ABS repair - how to take a mould of shape

[Jim77]

Hi again
Took my caravan out of storage to find damp/rot in front end.

Cause is two 6 inch splits in the abs front panel. I have removed all of the front wallboard and timber to access the spilts to rep[air with ABS patch welded using acetone.

My problem is that the panel has a profile like lightning bolt sort of shape and I want to shape the patches before fitting them.

Can anyone suggest a method of taking a mould of the shape and what material to use eg plaster, plasticine etc.

Thanks
Jim

 

[RedHerring2]

Ask these people:
http://www.tomps.com/shop/index.php

 

[Jim77]

Thanks
I've sent an enquiry.

Any other suggestions please in the meantime?

Jim

 

[gregers]

maybe smear with vaseline and then pump a load of silcone on the profile work it in,when its dry/go off just peel it away,hey presto theres your mould.

 

[Mickymoody]

Am I reading this wrong, or can you not use fibreglass? as the raw material? Put down the fibre, then add the glue, in layers??

 

[Jim77]

Thanks gregers, good suggestion but not sure if the silicon will be rigid enough for a mould - I'll give it a try.

Micky. fibreglass and ABS are totally different and dont "mix" - however it may be possible to use some other kid of mesh/material to follow your suggestion. Food for thought, Thank you.

Jim

 

[Alastairreid]

Back to schooldays.

papier mache

http://www.papiermache.co.uk/tutorials/getting-started-with-papier-mache/

 

[Jim77]

Great tutorial and a real possibility. Thanks Alastair.

Jim

 

[Jim77]

Received reply from tomps (see post 2)

Same suggestion as gregers.

you could use silicone for an impression it will require thixo to
stop it running.

it will also need some kind of support on the back to retain shape.

Jim

 

[TicklyT]

Plaster impregnated bandage, as used for medical plaster casts etc.

I used them to take an impression from a specially moulded wheelchair seat to make a fibreglass facsimile of the original moulding.

Here's some picked at random off the interweb:
http://www.tiranti.co.uk/product.asp?Product=1023
http://www.ecfibreglasssupplies.co.uk/p-2126-plaster-bandage-15cm-wide.aspx

Or make friends with a plaster room nurse......

 

[HERTS P&D]

Or make friends with a plaster room nurse......

Only if she brings her uniform,,,,,,,,,,,,,,,,,,,,,

Andy