Means of "Min Draft"
Means of "Min Draft"
(OP)
I have seen plus draft or minus draft callout on the drawings before, but I haveen't seen "Min Draft" so far, anybody knows what means of it?
Thanks
Season
Thanks
Season
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Means of "Min Draft"
RE: Means of "Min Draft"
RE: Means of "Min Draft"
There has to be draft on both sides of boss walls so the part will come out of the mold.
Back in the day when we did a lot of injection molds, we would put in 1/2 of a degree of draft, if eng didn't specify draft.
However, you have to meet tolerances.
This part has the hole tol +/-.005, so we would make the mold to be .0025 bigger dia at the top on the inside hole.
The outside wall would be bigger at the bottom.
Harold G. Morgan
CATIA, QA, CNC & CMM Programmer
RE: Means of "Min Draft"
Perhaps MIN stands for MINUS, perhaps it means something totally different. I am afraid the only person knowing exactly the meaning of the callout is the author of the drawing. According to one of the fundamental dimensioning rules this is way not enough.