[AT] OT Vulcanzing Rubber?

[Gene Dotson]

    Will
    Vulcanizing requires pressure and heat, typically 325 to 350 degrees 
depending on the compoung. You will need to start with green gum rubber and 
a compatible cement. Make a mold as George suggested and coat with talcum 
powder to prevent sticking.
    Gum rubber comes in various thicknesses from about 1/8" to maybe 3/8" or 
so. If you want to reinforce it, you can put plies of rayon or nylon cloth 
between the layers before forming it to the mold. Mylar sheet works good for 
working it into the mold as it won't stick.
    With it all set up, apply pressure on the steel plate and heat 
throughout for about 1/2 hour. Then remove the heat and allow to cool before 
removing fom the mold.

            Good luck with it...... Gene



----- Original Message ----- 
From: "William Powell" <william.neff.powell at comcast.net>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Wednesday, April 16, 2008 8:41 PM
Subject: Re: [AT] OT Vulcanzing Rubber?


> It's a seat hinge. The piece is a stamped metal piece that has about a 
> 1x1x1
> square cube attached to it that is rounded on one end to fit a tube frame.
> The rubber cube also has a small piece of pipe about 1" long and 3/8"
> diameter.
>
> I have been able to make the stamped piece of metal (in rough form) but 
> the
> vulcanizing process is new to me.
>
> Regards,
>
> Will Powell
>