CNC Machining and Finishing Epoxy Tooling Board to Produce and Accurate Composites Pattern


CNC Machining and Finishing Epoxy Tooling Board to Produce and Accurate Composites Pattern
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Matt (Staff)
Matt (Staff)
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Hi Everyone,

Hopefully a few of you have noticed that we've been publishing a number of new video tutorials recently. I've now published the first two (out of three) of a new series which shows the end-to-end process for starting from a CAD design, CNC machining the pattern from epoxy block then sealing and preparing the pattern before taking a prepreg carbon fibre mould off the pattern. In the next video (not done yet) we'll finish off by using the prepreg mould to produce a carbon fibre part.

Essentially, in this series what we're trying to demonstrate is the 'other way' to make composite parts, using technology and high tech materials to replace the more manual traditional methods. This is a topic that comes up every time during our training courses and so hopefully this is a process (and tutorial series) that people will find interesting (and maybe useful). The price of perfectly usable CNC equipment is coming down all the time and the quality and availability of 3D CAD systems (like Fusion360) is moving the baseline of what is achievable at home or in a small workshop or business. Our new products and tutorials aim to support this revolution. Also, in this current climate where people are very focused on the idea that 3D printers are the answer to everything, hopefully we can steer a few people towards the understanding that for most composites processes a CNC router is a far more suitable piece of kit to invest in.

So, this first tutorial in the series we demonstrate how to CNC machine epoxy tooling board and then seal and finish it using epoxy board sealer.


I'd be very happy to discuss any of the topics raised in the videos including how these processes and materials might be used in your projects.

Matt Statham
Easy Composites / Carbon Mods - Technical Sales
Edited 7 Years Ago by Matt (Staff)
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cumberdale
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I have a question about cleaning the epoxy mould after sanding it with 800 grit paper. It says in the video: "After sanding all of the dust should be carefully removed using a dry cloth". And then a Microfibre Polishing Cloth as well as a Lint Free Solvent Application Wipe are shown.
Just to make sure: cleaning the freshly sanded epoxy mould with Easy-Lease Mould Cleaner is not necessary?

Also I found that after sanding the epoxy mould with 800 grit paper it can be useful to carefully remove dust from corners with a toothbrush. Depending on the geometry of the mould reaching these corners can be hard when using a cloth.
Matt (Staff)
Matt (Staff)
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cumberdale - 2/8/2018 11:04:53 AM
I have a question about cleaning the epoxy mould after sanding it with 800 grit paper. It says in the video: "After sanding all of the dust should be carefully removed using a dry cloth". And then a Microfibre Polishing Cloth as well as a Lint Free Solvent Application Wipe are shown.
Just to make sure: cleaning the freshly sanded epoxy mould with Easy-Lease Mould Cleaner is not necessary?

Also I found that after sanding the epoxy mould with 800 grit paper it can be useful to carefully remove dust from corners with a toothbrush. Depending on the geometry of the mould reaching these corners can be hard when using a cloth.

Hi,
That's right, mould cleaner would not be necessary. If you've flatted the surface using 800 grit then it should be a clean, virgin surface where you only need to remove dust. If you are in any doubt about whether grease or other contamination could be present (grease off your hands for example) then mould cleaner would be a good idea but in most cases this wouldn't be necessary. Your suggestion of a toothbrush to get into the corners is a good one and another option might be a high pressure air blast (from a compressor) but make sure that the air line does not have an inline oiler; this would certainly defeat the objective!


Matt Statham
Easy Composites / Carbon Mods - Technical Sales
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