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Finished CNC build for Composite Molds!

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Finished CNC build for Composite Molds!

Old 04-18-2010, 10:19 AM
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sunnybreeze-inactive
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Default Finished CNC build for Composite Molds!

After tons of research time and then a tough build I have completed my very robust 3 axis CNC machine for making composite molds. This will by-pass the plug building process and the mold will be perfect. Stay tuned for the first mold coming up soon. The unit is good to .001" all day long and fast with quick feed rates. I will be taking orders for mold making later this summer. Right now I'm coming up to speed on 3D cad skills which is required for the start of the project. I'm quite proud of this build as I designed and build of 4' aluminum and linear slides off Ebay. The Ballscrews are sweet and it was a fun build. Running mach 3 software for the machine and it's fairly simple. Check it out:
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Old 04-18-2010, 10:34 AM
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Slow Low
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Default RE: Finished CNC build for Composite Molds!

Now there's an investment worth the time and money! GREAT STUFF!! What's the first project gonna be? ie - how big's the table and what kind of travels have you got there?
Old 04-18-2010, 11:07 AM
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Bundubasher
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Default RE: Finished CNC build for Composite Molds!

Very nice piece of kit you've made........ I envy you...Enjoy it.
Old 04-18-2010, 03:26 PM
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Default RE: Finished CNC build for Composite Molds!

looks very nice, great job.
Old 04-19-2010, 12:31 PM
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Default RE: Finished CNC build for Composite Molds!

Good looking machine!
I have been running my smaller router since january. It takes the hobby to new dimentions.
Additional to a dust extraction system I think you would want some shielding for the screws and linear guides.
Static make foam and wood dust stick like crazy to the machine.

regards

Lars
Old 04-19-2010, 05:54 PM
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Default RE: Finished CNC build for Composite Molds!

I agree a dust collection system is next on the list. My cutting diminsions are 26" wude by 56" long. My Z axis is 4". My first project will be the club FROG electric park flyer which we are using for combat. Should be a good starter project.
Old 04-19-2010, 09:44 PM
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Default RE: Finished CNC build for Composite Molds!

sounds like a perfect machine for Quickie wings and fuses
Old 04-20-2010, 02:49 PM
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Default RE: Finished CNC build for Composite Molds!

What material are you using for molds? Will that thing handle aluminum? Can you use Inventor (.IAM) files?
Old 04-24-2010, 06:34 AM
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Default RE: Finished CNC build for Composite Molds!

yes it will run Aluminum. I plan to use maple for my molds most of the time due to cost. I'm still working out the details as I'm new to CNC.
Old 04-26-2010, 11:09 AM
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Default RE: Finished CNC build for Composite Molds!

You may want to look into materials like this: http://www.trelleborg.com/en/Advance...g-Block-TB650/
Old 04-27-2010, 04:30 PM
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Default RE: Finished CNC build for Composite Molds!

I'm having a 1/5 scale J2M3 Raiden designed in CAD. PM me with what it would cost to make a plug for the fuselage. Thank you. I can have the files sent to you after they are done. Maybe we could start with the cowl plug.
Tim
Old 04-27-2010, 06:02 PM
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Default RE: Finished CNC build for Composite Molds!

Nice Machine. Just signing up.
Old 05-02-2010, 07:42 PM
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Default RE: Finished CNC build for Composite Molds!

Awesome!!
Old 05-25-2010, 12:05 PM
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Default RE: Finished CNC build for Composite Molds!

As someone who has been considering machining some female molds on our CNC machines at work I wish you sucess. A few points you need to consider. The surface finish of any 3D contour is largely a function of the cut step over and cutter geometry in addition to the relative positional accuracy of the machine. The smaller the increment, the shallower the scallops with less hand finishing to do which is more troublesome in a female cavity. The down side is much larger programs with longer run times. Memory could be an issue. Using the biggest possible corner radius on the cutter will also tend to minimize the cusp height. The tradeoff there is lack of detail possible to cut and inside corners. In my experience, I would be careful in cutting aluminum with your machine. Any play in the ways and slide deflection will result in chatter issues. Be sure to use a lubricant on the cutter or the chips will weld into the flutes and break your cutter.

I look forward to seeing your progress.
Old 05-25-2010, 06:36 PM
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Default RE: Finished CNC build for Composite Molds!

Skipm is right about trying to machine Aluminum on your small cnc router. Not a good idea IMHO. I have $65,000.00 cnc mills that spray mucho lubricant on the cutter head to keep them from jamming and breaking. I also have a small CNC ROUTER just like what you have built. You look like you did a very nice job. I use mine for cutting ribs and former etc. and it is very nice for that, add a vacuum attachment to your cutter head, you're gonna need it. You may want to install limit switches if you haven't already done so, to the travel... to keep it from crashing. I have done a few very small Aluminun parts like servo arms, but I added a mister attachment to lubricate the part. I have a different bed that is all aluminun so the mister does't ruin anything when it gets wet. I had to put a pan under the machine to contain the lubricant.
I think these homemade cnc routers are not suited very well for metals. Good luck and start out with slow feed rates and shallow cuts.
Old 05-25-2010, 06:47 PM
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Default RE: Finished CNC build for Composite Molds!

You might consider making a male plug from a block of HDPE nylon. I suspect that tool marks could be removed and details like panel lines added by hand operations. Epoxy surface coat would not adhere. Thoughts?
Old 06-07-2010, 12:58 AM
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Jeff Wohlt
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Default RE: Finished CNC build for Composite Molds!

Wow...sweet. I would like some wood done for doing vac molding for boat hulls. Thee will be a top and bottom but pretty easy.
Old 06-08-2010, 03:16 PM
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Default RE: Finished CNC build for Composite Molds!

oh how sweet it is!
Old 09-19-2010, 08:16 PM
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Default RE: Finished CNC build for Composite Molds!

I hope not to offend, but may I ask how much you have invested both in time and money on that? I am curious if it is a project I could afford to play with.

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