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, 07:50 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 |
First of all, thanks for all the tips! I'm going to put this stuff in a progress thread soon.
So about heat... I am goig to be curing this inside my garage, which means I can't really take the temeprature up above say 100 degrees for maybe an hour before my propane heater runs out. Its my understanding that there are room temperature curing resins. Are they far inferior to heat cured resins or is it a matter of time? As far as a vacuum pump goes, what are the cheap options? I've seen some people using refigerator compressors.. Can I use my air compressor inlet? How much of a vacuum really needs to be pulled anyway? -Tony |
fat73 |
Jul 19 2007, 10:53 PM
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#3
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W9R1 Group: Members Posts: 244 Joined: 7-May 05 From: tampa,fl Member No.: 4,043 Region Association: South East States |
First of all, thanks for all the tips! I'm going to put this stuff in a progress thread soon. So about heat... I am goig to be curing this inside my garage, which means I can't really take the temeprature up above say 100 degrees for maybe an hour before my propane heater runs out. Its my understanding that there are room temperature curing resins. Are they far inferior to heat cured resins or is it a matter of time? As far as a vacuum pump goes, what are the cheap options? I've seen some people using refigerator compressors.. Can I use my air compressor inlet? How much of a vacuum really needs to be pulled anyway? -Tony http://www.fibreglast.com/ sells instructional DVDs. Ed aka W9R1 |
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