In the boss drawing It shows the hole is 1.10 in the cavity mold drawing it's 1.30. Shouldn't they be the same?
In the boss drawing It shows the hole is 1.10 in the cavity mold drawing it's 1.30. Shouldn't they be the same?
Seems like it's resulted of draft
Yeah I was thinking maybe that's why.
There doesn't seem to be draft on those parts, and definitely not enough to account for that kind of dimension difference.
I think we need more info.
Not enough here to go by.
How was each part created?
Using the mold design software?
Is one a subtracted body of the other?
Is that 1.30 dimension to the hidden line geometry?
Better look at it a lot closer...
Gee. If I only had the internet to go to back when I was in school.
I would never have had to figure things out myself...
Here's the model of the actual part.
Math?
the Boss Cavity has a wall of .10
so 1.10 + (.10*2) = 1.30
Eric. Was this dimension due to the shrinkage factor that is added to a mold cavity? Mold cavities are made oversize to some degree so that the material being molded will be the right size when it comes out of the mold. Do a Google search on molding and shrinkage. Without seeing the rest of the dimension of the mold cavity, I would guess the part of the mold that makes the hole in the boss was made oversize to allow for shrinkage.
As Sarah say's, I think you either shelled your part out the wrong direction, or you are measuring from the wrong side of the material. All depends what your intention was.
Jody I stand corrected. Sarah was right. I need to pay closer attention.
Math?
the Boss Cavity has a wall of .10
so 1.10 + (.10*2) = 1.30