Mould from CNC Milled MDF

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Mould from CNC Milled MDF

Author	Message
ABurnard	ABurnard posted 8 Years Ago HOT Topic Details
Group: Forum Members Posts: 1, Visits: 12	Hello All, I have access to a CNC mill with which I intend to mill out moulds using MDF. I am aware of the issues regarding MDF swell and I'm looking into figuring out how to seal it and I have a few options. 1. Using a sanding sealer/shellac to seal the milled edges and then polish until as smooth as possible 2. Use Epoxy resin to infuse the milled edges and then polish until as smooth as possible once hardened The third I am unsure about as to whether it will work 3. Using Epoxy tooling Gelcoat to seal the milled edges create the mould surface I'm looking to make as precise a mould as possible without resorting to metals or plastics for mould creation(as the Mill i have access to is not super great as it is a DIY build) I'm very new to all of this sort of stuff and would appreciate any comments or suggestions as to how to proceed with MDF if at all. Thanks
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Tony2125	Tony2125 posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 12, Visits: 59	Hello There a some material specifically design to build molds without going to aluminum or steel I am not sure whether you can start from MDF or not I think it also depend to the technique you will use , infusion or preg , if the mold needs to resist to temperature And also the size of your finish part See this link for epoxy board http://www.talkcomposites.com/23543/Using-epoxy-tooling-board-to-make-CNC-machined-patterns-and-moulds
	Reply Like 4
Joel Illerhag	Joel Illerhag posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 14, Visits: 37	I would also like to have an answer to this question about making the mdf sealed. I guess epoxy would work? My model is very big so I can not afford to buy epoxy boards.
	Reply Like 4
Fasta	Fasta posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	Maybe you could epoxy seal, sand lightly and then spray a polyester pattern coat primer thick. Then cnc machine again. Sand and it ready. Fastacraft Facebook page
	Reply Like 5