Mould making mistake ?

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Mould making mistake ?

Author	Message
santana-dk	santana-dk posted 12 Years Ago HOT Topic Details
Group: Forum Members Posts: 3, Visits: 140	Hello I have recently took the plunge into making a carbon fiber part for a GT style wheel plate that i use to my hobby that is Simracing. The part was skinned with Carbon vinyl and i wanted to make the part as part of a educational project since taking a plastic makers education here in scandinavia. The part that i will be making a a mould from is a one piece of acrylic that has been painted black. All the sharp edges has been sanded down so that laying the carbon mats in the mould wouldn't be a problem. I have followed all the procedures explained the here:http://www.easycomposites.co.uk/Downloads/TDS/EC-TDS-Epoxy-Mould-Making-Kit-Instructions.pdf using both the wax release agent and the PVA to ensure that the mould would easily detach itself from the part. but my real problem is that now that the mould has fully cured i doesn't seams that it is separable. I have used plasticine to close all the holes in the part. -I have ensured that there is no mechanical lock at all visible side by means of working the part with a dremel tool just to be certain. Stil the part won't come off! I don't know it if i used too much putty in the making; i could had used 1/3 less putty material and at some parts the putty is more than 2 cm thick. So I Would be more than glad to hear from all of you what mistakes I have done and what course I should have done instead. Last i would like to hear if it's still possible to take the part out without damaging both the part and the mould or if it is a total redo thank you for you time Santana Attachments 426214_442822409088916_1985367783_n.jpg (248 views, 69.00 KB) 2013-05-04 13.06.11.jpg (262 views, 2.00 MB) 2013-05-06 13.24.43.jpg (256 views, 1.00 MB)
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apostolos	apostolos posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 1, Visits: 1K	try to wash it with hot water !!!
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WilliamsHPF	WilliamsHPF posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 26, Visits: 349	I second apostolos' idea... hopefully the hot water bath will cause the PVA to disolve and allow the part to be removed. if for some reason it doesn't pop out after the soak, try using some compressed air to blow it out. good luck
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carbonfibreworks	carbonfibreworks posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 292, Visits: 4.5K	Hi Santana You say you have painted the component black, what type of paint did you use ? if you used a car shop type rattle can paint this could be your problem. If so you will probably have to destroy the part removing it and have some repairs to do on the mould. Regards Chris
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zacomposites	zacomposites posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 17, Visits: 1.8K	the last picture looks like u got quite a number of access to start put in wooden spatula especially that square section is nice to start with.try to lift up using a small flat head hard thing, then use spatula and work your way around. sand the spatula so that its a bit chamfer to make lil bit it easy to put it in.
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fgayford	fgayford posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 433, Visits: 1.2K	Heat can do wonders to get parts to ease up a bit and release. I would (and this only my opinon) if I had no options is to heat the whole thing up almost to hot to touch and then work up an edge and wiggle in with thin wedges and more heat as needed. Hope this helps. Fred
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santana-dk	santana-dk posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 3, Visits: 140	firstly thank you very much for all the tips!! highly appreciated some things you just don't learn at school i did get the part out without damaging it and making a mess out of the mold. a few light scratches but nothing that can't be buffed out. I did use a mix of heat and a few woodden wedges to get it under it and suddenly POP. thank for you your time and help. now it time to bring out the kevlar/carbon
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