A year or so ago I floated the idea of several tankers pitching in to have
an injection mold made for track treads. I was using e-Machine shop and it
looked like the tooling cost would be about $3k. I had exactly zero
interest. So, I developed a "screwy you guys, I'm going home" attitude and
decided to try something on my own J

 

-          Doug

 

From: [email protected] [mailto:[email protected]]
On Behalf Of Mike Mangus
Sent: Wednesday, November 02, 2011 4:29 PM
To: [email protected]
Subject: Re: [TANKS] track talk

 

 It would be awesome if there was a company that could make injection-molded
fiber-filled plastic tracks.  They could pop a few thousand out at a time.
heh.

 

 Has anyone thought of injection molded hulls or tanks as a possible lower
cost or less time consuming option to get more people into tanking?  I know
the plastics will hold up to the abuse.

 

Mike 

 

From: Susan Gutbrodt <[email protected]>
To: [email protected]
Sent: Wednesday, November 2, 2011 1:29 PM
Subject: Re: [TANKS] track talk

I'd be interested in some tracks gears etc for the Grant I'm going to build
and to re-fit the track system on the Brumm to make it more desert
friendly....

Kurt (don't forget the Alliance in the supply line)G

-----Original Message----- From: Frank Pittelli
Sent: Wednesday, November 02, 2011 10:52 AM
To: [email protected]
Subject: Re: [TANKS] track talk

On 11/2/2011 1:41 PM, [email protected] wrote:
> I know that molds have a finite lifetime. Typically
> how many castings can I expect to get from a silicone mold ?

When properly maintained, a rubber mold can be used for hundreds of
castings.  We've had no problem making tread parts for multiple tanks
with a single 8 tread mold.

Regarding set time: It doesn't take long to pour resin into 6-8 molds.
Once you've learned the process (spray, measure, dye, mix, pour, pop)
things go pretty smoothly.

> I'm leaning toward molding and casting myself, but I like Franks offer
> of "prototype parts for molds". At least I wouldn't need to make my own
> molds and I could still play with a Thing-O-Matic.

Now we're talking.  John White (KT builder) is ready to crank out dozens
of CAD designs for tank parts.  Together, we can form the un-holy
trinity of mold making :-)

Frank P.

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