I modeled the attachment parts . I want to create draft with 2.5 degree on faces that are Blue.
These drafts are needed to be injected out from mould.
Can anyone help me.
My knowledge is limited in molding but I do not thing this faces can be drafted at this stage. You have to change the entire designing process to get a draft of these faces. I mean sketch drafting will work rather than feature drafting.
i would suggest using manual draft instead of DraftXpert
You should also draft first, fillet later
*PS: You will need to select the curve face (fillet) connected to the two face that you need to draft. The more correct way is to remove the fillet in boss-extrude1, apply draft, and then only apply fillet
Thank you for your answer
can you please send me the model you edited.
My file is useless for you it is in 2019v. If you want I can send a parasolid file.
Hello everyone againThanks to those who respondedI want to make this piece with foam and design the mold from the made piece. Therefore, this piece has its own conditions. I have another question and that's how it isGet the model of the inner part of the piece as a solid
You can create all the inner surface with a zero offset, fill all the outer open surfaces and knit.
(for models with intent for production) It can be beneficial to work from the inside (core) out, there can be unexpected details that the core requires when not being the starting point. The external (body) pattern tends to be more accommodating to draft compensations after the fact (by thickening walls). But the parting line design intent should always be a primary detail for any core and pattern development. (happy modeling)
save out a copy and name it core.
then you can revolve a solid of the outside around it, then use combine tool to subtract the part from the revolved body.
I copied the revolve sketch and closed it up to make a solid and make sure you uncheck merge results box so you have 2 solids.
see the screen cast
others have instructed on how to add the draft, but it's generally good practice to add all drafts before you add any fillets. obviously, when the edge is filleted, by definition it's tangent to the surface so you can't go back and then add draft because the geometry won't let it.
there are times when you can draft the solid feature while you're extruding/cutting it but that can lead to other problems at times so it's best to use it selectively.
you want your drafts and fillets at the end of your model because you don't want to reference drafted or filleted edges in other sketches because drafts and fillets are some of the first features to fail when you change your model or when your design intent changes.
when designing a part for molding, you must consider draft. I've worked with too many models from people who didn't understand draft and designed all of their fits in a without draft condition and were surprised when things changed once they added drafts.
I agree with what others have said about adding your draft before any fillets...
I know from experience, draft is often overlooked by part designers...
It often gets added by mold designers.
How is this going to be molded? Doesn't look possible to injection mold.
David Sloop wrote: I agree with what others have said about adding your draft before any fillets...I know from experience, draft is often overlooked by part designers...It often gets added by mold designers.How is this going to be molded? Doesn't look possible to injection mold.
David Sloop wrote:
yes, fillet and chamfer should be added after drafting
In the other words, Fillet and Chamfer should be added at the end
Just downloaded your part and I'm not sure how the hollow section on 4 wings can be molded ?
I'm wondering the same thing.
Are you learning the SW with this 3D model or designing for a real product? Unless you break this part into 2 half, I don't think it can be molded from injection molding ?
..solid, cut/draft, shell, split..?
Paul Salvador wrote: ..solid, cut/draft, shell, split..?
Paul Salvador wrote:
Just note: when part is splitted, you'd lose the small fillet along the parting line
split the part at the tangent for the radius. then you can still keep the radius on the top part.
Michael Paul wrote: split the part at the tangent for the radius. then you can still keep the radius on the top part.
Michael Paul wrote:
It's not where the split is, it's tooling issue which doesn't last long with small radius along the parting line
we split at the tangent line all the time. bury the radius in the cavity.
i didn't look in great detail at this part in particular, but splitting at the tangent in general isn't a problem
Michael Paul wrote: we split at the tangent line all the time. bury the radius in the cavity. i didn't look in great detail at this part in particular, but splitting at the tangent in general isn't a problem
Its not what I mean. Paul already splitted this part - Look the top half. if Paul kept the fillet then it's above the parting line while the below section showing sharp corner which is flat between the cavity and core then its ok
fair enough. like I said, I didn't look at the part in great detail.
if the part is kept as modeled, then yes, the radius is lost. but the model can also be fixed to keep the radius with the split. it's all part of the design process.
..sure,.. adding corner blends is not a issue.. so, should I also do the aligning ribs, cross ribs, snap features,...?
Paul Salvador wrote: ..sure,.. adding corner blends is not a issue.. so, should I also do the aligning ribs, cross ribs, snap features,...?
Add ribs on the top part and snap feature would work fine - for part like this, should use the permanent (one time) snap
Are you going to do the homework for the OP, Paul?
yeah,..sure, I'll have it all finished Monday morning.., chop-chop!??????
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