Vacuum forming coil housings.

[MartinB]

I believe those forms are from an old member on Geotech "Charles from upstate New York". He was making coils and water proof Explorers and Etracs. Thats a good deal if you have a vacuum former also includes the winding forms

Well worth the price. It would take quite a while to make these. Pity there is no shipping to the UK

[Altra]

Too bad all the photos are gone

https://www.geotech1.com/forums/show...ere-you-go-Reg

[Carl-NC]

I would buy them but I don't know what I would do with them, I have no vacuum table.

[bklein]

Did you make a coil with the 5x18?

[Carl-NC]

I have one of those housings, did I buy one from you? It was my intent to build a Bigfoot coil but never got around to it.

[bklein]

From the above link you got it from the guy with eBay ad. Let me know if you want to sell it….

[David_1]

opps..

[cristiano.sar]

This was my first vacuum form try, but I failed.

I think this polystyrene (2mm thick) plastic is too brittle.
I need to find an ABS sheet but it is difficult here in Brazil.

[David_1]

cool ive built the vacuum base, but the plastic I have is wrong.... going to watch you vid now

[Op04]

This was my first vacuum form try, but I failed.

I think this polystyrene (2mm thick) plastic is too brittle.
I need to find an ABS sheet but it is difficult here in Brazil.

The ear part is too thick, make it thinner. Good luck!

[MartinB]

This was my first vacuum form try, but I failed.

I think this polystyrene (2mm thick) plastic is too brittle.
I need to find an ABS sheet but it is difficult here in Brazil.

You will have several fails before you get it right. Keep on trying. Looks like your plastic cooled before it had fully formed. You probably need more holes in your vacuum bed. Make sure these follow the inner and outer perimeters of your former, especially on the tight inside curves. Also, drill a few small holes through your former between the lugs. If you don't want to re-drill your vacuum bed, lay over a piece of ply or MDF with holes drilled to suit your former. The oven method never worked for me because the plastic cooled to quickly, so I built a simple forming machine with integral heater.

[dfbowers]

I now use a two stage vacuum system. For years I got away with just using a shop vacuum.. You can make up for the lack of high vacuum by getting the plastic hotter but there is a very fine line between too hot and too cold. You can do it but will waste some plastic until you get the correct time an temperature.

[David_1]

I now use a two stage vacuum system. For years I got away with just using a shop vacuum..

can you explain a little more please.. I am just starting with a shop vac ??

[cristiano.sar]

Thanks all for the tips, I will try with a thinner plastic (1mm), also I will pay more attention to the temperature and reduce the ears thickness and open some holes near them.

[dfbowers]

Try this link..
https://sites.google.com/site/dbcoil...-vacuum-tables

Don..