Custom Vacuum Former

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FluxNZ
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Custom Vacuum Former

Post by FluxNZ » Tue Jan 17, 2012 11:16 pm

Built this vacuum former for my new build and other body work. Simple setup that has been done before that I have tweaked to suit my needs. Still waiting on heat source before I can test it out.

Plastic sheet is sealed between the 2 frames and bolted down.
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Vacuum holes for void between top and bottom sheets.
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Still have to add the rubber seal to the base (or frame) to create a seal when frame is lowered onto base.
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Guide post around outside to help aligning the frame over buck.
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Couple of test bucks.
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Last edited by FluxNZ on Tue Jan 17, 2012 11:54 pm, edited 1 time in total.
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Post by SLAYERDUDE » Tue Jan 17, 2012 11:20 pm

OOOOOOOHHHH!!!!
Freakin sweet toy! :twisted:
So when does Savage XL body production start? Image
[img]http://i794.photobucket.com/albums/yy229/rc1/Avitars/sc.gif[/img]

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Post by FluxNZ » Tue Jan 17, 2012 11:28 pm

No idea as of yet :D
I just used some bodies I have here and cast those ones so they are not my handy work. Been thinking of a design but need the right gear (clay, tools etc) to make it. The former is this size for the 1/5 scale bodies but I can use a smaller frame to do the smaller bodies: 1/8 buggy/truggy etc.
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Post by SLAYERDUDE » Tue Jan 17, 2012 11:41 pm

I probably have some buyers for 1/5 bodies if they are priced right!
$100+ for a body is pretty crazy, another reason I'm not interested in 1/5.
[img]http://i794.photobucket.com/albums/yy229/rc1/Avitars/sc.gif[/img]

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Post by FluxNZ » Tue Jan 17, 2012 11:47 pm

Yeah if I can get the design right then maybe people will be interested but I know shipping a 1/5 scale body to me (NZ) is about $50US so that would take the sting out of it but you never know. Plan on starting out with 1.5mm lexan maybe thicker just have to test first.
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Post by rumpity_z28 » Tue Jan 17, 2012 11:53 pm

now THAT is slick, incredible work fluxnz

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Post by FluxNZ » Wed Jan 18, 2012 12:01 am

Not that hard to do.

A lot of the MDF was seconds that you can get cheap. Standard nuts/bolt/rubber seals from the hardware shop (about $70NZD all up).

Lost count of how many holes I drilled in the top (I was drinking alcohol at the time so it wasn't so tedious)  :D
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Post by rumpity_z28 » Wed Jan 18, 2012 12:48 am

how did ya make a mold for the truck body?

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Post by FluxNZ » Wed Jan 18, 2012 12:55 am

Plaster of Paris poured into the car body. Body has to be well supported or it will deform. I used some wood to fill out most of the body so not to use too much plaster. The plaster isn't very strong but these are just tests for now.
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Post by rumpity_z28 » Wed Jan 18, 2012 3:01 am

Thats interesting, makes a guy wonder if he could fill the whole mold with plaster

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Post by FluxNZ » Wed Jan 18, 2012 3:07 am

You can but with a large mass like that it can take a long time to dry thats why I reduced the volume of plaster used.
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Post by FluxNZ » Wed Jan 18, 2012 3:39 am

Oh and the body will deform with all that plaster in it unless you add some serious bracing around the body :wink:
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Post by rumpity_z28 » Wed Jan 18, 2012 3:43 am

aaaaaaah ok i see your point well at any rate i've got to try this out in the spring when its time to get the savy's ready for play, the bodies just dont hold up to abuse for very long.

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Post by cdziak » Sat Jan 21, 2012 10:08 am

FluxNZ, what are you using for your vacuum source? And what is the heat source for? Does it soften the plastic material to allow the forming? Sorry if these are ignorant questions. I would love to build a setup like this. I mess around with a product called Alumilite using silicone mold rubber to make molds of parts and recreate them in plastics. I mainly do emblem recreations. RC parts need stronger material. If I could find liquid delrin, I could make stronger rc parts from molds.

Thinking out loud, you could silicone / rubber mold a body, then pour the plaster in the rubber mold.

Intriguing... :idea:
75 RCs and counting...

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Post by FluxNZ » Sat Jan 21, 2012 4:00 pm

Home vacuum cleaner will be used as a vacumm source as a first test option as many have used this before with success. Heat source is to heat the plastic so it becomes flexable enough to stretch over and forum around the mold when vacuum is applied.

I'm using plaster of paris as a test using PVA (water based white glue mixed with the water first) to make and extra hard plaster. Plaster does shrink over time and have notice this with one of my casts of my buggy VE8 body which has a solid piece of timber inside to take up a lot of the mass has some cracks within the plaster. Thing is when you remove the plastic from the mold the mold can be marked or damaged if it's not hard enough. Epoxy cast is the way to go from what I've read for a hard mold. I have looked at casting the outside of a body to form a mold that can be poured into but run out of glue with all the testing :(

I built the refective box for the heater yesterday which helps even out the heat by the time it reaches the plastic at the top of the box.

I hope to do a test today with some scrap 4mm plastic I have laying around which is a bit too thick but it's just a test.
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Post by Beavinator » Sat Jan 21, 2012 4:09 pm

Thats AWESOME!!!

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Post by dodgedude » Sat Jan 21, 2012 11:33 pm

8O Dude, One good write up on this whole deal away from me recommending for a spot in the stickies for Hop ups or Tech Tips  :D

I cant wait to see where you go with this once its fully up and running
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Post by FluxNZ » Sun Jan 22, 2012 12:45 am

Double post for some reason 'Doh!' :roll:
Last edited by FluxNZ on Sun Jan 22, 2012 3:06 am, edited 1 time in total.
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Post by FluxNZ » Sun Jan 22, 2012 12:48 am

Thanks for the comments Beavinator and dodgedude
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Post by FluxNZ » Sun Jan 22, 2012 11:22 pm

Changing heaters as I'm not happy with the current one only being a single bar (1800W). Working on using 2 1000W heaters will even out the heat at the top of the box better :twisted:
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