07:34 PM
Registered User
Merk's Avatar
Thanks I will have work on that.

Feb 13, 2013, 08:48 PM
Registered User
A sliding or pivoting gate over a hole works good. Or a valve on the hose open to the air.
Feb 13, 2013, 09:06 PM
dougmontgomery's Avatar
have also seen where someone uses a rubber 1/16th flap on the inside of the bucket, then the flap just opens what it needs to before caving in the bucket similar to a diaphragm.

Feb 13, 2013, 09:08 PM
dougmontgomery's Avatar
is your other vacuum hold down for the initial block of foam just a flat rectangle on the inside?

Nice work,
Feb 14, 2013, 11:32 AM
Registered User
Merk's Avatar

Yes. the holdown is just a flat rectangle.

Do you think I should make a new Vacuum table with a bull nose bit?

Feb 14, 2013, 02:31 PM
dougmontgomery's Avatar
More info on your vacuum table with bullbose bit?
Apr 30, 2013, 04:31 AM
Registered User
What are your speeds and feeds to cut Corian? Is the material too abrasive on the cutters? I have a home made MDF CNC router and I am not sure if it can handle tough materials. I am making molds in basswood covered with resin wood finish and although is not a mirror finish it looks fine to me.
May 01, 2013, 07:57 AM
Registered User
Merk's Avatar
Corian is very easy to cut. Use a carbide bit and it will cut very nicely. I have been turned on to these bits. and they work great.(I use the 60 deg radius bits.)

As of feed rates and RPM’s I would have to look at my program. (Mach3)

I just look at the chips and listen to the chatter of the bit and adjust from there.
But I really like these bits they work well.

I have cut some more molds I will have to post some pics soon.

May 01, 2013, 08:48 AM
Father of Fr3aK, DLG Pilot
tom43004's Avatar
Totally depends on the machine, the bit, and what you're trying to do.

Last night I cut some finish passes with 1/4 ball mill in a Joe's 4x4 with a 3 1/4hp Hitachi router at 10000 rpm and 60ipm. That seems to be a good finish speed for my machine in Corian.

Roughing is typically 1/2 ballmill or 1/4 ballmill with deeper cuts, larger steps, and around 40ipm. My machine is limited by the lack of cutting power in my router, not by the machine's mechanics.

Looking forward to the pictures Russ. I just did another fuse mold / canopy mold and after four years I feel like I'm starting to get pretty good at this stuff. Scary how much I still don't know though.
May 02, 2013, 10:10 PM
Registered User
I understand... I use an edge trimmer at 27000 rpm and 1/4" end mill for roughing. I think I get good results for the set up I have. As I said, its a MDF machine with Nema 23 steppers. Nothing fancy but it does the job. Attached, a picture of the CNC machine and the mold for a BD I cut in basswood.
Last edited by eghelman; May 03, 2013 at 04:21 AM.
May 03, 2013, 06:00 AM
Registered User
dpot's Avatar
nice work eghelman
May 03, 2013, 08:58 AM
Registered User
Merk's Avatar
That is some nice work.
I built a Joe's CNC and I have a cutting surface of 47"x57"

May 28, 2013, 02:13 AM
Closed Account
I have a cnc router 8x16'

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale Mini DLG fuse and CNC'ed wing cores Wave Glider Aircraft - Sailplanes (FS/W) 2 Feb 15, 2013 09:59 AM
Sold Zone V2 Four Panel CNC Cores for DLG heliwill10 Aircraft - Sailplanes (FS/W) 2 Sep 06, 2012 02:49 AM
For Sale CNC DLG foam cut wing cores for sale, with Drela Airfoils RobertTHaas Aircraft - Sailplanes (FS/W) 9 Dec 30, 2008 12:48 PM
Discussion CNC Foam Cores for My DLG yanivlevi Hand Launch 2 Mar 28, 2008 08:19 AM
Update for NEW CNC molded DLG RobertTHaas Hand Launch 50 Feb 09, 2005 09:42 AM