By crice - 4/13/2016 10:53:31 AM
Hi, new here.
Only done a couple of simple carbon parts before but have a slightly more ambitious project in mind which I don't know how best to approach. How would you set about making a fairly thick section solid carbon part - think something like HANS device (don't worry I'm not attempting to make my own HANS!).
I understand the principles of vacuum bagging but if you have a split enclosed mould (like an injection mould tool), how would you ensure complete fill, create the pressure and where would you evacuate any excess resin (assuming pre-preg)?
I guess the tool would want to be aluminium and heated so as not to take too long to come up to temp in an oven?
Thanks for your assistance.
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By crice - 5/2/2016 4:50:08 PM
Thanks for replies so far. My concern is 'filling' the mould, regardless or whether you use pre-preg or an infusion process, to prevent a part with excess resin you need to ensure you have the cavity 'full' of CF - easier said than done! Any suggestions on that front?
Re: reply by VVF, I too used to work in injection moulding, admittedly as a design engineer not as a machine setter but that is the first I've heard of 'exit ports' on a mould tool. Usually a 'shot' of plastic is injected and a holding pressure is then maintained as the part cool and shrinks, it is this holding pressure which helps ensure the part conforms to the mould cavity with less shrinkage and warpage, at least that is my understanding, maybe there are different ways of doing things. Of course I'm talking about regular injection moulding too, not compression moulding.
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