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Old 01-02-2004, 04:12 PM
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Mold making questions

Hi guys iv been brousing around the preveous posts about mold making and everything. Iv read up the webpage fiberlay.com and dont wanna spend a alot of money on making a mold. Im getting a rollpan for my blazer that is fiberglass and it is gelcoated. I am wanting to make a mold of it so I can make a few more and make a few bucks, but I dont want to spend a few hundread on mold making supplies. Im woundering if I use duct tape on the gelcoated rollpan and use a mold releasing agent. If I can start applying fiberglass on it just like one layer. Then take it off and put the rest of the layers on the inside of the peice I am trying to duplicate to build up its strenght. THen bondo it and primer it and bolt it on my car. Would this work? What are some simple steps and cheap tips on mold making? Please help Thanks, Chris

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Old 01-02-2004, 04:34 PM
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For one thing, your 'new piece' wouldn't be the same size. And two, I don't think that would be ethical!
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Old 01-02-2004, 04:49 PM
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Its ethical and 1 fiberglass layer aint gonna make that much of a size difference. I will use 1 layer just to get the shape then Ill put 4 layers on the back to get the strength. I just need some tips and how to make a good mold release on a already gelcoated peice.

I know I can do it but I just need someone with experience to tell me how to make a good mold release and some pointers on what they would do.

Last edited by ChrisMiddleron; 01-02-2004 at 04:49 PM.
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Old 01-02-2004, 04:50 PM
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If you want to use the part to make more for sale you could run into legal problems if the original manufacturer finds out. Copying someone else's work and selling it is definitely not ethical. However, if you just want to be able to make a spare if you need it, the technique is pretty simple.

You can use the original part to make a mold by simply using a mold release agent on the gel coat. Cover that with chopped mat and polyester resin to make the mold. The mold will need to be at least a quarter inch thick for strength and when its finished just pop the original part out. Enough chopped mat and resin to do the job will probably cost you about $50.

All you need to do is coat the inside of the mold with release agent and reverse the process to make the part.

Centerline
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Old 01-02-2004, 04:55 PM
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Thank you I appreciate it
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Old 01-03-2004, 07:32 AM
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I have heard of molds made out of that spray in insulation foam. Use some type of release agent, coat the part, wait for it to harden, and remove.

Never tried it my self, but heard it works.
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Old 01-03-2004, 07:47 AM
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By the time you count labor,shop space ,tools and material.
You can buy a ready made.

Troy
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Old 01-03-2004, 07:31 PM
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I can see going thru that if you were making a custom piece. I could not imagine having the time on my hands to go thru that, when I could just buy one off the shelf.

I also don't have to time to be looking over my shoulder to see if they are after me for patent infringement.
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Old 01-04-2004, 05:06 PM
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a good mold release is mothers paste wax.
coat the original with the wax. buy a bunch of fiberglass matting and resing and make a mold using your original.
pop it loose once cured and now you have a mold.
sand and smooth the inside of the mold, then coat it with wax and lay in your resin and matting and make darn sure you get no air bubbles. build it up to desired strength.
but you didnt hear that from me.

or just go buy another one.

later bondo
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Old 10-04-2008, 03:49 AM
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Have you ever worked with fiberglass before?

If NO....proabably best to keep that answer. You are not making a part that is (a) no longer available, (b) original in design, and (c) that doesn't have a twenty different vendors already offering it.

Fiberglass is maeey, itchy, and just a general pain.

Like someone else said probably about 50 bucks to make them, plus your time and effort, shipping and handling, then you are now a manufacturer... liabilty if it fails.

So just how much money can you make on this?

Good Luck either way.
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Old 10-05-2008, 10:19 AM
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I've been making a few parts in my garage, learning as I go. Here's some links to the projects. You may pick up some tips from my mistakes! http://www.justanothertoy.com/bajaglass.htm
http://www.justanothertoy.com/tailgate.htm
Now I'm working on a new style hood for my 70 Buick GS. I just about have the plug completed. Then it's time to make a mold. I did some research on copyrights to protect my design, and it isn't out there. From what I've read, you can not copyright car designs, you can copyright logos and stuff, but that's why they can make Cobra kit cars, but Shelby has had issue with companies putting he Cobra on it.
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Old 10-05-2008, 10:35 AM
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Never Enuf, meet Zombie thread...


This zombie was 4 years, 9 months old, not a record, but close.


New members do it almost every time.. .(I done it too)
I'm just messing around.

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Old 10-05-2008, 11:15 AM
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digging up the dead, just in time for halloween.
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Old 10-05-2008, 11:34 AM
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Found the thread on a search, just went back and looked at the dates
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Old 10-07-2008, 02:03 AM
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Hmmmm what's worse.... I accidentally dug it up but you guys came by and visited with it. Actually it was a "related" link on the one thread I watch so I figured since it was related and they took the time to list it as such it was at least current. After I posted I noticed the date.

Oh Well....

Later.
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