 Composite mold making questions |
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| TonyAKAVW |
 Jul 16 2007, 01:48 PM
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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) 
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| geniusanthony |
Aug 2 2007, 07:35 AM
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Its a brand new "Chrome-sicle" Group: Members Posts: 517 Joined: 12-December 05 From: Alexandria,VA Member No.: 5,266 Region Association: MidAtlantic Region |
I have also done some composite work on R/C pylon airplanes and had good luck with mylar as a face for the mold. The product I used was an adhesive backed mylar film that had a low temp adhesive. This film was applied with a covering iron. Any hobby shop that sells R/C hobby products will be able to give you more information than I can recall from 5+ years ago. I wish you luck in your project however.
Going this route will save you time with sanding, painting, and polishing your part to get that perfect surface. I will advise that if you go this route, please practice on scrap first as I don't want to be the one to have caused a melt in your mold. There may be alot of help gained from a KNOWLEDGEABLE person at the shop. The material comes in 3 ft. wide rolls x 30? and the fact that the adhesive is heat activated will help avoid wrinkles as you iron and stratch the material over your plug. The heated adhesive will seal edges down so you could cover 1 section at a time. |
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Posts in this topic
TonyAKAVW Composite mold making questions Jul 16 2007, 01:48 PM
BahnBrenner914 First of all, SWEET! :woohoo: I'm an ME... Jul 16 2007, 01:53 PM john rogers A couple of questions, do the exhaust headers drop... Jul 16 2007, 02:04 PM URY914 Second of all:
WHY, To catch the oil? Jul 16 2007, 02:06 PM TonyAKAVW BahnBrenner: If my mold lasts I can make another ... Jul 16 2007, 02:21 PM BahnBrenner914 Well I thought you had a stock-type teener, so the... Jul 16 2007, 02:26 PM TonyAKAVW Here's kind of what I anticipate the fitmet to... Jul 16 2007, 02:34 PM neo914-6 Tony,
Appears you are actually making a part with... Jul 16 2007, 02:53 PM TonyAKAVW Felix: Not sure about what you mean in terms of w... Jul 16 2007, 04:20 PM
neo914-6
Felix: Not sure about what you mean in terms of ... Jul 16 2007, 05:12 PM
okieflyr My experience is vacuum bagging 60" composite... Jul 16 2007, 07:36 PM iamchappy I might be easier to make it out of aluminum or st... Jul 16 2007, 04:42 PM GWN7 Chappy's right....it would be easier to make i... Jul 16 2007, 05:01 PM JPB Its not to hard to do Tony. If your mould is smoo... Jul 16 2007, 05:08 PM Brando Get ahold of the pan/diffuser for a 964 or 993 and... Jul 16 2007, 05:40 PM TonyAKAVW From the reading I've done, it seems that 10-1... Jul 16 2007, 06:13 PM kwales I've used plaster of paris before, casts smoot... Jul 16 2007, 07:38 PM TonyAKAVW First of all, thanks for all the tips! I... Jul 16 2007, 07:50 PM okieflyr Unless you are using a very specialized resin, you... Jul 16 2007, 09:46 PM GWN7
First of all, thanks for all the tips! I... Jul 16 2007, 10:08 PM fat73
First of all, thanks for all the tips! I... Jul 19 2007, 10:53 PM kwales If you are careful (NO FIRE OR FLAMES) , a cardboa... Jul 16 2007, 07:55 PM URY914 I've been kicking around bilding one for my ra... Jul 16 2007, 08:30 PM URY914 mo Jul 16 2007, 08:31 PM URY914 llll Jul 16 2007, 08:32 PM tdsmoonchild just remember that if you make it, and it's co... Jul 16 2007, 08:34 PM URY914 On some of them the vertical fins are bolt on not ... Jul 16 2007, 08:41 PM iamchappy These things are way cool. You have a great idea h... Jul 16 2007, 08:43 PM TonyAKAVW Paul: Nice pics! There's a web site (unfo... Jul 16 2007, 08:45 PM Joe Ricard Yup I want one for lapping days and commuting back... Jul 16 2007, 08:57 PM TonyAKAVW So tonight I finished stripping the metallization ... Jul 17 2007, 01:23 AM TonyAKAVW view from the other side. Jul 17 2007, 01:24 AM highways Oh boy, don't burn that foam. No hot knife all... Jul 17 2007, 02:47 AM URY914 Tony,
If I were you I would make this as easy a... Jul 17 2007, 08:02 AM andys
Tony,
If I were you I would make this as easy ... Jul 17 2007, 10:58 AM TonyAKAVW Okay, so it sounds like there are a bunch of diffe... Jul 17 2007, 12:49 PM TonyAKAVW Thanks for the tip! I've got to be carefu... Aug 2 2007, 11:19 AM geniusanthony if you do a search and find the sites of Coverite,... Aug 2 2007, 07:52 PM |
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