I would suggest you using one piece mold as you posted here:
Simply if this is one time part make your mould thin enough to be flexible- thats it.
Bonobo,
If you’re going to be in So Cal let me know… I am always up for meeting, I wouldn’t call me a pro though, just an avid learner.
I would agree with Fiberpro above, except that your drawings thus far haven’t included thought to the sides or ends of the spoiler, which if the entire thing was one piece, there wouldn’t be anywhere for the mold to flex. Multi-piece mold however won’t raise concerns about the complete lamination of the piece.
You have mentioned in the past that you were curious about your “barrier” material. I’m not exactly sure what it is that you are referencing. Are you referring to a material to use as a flange material that you can bond to the plug so that you can begin mold construction?
Also, with regards to your flanges, the top split will only need to be large enough to accommodate alignment fixtures and mechanical fasteners (bolts) to assemble the two halves together. The bottom flanges will be used for material run off during the layup. Assuming that you’ll be envelope bagging this piece (if you are vacuum bagging it), the bottom flange will only need to be a couple inches, at most.
I hope this helps… I’m here to continue if I am being a help at all, just let me know if you’re finding any fault with my posts, I don’t want to hinder your project in any way.
-C
Corban
“You have mentioned in the past that you were curious about your “barrier” material. I’m not exactly sure what it is that you are referencing. Are you referring to a material to use as a flange material that you can bond to the plug so that you can begin mold construction?”
That’s excatly what i mean, sorry if i’m using the wrong terminology?
i’ve seen people use a fluted polypropylene (corex)
"Also, with regards to your flanges, the top split will only need to be large enough to accommodate alignment fixtures and mechanical fasteners (bolts) to assemble the two halves together. "
Correct! as for alignment fixtures, i guess you just drill through the 2 peices while they’re together and use bolts of the correct size to clamp together and hold the pieces aligned.
Here i have illustrated how the two parts of the mold will look with the top split circled in black and the undercut areas in magenta.
I think smoothing out the corners in these areas will help with lay up and release, what do you think?
bottom picture shows the smoothed out version.
i can put a small radius on the plug where it meets the body and maybe a wax fillet where the barrier meets the plug.
AaronVenable
i get what you mean with the lines now! i think you’re right.
i will have to check out japanese nostalgic car too!
These sharp corners will not survive for long.
How about a second piece, which bolts on the car, with the actual spoiler glued or snapped on top?
Hi Herman,
That is the plan, the second part will be Molded from the bootlid and will bond to the main piece.
Still not sure exactly how to make this second part so it fits well and has a good bonding surface to attach to the main part?
Can someone suggest a good material for adding the flanges to this mold?
Did the op ever make the spoiler?
I would like to see the finished product.
Finish the mold yet?
How did you get the dimension of the spoiler and turned it into CAD? did you 3d scan the trunk?