Composite mold making questions |
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Composite mold making questions |
TonyAKAVW |
Jul 16 2007, 01:48 PM
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#1
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That's my ride. Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None |
I want to make a diffuser/engine pan for my car, and last night I started gluing foam sheets together to make a mold. My plan is to form the foam into the shape I want and then seal it with body filler, and then primer and polish. I have been reading up on making molds for composite work and most seem to talk about making a copmosite piece for the mold rather than what I am planning. If I make my mold as described will my composite part rip the mold apart when I seperate the two? (assuming I use a PVA mold release film).
Also, if I make the part with carbon fiber, how do I finish the edges of the piece when I'm done? I would like to vacuum bag this part because the part will be visible from the top and the bottom... Can I get away not bagging it and get a decent finish? (I'm not super concerned that it has a perfect surface really). -Tony Finished part will look something like this... With the long straight edge meeting up against the firewall and the two tunnels exiting right under the bumper. Attached image(s) |
TonyAKAVW |
Jul 16 2007, 02:21 PM
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#2
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That's my ride. Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None |
BahnBrenner: If my mold lasts I can make another copy.
John: My exhaust sits up almost against the floor of the rear trunk. I did this knowing that I would eventually put in a set of tunnels. The exhaust will exit either through my bumper (a pair of holes, one on each side of the licenes plate) or through the gap between the lower edge of the bumper and this diffuser plate. (which will sit 6-7 inches below the bumper, with the top of the tunnels almost touching the bumper ) So my exhaust headers turn up, right after the engine, which is at the point of maximum clearance from the tunnel roof. My design has the enitre panel attach to the firewall/floorpan point. So there will be no gap between the diffuser and the floor pan. Paul: Subaru engines don't leak oil (IMG:style_emoticons/default/smile.gif) At least not much. There are a few reasons for doing this. First is an expired reason. I had planned on using this as part of my mid-mounted radiator cooling system, as a way to exhaust the air better. Since I moved the radiataor up front, that is no longer necessary. Another reason is that without a rear valence, the car looks uncomplete. I don't really want to put a rear valence on and wanted to do something different. It will actually serve to keep a little road grime out of the engien bay area too.. And lastly, I have always wanted to make something out of composites, so this being a relatively simple shape, seemed like a neat first project. I don't actually expect it will make much difference in terms of driving. First of all I don't drive fast enough, and if I did I would be worried about the front end lifting. |
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