Re: Custom rubber parts

If I'm understanding your question correctly, yes, you can make a pattern from wood, pull a urethane or silicone mold from it, then cast the part into your new mold. The secret is to thoroughly seal the wood to prevent the mold material from bonding to it. Shellac or a polyurethane finish work well. Don't forget to use mold release... ask me how I know! If you use a relatively soft material for the mold, you can skip putting draft on the part (the slight angle that allows you to remove a part from hard tooling without the use of bludgeoning tools, usually destroying the part, the mold, or both).

With the addition of CNC machines we've gotten away from soft tooling, although we did a couple runs of Shelby Cobra engine mounts a few years back (2000-2002) using this method and a recent look at the molds reveals that they are still in good condition.

Most companies that sell mold-making products will have sampler packs of both the mold and part materials available so that you don't have to buy large quantities just to try a product out.

After reading this I went out to look at my '62 wagon - it was parked in 1979, the seats were folded down and the windows lowered so the owners (who also owned a marina) could use the car for an antifreeze buggy for winterizing boats. As a result, my bumpers are in comparatively good condition.

Let me know if I can be of assistance if you decide to mold these, or any other small pieces, for that matter.

On Saturday, April 26, 2014 7:04:25 PM UTC-4, Poluda wrote:

could you make that part from wood and use it as a prototype ???

On Sat, Apr 26, 2014 at 9:05 AM, hmse...@xxxxxxx via The 1962 to 1965 Mopar Mail List Clubhouse <1962to19...@googlegroups.com> wrote:

Ricky

Yes There are many types of Products and sources on the Market to make what you need.
Companies that do Rapid Prototyping can reproduce your parts.They make a Rubber Mold from your sample and then pour you new parts with a 2 part mix .
Two issues , You need to provide a Good Sample ( you might have to reshape yours to back to the Orig size that you want( The molding process will give you a exact repro of your sample)
Also must tell them what Hardness of the end pc. you application requires
A good Rubber Mold will give you 8-10 pcs.

For the Matl , go to Goggle or Amazon and Search ,
RTV silicone rubber

A good source that I used for the same reason is ;

Vaupell Rapid Solutions
20 Executive Drive
Hudson, NH 03051
Tel: 603-577-9970
Fax: 603-577-9968

Try searching for Rapid Prototyping in your area, Just be sure you talk to the Engr. with your requirements.

Gary Goers in Mt. make many rubber parts for all Mopars , All you need to do is ship him the sample, Gary does not have many Station Wagon parts and his lead time is long
He only only works by Fax. 406-752-6249, email ,ga...@xxxxxxxxxxxxx
Let me know if I can help in anyway, I have learned the hard way
Mark Evans

-----Original Message-----
From: Hall, Ricky L <ricky....@xxxxxxxxxx>
To: 1962to1965mopars <1962to19...@googlegroups.com>
Sent: Fri, Apr 25, 2014 2:49 pm
Subject: Custom rubber parts

Is there a two part urethane rubber compound to pour your own rubber parts? Or a company that could do it small quantity reasonable?

The rear seat back on my wagon has 5/8” x 1” x 3/4” rubber bumpers it rests on in the upright position. They are hard as rocks from age. Not something I will find reproduced most likely........ They have two counter-bored holes for mounting them and the seat release spring clip, with two #8 sheet metal screws.

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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!

1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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