how to create a mould of the plug with wrapped edge?


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skylight
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I have a plug finished with wrapped edge. it is a car front lip part. As you can see in the attachment, it has a basic flat surface when you view from top. But from a vertical cut view, the edge on the front wrapped down and back about 2cm. I have the plug finished, but having a difficult time to create the mold from it. please give me some suggestions.

thanks.

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lip.jpg (503 views, 44.00 KB)
Warren (Staff)
Warren (Staff)
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A 2 part mould is probably best with the main part being the upper surface and the smaller second part of the mould being the lower half of the splitter.  Being thin and long, you should be able to easily envelope bag the finished mould so you don't have sealing issues on the join line.


Warren Penalver
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scottracing
scottracing
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as warren says a 2-piece mould is your best option, where the leading edge (the c-shape) is I would split it in the middle or at the end and create the upper skin and a return flat, which is your attachement lip to the front bumper. At the same time you might be able to incorporate drill bushes or even location points to add fasteners at a later stage.


skylight
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scottracing - 10/5/2017 12:57:52 PM
as warren says a 2-piece mould is your best option, where the leading edge (the c-shape) is I would split it in the middle or at the end and create the upper skin and a return flat, which is your attachement lip to the front bumper. At the same time you might be able to incorporate drill bushes or even location points to add fasteners at a later stage.


Warren (Staff) - 10/5/2017 8:24:27 AM
A 2 part mould is probably best with the main part being the upper surface and the smaller second part of the mould being the lower half of the splitter.  Being thin and long, you should be able to easily envelope bag the finished mould so you don't have sealing issues on the join line.


thank you both for the great information. I will go with 2 part mould then. What's in my mind is:
1. Split at the bottom, so i will have a upper 'L' shape, and a lower 2cm flat piece.
2. when joining, i will have the lower part extended to the back of the upper L shape.

I will be doing resin infusion, is envelope begging good for infusion? so i read a post in this forum, people are saying using silicone sealant to seal the join to prevent resin leaking, what do you think?

One last question, just for curiosity, what will be the issue for 1 part mould for this plug?

much appreciated. 
 

oekmont
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Based in your drawings I see no reason why it can't be done with a one piece mold. If you look from the front, there are no undercuts.

Edited 7 Years Ago by oekmont
Fasta
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I'll vote for the one piece mould too.
Big flanges.
Vac infuse the part.




Interloper393
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1 piece mould and you could poss even remove part of the c part so it's more a j shape? 
skylight
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Interloper393 - 10/6/2017 10:37:47 AM
1 piece mould and you could poss even remove part of the c part so it's more a j shape? 


Fasta - 10/6/2017 7:52:28 AM
I'll vote for the one piece mould too.
Big flanges.
Vac infuse the part.

My original thought was to create 1 peace mould, but 2 piece mould will be way easier to pleat the cloth to conform to corners then join at the bottom corner of the C shape. 1 piece mould will be a little difficult to make sure the surface at the C section smooth. I don't have much experience, but this is just my theory after thinking both approach.

Thanks again.






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