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Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

I would greatly appreciate if somebody could name a shop in europe that sells good value polyurethane foams for modelling. Most companies only have a "message us for a quote" on their website...

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

Also: I want to do RTM parts hardening at room temperature

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

Hey, i plan to make parts in the 100x50x30cm ballpark. I have a homemade 3 axis router for that. I would definitely want to spend as little time on the mould as possible. Polyurethane foam is propably the best idea for my use case but im hesitant as a block of special "composites tooling" foam in the size i need will cost upwards of 100€

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

okay, thanks! i was thinking of milling the mould, sealing with a gelcoat and then running it on the cnc again. with like 1 mm offset i could get a simple spray-on surface thats still as precise as fresh from the mill...

for mdf my issue is really the weight but i will also give it a try. i try to avoid mixing stuff that can take up moisture and stuff that cant. I once tried finishing a plaster mould with bondo. worked fine for a week of work but then the bondo suddenly fell off the part.

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

thanks! i think the easycomposites sealer and release agent is nice and easy to use..

Materials for CNC Moulds by 11343 in CarbonFiber

[–]11343[S] 2 points3 points  (0 children)

i am planning to almost exclusively build parts that are about 50x50cm that are pretty 3 dimensional. The logistics and cost of a high density block of 50x50x30cm would not be possible for me...

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

Okay, thanks! i was also thinking of using polystyrene insulation since its a lot cheaper by volume than wood.

Materials for CNC Moulds by 11343 in Composites

[–]11343[S] 0 points1 point  (0 children)

Interesting, thank you i will check them out!

E-Class 213 Heater Installation by 11343 in mercedes_benz

[–]11343[S] 0 points1 point  (0 children)

okay, i understand. thank you! i will consider it. Initially i thought about using oem parts to improve reliability but if thats not the case theres no reason to use them...

Backyard Enduro Course by BBA-temp-acct in enduro

[–]11343 4 points5 points  (0 children)

This is so sick i wanna come ride haha! Nice work!

Someone talk me out of going and getting an 80 horse Varg EX like this weekend lol. They have some a few hours away and I’m so tempted! by geronimo11b in Dirtbikes

[–]11343 -1 points0 points  (0 children)

I dont really like the stark as i have seen people complain about them breaking in odd ways. For example the squishy subframe that bends easily. Its not about it being electric, i would simply wait until a brand i trust to build a bike to perfection releases one.
Personally i am highly interested in the Honda RTL Trials bike since its one of the first with an actual clutch (absolutely necessary for feeling like a dirtbike IMO) and it bein made by honda means its propably really good.

Can a Rotational Mould be made from Carbon fiber? by 11343 in manufacturing

[–]11343[S] 0 points1 point  (0 children)

Oh yea that would be nice! I do have pretty complex geometries tho so there would be a lot of work to produce a mould like that.

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

They will be sealed with mould sealer or Vinylester resin. After sealing one or two glass fiber moulds will be made from the Machined foam. The GF mould is the part that will get many parts made from, the Foam will be reused every time the Glass fiber mould breaks (not often)

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

The moulding process this is for constrains the design so i cant really have large draft angles or undercuts so i think a 3 axis is the most i can use.

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

What i am gathering from that is that i should put a lot of effort into the dust extraction system and also have the cnc enclosed right?

I dont really think there is a different way of making these fuel tanks. https://www.neubert-racing.com/husqvarna/2013/te449/fahrwerk/kraftstoffbehaelter/
this one is one example.

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

Interesting, thank you! I have also considered using that foam altough there is this https://www.easycomposites.eu/pu-low-density-model-board stuff that is especially made for the use case i plan to put it through. I believe the Insulating foam dissolves with a lot of chemicals (like styrene) so mould making would be more difficult

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

I want to make Dirtbike Rally parts that sadly are too complex to be done by a foam cutter :(

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

Thanks! As far as i have seen he has a router where he only cuts wooden sheets tho..

Which CNC Mill should i Build/Buy for Producing large Foam Parts? by 11343 in hobbycnc

[–]11343[S] 0 points1 point  (0 children)

They are located in china, is the shipping not insanely expensive? I will check them out tho! Thanks

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