Spidey Costume

[ynneb]

Hey Brad, I notice you are making negative molds. What would happen if you made it as positive and used silicon to make the negative mold?
The other question is, can the wax be remelted and used again?

[spidey4fun]

Originally Posted by ynneb Hey Brad, I notice you are making negative molds. What would happen if you made it as positive and used silicon to make the negative mold? The other question is, can the wax be remelted and used again?

Hey Ben,

I'm making the part for a guy in the UK and he's got plenty of moulding skills but just thought it would be easier and more accurate to have it cut on CNC. So the easiest thing for me to do is cut a negative...fill it with resin.. pop out a master and ship it off. If / when I get around to needing this part I will most definately cut a positive, like I did for the fins and just cover it with silicon.

Yes... the wax can be melted down and used again. That wax used below was also used to make the belt centre and fins. After I've made the piece I require I just melt it down with the wax dust I collected during the cut and start over.

Brad.

[ynneb]

What is the wax called? Is it expensive? where do you buy it from?
When you remelt it. does it from correctly, or does it have a warping effect like when pouring candles?

[spidey4fun]

Hey Ben,

www.australianwaxco.com.au It's called engineering wax. The guy you need to speak to is Bill Cassidy. Tell him you've been speaking to Brad in Geelong. Cost $10.67 per kilo $50.15 per slab. Not sure how big a slab is.

I just bought some baking trays and heat it slowly on my electric stove. It does slightly wave on the top but I mill into the base. The slight waves on the top still allow it to sit flat on the CNC table.

Brad.

[ynneb]

Funny, I have actually been to that factory myself. (Kids went through a candle making phase) Is the engineering wax harder than candle wax, as I ow remember I have a slab of candle wax here.
Thanks for the information.
BTW if there was a vote for the best display at the BBQ the other week, I would have picked yours because you demonstrated a lot of uses for your CNC machine.

[ynneb]

Here is a short video of Brads machine in action.
http://www.youtube.com/v/ugepIp45HbY&hl=en

[spidey4fun]

Here's my first attempt at using resin. I'm pretty happy with the results!!





I re-made the mould shown below... made it 2cm smaller and used an STL file for the model. The DXF file didnt look that smooth in the end, but that was probably just the way I saved it.

Brad.

[Greolt]

That looks to be a pretty good finish on it Brad.

Any steps to achieve that between machining it and moulding the resin?

Greg

[spidey4fun]

That's straight from the CNC. 1/8 rough cut B/N bit. 1/8 Parrallel finish 10% step. 1/8 Parallel finish 5% step but 90degree from first. And finish with a 1/32 FN bit 10%...which took about 6 hours. The finshed piece is a polyurethane resin.

[Greolt]

Wow.... no wonder you got a good finish. 4 passes.

Greg

[Kipper]

I'm amazed and hooked by this thread! You're my superhero :beer: Have a nice cold one on me!

[CheekieMonkies]

You guys are mad!